JPH06261947A - Injector and its hub, hub connecting structure, and method for assembling injector - Google Patents
Injector and its hub, hub connecting structure, and method for assembling injectorInfo
- Publication number
- JPH06261947A JPH06261947A JP5079184A JP7918493A JPH06261947A JP H06261947 A JPH06261947 A JP H06261947A JP 5079184 A JP5079184 A JP 5079184A JP 7918493 A JP7918493 A JP 7918493A JP H06261947 A JPH06261947 A JP H06261947A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- syringe
- piston
- hole
- insertion hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 12
- 238000003780 insertion Methods 0.000 claims abstract description 360
- 230000037431 insertion Effects 0.000 claims abstract description 360
- 238000002347 injection Methods 0.000 claims abstract description 170
- 239000007924 injection Substances 0.000 claims abstract description 170
- 230000002093 peripheral effect Effects 0.000 claims description 107
- 238000003825 pressing Methods 0.000 claims description 74
- 239000000126 substance Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 description 108
- 230000000694 effects Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 13
- 230000005489 elastic deformation Effects 0.000 description 11
- 238000005452 bending Methods 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000000428 dust Substances 0.000 description 8
- 210000003811 finger Anatomy 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 208000003322 Coinfection Diseases 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 1
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 210000004247 hand Anatomy 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、使い捨て用の注射器に
適用するのに好適な注射器用のハブ及び、該ハブの接続
構造及び、該ハブを用いた注射器及び、該注射器の組立
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe hub suitable for application to a disposable syringe, a connecting structure for the hub, a syringe using the hub, and a method for assembling the syringe.
【０００２】[0002]
【従来の技術】使用後の注射器の注射針には、病原菌等
を含んだ患者の血液等が付着しているので、二次感染を
防止するために、再使用しない使い捨て用の注射器が多
く使用されている。従来の使い捨て用の注射器は、使用
した後に廃棄処分するが、該注射器を取り扱う際に患者
の血液等が付着した注射針で手等を傷つけて、その傷口
を介して二次感染するといった危険を取り除く必要があ
るため、使用後にまず、該注射針をハサミ等で注射器か
ら切断して取り去り、次いで廃棄処分していた。2. Description of the Related Art Since the needle of a used syringe has blood of a patient containing pathogenic bacteria attached to it, many non-reusable disposable syringes are used to prevent secondary infection. Has been done. The conventional disposable syringe is discarded after use, but when handling the syringe, there is a risk that the hand etc. will be injured by the injection needle to which the blood of the patient adheres and the secondary infection will occur through the wound. Since it needs to be removed, after use, the injection needle was first cut off from the syringe with scissors or the like and removed, and then discarded.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の使い捨
て用の注射器では、使用直後より注射針の切断までの間
は、注射針で手等を傷つけないように細心の注意を傾け
て該注射器を取り扱う必要があったため、この取り扱い
の作業は手間がかかるものであった。また、従来の使い
捨て用の注射器では、廃棄処分前に行う注射針の切断作
業が、手間がかかる作業であった。また、使用直後に注
射針を該注射器のシリンジ内に挿入させることにより、
使用直後より安全性を維持し、かつ注射針の切断作業を
省くことのできる使い捨て用の注射器が提案されてい
る。しかし、提案されている該注射器は構造が複雑であ
るため、組立が困難であると共に、操作が困難であっ
た。However, in the conventional disposable syringe, from the time immediately after use until the cutting of the injection needle, pay close attention not to hurt the hand with the injection needle, and carefully attach the syringe. Since it had to be handled, this handling work was troublesome. Further, in the conventional disposable syringe, the work of cutting the injection needle before the disposal is a time-consuming work. In addition, by inserting the injection needle into the syringe of the syringe immediately after use,
There has been proposed a disposable syringe that can maintain safety immediately after use and can eliminate the work of cutting an injection needle. However, since the proposed syringe has a complicated structure, it is difficult to assemble and it is difficult to operate.
【０００４】本発明は、上記事情に鑑み、使い捨て用の
注射器において、使用直後より廃棄処分までの作業を安
全で、かつ手間をかけない作業とせしめ、組立及び、操
作を容易にせしめ得る、注射器用のハブ及び、該ハブの
接続構造及び、該ハブを用いた注射器及び、該注射器の
組立方法を提供することを目的としている。In view of the above circumstances, the present invention provides a disposable syringe, which allows safe and time-saving work from immediately after use to disposal, and facilitates assembly and operation. It is an object of the present invention to provide a hub, a connecting structure for the hub, a syringe using the hub, and a method for assembling the syringe.
【課題を解決するための手段】即ち、本発明のうち第一
の発明は、ピストン（２９）が摺動自在に装着されたシ
リンジ本体（２）を有し、該シリンジ本体（２）の先端
に、注射針導入穴（８ａ）を介して筒状に形成されたハ
ブ挿着穴（４ｂ）を形成し、該ハブ挿着穴（４ｂ）に対
して着脱自在に挿着される注射器用のハブ（９）におい
て、前記ハブ（９）は、前記ハブ挿着穴（４ｂ）に挿入
され、また該ハブ挿着穴（４ｂ）から前記シリンジ本体
（２）内に引き抜き得る筒状のハブ本体（９０）を有
し、前記ハブ本体（９０）の外周部に、シ−ル部（１０
ｅ、５７、６１）を、前記ハブ挿着穴（４ｂ）の内面と
係合し得るように、環状に形成し、前記ハブ本体（９
０）の前記シ−ル部（１０ｅ、５７、６１）以外の部分
の外径を、前記ハブ挿着穴（４ｂ）の対応する部分の内
径よりも小なる形に形成し、前記ハブ本体（９０）の一
端（１１ａ）に、注射針（２６）を挿入し得る針挿入孔
（１２）を、前記ハブ本体（９０）の軸心方向に設け、
前記ハブ本体（９０）に、流通孔（１９）を、前記針挿
入孔（１２）と前記シリンジ本体（２）内とを軸心方向
に連通し得る形で設け、前記ハブ本体（９０）の他端
（１０ｂ）に、ハブ側係合手段（２０）を、前記ピスト
ン（２９）と係合自在に設けて構成した。また、本発明
のうち第二の発明は、第一の発明のハブ（９）を、シ−
ル部（１０ｅ）を溝の形で形成して構成した。また、本
発明のうち第三の発明は、第一の発明のハブ（９）を、
シ−ル部（５７、６１）を突条の形で形成して構成し
た。また、本発明のうち第四の発明は、先端に注射針導
入穴（８ａ）を介してハブ挿着穴（４ｂ）が形成された
シリンジ本体（２）を有するシリンジ（１００）に対し
て、注射器用ハブ（９）を着脱自在に接続したハブ
（９）の接続構造において、前記ハブ挿着穴（４ｂ）に
第一の発明のハブ（９）のハブ本体（９０）を、前記ハ
ブ挿着穴（４ｂ）に挿入され、また該ハブ挿着穴（４
ｂ）から前記シリンジ本体（２）内に引き抜き得ように
る着脱自在に挿入装着し、前記ハブ挿着穴（４ｂ）の内
周面（７ａ）にハブシ−ル部（７ｄ、５９、７ａ）を環
状に設けると共に、前記ハブ本体（９０）のシ−ル部
（１０ｅ、５７、６１）を該ハブシール部（７ｄ、５
９、７ａ）に対して所定の接触圧力（Ｆｂｃ、Ｆｃ）で
接触係合させた形で設け、前記ハブシ−ル部（７ｄ、５
９、７ａ）以外のハブ挿着穴（４ｂ）の内周面（７ａ）
と、前記ハブ本体（９０）の外周面（１０ｉ）との間
に、間隙（４９）を形成して構成した。また、本発明の
うち第五の発明は、先端に注射針導入穴（８ａ）を介し
てハブ挿着穴（４ｂ）が形成されたシリンジ本体（２）
を有するシリンジ（１００）に対して、注射器用ハブ
（９）を着脱自在に接続したハブ（９）の接続構造にお
いて、前記ハブ挿着穴（４ｂ）に第二の発明のハブ
（９）のハブ本体（９０）を、前記ハブ挿着穴（４ｂ）
に挿入され、また該ハブ挿着穴（４ｂ）から前記シリン
ジ本体（２）内に引き抜き得ようにる着脱自在に挿入装
着し、前記ハブ挿着穴（４ｂ）の内周面（７ａ）に突条
が環状に形成された形のハブシ−ル部（７ｄ）を設ける
と共に、前記ハブ本体（９０）のシ−ル部（１０ｅ）を
該ハブシール部（７ｄ）に対して所定の接触圧力（Ｆｂ
ｃ、Ｆｃ）で接触係合させた形で設け、前記ハブシ−ル
部（７ｄ）以外のハブ挿着穴（４ｂ）の内周面（７ａ）
と、前記ハブ本体（９０）の外周面（１０ｉ）との間
に、間隙（４９）を形成して構成した。また、本発明の
うち第六の発明は、先端に注射針導入穴（８ａ）を介し
てハブ挿着穴（４ｂ）が形成されたシリンジ本体（２）
を有するシリンジ（１００）に対して、注射器用ハブ
（９）を着脱自在に接続したハブ（９）の接続構造にお
いて、前記ハブ挿着穴（４ｂ）に第三の発明のハブ
（９）のハブ本体（９０）を、前記ハブ挿着穴（４ｂ）
に挿入され、また該ハブ挿着穴（４ｂ）から前記シリン
ジ本体（２）内に引き抜き得ようにる着脱自在に挿入装
着し、前記ハブ挿着穴（４ｂ）の内周面（７ａ）に溝が
環状に形成された形のハブシ−ル部（５９）を設けると
共に、前記ハブ本体（９０）のシ−ル部（５７）を該ハ
ブシール部（５９）に対して所定の接触圧力（Ｆｂｃ、
Ｆｃ）で接触係合させた形で設け、前記ハブシ−ル部
（５９）以外のハブ挿着穴（４ｂ）の内周面（７ａ）
と、前記ハブ本体（９０）の外周面（１０ｉ）との間
に、間隙（４９）を形成して構成した。また、本発明の
うち第七の発明は、第五又は第六の発明によるハブ
（９）の接続構造において、前記シール部（１０ｅ、５
７）の幅と前記ハブシール部（７ｄ、５９）の幅が相違
するようにして構成した。また、本発明のうち第八の発
明は、先端に注射針導入穴（８ａ）を介してハブ挿着穴
（８ａ）が形成されたシリンジ本体（２）を有するシリ
ンジ（１００）に対して、注射器用ハブ（９）を着脱自
在に接続したハブ（９）の接続構造において、前記ハブ
挿着穴（４ｂ）に第三の発明のハブ（９）のハブ本体
（９０）を、前記ハブ挿着穴（４ｂ）に挿入され、また
該ハブ挿着穴（４ｂ）から前記シリンジ本体（２）内に
引き抜き得ようにる着脱自在に挿入装着し、前記ハブ挿
着穴（４ｂ）の内周面（７ａ）と同一の面上にハブシー
ル部（７ａ）を設けると共に、前記ハブ本体（９０）の
シ−ル部（５７、６１）を該ハブシール部（７ａ）に対
して所定の接触圧力（Ｆｂｃ、Ｆｃ）で接触係合させた
形で設け、前記ハブシ−ル部（７ａ）以外のハブ挿着穴
（４ｂ）の内周面（７ａ）と、前記ハブ本体（９０）の
外周面（１０ｉ）との間に、間隙（４９）を形成して構
成した。また、本発明のうち第九の発明は、第四又は第
五又は第六又は第八の発明のハブ（９）の接続構造にお
いて、前記ハブ本体（９０）を前記注射針導入穴（４
ａ）側から前記ハブ挿着穴（４ａ）に対して挿着し得る
ようにして構成した。また、本発明のうち第十の発明
は、第四又は第五又は第六又は第八の発明のハブ（９）
の接続構造において、前記シリンジ本体（２）の注射針
導入穴（４ｂ）の周囲に１個以上のスリット（５０）を
形成して構成した。また、本発明のうち第十一の発明
は、第四の発明の接続構造をなすシリンジ（１００）及
びハブ（９）を有し、前記シリンジ本体（２）に、該シ
リンジ本体（２）の内部（２ａ）を軸方向に閉塞する形
のピストン（２９）を、前記シリンジ本体（２）に対し
て軸方向に移動自在に設け、前記ピストン（２９）に、
前記ハブ（９）のハブ側係合手段（２０）と係合し得る
ピストン側係合手段（３６）を、前記ハブ側係合手段
（２０）に対向する形で設け、前記ハブ（９）の針挿入
孔（１２）に、注射針（２６）を設けて構成した。ま
た、本発明のうち第十二の発明は、第五の発明の接続構
造をなすシリンジ（１００）及びハブ（９）を有し、前
記シリンジ本体（２）に、該シリンジ本体（２）の内部
（２ａ）を軸方向に閉塞する形のピストン（２９）を、
前記シリンジ本体（２）に対して軸方向に移動自在に設
け、前記ピストン（２９）に、前記ハブ（９）のハブ側
係合手段（２０）と係合し得るピストン側係合手段（３
６）を、前記ハブ側係合手段（２０）に対向する形で設
け、前記ハブの針挿入孔（１２）に、注射針（２６）を
設けて構成した。また、本発明のうち第十三の発明は、
第六の発明の接続構造をなすシリンジ（１００）及びハ
ブ（９）を有し、前記シリンジ本体（２）に、該シリン
ジ本体（２）の内部（２ａ）を軸方向に閉塞する形のピ
ストン（２９）を、前記シリンジ本体（２）に対して軸
方向に移動自在に設け、前記ピストン（２９）に、前記
ハブ（９）のハブ側係合手段（２０）と係合し得るピス
トン側係合手段（３６）を、前記ハブ側係合手段（２
０）に対向する形で設け、前記ハブ（９）の針挿入孔
（１２）に、注射針（２６）を設けて構成した。また、
本発明のうち第十四の発明は、第八の発明の接続構造を
なすシリンジ（１００）及びハブ（９）を有し、前記シ
リンジ本体（２）に、該シリンジ本体（２）の内部（２
ａ）を軸方向に閉塞する形のピストン（２９）を、前記
シリンジ本体（２）に対して軸方向に移動自在に設け、
前記ピストン（２９）に、前記ハブ（９）のハブ側係合
手段（２０）と係合し得るピストン側係合手段（３６）
を、前記ハブ側係合手段（２０）に対向する形で設け、
前記ハブの針挿入孔（１２）に、注射針（２６）を設け
て構成した。また、本発明のうち第十五の発明は、第十
二又は第十三の発明の注射器（１）において、前記シー
ル部（１０ｅ、５７）の幅と前記ハブシール部（７ｄ、
５９）の幅が相違するようにして構成した。また、本発
明のうち第十六の発明は、第十一又は第十二又は第十三
又は第十四の発明の注射器（１）において、前記ピスト
ン（２９）はピストン本体（３０）が操作部（３２）と
薬液押圧部（３３）の間で折取り自在に構成された。ま
た、本発明のうち第十七の発明は、第十六の発明の注射
器（１）において、前記シリンジ本体（２）にピストン
ストッパ（３ｂ）を、前記ピストン（２９）の薬液押圧
部（３３）が前記シリンジ本体（２）から抜け出さない
ように形成して構成した。また、本発明のうち第十八の
発明は、第十六の発明の注射器（１）において、前記ピ
ストン（２９）のピストン本体（３０）には折取り用切
欠き（３１）が形成されている。また、本発明のうち第
十九の発明は、第十七の発明の注射器（１）において、
前記ピストン（２９）のピストン本体（３０）には折取
り用切欠き（３１）が形成されている。また、本発明の
うち第二十の発明は、第十九の発明の注射器（１）にお
いて、前記切り欠き（３１）は、前記ピストン（２９）
が前記ピストンストッパ（３ｂ）に当接した際に、前記
シリンジ本体（２）の端部（３ａ）に位置し得るように
形成された。また、本発明のうち第二十一の発明は、第
十一又は第十二又は第十三又は第十四の発明の注射器
（１）を組立る際、ハブ（９）を、前記シリンジ本体
（２）のピストン（２９）装着側より前記ハブ挿着穴
（４ｂ）に対して挿入し、前記ハブ（９）を、該ハブ
（９）のシ−ル部（１０ｅ、５７、６１）と前記ハブ挿
着部（４ｂ）のハブシ−ル部（７ｄ、５９、７ａ）とを
互いに弾性的に係合させる形で設置し、前記シリンジ
（１００）に、ピストン（２９）を挿入して構成した。
また、本発明のうち第二十二の発明は、第十一又は第十
二又は第十三又は第十四の発明の注射器（１）を組立る
際、前記シリンジ（１００）に、ピストン（２９）を挿
入し、ハブ（９）を、前記シリンジ本体（２）の注射針
導入穴（８ａ）側より前記ハブ挿着穴（４ｂ）に対して
挿入し、前記ハブ（９）を、該ハブ（９）のシ−ル部
（１０ｅ、５７、６１）と前記ハブ挿着部（４ｂ）のハ
ブシ−ル部（７ｄ、５９、７ａ）とを互いに弾性的に係
合させる形で設置し、前記ハブ（９）の針挿入孔（１
２）に、注射針（２６）を挿入接続して構成した。ま
た、本発明のうち第二十三の発明は、第十一又は第十二
又は第十三又は第十四の発明の注射器（１）を組立る
際、前記シリンジ（１００）に、ピストン（２９）を挿
入し、注射針（２６）の装着された状態のハブ（９）
を、前記シリンジ本体（２）の注射針導入穴（８ａ）側
より前記ハブ挿着穴（４ｂ）に対して挿入し、前記ハブ
（９）を、該ハブ（９）のシ−ル部（１０ｅ、５７、６
１）と前記ハブ挿着部（４ｂ）のハブシ−ル部（７ｄ、
５９、７ａ）とを互いに弾性的に係合させる形で設置し
て構成した。また、本発明のうち第二十四の発明は、第
十一又は第十二又は第十三又は第十四の発明の注射器
（１）を組立る際、前記シリンジ本体（２）の注射針導
入穴（８ａ）の周囲に１個以上のスリット（５０）を形
成しておき、前記シリンジ（１００）に、ピストン（２
９）を挿入し、注射針（２６）の装着された状態のハブ
（９）を、前記シリンジ本体（２）の注射針導入穴（８
ａ）側より前記ハブ挿着穴（４ｂ）に対して挿入し、前
記ハブ（９）を、該ハブ（９）のシ−ル部（１０ｅ、５
７、６１）と前記ハブ挿着部（４ｂ）のハブシ−ル部
（７ｄ、５９、７ａ）とを互いに弾性的に係合させる形
で設置して構成した。また、本発明のうち第二十五の発
明は、第十一又は第十二又は第十三又は第十四の発明の
注射器（１）を組立る際、前記シリンジ本体（２）の注
射針導入穴（８ａ）の周囲に１個以上のスリット（５
０）を形成しておき、前記シリンジ（１００）に、ピス
トン（２９）を挿入し、ハブ（９）を、前記シリンジ本
体（２）の注射針導入穴（８ａ）側より前記ハブ挿着穴
（４ｂ）に対して挿入し、前記ハブ（９）を、該ハブ
（９）のシ−ル部（１０ｅ、５７、６１）と前記ハブ挿
着部（４ｂ）のハブシ−ル部（７ｄ、５９、７ａ）とを
互いに弾性的に係合させる形で設置し、前記ハブ（９）
の針挿入孔（１２）に、注射針（２６）を挿入接続して
構成した。なお、（ ）内の番号等は、図面における対
応する要素を示す、便宜的なものであり、従って、本記
述は図面上の記載に限定拘束されるものではない。以下
の作用の欄についても同様である。That is, the first invention of the present invention has a syringe body (2) on which a piston (29) is slidably mounted, and the tip of the syringe body (2). A hub insertion hole (4b) formed in a tubular shape through an injection needle introduction hole (8a), and is detachably inserted into the hub insertion hole (4b). In the hub (9), the hub (9) is a cylindrical hub body that is inserted into the hub insertion hole (4b) and can be pulled out from the hub insertion hole (4b) into the syringe body (2). (90), and a seal portion (10) on the outer peripheral portion of the hub body (90).
e, 57, 61) are formed in an annular shape so as to engage with the inner surface of the hub insertion hole (4b), and the hub body (9
The outer diameter of the portion other than the seal portions (10e, 57, 61) of (0) is formed to be smaller than the inner diameter of the corresponding portion of the hub insertion hole (4b), and the hub body ( A needle insertion hole (12) into which an injection needle (26) can be inserted, is provided at one end (11a) of 90) in the axial direction of the hub body (90);
The hub body (90) is provided with a flow hole (19) in such a manner that the needle insertion hole (12) and the inside of the syringe body (2) can be communicated in the axial direction. A hub side engaging means (20) is provided at the other end (10b) so as to be engageable with the piston (29). A second aspect of the present invention is a hub (9) according to the first aspect of the invention.
The groove portion (10e) was formed in the shape of a groove. A third invention of the present invention is the hub (9) of the first invention,
The seal portions (57, 61) were formed in the shape of ridges. In addition, a fourth aspect of the present invention relates to a syringe (100) having a syringe body (2) having a hub insertion hole (4b) formed at an end thereof through an injection needle introduction hole (8a), In a connection structure of a hub (9) to which a syringe hub (9) is detachably connected, the hub body (90) of the hub (9) of the first invention is inserted into the hub insertion hole (4b). The hub insertion hole (4b) is inserted into the hub insertion hole (4b).
From the b) into the syringe body (2) so that it can be pulled out, the hub seal part (7d, 59, 7a) is attached to the inner peripheral surface (7a) of the hub insertion hole (4b). And the seal portions (10e, 57, 61) of the hub body (90) are attached to the hub seal portions (7d, 5d).
9 and 7a) are provided so as to be in contact and engaged with each other at a predetermined contact pressure (Fbc, Fc), and the hub seal portions (7d, 5d) are provided.
Inner peripheral surface (7a) of hub insertion hole (4b) other than 9, 7a)
And a peripheral surface (10i) of the hub body (90) with a gap (49) formed. Further, a fifth aspect of the present invention is a syringe body (2) having a hub insertion hole (4b) formed at the distal end through an injection needle introduction hole (8a).
In the connection structure of the hub (9) in which the syringe hub (9) is detachably connected to the syringe (100) having the above, the hub (9) of the second invention is inserted into the hub insertion hole (4b). Replace the hub body (90) with the hub insertion hole (4b).
And is detachably inserted into the syringe body (2) through the hub insertion hole (4b) so as to be attached to the inner peripheral surface (7a) of the hub insertion hole (4b). A hub seal portion (7d) having an annular projection is provided, and the seal portion (10e) of the hub body (90) is contacted with the hub seal portion (7d) at a predetermined contact pressure ( Fb
c, Fc) provided in the form of contact engagement with each other, and the inner peripheral surface (7a) of the hub insertion hole (4b) other than the hub seal portion (7d).
And a peripheral surface (10i) of the hub body (90) with a gap (49) formed. A sixth aspect of the present invention is a syringe body (2) having a hub insertion hole (4b) formed at a tip thereof through an injection needle introduction hole (8a).
In a connecting structure of a hub (9) in which a syringe hub (9) is detachably connected to a syringe (100) having a hub (9), the hub (9) of the third invention is inserted into the hub insertion hole (4b). Replace the hub body (90) with the hub insertion hole (4b).
And is detachably inserted into the syringe body (2) through the hub insertion hole (4b) so as to be attached to the inner peripheral surface (7a) of the hub insertion hole (4b). A hub seal portion (59) having an annular groove is provided, and the seal portion (57) of the hub body (90) contacts the hub seal portion (59) at a predetermined contact pressure (Fbc). ,
Fc) provided in the form of contact engagement with each other, and the inner peripheral surface (7a) of the hub insertion hole (4b) other than the hub seal portion (59).
And a peripheral surface (10i) of the hub body (90) with a gap (49) formed. The seventh invention of the present invention is the connection structure for the hub (9) according to the fifth or sixth invention, wherein
The width of 7) is different from the width of the hub seal portions (7d, 59). Further, the eighth invention of the present invention relates to a syringe (100) having a syringe body (2) having a hub insertion hole (8a) formed at the tip through an injection needle introduction hole (8a), In a connection structure of a hub (9) to which a syringe hub (9) is detachably connected, the hub body (90) of the hub (9) of the third invention is inserted into the hub insertion hole (4b). The hub is inserted into the fitting hole (4b) and is detachably inserted into the syringe body (2) through the hub fitting hole (4b) so that the inner circumference of the hub fitting hole (4b) can be removed. The hub seal portion (7a) is provided on the same surface as the surface (7a), and the seal portions (57, 61) of the hub body (90) are contacted with the hub seal portion (7a) at a predetermined contact pressure ( Fbc, Fc) are provided in the form of contact engagement with each other, and the parts other than the hub seal part (7a) are provided. The inner peripheral surface of the insertion hole (4b) and (7a), between the outer peripheral surface of the hub body (90) (10i), was constructed to form a gap (49). A ninth aspect of the present invention is the hub (9) connection structure of the hub (90) of the fourth or fifth or sixth or eighth aspect of the present invention.
It was configured such that it can be inserted into the hub insertion hole (4a) from the side (a). The tenth invention of the present invention is the hub of the fourth or fifth or sixth or eighth invention (9).
In the above connection structure, one or more slits (50) are formed around the injection needle introduction hole (4b) of the syringe body (2). The eleventh invention of the present invention has a syringe (100) and a hub (9) having the connection structure of the fourth invention, wherein the syringe body (2) is provided with the syringe body (2). A piston (29) that axially closes the inside (2a) is provided movably in the axial direction with respect to the syringe body (2), and the piston (29) is
Piston side engaging means (36) capable of engaging with the hub side engaging means (20) of the hub (9) is provided so as to face the hub side engaging means (20), and the hub (9) is provided. An injection needle (26) was provided in the needle insertion hole (12). The twelfth invention of the present invention has a syringe (100) and a hub (9) that form the connection structure of the fifth invention, and the syringe body (2) is provided with the syringe body (2) of the syringe body (2). A piston (29) having a shape that axially closes the inside (2a),
Piston side engaging means (3) which is provided movably in the axial direction with respect to the syringe body (2) and is capable of engaging the piston (29) with the hub side engaging means (20) of the hub (9).
6) is provided so as to face the hub side engaging means (20), and an injection needle (26) is provided in the needle insertion hole (12) of the hub. The thirteenth invention of the present invention is
A piston having a syringe (100) and a hub (9) that form the connection structure of the sixth aspect of the present invention, wherein the syringe body (2) axially closes the interior (2a) of the syringe body (2). (29) is provided movably in the axial direction with respect to the syringe body (2), and the piston (29) can be engaged with the hub side engaging means (20) of the hub (9). The engaging means (36) is replaced with the hub side engaging means (2
0) and the injection needle (26) is provided in the needle insertion hole (12) of the hub (9). Also,
A fourteenth aspect of the present invention has a syringe (100) and a hub (9) having the connection structure of the eighth aspect of the present invention, wherein the syringe body (2) is provided with the inside of the syringe body (2) ( Two
A piston (29) for axially closing a) is provided so as to be movable in the axial direction with respect to the syringe body (2),
Piston side engaging means (36) capable of engaging the piston (29) with the hub side engaging means (20) of the hub (9).
Is provided so as to face the hub side engaging means (20),
An injection needle (26) was provided in the needle insertion hole (12) of the hub. The fifteenth invention of the present invention is the syringe (1) according to the twelfth or thirteenth invention, wherein the width of the seal portion (10e, 57) and the hub seal portion (7d,
The width of (59) is different. The sixteenth invention of the present invention is the syringe (1) according to the eleventh or twelfth or thirteenth or fourteenth invention, wherein the piston (29) is operated by the piston body (30). The part (32) and the chemical solution pressing part (33) were configured to be breakable. A seventeenth invention of the present invention is the syringe (1) according to the sixteenth invention, wherein the syringe body (2) is provided with a piston stopper (3b) and the piston (29) is provided with a chemical solution pressing portion (33). ) Is formed so as not to come out of the syringe body (2). The eighteenth invention of the present invention is the syringe (1) according to the sixteenth invention, wherein a notch (31) for breaking is formed in the piston body (30) of the piston (29). There is. The nineteenth invention of the present invention is the syringe (1) according to the seventeenth invention,
The piston body (30) of the piston (29) is formed with a notch (31) for breaking. The twenty-first invention of the present invention is the syringe (1) according to the nineteenth invention, wherein the notch (31) is the piston (29).
Is formed so that it can be located at the end (3a) of the syringe body (2) when it comes into contact with the piston stopper (3b). A twenty-first invention of the present invention is such that, when assembling the injector (1) of the eleventh or twelfth or thirteenth or fourteenth invention, the hub (9) is attached to the syringe body. (2) is inserted into the hub insertion hole (4b) from the piston (29) mounting side, and the hub (9) is connected to the seal portions (10e, 57, 61) of the hub (9). The hub insert portion (4b) is installed in such a manner that the hub seal portions (7d, 59, 7a) are elastically engaged with each other, and the piston (29) is inserted into the syringe (100). did.
A twenty-second aspect of the present invention is such that, when assembling the syringe (1) of the eleventh or twelfth or thirteenth or fourteenth invention, a piston ( 29), the hub (9) is inserted into the hub insertion hole (4b) from the side of the injection needle introduction hole (8a) of the syringe body (2), and the hub (9) is inserted. The seal portion (10e, 57, 61) of the hub (9) and the hub seal portion (7d, 59, 7a) of the hub insertion portion (4b) are installed so as to be elastically engaged with each other. , The needle insertion hole (1) of the hub (9)
An injection needle (26) was inserted and connected to 2). A twenty-third invention of the present invention is such that, when assembling the syringe (1) of the eleventh or twelfth or thirteenth or fourteenth invention, a piston ( 29) with the injection needle (26) inserted and the hub (9) inserted
Is inserted into the hub insertion hole (4b) from the side of the injection needle introduction hole (8a) of the syringe body (2), and the hub (9) is attached to the seal portion () of the hub (9). 10e, 57, 6
1) and the hub seal part (7d, of the hub insertion part (4b))
59, 7a) and elastically engaged with each other. A twenty-fourth aspect of the present invention is the injection needle of the syringe body (2) when assembling the syringe (1) according to the eleventh or twelfth or thirteenth or fourteenth invention. One or more slits (50) are formed around the introduction hole (8a), and the piston (2) is attached to the syringe (100).
9) is inserted, and the hub (9) with the injection needle (26) attached is inserted into the injection needle introduction hole (8) of the syringe body (2).
The hub (9) is inserted into the hub insertion hole (4b) from the side (a) and the seal portion (10e, 5) of the hub (9) is inserted.
7, 61) and the hub seal portions (7d, 59, 7a) of the hub insertion portion (4b) are elastically engaged with each other. The twenty-fifth aspect of the present invention is the injection needle of the syringe body (2) when assembling the syringe (1) according to the eleventh or twelfth or thirteenth or fourteenth invention. One or more slits (5
0) is formed, the piston (29) is inserted into the syringe (100), and the hub (9) is attached to the hub insertion hole from the injection needle introduction hole (8a) side of the syringe body (2). The hub (9) is inserted into the hub (9), and the hub (9) is inserted into the seal (10e, 57, 61) of the hub (9) and the hub seal (7d, 7d 59, 7a) so as to be elastically engaged with each other, and the hub (9)
The injection needle (26) was inserted and connected to the needle insertion hole (12) of the above. The numbers in parentheses () indicate the corresponding elements in the drawings for the sake of convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the following action columns.
【０００５】[0005]
【作用】上記した構成により本発明のうち第一乃至第三
の発明によるハブ（９）は、シ−ル部（１０ｅ、５７、
６１）においてのみ、ハブ挿着穴（４ｂ）の内面側と接
触係合する。また、本発明のうち第四乃至第六及び、第
八の発明による接続構造では、ハブ挿着穴（４ｂ）とハ
ブ（９）とは、ハブシ−ル部（７ｄ、５９、７ａ）とシ
−ル部（１０ｅ、５７、６１）との間においてのみ接触
係合し、ハブシ−ル部（７ｄ、５９、７ａ）とシ−ル部
（１０ｅ、５７、６１）との間は所定の接触圧力により
シ−ルされる。また、本発明のうち第七の発明による接
続構造では、第四乃至第六及び、第八の発明による接続
構造と同様に作用すると共に、更にハブシ−ル部（７
ｄ、５９）とシ−ル部（１０ｅ、５７）との間が２ヵ所
における点接触のシ−ルとなる。また、本発明のうち第
九の発明による接続構造では、第四乃至第六及び、第八
の発明による接続構造と同様に作用すると共に、更に組
立の際、シリンジ本体（２）の内部（２ａ）を介さな
い。また、本発明のうち第十の発明による接続構造で
は、第四乃至第六及び、第八の発明による接続構造と同
様に作用すると共に、更に組立の際、スリット（５０）
により分割されたシリンジ本体（２）の注射針導入穴
（８ａ）の周囲が、注射針導入穴（８ａ）の径を広げる
形で膨張する。また、本発明のうち第十一乃至第十四の
発明による注射器（１）は、使用中に、ハブ挿着穴（４
ｂ）とハブ（９）とが、ハブシ−ル部（７ｄ、５９、７
ａ）とシ−ル部（１０ｅ、５７、６１）との間において
シ−ル状態を維持した形で接触係合し、使用後に、ピス
トン（２９）の軸方向の操作により、該ピストン（２
９）とハブ（９）とを係合させて、ハブ（９）及び、注
射針（２６）をシリンジ本体（２）の内部（２ａ）に挿
入格納させる。また、本発明のうち第十五の発明による
注射器（１）は、第十一乃至第十四の発明による注射器
（１）と同様に作用すると共に、更にハブシ−ル部（７
ｄ、５９）とシ−ル部（１０ｅ、５７）との間が２ヵ所
における点接触のシ−ルとなる。また、本発明のうち第
十六の発明による注射器（１）は、第十一乃至第十四の
発明による注射器（１）と同様に作用すると共に、更に
ハブ（９）及び、注射針（２６）の挿入格納後、ピスト
ン（２９）を２つに分離する。また、本発明のうち第十
七の発明による注射器（１）は、第十六の発明による注
射器（１）と同様に作用すると共に、更にピストンスト
ッパ（３ｂ）によりピストン（２９）の移動が停止され
る。また、本発明のうち第十八の発明による注射器
（１）は、第十六の発明による注射器（１）と同様に作
用すると共に、更に折り取りの際の曲げ応力が切欠き
（３１）に加わる。また、本発明のうち第十九の発明に
よる注射器（１）は、第十七の発明による注射器（１）
と同様に作用すると共に、更にピストンストッパ（３
ｂ）とシリンジ本体（２）の端部（３ａ）が支点となっ
て折り取りの際の曲げ応力が支持される。また、本発明
のうち第二十の発明による注射器（１）は、第十九の発
明による注射器（１）と同様に作用すると共に、更に支
点である端部（３ａ）の位置の切欠き（３１）に折り取
りの際の曲げ応力が加わる。また、本発明のうち第二十
一の発明による組立方法は、ハブ（９）の挿入装着をピ
ストン挿着側よりを行う。また、本発明のうち第二十二
の発明による組立方法は、ハブ（９）を、シリンジ本体
（２）の内部（２ａ）を介さずに、注射針導入穴（８
ａ）側より挿入装着する。また、本発明のうち第二十四
及び第二十五の発明による組立方法は、ハブ（９）の挿
入装着を、シリンジ本体（２）の内部（２ａ）を介さず
に、注射針導入穴（８ａ）側より行うと共に、スリット
（５０）により分割されたシリンジ本体（２）の注射針
導入穴（８ａ）の周囲を、注射針導入穴（８ａ）の径を
広げる形で膨張させて行う。With the above-mentioned structure, the hub (9) according to the first to third aspects of the present invention has the seal portions (10e, 57, 57).
Only in 61), the inner surface side of the hub insertion hole (4b) is in contact and engaged. In the connection structure according to the fourth to sixth and eighth aspects of the present invention, the hub insertion hole (4b) and the hub (9) are connected to the hub seal portions (7d, 59, 7a) and the seal. -Contact engagement only with the seal parts (10e, 57, 61), and a predetermined contact between the hub seal parts (7d, 59, 7a) and the seal parts (10e, 57, 61). Sealed by pressure. The connection structure according to the seventh aspect of the present invention operates in the same manner as the connection structures according to the fourth to sixth and eighth aspects, and further has a hub seal portion (7).
The point contact seals are formed at two locations between the d, 59) and the seal portion (10e, 57). In addition, the connection structure according to the ninth aspect of the present invention operates in the same manner as the connection structures according to the fourth to sixth and eighth aspects, and during assembly, the inside of the syringe body (2) (2a ) Does not go through. In addition, the connection structure according to the tenth aspect of the present invention operates in the same manner as the connection structures according to the fourth to sixth and eighth aspects, and further has a slit (50) during assembly.
The periphery of the injection needle introduction hole (8a) of the syringe body (2) divided by the above expands in such a manner that the diameter of the injection needle introduction hole (8a) is widened. In addition, the syringe (1) according to the eleventh to fourteenth aspects of the present invention has a hub insertion hole (4) during use.
b) and the hub (9), the hub seal (7d, 59, 7)
a) and the seal portions (10e, 57, 61) are brought into contact with each other in a state where the seal state is maintained, and after use, the piston (2) is axially operated to operate the piston (2).
9) and the hub (9) are engaged, and the hub (9) and the injection needle (26) are inserted and stored in the inside (2a) of the syringe body (2). The syringe (1) according to the fifteenth invention of the present invention operates in the same manner as the syringe (1) according to the eleventh to fourteenth inventions, and further has a hub seal part (7).
The point contact seals are formed at two locations between the d, 59) and the seal portion (10e, 57). The syringe (1) according to the sixteenth invention of the present invention operates in the same manner as the syringe (1) according to the eleventh to fourteenth inventions, and further has a hub (9) and an injection needle (26). ), The piston (29) is separated into two. In addition, the syringe (1) according to the seventeenth invention of the present invention acts in the same manner as the syringe (1) according to the sixteenth invention, and further, the movement of the piston (29) is stopped by the piston stopper (3b). To be done. In addition, the syringe (1) according to the eighteenth invention of the present invention acts in the same manner as the syringe (1) according to the sixteenth invention, and bending stress at the time of breaking is caused in the notch (31). Join. The syringe (1) according to the nineteenth invention of the present invention is the syringe (1) according to the seventeenth invention.
And the piston stopper (3
B) and the end portion (3a) of the syringe body (2) serve as a fulcrum to support bending stress at the time of breaking. In addition, the syringe (1) according to the twenty-first aspect of the present invention operates in the same manner as the syringe (1) according to the nineteenth aspect of the present invention, and further has a notch ( Bending stress at the time of breaking is applied to 31). In the assembling method according to the twenty-first aspect of the present invention, the hub (9) is inserted and attached from the piston insertion side. Further, in the assembling method according to the twenty-second aspect of the present invention, the hub (9) is not inserted through the inside (2a) of the syringe body (2), and the injection needle introducing hole (8
Insert from the side a). In the assembling methods according to the twenty-fourth and twenty-fifth inventions of the present invention, the hub (9) is inserted and mounted without using the inside (2a) of the syringe body (2) and the injection needle introducing hole. It is performed from the (8a) side, and the periphery of the injection needle introduction hole (8a) of the syringe body (2) divided by the slit (50) is expanded by expanding the diameter of the injection needle introduction hole (8a). .
【０００６】[0006]
【実施例】図１は、本発明による注射器の一例を示した
模式断面図、図２は、図１に示す注射器のハブ付近にお
ける拡大断面図、図３は、図２に示すハブ挿着部付近の
自然状態の図、図４は、図２に示すハブ挿着部とハブと
の間の力学的関係を示した図、図５は、図１に示すハブ
とピストンの位置関係を示した図、図６は、図２に示す
ハブ挿着部に、ハブを挿着する工程を示した図、図７
は、図２に示すハブ挿着部に、ハブを挿着する工程を示
した図、図８は、図２に示すハブ挿着部とハブとの間の
力学的関係を示した図、図９は、図２に示すハブに、ピ
ストンを係合させる工程を示した図、図１０は、図１に
示す注射器において、ピストンの折り取りを行っている
図、図１１は、本発明による注射器のうち、シリンジに
スリットが設けられて構成された注射器の一例を示した
模式断面図、図１２は、図１１に示す注射器のハブ付近
における拡大断面図、図１３は、図１１に示すハブ挿着
部付近の自然状態の図、図１４は、図１３のＩ矢視図、
図１５は、図１２に示すハブ挿着部とハブとの間の力学
的関係を示した図、図１６は、本発明による注射器のう
ち、ハブ側にシ−ルリブが形成され、ハブ挿入孔側にシ
−ル溝が形成された注射器の一例におけるハブ付近の拡
大断面図、図１７は、本発明による注射器のうち、ハブ
側にシ−ルリブが形成され、ハブ挿入孔側のハブシ−ル
部がハブ挿入孔の内周面に一致する形の注射器の一例に
おけるハブ付近の拡大断面図、図１８は、本発明による
注射器のうち、ハブ側にヒダ部が形成され、ハブ挿入孔
側のハブシ−ル部がハブ挿入孔の内周面に一致する形の
注射器の一例におけるハブ付近の拡大断面図である。1 is a schematic sectional view showing an example of a syringe according to the present invention, FIG. 2 is an enlarged sectional view near a hub of the syringe shown in FIG. 1, and FIG. 3 is a hub insertion portion shown in FIG. FIG. 4 is a diagram showing a natural state in the vicinity, FIG. 4 is a diagram showing a mechanical relationship between the hub insertion portion and the hub shown in FIG. 2, and FIG. 5 is a positional relation between the hub and the piston shown in FIG. 7 and 8 are views showing a process of inserting the hub into the hub inserting portion shown in FIG.
FIG. 8 is a diagram showing a step of inserting the hub into the hub inserting portion shown in FIG. 2, and FIG. 8 is a diagram showing a mechanical relationship between the hub inserting portion and the hub shown in FIG. 9 is a diagram showing a step of engaging the piston with the hub shown in FIG. 2, FIG. 10 is a diagram showing the piston being broken off in the syringe shown in FIG. 1, and FIG. 11 is a syringe according to the present invention. Among them, a schematic cross-sectional view showing an example of a syringe configured by providing a slit in the syringe, FIG. 12 is an enlarged cross-sectional view near the hub of the syringe shown in FIG. 11, and FIG. 13 is a hub insertion shown in FIG. FIG. 14 is a view of a natural state near the wearing part, FIG.
15 is a view showing a mechanical relationship between the hub insertion portion and the hub shown in FIG. 12, and FIG. 16 is a syringe according to the present invention in which a seal rib is formed on the hub side and a hub insertion hole is formed. FIG. 17 is an enlarged cross-sectional view of the vicinity of the hub in an example of a syringe having a seal groove formed on the side thereof. FIG. FIG. 18 is an enlarged cross-sectional view of the vicinity of the hub in an example of a syringe in which the portion corresponds to the inner peripheral surface of the hub insertion hole, and FIG. It is an expanded sectional view near a hub in an example of a syringe in which a hub seal part corresponds to an inner skin of a hub insertion hole.
【０００７】本発明による注射器１は、図１に示すよう
に、樹脂製のシリンジ１００を有しており、シリンジ１
００には、シリンジ本体２が設けられている（なお、図
１は注射器１の模式断面図であるが、便宜上、後述する
ピストン２９の一部においては、断面でなく側面を示し
てある。）。また、シリンジ本体２には、円筒状に形成
された主円筒部３が設けられている。ここで、主円筒部
３の軸心方向即ち、軸心Ｐ１に平行な正逆両方向を図の
矢印Ａ方向（即ち、図１の紙面左方向）及び、矢印Ｂ方
向（図１の紙面右方向）とする。主円筒部３の外周側に
は、該主円筒部３の矢印Ｂ側（図１の紙面右側）の開口
端部３ａ付近において、平板状の注射器支持部５が、該
主円筒部３に対してツバ状に設けられており、注射器支
持部５の両板面は、矢印Ａ、Ｂ方向に垂直になってい
る。主円筒部３の内周面３ｃ側には、前記開口端部３ａ
付近において、主円筒部３の軸心Ｐ１に向かう方向即
ち、図の矢印Ｄ方向に突起した係止リブ３ｂが、該内周
面３ｃに沿って円環状に形成されている。主円筒部３の
矢印Ａ側（図１の紙面左側）には、漏斗形状のテ−パ部
６が、該主円筒部３に一体的に連続する形で形成されて
おり、テ−パ部６の矢印Ａ、Ｂ方向に垂直な断面（即
ち、円形断面）における内径は、矢印Ａ方向に向かって
収斂している。なお、主円筒部３の内部と、テ−パ部６
の内部とは、矢印Ａ、Ｂ方向に連通しており、これら両
内部を合わせた空間をシリンジ本体２の内部空間２ａと
する。The syringe 1 according to the present invention has a resin syringe 100 as shown in FIG.
00 is provided with a syringe body 2 (note that FIG. 1 is a schematic cross-sectional view of the syringe 1, but for convenience, a part of a piston 29, which will be described later, shows a side surface rather than a cross-section). . Further, the syringe body 2 is provided with a main cylindrical portion 3 formed in a cylindrical shape. Here, the axial direction of the main cylindrical portion 3, that is, both the forward and reverse directions parallel to the axial center P1, are the direction of arrow A in the figure (that is, the left direction on the paper surface of FIG. 1) and the direction of the arrow B (the right direction on the paper surface of FIG. 1). ). On the outer peripheral side of the main cylindrical portion 3, in the vicinity of the open end 3a of the main cylindrical portion 3 on the arrow B side (the right side in the drawing of FIG. 1), a flat plate-shaped syringe support 5 is provided with respect to the main cylindrical portion 3. It is provided in a brim shape, and both plate surfaces of the syringe support portion 5 are perpendicular to the directions of arrows A and B. On the inner peripheral surface 3c side of the main cylindrical portion 3, the opening end portion 3a is formed.
In the vicinity, a locking rib 3b projecting in the direction toward the axis P1 of the main cylindrical portion 3, that is, in the direction of the arrow D in the drawing is formed in an annular shape along the inner peripheral surface 3c. A funnel-shaped taper portion 6 is formed on the side of the arrow A of the main cylindrical portion 3 (on the left side in the drawing of FIG. 1) so as to be integrally continuous with the main cylindrical portion 3. The inner diameter in a cross section (that is, a circular cross section) perpendicular to the directions of arrows A and B in FIG. 6 converges in the direction of arrow A. The inside of the main cylindrical portion 3 and the taper portion 6
The interior of the syringe communicates with the directions of arrows A and B, and the space obtained by combining these interiors is defined as an internal space 2a of the syringe body 2.
【０００８】テ−パ部６の矢印Ａ側即ち、シリンジ本体
２の先端側には、図１及び、図２に示すように、ハブ挿
着部４が、該テ−パ部６に一体的に連続する形で形成さ
れており、ハブ挿着部４は弾性変形した形になってい
る。また、弾性変形したハブ挿着部４のハブ挿着孔４ｂ
には、樹脂製で、かつシリンジ１００よりも硬質のハブ
９が設けられている。ここで、弾性変形したハブ挿着部
４を説明するに当たって、まず、弾性変形していない自
然状態のハブ挿着部４及び、ハブ９を個々に説明する。
まず、弾性変形していないハブ挿着部４は、図３に示す
ように、小円筒部７を有しており、小円筒部７は、前記
テ−パ部６に一体的に連続する形で形成されている。つ
まり、ハブ挿着部４は、小円筒部７において、テ−パ部
６に一体的に連続して形成されている。小円筒部７は、
主円筒部３と同心状に形成されており、小円筒部７の内
径Ｌ１は、前記主円筒部３の内径よりも小さく形成され
ている（なお、小円筒部７の内径Ｌ１とは、該小円筒部
７の内径のうち、後述するハブ止リブ７ｄが形成されて
いない部分における内径を意味する。）。小円筒部７の
内周面７ａ側は、ハブ挿着孔４ｂとなっており、ハブ挿
着孔４ｂには、前記軸心Ｐ１に向かって突起したハブ止
リブ７ｄが形成されている。ハブ止リブ７ｄは、前記軸
心Ｐ１を中心とする円周に沿った形に、従って、円環状
に、小円筒部７の内周面７ａに沿って形成されている。
また、小円筒部７の内径のうち該ハブ止リブ７ｄの先端
７ｅにおける内径は内径Ｌ３になっており、ハブ止リブ
７ｄの矢印Ａ、Ｂ方向の幅は、幅Ｌ４となっている。な
お、ハブ止リブ７ｄの、前記軸心Ｐ１を含む平面による
断面（即ち、図３において示される断面）は円弧状にな
っている。また、小円筒部７には、該小円筒部７の外径
と等しい外径をもつ円板状に形成され、かつ表裏両壁面
が矢印Ａ、Ｂ方向に垂直に形成された端壁８が設けられ
ており、端壁８は、該端壁８の矢印Ｂ側の壁面８ｂと、
小円筒部７の矢印Ａ側の端部７ｂとが互いに接する形
で、小円筒部７と一体的に設けられている。端壁８に
は、該端壁８の表裏両壁面を矢印Ａ、Ｂ方向に貫通する
形の円形の孔８ａが、前記軸心Ｐ１を中心にして設けら
れている。なお、小円筒部７のうち、端部７ｂからハブ
止リブ７ｄまでは、矢印Ａ、Ｂ方向に距離Ｌ２となって
おり、小円筒部７のうち該距離Ｌ２に対応した部分（即
ち、円筒状の部分）は、可伸長部７ｃとなっており、小
円筒部７の内部即ち、ハブ挿着孔４ｂの内部はハブ挿着
空間４ａとなっている。弾性変形していない自然状態の
ハブ挿着部４は、以上のように構成されている。なお、
シリンジ１００は、シリンジ本体２と注射器支持部５が
一体成型される形で構成されており、シリンジ本体２
は、主円筒部３、テ−パ部６、ハブ挿着部４が一体成型
される形で構成されている。On the arrow A side of the taper portion 6, that is, on the tip end side of the syringe body 2, a hub insertion portion 4 is integrally formed with the taper portion 6 as shown in FIGS. 1 and 2. And the hub insertion portion 4 is elastically deformed. The hub insertion hole 4b of the elastically deformed hub insertion portion 4 is also included.
Is provided with a hub 9 made of resin and harder than the syringe 100. Here, in describing the hub insertion portion 4 that has been elastically deformed, first, the hub insertion portion 4 and the hub 9 in a natural state that are not elastically deformed will be individually described.
First, the hub insertion portion 4 which is not elastically deformed has a small cylindrical portion 7 as shown in FIG. 3, and the small cylindrical portion 7 is integrally formed with the taper portion 6. Is formed by. That is, the hub insertion portion 4 is formed integrally and continuously with the taper portion 6 in the small cylindrical portion 7. The small cylindrical portion 7 is
It is formed concentrically with the main cylindrical portion 3, and the inner diameter L1 of the small cylindrical portion 7 is smaller than the inner diameter of the main cylindrical portion 3 (note that the inner diameter L1 of the small cylindrical portion 7 is Of the inner diameter of the small cylindrical portion 7, it means the inner diameter of a portion where a hub stopper rib 7d described later is not formed.). A hub insertion hole 4b is formed on the inner peripheral surface 7a side of the small cylindrical portion 7, and a hub stop rib 7d protruding toward the axis P1 is formed in the hub insertion hole 4b. The hub stop rib 7d is formed along the inner circumference 7a of the small cylindrical portion 7 in a shape along the circumference centered on the axis P1 and thus in an annular shape.
Further, among the inner diameters of the small cylindrical portion 7, the inner diameter at the tip 7e of the hub stop rib 7d is the inner diameter L3, and the width of the hub stop rib 7d in the directions of arrows A and B is the width L4. The cross section (that is, the cross section shown in FIG. 3) of the hub stop rib 7d taken along a plane including the axis P1 has an arc shape. Further, the small cylindrical portion 7 is provided with an end wall 8 formed in a disk shape having an outer diameter equal to the outer diameter of the small cylindrical portion 7 and having both front and back wall surfaces formed perpendicularly to the directions of arrows A and B. The end wall 8 is provided with a wall surface 8b on the arrow B side of the end wall 8,
The small cylinder portion 7 and the end portion 7b on the arrow A side are in contact with each other, and are provided integrally with the small cylinder portion 7. The end wall 8 is provided with a circular hole 8a penetrating both the front and back wall surfaces of the end wall 8 in the directions of arrows A and B with the axis P1 as the center. It should be noted that, in the small cylindrical portion 7, the distance L2 is from the end portion 7b to the hub stop rib 7d in the directions of arrows A and B, and the portion of the small cylindrical portion 7 corresponding to the distance L2 (that is, the cylindrical portion). 2) is an expandable portion 7c, and the inside of the small cylindrical portion 7, that is, the inside of the hub insertion hole 4b is a hub insertion space 4a. The hub insertion portion 4 in a natural state that is not elastically deformed is configured as described above. In addition,
The syringe 100 is configured such that the syringe body 2 and the syringe support portion 5 are integrally molded.
The main cylindrical portion 3, the taper portion 6, and the hub insertion portion 4 are integrally molded.
【０００９】一方、ハブ９は、図２に示すように、ハブ
本体９０を有しており、ハブ本体９０には長手方向が前
記矢印Ａ、Ｂ方向に平行で、前記軸心Ｐ１を軸心とした
円柱状の主円柱部１０が設けられている。主円柱部１０
の外径Ｌ１’は、自然状態の前記小円筒部７のハブ止リ
ブ７ｄがない部分での内径Ｌ１よりも小さく、かつ前記
小円筒部７のハブ止リブ７ｄの先端７ｅにおける内径Ｌ
３よりも大きく形成されている。主円柱部１０の矢印Ａ
側（図２の紙面左側）の端面１０ａにおける外周縁側及
び、主円柱部１０の矢印Ｂ側（図２の紙面右側）の端面
１０ｂにおける外周縁側の各隅角部には、それぞれテ−
パ状の面取り部１０ｃ、１０ｄが形成されている。ま
た、主円柱部１０の外周面１０ｉ側にはハブ止溝１０ｅ
が形成されており、ハブ止溝１０ｅは、主円柱部１０の
外周側に沿って円環状に形成されている。ハブ止溝１０
ｅは、主円柱部１０の前記端面１０ａから矢印Ｂ方向に
距離Ｌ２’の位置に形成されており、距離Ｌ２’は、前
記距離Ｌ２よりもやや大きくなっている。また、ハブ止
溝１０ｅは外周面１０ｉに、矢印Ａ側及び、矢印Ｂ側の
円環状の開口端部１０ｈ、１０ｈを形成しており、矢印
Ａ、Ｂ方向における開口端部１０ｈ、１０ｈ間の幅Ｌ
４’は前記小円筒部７のハブ止リブ７ｄの幅Ｌ４よりも
狭くなっている。主円柱部１０の前記端面１０ａ側に
は、矢印Ａ、Ｂ方向に伸延した形の小円柱部１１が、該
主円柱部１０と同心状で、かつ一体的に設けられてお
り、小円柱部１１の外径は、主円柱部１０の外径Ｌ１’
よりも小さく、かつ前記シリンジ本体２の小円筒部７の
端壁８に設けられた孔８ａの内径よりもやや小さい。On the other hand, the hub 9 has a hub body 90, as shown in FIG. 2, in which the longitudinal direction of the hub body 90 is parallel to the directions of the arrows A and B, and the axis P1 is the axis center. The columnar main column portion 10 is provided. Main column part 10
Has an outer diameter L1 'smaller than the inner diameter L1 of the small cylindrical portion 7 in the portion where the hub stop rib 7d is not present, and the inner diameter L at the tip 7e of the hub stop rib 7d of the small cylindrical portion 7.
It is formed larger than three. Arrow A on the main column 10
Side (left side of the paper surface of FIG. 2) and the outer peripheral edge side of the end surface 10a, and each of the corner portions of the outer peripheral edge side of the end surface 10b of the main cylindrical portion 10 on the arrow B side (right side of the paper surface of FIG. 2) respectively.
Pa-shaped chamfered portions 10c and 10d are formed. Further, the hub stop groove 10e is provided on the outer peripheral surface 10i side of the main columnar portion 10.
The hub stop groove 10e is formed in an annular shape along the outer peripheral side of the main columnar portion 10. Hub stop groove 10
e is formed at a position of a distance L2 ′ from the end surface 10a of the main cylindrical portion 10 in the arrow B direction, and the distance L2 ′ is slightly larger than the distance L2. Further, the hub stop groove 10e is formed with annular opening ends 10h and 10h on the arrow A side and the arrow B side on the outer peripheral surface 10i, and between the opening ends 10h and 10h in the arrow A and B directions. Width L
4'is narrower than the width L4 of the hub stop rib 7d of the small cylindrical portion 7. On the end face 10a side of the main columnar part 10, a small columnar part 11 extending in the directions of arrows A and B is provided concentrically with and integrally with the main columnar part 10. The outer diameter of 11 is the outer diameter L1 ′ of the main cylindrical portion 10.
And is slightly smaller than the inner diameter of the hole 8a provided in the end wall 8 of the small cylindrical portion 7 of the syringe body 2.
【００１０】また、ハブ９には、図２に示すように、針
挿入孔１２が設けられており、針挿入孔１２は、第一テ
−パ孔１３、第一円柱孔１５、第二テ−パ孔１６、第二
円柱孔１７より構成されている。第一テ−パ孔１３は、
ハブ９のうち小円柱部１１の矢印Ａ側（図２の紙面左
側）の端面１１ａに前記軸心Ｐ１を中心とした円形の開
口部１３ａを形成すると共に、該端面１１ａより矢印Ｂ
方向に向かって形成されており、第一テ−パ孔１３の矢
印Ａ、Ｂ方向に垂直な断面（即ち、前記軸心Ｐ１を中心
とした円形断面）の径は、矢印Ｂ方向に向かって収斂し
ている。ハブ９には、第一テ−パ孔１３の矢印Ｂ側（図
２の紙面右側）において、該第一テ−パ孔１３に連続し
た形で、前記軸心Ｐ１を中心とした円柱状の第一円柱孔
１５が設けられている。更に、ハブ９には、第一円柱孔
１５の矢印Ｂ側には、該第一円柱孔１５に連続した形
で、第二テ−パ孔１６が矢印Ｂ方向に設けられており、
第二テ−パ孔１６の矢印Ａ、Ｂ方向に垂直な断面（即
ち、前記軸心Ｐ１を中心とした円形断面）の径は、矢印
Ｂ方向に向かって収斂している。更に、ハブ９には、第
二テ−パ孔１６の矢印Ｂ側において、該第二テ−パ孔１
６に連続した形で、前記軸心Ｐ１を中心とした円柱状の
第二円柱孔１７が設けられており、第二円柱孔１７の矢
印Ｂ側の端部１７ａは、前記主円柱部１０内部に達して
いる。また、第二円柱孔１７の端部１７ａは、矢印Ａ、
Ｂ方向に垂直な壁面１０ｆに接している。Further, the hub 9 is provided with a needle insertion hole 12 as shown in FIG. 2, and the needle insertion hole 12 includes a first taper hole 13, a first cylindrical hole 15, and a second taper hole. It is composed of a hole 16 and a second cylindrical hole 17. The first taper hole 13 is
A circular opening 13a centered on the axis P1 is formed on the end surface 11a of the small column portion 11 of the hub 9 on the arrow A side (left side of the drawing sheet of FIG. 2), and the arrow B extends from the end surface 11a.
Direction, and the diameter of the cross section of the first taper hole 13 perpendicular to the arrows A and B directions (that is, the circular cross section around the axis P1) has the diameter toward the arrow B direction. Converged. The hub 9 has a cylindrical shape centered on the axis P1 in a shape continuous with the first taper hole 13 on the arrow B side of the first taper hole 13 (on the right side in the drawing of FIG. 2). A first cylindrical hole 15 is provided. Further, in the hub 9, a second taper hole 16 is provided in the direction of arrow B on the arrow B side of the first cylindrical hole 15 so as to be continuous with the first cylindrical hole 15.
The diameter of the cross section of the second taper hole 16 perpendicular to the directions of the arrows A and B (that is, the circular cross section around the axis P1) converges in the direction of the arrow B. Further, in the hub 9, the second taper hole 1 is provided on the side of the second taper hole 16 on the arrow B side.
6 is provided with a cylindrical second cylindrical hole 17 centered on the axis P1 and the end portion 17a of the second cylindrical hole 17 on the arrow B side is inside the main cylindrical portion 10. Has reached. The end 17a of the second cylindrical hole 17 has an arrow A,
It is in contact with the wall surface 10f perpendicular to the B direction.
【００１１】一方、ハブ９の主円柱部１０には、前記針
挿入孔１２の第二円柱孔１７の矢印Ｂ側（図２の紙面右
側）に隣接する形で、流通孔１９が設けられており、流
通孔１９は、前記軸心Ｐ１を中心とし、第二円柱孔１７
の径よりも径の小さな円柱状に設けられている。また、
流通孔１９は、主円柱部１０の前記壁面１０ｆに円形の
開口部１９ａを形成する形で、前記針挿入孔１２の第二
円柱孔１７と連通して設けられている。更に、ハブ９の
主円柱部１０には、前記流通孔１９の矢印Ｂ側（図２の
紙面右側）に隣接する形で、ピストン係合孔２０が設け
られており、ピストン係合孔２０は、第一テ−パ孔２
１、円柱孔２２、第二テ−パ孔２３、第三テ−パ孔２５
より構成されている。第一テ−パ孔２１は、ハブ９の主
円柱部１０において、前記流通孔１９の矢印Ｂ側（図２
の紙面右側）に隣接する形で設けられている。第一テ−
パ孔２１の矢印Ａ、Ｂ方向に垂直な断面は、前記軸心Ｐ
１を中心とした円形断面となっており、第一テ−パ孔２
１の断面の径は矢印Ｂ方向に向かって拡大している。第
一テ−パ孔２１の矢印Ａ側の円形の端部２１ａの径は、
前記流通孔１９の径よりも大きくなっており、従って、
端部２１ａは、矢印Ａ、Ｂ方向に垂直な壁面１０ｇに接
している。なお、該壁面１０ｇには、前記流通孔１９に
よる、円形の開口部１９ｂが形成されており、第一テ−
パ孔２１と流通孔１９とは、該開口部１９ｂを通して互
いに連通している。第一テ−パ孔２１の矢印Ｂ側には、
該第一テ−パ孔２１に連続した形で、前記軸心Ｐ１を中
心とした円柱状の円柱孔２２が設けられており、円柱孔
２２の矢印Ｂ側には、該円柱孔２２に連続した形で、矢
印Ａ、Ｂ方向に垂直な断面（即ち、前記軸心Ｐ１を中心
とした円形断面）の径が矢印Ｂ方向に向かって収斂した
形の第二テ−パ孔２３が矢印Ｂ方向に設けられている。
第二テ−パ孔２３の矢印Ｂ側には、該第二テ−パ孔２３
に連続した形で、第三テ−パ孔２５が矢印Ｂ方向に設け
られており、第三テ−パ孔２５の矢印Ａ、Ｂ方向に垂直
な断面（即ち、前記軸心Ｐ２を中心とした円形断面）の
径は、矢印Ｂ方向に向かって拡大している。よって、主
円柱部１０のうち、第二テ−パ孔２３に面した壁面２３
ｂと、第三テ−パ孔２５に面した壁面２５ａとによって
挾まれた部分は、第二テ−パ孔２３と第三テ−パ孔２５
との境界部２３ａを頂点とした形で軸心Ｐ１に向かって
突出した突出部２５ｂを形成している。また、第三テ−
パ孔２５の矢印Ｂ側は、ハブ９の主円柱部１０の端面１
０ｂに円形の開口部２５ｃを形成する形で外部に開口し
ている。On the other hand, the main cylindrical portion 10 of the hub 9 is provided with a flow hole 19 adjacent to the second cylindrical hole 17 of the needle insertion hole 12 on the arrow B side (on the right side in the drawing of FIG. 2). The circulation hole 19 has the second cylindrical hole 17 with the axis P1 as the center.
It is provided in a cylindrical shape having a diameter smaller than the diameter of. Also,
The flow hole 19 is provided in communication with the second cylindrical hole 17 of the needle insertion hole 12 so as to form a circular opening 19a in the wall surface 10f of the main cylindrical portion 10. Further, the main cylinder portion 10 of the hub 9 is provided with a piston engagement hole 20 adjacent to the arrow B side (the right side of the drawing in FIG. 2) of the circulation hole 19, and the piston engagement hole 20 is , First taper hole 2
1, cylindrical hole 22, second taper hole 23, third taper hole 25
It is composed of The first taper hole 21 is provided on the main column portion 10 of the hub 9 on the arrow B side of the flow hole 19 (see FIG. 2).
The right side of the paper) is provided adjacent to. First te
The cross section of the hole 21 perpendicular to the directions of arrows A and B has the axis P
1 has a circular cross section, and the first taper hole 2
The diameter of the cross section of No. 1 increases in the direction of arrow B. The diameter of the circular end portion 21a of the first taper hole 21 on the arrow A side is
It is larger than the diameter of the flow hole 19, and
The end 21a is in contact with a wall surface 10g perpendicular to the directions of arrows A and B. A circular opening 19b is formed in the wall surface 10g by the circulation hole 19, and the first tape is formed.
The through hole 21 and the through hole 19 communicate with each other through the opening 19b. On the arrow B side of the first taper hole 21,
A cylindrical columnar hole 22 is provided so as to be continuous with the first taper hole 21 and centered on the axis P1. The cylindrical hole 22 is continuous with the cylindrical hole 22 on the arrow B side. In addition, the second taper hole 23 having a shape in which the diameter of the cross section perpendicular to the directions of the arrows A and B (that is, the circular cross section around the axis P1) converges in the direction of the arrow B is indicated by the arrow B. It is provided in the direction.
The second taper hole 23 is provided on the arrow B side of the second taper hole 23.
A third taper hole 25 is provided in the direction of the arrow B in a continuous form, and a cross section of the third taper hole 25 perpendicular to the directions of the arrows A and B (that is, centering around the axis P2). The circular cross section) has a diameter that increases in the direction of arrow B. Therefore, in the main cylindrical portion 10, the wall surface 23 facing the second taper hole 23
The portion sandwiched by b and the wall surface 25a facing the third taper hole 25 is the second taper hole 23 and the third taper hole 25.
A projecting portion 25b projecting toward the axial center P1 is formed with the boundary portion 23a between and as the apex. Also, the third table
The arrow B side of the hole 25 is the end surface 1 of the main cylindrical portion 10 of the hub 9.
It is opened to the outside in the form of forming a circular opening 25c at 0b.
【００１２】自然状態のハブ挿着部４及び、ハブ９は以
上のように構成されており、ハブ挿着部４は次のように
弾性変形し、ハブ９は次のようにハブ挿着部４のハブ挿
着孔４ｂに設けられている。即ち、ハブ挿着部４は、図
２及び、図４に示すように、ハブ止リブ７ｄ及び、小円
筒部７におけるハブ止リブ７ｄ付近において、図の矢印
Ｃ方向即ち、軸心Ｐ１に対する遠心方向に膨張する形で
弾性変形していると共に、小円筒部７のうちの前記可伸
長部７ｃが矢印Ａ、Ｂ方向に伸長する形で弾性変形して
いる。一方、ハブ９は、該ハブ９の主円柱部１０をハブ
挿着部４のハブ挿着空間４ａに挿入し、該ハブ９の小円
柱部１１を端壁８の孔８ａに貫通挿入させた形で設けら
れており、ハブ９は、該ハブ９の主円柱部１０の端面１
０ａを、端壁８の矢印Ｂ側（図２の紙面右側）の壁面８
ｂに密接させた形で設けられている（なお、端面１０ａ
と壁面８ｂは、本実施例のように必ずしも密着している
必要は無く、多少の間隙が形成されていてもよい。）。
また、ハブ９は、小円筒部７のハブ止リブ７ｄの位置
と、該ハブ９のハブ止溝１０ｅとの位置が、矢印Ａ、Ｂ
方向において互いに整合された形で設けられている。つ
まり、小円筒部７の可伸長部７ｃは、小円筒部７の端部
７ｂからハブ止リブ７ｄの中心までの距離が、自然状態
における距離Ｌ２より伸長して距離Ｌ２’（即ち、ハブ
９における端面１０ａからハブ止溝１０ｅの中心までの
距離Ｌ２’と等しい距離）になる形で矢印Ａ、Ｂ方向に
伸長している。また、ハブ９は、ハブ止リブ７ｄが該ハ
ブ９に当接する形で設けられていると共に、該ハブ止リ
ブ７ｄの先端７ｅ側が、該ハブ止リブ７ｄと整合対応し
た位置に存在するハブ止溝１０ｅに、軸心Ｐ１に対する
向心方向（即ち、矢印Ｃ方向の逆方向）である図の矢印
Ｄ方向に、挿入する形で存在している。また、ハブ止リ
ブ７ｄの幅Ｌ４は、上述したように、ハブ止溝１０ｅの
幅Ｌ４’よりも広いので、ハブ止リブ７ｄは、図４に示
すように、先端７ｅの矢印Ａ側及び、矢印Ｂ側のシ−ル
部７ｇ、７ｇにおいて、ハブ止溝１０ｅの矢印Ａ、Ｂ両
側の開口端部１０ｈ、１０ｈと当接している。つまり、
ハブ挿着部４は、小円筒部７の内径のうちシ−ル部７ｇ
における内径が、ハブ９の外径Ｌ１と略等しくなる形で
膨張している。また、ハブ９の主円柱部１０の端面１０
ｂは、ハブ挿着空間４ａと前記内部空間２ａとの境界付
近（即ち、小円筒部７の内部とテ−パ部６の内部との境
界付近）に位置している。なお、矢印Ｃ方向に膨張して
いる小円筒部７のハブ止リブ７ｄ以外での内径は、少な
くとも自然状態における内径Ｌ１より大きく、ハブ９の
主円柱部１０の外径Ｌ１’よりも大きい。よって、小円
筒部７の内周面７ａは、ハブ止リブ７ｄ以外では、ハブ
９の外周面１０ｉと接触せず、内周面７ａと外周面１０
ｉとの間には隙間空間４９が形成される。なお、ハブ９
はシリンジ１００よりも硬い材質で構成されているた
め、シリンジ１００に比べて弾性変形しにくく、また、
ハブ９は円柱状に形成された構造上、円筒状に形成され
たシリンジ本体２に比べて弾性変形しにくい。よって、
ハブ９の弾性変形は、シリンジ１００に比べて小さい。The hub insertion portion 4 and the hub 9 in the natural state are configured as described above. The hub insertion portion 4 is elastically deformed as follows, and the hub 9 is the hub insertion portion as described below. 4 hub insertion holes 4b. That is, as shown in FIGS. 2 and 4, the hub insertion portion 4 has a centrifugal force relative to the hub stop rib 7d and the hub stop rib 7d of the small cylindrical portion 7 in the direction of the arrow C in the figure, that is, the centrifugal force with respect to the axis P1. The expandable portion 7c of the small cylindrical portion 7 is elastically deformed by expanding in the direction, and is elastically deformed by expanding in the directions of arrows A and B. On the other hand, in the hub 9, the main cylindrical portion 10 of the hub 9 is inserted into the hub insertion space 4a of the hub insertion portion 4, and the small cylindrical portion 11 of the hub 9 is inserted through the hole 8a of the end wall 8. And the hub 9 has an end surface 1 of the main cylindrical portion 10 of the hub 9.
0a is a wall surface 8 on the arrow B side of the end wall 8 (on the right side in the drawing of FIG. 2).
It is provided so as to be in close contact with b (the end face 10a
The wall surface 8b and the wall surface 8b do not necessarily have to be in close contact with each other as in this embodiment, and some gap may be formed. ).
Further, in the hub 9, the position of the hub stop rib 7d of the small cylindrical portion 7 and the position of the hub stop groove 10e of the hub 9 are indicated by arrows A and B.
They are provided in a form aligned with each other in the direction. That is, in the extendable portion 7c of the small cylindrical portion 7, the distance from the end portion 7b of the small cylindrical portion 7 to the center of the hub stop rib 7d is extended from the distance L2 in the natural state to a distance L2 '(that is, the hub 9). The distance from the end face 10a to the center of the hub stop groove 10e is equal to the distance L2 ') and extends in the directions of arrows A and B. Further, the hub 9 is provided such that the hub stop rib 7d is in contact with the hub 9, and the tip 7e side of the hub stop rib 7d is present at a position corresponding to the hub stop rib 7d. The groove 10e is inserted in the groove 10e in the direction of the arrow D in the drawing, which is the direction of the axis P1 (that is, the direction opposite to the arrow C). In addition, since the width L4 of the hub stop rib 7d is wider than the width L4 'of the hub stop groove 10e as described above, the hub stop rib 7d is, as shown in FIG. The seal portions 7g, 7g on the arrow B side are in contact with the open end portions 10h, 10h on both sides of the arrow A, B of the hub stop groove 10e. That is,
The hub insertion portion 4 includes a seal portion 7g of the inner diameter of the small cylindrical portion 7.
The inner diameter of the hub 9 is expanded to be substantially equal to the outer diameter L1 of the hub 9. In addition, the end surface 10 of the main cylindrical portion 10 of the hub 9
b is located near the boundary between the hub insertion space 4a and the internal space 2a (that is, near the boundary between the inside of the small cylindrical portion 7 and the inside of the taper portion 6). The inner diameter of the small cylindrical portion 7 expanding in the arrow C direction other than the hub stop rib 7d is at least larger than the inner diameter L1 in the natural state and larger than the outer diameter L1 ′ of the main cylindrical portion 10 of the hub 9. Therefore, the inner peripheral surface 7a of the small cylindrical portion 7 does not contact the outer peripheral surface 10i of the hub 9 except the hub stop rib 7d, and the inner peripheral surface 7a and the outer peripheral surface 10a.
A gap space 49 is formed between i and i. The hub 9
Is made of a material that is harder than the syringe 100, and is less likely to be elastically deformed than the syringe 100.
The hub 9 is less likely to be elastically deformed than the cylindrical syringe body 2 because of its cylindrical structure. Therefore,
The elastic deformation of the hub 9 is smaller than that of the syringe 100.
【００１３】ところで、小円筒部７の可伸長部７ｃは、
矢印Ａ、Ｂ方向に弾性変形により伸長しているので、可
伸長部７ｃは、該可伸長部７ｃと一体的に設けられてい
る端壁８を介して、図４に示すように、ハブ９の主円筒
部１０に、端面１０ａより矢印Ｂ方向の復元力Ｆａを与
えている。従って、ハブ９の主円筒部１０は、端面１０
ａにおいて、該復元力Ｆａに対する反力Ｆａ’を矢印Ａ
方向に端壁８に対して与えている。また、可伸長部７ｃ
は、該可伸長部７ｃと一体的に設けられているハブ止リ
ブ７ｄに、矢印Ａ方向の復元力Ｆｂを与えている。な
お、復元力Ｆａと復元力Ｆｂの大きさは等しい。また、
ハブ止リブ７ｄ及び、ハブ止リブ７ｄ付近は、矢印Ｃ方
向に弾性変形により膨張しているので、ハブ止リブ７ｄ
には矢印Ｄ方向の復元力Ｆｃが加えられている。つま
り、ハブ止リブ７ｄには、復元力Ｆｂ、Ｆｃによる所定
の復元力Ｆｂｃが、軸心Ｐ１に向かう方向で、かつ矢印
Ａ方向寄りの方向に作用しており、復元力Ｆｂｃによっ
て、ハブ９とハブ止リブ７ｄとの矢印Ａ側及び、矢印Ｂ
側の当接箇所（即ち、矢印Ａ側及び、矢印Ｂ側における
各開口端部１０ｈと各シ−ル部７ｄ）では、互いにシ−
ル圧Ｆｄ、Ｆｄ及び、シ−ル圧Ｆｅ、Ｆｅを加え合う形
で、従って、該当接箇所がシ−ルされる形で釣り合って
いる。よって、小円筒部７の端壁８の壁面８ｂとハブ９
の端面１０ａとの間及び、ハブ止リブ７ｄの矢印Ａ側、
矢印Ｂ側の各シ−ル部７ｇ、７ｇとハブ９の矢印Ａ側、
矢印Ｂ側の各開口端部１０ｈ、１０ｈとの間はシ−ルさ
れており、水密状態（或いは、気密状態）になっている
（なお、壁面８ｂとハブ９の端面１０ａとの間に間隙が
存在する場合には、復元力Ｆａ、Ｆｂがなくなり、ハブ
止リブ７ｄと開口端部１０ｈ、１０ｈの間のみがシ−ル
されることになる。）。なお、復元力Ｆａ、Ｆｂ、Ｆｃ
或いは、これら復元力Ｆａ、Ｆｂ、Ｆｃによる復元力Ｆ
ｂｃは、ハブ挿入部４の材質或いは、小円筒部７の肉厚
或いは、ハブ止リブ７ｄとハブ止溝１０ｅとの位置等に
よって、予め所望の大きさに設定できる。By the way, the expandable portion 7c of the small cylindrical portion 7 is
Since it extends in the directions of arrows A and B by elastic deformation, the extendable portion 7c is connected to the hub 9 through the end wall 8 provided integrally with the extendable portion 7c as shown in FIG. Restoring force Fa in the direction of arrow B is applied to the main cylindrical portion 10 from the end surface 10a. Therefore, the main cylindrical portion 10 of the hub 9 has the end face 10
At a, the reaction force Fa ′ against the restoring force Fa is indicated by the arrow A
Direction is given to the end wall 8. In addition, the extendable portion 7c
Applies a restoring force Fb in the direction of arrow A to the hub stop rib 7d provided integrally with the extendable portion 7c. The restoring force Fa and the restoring force Fb are equal in magnitude. Also,
Since the hub stop rib 7d and the vicinity of the hub stop rib 7d are expanded by elastic deformation in the direction of arrow C, the hub stop rib 7d
Is applied with a restoring force Fc in the direction of arrow D. That is, a predetermined restoring force Fbc due to the restoring forces Fb and Fc acts on the hub stop rib 7d in the direction toward the axis P1 and in the direction toward the arrow A direction, and the restoring force Fbc causes the hub 9 to move. And hub stop rib 7d on the arrow A side and arrow B
Side contact points (that is, the open end portions 10h and the seal portions 7d on the arrow A side and the arrow B side) are sealed to each other.
The balance pressures Fd and Fd and the seal pressures Fe and Fe are added to each other, so that the contact points are sealed. Therefore, the wall surface 8b of the end wall 8 of the small cylindrical portion 7 and the hub 9
Between the end surface 10a and the hub stop rib 7d on the arrow A side,
Each seal portion 7g, 7g on the arrow B side and the arrow A side of the hub 9,
There is a seal between each of the opening ends 10h and 10h on the arrow B side, which is a watertight state (or an airtight state) (note that there is a gap between the wall surface 8b and the end surface 10a of the hub 9). Is present, the restoring forces Fa and Fb are lost, and only the portion between the hub stop rib 7d and the open ends 10h and 10h is sealed.). The restoring forces Fa, Fb, Fc
Alternatively, the restoring force F due to these restoring forces Fa, Fb, Fc
The bc can be set to a desired size in advance depending on the material of the hub insertion portion 4, the thickness of the small cylindrical portion 7, the positions of the hub stop rib 7d and the hub stop groove 10e, and the like.
【００１４】ハブ挿着部４は以上のように弾性変形し、
ハブ９は以上のようにハブ挿着部４に設けられている。
一方、ハブ９の針挿入孔１２には、図１及び図２に示す
ように、注射針２６が挿入されていおり、注射針２６
は、先端２６ａ側がシリンジ本体２の外部側に位置し、
後端部２６ｂ側より針挿入孔１２に挿入されている。ま
た、注射針２６の後端２６ｂは、針挿入孔１２の矢印Ｂ
側に形成された前記壁面１０ｆに当接しており、注射針
２６の先端２６ａから後端２６ｂ側に貫通されて設けら
れた媒体流通孔２６ｃの、後端２６ｂにおける開口部２
６ｄと、壁面１０ｆに形成された前記流通孔１９の開口
部１９ａとは互いに整合されている。つまり、媒体流通
孔２６ｃと流通孔１９とは、開口部２６ｄ、１９ａを介
して、矢印Ａ、Ｂ方向に連通している。また、針挿入孔
１２のうち、注射針２６とハブ９との間の空間には、接
着剤２７が充填され固結している。The hub insertion portion 4 is elastically deformed as described above,
The hub 9 is provided on the hub insertion portion 4 as described above.
On the other hand, an injection needle 26 is inserted into the needle insertion hole 12 of the hub 9 as shown in FIGS.
The tip 26a side is located outside the syringe body 2,
It is inserted into the needle insertion hole 12 from the rear end portion 26b side. Further, the rear end 26b of the injection needle 26 is provided with an arrow B of the needle insertion hole 12.
The opening 2 at the rear end 26b of the medium circulation hole 26c, which is in contact with the wall surface 10f formed on the side and penetrates from the front end 26a of the injection needle 26 toward the rear end 26b.
6d and the opening 19a of the through hole 19 formed in the wall surface 10f are aligned with each other. That is, the medium circulation hole 26c and the circulation hole 19 communicate with each other in the directions of arrows A and B via the openings 26d and 19a. Further, in the needle insertion hole 12, a space between the injection needle 26 and the hub 9 is filled with an adhesive 27 and solidified.
【００１５】注射器１には、図１に示すように、ピスト
ン２９が設けられている（なお、図１は、注射器１の模
式断面図であるが、ピストン２９のうち、後述するピス
トン本体３０、外押圧板３２、内押圧板３３について
は、便宜上、断面でなく側面を示している。）。ピスト
ン２９は、矢印Ａ、Ｂ方向に伸延した棒状のピストン本
体３０を有しており、ピストン本体３０は、矢印Ａ、Ｂ
方向に偏長な長方形板状の２つの合同な平板部３０ａ
が、断面が十字状を成す形で一体的に交差して設けられ
ている。平板部３０ａの板面の矢印Ａ、Ｂ方向に垂直な
幅は、前記主円筒部３のうちの係止リブ３ｂにおける内
径に略等しく、ピストン本体３０は、該ピストン本体３
０の矢印Ａ側より、主円筒部３に、開口端部３ａを通し
て挿入された形で設けられている。ピストン本体３０の
各平板部３０ａには、矢印Ａ側寄りにおいて、各平板部
３０ａの両側部３０ｂ、３０ｂよりピストン本体の軸心
（即ち、軸心Ｐ１）方向に楔形の切欠き３１が設けられ
ている。４ヵ所の切欠き３１は、矢印Ａ、Ｂ方向におい
て互いに整合した位置に設けられている。また、ピスト
ン本体３０の矢印Ｂ側の端部側には、板面が矢印Ａ、Ｂ
方向に垂直な円形板状の外押圧板３２がピストン本体３
０と一体的に、かつ同心状に設けられており、外押圧板
３２の径は、主円筒部３の内径よりも充分に大きく設け
られている。ピストン本体３０の矢印Ａ側の端部側に
は、図１及び、図５に示すように、板面が矢印Ａ、Ｂ方
向に垂直な円形板状の内押圧板３３がピストン本体３０
と一体的に、かつ同心状に設けられており（従って、内
押圧板３３は主円筒部３の内部に位置しており）、内押
圧板３３の径は、前記主円筒部３の内径に略等しくなっ
ている（従って、内押圧板３３の径は、主円筒部３のう
ちの係止リブ３ｂにおける内径よりも大きい。）。内押
圧板３３には、図１及び、図５に示すように、矢印Ａ側
にパッキン支持部３５が設けられており、パッキン支持
部３５には、矢印Ａ、Ｂ方向に伸延した円柱状の円柱部
３５ａが、内押圧板３３と同心状に設けられている。円
柱部３５ａの径は、内押圧板３３の径よりも小さくなっ
ており、円柱部３５ａは、内押圧板３３の矢印Ａ側に、
内押圧板３３と一体的に設けられている。円柱部３５ａ
の矢印Ａ側には、板面が矢印Ａ、Ｂ方向に垂直な円形板
状の円板部３５ｂが、円柱部３５ａと同心状に、かつ一
体的に設けられており、円板部３５ｂの径は、円柱部３
５ａより大きく内押圧板３３より小さくなっている。更
に、円板部３５ｂの矢印Ａ側にはハブ係合部３６が設け
られており、ハブ係合部３６には、矢印Ａ、Ｂ方向に伸
延した円柱状の円柱部３６ａが、円板部３５ｂと同心状
に設けられている。円柱部３６ａの径は、円板部３５ｂ
の径よりも小さくなっており、円柱部３６ａは、円板部
３５ｂの矢印Ａ側に、円板部３５ｂと一体的に設けられ
ている。円柱部３６ａの矢印Ａ側には径が円柱部３６ａ
より大きな半球状の挿入部３６ｂが、球面３６ｃ側を矢
印Ａ側に向ける形で円柱部３６ａと一体的に設けられて
いる。なお、円柱部３６ａの径は、前記ハブ９に設けら
れたピストン係合孔２０の第二テ−パ孔２３と第三テ−
パ孔２５との境界部２３ａにおける内径に略等しくなっ
ており、挿入部３６ｂの径は、前記ピストン係合孔２０
の円柱孔２２の内径よりも小さくなっている。一方、パ
ッキン支持部３５には、可撓性のある樹脂からなるパッ
キン３７が支持されて設けられており、パッキン３７
は、矢印Ａ、Ｂ方向に伸延した円柱部３９と、該円柱部
３９の矢印Ａ側に連続する形の、該円柱部３９と一体的
なテ−パ部４０とによって構成されている。なお、テ−
パ部４０の外径は、矢印Ａ方向に向かって収斂してお
り、テ−パ部４０の形状は、前記シリンジ本体２のテ−
パ部６の内部に自然状態で整合して挿入し得る形になっ
ている。パッキン３７には、円柱部３９の矢印Ｂ側の端
面３９ａ側より矢印Ａ方向に、前記パッキン支持部３５
の円柱部３５ａと、径が同じで、かつ矢印Ａ、Ｂ方向の
長さが同じ第一孔４１が円柱部３９と同心状に設けられ
ており、更に、パッキン３７には、第一孔４１の矢印Ａ
側に連続して、前記パッキン支持部３５の円板部３５ｂ
と、径が同じで、かつ矢印Ａ、Ｂ方向の長さが同じ第二
孔４２が円柱部３９と同心状に設けられている。また、
パッキン３７には、第二孔４２の矢印Ａ側に連続して、
前記ハブ係合部３６の挿入部３６ｂの矢印Ａ、Ｂ方向に
垂直な断面による外径と径が同じで、かつ前記ハブ係合
部３６の円柱部３６ａと矢印Ａ、Ｂ方向の長さが同じ第
三孔４３が円柱部３９と同心状に設けられており、第三
孔４３は、パッキン３７のテ−パ部４０側において矢印
Ａ方向に開孔している。つまり、パッキン３７は、第三
孔４３にハブ係合部３６の円柱部３６ａを貫通させ、第
二孔４２にパッキン支持部３５の円板部３５ｂを挿入
し、第一孔４１にパッキン支持部３５の円柱部３５ａを
貫通させる形で、パッキン支持部３５に係合して設けら
れている。なお、パッキン３７のテ−パ部４０が前記シ
リンジ本体２のテ−パ部６の内部に自然状態において整
合し挿入した状態では、図５に示すように、該パッキン
３７を係合しているパッキン支持部３５の矢印Ａ側のハ
ブ係合部３６の挿入部３６ｂの球面３６ｃが、前記ピス
トン係合孔２０の第三テ−パ孔２３に面した壁面２３ｂ
に接した状態になるように、パッキン３７の形状が設定
されている。なお、パッキン３７の円柱部３９の径は、
前記内押圧板３３と略同径になっているが、パッキン３
７の円柱部３９の外周側には、該円柱部３９の外周に沿
った形の円環状のヒダ４５が、矢印Ａ、Ｂ方向に並んで
二重に形成されている。従って、パッキン３７のうち円
柱部３９及び、ヒダ４５は、軸心Ｐ１に向かう方向（即
ち、矢印Ｄ方向）に弾性変形による縮小をする形で、シ
リンジ本体２の主円筒部３に挿入している。つまり、パ
ッキン３７の円柱部３９及び、ヒダ４５は、軸心にから
遠ざかる方向（即ち、矢印Ｃ方向）の力で主円筒部３の
内周面３ｃを押圧しており、パッキン３７と主円筒部３
との間は、水封（或いは、気封）にシ−ルされている。
また、パッキン３７の円柱部３９は、パッキン３７の第
一孔４１及び、第二孔４２側に、第一孔４１及び、第二
孔４２の径を縮小させようとする形の力を及ぼしている
ので、第一孔４１及び、第二孔４２に挿入された前記パ
ッキン支持部３５とパッキン３７との間は押圧密着され
ており、パッキン３７とパッキン支持部３５との間は、
水封（或いは、気封）にシ−ルされている。また、シリ
ンジ本体２の主円筒部３の内周面３ｃは滑らかに形成さ
れており、従って、パッキン３７が挿着されたピストン
２９は、主円筒部３の内部空間２ａにおいて矢印Ａ、Ｂ
方向に摺動移動自在になっている。As shown in FIG. 1, the syringe 1 is provided with a piston 29 (note that FIG. 1 is a schematic cross-sectional view of the syringe 1; For convenience, the outer pressing plate 32 and the inner pressing plate 33 are shown not on the cross section but on the side surface. The piston 29 has a rod-shaped piston body 30 extending in the directions of arrows A and B, and the piston body 30 has arrows A and B.
Two congruent flat plate portions 30a in the shape of a rectangular plate that is oblong in the direction
However, they are provided so as to integrally cross each other in a cross-shaped cross section. The width of the plate surface of the flat plate portion 30a perpendicular to the directions of arrows A and B is substantially equal to the inner diameter of the locking rib 3b of the main cylindrical portion 3, and the piston body 30 is
It is provided so as to be inserted into the main cylindrical portion 3 through the opening end portion 3a from the arrow A side of 0. Each flat plate portion 30a of the piston main body 30 is provided with a wedge-shaped notch 31 in the axial direction (that is, the axial center P1) of the piston main body from both side portions 30b, 30b of the flat plate portion 30a toward the arrow A side. ing. The four notches 31 are provided at positions aligned with each other in the directions of arrows A and B. On the side of the end portion of the piston body 30 on the arrow B side, the plate surfaces are indicated by arrows A and B.
The outer pressing plate 32 in the shape of a circular plate perpendicular to the direction is the piston body 3
The outer pressing plate 32 has a diameter that is sufficiently larger than the inner diameter of the main cylindrical portion 3. As shown in FIGS. 1 and 5, a circular plate-shaped inner pressing plate 33 having a plate surface perpendicular to the directions of arrows A and B is provided on the end portion of the piston body 30 on the arrow A side.
And the inner pressing plate 33 is located concentrically with each other (therefore, the inner pressing plate 33 is located inside the main cylindrical portion 3), and the diameter of the inner pressing plate 33 is equal to the inner diameter of the main cylindrical portion 3. The diameters of the inner pressing plates 33 are substantially equal to each other (thus, the diameter is larger than the inner diameter of the locking rib 3b of the main cylindrical portion 3). As shown in FIGS. 1 and 5, the inner pressing plate 33 is provided with a packing support portion 35 on the arrow A side, and the packing support portion 35 has a columnar shape extending in the directions A and B. The columnar portion 35a is provided concentrically with the inner pressing plate 33. The diameter of the columnar portion 35a is smaller than the diameter of the inner pressing plate 33, and the columnar portion 35a is located on the arrow A side of the inner pressing plate 33.
It is provided integrally with the inner pressing plate 33. Column portion 35a
On the arrow A side of, a circular plate-shaped disc portion 35b having a plate surface perpendicular to the directions of the arrows A and B is provided concentrically and integrally with the column portion 35a. Diameter is cylindrical part 3
It is larger than 5a and smaller than the inner pressing plate 33. Further, a hub engaging portion 36 is provided on the arrow A side of the disc portion 35b, and the hub engaging portion 36 has a cylindrical column portion 36a extending in the directions of the arrows A and B and a disc portion. It is provided concentrically with 35b. The diameter of the cylindrical portion 36a is equal to that of the disc portion 35b.
The diameter of the columnar portion 36a is smaller than that of the disc portion 35a, and the columnar portion 36a is provided integrally with the disc portion 35b on the arrow A side of the disc portion 35b. The diameter of the columnar portion 36a is on the arrow A side of the columnar portion 36a.
A larger hemispherical insertion portion 36b is provided integrally with the cylindrical portion 36a with the spherical surface 36c side facing the arrow A side. The diameter of the cylindrical portion 36a is the same as that of the second taper hole 23 and the third taper hole of the piston engagement hole 20 provided in the hub 9.
The diameter of the insertion portion 36b is substantially equal to the inner diameter of the boundary portion 23a with the pad hole 25, and the diameter of the insertion portion 36b is the same as that of the piston engagement hole 20.
Is smaller than the inner diameter of the cylindrical hole 22. On the other hand, the packing support portion 35 is provided with a packing 37 made of a flexible resin so as to be supported.
Comprises a columnar portion 39 extending in the directions of arrows A and B, and a taper portion 40 which is continuous with the columnar portion 39 on the arrow A side and which is integral with the columnar portion 39. In addition,
The outer diameter of the taper portion 40 converges in the direction of arrow A, and the shape of the taper portion 40 is the taper of the syringe body 2.
It is shaped so that it can be naturally inserted into the inside of the pad 6 in alignment. In the packing 37, the packing support portion 35 is provided in the direction of the arrow A from the end surface 39a side of the columnar portion 39 on the arrow B side.
The first hole 41 having the same diameter as that of the columnar portion 35a and the same length in the directions of the arrows A and B is concentrically provided with the columnar portion 39a. Further, the packing 37 has the first hole 41a. Arrow A
The disk portion 35b of the packing support portion 35 continuously to the side.
A second hole 42 having the same diameter and the same length in the directions of arrows A and B is provided concentrically with the columnar portion 39. Also,
In the packing 37, continuously on the arrow A side of the second hole 42,
The insertion portion 36b of the hub engaging portion 36 has the same outer diameter and the same diameter as the cross section perpendicular to the arrow A and B directions, and the length of the cylindrical portion 36a of the hub engaging portion 36 in the arrow A and B directions is the same. The same third hole 43 is provided concentrically with the columnar portion 39, and the third hole 43 is opened in the direction of arrow A on the taper portion 40 side of the packing 37. That is, in the packing 37, the cylindrical portion 36 a of the hub engaging portion 36 is passed through the third hole 43, the disc portion 35 b of the packing supporting portion 35 is inserted into the second hole 42, and the packing supporting portion is inserted into the first hole 41. The columnar portion 35a of 35 is provided so as to penetrate the columnar support portion 35 and engage with the packing support portion 35. In the state where the taper portion 40 of the packing 37 is naturally aligned and inserted into the taper portion 6 of the syringe body 2, as shown in FIG. 5, the packing 37 is engaged. A wall surface 23b in which a spherical surface 36c of the insertion portion 36b of the hub engaging portion 36 on the arrow A side of the packing support portion 35 faces the third taper hole 23 of the piston engaging hole 20.
The shape of the packing 37 is set so as to be in contact with the. The diameter of the cylindrical portion 39 of the packing 37 is
The inner pressing plate 33 has substantially the same diameter as that of the packing 3
On the outer peripheral side of the columnar portion 39 of No. 7, a ring-shaped fold 45 having a shape along the outer periphery of the columnar portion 39 is formed in a double manner along the directions of arrows A and B. Therefore, the columnar portion 39 and the folds 45 of the packing 37 are inserted into the main cylindrical portion 3 of the syringe body 2 so as to be contracted by elastic deformation in the direction toward the axis P1 (that is, the arrow D direction). There is. That is, the columnar portion 39 and the folds 45 of the packing 37 press the inner peripheral surface 3c of the main cylindrical portion 3 with the force in the direction away from the axial center (that is, the arrow C direction), and the packing 37 and the main cylindrical portion. Part 3
Between the and, it is sealed with a water seal (or air seal).
Further, the columnar portion 39 of the packing 37 exerts a force on the packing 37 on the side of the first hole 41 and the second hole 42 so as to reduce the diameters of the first hole 41 and the second hole 42. Therefore, the packing support portion 35 and the packing 37, which are inserted into the first hole 41 and the second hole 42, are in press contact with each other, and between the packing 37 and the packing support portion 35,
It is sealed in a water seal (or air seal). In addition, the inner peripheral surface 3c of the main cylindrical portion 3 of the syringe body 2 is formed smoothly, and therefore the piston 29 with the packing 37 inserted therein has arrows A, B in the internal space 2a of the main cylindrical portion 3.
It is slidable in any direction.
【００１６】注射器１は、以上のように構成されてお
り、該注射器１を組立る際には、以下の手順で行う。即
ち、注射器１の構成部品であるシリンジ１００、ハブ
９、注射針２６、ピストン２９、パッキン３７を準備し
て、まず初めに、シリンジ１００にハブ９を挿着する。
即ち、シリンジ本体２の開口端部３ａより、ハブ９を、
該シリンジ本体２の内部空間２ａに挿入する。挿入の
際、該ハブ９の小円柱部１１側がシリンジ本体２の小円
筒部７側（図の矢印Ａ側）に向く形で挿入する。続け
て、該ハブ９を、図６に示すように、更に図の矢印Ａ側
に挿入して、該ハブ９を、シリンジ本体２の小円筒部７
の内部即ち、ハブ挿着空間４ａに、該ハブ９の面取り部
１０ｃが、該ハブ９の主円柱部１０の外径Ｌ１’よりも
小さい内径を形成しているハブ止リブ７ｄに当接する位
置まで挿入する。なお、ハブ９の主円柱部１０の外径Ｌ
１’及び、小円柱部１１の外径（即ち、外径Ｌ１’より
も小さい外径）は、小円筒部７のうちハブ止リブ７ｄが
形成されていない部分の内径Ｌ１よりも小さいので、ハ
ブ９の面取り部１０ｃが、内径Ｌ１’よりも小さい内径
Ｌ３を形成しているハブ止リブ７ｄに当接する位置まで
は、該ハブ９は、小円筒部７のハブ挿着空間４ａにスム
−ズに挿入される。なお、ハブ９を、該ハブ９の面取り
部１０ｃがハブ止リブ７ｄに当接する位置まで挿入する
途中で、該ハブ９の小円柱部１１の矢印Ａ側の端面１１
ａがハブ挿着部４の端壁８の矢印Ｂ側の壁面８ｂの位置
に到達する。しかし、端壁８の孔８ａは、小円柱部１１
と矢印Ａ、Ｂ方向に対応した位置に存在し、かつその径
が小円柱部１１の径よりも大なる径に形成されているの
で、小円柱部１１の端面１１ａが端壁８の壁面８ｂに到
達する際には、該端面１１ａが孔８ａに整合する形で到
達する。つまり、ハブ９を、該ハブ９の面取り部１０ｃ
がハブ止リブ７ｄに当接する位置まで挿入することによ
り、小円柱部１１は、端壁８の孔８ａに円滑に挿入され
る。面取り部１０ｃがハブ止リブ７ｄに当接した後、図
６に示すように、ハブ９の矢印Ｂ側の端部１０ｂ側よ
り、該ハブ９に矢印Ａ方向の力を加える。ハブ９に矢印
Ａ方向の力を加えることによって、該ハブ９は、面取り
部１０ｃとハブ止リブ７ｄとの当接箇所においてハブ止
リブ７ｄに対して、面取り部１０ｃのテ−パ状の表面に
垂直な方向即ち、図の矢印Ｋ方向に作用力Ｍを与える。
作用力Ｍのうち、矢印Ａ方向の成分の分力は、剪断或い
は、曲げ応力としてハブ止リブ７ｄ内等で釣合い、作用
力Ｍのうち、矢印Ｃ方向の成分の分力は、ハブ止リブ７
ｄを介して小円筒部７を矢印Ｃ方向に押圧する。小円筒
部７は、構造上、矢印Ｃ方向の力に対して弾性変形しや
すく、従って、作用力Ｍのうち、矢印Ｃ方向の成分の分
力により、小円筒部７はハブ止リブ７ｄ及び、ハブ止リ
ブ７ｄ付近において、矢印Ｃ方向に膨張する。小円筒部
７のハブ止リブ７ｄ及び、ハブ止リブ７ｄ付近が矢印Ｃ
方向に膨張するので、小円筒部７のハブ止リブ７ｄにお
ける内径が広がり、内径の広がりに従って、矢印Ａ方向
に押される力を受けているハブ９は矢印Ａ方向に進む。
ハブ９が矢印Ａ方向に進んだ位置においても、ハブ９
は、続けて面取り部１０ｃにおいて、ハブ止リブ７ｄを
押圧し、ハブ止リブ７ｄを押圧する力の矢印Ｃ方向の成
分の分力によって、小円筒部７のハブ止リブ７ｄ及び、
ハブ止リブ７ｄ付近が矢印Ｃ方向に更に膨張する。よっ
て、小円筒部７のハブ止リブ７ｄにおける内径が更に広
がり、内径の広がりに従って、矢印Ａ方向に押される力
を受けているハブ９は、更に矢印Ａ方向に進む。なおも
続けて、ハブ９に矢印Ａ方向の力を加えて、ハブ止リブ
７ｄ及び、ハブ止リブ７ｄ付近を更に、矢印Ｃ方向に膨
張させながら、ハブ９を矢印Ａ方向に進める。そして、
ハブ止リブ７ｄが面取り部１０ｃの最も矢印Ｂ側即ち、
主円柱部１０の外周面１０ｉにおいて、ハブ９と当接す
る位置まで、ハブ９を進める。ハブ止リブ７ｄが、主円
柱部１０の外周面１０ｉに当接する位置までハブ９が進
むことにより、ハブ止リブ７ｄと外周面１０ｉとの当接
箇所では、図７に示すように、ハブ止リブ７ｄ及び、ハ
ブ止リブ７ｄ付近が、矢印Ｄ方向に復元しようとする復
元力がハブ止リブ７ｄを介して、主円柱部１０に、外周
面１０ｉにおいて加わる。よって、ハブ止リブ７ｄが、
主円柱部１０の外周面１０ｉに当接する位置において、
ハブ９に矢印Ａ方向の力を加えて、該ハブ９を更に矢印
Ａ方向に進めようとすると、この外周面１０ｉにおいて
該ハブ９に加わる矢印Ｄ方向の力によって、ハブ９に
は、矢印Ｂ方向に摩擦力が働く。つまり、ハブ９に、該
摩擦力に抵抗しえる矢印Ａ方向の力を加えつつ、該ハブ
９を更に矢印Ａ方向に進める。ハブ９を更に矢印Ａ方向
に進めて、ハブ９の主円柱部１０の端面１０ａを、端壁
８の矢印Ｂ側の壁面８ｂに密着させるまで、ハブ９を進
める。密着させるまでハブ９を進めた後、更に、ハブ９
を矢印Ａ方向に押圧する。押圧により、ハブ９は、該ハ
ブ９の矢印Ａ側に密着している端壁８に矢印Ａ方向の力
を与え、該力は端壁８と一体的に設けられている小円筒
部７の可伸長部７ｃ（及び、その他のシリンジ本体２の
各部分）に伝達されるので、従って、可伸長部７ｃは、
矢印Ａ、Ｂ方向に弾性変形により伸長する。更に押圧を
続けて可伸長部７ｃを伸長させて、端壁８の壁面８ｂと
ハブ止リブ７ｄとの間の矢印Ａ、Ｂ方向の距離が、距離
Ｌ２から距離Ｌ２’になるまで押圧する。また、可伸長
部７ｃの伸長に伴って、ハブ止リブ７ｄは、ハブ９の外
周面１０ｉに沿ってハブ９に対して相対的に矢印Ｂ側に
移動し、端壁８の壁面８ａからハブ止リブ７ｄまでの距
離が距離Ｌ２’になることによって、ハブ止リブ７ｄの
位置と、ハブ９のハブ止溝１０ｅの位置が互いに整合さ
れる。ハブ止リブ７ｄ及び、ハブ止リブ７ｄの付近に
は、矢印Ｄ方向の復元力が働いているので、ハブ止リブ
７ｄの位置とハブ止溝１０ｅの位置とが互いに整合され
ることにより、ハブ止リブ７ｄの先端７ｅ側が、ハブ止
溝１０ｅに矢印Ｄ方向に挿入する形で、ハブ止リブ７ｄ
及び、ハブ止リブ７ｄの付近は、矢印Ｄ方向にやや復元
する（但し、自然状態までは復元しない。）。また、ハ
ブ止リブ７ｄの先端７ｅ側が、ハブ止溝１０ｅに矢印Ｄ
方向に挿入することにより、ハブ止リブ７ｄは、ハブ止
溝１０ｅの矢印Ａ、Ｂ両側の開口端部１０ｈ、１０ｈに
当接する形で、ハブ９と係合する。なお、ハブ止リブ７
ｄのうち開口端部１０ｈ、１０ｈに当接した箇所は、上
述したように、前記シ−ル部７ｇ、７ｇになっている。
以上のように、シリンジ１００に対するハブ９の挿着を
終了する。なお、上述したように、ハブ９は、該ハブ９
と小円筒部７との間で、各力が互いに釣り合った形で、
小円筒部７に固定されている。また、シリンジ１００に
対するハブ９の挿着作業は、ハブ９を押圧して挿着すれ
ばよく、複雑な組立操作を伴わず容易である。The syringe 1 is constructed as described above, and when assembling the syringe 1, the procedure is as follows. That is, the syringe 100, the hub 9, the injection needle 26, the piston 29, and the packing 37, which are the components of the syringe 1, are prepared, and the hub 9 is first attached to the syringe 100.
That is, from the open end 3a of the syringe body 2, the hub 9 is
It is inserted into the internal space 2a of the syringe body 2. At the time of insertion, the hub 9 is inserted so that the small cylinder portion 11 side faces the small cylinder portion 7 side (arrow A side in the figure) of the syringe body 2. Then, as shown in FIG. 6, the hub 9 is further inserted into the arrow A side of the drawing to attach the hub 9 to the small cylindrical portion 7 of the syringe body 2.
Of the hub 9, where the chamfered portion 10c of the hub 9 contacts the hub stop rib 7d forming an inner diameter smaller than the outer diameter L1 'of the main columnar portion 10 of the hub 9. Insert up to. The outer diameter L of the main column 10 of the hub 9
1 ′ and the outer diameter of the small cylindrical portion 11 (that is, the outer diameter smaller than the outer diameter L1 ′) is smaller than the inner diameter L1 of the portion of the small cylindrical portion 7 where the hub stop rib 7d is not formed. Until the chamfered portion 10c of the hub 9 comes into contact with the hub stop rib 7d forming the inner diameter L3 smaller than the inner diameter L1 ', the hub 9 is smoothly inserted into the hub insertion space 4a of the small cylindrical portion 7. Inserted into the room. In addition, in the middle of inserting the hub 9 to the position where the chamfered portion 10c of the hub 9 contacts the hub stop rib 7d, the end surface 11 of the small column portion 11 of the hub 9 on the arrow A side is inserted.
a reaches the position of the wall surface 8b on the arrow B side of the end wall 8 of the hub insertion portion 4. However, the hole 8a of the end wall 8 is
And the diameter thereof is formed to be larger than the diameter of the small cylindrical portion 11, the end surface 11a of the small cylindrical portion 11 is the wall surface 8b of the end wall 8. When arriving at, the end surface 11a arrives in a form aligned with the hole 8a. That is, the hub 9 is replaced by the chamfered portion 10c of the hub 9.
The small cylindrical portion 11 is smoothly inserted into the hole 8a of the end wall 8 by inserting the small cylindrical portion 11 into the hole 8a. After the chamfered portion 10c comes into contact with the hub stop rib 7d, as shown in FIG. 6, a force in the arrow A direction is applied to the hub 9 from the end portion 10b side of the hub 9 on the arrow B side. By applying a force in the direction of arrow A to the hub 9, the hub 9 has a taper-shaped surface of the chamfered portion 10c with respect to the hub stop rib 7d at the contact portion between the chamfered portion 10c and the hub stop rib 7d. The acting force M is applied in the direction perpendicular to the direction, that is, in the direction of arrow K in the figure.
The component force of the component of the acting force M in the direction of the arrow A is balanced as shearing or bending stress in the hub stop rib 7d, and the component force of the component of the acting force M in the direction of arrow C is balanced. 7
The small cylindrical portion 7 is pressed in the direction of arrow C via d. Due to its structure, the small cylindrical portion 7 is easily elastically deformed with respect to the force in the arrow C direction. Therefore, due to the component force of the component of the acting force M in the arrow C direction, the small cylindrical portion 7 has a hub stop rib 7d and , Near the hub stop rib 7d, expands in the direction of arrow C. The hub stop rib 7d of the small cylindrical portion 7 and the vicinity of the hub stop rib 7d are indicated by an arrow C.
Since it expands in the direction, the inner diameter of the hub stop rib 7d of the small cylindrical portion 7 expands, and the hub 9 receiving the force pushed in the direction of arrow A advances in the direction of arrow A according to the expansion of the inner diameter.
Even when the hub 9 is advanced in the direction of arrow A, the hub 9
Continuously presses the hub stop rib 7d in the chamfered portion 10c, and the hub stop rib 7d of the small cylindrical portion 7 and the hub stop rib 7d of the small cylindrical portion 7 are pressed by the component force of the force of pressing the hub stop rib 7d.
The vicinity of the hub stop rib 7d further expands in the direction of arrow C. Therefore, the inner diameter of the hub stop rib 7d of the small cylindrical portion 7 further expands, and the hub 9 receiving the force pushed in the direction of arrow A further advances in the direction of arrow A as the inner diameter expands. Further, subsequently, a force in the direction of arrow A is applied to the hub 9, and the hub stop rib 7d and the vicinity of the hub stop rib 7d are further expanded in the direction of arrow C, and the hub 9 is advanced in the direction of arrow A. And
The hub stop rib 7d is closest to the arrow B of the chamfered portion 10c, that is,
On the outer peripheral surface 10i of the main cylindrical portion 10, the hub 9 is advanced to a position where it abuts on the hub 9. As the hub stop rib 7d advances to a position where the hub stop rib 7d contacts the outer peripheral surface 10i of the main cylindrical portion 10, the hub stop rib 7d and the outer peripheral surface 10i contact each other at the contact point as shown in FIG. A restoring force for restoring the rib 7d and the vicinity of the hub stop rib 7d in the direction of the arrow D is applied to the main cylindrical portion 10 on the outer peripheral surface 10i via the hub stop rib 7d. Therefore, the hub stop rib 7d
At the position where it abuts on the outer peripheral surface 10i of the main cylindrical portion 10,
When a force in the direction of arrow A is applied to the hub 9 to further advance the hub 9 in the direction of arrow A, the hub 9 is forced to move in the direction of arrow B by the force in the direction of arrow D applied to the hub 9 at the outer peripheral surface 10i. Friction force acts in the direction. That is, the hub 9 is further advanced in the arrow A direction while applying a force in the arrow A direction capable of resisting the frictional force to the hub 9. The hub 9 is further advanced in the direction of arrow A, and the hub 9 is advanced until the end surface 10a of the main cylindrical portion 10 of the hub 9 is brought into close contact with the wall surface 8b of the end wall 8 on the arrow B side. After advancing the hub 9 until it comes into close contact,
Is pressed in the direction of arrow A. When pressed, the hub 9 applies a force in the direction of arrow A to the end wall 8 that is in close contact with the hub 9 on the side of arrow A, and the force is applied to the small cylindrical portion 7 integrally provided with the end wall 8. Since it is transmitted to the extendable portion 7c (and other parts of the syringe body 2), the extendable portion 7c is
It extends in the directions of arrows A and B by elastic deformation. The pressing is further continued to extend the expandable portion 7c and the pressing is continued until the distance between the wall surface 8b of the end wall 8 and the hub stop rib 7d in the directions of arrows A and B becomes the distance L2 to the distance L2 '. Further, along with the extension of the extendable portion 7c, the hub stop rib 7d moves toward the arrow B side relative to the hub 9 along the outer peripheral surface 10i of the hub 9 and moves from the wall surface 8a of the end wall 8 to the hub. Since the distance to the stop rib 7d becomes the distance L2 ', the position of the hub stop rib 7d and the position of the hub stop groove 10e of the hub 9 are aligned with each other. Since the restoring force in the direction of arrow D acts on the hub stop rib 7d and the hub stop rib 7d, the position of the hub stop rib 7d and the position of the hub stop groove 10e are aligned with each other, so that the hub The tip 7e side of the stop rib 7d is inserted into the hub stop groove 10e in the direction of arrow D, so that the hub stop rib 7d
Also, the vicinity of the hub stop rib 7d is slightly restored in the direction of the arrow D (however, it is not restored to the natural state). Further, the end 7e side of the hub stop rib 7d is provided with an arrow D in the hub stop groove 10e.
By inserting the hub stop rib 7d in the direction, the hub stop rib 7d engages with the hub 9 so as to abut the open ends 10h and 10h on both sides of the arrows A and B of the hub stop groove 10e. The hub stop rib 7
As described above, the portions of d that are in contact with the open ends 10h and 10h are the seal portions 7g and 7g.
As described above, the insertion of the hub 9 into the syringe 100 is completed. In addition, as described above, the hub 9 is
Between the small cylindrical portion 7 and the
It is fixed to the small cylindrical portion 7. Further, the hub 9 can be inserted into the syringe 100 by pressing the hub 9 for insertion, which is easy without complicated assembly operation.
【００１７】次いで、ピストン２９にパッキン３７を挿
着する。まず、パッキン３７の可撓性を利用して、該パ
ッキン３７の第一孔４１を、該第一孔４１の径とパッキ
ン支持部３５の円板部３５ｂの径が等しくなる形に、手
等により広げる。次いで、ピストン２９のうちハブ係合
部３６側を、パッキン３７の第一孔４１側より矢印Ａ方
向に挿入する。更につづけて、ハブ係合部３６の挿入部
３６ｂがパッキン３７の第三孔４３を矢印Ａ方向に貫通
通過し、該挿入部３６ｂがパッキン３７のテ−パ部４０
の矢印Ａ側に突出する状態、従って、ハブ係合部３６の
円柱部３６ａが、第三孔４３に挿入され、パッキン支持
部３５の円柱部３５ａ及び、円板部３５ｂが、それぞれ
広げられた第一孔４１及び、第二孔４２に挿入される状
態まで、ピストン２９を挿入する。その後、第一孔４１
を広げていた手等を放して、パッキン３７を自然状態に
戻すことにより、パッキン３７の挿着を完了させる。次
いで、パッキン３７を挿着したピストン２９を、シリン
ジ本体２に挿入する。ピストン２９の挿入は、該ピスト
ン２９のパッキン３７が挿着されている側を、シリンジ
本体２の開口端部３ａ側からシリンジ本体２の内部空間
２ａに挿入する形で行われる。ところで、自然状態にお
けるパッキン３７の円柱部３９及び、ヒダ４５における
外径はシリンジ本体２の主円筒部３の内径よりも大きい
が、パッキン３７の可撓性を利用してパッキン３７の円
柱部３９及び、ヒダ４５の外径を縮小させることによっ
て、パッキン３７は、シリンジ本体２の内部空間２ａに
挿入され得る。つまり、パッキン３７のテ−パ部４０側
を開口端部３ａに整合した後、ピストン２９を矢印Ａ方
向に押圧することによって、パッキン３７は、シリンジ
本体２の内部空間２ａに整合した形即ち、パッキン３７
の円柱部３９及び、ヒダ４５の外径を縮小させる形でシ
リンジ本体２の内部空間２ａに挿入される。なお、内押
圧板３３の外径及び、ピストン本体３０の平板部３０ａ
の幅はシリンジ本体２の主円筒部３の内径に略等しい
（或いは、小さい）ので、内押圧板３３及び、ピストン
本体３０は、シリンジ本体２の内部空間２ａにスム−ズ
に挿入される。なお、ピストン２を矢印Ａ方向に挿入す
ることにより、パッキン３７及び、内押圧板３３は、主
円筒部３の係止リブ３ｂの位置を通過する。係止リブ３
ｂの位置を通過する際、パッキン３７は、ピストン２を
矢印Ａ方向に押圧する力に対する反力を係止リブ３ｂか
ら受けて、該反力により、更に円柱部３９及び、ヒダ４
５の外径を、シリンジ本体２の主円筒部３の係止リブ３
ｂでの内径と等しく縮小させる形で通過する。また、パ
ッキン３７に続いて内押圧板３３が係止リブ３ｂの位置
を通過する際、外径が係止リブ３ｂの内径よりも大きい
内押圧板３３の周囲側が、係止リブ３ｂに当接するが、
当接する際、ピストン２９を矢印Ａ方向に押圧する力
が、内押圧板３３を介し、内押圧板３３に当接した係止
リブ３ｂを介して、主円筒部３の係止リブ３ｂ付近を矢
印Ｃ方向に弾性膨張させる。従って、内押圧板３３が係
止リブ３ｂの位置を通過する際には、係止リブ３ｂにお
ける内径が広がる形で通過する。なお、通過の後、内押
圧板３３は、係止リブ３ｂから離れるので、主円筒部３
を矢印Ｃ方向に膨張させる力がなくなり、主円筒部３の
係止リブ３ｂ付近は矢印Ｄ方向に復元する。パッキン３
７及び、内押圧板３３が、主円筒部３の係止リブ３ｂの
位置を通過した後、更に、ピストン２９を矢印Ａ方向に
挿入させ、パッキン３７のテ−パ部４０が、シリンジ本
体２のテ−パ部６の内部に整合し挿入する位置までピス
トン２９を挿入させ、ピストン２９の挿入を終える。な
お、パッキン３７のテ−パ部４０が、シリンジ本体２の
テ−パ部６の内部に整合し挿入した状態では、上述した
ように、ピストン２９のハブ係合部３６の挿入部３６ｂ
は、該挿入部３６ｂの球面３６ｃ側が、前記ハブ９に設
けられたピストン係合孔２０の第三テ−パ孔２５に面し
た壁面２５ａに接する形で存在している。Next, the packing 37 is inserted into the piston 29. First, by using the flexibility of the packing 37, the first hole 41 of the packing 37 is formed into a shape such that the diameter of the first hole 41 and the diameter of the disk portion 35b of the packing support portion 35 are equal. To spread. Next, the hub engaging portion 36 side of the piston 29 is inserted in the direction of arrow A from the first hole 41 side of the packing 37. Further, the insertion portion 36b of the hub engaging portion 36 passes through the third hole 43 of the packing 37 in the direction of arrow A, and the insertion portion 36b passes through the taper portion 40 of the packing 37.
Of the hub engaging portion 36 is inserted into the third hole 43, and the column portion 35a of the packing support portion 35 and the disc portion 35b are expanded. The piston 29 is inserted until it is inserted into the first hole 41 and the second hole 42. After that, the first hole 41
The packing 37 is completely inserted by returning the packing 37 to the natural state by releasing the hand etc. Next, the piston 29 having the packing 37 inserted therein is inserted into the syringe body 2. The piston 29 is inserted by inserting the side of the piston 29, on which the packing 37 is inserted, into the internal space 2a of the syringe body 2 from the opening end 3a side of the syringe body 2. By the way, although the outer diameter of the cylindrical portion 39 of the packing 37 and the fold 45 in the natural state is larger than the inner diameter of the main cylindrical portion 3 of the syringe body 2, the flexibility of the packing 37 is utilized to make the cylindrical portion 39 of the packing 37. Also, the packing 37 can be inserted into the internal space 2 a of the syringe body 2 by reducing the outer diameter of the pleats 45. That is, after the taper 40 side of the packing 37 is aligned with the open end 3a, the packing 37 is aligned with the internal space 2a of the syringe body 2 by pressing the piston 29 in the direction of arrow A, that is, Packing 37
The cylindrical portion 39 and the pleats 45 are inserted into the internal space 2a of the syringe body 2 in a form of reducing the outer diameter thereof. The outer diameter of the inner pressing plate 33 and the flat plate portion 30a of the piston body 30.
The width of the inner pressure plate 33 and the piston body 30 are smoothly inserted into the inner space 2a of the syringe body 2 because the width thereof is substantially equal to (or smaller than) the inner diameter of the main cylindrical portion 3 of the syringe body 2. By inserting the piston 2 in the direction of arrow A, the packing 37 and the inner pressing plate 33 pass through the position of the locking rib 3b of the main cylindrical portion 3. Locking rib 3
When passing through the position b, the packing 37 receives a reaction force against the force pressing the piston 2 in the direction of the arrow A from the locking rib 3b, and the reaction force further causes the columnar portion 39 and the folds 4 to be formed.
The outer diameter of the locking rib 3 of the main cylindrical portion 3 of the syringe body 2
It passes in a form of contraction equal to the inner diameter at b. Further, when the inner pressing plate 33 passes through the position of the locking rib 3b following the packing 37, the peripheral side of the inner pressing plate 33 whose outer diameter is larger than the inner diameter of the locking rib 3b contacts the locking rib 3b. But,
At the time of contact, the force that presses the piston 29 in the direction of arrow A is applied to the vicinity of the locking rib 3b of the main cylindrical portion 3 via the inner pressing plate 33 and the locking rib 3b contacting the inner pressing plate 33. Elastically expand in the direction of arrow C. Therefore, when the inner pressing plate 33 passes the position of the locking rib 3b, the inner pressing plate 33 passes in a form in which the inner diameter of the locking rib 3b widens. After passing, the inner pressing plate 33 separates from the locking rib 3b, so that the main cylindrical portion 3
The force for inflating in the direction of arrow C disappears, and the vicinity of the locking rib 3b of the main cylindrical portion 3 is restored in the direction of arrow D. Packing 3
7 and the inner pressing plate 33 have passed the position of the locking rib 3b of the main cylindrical portion 3, and then the piston 29 is further inserted in the direction of arrow A, and the taper portion 40 of the packing 37 causes the syringe body 2 to move. The piston 29 is inserted to a position where the piston 29 is aligned and inserted into the taper portion 6 and the insertion of the piston 29 is completed. In the state in which the taper portion 40 of the packing 37 is aligned and inserted into the taper portion 6 of the syringe body 2, as described above, the insertion portion 36b of the hub engaging portion 36 of the piston 29 is used.
Exists such that the spherical surface 36c side of the insertion portion 36b is in contact with the wall surface 25a of the piston engaging hole 20 provided in the hub 9 that faces the third taper hole 25.
【００１８】次いで、ハブ９の針挿入孔１２に注射針２
６を挿入し接着する。つまり、注射針２６を、図２に示
すように、該注射針２６の後端２６ｂ側より、針挿入孔
１２に矢印Ｂ方向に挿入し、該後端２６ｂが、針挿入孔
１２の奥のハブ９による壁面１０ｆに当接するまで挿入
する。挿入の後、針挿入孔１２におけるハブ９と注射針
２６との間の隙間に接着剤２７を充填して、該接着剤２
７を固結させ、ハブ９に対する注射針２６の挿入接着が
完了する。なお、接着剤２７を針挿入孔１２に充填する
際、針挿入孔１２に設けられた、第一テ−パ孔１３、第
二テ−パ孔１６によって、接着剤２７が、針挿入孔１２
の奥側（即ち、矢印Ｂ側）まで、途中に隙間を極力形成
せず、流動し得るようになっている。また、注射針２６
の挿入接着完了をもって注射器１の組立てが完了する。
なお、注射器１の組立ては、上述のように、大部分の作
業（即ち、注射針２６の挿入固定の作業を除いてた全て
の作業）が、押圧することによって行われるため、注射
器１の組立ては、複雑な作業を伴わず容易である。Then, the injection needle 2 is inserted into the needle insertion hole 12 of the hub 9.
Insert 6 and glue. That is, as shown in FIG. 2, the injection needle 26 is inserted into the needle insertion hole 12 in the direction of arrow B from the rear end 26b side of the injection needle 26, and the rear end 26b is located at the back of the needle insertion hole 12. The hub 9 is inserted until it contacts the wall surface 10f. After the insertion, the gap between the hub 9 and the injection needle 26 in the needle insertion hole 12 is filled with the adhesive 27, and the adhesive 2
7 is solidified, and insertion and adhesion of the injection needle 26 to the hub 9 is completed. When the adhesive 27 is filled in the needle insertion hole 12, the adhesive 27 is fixed by the first taper hole 13 and the second taper hole 16 provided in the needle insertion hole 12.
Up to the inner side (that is, the arrow B side), the flow is possible without forming a gap in the middle as much as possible. In addition, the injection needle 26
The assembly of the syringe 1 is completed upon completion of insertion and bonding.
As described above, most of the work for assembling the syringe 1 (that is, all work except the work for inserting and fixing the injection needle 26) is performed by pressing, so that the syringe 1 is assembled. Is easy without complicated work.
【００１９】以上のように構成され組立てられた注射器
１を使用し、使用の後、廃棄するには、次のように行
う。まず、組立られた注射器１に液状の注射媒体４６を
充填する。注射媒体４６の充填は、注射器１のシリンジ
本体２の主円筒部３を一方の手で掴み支持し、注射器１
の注射針２６の先端２６ａを、図示しない薬ビンに入っ
ている注射媒体４６の中に進入させ、次いで、他方の手
で、ピストン２９の外押圧板３２を掴み、該ピストン２
９をシリンジ本体２に対して矢印Ｂ方向に引っ張ること
によって行われる。ところで、シリンジ本体２の内部空
間２ａのうち、パッキン３７或いは、ハブ係合部３６よ
りも矢印Ａ側に存在する空間即ち、媒体保持空間４７
は、注射針２６の媒体流通孔２６ｃ及び、ハブ９の流通
孔１９、ピストン係合孔２０を通して注射針２６の先端
２６ａ側の外部即ち、図示しない薬ビンの中と矢印Ａ、
Ｂ方向に連通している。また、ピストン２９をシリンジ
本体２に対して矢印Ｂ方向に引っ張ることによって媒体
保持空間４７は拡大し、従って、媒体保持空間４７の空
気（或いは、注射媒体４６）の圧力が低下しようとす
る。よって、媒体保持空間４７と注射針２６の先端２６
ａ側の外部即ち、図示しない薬ビンの中との間で差圧が
生じ、該薬ビンの中の注射媒体４６は、注射針２６の媒
体流通孔２６ｃ及び、ハブ９の流通孔１９、ピストン係
合孔２０を通して媒体保持空間４７に流入する。ピスト
ン２９をシリンジ本体２に対して更に矢印Ｂ方向に引っ
張り、媒体保持空間４７を更に拡大させて、該媒体保持
空間４７に所定量の注射媒体４６を流入させることによ
り、注射媒体４６の充填が終了する（なお、注射媒体４
６を所定量よりやや多目に充填した後、注射器１を、注
射針２６側を上に向ける形で支持し、ピストン２９をシ
リンジ本体２に対して矢印Ａ方向に押して、媒体保持空
間４７中の空気或いは、余分な注射媒体４６等を、注射
針２６等を介して外部に排出させてもよい。）。The syringe 1 constructed and assembled as described above is used, and after use, it is discarded as follows. First, the assembled syringe 1 is filled with a liquid injection medium 46. The injection medium 46 is filled by holding the main cylindrical portion 3 of the syringe body 2 of the syringe 1 with one hand and supporting it.
The tip 26a of the injection needle 26 of No. 2 is inserted into the injection medium 46 contained in a medicine bottle (not shown), and then the outer pressing plate 32 of the piston 29 is grasped by the other hand, and the piston 2
This is performed by pulling 9 in the direction of arrow B with respect to the syringe body 2. By the way, in the internal space 2a of the syringe body 2, a space existing on the arrow A side of the packing 37 or the hub engaging portion 36, that is, a medium holding space 47.
Through the medium flow hole 26c of the injection needle 26, the flow hole 19 of the hub 9, and the piston engagement hole 20 to the outside of the tip 26a side of the injection needle 26, that is, in the medicine bottle (not shown) and the arrow A,
It communicates in the B direction. Further, the medium holding space 47 is expanded by pulling the piston 29 in the direction of the arrow B with respect to the syringe body 2, so that the pressure of the air (or the injection medium 46) in the medium holding space 47 tends to decrease. Therefore, the medium holding space 47 and the tip 26 of the injection needle 26
A differential pressure is generated between the outside on the a side, that is, the inside of the drug bottle (not shown), and the injection medium 46 in the drug bottle has a medium flow hole 26c of the injection needle 26, a flow hole 19 of the hub 9, and a piston. It flows into the medium holding space 47 through the engagement hole 20. The piston 29 is further pulled in the direction of the arrow B with respect to the syringe body 2, the medium holding space 47 is further expanded, and a predetermined amount of the injection medium 46 is caused to flow into the medium holding space 47, whereby the injection medium 46 is filled. Completed (Injection medium 4
After filling 6 a little more than a predetermined amount, the syringe 1 is supported with the injection needle 26 side facing upward, and the piston 29 is pushed in the direction of arrow A with respect to the syringe body 2 in the medium holding space 47. The air or excess injection medium 46 or the like may be discharged to the outside via the injection needle 26 or the like. ).
【００２０】なお、注射媒体４６の充填の際、媒体保持
空間４７と該媒体保持空間４７の外部との間では、差圧
が生じており、従って、媒体保持空間４７と該媒体保持
空間４７の外部とを隔てているハブ９には、図４の二点
鎖線に示すように、矢印Ｂ方向の差圧力Ｎａが作用す
る。しかし、予想される最大の差圧力Ｎａに対しても、
矢印Ａ側及び、矢印Ｂ側の各シ−ル部７ｇと各開口端部
１０ｈの間で作用している、図４中二点鎖線で示すシ−
ル圧Ｆｄ及び、シ−ル圧Ｆｅが共に０或いはマイナスに
ならず、矢印Ａ側及び、矢印Ｂ側の各シ−ル部７ｇと各
開口端部１０ｈの間のシ−ルが外れない形で所定の前記
復元力Ｆｂｃが設定されている。よって、媒体保持空間
４７の中の注射媒体４６が、ハブ挿着部４のハブ挿着空
間４ａに流入し、該ハブ挿着空間４ａからハブ９と小円
筒部７との間の隙間空間４９に流入するが、ハブ止リブ
７ｄの矢印矢印Ｂ側のシ−ル部７ｇとハブ９の矢印矢印
Ｂ側の開口端部１０ｈとの間はシ−ルされているので、
注射媒体４６は、矢印Ｂ側の該シ−ル部７ｇと該開口端
部１０ｈとの間を通って、ハブ止リブ７ｄの矢印Ａ側等
に漏洩することはない。また、矢印Ｂ側の該シ−ル部７
ｇと該開口端部１０ｈとの間の１ヶ所だけでなく、矢印
Ａ側の該シ−ル部７ｇと該開口端部１０ｈとの間及び、
端壁８とハブ９の端面１０ａとの間もシ−ルされている
ことによって、注射媒体４６の漏洩に対する安全性は極
力高められている。また、ハブ止リブ７ｄとハブ９間
は、シ−ル部７ｇ、７ｇ、開口端部１０ｈ、１０ｈとの
点接触によるシ−ルであることから、シ−ル圧がシ−ル
部位に均等に作用し、信頼性が高い。When the injection medium 46 is filled, a pressure difference is generated between the medium holding space 47 and the outside of the medium holding space 47, and therefore, the medium holding space 47 and the medium holding space 47. As shown by the chain double-dashed line in FIG. 4, a differential pressure Na in the direction of arrow B acts on the hub 9 which is separated from the outside. However, even for the maximum expected differential pressure Na,
A seal shown by a chain double-dashed line in FIG. 4, which acts between the seal portions 7g on the arrow A side and the arrow B side and the open end portions 10h.
Both the seal pressure Fd and the seal pressure Fe do not become 0 or minus, and the seal between the seal portions 7g on the arrow A side and the arrow B side and the open end portions 10h does not come off. The predetermined restoring force Fbc is set at. Therefore, the injection medium 46 in the medium holding space 47 flows into the hub insertion space 4a of the hub insertion portion 4, and the gap space 49 between the hub 9 and the small cylindrical portion 7 is formed from the hub insertion space 4a. However, since there is a seal between the seal portion 7g of the hub stop rib 7d on the arrow B side and the opening end 10h of the hub 9 on the arrow B side, there is a seal.
The injection medium 46 does not leak to the arrow A side of the hub stop rib 7d, passing between the seal portion 7g on the arrow B side and the open end portion 10h. Also, the seal portion 7 on the arrow B side
not only at one location between g and the opening end 10h, but also between the seal portion 7g on the arrow A side and the opening end 10h, and
The sealing between the end wall 8 and the end surface 10a of the hub 9 also maximizes the safety against leakage of the injection medium 46. Further, between the hub stop rib 7d and the hub 9, since the seal is made by point contact with the seal portions 7g, 7g and the open end portions 10h, 10h, the seal pressure is evenly applied to the seal portion. It works and is highly reliable.
【００２１】一方、パッキン３７においては、上述した
ように、パッキン３７の円柱部３９及び、ヒダ４５が、
矢印Ｄ方向に弾性変形による縮小をする形で、シリンジ
本体２の主円筒部３に挿入されている。つまり、パッキ
ン３７の円柱部３９及び、ヒダ４５は、矢印Ｃ方向の力
で主円筒部３の内周面３ｃを押圧しており、パッキン３
７と主円筒部３との間は、水封（或いは、気封）にシ−
ルされている。つまり、媒体保持空間４７の注射媒体４
６は、パッキン３７と主円筒部３との間を通って、パッ
キン３７の矢印Ｂ側の内部空間２ａ等に漏洩することは
ない。また、パッキン３７の円柱部３９及び、ヒダ４５
が、矢印Ｄ方向に弾性変形による縮小をしているので、
該パッキン３７の第一孔４２、第二孔４３に挿入してい
るピストン２９のパッキン支持部３５は、該パッキン３
７によって矢印Ｄ方向に押圧される。つまり、パッキン
３７とパッキン支持部３５との間は、互いに密着しシ−
ルされている。従って、媒体保持空間４７の注射媒体４
６は、パッキン３７の第三孔４３までは流入し得るが、
更に第二孔４２及び、第一孔４１をパッキン３７とパッ
キン支持部３５との間を通って通過して、パッキン３７
の矢印Ｂ側の内部空間２ａ等に漏洩することはない。On the other hand, in the packing 37, as described above, the columnar portion 39 of the packing 37 and the fold 45 are
It is inserted in the main cylindrical portion 3 of the syringe body 2 in a form of being contracted by elastic deformation in the direction of arrow D. That is, the columnar portion 39 and the folds 45 of the packing 37 press the inner peripheral surface 3c of the main cylindrical portion 3 with the force in the arrow C direction, and the packing 3
7 and the main cylindrical portion 3 are sealed with water (or air).
Has been That is, the injection medium 4 in the medium holding space 47
6 does not leak to the internal space 2a on the arrow B side of the packing 37, etc., passing through between the packing 37 and the main cylindrical portion 3. In addition, the column portion 39 of the packing 37 and the fold 45
However, since it is contracted by elastic deformation in the direction of arrow D,
The packing support portion 35 of the piston 29 inserted into the first hole 42 and the second hole 43 of the packing 37 is the packing 3
It is pressed in the direction of arrow D by 7. That is, the packing 37 and the packing support portion 35 are in close contact with each other and the seal
Has been Therefore, the injection medium 4 in the medium holding space 47
6 can flow into the third hole 43 of the packing 37,
Furthermore, the second hole 42 and the first hole 41 are passed through between the packing 37 and the packing support portion 35 to pass through the packing 37.
There is no leakage into the internal space 2a or the like on the arrow B side.
【００２２】注射媒体４６の充填の後、注射器１の主円
筒部３を一方の手で掴みながら、該注射器１の注射針２
６を、患者の注射部位に突き刺す。After filling the injection medium 46, while holding the main cylindrical portion 3 of the syringe 1 with one hand, the injection needle 2 of the syringe 1 is held.
6 is pierced at the injection site of the patient.
【００２３】次いで、注射器１のシリンジ本体２の主円
筒部３を一方の手の指と指で挾むと共に、挾んでいる指
と指で、注射器支持部５を、該注射器支持部５の矢印Ａ
側の板面より矢印Ｂ方向に支持固定する。そして、主円
筒部３を挾んだ指の手と同じ手の他の指（親指）で、ピ
ストン２９の外押圧板３２を矢印Ａ方向に押し、ピスト
ン２９をシリンジ本体２に対して矢印Ａ方向に駆動させ
る。ピストン２９の駆動により、媒体保持空間４７は容
積が縮小するので、媒体保持空間４７中の注射媒体４６
は加圧される。加圧により、媒体保持空間４７と、注射
針２６の先端２６ａ側の外部即ち、患者の体内との間に
は圧力差が生じるので、媒体保持空間４７の注射媒体４
６は、ハブ９のピストン係合孔２０及び、流通孔１９及
び、注射針２６の媒体流通孔２６ｃを介して患者の注射
部位における体内に流入する。Next, the main cylindrical portion 3 of the syringe body 2 of the syringe 1 is sandwiched between the fingers of one hand, and the syringe support 5 is moved between the fingers of the sandwiched fingers. A
It is supported and fixed in the direction of arrow B from the side plate surface. Then, the outer pressing plate 32 of the piston 29 is pushed in the direction of arrow A by the other finger (thumb) of the same hand as the one holding the main cylindrical portion 3 to push the piston 29 to the syringe body 2 with the arrow A. Drive in the direction. Since the volume of the medium holding space 47 is reduced by driving the piston 29, the injection medium 46 in the medium holding space 47 is reduced.
Is pressurized. Due to the pressurization, a pressure difference is generated between the medium holding space 47 and the outside of the tip 26a of the injection needle 26, that is, the inside of the patient's body.
6 flows into the body at the injection site of the patient via the piston engagement hole 20 of the hub 9, the flow hole 19 and the medium flow hole 26c of the injection needle 26.
【００２４】なお、上述のように、媒体保持空間４７中
の注射媒体４６が加圧され、注射媒体４６に隣接してい
るハブ９の端面１０ｂ側より、該ハブ９には、注射媒体
４６の圧力による作用力Ｓａが、図８に示すように、矢
印Ａ方向に加わる。しかし、予想される最大の作用力Ｓ
ａに対しても、矢印Ａ側及び、矢印Ｂ側の各シ−ル部７
ｇと各開口端部１０ｈの間で作用しているシ−ル圧Ｆｄ
及び、シ−ル圧Ｆｅが共に０或いはマイナスにならず、
矢印Ａ側及び、矢印Ｂ側の各シ−ル部７ｇと各開口端部
１０ｈの間のシ−ルが外れない形で所定の前記復元力Ｆ
ｂｃが設定されている。よって、端壁８とハブ９の端面
１０ａとの間及び、ハブ止リブ７ｄの矢印Ａ側、矢印Ｂ
側の各シ−ル部７ｇ、７ｇとハブ９の矢印Ａ側、矢印Ｂ
側の各開口端部１０ｈ、１０ｈとの間は引き続きシ−ル
されており、水密状態（或いは、気密状態）に維持され
ている。As described above, the injection medium 46 in the medium holding space 47 is pressurized, and the injection medium 46 is attached to the hub 9 from the end surface 10b side of the hub 9 adjacent to the injection medium 46. The acting force Sa due to pressure is applied in the direction of arrow A, as shown in FIG. However, the maximum expected force S
Also for a, each seal portion 7 on the arrow A side and the arrow B side
g and the seal pressure Fd acting between each opening end 10h
Also, the seal pressure Fe does not become 0 or negative,
The predetermined restoring force F in a form in which the seal between the seal portions 7g on the arrow A side and the arrow B side and the open end portions 10h does not come off.
bc is set. Therefore, between the end wall 8 and the end surface 10a of the hub 9, and between the hub stop rib 7d on the arrow A side and the arrow B side.
Side seal portions 7g, 7g and the arrow A side of the hub 9, arrow B
The space between the open end portions 10h and 10h on the side is continuously sealed, and the watertight state (or the airtight state) is maintained.
【００２５】注射媒体４６を所定の量まで患者の注射部
位における体内に流入させた後、従って、パッキン３７
のテ−パ部４０が、シリンジ本体２のテ−パ部６の内部
に整合して挿入し、ピストン２９のハブ係合部３６の挿
入部３６ｂが、図５に示すように、ハブ９のピストン係
合孔２０の第三テ−パ孔２５に当接するまでピストン２
９を駆動させた後、注射器１を支持している手或いは、
指を介して、該注射器１全体を患者に対して矢印Ｂ方向
に引っ張り、注射針２６を患者の注射部位から引き抜
く。注射針２６を引き抜いた後、ピストン２９とハブ９
とを互いに係合させる。即ち、ピストン２９の外押圧板
３２を指で、更に矢印Ａ方向に押圧する。なお、注射媒
体４６を体内に流入させる作業が完了した直後には、パ
ッキン３７のテ−パ部４０が、シリンジ本体２のテ−パ
部６の内部に整合して挿入しており、挿入部３６ｂは第
三テ−パ孔２５の内部に整合して挿入していた。よっ
て、ピストン２９を駆動させて挿入部３６ｂを第三テ−
パ孔２５を矢印Ａ方向に進入させるに従って、パッキン
３７にも矢印Ａ方向の力が作用する。パッキン３７は、
テ−パ部６によって、矢印Ｂ方向に支持されているの
で、矢印Ａ方向には移動できない。しかし、パッキン３
７は可撓性を有しており、パッキン３７自体が弾性変形
により矢印Ａ、Ｂ方向に縮小する形で留まり、挿入部３
６ｂのみが矢印Ａ方向に移動する。また、押圧によって
ピストン２９には、矢印Ａ方向の力が加えられるので、
ハブ係合部３６の挿入部３６ｂには、図５に示すよう
に、矢印Ａ方向の押圧力Ｔが加えられる。押圧力Ｔは、
挿入部３６ｂと、第三テ−パ孔２５に面したハブ９によ
る壁面２５ａとの当接の方向即ち、壁面２５ａに垂直な
方向である図の矢印Ｗ方向（即ち、軸心Ｐ１から遠ざか
る方向で、かつ矢印Ａ方向寄りの方向）の分力Ｔａとし
て、挿入部３６ｂと壁面２５ａとの当接箇所において、
挿入部３６ｂからハブ９に作用する。また、挿入部３６
ｂと壁面２５ａとの当接箇所においては、分力Ｔａの反
力Ｔａ’が、矢印Ｗ方向と逆方向の矢印Ｗ’方向に、ハ
ブ９から挿入部３６ｂに作用する。この分力Ｔａによ
り、挿入部３６ｂが壁面２５ａにおいて当接しているハ
ブ９の突出部２５ｂは、突出部２５ｂの頂点における径
即ち、境界部２３ａにおける径を拡大する形で矢印Ｗ方
向に弾性変形する。また、反力Ｔａ’により、挿入部３
６ｂは、軸心Ｐ１に垂直な断面の径を縮小させる形で弾
性変形する。更に、ピストン２９を矢印Ａ方に押圧し、
該挿入部３６ｂを第三テ−パ孔２５において矢印Ａ方向
に更に進入させる。即ち、挿入部３６ｂが、該挿入部３
６ｂの径を縮小させると共に境界部２３ａの径を拡大さ
せる形で、該挿入部３６ｂの径と該境界部２３ａの径の
大きさを一致させながら、境界部２３ａを矢印Ａ方向に
通過するようにさせる。そして、挿入部３６ｂ全体が該
境界部２３ａを完全に通過した後、ピストン２９の押圧
を終了する。なお、挿入部３６ｂ全体が該境界部２３ａ
を完全に通過することにより、挿入部３６ｂは、図５の
二点鎖線で示すように、第一テ−パ孔２１、円柱孔２
２、第二テ−パ孔２３によって形成される空間に整合す
る形で挿入する。また、挿入部３６ｂの矢印Ｂ側に伸延
している円柱部３６ａは、境界部２３ａを矢印Ａ、Ｂ方
向に貫通する形で存在している。つまり、ピストン２９
とハブ９は互いに係合された。なお、挿入部３６ｂに矢
印Ａ方向の押圧力Ｔが作用することによって、ハブ９に
も矢印Ａ方向の押圧力Ｔが作用する（なぜなら、押圧力
Ｔの分力Ｔａの合力が押圧力Ｔであるから。）。しか
し、ハブ９は、ハブ挿着部４のハブ止リブ７ｄ或いは、
端壁８の軸心Ｐ１に対して直角に形成された壁面８ｂを
介して、シリンジ本体２を支持する手により矢印Ｂ方向
に支持されており、従って、押圧力Ｔに対する矢印Ｂ方
向の反力をハブ止リブ７ｄ或いは、端壁８より受ける。
つまり、ハブ９は、押圧力Ｔを受けても矢印Ａ方向等に
殆ど移動せず、よって、ハブ９が端壁８の孔８ａから矢
印Ａ方向に抜け出ることはない。After injecting the injection medium 46 up to a predetermined amount into the body of the patient at the injection site, the packing 37
The taper portion 40 of the piston 29 is aligned and inserted into the taper portion 6 of the syringe body 2, and the insertion portion 36b of the hub engaging portion 36 of the piston 29 is inserted into the hub 9 as shown in FIG. Until the piston 2 is in contact with the third taper hole 25 of the piston engagement hole 20
After driving 9, the hand holding the syringe 1 or
Through the finger, the entire syringe 1 is pulled in the direction of arrow B with respect to the patient, and the injection needle 26 is pulled out from the injection site of the patient. After withdrawing the injection needle 26, the piston 29 and the hub 9
And engage each other. That is, the outer pressing plate 32 of the piston 29 is further pressed with a finger in the direction of arrow A. Immediately after the work of injecting the injection medium 46 into the body is completed, the taper portion 40 of the packing 37 is aligned with the taper portion 6 of the syringe body 2 and is inserted. 36b was inserted in alignment with the inside of the third taper hole 25. Therefore, the piston 29 is driven to move the insertion portion 36b to the third tape.
The force in the direction of the arrow A also acts on the packing 37 as the packing hole 25 enters in the direction of the arrow A. The packing 37 is
Since it is supported in the arrow B direction by the taper portion 6, it cannot move in the arrow A direction. However, packing 3
7 has flexibility, and the packing 37 itself remains elastically deformed so as to shrink in the directions of arrows A and B, and the insertion portion 3
Only 6b moves in the direction of arrow A. Further, since the force in the direction of arrow A is applied to the piston 29 by the pressing,
As shown in FIG. 5, a pressing force T in the direction of arrow A is applied to the insertion portion 36b of the hub engagement portion 36. The pressing force T is
The direction of contact between the insertion portion 36b and the wall surface 25a by the hub 9 facing the third taper hole 25, that is, the direction perpendicular to the wall surface 25a, that is, the arrow W direction in the figure (that is, the direction away from the axis P1). And a component force Ta in the direction closer to the arrow A direction) at the contact portion between the insertion portion 36b and the wall surface 25a,
It acts on the hub 9 from the insertion portion 36b. In addition, the insertion portion 36
At the contact point between b and the wall surface 25a, the reaction force Ta 'of the component force Ta acts on the insertion portion 36b from the hub 9 in the arrow W'direction opposite to the arrow W direction. Due to this component force Ta, the protruding portion 25b of the hub 9 with which the insertion portion 36b is in contact with the wall surface 25a is elastically deformed in the arrow W direction so as to expand the diameter at the apex of the protruding portion 25b, that is, the diameter at the boundary portion 23a. To do. Further, the reaction force Ta ′ causes the insertion portion 3
6b is elastically deformed by reducing the diameter of the cross section perpendicular to the axis P1. Furthermore, press the piston 29 in the direction of arrow A,
The insertion portion 36b is further advanced in the third taper hole 25 in the direction of arrow A. That is, the insertion portion 36b is replaced by the insertion portion 3
In order to reduce the diameter of 6b and increase the diameter of the boundary portion 23a, the diameter of the insertion portion 36b and the diameter of the boundary portion 23a are made to coincide with each other so that the boundary portion 23a is passed in the direction of arrow A. Let Then, after the entire insertion portion 36b has completely passed through the boundary portion 23a, the pressing of the piston 29 is terminated. Note that the entire insertion portion 36b is the boundary portion 23a.
When the insertion portion 36b completely passes through the first taper hole 21 and the cylindrical hole 2 as shown by the chain double-dashed line in FIG.
2. Insert in a form matching the space formed by the second taper hole 23. Further, the columnar portion 36a extending to the arrow B side of the insertion portion 36b exists in a form penetrating the boundary portion 23a in the arrow A and B directions. That is, the piston 29
And the hub 9 are engaged with each other. Note that the pressing force T in the direction of arrow A acts on the insertion portion 36b, so that the pressing force T in the direction of arrow A also acts on the hub 9 (because the resultant force of the component force Ta of the pressing force T is the pressing force T). because there is.). However, the hub 9 has the hub stopper rib 7d of the hub insertion portion 4 or
The syringe body 2 is supported in the arrow B direction by a hand supporting the syringe body 2 via a wall surface 8b formed at a right angle to the axis P1 of the end wall 8, and therefore, the reaction force in the arrow B direction with respect to the pressing force T. Is received from the hub stop rib 7d or the end wall 8.
That is, the hub 9 hardly moves in the arrow A direction or the like even when receiving the pressing force T, and therefore the hub 9 does not slip out of the hole 8 a of the end wall 8 in the arrow A direction.
【００２６】ピストン２９とハブ９とを互いに係合させ
た後、シリンジ本体２の主円筒部３を一方の手で支持
し、他方の手で、外押圧板３２をシリンジ本体２に対し
て矢印Ｂ方向に引く。外押圧板３２を引くことによっ
て、ピストン２９及び、ハブ係合部３６の挿入部３６ｂ
には、図５の二点鎖線に示すように、、矢印Ｂ方向の作
用力Ｚが作用する。ところで、作用力Ｚは、挿入部３６
ｂと、第二テ−パ孔２３に面したハブ９による壁面２３
ｂとの当接の方向即ち、壁面２３ｂに垂直な方向である
図５の矢印Ｖ方向（即ち、軸心Ｐ１から遠ざかる方向
で、かつ矢印Ｂ方向寄りの方向）の分力Ｚａとして、挿
入部３６ｂと壁面２３ｂとの当接箇所において、挿入部
３６ｂからハブ９に作用する。また、挿入部３６ｂと壁
面２３ｂとの当接箇所においては、分力Ｚａの反力Ｚ
ａ’が、矢印Ｖ方向と逆方向の矢印Ｖ’方向に、ハブ９
から挿入部３６ｂに作用する。なお、上述したように、
反力Ｚａ’は、挿入部３６ｂを矢印Ｖ’方向に縮小させ
る力となるが、反力Ｚａ’は、挿入部３６ｂを、境界部
２３ａの径を通過できるまで相対的に縮小させる力より
も小さい。また、挿入部３６ｂに矢印Ｂ方向の作用力Ｚ
が作用することによって、ハブ９にも矢印Ｂ方向の作用
力Ｚが作用する（なぜなら、作用力Ｚの分力Ｚａの合力
が作用力Ｚであるから。）。なお、ピストン２９とハブ
９を係合させる際に、ハブ９がシリンジ本体２に対して
矢印Ａ方向に移動して、ハブ９とハブ止リブ７ｄとの係
合が外れてた場合も、作用力Ｚにより、ハブ９がシリン
ジ本体２に対して矢印Ｂ方向に移動するので、ハブ９と
ハブ止リブ７ｄとは、再び、両者が係合した状態と同様
の位置に一旦戻る。また、作用力Ｚが働く際の、ハブ挿
着部４とハブ９との間の力学的関係は図示しないが、作
用力Ｚは差圧力Ｎａと同じ方向に働く。また作用力Ｚ
は、注射媒体４６の充填の際に生じる差圧力Ｎａと同じ
方向に働くが、作用力Ｚの大きさは、予想される最大の
差圧力Ｎａよりも大きい。ところで、所定の前記復元力
Ｆｂｃは、予想される最大の差圧力Ｎａに対しては十分
対抗し得る大きさで設定されているが、予想される最大
の差圧力Ｎａよりも大きい作用力Ｚに対しては対抗し得
ない大きさに設定されている。即ち、作用力Ｚにより、
ハブ９が矢印Ａ側の開口端部１０ｈにおいて、ハブ止リ
ブ７ｄを矢印Ｃ方向に押圧移動させる。つまり、小円筒
部７のハブ止リブ７ｄ及び、ハブ止リブ７ｄ付近は、更
に矢印Ｃ方向に膨張変形する。また、ハブ止リブ７ｄが
矢印Ｃ方向に移動するのであるから、ハブ止リブ７ｄと
ハブ９との間のシ−ル（特に矢印Ｂ側において）は勿論
外れている。こうして、更に、作用力Ｚを加えつづけ、
小円筒部７のハブ止リブ７ｄ及び、ハブ止リブ７ｄ付近
を矢印Ｃ方向に更に膨張させる。一方、膨張により小円
筒部７のハブ止リブ７ｄにおける内径が広がり、該内径
の広がりに従って、矢印Ｂ方向に引かれる力を受けてい
るハブ９は、矢印Ｂ方向に進む。更に、作用力Ｚを加え
つづけ、ハブ９を、ハブ止リブ７ｄの先端７ｅが矢印Ａ
側の開口端部１０ｈ即ち、主円柱部１０の外周面１０ｉ
において、ハブ９と当接する位置まで進める。ハブ止リ
ブ７ｄが、主円柱部１０の外周面１０ｉに当接する位置
までハブ９が進んだ後、ハブ止リブ７ｄと外周面１０ｉ
との当接箇所において発生する矢印Ａ方向の摩擦力に対
抗し得る力でピストン２９を引っ張り、該ハブ９を更に
矢印Ｂ方向に進めて、ハブ９が完全に小円筒部７から矢
印Ｂ方向に抜け出るまで引っ張る。この際、ハブ９の主
円柱部１０の外径Ｌ１’は、ハブ挿着孔４ｂの内径Ｌ１
よりも小なる径に形成されているので、ハブ９と小円筒
部７の接触はハブ止リブ７ｄ部分を介してのみ行われる
こととなり、その引き抜き動作はハブ止リブ７ｄとハブ
止溝１０ｅとの係合が外れた以降は、小さな力で容易に
行うことができる。更にピストン２９を引っ張り、ハブ
９の矢印Ａ側に固定挿入された注射針２６が端壁８の孔
８ａよりハブ挿着空間４ａに矢印Ｂ方向に挿入し、更に
矢印Ｂ方向に主円筒部３の内部空間２ａに挿入して、注
射針２６の先端２６ａが完全に内部空間２ａ内に挿入す
る形で、ピストン２９を矢印Ｂ方向に引っ張る。ピスト
ン２９を更に引っ張り、図１０に示すように、内押圧板
３３が、シリンジ本体２の主円筒部３の係止リブ３ｂに
当接する位置まで引っ張ってピストン２９を停止させ
る。なお、ピストン２９の内押圧板３３が係止リブ３ｂ
によって係止されることにより、誤ってピストン２９を
引きすぎ、ピストン２９に係合されたハブ９に挿着され
た注射針２６がシリンジ本体２外部に飛び出すことが防
止されており、注射針２６で手等を傷つけ起こす二次感
染等の事故が防止されている。また、ピストン２９の内
押圧板３３が係止リブ３ｂによって係止された状態で
は、ピストン２９のピストン本体３０に形成された切欠
き３１の位置が、図１０に示すように、矢印ＡＢ方向に
おいて、シリンジ本体２の開口端部３ａの位置に整合し
た状態になっている。次いで、シリンジ本体２を一方の
手で固定したまま、他方の手で、ピストン２９を掴み、
図１０に示すように、該ピストン２９に矢印Ｃ方向の力
を与える。シリンジ本体２に対して、ピストン２９に矢
印Ｃ方向の力が加えられることにより、ピストン本体３
０には、前記係止リブ３ｂとシリンジ本体２の開口端部
３ａとを支点とする形で曲げ応力が加わり、ピストン本
体３０において比較的曲げ応力に対して構造上弱く形成
されている切欠き３１においてピストン本体３０は折
れ、ピストン本体３０は、切欠き３１を境に矢印Ａ側の
部分と矢印Ｂ側の部分とに分離される。なお、係止リブ
３ｂとシリンジ本体２の開口端部３ａとを支点とするこ
とによって、テコの原理によりピストン本体３０に曲げ
応力を効果的に加えることができる。また、切欠き３１
の位置が開口端部３ａの位置即ち、支点の位置に存在す
ることより、ピストン本体３０に加わる曲げ応力は、切
欠き３１の部分に効果的に加えられる。従って、ピスト
ン本体３０の折り曲げ分離即ち、折取りが容易に行われ
る。次いで、これらの折取りされたシリンジ本体２側の
部分とピストン２９の外押圧板３２の部分とを廃棄処分
する。なお、注射針２６は、完全にシリンジ本体２の内
部空間２ａに残留したピストン２９先端部に保持された
状態で挿入格納されているため、該注射針２６によっ
て、手等を傷つけ、その傷口より二次感染する恐れはな
く、従って、廃棄処分が安全に行われる。また、ピスト
ン２９が折り取りされることによって、折り取り後の注
射器１はかさばらず、よって、廃棄処分がスム−ズに行
える。以上のように、注射器１の使用及び、使用後の廃
棄処分を全て終了する。After the piston 29 and the hub 9 are engaged with each other, the main cylindrical portion 3 of the syringe body 2 is supported by one hand, and the outer pressing plate 32 is indicated by the arrow on the syringe body 2 with the other hand. Pull in the B direction. By pulling the outer pressing plate 32, the piston 29 and the insertion portion 36b of the hub engagement portion 36 are pulled.
As shown by the chain double-dashed line in FIG. By the way, the acting force Z is
b and the wall surface 23 formed by the hub 9 facing the second taper hole 23
As the component force Za in the direction of contact with b, that is, in the direction perpendicular to the wall surface 23b, that is, in the direction of arrow V in FIG. At the contact point between 36b and the wall surface 23b, the insertion portion 36b acts on the hub 9. In addition, at the contact portion between the insertion portion 36b and the wall surface 23b, the reaction force Z of the component force Za.
a ′ is in the direction of arrow V ′ opposite to the direction of arrow V, and the hub 9
Acts on the insertion portion 36b. As mentioned above,
The reaction force Za ′ is a force that reduces the insertion portion 36b in the direction of the arrow V ′, but the reaction force Za ′ is smaller than the force that relatively reduces the insertion portion 36b until it can pass the diameter of the boundary portion 23a. small. Further, the acting force Z in the direction of arrow B is applied to the insertion portion 36b.
The action force Z in the direction of the arrow B also acts on the hub 9 due to the action (because the resultant force of the component force Za of the action force Z is the action force Z). When the piston 29 and the hub 9 are engaged with each other, the hub 9 moves in the direction of the arrow A with respect to the syringe body 2 and the engagement between the hub 9 and the hub stop rib 7d is disengaged. The force Z causes the hub 9 to move in the direction of the arrow B with respect to the syringe body 2, so that the hub 9 and the hub stop rib 7d once again return to the same position as when they were engaged with each other. Further, although the mechanical relationship between the hub insertion portion 4 and the hub 9 when the acting force Z acts is not shown, the acting force Z acts in the same direction as the differential pressure Na. Also acting force Z
Acts in the same direction as the differential pressure Na generated when the injection medium 46 is filled, but the magnitude of the acting force Z is larger than the maximum expected differential pressure Na. By the way, the predetermined restoring force Fbc is set to a magnitude that can sufficiently oppose the expected maximum pressure difference Na, but the acting force Z is larger than the expected maximum pressure difference Na. It is set to a size that cannot be opposed. That is, due to the acting force Z,
The hub 9 pushes and moves the hub stop rib 7d in the arrow C direction at the opening end 10h on the arrow A side. That is, the hub stop rib 7d of the small cylindrical portion 7 and the vicinity of the hub stop rib 7d are further expanded and deformed in the arrow C direction. Also, since the hub stop rib 7d moves in the direction of arrow C, the seal between the hub stop rib 7d and the hub 9 (particularly on the arrow B side) is of course disengaged. In this way, the action force Z is further added,
The hub stop rib 7d of the small cylindrical portion 7 and the vicinity of the hub stop rib 7d are further expanded in the arrow C direction. On the other hand, the inner diameter of the hub stop rib 7d of the small cylindrical portion 7 expands due to the expansion, and the hub 9 that receives a force pulled in the direction of arrow B moves in the direction of arrow B as the inner diameter expands. Further, by continuously applying the acting force Z, the hub 9 is moved so that the tip 7e of the hub stop rib 7d is indicated by the arrow A.
Side opening end portion 10h, that is, the outer peripheral surface 10i of the main columnar portion 10
In, proceed to a position where it abuts on the hub 9. After the hub 9 is advanced to the position where the hub stop rib 7d contacts the outer peripheral surface 10i of the main columnar portion 10, the hub stop rib 7d and the outer peripheral surface 10i are connected.
The piston 29 is pulled by a force capable of counteracting the frictional force in the direction of arrow A generated at the contact point with the hub 9, and the hub 9 is further advanced in the direction of arrow B so that the hub 9 is completely moved from the small cylindrical portion 7 in the direction of arrow B. Pull until you get out. At this time, the outer diameter L1 ′ of the main cylindrical portion 10 of the hub 9 is equal to the inner diameter L1 of the hub insertion hole 4b.
Since the hub 9 and the small cylindrical portion 7 come into contact with each other only through the hub stopper rib 7d, the pulling-out operation is performed between the hub stopper rib 7d and the hub stopper groove 10e. After the engagement is disengaged, it can be easily performed with a small force. Further, the piston 29 is pulled, the injection needle 26 fixedly inserted on the arrow A side of the hub 9 is inserted into the hub insertion space 4a through the hole 8a of the end wall 8 in the arrow B direction, and further in the arrow B direction. The piston 29 is pulled in the direction of arrow B so that the tip 26a of the injection needle 26 is completely inserted into the internal space 2a. The piston 29 is further pulled, and as shown in FIG. 10, the inner pressing plate 33 is pulled to a position where it abuts on the locking rib 3b of the main cylindrical portion 3 of the syringe main body 2 to stop the piston 29. In addition, the inner pressing plate 33 of the piston 29 has the locking rib 3b.
The piston 29 is prevented from being accidentally pulled too much, and the injection needle 26 inserted into the hub 9 engaged with the piston 29 is prevented from jumping out of the syringe body 2 by being locked by the injection needle 26. Accidents such as secondary infections that could hurt your hands are prevented. Further, when the inner pressing plate 33 of the piston 29 is locked by the locking rib 3b, the position of the notch 31 formed in the piston body 30 of the piston 29 is in the arrow AB direction as shown in FIG. The position is aligned with the position of the open end 3a of the syringe body 2. Next, while holding the syringe body 2 with one hand, grasp the piston 29 with the other hand,
As shown in FIG. 10, a force in the direction of arrow C is applied to the piston 29. By applying a force in the direction of arrow C to the piston 29 with respect to the syringe body 2, the piston body 3
A bending stress is applied to 0 by using the locking rib 3b and the opening end portion 3a of the syringe body 2 as a fulcrum, and the notch formed in the piston body 30 is structurally weaker than the bending stress. At 31, the piston body 30 is broken, and the piston body 30 is separated at the notch 31 into a portion on the arrow A side and a portion on the arrow B side. By using the locking rib 3b and the opening end 3a of the syringe body 2 as a fulcrum, bending stress can be effectively applied to the piston body 30 by the principle of leverage. Also, the notch 31
Since the position of is present at the position of the opening end portion 3a, that is, the position of the fulcrum, the bending stress applied to the piston body 30 is effectively applied to the notch 31. Therefore, the piston body 30 can be easily separated by bending, that is, broken. Next, the broken part of the syringe body 2 side and the part of the outer pressing plate 32 of the piston 29 are discarded. Since the injection needle 26 is inserted and stored in a state in which it is completely retained in the inner space 2a of the syringe body 2 while being retained by the tip of the piston 29, the injection needle 26 injures a hand or the like, and There is no risk of secondary infections and therefore safe disposal. Further, since the piston 29 is broken off, the syringe 1 after breaking off is not bulky, and therefore, the disposal can be done smoothly. As described above, the use of the syringe 1 and the disposal after use are all completed.
【００２７】以上のように、注射器１のハブ９は、ハブ
挿着孔４ｂに挿入され、また該ハブ挿着孔４ｂからシリ
ンジ本体２の内部空間２ａに引き抜き得る筒状のハブ本
体９０を有しており、該ハブ本体９０の外周部には、ハ
ブ止溝１０ｅが、前記ハブ挿着孔４ｂの内面と係合し得
るように、環状に形成されている。ハブ本体９０のハブ
止溝１０ｅ以外の部分の外径Ｌ１’は、前記ハブ挿着孔
４ｂの対応する部分の内径Ｌ１よりも小なる形に形成さ
れており、ハブ本体９０の端部１１ａには、注射針２６
を挿入し得る針挿入孔１２が、該ハブ本体９０の軸心Ｐ
１の方向に設けられている。また、ハブ本体９０には、
流通孔１９が、針挿入孔１２と前記シリンジ本体２の内
部空間２ａとを軸心Ｐ１の方向に連通し得る形で設けら
れており、ハブ本体９０の端部には、ピストン係合孔２
０が、ピストン２９と係合自在に設けられている。ま
た、ハブ９とシリンジ本体２との接続構造は、ハブ挿着
孔４ｂに前記ハブ９のハブ本体９０が、ハブ挿着孔４ｂ
に挿入され、また該ハブ挿着孔４ｂから前記シリンジ本
体２の内部空間２ａに引き抜き得るように着脱自在に挿
入装着されており、ハブ挿着孔４ｂの内周面７ａにハブ
止リブ７ｄが環状に設けられていると共に、前記ハブ本
体９０のハブ止溝１０ｅが該ハブ止リブ７ｄに対して所
定の復元力Ｆｂｃで接触係合された形で設けられてい
る。また、ハブ止リブ７ｄ以外のハブ挿着孔４ｂの内周
面７ａと、ハブ本体９０の外周面１０ｉとの間に、間隙
空間４９が設けられている。なお、この間隙により、ハ
ブ９の内部空間２ａへの引き抜きが極めて容易となる。
また、ハブ９とシリンジ本体２との接続構造は、ハブ止
溝１０ｅの幅Ｌ４’とハブ止リブ７ｄの幅Ｌ４が相違す
るよう構成されている。また、注射器１は、前記接続構
造をなすシリンジ本体２及びハブ９を有しており、シリ
ンジ本体２の主円筒部３に、該主円筒部３の内部空間２
ａを軸心Ｐ１の方向に閉塞する形のピストン２９が、該
主円筒部３に対して軸心Ｐ１の方向に移動自在に設けら
れており。ピストン２９には、前記ハブ９のピストン係
合孔２０と係合し得るハブ係合部３６が、ピストン係合
孔２０に対向する形で設けられており、ハブ９の針挿入
孔１２には、注射針２６が設けられている。また、注射
器１のピストン２９は、ピストン本体３０が外押圧板３
２と内押圧板３３の間で折取り自在に構成されている。
また、注射器１の主円筒部３には、係合リブ３ｂが、前
記ピストン２９の内押圧板３３が主円筒部３から抜け出
さないように形成されている。また、注射器１のピスト
ン２９のピストン本体３０には、切欠き３１が形成され
ている。また、前記切欠き３１は、ピストン２９が係止
リブ３ｂに当接した際に、前記主円筒部３の開口端部３
ａに位置し得るように形成されている。更に、注射器１
を組立る際には、ハブ９を、該ハブ９のハブ止溝１０ｅ
と前記ハブ挿着部４のハブ止リブ７ｄとを互いに弾性的
に係合させる形で設置し、前記シリンジ本体２に、ピス
トン２９を挿入し、ハブ９の針挿入孔１２に、注射針２
６を挿入接続する。なお、予めハブ９に注射針２６を装
着した状態で、ハブ９及び注射針２６を一体的にハブ挿
着部４に挿入装着することも当然可能である。As described above, the hub 9 of the syringe 1 has the cylindrical hub body 90 which is inserted into the hub insertion hole 4b and can be pulled out from the hub insertion hole 4b into the internal space 2a of the syringe body 2. A hub stop groove 10e is formed in an annular shape on the outer peripheral portion of the hub body 90 so as to engage with the inner surface of the hub insertion hole 4b. The outer diameter L1 ′ of the portion of the hub body 90 other than the hub stop groove 10e is formed to be smaller than the inner diameter L1 of the corresponding portion of the hub insertion hole 4b, and at the end portion 11a of the hub body 90. Is the needle 26
The needle insertion hole 12 into which the
It is provided in the direction of 1. In addition, the hub body 90,
A flow hole 19 is provided in such a manner that the needle insertion hole 12 and the internal space 2a of the syringe body 2 can communicate with each other in the direction of the axis P1, and the piston engagement hole 2 is provided at the end of the hub body 90.
0 is provided so as to be engageable with the piston 29. Further, in the connection structure between the hub 9 and the syringe body 2, the hub body 90 of the hub 9 is inserted into the hub insertion hole 4b, and the hub insertion hole 4b is formed.
The hub stopper rib 7d is attached to the inner peripheral surface 7a of the hub insertion hole 4b so that it can be pulled out from the hub insertion hole 4b into the internal space 2a of the syringe body 2. The hub stop groove 10e of the hub body 90 is provided in an annular shape and is in contact with the hub stop rib 7d with a predetermined restoring force Fbc. A gap space 49 is provided between the inner peripheral surface 7a of the hub insertion hole 4b other than the hub stop rib 7d and the outer peripheral surface 10i of the hub body 90. The gap makes it extremely easy to pull out the hub 9 into the internal space 2a.
Further, the connection structure between the hub 9 and the syringe body 2 is configured such that the width L4 ′ of the hub stop groove 10e and the width L4 of the hub stop rib 7d are different. Further, the syringe 1 has the syringe body 2 and the hub 9 having the above-mentioned connection structure, and is provided in the main cylindrical portion 3 of the syringe body 2 in the internal space 2 of the main cylindrical portion 3.
A piston 29 that closes a in the direction of the axis P1 is provided so as to be movable in the direction of the axis P1 with respect to the main cylindrical portion 3. The piston 29 is provided with a hub engaging portion 36 capable of engaging with the piston engaging hole 20 of the hub 9 so as to face the piston engaging hole 20. An injection needle 26 is provided. Further, the piston 29 of the syringe 1 has the piston body 30 with the outer pressing plate 3.
2 and the inner pressing plate 33 are configured to be freely breakable.
An engagement rib 3b is formed on the main cylindrical portion 3 of the syringe 1 so that the inner pressing plate 33 of the piston 29 does not come out of the main cylindrical portion 3. A notch 31 is formed in the piston body 30 of the piston 29 of the syringe 1. Further, the notch 31 is provided with the opening end portion 3 of the main cylindrical portion 3 when the piston 29 comes into contact with the locking rib 3b.
It is formed so that it can be located at a. Furthermore, syringe 1
When assembling the hub 9, the hub 9 is attached to the hub stop groove 10e of the hub 9.
And the hub stop rib 7d of the hub insertion portion 4 are elastically engaged with each other, the piston 29 is inserted into the syringe body 2, and the injection needle 2 is inserted into the needle insertion hole 12 of the hub 9.
Insert and connect 6. It is also possible to insert the hub 9 and the injection needle 26 integrally into the hub insertion portion 4 and insert the hub 9 and the injection needle 26 integrally in a state where the injection needle 26 is attached to the hub 9 in advance.
【００２８】また、注射器１を使用する際には、幅の違
うハブ止溝１０ｅとハブ止リブ７ｄとが、互いに接する
箇所を２ヵ所において形成する。また、注射器１を使用
した後には、ピストン２９の軸心Ｐ１の方向の操作によ
って、ハブ９とピストン２９が、ピストン係合孔２０と
ハブ係合部３６とにおいて係合され、更に、ピストン２
９の軸心Ｐ１方向の操作によって、ハブ９及び、ハブ９
に装着された注射針２６が、シリンジ本体２の内部空間
２ａに挿入される。 また、ハブ９及び、ハブ９に装
着された注射針２６が、シリンジ本体２の内部空間２ａ
に挿入された後、ピストン２９の折取りを行う際、ピス
トン２９が係止リブ３ｂと開口端部３ａとにおいてシリ
ンジ本体２に支持されるので、テコの原理を働かせ得る
ように作用する。更に、注射器１を組立る際には、注射
器１のハブ９は、軸心Ｐ１方向に押圧して挿入する形で
ハブ挿着孔４ｂに装着される。Further, when the syringe 1 is used, the hub stop groove 10e and the hub stop rib 7d having different widths are formed at two places where they are in contact with each other. After using the syringe 1, the hub 9 and the piston 29 are engaged with each other in the piston engagement hole 20 and the hub engagement portion 36 by operating the piston 29 in the direction of the axis P1 of the piston 29.
The hub 9 and the hub 9 are operated by operating the shaft 9 in the direction of the axis P1.
The injection needle 26 attached to is inserted into the internal space 2a of the syringe body 2. In addition, the hub 9 and the injection needle 26 attached to the hub 9 are attached to the inner space 2 a of the syringe body 2.
When the piston 29 is broken off after being inserted into the syringe body 2, the piston 29 is supported by the syringe body 2 at the locking rib 3b and the opening end portion 3a, so that the lever principle can be exerted. Furthermore, when assembling the syringe 1, the hub 9 of the syringe 1 is mounted in the hub insertion hole 4b in a form of being pressed and inserted in the direction of the axis P1.
【００２９】よって、ハブ９及び、該ハブ９の接続構造
及び、該ハブ９を用いた注射器１では、所定の復元力Ｆ
ｂｃを所望の大きさに設定することにより、注射器１を
使用している間は、ハブ挿着孔４ｂに対するハブ９の挿
着状態が維持されるようになっており、該挿着状態は、
ハブ止溝１０ｅとハブ止リブ７ｄとが、２ヵ所において
接する形の２ヵ所のシ−ルになっている。つまり、注射
器１を使用している間は、ハブ９とシリンジ本体２との
間における水密性或いは、気密性が極力高められてい
る。Therefore, in the hub 9, the connecting structure of the hub 9 and the syringe 1 using the hub 9, a predetermined restoring force F is obtained.
By setting bc to a desired size, the insertion state of the hub 9 with respect to the hub insertion hole 4b is maintained while the syringe 1 is in use.
The hub stop groove 10e and the hub stop rib 7d form two seals that are in contact with each other at two places. That is, while the syringe 1 is in use, the watertightness or airtightness between the hub 9 and the syringe body 2 is enhanced as much as possible.
【００３０】なお、注射器１は、該注射器１のハブ挿入
部４に複数のスリット５０を設けた形で構成されてもよ
い。即ち、スリット５０を設けて構成した注射器１は、
図１１に示すように、上述した第一番目の実施例におけ
るスリット５０がない注射器１と同様に、シリンジ本体
２と注射器支持部５からなるシリンジ１００を有してお
り、シリンジ本体２には、内周面３ｃ側に係止リブ３ｂ
が設けられた主円筒部３及び、テ−パ部６及び、ハブ挿
入部４が互いに一体的に設けられている。ところで、ス
リット５０を設けて構成した注射器１では、ハブ挿入部
４は次のように構成されている。即ち、ハブ挿入部４
は、図１３及び、図１６に示すように、テ−パ部６に一
体的に設けられた小円筒部７と、該小円筒部７の端部７
ｂ側において該小円筒部７と一体的に設けられた端壁８
を有しており、小円筒部７の内側はハブ挿入孔４ｂとな
っている。小円筒部７の内周面７ａ側即ち、ハブ挿入孔
４ｂの内周面７ａ側には、ハブ止リブ７ｄが、円環状に
設けられており、ハブ止リブ７ｄの断面は円弧状に形成
されている。なお、小円筒部７の外周面７ｈ側には、補
強用リブ５１が、小円筒部７を挾んでハブ止リブ７ｄと
対応した位置に、円環状に設けられている。端壁８に
は、矢印Ａ、Ｂ方向に該端壁８を貫通した孔８ａが設け
られているが、孔８ａは、矢印Ａ方向に内径が拡大する
テ−パ状に形成されている。端壁８には、軸心Ｐ１に対
して放射方向即ち、図の矢印Ｃ、Ｄ方向に伸延した３本
の第一スリット５０ａが形成されており、これら３本の
第一スリット５０ａは、互いに軸心Ｐ１を中心として１
２０゜の等ピッチ間隔で形成されている。また、３本の
第一スリット５０ａは、端壁８に設けられた孔８ａに収
束する形で、それぞれ該孔８ａに連絡されている。一
方、小円筒部７には、矢印Ａ、Ｂ方向に平行な３本の第
二スリット５０ｂが形成されており、第二スリット５０
ｂは、前記ハブ止リブ７ｄ及び、前記補強用リブ５１よ
りも矢印Ａ側の位置で、前記ハブ止リブ７ｄ及び、前記
補強用リブ５１に到達しない形で形成されている。ま
た、３本の第二スリット５０ｂは、３本の第一スリット
５０ａと対応した形で形成されており、３本の第二スリ
ット５０ｂと３本の第一スリット５０ａとは、小円筒部
７と端壁８との境界部において、それぞれ対応したもの
どうしが連絡接続されて一体化している。また、互いに
連絡接続された第一スリット５０ａと第二スリット５０
ｂとはスリット５０となっており、３本のスリット５０
が形成されたハブ挿入部４は、端壁８及び、小円筒部７
の矢印Ａ側が３つのハブ挿入部片５２に分割されてい
る。The syringe 1 may be constructed by providing the hub insertion portion 4 of the syringe 1 with a plurality of slits 50. That is, the syringe 1 provided with the slit 50 is
As shown in FIG. 11, similarly to the syringe 1 without the slit 50 in the above-described first embodiment, it has a syringe 100 composed of a syringe body 2 and a syringe support portion 5, and the syringe body 2 has: Locking rib 3b on the inner peripheral surface 3c side
The main cylindrical portion 3 provided with the taper portion 6, the taper portion 6, and the hub insertion portion 4 are integrally provided with each other. By the way, in the syringe 1 configured by providing the slit 50, the hub insertion portion 4 is configured as follows. That is, the hub insertion portion 4
As shown in FIG. 13 and FIG. 16, is a small cylindrical portion 7 provided integrally with the taper portion 6 and an end portion 7 of the small cylindrical portion 7.
End wall 8 provided integrally with the small cylindrical portion 7 on the b side
The inside of the small cylindrical portion 7 is a hub insertion hole 4b. On the inner peripheral surface 7a side of the small cylindrical portion 7, that is, on the inner peripheral surface 7a side of the hub insertion hole 4b, a hub stop rib 7d is provided in an annular shape, and the hub stop rib 7d has an arc-shaped cross section. Has been done. On the outer peripheral surface 7h side of the small cylindrical portion 7, a reinforcing rib 51 is provided in an annular shape at a position corresponding to the hub stop rib 7d across the small cylindrical portion 7. The end wall 8 is provided with a hole 8a penetrating the end wall 8 in the directions of arrows A and B, and the hole 8a is formed in a taper shape whose inner diameter increases in the direction of arrow A. The end wall 8 is formed with three first slits 50a extending in the radial direction with respect to the axis P1, that is, in the directions of arrows C and D in the drawing, and these three first slits 50a are mutually formed. 1 around the axis P1
They are formed at equal pitch intervals of 20 °. Further, the three first slits 50a are connected to the holes 8a provided in the end wall 8 so as to converge to the holes 8a. On the other hand, the small cylindrical portion 7 is formed with three second slits 50b parallel to the directions of arrows A and B.
b is formed at a position on the arrow A side of the hub stop rib 7d and the reinforcing rib 51 so as not to reach the hub stop rib 7d and the reinforcing rib 51. Further, the three second slits 50b are formed in a shape corresponding to the three first slits 50a, and the three second slits 50b and the three first slits 50a are the small cylindrical portion 7 At the boundary between the end wall 8 and the end wall 8, corresponding ones are connected and integrated with each other. Further, the first slit 50a and the second slit 50 which are connected to each other are connected.
b is the slit 50, and the three slits 50
The hub insertion portion 4 formed with the end wall 8 and the small cylindrical portion 7 is
The arrow A side of is divided into three hub insertion pieces 52.
【００３１】スリット５０を設けて構成した注射器１の
ハブ９は、図１２に示すように、ハブ本体９０を有して
おり、ハブ本体９０には、前記小円筒部７の内径よりも
小さな外径をもつ主円柱部１０が設けられている。主柱
筒部１０の外周面１０ｉ側には、ハブ止溝１０ｅが円環
状に設けられている。なお、ハブ止溝１０ｅの矢印Ａ、
Ｂ方向の幅は、ハブ止リブ７ｄの矢印Ａ、Ｂ方向の幅よ
りも狭くなっている。主円柱部１０の矢印Ａ側には、小
円柱部１１が設けられており、ハブ９には、該小円柱部
１１の矢印Ａ側の端面１１ａから矢印Ｂ方向に、第一テ
−パ孔１３、第一円柱孔１５、第二テ−パ孔１６、第二
円柱孔１７からなる針挿入孔１２が設けられている。ま
た、ハブ９には、針挿入孔１２の矢印Ｂ側に、該針挿入
孔１２と矢印Ａ、Ｂ方向に連通した流通孔１９が設けら
れており、流通孔１９の矢印Ｂ側に、該流通孔１９と矢
印Ａ、Ｂ方向に連通したピストン係合孔２０が設けられ
ている。ピストン係合孔２０は、第一テ−パ孔２１、円
柱孔２２、第二テ−パ孔２３からなっており、ピストン
係合孔２０は、流通孔１９とハブ挿着孔４ｂの内部即
ち、ハブ挿着空間４ａとを矢印Ａ、Ｂ方向に連通してい
る。As shown in FIG. 12, the hub 9 of the syringe 1 having the slit 50 has a hub body 90, and the hub body 90 has an outer diameter smaller than the inner diameter of the small cylindrical portion 7. A main cylindrical portion 10 having a diameter is provided. A hub stop groove 10e is provided in an annular shape on the outer peripheral surface 10i side of the main pillar cylinder portion 10. In addition, the arrow A of the hub stop groove 10e,
The width in the B direction is smaller than the width of the hub stop rib 7d in the arrows A and B directions. A small column portion 11 is provided on the arrow A side of the main column portion 10, and the hub 9 has a first taper hole from the end surface 11a on the arrow A side of the small column portion 11 in the arrow B direction. A needle insertion hole 12 composed of 13, a first cylindrical hole 15, a second taper hole 16 and a second cylindrical hole 17 is provided. Further, the hub 9 is provided with a circulation hole 19 which communicates with the needle insertion hole 12 in the directions of arrows A and B on the arrow B side of the needle insertion hole 12, and on the arrow B side of the circulation hole 19, A piston engagement hole 20 that communicates with the flow hole 19 in the directions of arrows A and B is provided. The piston engagement hole 20 is composed of a first taper hole 21, a cylindrical hole 22, and a second taper hole 23. The piston engagement hole 20 is located inside the flow hole 19 and the hub insertion hole 4b. , The hub insertion space 4a communicates with the directions of arrows A and B.
【００３２】スリット５０を設けて構成した注射器１の
ハブ挿着部４は、図１４に示すように、ハブ挿着部４の
小円筒部７がハブ止リブ７ｄ及び、ハブ止リブ７ｄ付近
において矢印Ｃ方向に弾性膨張した形になっており、弾
性膨張したハブ挿着部４のハブ挿着孔４ｂに前記ハブ９
が挿着されている。ハブ９は、主円柱部１０をハブ挿着
孔４ｂに挿入すると共に、小円柱部１１を端壁８の孔８
ａに挿入する形で挿着されており、主円柱部１０の矢印
Ａ側の端面１０ａと、端壁８の矢印Ｂ側の壁面８ｂと
は、互いに密接している。また、小円筒部７のハブ止リ
ブ７ｄと主円柱部１０のハブ止溝１０ｅとは、互いに整
合対応した位置に存在しており、従って、ハブ止リブ７
ｄの先端７ｅがハブ止溝１０ｅに矢印Ｄ方向に挿入し、
ハブ止リブ７ｄの先端７ｅの両側のシ−ル部７ｇ、７ｇ
と、ハブ止溝１０ｅの両側の開口端部１０ｈ、１０ｈと
が互いにハブ９の外周に沿って線状に当接する形で、ハ
ブ止リブ７ｄとハブ９とが係合している。なお、ハブ挿
着孔４ｂに挿着されたハブ９の矢印Ｂ側の端面１０ｂの
位置は、図１１に示すように、矢印Ａ、Ｂ方向における
小円筒部７の中間付近に存在している。As shown in FIG. 14, in the hub insertion portion 4 of the syringe 1 having the slit 50, the small cylindrical portion 7 of the hub insertion portion 4 is located near the hub stop rib 7d and the hub stop rib 7d. The hub 9 is elastically expanded in the direction of arrow C, and the hub 9 is inserted into the hub insertion hole 4b of the elastically expanded hub insertion portion 4.
Has been inserted. The hub 9 inserts the main cylindrical portion 10 into the hub insertion hole 4b, and the small cylindrical portion 11 into the hole 8 of the end wall 8.
The end surface 10a of the main cylindrical portion 10 on the arrow A side and the wall surface 8b of the end wall 8 on the arrow B side are in close contact with each other. Further, the hub stop rib 7d of the small cylindrical portion 7 and the hub stop groove 10e of the main cylindrical portion 10 are present at positions corresponding to each other, and therefore, the hub stop rib 7 is provided.
Insert the tip 7e of d into the hub stop groove 10e in the direction of arrow D,
Seal portions 7g, 7g on both sides of the tip 7e of the hub stop rib 7d
And the open ends 10h and 10h on both sides of the hub stop groove 10e are in linear contact with each other along the outer circumference of the hub 9, and the hub stop rib 7d and the hub 9 are engaged with each other. The position of the end surface 10b on the arrow B side of the hub 9 inserted into the hub insertion hole 4b is near the middle of the small cylindrical portion 7 in the directions of arrows A and B, as shown in FIG. .
【００３３】ところで、ハブ止リブ７ｄ及び、ハブ止リ
ブ７ｄ付近は、矢印Ｃ方向に弾性変形により膨張してい
るので、ハブ止リブ７ｄには、図１５に示すように、矢
印Ｄ方向の所定の復元力Ｆｃが加えられている（なお、
小円筒部７は、矢印Ａ、Ｂ方向には変形していないの
で、端壁８とハブ９との間或いは、ハブ止リブ７ｄとハ
ブ９との間では、第一番目の実施例で説明した復元力Ｆ
ａ、Ｆｂ等の復元力が作用していない。）。つまり、復
元力Ｆｃによって、ハブ９とハブ止リブ７ｄとの矢印Ａ
側及び、矢印Ｂ側の当接箇所（即ち、矢印Ａ側及び、矢
印Ｂ側における各開口端部１０ｈと各シ−ル部７ｄ）で
は、互いにシ−ル圧Ｆｄ、Ｆｄ及び、シ−ル圧Ｆｅ、Ｆ
ｅを加え合う形で、従って、該当接箇所がシ−ルされる
形で釣り合っている。よって、ハブ止リブ７ｄの矢印Ａ
側、矢印Ｂ側の各シ−ル部７ｇ、７ｇとハブ９の矢印Ａ
側、矢印Ｂ側の各開口端部１０ｈ、１０ｈとの間は、図
１５の断面において点接触する形でシ−ルされており、
図４と同様に高度の水密状態（或いは、気密状態）にな
っている。なお、復元力Ｆｃは、ハブ挿入部４の材質或
いは、小円筒部７の肉厚或いは、ハブ止リブ７ｄとハブ
止溝１０ｅとの位置等によって、予め所望の大きさに設
定できる。なお、小円筒部７を挾んでハブ止リブ７ｄと
対応した位置に設けられている補強用リブ５１により、
小円筒部７においては、ハブ止リブ７ｄ及び、ハブ止リ
ブ７ｄ付近の剛性が高められており、所定の復元力Ｆｃ
が効率よく得られるようになっている。By the way, since the hub stop rib 7d and the vicinity of the hub stop rib 7d are expanded by elastic deformation in the arrow C direction, the hub stop rib 7d has a predetermined direction in the arrow D direction as shown in FIG. The restoring force Fc of
Since the small cylindrical portion 7 is not deformed in the directions of the arrows A and B, it will be described in the first embodiment between the end wall 8 and the hub 9 or between the hub stop rib 7d and the hub 9. Restoration force F
The restoring force of a, Fb, etc. is not acting. ). That is, by the restoring force Fc, the arrow A between the hub 9 and the hub stop rib 7d
Side and the contact points on the arrow B side (that is, on the arrow A side and the open end portions 10h and the seal portions 7d on the arrow B side), the seal pressures Fd, Fd, and the seal are mutually applied. Pressure Fe, F
e is added to each other, and therefore, the contact points are balanced in a sealed manner. Therefore, the arrow A on the hub stop rib 7d
Side, arrow B of each seal portion 7g, 7g on the side of arrow B and hub 9
Side, and between the open end portions 10h and 10h on the arrow B side are sealed in a point contact manner in the cross section of FIG.
Similar to FIG. 4, it is in a highly watertight state (or airtight state). The restoring force Fc can be set to a desired magnitude in advance depending on the material of the hub insertion portion 4, the wall thickness of the small cylindrical portion 7, the positions of the hub stop rib 7d and the hub stop groove 10e, and the like. In addition, by the reinforcing ribs 51 provided at positions corresponding to the hub stop ribs 7d by sandwiching the small cylindrical portion 7,
In the small cylindrical portion 7, the rigidity of the hub stop rib 7d and the vicinity of the hub stop rib 7d are increased, and a predetermined restoring force Fc is obtained.
Is efficiently obtained.
【００３４】一方、スリット５０を設けて構成した該注
射器１のハブ９には、図１１及び、図１２に示すよう
に、前記針挿入孔１２において注射針２６が挿入されて
おり、針挿入孔１２におけるハブ９と注射針２６との間
は、接着剤２７が充填されて固結された形で接着されて
いる。On the other hand, as shown in FIGS. 11 and 12, an injection needle 26 is inserted in the needle insertion hole 12 in the hub 9 of the syringe 1 having the slit 50, and the needle insertion hole is formed. An adhesive 27 is filled between the hub 9 and the injection needle 26 in 12 and is bonded in a solidified form.
【００３５】スリット５０を設けて構成した該注射器１
のピストン２９は、図１１に示すように、平板部３０
ａ、３０ａが十字状に交差した形で形成された矢印Ａ、
Ｂ方向に伸延した棒状のピストン本体３０を有してお
り、ピストン本体３０の平板部３０ａ、３０ａには、各
両側部より切欠き３１が計４ヵ所に形成されている。ピ
ストン本体３０には、矢印Ｂ側に外押圧板３２が設けら
れており、矢印Ａ側に内押圧板３３が設けられている。
内押圧板３３の矢印Ａ側には、パッキン支持部３５が設
けられており、パッキン支持部３５には、内押圧板３３
と一体的に設けられた円柱部３５ａが設けられている。
円柱部３５ａの矢印Ａ側には、前記ハブ挿着孔４ｂと等
しい外径をもつ挿入円柱部５３が設けられており、挿入
円柱部５３の矢印Ａ側には、ハブ係合部３６が設けられ
ている。ハブ係合部３６には、挿入円柱部５３と一体的
に設けられた円柱部３６ａが設けられており、円柱部３
６ａの矢印Ａ側には、半球状の挿入部３６ｂが設けられ
ている。また、ピストン２９には、外周部にヒダ４５が
形成された円柱部３９を有し、該円柱部３９の先端側
（矢印Ａ側）にテ−パ部４０が形成された形のパッキン
３７が設けられており、パッキン３７には、円柱部３９
側の端面３９ａからテ−パ部４０に向かって、前記パッ
キン支持部３５の円柱部３５ａの外径に等しい内径の第
一孔４１が設けられている。パッキン３７には、第一孔
４１の矢印Ａ側に連通連続した形で前記パッキン支持部
３５の挿入円柱部５３の外径に等しい内径の第二孔５５
が設けられており、第二孔５５はテ−パ部４０側に開口
している。なお、第一孔４１の矢印Ａ、Ｂ方向の長さ
は、円柱部３５ａの矢印Ａ、Ｂ方向の長さに等しく、第
二孔５５の矢印Ａ、Ｂ方向の長さは、挿入円柱部５３の
矢印Ａ、Ｂ方向の長さよりも短い。以上のように構成さ
れたパッキン３７は、第一孔４１にパッキン支持部３５
の円柱部３５ａが挿入し、第二孔５５にパッキン支持部
３５の挿入円柱部５３が挿入する形で、パッキン支持部
３５に装着されている。また、パッキン３７が装着され
たピストン２９は、パッキン３７を矢印Ａ側に向ける形
でシリンジ本体２の主円筒部３に挿入されており、パッ
キン３７のヒダ４５及び、円柱部３９は矢印Ｄ方向に弾
性縮小した形で挿入されている。なお、主円筒部３の内
周面３ｃは滑らかであり、ピストン２９は、シリンジ本
体２内で摺動自在に挿入されている。The syringe 1 having the slit 50.
As shown in FIG. 11, the piston 29 of the
a and 30a are arrows A formed in a cross shape.
The piston main body 30 has a rod-shaped piston body 30 extending in the B direction, and the flat plate portions 30a, 30a of the piston main body 30 are provided with notches 31 at four positions from both side portions. The piston body 30 is provided with an outer pressing plate 32 on the arrow B side and an inner pressing plate 33 on the arrow A side.
A packing support portion 35 is provided on the arrow A side of the inner pressing plate 33, and the inner pressing plate 33 is provided on the packing support portion 35.
There is provided a columnar portion 35a integrally provided with the.
An insertion columnar portion 53 having an outer diameter equal to that of the hub insertion hole 4b is provided on the arrow A side of the columnar portion 35a, and a hub engaging portion 36 is provided on the arrow A side of the insertion columnar portion 53. Has been. The hub engaging portion 36 is provided with a columnar portion 36 a integrally formed with the insertion columnar portion 53, and the columnar portion 3
A hemispherical insertion portion 36b is provided on the arrow A side of 6a. Further, the piston 29 has a packing 37 having a cylindrical portion 39 having a fold 45 formed on the outer peripheral portion thereof, and a taper portion 40 formed on the tip end side (arrow A side) of the cylindrical portion 39. The packing 37 is provided with a cylindrical portion 39.
A first hole 41 having an inner diameter equal to the outer diameter of the columnar portion 35a of the packing support portion 35 is provided from the side end surface 39a toward the taper portion 40. In the packing 37, a second hole 55 having an inner diameter equal to the outer diameter of the insertion columnar portion 53 of the packing supporting portion 35 is formed so as to be communicated with the first hole 41 on the arrow A side.
Is provided, and the second hole 55 is open to the taper portion 40 side. The lengths of the first holes 41 in the directions of arrows A and B are equal to the lengths of the cylindrical portions 35a in the directions of arrows A and B, and the lengths of the second holes 55 in the directions of arrows A and B are the insertion cylindrical portions. It is shorter than the length of arrow 53 in the directions of arrows A and B. The packing 37 configured as described above has the packing support portion 35 in the first hole 41.
The columnar portion 35a is inserted and the insertion columnar portion 53 of the packing supporting portion 35 is inserted into the second hole 55, and is attached to the packing supporting portion 35. Further, the piston 29 having the packing 37 attached thereto is inserted into the main cylindrical portion 3 of the syringe body 2 with the packing 37 facing the arrow A side, and the fold 45 of the packing 37 and the columnar portion 39 are in the arrow D direction. It is inserted in the elastically reduced form. The inner peripheral surface 3c of the main cylindrical portion 3 is smooth, and the piston 29 is slidably inserted in the syringe body 2.
【００３６】スリット５０を設けて構成した注射器１は
以上のように構成されており、該注射器１の組立は次の
ように行う。即ち、まず、パッキン３７の可撓性を利用
して該パッキン３７の第一孔４１を広げた後、ピストン
２９のハブ係合部３６側を、パッキン３７の第一孔４１
側より矢印Ａ方向に挿入し、パッキン支持部３５の円柱
部３５ａが第一孔４１に挿入され、パッキン支持部３５
の挿入円柱部５３が第二孔４２に挿入される状態まで、
図１１に示すように、ピストン２９を挿入する（なお、
挿入円柱部５３は矢印Ｂ側の一部分みが、第二孔４２に
挿入される。）。その後、第一孔４１を広げていた手等
を放して、パッキン３７を自然状態に戻すことにより、
パッキン３７の挿着を完了させる。次いで、パッキン３
７を挿着したピストン２９を、シリンジ本体２に挿入す
る。ピストン２９の挿入は、該ピストン２９のパッキン
３７が挿着されている側を、シリンジ本体２の開口端部
３ａ側からシリンジ本体２の内部空間２ａに挿入する形
で行い、ピストン２９を矢印Ａ方向に押圧することによ
って、パッキン３７の円柱部３９及び、ヒダ４５の外径
を縮小させる形で行う。つまり、ピストン２９を矢印Ａ
方向に押圧して、パッキン３７を縮小変形させながら、
ピストン２９を主円筒部３に挿入し、パッキン３７のテ
−パ部４０が、シリンジ本体２のテ−パ部６の内部に整
合し挿入する位置までピストン２９を挿入させ、ピスト
ン２９の挿入を終える。なお、パッキン３７のテ−パ部
４０が、シリンジ本体２のテ−パ部６の内部に整合し挿
入した状態では、ピストン２９のパッキン支持部３５の
挿入円柱部５３がハブ挿着部４のハブ挿着孔４ｂ内に挿
入されている。The syringe 1 having the slit 50 is constructed as described above, and the syringe 1 is assembled as follows. That is, first, the flexibility of the packing 37 is utilized to widen the first hole 41 of the packing 37, and then the hub engaging portion 36 side of the piston 29 is moved toward the first hole 41 of the packing 37.
From the side in the direction of arrow A, the columnar portion 35a of the packing support portion 35 is inserted into the first hole 41, and the packing support portion 35 is inserted.
Until the insertion cylindrical portion 53 of is inserted into the second hole 42,
As shown in FIG. 11, insert the piston 29 (note that
A part of the insertion columnar portion 53 on the arrow B side is inserted into the second hole 42. ). After that, by releasing the hand or the like that has expanded the first hole 41 and returning the packing 37 to the natural state,
The insertion of the packing 37 is completed. Next, packing 3
The piston 29 with 7 attached is inserted into the syringe body 2. The piston 29 is inserted by inserting the piston 29 into the inner space 2a of the syringe body 2 from the side of the opening 3a of the syringe body 2 where the packing 37 is inserted. By pressing in the direction, the outer diameter of the columnar portion 39 of the packing 37 and the fold 45 is reduced. That is, move the piston 29 to the arrow A
Pressing in the direction to shrink and deform the packing 37,
The piston 29 is inserted into the main cylindrical portion 3, the taper portion 40 of the packing 37 is inserted into the taper portion 6 of the syringe main body 2, and the piston 29 is inserted to such a position that the piston 29 is inserted. Finish. When the taper portion 40 of the packing 37 is aligned and inserted into the taper portion 6 of the syringe body 2, the insertion columnar portion 53 of the packing support portion 35 of the piston 29 is inserted into the hub insertion portion 4. It is inserted into the hub insertion hole 4b.
【００３７】次いで、ハブ挿着部４の端壁８の孔８ａ側
よりハブ９を、ハブ挿着孔４ｂに挿着する。即ち、ハブ
９を、該ハブ９の矢印Ｂ側の端面１０ｂを、端壁８の孔
８ａに整合させて、そのまま矢印Ｂ方向に該ハブ９を押
圧する。ところで、ハブ挿着部４の端壁８側には、上述
したように、３つの前記スリット５０が設けられてお
り、ハブ挿着部４の端壁８側は３つのハブ挿着部片５２
に分割されている。また、押圧することにより、該ハブ
９の面取り部１０ｄと端壁８の孔８ａに面したテ−パ状
の壁面５６とが押圧して当接して、３つのハブ挿着部片
５２には、これらハブ挿着部片５２を矢印Ｃ方向に弾性
屈曲変形させようとする作用力が働く。ハブ挿着部片５
２は、構造上、小円筒部７のうちの分割されていない円
筒状の部分等に比べて、矢印Ｃ方向の作用力に対して矢
印Ｃ方向に弾性屈曲変形しやすく、よって、ハブ９を押
圧するに従って、ハブ挿着部片５２は矢印Ｃ方向に弾性
屈曲変形し、孔８ａの径が拡大される。ハブ９を更に押
圧して、ハブ挿着部片５２を弾性屈曲変形させ、孔８ａ
の径をハブ９の主円柱部１０の外径まで拡大させて、ハ
ブ９を主円柱部１０より、ハブ挿着孔４ｂに挿入する。
ハブ９を更に押圧して、主円柱部１０を完全にハブ挿着
孔４ｂに挿入し、ハブ９の主円柱部１０の端面１０ａ
を、端壁８の矢印Ｂ側の壁面８ｂに密接させる位置でハ
ブ９の押圧挿入を停止する。主円柱部１０の端面１０ａ
が、端壁８の壁面８ｂに密接した位置では、小円柱部１
１は、最小径が該小円柱部１１の外径よりやや大きい孔
８ａに貫通挿入している。なお、ハブ挿着部４のハブ止
リブ７ｄと、ハブ９のハブ止溝１０ｅとは、上述したよ
うに、互いに整合対応した位置に存在しており、ハブ止
リブ７ｄのシ−ル部７ｇ、７ｇと、ハブ止溝１０ｅの開
口端部１０ｈ、１０ｈによって互いに当接する形で係合
している。以上のように、シリンジ本体２に対するハブ
９の挿着を終了する。なお、上述したように、ハブ９
は、該ハブ９のハブ止溝１０ｅと小円筒部７のハブ止リ
ブ７ｄとの間で、各力が互いに釣り合った形で、ハブ挿
着部４に固定されている。また、ハブ９は、前記ピスト
ン２９の係合部３６の挿入部３６ｂが、該挿入部３６ｂ
の球面３６ｃ側を、該ハブ９に設けられたピストン係合
孔２０の第三テ−パ孔２５に面した壁面２５ａに接する
形で存在している。また、シリンジ本体２に対するハブ
９の挿着作業は、ハブ９を押圧して挿着すればよく、複
雑な組立操作を伴わず容易である。Next, the hub 9 is inserted into the hub insertion hole 4b from the hole 8a side of the end wall 8 of the hub insertion portion 4. That is, the end surface 10b of the hub 9 on the arrow B side is aligned with the hole 8a of the end wall 8, and the hub 9 is pressed in the direction of the arrow B as it is. By the way, as described above, the three slits 50 are provided on the end wall 8 side of the hub insertion portion 4, and the three hub insertion pieces 52 are provided on the end wall 8 side of the hub insertion portion 4.
Is divided into Further, when pressed, the chamfered portion 10d of the hub 9 and the taper-shaped wall surface 56 of the end wall 8 facing the hole 8a are pressed and brought into contact with each other. The acting force acts to elastically bend and deform the hub insertion piece 52 in the direction of arrow C. Hub insertion piece 5
2 is structurally easier to be elastically bent and deformed in the arrow C direction with respect to the acting force in the arrow C direction, as compared to the undivided cylindrical portion of the small cylindrical portion 7 or the like. As it is pressed, the hub insertion piece 52 is elastically bent and deformed in the direction of arrow C, and the diameter of the hole 8a is enlarged. The hub 9 is further pressed to elastically bend and deform the hub insertion piece 52 so that the hole 8a
The diameter of is expanded to the outer diameter of the main columnar portion 10 of the hub 9, and the hub 9 is inserted from the main columnar portion 10 into the hub insertion hole 4b.
By further pressing the hub 9, the main cylindrical portion 10 is completely inserted into the hub insertion hole 4b, and the end surface 10a of the main cylindrical portion 10 of the hub 9 is
Is pressed against the wall surface 8b of the end wall 8 on the arrow B side, and the insertion of the hub 9 by pressing is stopped. End surface 10a of the main cylindrical portion 10
However, at the position close to the wall surface 8b of the end wall 8, the small cylindrical portion 1
In No. 1, the smallest diameter is inserted through the hole 8a which is slightly larger than the outer diameter of the small cylindrical portion 11. As described above, the hub stop rib 7d of the hub insertion portion 4 and the hub stop groove 10e of the hub 9 are present at positions corresponding to each other, and the seal portion 7g of the hub stop rib 7d is present. , 7g and the open ends 10h, 10h of the hub stop groove 10e are engaged with each other so as to abut each other. As described above, the insertion of the hub 9 into the syringe body 2 is completed. As described above, the hub 9
Between the hub stop groove 10e of the hub 9 and the hub stop rib 7d of the small cylindrical portion 7 are fixed to the hub insertion portion 4 in a form in which the respective forces are balanced with each other. Further, in the hub 9, the insertion portion 36b of the engagement portion 36 of the piston 29 is
The side of the spherical surface 36c is in contact with the wall surface 25a of the piston engaging hole 20 provided in the hub 9 facing the third taper hole 25. Further, the hub 9 can be inserted into the syringe body 2 by pressing the hub 9, and the hub 9 can be easily attached without complicated assembling operation.
【００３８】次いで、ハブ９の針挿入孔１２に注射針２
６を挿入し接着する。つまり、注射針２６を、図１２に
示すように、該注射針２６の後端２６ｂ側より、針挿入
孔１２に矢印Ｂ方向に挿入し、該後端２６ｂが、針挿入
孔１２の奥のハブ９による壁面１０ｆに当接するまで挿
入する。挿入の後、針挿入孔１２におけるハブ９と注射
針２６との間の隙間に接着剤２７を充填して、該接着剤
２７を固結させ、ハブ９に対する注射針２６の挿入接着
が完了する。注射針２６の挿入接着完了をもって、スリ
ット５０が設けられて構成された該注射器１の組立てが
完了する。なお、注射針２６を予めハブ９に装着した状
態で、該注射針２６の装着されたハブ９をシリンジ本体
２に装着してもよい。また、スリット５０が設けられて
構成された注射器１の組立ては、上述のように、大部分
の作業（即ち、注射針２６の挿入固定の作業を除いてた
全ての作業）が、押圧することによって行われるため、
複雑な作業を伴わず容易である。更に、ハブ９は、ピス
トン２９がシリンジ本体２に挿入された後に挿着される
ので、ハブ９の挿着作業に際して塵埃等が内部空間２ａ
に進入することは極力防止される。Next, the injection needle 2 is inserted into the needle insertion hole 12 of the hub 9.
Insert 6 and glue. That is, as shown in FIG. 12, the injection needle 26 is inserted into the needle insertion hole 12 in the direction of the arrow B from the rear end 26b side of the injection needle 26, and the rear end 26b is located at the back of the needle insertion hole 12. The hub 9 is inserted until it contacts the wall surface 10f. After the insertion, the gap between the hub 9 and the injection needle 26 in the needle insertion hole 12 is filled with the adhesive 27 to solidify the adhesive 27, and the insertion and adhesion of the injection needle 26 to the hub 9 is completed. . Upon completion of insertion and adhesion of the injection needle 26, the assembly of the syringe 1 having the slit 50 is completed. The hub 9 to which the injection needle 26 is attached may be attached to the syringe body 2 while the injection needle 26 is attached to the hub 9 in advance. In addition, in assembling the syringe 1 including the slit 50, most of the work (that is, all work except the work of inserting and fixing the injection needle 26) is pressed as described above. Because it is done by
Easy without complicated work. Furthermore, since the hub 9 is inserted and inserted after the piston 29 is inserted into the syringe main body 2, dust and the like are removed from the internal space 2a when the hub 9 is inserted and attached.
It is prevented as much as possible to enter.
【００３９】スリット５０が設けられて構成された注射
器１は、以上のように構成され、また以上のように組立
てられており、該注射器１を使用し、使用の後、廃棄す
るには、スリット５０がない第１番目の実施例における
注射器１と略同様である。The syringe 1 provided with the slit 50 is constructed as described above and assembled as described above. To use the syringe 1 and dispose of it after use, the slit 1 is used. It is substantially the same as the syringe 1 in the first embodiment without the 50.
【００４０】以上のように、スリット５０を設けて構成
した注射器１においては、ハブ９とシリンジ本体２との
接続構造は、ハブ９のハブ本体９０を、端壁８の孔８ａ
側からハブ挿着孔４ｂに対して挿着し得るようにして構
成されている。また、ハブ９とシリンジ本体２との接続
構造は、ハブ挿着部４の孔８ａの周囲に３個のスリット
５０を形成して構成されている。また、注射器１を組立
る際には、シリンジ本体２にピストン２９を挿入し、ハ
ブ９を、端壁８の孔８ａ側より前記ハブ挿着孔４ｂに対
して挿入し、ハブ９を、該ハブ９のハブ止溝１０ｅと前
記ハブ挿着部４のハブ止リブ７ｄとを互いに弾性的に係
合させる形で設置し、前記ハブ９の針挿入孔１２に、注
射針２６を挿入接続する（又は、注射針２６の装着され
たハブ９をハブ挿着孔４ｂに挿入装着する。）。As described above, in the syringe 1 having the slit 50, the connection structure of the hub 9 and the syringe main body 2 has the hub main body 90 of the hub 9 and the hole 8a of the end wall 8.
It is configured so that it can be inserted into the hub insertion hole 4b from the side. The connection structure between the hub 9 and the syringe body 2 is formed by forming three slits 50 around the hole 8 a of the hub insertion portion 4. Moreover, when assembling the syringe 1, the piston 29 is inserted into the syringe body 2, the hub 9 is inserted into the hub insertion hole 4b from the hole 8a side of the end wall 8, and the hub 9 is The hub stop groove 10e of the hub 9 and the hub stop rib 7d of the hub insertion portion 4 are installed so as to elastically engage each other, and the injection needle 26 is inserted and connected to the needle insertion hole 12 of the hub 9. (Alternatively, the hub 9 with the injection needle 26 attached is inserted into the hub insertion hole 4b and attached.).
【００４１】よって、注射器１を組立る際には、注射器
１のハブ９は、孔８ａ側より軸心Ｐ１方向に押圧して挿
入する形でハブ挿着孔４ｂに挿着され、シリンジ本体２
の内部空間２ａを通さずに挿着される。従って、シリン
ジ本体２の主円筒部３等は静電気等を極力帯びず、内部
空間２ａは塵埃等の進入が極力防止される。Therefore, when assembling the syringe 1, the hub 9 of the syringe 1 is inserted into the hub insertion hole 4b by pushing in the direction of the axis P1 from the hole 8a side and inserted into the hub insertion hole 4b.
Is inserted without passing through the internal space 2a. Therefore, the main cylinder portion 3 and the like of the syringe body 2 are not charged with static electricity as much as possible, and the ingress of dust and the like is prevented as much as possible in the internal space 2a.
【００４２】なお、上述の第１番目、第２番目の実施例
で説明したハブ９は、何れもハブ９のシ−ル部を溝即
ち、ハブ止溝１０ｅの形で構成した。しかし、ハブ９の
シ−ル部は、ハブ９のハブ本体９０の外周面１０ｉ側に
環状に形成され、ハブ挿着孔４ｂの内面と係合し得る形
で形成されれば、どのように形成されていてもよく、従
って、図１６或いは、図１７或いは、図１８に示すよう
に、ハブ９のシ−ル部を突条の形で形成することも可能
である。In each of the hubs 9 described in the first and second embodiments, the seal portion of the hub 9 is formed in the shape of a groove, that is, a hub stop groove 10e. However, if the seal portion of the hub 9 is formed in an annular shape on the outer peripheral surface 10i side of the hub body 90 of the hub 9 and can be engaged with the inner surface of the hub insertion hole 4b, how is it formed? However, it is also possible to form the seal portion of the hub 9 in the form of a ridge, as shown in FIG. 16, FIG. 17 or FIG.
【００４３】まず、図１６に示される実施例では、ハブ
挿着孔４ｂの内面に、環状のシ−ル溝５９が設けられた
ハブ挿着孔４ｂに挿着されるハブ９を、ハブ９の主円柱
部１０の外周面１０ｉ側に、環状に形成され、シ−ル溝
５９の幅よりも広い幅をもったシ−ルリブ５７を設けた
形で構成している（なお、ハブ挿着孔４ｂにはスリット
５０が設けられていてもよい。）。従って、ハブ９のシ
リンジ本体２に対する接続構造は、ハブ挿着孔４ｂに、
ハブ９の主円柱部１０が、ハブ挿着孔４ｂに挿入され、
また該ハブ挿着孔４ｂから主円筒部３内に引き抜き得る
ように着脱自在に挿入装着されており、主円柱部１０の
シ−ルリブ５７が、ハブ挿着孔４ｂのシ−ル溝５９に対
して、所定のシ−ル圧で、前述した図１６断面における
点接触によるシ−ル状態を維持した形で接触係合してい
る。また、シ−ル溝５９以外のハブ挿着孔４ｂの内周面
７ａと、主円筒部１０との間には隙間空間４９が形成さ
れている。First, in the embodiment shown in FIG. 16, the hub 9 is inserted into the hub insertion hole 4b having an annular seal groove 59 formed on the inner surface of the hub insertion hole 4b. On the outer peripheral surface 10i side of the main cylindrical portion 10, a seal rib 57 having a width wider than the width of the seal groove 59 is provided (the hub is attached). A slit 50 may be provided in the hole 4b.). Therefore, the connection structure of the hub 9 to the syringe body 2 is as follows:
The main cylindrical portion 10 of the hub 9 is inserted into the hub insertion hole 4b,
Further, the hub is inserted into and detachably attached to the main cylindrical portion 3 from the hub insertion hole 4b, and the seal rib 57 of the main cylindrical portion 10 is fitted in the seal groove 59 of the hub insertion hole 4b. On the other hand, at a predetermined seal pressure, they are in contact with each other while maintaining the seal state by point contact in the cross section of FIG. Further, a clearance space 49 is formed between the inner peripheral surface 7 a of the hub insertion hole 4 b other than the seal groove 59 and the main cylindrical portion 10.
【００４４】また、図１７に示される実施例では、ハブ
挿着孔４ｂの内周面７ａにハブシ−ル部が内周面７ａと
同一平面となる形で形成された、従って、ハブ挿着孔４
ｂの内面に溝や突条等がないハブ挿着孔４ｂに挿着され
るハブ９を、ハブ９の主円柱部１０の外周面１０ｉ側
に、環状に、シ−ルリブ５７を設けた形で構成している
（なお、ハブ挿着孔４ｂにはスリット５０が設けられて
いてもよい。）。従って、ハブ９のシリンジ本体２に対
する接続構造は、ハブ挿着孔４ｂに、ハブ９の主円柱部
１０が、ハブ挿着孔４ｂに挿入され、また該ハブ挿着孔
４ｂから主円筒部３内に引き抜き得るように着脱自在に
挿入装着されており、主円柱部１０のシ−ルリブ５７
が、ハブ挿着孔４ｂの内周面７ａに対して、所定のシ−
ル圧で接触係合している。また、ハブ挿着孔４ｂの内周
面７ａと、シ−ルリブ５７以外の主円柱部１０との間に
隙間空間４９が形成されている。In the embodiment shown in FIG. 17, the hub seal portion is formed on the inner peripheral surface 7a of the hub insertion hole 4b so as to be flush with the inner peripheral surface 7a. Hole 4
The hub 9 inserted into the hub insertion hole 4b having no groove or protrusion on the inner surface of b is provided with an annular seal rib 57 on the outer peripheral surface 10i side of the main cylindrical portion 10 of the hub 9. (The slit 50 may be provided in the hub insertion hole 4b.). Therefore, in the connection structure of the hub 9 to the syringe body 2, the main cylindrical portion 10 of the hub 9 is inserted into the hub insertion hole 4b, and the main cylindrical portion 3 is inserted into the hub insertion hole 4b. It is detachably inserted and attached so that it can be pulled out, and the seal rib 57 of the main cylindrical portion 10 is attached.
Is attached to the inner peripheral surface 7a of the hub insertion hole 4b by a predetermined seal.
It is in contact engagement with the pressure. A clearance space 49 is formed between the inner peripheral surface 7a of the hub insertion hole 4b and the main columnar portion 10 other than the seal rib 57.
【００４５】また、図１８に示される実施例では、ハブ
挿着孔４ｂの内周面７ａにハブシ−ル部が内周面７ａと
同一平面となる形で形成された、従って、該ハブ挿着孔
４ｂの内面に溝や突条等がないハブ挿着孔４ｂに挿着さ
れるハブ９が、次のように構成されている。即ち、ハブ
９の主円柱部１０は、主円柱部１０の軸心Ｐ１方向のう
ち矢印Ｂ方向に外径が縮小するテ−パ状の複数個（図１
８では５個）の主円柱部片６０によって仮想的に構成さ
れており、複数個の主円柱部片６０は矢印Ａ、Ｂ方向に
直列する形で一体的に形成されている。つまり、ハブ９
の主円柱部１０の外周面１０ｉ側には、複数個の主円柱
部片６０によって形成される突条形状の複数のヒダ部６
１が、環状に設けられている。従って、ハブ９の主円柱
部１０は、ハブ挿着孔４ｂに挿着されることにより、主
円筒部１０の複数のヒダ部６１が、ハブ挿着孔４ｂの内
周面７ａに対して、所定のシ−ル圧で接触係合してい
る。また、ハブ挿着孔４ｂの内周面７ａと、複数のヒダ
部６１以外の主円筒部１０との間に隙間空間４９が形成
されている。なお、主円柱部１０は、端壁８の孔８ａよ
り矢印Ｂ方向にハブ挿着孔４ｂに挿入するが、挿入の
際、ヒダ部６１が矢印Ｂ方向にテ−パ状に形成されてい
ることから、ハブ９は円滑にハブ挿着孔４ｂ内に挿入さ
れ得る。また、主円柱部１０は、テ−パ状のヒダ部６１
により容易にハブ挿着孔４ｂに挿入されるため、ハブ挿
着孔４ｂにスリット５０が設けられたシリンジ本体２は
勿論、ハブ挿着孔４ｂにスリット５０がないシリンジ本
体２にも適用できる。Further, in the embodiment shown in FIG. 18, the hub seal portion is formed on the inner peripheral surface 7a of the hub insertion hole 4b so as to be flush with the inner peripheral surface 7a. The hub 9 that is inserted into the hub insertion hole 4b, which has no groove, protrusion, or the like on the inner surface of the attachment hole 4b, is configured as follows. That is, the main columnar portion 10 of the hub 9 has a plurality of taper shapes whose outer diameter is reduced in the arrow B direction of the axis P1 direction of the main columnar portion 10 (see FIG. 1).
8 is composed of five main columnar pieces 60 virtually, and the plurality of main columnar pieces 60 are integrally formed in series in the directions of arrows A and B. That is, hub 9
On the outer peripheral surface 10i side of the main columnar portion 10, the plurality of ridge-shaped folds 6 formed by the plurality of main columnar pieces 60 are formed.
1 is provided in a ring shape. Therefore, the main cylinder portion 10 of the hub 9 is inserted into the hub insertion hole 4b, so that the plurality of folds 61 of the main cylinder portion 10 are separated from the inner peripheral surface 7a of the hub insertion hole 4b. It is in contact engagement with a predetermined seal pressure. A gap space 49 is formed between the inner peripheral surface 7 a of the hub insertion hole 4 b and the main cylindrical portion 10 other than the plurality of fold portions 61. The main columnar portion 10 is inserted into the hub insertion hole 4b through the hole 8a of the end wall 8 in the arrow B direction. At the time of insertion, the fold portion 61 is formed in a taper shape in the arrow B direction. Therefore, the hub 9 can be smoothly inserted into the hub insertion hole 4b. In addition, the main columnar portion 10 has a taper-shaped fold portion 61.
Since it can be easily inserted into the hub insertion hole 4b, the present invention can be applied not only to the syringe main body 2 having the slit 50 provided in the hub insertion hole 4b but also to the syringe main body 2 having no slit 50 in the hub insertion hole 4b.
【００４６】なお、上述の実施例のうち、ハブ本体９０
を端壁８の孔８ａ側よりハブ挿入孔４ｂに挿入して構成
した注射器１の組立て方法では、シリンジ本体２にピス
トン２９を挿入し、シリンジ本体２にハブ９を挿着し、
ハブ９に注射針２６を挿入接続して構成したが、該組立
て方法は、シリンジ本体２にピストン２９を挿入した
後、予め注射針２６が挿入接続されているハブ９を、該
シリンジ本体２に挿着して構成されてもよい。In the above embodiment, the hub body 90
In the assembling method of the syringe 1 configured by inserting the end wall 8 into the hub insertion hole 4b from the hole 8a side, the piston 29 is inserted into the syringe body 2, the hub 9 is attached to the syringe body 2,
Although the injection needle 26 is inserted and connected to the hub 9, the assembling method is such that after inserting the piston 29 into the syringe body 2, the hub 9 to which the injection needle 26 is previously inserted and connected is connected to the syringe body 2. It may be inserted and configured.
【発明の効果】以上説明したように、本発明のうち第一
の発明は、ピストン２９等のピストンが摺動自在に装着
されたシリンジ本体２等のシリンジ本体を有し、該シリ
ンジ本体の先端に、孔８ａ等の注射針導入穴を介して筒
状に形成されたハブ挿着孔４ｂ等のハブ挿着穴を形成
し、該ハブ挿着穴に対して着脱自在に挿着される注射器
用のハブ９等のハブにおいて、前記ハブは、前記ハブ挿
着穴に挿入され、また該ハブ挿着穴から前記シリンジ本
体内に引き抜き得る筒状のハブ本体９０等のハブ本体を
有し、前記ハブ本体の外周部に、ハブ止溝１０ｅ或い
は、シ−ルリブ５７或いは、ヒダ部６１等のシ−ル部
を、前記ハブ挿着穴の内面と係合し得るように、環状に
形成し、前記ハブ本体の前記シ−ル部以外の部分の外径
を、前記ハブ挿着穴の対応する部分の内径よりも小なる
形に形成し、前記ハブ本体の端面１１ａ等の一端に、注
射針２６等の注射針を挿入し得る針挿入孔１２等の針挿
入孔を、前記ハブ本体の軸心方向に設け、前記ハブ本体
に、流通孔１９等の流通孔を、前記針挿入孔と前記シリ
ンジ本体内とを軸心方向に連通し得る形で設け、前記ハ
ブ本体の端面１０ｂ等の他端に、ピストン係合孔２０等
のハブ側係合手段を、前記ピストンと係合自在に設けて
構成した。従って、ハブ本体の前記シ−ル部以外の部分
の外径を、前記ハブ挿着穴の対応する部分の内径よりも
小なる形に形成したので、ハブとハブ装着穴とはシール
部を介してのみ接触させることが可能となり、ハブ装着
穴に対して脱着が容易でしかも所定のシール性能を発揮
することの出来るハブを提供することが出来、組立てに
際したハブの設置動作及び、使用後の針の注射器内への
引き込み動作を円滑かつ容易に行なうことが可能とな
る。また、本発明のうち第二の発明は、第一の発明のハ
ブを、ハブ止溝１０ｅ等のシ−ル部を溝の形で形成して
構成したので、第一の発明の効果に加えて、ハブ外周部
に何らの突起も形成されることがないので、ハブのハブ
挿入穴に対する挿入設置がより容易となる。。また、本
発明のうち第三の発明は、第一の発明のハブを、シ−ル
リブ５７或いは、ヒダ部６１等のシ−ル部を突条の形で
形成して構成したので、第一の発明の効果に加えて、突
条の形状を各種用意することにより、ハブ側でハブのシ
ール性能をコントロールすることが可能となり、注射器
の用途に応じたハブの提供が可能となる。また、本発明
のうち第四の発明は、先端に孔８ａ等の注射針導入穴を
介してハブ挿着孔４ｂ等のハブ挿着穴が形成されたシリ
ンジ本体２等のシリンジ本体を有するシリンジ１００等
のシリンジに対して、注射器用ハブを着脱自在に接続し
たハブの接続構造において、前記ハブ挿着穴に第一の発
明のハブのハブ本体を、前記ハブ挿着穴に挿入され、ま
た該ハブ挿着穴から前記シリンジ本体内に引き抜き得よ
うにる着脱自在に挿入装着し、前記ハブ挿着穴の内周面
７ａ等の内周面にハブ止リブ７ｄ或いは、シ−ル溝５９
或いは、内周面７ａ等のハブシ−ル部を環状に設けると
共に、前記ハブ本体のハブ止溝１０ｅ或いは、シ−ルリ
ブ５７或いは、ヒダ部６１等のシ−ル部を該ハブシール
部に対して所定の復元力Ｆｂｃ或いは、復元力Ｆｃ等の
所定の接触圧力で接触係合させた形で設け、前記ハブシ
−ル部以外のハブ挿着穴の内周面７ａ等の内周面と、前
記ハブ本体の外周面１０ｉ等の外周面との間に、隙間空
間４９等の間隙を形成して構成したので、第一の発明の
効果に加えて、ハブとハブ装着穴内周面とは、シール部
及びハブシール部を介してのみ接触する形となり、ハブ
装着穴に対してハブの脱着を容易に行なうことが出来、
注射器の組立て作業を効率よく簡単に行なうことが出来
る。しかも、使用後の針の注射器内への引き込みに際し
ても、ハブと内周面との接触がシール部及びハブシール
部のみであることから、小さな引込み力でハブを注射器
内部に引き込むことが可能となり、使用後の注射器の廃
棄作業を円滑かつ容易に行なうことが可能となる。ま
た、本発明のうち第五の発明は、先端に孔８ａ等の注射
針導入穴を介してハブ挿着孔４ｂ等のハブ挿着穴が形成
されたシリンジ本体２等のシリンジ本体を有するシリン
ジ１００等のシリンジに対して、注射器用ハブを着脱自
在に接続したハブの接続構造において、前記ハブ挿着穴
に第二の発明のハブのハブ本体を、前記ハブ挿着穴に挿
入され、また該ハブ挿着穴から前記シリンジ本体内に引
き抜き得ようにる着脱自在に挿入装着し、前記ハブ挿着
穴の内周面７ａ等の内周面に突条が環状に形成された形
のハブ止リブ７ｄ等のハブシ−ル部を設けると共に、前
記ハブ本体のハブ止溝１０ｅ等のシ−ル部を該ハブシー
ル部に対して所定の復元力Ｆｂｃ或いは、復元力Ｆｃ等
の所定の接触圧力で接触係合させた形で設け、前記ハブ
シ−ル部以外のハブ挿着穴の内周面と、前記ハブ本体の
外周面１０ｉ等の外周面との間に、隙間空間４９等の間
隙を形成して構成したので、第２の発明の効果に加え
て、第４の発明と同様の効果を発揮することが出来る。
また、本発明のうち第六の発明は、先端に孔８ａ等の注
射針導入穴を介してハブ挿着孔４ｂ等のハブ挿着穴が形
成されたシリンジ本体２等のシリンジ本体を有するシリ
ンジ１００等のシリンジに対して、注射器用ハブを着脱
自在に接続したハブの接続構造において、前記ハブ挿着
穴に第三の発明のハブのハブ本体を、前記ハブ挿着穴に
挿入され、また該ハブ挿着穴から前記シリンジ本体内に
引き抜き得ようにる着脱自在に挿入装着し、前記ハブ挿
着穴の内周面７ａ等の内周面に溝が環状に形成された形
のシ−ル溝５９等のハブシ−ル部を設けると共に、前記
ハブ本体のシ−ルリブ５７等のシ−ル部を該ハブシール
部に対して所定の復元力Ｆｂｃ或いは、復元力Ｆｃ等の
所定の接触圧力で接触係合させた形で設け、前記ハブシ
−ル部以外のハブ挿着穴の内周面と、前記ハブ本体の外
周面１０ｉ等の外周面との間に、隙間空間４９等の間隙
を形成して構成したので、第３の発明の効果に加えて、
第４の発明と同様の効果を発揮することが出来る。ま
た、本発明のうち第七の発明は、第五又は第六の発明に
よるハブの接続構造において、ハブ止溝１０ｅ或いは、
シ−ルリブ５７等の前記シール部の幅とハブ止リブ７ｄ
或いは、シ−ル溝５９等の前記ハブシール部の幅が相違
するようにして構成したので、それぞれの発明の効果に
加えて、シール部とハブシール部が係合する際に、その
接触部位をハブの軸方向断面において点接触状態とする
ことが出来、面接触によるシールに比して高度のシール
性能を発揮させることが出来る。また、本発明のうち第
八の発明は、先端に孔８ａ等の注射針導入穴を介してハ
ブ挿着孔４ｂ等のハブ挿着穴が形成されたシリンジ本体
２等のシリンジ本体を有するシリンジ１００等のシリン
ジに対して、注射器用ハブを着脱自在に接続したハブの
接続構造において、前記ハブ挿着穴に第三の発明のハブ
のハブ本体を、前記ハブ挿着穴に挿入され、また該ハブ
挿着穴から前記シリンジ本体内に引き抜き得ようにる着
脱自在に挿入装着し、前記ハブ挿着穴の内周面７ａ等の
内周面と同一の面上に内周面７ａ等のハブシール部を設
けると共に、前記ハブ本体のシ−ルリブ５７或いは、ヒ
ダ部６１等のシ−ル部を該ハブシール部に対して所定の
復元力Ｆｂｃ或いは、復元力Ｆｃ等の所定の接触圧力で
接触係合させた形で設け、前記ハブシ−ル部以外のハブ
挿着穴の内周面と、前記ハブ本体の外周面１０ｉ等の外
周面との間に、隙間空間４９等の間隙を形成して構成し
たので、第３の発明の効果に加えて、第４の発明と同様
の効果を発揮することが出来る。また、本発明のうち第
九の発明は、第四又は第五又は第六又は第八の発明のハ
ブの接続構造において、前記ハブ本体を前記注射針導入
穴側から前記ハブ挿着穴に対して挿着し得るようにして
構成したので、それぞれの発明の効果に加えて、ハブ装
着時には、ピストンをシリンジ本体に装着した状態で行
なうことが可能となり、ハブ装着時に塵埃がシリンジ本
体内に侵入する可能性を低めることが出来、衛生的であ
る。また、本発明のうち第十の発明は、第四又は第五又
は第六又は第八の発明のハブの接続構造において、前記
シリンジ本体の注射針導入穴の周囲に１個以上のスリッ
ト５０等のスリットを形成して構成したので、それぞれ
の発明の効果に加えて、当該スリットの弾性変形を利用
してハブをハブ装着穴側から容易に挿入装着することが
出来るばかりか、ハブ装着時には、ピストンをシリンジ
本体に装着した状態で行なうことが可能となり、ハブ装
着時に塵埃がシリンジ本体内に侵入する可能性を低める
ことが出来、衛生的である。また、本発明のうち第１１
乃至第１４の発明は、第４乃至第６及び第８の発明の接
続構造をなすシリンジ１００等のシリンジ及びハブ９等
のハブを有し、前記シリンジ本体に、該シリンジ本体の
内部空間２ａ等の内部を軸方向に閉塞する形のピストン
２９等のピストンを、前記シリンジ本体に対して軸方向
に移動自在に設け、前記ピストンに、前記ハブのピスト
ン係合孔２０等のハブ側係合手段と係合し得るハブ係合
部３６等のピストン側係合手段を、前記ハブ側係合手段
に対向する形で設け、前記ハブの針挿入孔１２等の針挿
入孔に、注射針２６等の注射針を設けて構成したので、
第４の発明の効果に加えて、使用後にハブをピストンの
ピストン側係合手段と係合させて、シリンジ内部に注射
針と共に引き抜くことが可能となり、通常の注射器を操
作する場合と同じピストンの押し引き動作のみで、使用
済みの注射針を容易にシリンジ内部に引き込むことが出
来、誰にでも操作が容易で誤操作の危険性がなく、安全
性が高い。また、本発明のうち第十五の発明は、第十二
又は第十三の発明の注射器において、前記シール部の幅
と前記ハブシール部の幅が相違するようにして構成した
ので、それぞれの発明の効果に加えて、シール部とハブ
シール部が係合する際に、その接触部位をハブの軸方向
断面において点接触状態とすることが出来、面接触によ
るシールに比して高度のシール性能を発揮させることが
出来る。また、本発明のうち第十六の発明は、第十一又
は第十二又は第十三又は第十四の発明の注射器におい
て、前記ピストンはピストン本体３０等のピストン本体
が外押圧板３２等の操作部と内押圧板３３等の薬液押圧
部の間で折取り自在に構成したので、それぞれの発明の
効果に加えて、ピストンを折り取ることにより、以後注
射針をシリンジ内部に保持したピストン先端部をシリン
ジ内にピストン先端部に保持させた形で、外部から操作
不能な状態で、留置することが出来、以後の廃棄処理作
業に際した安全性が高い。また、本発明のうち第十七の
発明は、第十六の発明の注射器において、前記シリンジ
本体に係止リブ３ｂ等のピストンストッパを、前記ピス
トンの内押圧板３３等の薬液押圧部が前記シリンジ本体
から抜け出さないように形成して構成したので、第１６
の発明の効果に加えて、注射針と共にピストンを移動さ
せる際に、不用意にピストンがシリンジ本体から抜け出
て、使用済みの注射針により、操作者を傷つけてしまう
ことが防止され、安全性が高い。また、本発明のうち第
十八及び十九の発明は、第十六及び１７の発明の注射器
において、前記ピストンのピストン本体３０等のピスト
ン本体には切欠き３１等の折取り用切欠きが形成されて
いるので、それぞれの発明の効果に加えて、ピストンの
折り取り動作を該切り欠きを利用して容易に行なうこと
が出来る。また、本発明のうち第二十の発明は、第十九
の発明の注射器において、前記切り欠きは、前記ピスト
ンが前記ピストンストッパに当接した際に、前記シリン
ジ本体の開口端部３ａ等の端部に位置し得るように形成
したので、第１９の発明の効果に加えて、ピストンをピ
ストンストッパに当たるまで引き、直ちに端部を利用し
てピストンを折り取ることが出来、注射針のシリンジ内
への収納及び留置動作を連続的に行なうことが出来、効
率的な注射及び廃棄作業を行なうことが出来る。また、
本発明のうち第二十一の発明は、第十一又は第十二又は
第十三又は第十四の発明の注射器を組立る際、ハブを、
前記シリンジ本体のピストン装着側より前記ハブ挿着穴
に対して挿入し、前記ハブを、該ハブのシ−ル部と前記
ハブ挿着部のハブシ−ル部とを互いに弾性的に係合させ
る形で設置し、前記シリンジに、ピストンを挿入し、前
記ハブの針挿入孔に、注射針を挿入接続して構成したの
で、それぞれに発明の効果に加えて、ハブをピストン装
着側から挿入する形で組み立てることが可能となる。ま
た、本発明のうち第二十二の発明は、第十一又は第十二
又は第十三又は第十四の発明の注射器を組立る際、前記
シリンジに、ピストンを挿入し、ハブを、前記シリンジ
本体の注射針導入穴側より前記ハブ挿着穴に対して挿入
し、前記ハブを、該ハブのシ−ル部と前記ハブ挿着部の
ハブシ−ル部とを互いに弾性的に係合させる形で設置
し、前記ハブの針挿入孔に、注射針を挿入接続して構成
したので、それぞれの効果に加えて、ハブ装着時には、
ピストンをシリンジ本体に装着した状態で行なうことが
可能となり、ハブ装着時に塵埃がシリンジ本体内に侵入
する可能性を低めることが出来、衛生的である。また、
本発明のうち第二十三の発明は、第十一又は第十二又は
第十三又は第十四の発明の注射器を組立る際、前記シリ
ンジに、ピストンを挿入し、注射針の装着された状態の
ハブを、前記シリンジ本体の注射針導入穴側より前記ハ
ブ挿着穴に対して挿入し、前記ハブを、該ハブのシ−ル
部と前記ハブ挿着部のハブシ−ル部とを互いに弾性的に
係合させる形で設置して構成したので、それぞれの効果
に加えて、ハブ装着時には、ピストンをシリンジ本体に
装着した状態で行なうことが可能となり、ハブ装着時に
塵埃がシリンジ本体内に侵入する可能性を低めることが
出来、衛生的である。また、ハブのハブ装着穴への装着
時には、既に注射針がハブに装着されているので、組立
て済みの状態のシリンジに対し注射針の装着という余分
な作業を行なうことを回避することが出来、組立て作業
を迅速に行なうことが出来る。また、本発明のうち第二
十四の発明は、第十一又は第十二又は第十三又は第十四
の発明の注射器を組立る際、前記シリンジ本体の注射針
導入穴の周囲に１個以上のスリットを形成しておき、前
記シリンジに、ピストンを挿入し、注射針の装着された
状態のハブを、前記シリンジ本体の注射針導入穴側より
前記ハブ挿着穴に対して挿入し、前記ハブを、該ハブの
シ−ル部と前記ハブ挿着部のハブシ−ル部とを互いに弾
性的に係合させる形で設置して構成したので、それぞれ
の効果に加えて、ハブ装着時には、ピストンをシリンジ
本体に装着した状態で行なうことが可能となり、ハブ装
着時に塵埃がシリンジ本体内に侵入する可能性を低める
ことが出来、衛生的である。また、ハブのハブ装着穴へ
の装着時には、既に注射針がハブに装着されているの
で、組立て済みの状態のシリンジに対し注射針の装着と
いう余分な作業を行なうことを回避することが出来、組
立て作業を迅速に行なうことが出来る。また、スリット
の弾性変形を利用してハブをハブ装着穴側から容易に挿
入装着することが出来るので、ハブの装着作業を迅速か
つ容易に行なうことができる。また、本発明のうち第二
十五の発明は、第十一又は第十二又は第十三又は第十四
の発明の注射器を組立る際、前記シリンジ本体の注射針
導入穴の周囲に１個以上のスリットを形成しておき、前
記シリンジに、ピストンを挿入し、ハブを、前記シリン
ジ本体の注射針導入穴側より前記ハブ挿着穴に対して挿
入し、前記ハブを、該ハブのシ−ル部と前記ハブ挿着部
のハブシ−ル部とを互いに弾性的に係合させる形で設置
し、前記ハブの針挿入孔に、注射針を挿入接続して構成
したので、それぞれの効果に加えて、ハブ装着時には、
ピストンをシリンジ本体に装着した状態で行なうことが
可能となり、ハブ装着時に塵埃がシリンジ本体内に侵入
する可能性を低めることが出来、衛生的である。また、
スリットの弾性変形を利用してハブをハブ装着穴側から
容易に挿入装着することが出来るので、ハブの装着作業
を迅速かつ容易に行なうことができる。As described above, the first aspect of the present invention has the syringe body such as the syringe body 2 to which the piston such as the piston 29 is slidably mounted, and the tip of the syringe body. A syringe in which a hub insertion hole such as a hub insertion hole 4b formed in a tubular shape is formed through an injection needle introduction hole such as hole 8a, and the hub insertion hole is detachably inserted into the hub insertion hole. In a hub such as a hub 9 for use with a hub, the hub has a hub body such as a tubular hub body 90 that is inserted into the hub insertion hole and that can be pulled out from the hub insertion hole into the syringe body. A hub stop groove 10e, a seal rib 57, or a seal portion such as a fold portion 61 is formed in an annular shape on the outer peripheral portion of the hub body so as to engage with the inner surface of the hub insertion hole. , The outer diameter of a portion of the hub body other than the seal portion is defined as a pair of hub insertion holes. And a needle insertion hole such as a needle insertion hole 12 into which an injection needle such as an injection needle 26 can be inserted at one end of the end surface 11a of the hub body. Provided in the axial direction, the hub body is provided with a flow hole such as a flow hole 19 so as to allow the needle insertion hole and the inside of the syringe body to communicate with each other in the axial direction, such as the end surface 10b of the hub body. A hub side engaging means such as a piston engaging hole 20 is provided at the other end so as to be engageable with the piston. Therefore, since the outer diameter of the portion of the hub body other than the seal portion is formed to be smaller than the inner diameter of the corresponding portion of the hub insertion hole, the hub and the hub mounting hole are separated by the seal portion. It is possible to provide a hub that can be brought into contact only with the hub mounting hole, can be easily attached to and detached from the hub mounting hole, and can exhibit a predetermined sealing performance. It is possible to smoothly and easily perform the operation of retracting the needle into the syringe. In addition, in the second invention of the present invention, since the hub of the first invention is configured by forming the seal portion such as the hub stop groove 10e in the shape of a groove, in addition to the effect of the first invention. Since no protrusion is formed on the outer peripheral portion of the hub, the hub can be inserted and installed in the hub insertion hole more easily. . A third aspect of the present invention is the hub of the first aspect of the invention, in which the seal rib 57 or the seal portion such as the fold portion 61 is formed in the shape of a ridge. In addition to the effect of the invention described above, by preparing various shapes of protrusions, it becomes possible to control the sealing performance of the hub on the hub side, and it is possible to provide the hub according to the application of the syringe. A fourth aspect of the present invention is a syringe having a syringe body such as a syringe body 2 having a hub insertion hole such as a hub insertion hole 4b formed at the tip through an injection needle introduction hole such as a hole 8a. In a hub connection structure in which a syringe hub is detachably connected to a syringe such as 100, the hub main body of the hub of the first invention is inserted into the hub insertion hole, and It is detachably inserted and mounted so that it can be pulled out into the syringe body from the hub insertion hole, and the hub stop rib 7d or the seal groove 59 is attached to the inner peripheral surface such as the inner peripheral surface 7a of the hub insertion hole.
Alternatively, the hub seal portion such as the inner peripheral surface 7a is provided in an annular shape, and the hub stop groove 10e of the hub body, the seal rib 57, or the seal portion such as the fold portion 61 is provided to the hub seal portion. The inner peripheral surface such as the inner peripheral surface 7a of the hub insertion hole other than the hub seal portion is provided so as to be brought into contact with each other at a predetermined contact pressure such as a predetermined restoring force Fbc or a restoring force Fc, and Since the gap such as the gap space 49 is formed between the hub body and the outer peripheral surface such as the outer peripheral surface 10i, in addition to the effect of the first invention, the hub and the hub mounting hole inner peripheral surface are sealed. Part and the hub seal part only come into contact with each other, and the hub can be easily attached to and detached from the hub mounting hole.
The syringe assembly work can be performed efficiently and easily. Moreover, even when the needle is retracted into the syringe after use, since the contact between the hub and the inner peripheral surface is only at the seal portion and the hub seal portion, the hub can be retracted into the syringe with a small retracting force. It is possible to smoothly and easily dispose of the syringe after use. A fifth aspect of the present invention is a syringe having a syringe body such as a syringe body 2 having a hub insertion hole such as a hub insertion hole 4b formed at the tip through an injection needle introduction hole such as a hole 8a. In a hub connection structure in which a syringe hub is detachably connected to a syringe such as 100, the hub body of the hub of the second invention is inserted into the hub insertion hole, and the hub main body of the second invention is inserted into the hub insertion hole. A hub having a shape in which the hub is formed by being detachably inserted into the syringe main body through the hub insertion hole, and the protrusion is formed annularly on the inner peripheral surface such as the inner peripheral surface 7a of the hub insertion hole. A hub seal portion such as a stop rib 7d is provided, and a seal portion such as the hub stop groove 10e of the hub body is brought into contact with the hub seal portion by a predetermined restoring force Fbc or a restoring force Fc. It is provided in the form of contact engagement with, and other than the hub seal part. Since a gap such as a gap space 49 is formed between the inner peripheral surface of the insertion hole and the outer peripheral surface such as the outer peripheral surface 10i of the hub body, in addition to the effect of the second invention, The same effect as the fourth invention can be exhibited.
A sixth aspect of the present invention is a syringe having a syringe body such as a syringe body 2 having a hub insertion hole such as a hub insertion hole 4b formed at the tip through an injection needle introduction hole such as a hole 8a. In a hub connection structure in which a syringe hub is detachably connected to a syringe such as 100, the hub body of the hub of the third invention is inserted into the hub insertion hole, and It is detachably inserted into the syringe body through the hub insertion hole so that it can be pulled out, and the groove is formed in an annular shape on the inner peripheral surface such as the inner peripheral surface 7a of the hub insertion hole. A hub seal portion such as a groove 59 is provided, and a seal portion such as a seal rib 57 of the hub body is pressed against the hub seal portion by a predetermined restoring force Fbc or a restoring force Fc. Hubs other than the hub seal part And the inner peripheral surface of the Chakuana, between the outer peripheral surface of the outer peripheral surface 10i and the like of the hub body, since it is configured to form a gap such as the gap space 49, in addition to the effects of the third invention,
The same effect as the fourth invention can be exhibited. A seventh invention of the present invention is the hub connecting groove 10e or the hub stop groove 10e in the hub connecting structure according to the fifth or sixth invention.
The width of the seal portion such as the seal rib 57 and the hub stop rib 7d
Alternatively, since the width of the hub seal portion such as the seal groove 59 is different, in addition to the effects of the respective inventions, when the seal portion and the hub seal portion are engaged with each other, the contact portion thereof is the hub. It is possible to have a point contact state in the axial cross section, and it is possible to exert a high degree of sealing performance as compared with a seal by surface contact. Further, the eighth invention of the present invention is a syringe having a syringe body such as a syringe body 2 having a hub insertion hole such as a hub insertion hole 4b formed at the tip through an injection needle introduction hole such as a hole 8a. In a hub connection structure in which a syringe hub is detachably connected to a syringe such as 100, the hub body of the hub of the third invention is inserted into the hub insertion hole, and The hub is inserted into the syringe body so that it can be pulled out from the hub insertion hole, and the hub body is detachably inserted and mounted on the same surface as the inner peripheral surface 7a of the hub insertion hole. A hub seal portion is provided, and a seal rib 57 of the hub body or a seal portion such as a fold portion 61 is brought into contact with the hub seal portion at a predetermined restoring force Fbc or a restoring contact force Fc. Provided in the engaged form, except for the hub seal part Since a gap such as a gap space 49 is formed between the inner peripheral surface of the insertion hole and the outer peripheral surface 10i of the hub body, in addition to the effect of the third invention, The same effect as the fourth invention can be exhibited. Further, a ninth aspect of the present invention is the hub connection structure according to the fourth or fifth or sixth or eighth aspect, wherein the hub body is inserted into the hub insertion hole from the injection needle introduction hole side. In addition to the effects of each invention, it is possible to attach the hub to the syringe body with the piston attached, and dust enters the syringe body when the hub is attached. It is possible to reduce the possibility of doing it and it is hygienic. The tenth invention of the present invention is, in the hub connecting structure according to the fourth or fifth or sixth or eighth invention, one or more slits 50 or the like around the injection needle introducing hole of the syringe body. In addition to the effects of each invention, the hub can be easily inserted and mounted from the hub mounting hole side by utilizing the elastic deformation of the slit, and at the time of hub mounting, The piston can be mounted on the syringe body, and the possibility of dust entering the syringe body when the hub is mounted can be reduced, which is hygienic. The eleventh aspect of the present invention
The fourteenth to fourteenth inventions have a syringe such as the syringe 100 and a hub such as the hub 9 having the connection structure of the fourth to sixth and eighth inventions, and the syringe body has an internal space 2a and the like in the syringe body. A piston such as a piston 29 that axially closes the inside of the syringe is provided movably in the axial direction with respect to the syringe body, and the piston has a hub side engaging means such as a piston engaging hole 20 of the hub. A piston-side engaging means such as a hub engaging portion 36 capable of engaging with the hub-side engaging means is provided so as to face the hub-side engaging means, and the injection needle 26 or the like is provided in the needle insertion hole 12 or the like of the hub. Since it was configured by providing the injection needle of
In addition to the effect of the fourth invention, it is possible to engage the hub with the piston side engaging means of the piston after use, and to withdraw the needle into the syringe together with the injection needle, which is the same as when operating a normal syringe. The used injection needle can be easily pulled into the inside of the syringe only by pushing and pulling, and it is easy for anyone to operate, there is no risk of erroneous operation, and safety is high. The fifteenth invention of the present invention is the syringe according to the twelfth or thirteenth invention, wherein the width of the seal portion and the width of the hub seal portion are different from each other. In addition to the effect of the above, when the seal part and the hub seal part are engaged, the contact part can be made into a point contact state in the axial cross section of the hub, and a higher sealing performance than the surface contact seal can be achieved. Can be demonstrated. The sixteenth invention of the present invention is the syringe according to the eleventh or twelfth or thirteenth or fourteenth invention, wherein the piston has a piston body such as a piston body 30 and an outer pressing plate 32 or the like. Since it is configured such that it can be freely folded between the operating portion of the device and the liquid pressing portion such as the inner pressing plate 33, in addition to the effects of the respective inventions, the piston can be broken off so that the injection needle is held inside the syringe. With the tip of the piston held by the piston tip, it can be placed in an inoperable state from the outside, and is highly safe for subsequent disposal operations. A seventeenth aspect of the present invention is the syringe according to the sixteenth aspect, wherein the syringe main body is provided with a piston stopper such as a locking rib 3b, and the internal pressure plate 33 of the piston is provided with a chemical liquid pressing portion. Since it is formed and configured so as not to come out of the syringe body,
In addition to the effect of the invention of (1), when the piston is moved together with the injection needle, the piston is prevented from accidentally slipping out of the syringe body, and the used injection needle is prevented from injuring the operator, and safety is improved. high. Further, the eighteenth and nineteenth inventions of the present invention are the syringes of the sixteenth and seventeenth inventions, wherein the piston body such as the piston body 30 of the piston has a notch for breaking such as the notch 31. Since it is formed, in addition to the effects of the respective inventions, the breaking operation of the piston can be easily performed by utilizing the notch. In addition, the twenty-first invention of the present invention is the syringe of the nineteenth invention, wherein the notch has an opening end 3a or the like of the syringe body when the piston abuts the piston stopper. Since it is formed so that it can be positioned at the end, in addition to the effect of the nineteenth invention, the piston can be pulled until it hits the piston stopper, and the piston can be immediately broken off using the end. It is possible to continuously perform storage and indwelling operations in and into, and perform efficient injection and disposal work. Also,
The twenty-first invention of the present invention relates to a hub when the syringe of the eleventh or twelfth or thirteenth or fourteenth invention is assembled,
The syringe body is inserted from the piston mounting side into the hub insertion hole, and the hub is elastically engaged with the hub seal portion and the hub seal portion. In addition to the effects of the invention, the hub is inserted from the piston mounting side because the piston is inserted into the syringe, and the injection needle is inserted and connected to the needle insertion hole of the hub. It is possible to assemble in shape. In addition, the twenty-second invention of the present invention is, when assembling the injector of the eleventh or twelfth or thirteenth or fourteenth invention, inserting the piston into the syringe, and the hub, The syringe body is inserted into the hub insertion hole from the side of the injection needle introduction hole, and the hub is elastically engaged with the seal portion of the hub and the hub seal portion of the hub insertion portion. They are installed in a combined form, and an injection needle is inserted and connected in the needle insertion hole of the hub, so in addition to each effect, when mounting the hub,
The piston can be mounted on the syringe body, and the possibility of dust entering the syringe body when the hub is mounted can be reduced, which is hygienic. Also,
The twenty-third invention of the present invention is such that, when assembling the injector of the eleventh or twelfth or thirteenth or fourteenth invention, a piston is inserted into the syringe, and an injection needle is attached. The hub in the opened state is inserted into the hub insertion hole from the injection needle introduction hole side of the syringe body, and the hub is the seal portion of the hub and the hub seal portion of the hub insertion portion. In addition to each effect, it is possible to do with the piston attached to the syringe body when the hub is attached, and dust is not attached when the hub is attached. It is possible to reduce the possibility of invading inside and is hygienic. Further, since the injection needle is already attached to the hub when the hub is attached to the hub attachment hole, it is possible to avoid performing extra work of attaching the injection needle to the syringe in the assembled state, Assembly work can be performed quickly. The twenty-fourth aspect of the present invention is such that, when assembling the injector of the eleventh or twelfth or thirteenth or fourteenth aspect, the first invention is provided around the injection needle introducing hole of the syringe body. After forming more than one slit, insert the piston into the syringe, insert the hub with the injection needle attached into the hub insertion hole from the injection needle introduction hole side of the syringe body. Since the hub is installed and configured so that the seal portion of the hub and the hub seal portion of the hub insertion portion are elastically engaged with each other, in addition to the respective effects, the hub mounting At times, it is possible to perform the operation with the piston attached to the syringe body, which can reduce the possibility of dust entering the syringe body when the hub is attached, which is hygienic. Further, since the injection needle is already attached to the hub when the hub is attached to the hub attachment hole, it is possible to avoid performing extra work of attaching the injection needle to the syringe in the assembled state, Assembly work can be performed quickly. Further, since the hub can be easily inserted and mounted from the hub mounting hole side by utilizing the elastic deformation of the slit, the mounting work of the hub can be performed quickly and easily. The twenty-fifth aspect of the present invention is such that, when assembling the syringe of the eleventh or twelfth or thirteenth or fourteenth aspect of the present invention, there is provided 1 With more than one slit formed, the piston is inserted into the syringe, the hub is inserted into the hub insertion hole from the injection needle introduction hole side of the syringe body, and the hub is The seal portion and the hub seal portion of the hub insertion portion are installed so as to be elastically engaged with each other, and an injection needle is inserted and connected to the needle insertion hole of the hub. In addition to the effect, when installing the hub,
The piston can be mounted on the syringe body, and the possibility of dust entering the syringe body when the hub is mounted can be reduced, which is hygienic. Also,
Since the hub can be easily inserted and mounted from the hub mounting hole side by utilizing the elastic deformation of the slit, the hub mounting operation can be performed quickly and easily.
以下、本発明の実施例を図面に基づき説明する。 Embodiments of the present invention will be described below with reference to the drawings.
【図１】図１は、本発明による注射器の一例を示した模
式断面図である。FIG. 1 is a schematic cross-sectional view showing an example of a syringe according to the present invention.
【図２】図２は、図１に示す注射器のハブ付近における
拡大断面図である。FIG. 2 is an enlarged cross-sectional view near the hub of the syringe shown in FIG.
【図３】図３は、図２に示すハブ挿着部付近の自然状態
の図である。FIG. 3 is a view of a natural state near a hub insertion portion shown in FIG.
【図４】図４は、図２に示すハブ挿着部とハブとの間の
力学的関係を示した図である。FIG. 4 is a diagram showing a mechanical relationship between the hub insertion portion and the hub shown in FIG.
【図５】図５は、図１に示すハブとピストンの位置関係
を示した図である。5 is a diagram showing a positional relationship between the hub and the piston shown in FIG.
【図６】図６は、図２に示すハブ挿着部に、ハブを挿着
する工程を示した図である。FIG. 6 is a diagram showing a step of inserting the hub into the hub inserting portion shown in FIG. 2;
【図７】図７は、図２に示すハブ挿着部に、ハブを挿着
する工程を示した図である。FIG. 7 is a diagram showing a step of inserting the hub into the hub inserting portion shown in FIG.
【図８】図８は、図２に示すハブ挿着部とハブとの間の
力学的関係を示した図である。FIG. 8 is a diagram showing a mechanical relationship between the hub insertion portion and the hub shown in FIG.
【図９】図９は、図２に示すハブに、ピストンを係合さ
せる工程を示した図である。FIG. 9 is a diagram showing a step of engaging a piston with the hub shown in FIG. 2.
【図１０】図１０は、図１に示す注射器において、ピス
トンの折り取りを行っている図である。FIG. 10 is a view showing the piston of the syringe shown in FIG. 1 being broken off.
【図１１】図１１は、本発明による注射器のうち、シリ
ンジにスリットが設けられて構成された注射器の一例を
示した模式断面図である。FIG. 11 is a schematic cross-sectional view showing an example of the syringe according to the present invention, which is configured by providing a slit in the syringe.
【図１２】図１２は、図１１に示す注射器のハブ付近に
おける拡大断面図である。12 is an enlarged cross-sectional view near the hub of the syringe shown in FIG.
【図１３】図１３は、図１１に示すハブ挿着部付近の自
然状態の図である。13 is a view of a natural state near the hub insertion portion shown in FIG.
【図１４】図１４は、図１３のＩ矢視図である。FIG. 14 is a view on arrow I of FIG.
【図１５】図１５は、図１２に示すハブ挿着部とハブと
の間の力学的関係を示した図である。FIG. 15 is a diagram showing a mechanical relationship between the hub insertion portion and the hub shown in FIG. 12.
【図１６】図１６は、本発明による注射器のうち、ハブ
側にシ−ルリブが形成され、ハブ挿入孔側にシ−ル溝が
形成された注射器の一例におけるハブ付近の拡大断面図
である。FIG. 16 is an enlarged cross-sectional view of the vicinity of the hub in an example of the syringe of the present invention in which a seal rib is formed on the hub side and a seal groove is formed on the hub insertion hole side. .
【図１７】図１７は、本発明による注射器のうち、ハブ
側にシ−ルリブが形成され、ハブ挿入孔側のハブシ−ル
部がハブ挿入孔の内周面に一致する形の注射器の一例に
おけるハブ付近の拡大断面図である。FIG. 17 is an example of the syringe according to the present invention in which a seal rib is formed on the hub side, and a hub seal portion on the hub insertion hole side is aligned with the inner peripheral surface of the hub insertion hole. 3 is an enlarged cross-sectional view of the vicinity of the hub in FIG.
【図１８】図１８は、本発明による注射器のうち、ハブ
側にヒダ部が形成され、ハブ挿入孔側のハブシ−ル部が
ハブ挿入孔の内周面に一致する形の注射器の一例におけ
るハブ付近の拡大断面図である。FIG. 18 shows an example of the syringe of the present invention in which a fold is formed on the hub side and the hub seal on the hub insertion hole side is aligned with the inner peripheral surface of the hub insertion hole. It is an expanded sectional view near a hub.
１……注射器 ２……シリンジ本体 ２ａ……内部（内部空間） ３ａ……端部（開口端部） ３ｂ……ピストンストッパ（係止リブ） ４ｂ……ハブ挿入穴（ハブ挿入孔） ７ａ……内周面、或いは、シ−ル部（内周面） ７ｄ……ハブ止リブ（ハブシ−ル部） ８ａ……注射針導入穴（孔） ９……ハブ １１ａ……一端（端面） １０ｂ……他端（端面） １０ｅ……シ−ル部（ハブ止溝） １０ｉ……外周面 １２……針挿入孔 １９……流通孔 ２０……ハブ側係合手段（ピストン係合孔） ２６……注射針 ２９……ピストン ３０……ピストン本体 ３１……切欠き ３２……操作部（外押圧板） ３３……薬液押圧部（内押圧板） ３６……ピストン側係合手段（ハブ係合部） ４９……間隙（隙間空間） ５０……スリット ５７……シ−ル部（シ−ルリブ） ５９……ハブシ−ル部（シ−ル溝） ６１……シ−ル部（ヒダ部） ９０……ハブ本体 １００……シリンジ 1 ... Syringe 2 ... Syringe body 2a ... Inside (internal space) 3a ... End (open end) 3b ... Piston stopper (locking rib) 4b ... Hub insertion hole (hub insertion hole) 7a ... ... Inner peripheral surface or seal part (inner peripheral surface) 7d ... Hub stop rib (hub seal part) 8a ... Injection needle introduction hole (hole) 9 ... Hub 11a ... One end (end surface) 10b ...... The other end (end face) 10e …… Seal part (hub stop groove) 10i …… Outer peripheral face 12 …… Needle insertion hole 19 …… Flow hole 20 …… Hub side engagement means (piston engagement hole) 26 ...... Injection needle 29 ...... Piston 30 ...... Piston body 31 ...... Notch 32 ...... Operating part (outer pressing plate) 33 ...... Chemical solution pressing part (inner pressing plate) 36 ...... Piston side engaging means (hub engaging part) Joint part 49 ... Gap (gap space) 50 ... Slit 57 ... Seal part (seal rib) 9 ...... Habushi - le portion (sheet - Le groove) 61 ...... sheet - le portion (fold portions) 90 ...... hub body 100 ...... syringe
Claims (25)
本体を有し、該シリンジ本体の先端に、注射針導入穴を
介して筒状に形成されたハブ挿着穴を形成し、該ハブ挿
着穴に対して着脱自在に挿着される注射器用のハブにお
いて、 前記ハブは、前記ハブ挿着穴に挿入され、また該ハブ挿
着穴から前記シリンジ本体内に引き抜き得る筒状のハブ
本体を有し、 前記ハブ本体の外周部に、シ−ル部を、前記ハブ挿着穴
の内面と係合し得るように、環状に形成し、 前記ハブ本体の前記シ−ル部以外の部分の外径を、前記
ハブ挿着穴の対応する部分の内径よりも小なる形に形成
し、 前記ハブ本体の一端に、注射針を挿入し得る針挿入孔
を、前記ハブ本体の軸心方向に設け、 前記ハブ本体に、流通孔を、前記針挿入孔と前記シリン
ジ本体内とを軸心方向に連通し得る形で設け、 前記ハブ本体の他端に、ハブ側係合手段を、前記ピスト
ンと係合自在に設けて構成した注射器用のハブ。1. A syringe main body having a piston slidably mounted therein, and a hub insertion hole formed in a cylindrical shape through an injection needle introduction hole is formed at the tip of the syringe main body, and the hub is formed. A hub for a syringe that is detachably inserted into an insertion hole, wherein the hub is a tubular hub that is inserted into the hub insertion hole and that can be pulled out from the hub insertion hole into the syringe body. A main body, and a seal portion is formed in an annular shape on the outer peripheral portion of the hub main body so as to be able to engage with the inner surface of the hub insertion hole, and other than the seal portion of the hub main body. The outer diameter of the portion is formed to be smaller than the inner diameter of the corresponding portion of the hub insertion hole, and at one end of the hub body, a needle insertion hole into which an injection needle can be inserted is formed. The hub body, the hub body is provided with a flow hole, and the needle insertion hole and the syringe body are axially oriented. Provided in a form that communicatable, the other end of the hub body, the hub of the syringe to the hub-side engagement means, which is configured by providing freely the piston engages.
項１記載のハブ。2. The hub according to claim 1, wherein the seal portion is formed in the shape of a groove.
求項１記載のハブ。3. The hub according to claim 1, wherein the seal portion is formed in the shape of a ridge.
形成されたシリンジ本体を有するシリンジに対して、注
射器用ハブを着脱自在に接続したハブの接続構造におい
て、 前記ハブ挿着穴に請求項１記載のハブのハブ本体を、前
記ハブ挿着穴に挿入され、また該ハブ挿着穴から前記シ
リンジ本体内に引き抜き得ようにる着脱自在に挿入装着
し、 前記ハブ挿着穴の内周面にハブシ−ル部を環状に設ける
と共に、前記ハブ本体のシ−ル部を該ハブシール部に対
して所定の接触圧力で接触係合させた形で設け、 前記ハブシ−ル部以外のハブ挿着穴の内周面と、前記ハ
ブ本体の外周面との間に、間隙を形成して構成したハブ
の接続構造。4. A hub connection structure in which a syringe hub is detachably connected to a syringe having a syringe body having a hub insertion hole formed at a tip thereof through an injection needle introduction hole. The hub main body of the hub according to claim 1 is inserted into the hub insertion hole, and is detachably inserted into the syringe main body through the hub insertion hole. A hub seal portion is provided on the inner peripheral surface of the hole in an annular shape, and the seal portion of the hub body is provided in a form of contacting engagement with the hub seal portion at a predetermined contact pressure. A hub connecting structure in which a gap is formed between the inner peripheral surface of the hub insertion hole other than the above and the outer peripheral surface of the hub body.
形成されたシリンジ本体を有するシリンジに対して、注
射器用ハブを着脱自在に接続したハブの接続構造におい
て、 前記ハブ挿着穴に請求項２記載のハブのハブ本体を、前
記ハブ挿着穴に挿入され、また該ハブ挿着穴から前記シ
リンジ本体内に引き抜き得ようにる着脱自在に挿入装着
し、 前記ハブ挿着穴の内周面に突条が環状に形成された形の
ハブシ−ル部を設けると共に、前記ハブ本体のシ−ル部
を該ハブシール部に対して所定の接触圧力で接触係合さ
せた形で設け、 前記ハブシ−ル部以外のハブ挿着穴の内周面と、前記ハ
ブ本体の外周面との間に、間隙を形成して構成したハブ
の接続構造。5. A hub connecting structure in which a syringe hub is detachably connected to a syringe having a syringe body having a hub insertion hole formed at a tip thereof through an injection needle introduction hole. The hub main body of the hub according to claim 2 is inserted into the hub insertion hole into the hole, and is detachably inserted into the syringe main body through the hub insertion hole. A hub seal portion in which a protrusion is formed in an annular shape is provided on the inner peripheral surface of the hole, and the seal portion of the hub body is brought into contact engagement with the hub seal portion at a predetermined contact pressure. And a hub connecting structure configured by forming a gap between the inner peripheral surface of the hub insertion hole other than the hub seal portion and the outer peripheral surface of the hub body.
形成されたシリンジ本体を有するシリンジに対して、注
射器用ハブを着脱自在に接続したハブの接続構造におい
て、 前記ハブ挿着穴に請求項３記載のハブのハブ本体を、前
記ハブ挿着穴に挿入され、また該ハブ挿着穴から前記シ
リンジ本体内に引き抜き得ようにる着脱自在に挿入装着
し、 前記ハブ挿着穴の内周面に溝が環状に形成された形のハ
ブシ−ル部を設けると共に、前記ハブ本体のシ−ル部を
該ハブシール部に対して所定の接触圧力で接触係合させ
た形で設け、 前記ハブシ−ル部以外のハブ挿着穴の内周面と、前記ハ
ブ本体の外周面との間に、間隙を形成して構成したハブ
の接続構造。6. A hub connection structure in which a syringe hub is detachably connected to a syringe having a syringe body having a hub insertion hole formed at a tip thereof through an injection needle introduction hole, wherein the hub insertion The hub main body of the hub according to claim 3 is inserted into the hub insertion hole, and is detachably inserted into the syringe main body through the hub insertion hole. A hub seal portion in which a groove is formed in an annular shape is provided on the inner peripheral surface of the hole, and the seal portion of the hub body is brought into contact engagement with the hub seal portion at a predetermined contact pressure. A hub connection structure, wherein a gap is formed between the inner peripheral surface of the hub insertion hole other than the hub seal portion and the outer peripheral surface of the hub body.
が相違するようにして構成した請求項５又は６記載のハ
ブの接続構造。7. The hub connecting structure according to claim 5, wherein the width of the seal portion is different from the width of the hub seal portion.
形成されたシリンジ本体を有するシリンジに対して、注
射器用ハブを着脱自在に接続したハブの接続構造におい
て、 前記ハブ挿着穴に請求項３記載のハブのハブ本体を、前
記ハブ挿着穴に挿入され、また該ハブ挿着穴から前記シ
リンジ本体内に引き抜き得ようにる着脱自在に挿入装着
し、 前記ハブ挿着穴の内周面と同一の面上にハブシール部を
設けると共に、前記ハブ本体のシ−ル部を該ハブシール
部に対して所定の接触圧力で接触係合させた形で設け、 前記ハブシ−ル部以外のハブ挿着穴の内周面と、前記ハ
ブ本体の外周面との間に、間隙を形成して構成したハブ
の接続構造。8. A hub connection structure in which a syringe hub is detachably connected to a syringe having a syringe body having a hub insertion hole formed at a tip thereof through an injection needle introduction hole. The hub main body of the hub according to claim 3 is inserted into the hub insertion hole into the hole, and the hub main body is detachably inserted into the syringe main body through the hub insertion hole. The hub seal portion is provided on the same surface as the inner peripheral surface of the hole, and the seal portion of the hub body is provided in a form of being in contact with the hub seal portion at a predetermined contact pressure. A hub connection structure in which a gap is formed between the inner peripheral surface of the hub insertion hole other than the above portion and the outer peripheral surface of the hub body.
記ハブ挿着穴に対して挿着し得るようにして構成した請
求項４又は５又は６又は８記載のハブの接続構造。9. The hub connecting structure according to claim 4, wherein the hub body is configured to be inserted into the hub insertion hole from the injection needle introduction hole side.
に１個以上のスリットを形成して構成した請求項４又は
５又は６又は８記載のハブの接続構造。10. The hub connecting structure according to claim 4, wherein one or more slits are formed around the injection needle introducing hole of the syringe body.
及びハブを有し、 前記シリンジ本体に、該シリンジ本体の内部を軸方向に
閉塞する形のピストンを、前記シリンジ本体に対して軸
方向に移動自在に設け、 前記ピストンに、前記ハブのハブ側係合手段と係合し得
るピストン側係合手段を、前記ハブ側係合手段に対向す
る形で設け、 前記ハブの針挿入孔に、注射針を設けて構成した注射
器。11. A syringe having a connection structure according to claim 4, and a hub, wherein a piston for axially closing the interior of the syringe body is provided in the syringe body in the axial direction with respect to the syringe body. Movably provided on the piston, piston-side engaging means capable of engaging with the hub-side engaging means of the hub is provided so as to face the hub-side engaging means, , A syringe provided with an injection needle.
及びハブを有し、 前記シリンジ本体に、該シリンジ本体の内部を軸方向に
閉塞する形のピストンを、前記シリンジ本体に対して軸
方向に移動自在に設け、 前記ピストンに、前記ハブのハブ側係合手段と係合し得
るピストン側係合手段を、前記ハブ側係合手段に対向す
る形で設け、 前記ハブの針挿入孔に、注射針を設けて構成した注射
器。12. A syringe having a connection structure according to claim 5 and a hub, wherein a piston for axially closing the interior of the syringe body is provided in the syringe body in the axial direction with respect to the syringe body. Movably provided on the piston, piston-side engaging means capable of engaging with the hub-side engaging means of the hub is provided so as to face the hub-side engaging means, , A syringe provided with an injection needle.
及びハブを有し、 前記シリンジ本体に、該シリンジ本体の内部を軸方向に
閉塞する形のピストンを、前記シリンジ本体に対して軸
方向に移動自在に設け、 前記ピストンに、前記ハブのハブ側係合手段と係合し得
るピストン側係合手段を、前記ハブ側係合手段に対向す
る形で設け、 前記ハブの針挿入孔に、注射針を設けて構成した注射
器。13. A syringe and a hub having the connection structure according to claim 6, wherein a piston for axially closing the interior of the syringe body is provided in the syringe body in the axial direction with respect to the syringe body. Movably provided on the piston, piston-side engaging means capable of engaging with the hub-side engaging means of the hub is provided so as to face the hub-side engaging means, , A syringe provided with an injection needle.
及びハブを有し、 前記シリンジ本体に、該シリンジ本体の内部を軸方向に
閉塞する形のピストンを、前記シリンジ本体に対して軸
方向に移動自在に設け、 前記ピストンに、前記ハブのハブ側係合手段と係合し得
るピストン側係合手段を、前記ハブ側係合手段に対向す
る形で設け、 前記ハブの針挿入孔に、注射針を設けて構成した注射
器。14. A syringe having a connection structure according to claim 8 and a hub, wherein a piston for axially closing the interior of the syringe body is provided in the syringe body in the axial direction with respect to the syringe body. Movably provided on the piston, piston-side engaging means capable of engaging with the hub-side engaging means of the hub is provided so as to face the hub-side engaging means, , A syringe provided with an injection needle.
幅が相違するようにして構成した請求項１２又は１３記
載の注射器。15. The syringe according to claim 12, wherein the width of the seal portion is different from the width of the hub seal portion.
薬液押圧部の間で折取り自在に構成された請求項第１１
又１２又は１３又は１４記載の注射器。16. The piston body according to claim 11, wherein the piston body is configured to be capable of being broken between the operating portion and the chemical liquid pressing portion.
The syringe according to 12 or 13 or 14.
を、前記ピストンの薬液押圧部が前記シリンジ本体から
抜け出さないように形成して構成した請求項１６記載の
注射器。17. The syringe according to claim 16, wherein a piston stopper is formed in the syringe body so that a chemical solution pressing portion of the piston does not come out of the syringe body.
用切欠きが形成されている請求項１６記載の注射器。18. The syringe according to claim 16, wherein a breaking notch is formed in the piston body of the piston.
用切欠きが形成されている請求項１７記載の注射器。19. The syringe according to claim 17, wherein a notch for breaking is formed in the piston body of the piston.
ストンストッパに当接した際に、前記シリンジ本体の端
部に位置し得るように形成された請求項１９記載の注射
器。20. The syringe according to claim 19, wherein the notch is formed so as to be positioned at an end portion of the syringe body when the piston contacts the piston stopper.
載の注射器を組立る際、 ハブを、前記シリンジ本体のピストン装着側より前記ハ
ブ挿着穴に対して挿入し、 前記ハブを、該ハブのシ−ル部と前記ハブ挿着部のハブ
シ−ル部とを互いに弾性的に係合させる形で設置し、 前記シリンジに、ピストンを挿入して構成した注射器の
組立方法。21. When assembling the syringe according to claim 11, 12 or 13 or 14, a hub is inserted into the hub insertion hole from a piston mounting side of the syringe body, and the hub is the hub. And a hub seal portion of the hub insertion portion are elastically engaged with each other, and a piston is inserted into the syringe.
載の注射器を組立る際、 前記シリンジに、ピストンを挿入し、 ハブを、前記シリンジ本体の注射針導入穴側より前記ハ
ブ挿着穴に対して挿入し、 前記ハブを、該ハブのシ−ル部と前記ハブ挿着部のハブ
シ−ル部とを互いに弾性的に係合させる形で設置し、 前記ハブの針挿入孔に、注射針を挿入接続して構成した
注射器の組立方法。22. When assembling the injector according to claim 11, 12 or 13 or 14, a piston is inserted into the syringe, and a hub is inserted into the hub insertion hole from the injection needle introduction hole side of the syringe body. The hub is installed in such a manner that the seal portion of the hub and the hub seal portion of the hub insertion portion are elastically engaged with each other, and the hub is inserted into the needle insertion hole of the hub. A method for assembling a syringe configured by inserting and connecting a needle.
載の注射器を組立る際、 前記シリンジに、ピストンを挿入し、 注射針の装着された状態のハブを、前記シリンジ本体の
注射針導入穴側より前記ハブ挿着穴に対して挿入し、 前記ハブを、該ハブのシ−ル部と前記ハブ挿着部のハブ
シ−ル部とを互いに弾性的に係合させる形で設置して構
成した注射器の組立方法。23. When assembling the syringe according to claim 11, 12 or 13 or 14, a piston is inserted into the syringe, and a hub with an injection needle attached is attached to an injection needle introduction hole of the syringe body. The hub is inserted into the hub insertion hole from the side, and the hub is installed such that the seal portion of the hub and the hub seal portion of the hub insertion portion are elastically engaged with each other. Assembled syringe.
載の注射器を組立る際、 前記シリンジ本体の注射針導入穴の周囲に１個以上のス
リットを形成しておき、 前記シリンジに、ピストンを挿入し、 注射針の装着された状態のハブを、前記シリンジ本体の
注射針導入穴側より前記ハブ挿着穴に対して挿入し、 前記ハブを、該ハブのシ−ル部と前記ハブ挿着部のハブ
シ−ル部とを互いに弾性的に係合させる形で設置して構
成した注射器の組立方法。24. When assembling the syringe according to claim 11, 12 or 13 or 14, one or more slits are formed around the injection needle introducing hole of the syringe body, and a piston is attached to the syringe. The hub with the injection needle attached is inserted into the hub insertion hole from the injection needle introduction hole side of the syringe body, and the hub is inserted into the seal portion of the hub and the hub insertion hole. A method for assembling a syringe, wherein the hub seal portion of the attachment portion is elastically engaged with each other.
載の注射器を組立る際、 前記シリンジ本体の注射針導入穴の周囲に１個以上のス
リットを形成しておき、 前記シリンジに、ピストンを挿入し、 ハブを、前記シリンジ本体の注射針導入穴側より前記ハ
ブ挿着穴に対して挿入し、 前記ハブを、該ハブのシ−ル部と前記ハブ挿着部のハブ
シ−ル部とを互いに弾性的に係合させる形で設置し、 前記ハブの針挿入孔に、注射針を挿入接続して構成した
注射器の組立方法。25. When assembling the syringe according to claim 11, 12 or 13 or 14, one or more slits are formed around the injection needle introducing hole of the syringe body, and a piston is attached to the syringe. Insert the hub into the hub insertion hole from the injection needle introduction hole side of the syringe body, and insert the hub into the hub seal portion and the hub insertion portion hub seal portion. Are installed so as to be elastically engaged with each other, and an injection needle is inserted and connected to the needle insertion hole of the hub.
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5079184A JP2527703B2 (en) | 1993-03-12 | 1993-03-12 | Syringe and method of assembling syringe |
| DK94103444T DK0620018T3 (en) | 1993-03-12 | 1994-03-07 | Retractable needle syringe |
| DE69419959T DE69419959T2 (en) | 1993-03-12 | 1994-03-07 | Retractable needle syringe |
| ES94103444T ES2137274T3 (en) | 1993-03-12 | 1994-03-07 | RETRACTILE NEEDLE SYRINGE. |
| EP94103444A EP0620018B1 (en) | 1993-03-12 | 1994-03-07 | Retractable needle syringe |
| CA002118609A CA2118609A1 (en) | 1993-03-12 | 1994-03-09 | Hub for syringe, connecting structure of hub, syringe, syringe assembly and method of assembling syringe assembly |
| AU57750/94A AU687771B2 (en) | 1993-03-12 | 1994-03-11 | Hub for syringe, connecting structure of hub, syringe, syringe assembly and method of assembling syringe assembly |
| KR1019940004927A KR940021085A (en) | 1993-03-12 | 1994-03-12 | Syringe hub, hub connection structure, syringe, syringe and syringe assembly method |
| TW083108190A TW278043B (en) | 1993-03-12 | 1994-09-06 | |
| US08/531,670 US5772687A (en) | 1993-03-12 | 1995-09-21 | Hub for syringe, connecting structure of hub, syringe, syringe assembly and method of assembling syringe assembly |
| US08/616,830 US5968020A (en) | 1993-03-12 | 1996-03-15 | Syringe assembly |
| US08/681,708 US5810782A (en) | 1993-03-12 | 1996-07-29 | Hub for syringe, connecting structure of hub, syringe, syringe assembly and method of assembling syringe assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5079184A JP2527703B2 (en) | 1993-03-12 | 1993-03-12 | Syringe and method of assembling syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06261947A true JPH06261947A (en) | 1994-09-20 |
| JP2527703B2 JP2527703B2 (en) | 1996-08-28 |
Family
ID=13682898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5079184A Expired - Fee Related JP2527703B2 (en) | 1993-03-12 | 1993-03-12 | Syringe and method of assembling syringe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2527703B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06285167A (en) * | 1993-04-06 | 1994-10-11 | Yoshikuni Saito | Syringe for injector |
| JPWO2018180566A1 (en) * | 2017-03-31 | 2020-02-06 | テルモ株式会社 | Needle outer cylinder and method of manufacturing the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH021288A (en) * | 1987-01-12 | 1990-01-05 | Walter W Gloyer | Cover needle discarding type nonpollution free hypodermic injector |
| JPH0211164A (en) * | 1988-04-13 | 1990-01-16 | Habley Medical Technol Corp | Injector |
| JPH0397468A (en) * | 1989-06-15 | 1991-04-23 | Yong-Chul Bang | Safety syringe |
-
1993
- 1993-03-12 JP JP5079184A patent/JP2527703B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH021288A (en) * | 1987-01-12 | 1990-01-05 | Walter W Gloyer | Cover needle discarding type nonpollution free hypodermic injector |
| JPH0211164A (en) * | 1988-04-13 | 1990-01-16 | Habley Medical Technol Corp | Injector |
| JPH0397468A (en) * | 1989-06-15 | 1991-04-23 | Yong-Chul Bang | Safety syringe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06285167A (en) * | 1993-04-06 | 1994-10-11 | Yoshikuni Saito | Syringe for injector |
| JPWO2018180566A1 (en) * | 2017-03-31 | 2020-02-06 | テルモ株式会社 | Needle outer cylinder and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2527703B2 (en) | 1996-08-28 |
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