1290476 【發明所屬之技術領域】 本發明係關於一種回縮結構’尤其是指被運用在回縮式 安全注射針筒，使得使用過的注射針回縮進入注射針筒內蓋 自動將注射針之，而具有防範注射針意外凸出傷 人之功效。 • 【先前技術】 一般注射筒的組成包括一中空構造的外筒以及一推桿。 ' 其中該外筒一端可與注射針結合，且該外筒內部可供容置藥 液。該推桿一端接設有一活塞部插入在該外筒內腔，而另一 端露出該外筒。如此推動該推桿，可藉活塞部將藥液推出排 在該外筒一端上的針頭。 由於一般注射針筒並無收納該注射針的功能，所以必須 • 將針蓋回套在該注射針外，接著再將該注射針取下。於上述 動作中，必須小心回套該針蓋，若有不慎則會產生被針頭刺 ! 傷的情形。 β 台灣專利公告第394027號揭露一種安全注射針筒之構造 ，主要是在外筒內部配設由一針體固設在一針柄所構成之針 頭組。其中，該針柄底面形成兩側高低不同之卡止部，而該 相對的二卡止部中心位置形成一空穴部，且該空穴部內緣製 1290476 成勾狀構造。該推桿所設之一活塞體端面設一結合體，且該 推桿推向該針頭組可使該結合體進入該空穴部與該勾狀構造 形成勾合。隨著拉退該推桿可以將該針頭組拉進該外筒內部 ，而利用不等高的卡止部與該活塞表面的靠抵可以使該針頭 組傾斜。 ; 由於該圓周面是連續的壁面，而且該空穴部內緣又 形成勾狀構造，所以該針柄壁面不具彈性收縮的能力，因此 • 在結合體進入該空穴部與該勾狀構造形成勾合時，不等高的 卡止部勢必會抵止該結合體而阻止結合體繼續推進，如此則 . 與空穴部之勾合功能失效。因此，該案中該結合體與針柄卡 止部之接觸面，必須是一具有如活塞體有彈性收縮功能之端 面，據此利用該活塞體之彈性收縮之特性，使不等高之卡止 部推抵壓縮該活塞體，利用其彈性收縮之變形量來容納卡止 部，藉以完成勾合之動作。 ® 但眾所皆知，目前市面上所見之注射針筒，其活塞彈 性體並不一定完全涵蓋至活塞之前端面，仍有許多注射針筒BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retracting structure, in particular to a retractable safety syringe, such that a used needle is retracted into the inner surface of the syringe and the needle is automatically inserted. And it has the effect of preventing the injection needle from accidentally protruding and injuring people. • [Prior Art] The general syringe assembly consists of a hollow outer tube and a push rod. ' One end of the outer cylinder can be combined with the injection needle, and the inside of the outer cylinder can accommodate the medicine. One end of the push rod is connected with a piston portion inserted into the inner cavity of the outer cylinder, and the other end is exposed to the outer cylinder. By pushing the push rod in this way, the liquid can be pushed out of the needle on one end of the outer tube by the piston portion. Since the general syringe does not have the function of accommodating the needle, it is necessary to • return the needle cover to the outside of the needle and then remove the needle. In the above actions, the needle cover must be carefully put back, and if it is inadvertent, it will be damaged by the needle. The structure of a safety injection syringe is disclosed in the Japanese Patent Publication No. 394,027, which mainly comprises a needle set which is fixed by a needle body and fixed to a needle handle inside the outer cylinder. Wherein, the bottom surface of the needle handle forms a locking portion with different heights on both sides, and the center position of the opposite two locking portions forms a cavity portion, and the inner edge of the cavity portion is formed into a hook-like structure. One of the piston body end faces of the push rod is provided with a combined body, and the push rod is pushed toward the needle set to cause the combined body to enter the cavity portion to form a hook with the hook structure. The needle set can be pulled into the outer cylinder as the pusher is pulled back, and the needle set can be tilted by the abutment of the unequal locking portion with the piston surface. Since the circumferential surface is a continuous wall surface, and the inner edge of the cavity portion forms a hook-like structure, the wall surface of the needle handle does not have the ability to elastically contract, so that the combination body enters the cavity portion and forms a hook with the hook structure. At the same time, the locking portion of the unequal height is bound to resist the combination and prevent the combination from continuing to advance, and thus the function of hooking with the cavity portion is invalid. Therefore, in this case, the contact surface of the combined body and the locking portion of the needle handle must be an end surface having a function of elastic contraction, such as the piston body, thereby utilizing the elastic contraction characteristic of the piston body to make the card of the same height The stopper pushes and compresses the piston body, and the amount of deformation of the elastic contraction is used to accommodate the locking portion, thereby completing the hooking action. ® But it is well known that the syringes currently seen on the market do not necessarily cover the front end of the piston, and there are still many syringes.
I ，其活塞彈性體僅只於與注射針筒內腔接觸之外周表面，而 於活塞之前端面，係暴露著一射出成型之硬質塑膠材料，如 此一來，該案所提出之技術中，該高度較高之卡止部如首先 被抵止該於射出成型之硬質塑膠材料上時，根本無法進一步 使該結合體與空穴部結合，如此則推桿根本無法與針頭組勾 1290476 合而使針頭組回縮至外筒內腔，構成回縮機制之失效。 【發明內容】 本發明的主要目的在於提供一種注射針回縮傾倒結構， • 尤其是可以將注射針回縮容置在該注射針筒的內腔之同時， n歷注射針之屋t尖最置，以達到更安全的針刺意外防範之 功效者。 Φ 本發明的另一目的在於提供一種注射針回縮傾倒結構， 尤其是可以適用於任何式樣之活塞，無論活塞彈性體是否涵 蓋至活塞之前端面，推桿前端與注射針座皆具有卡扣機能， 藉以確保注射針被收置至該注射針筒的內腔之回縮功能。 根據本發明的目的與功效，其主要在一注射針筒之外筒 內部所配設之一注射針座製設有卡槽、窗孔及帶有凸脚之彈 性臂，而插置在該外筒內的推桿前端設有卡扣環部。當該推 • 桿前端進入該注射針座之筒腔部，則該推桿上裝置活塞的環 形肋之端面推迫該該彈性臂之凸脚，使該彈性臂向該窗孔的 中心方向彎曲，且該卡扣環部與該卡槽嵌合。當拉回該推桿 ! 時，則該注射針座及座上的注射針會一同回縮進入該外筒內 腔，藉由該彈性臂自我的回彈力使該凸脚推抵環形肋之端面 ，而使該注射針座形成傾斜。 以下即再依本發明所描述的結構組態，舉出較佳實施例 1290476 ’並配合圖式詳細說明。 【實施方式】 、 請參閱第一、二圖所示，圖中揭露一注射針筒包括一外 ' 筒10、一推桿20、一注射針座30。又一注射針40組設在該 注射針座30的一端，而一針蓋50用以套在該注射針40外。 上述外筒10係一中空管柱，其內腔接近前端位置12形成 * 一多階直徑之腔體構造，而內腔的後端位置14設有一筒翼16 〇 該注射針座30係組設在該外筒1 〇的前端位置12，並且 利用該前端位置12之多階直徑構造的限制而不脫出。該推桿 20係於一端設有一環形肋22，該環形肋22外配設有活塞，且 該乡肋22插置在該外筒10內部。推動該推桿20則該環形 肋22靠向該注射針座30。 * 更進一進說明，該推桿20的環形肋22前端更形成一柱部 :2^在該柱部24的前端’其外圍設有一卡扣環部62 ’以及其 端部設有一嵌合凸部64。 該注射針座30係包括用以與該注射針40結合的凸出小管 32，及與該凸出小管32連結且爲中空構造之一筒腔部34。該 凸出小管32、該筒腔部34與該注射針40係連通。 請參閱第三至五圖所示，其中，該圖爲本案之實施例 1290476 ，揭露在該注射針座30之凸出小管32底部形成一嵌合孔36 ;在該,筒腔部34的內壁面開設有一卡槽66;以及在該筒腔部 34的壁體上開設有一貫穿的窗孔68。又二彈性臂72相對地形 成在該窗孔68 —端，二該彈性臂72之間具有一間距74，且 各彈性臂72的自由端形成有凸脚76，該彈性臂72係利用該 窗孔68與該筒腔部34底緣間的部份體積而構成，而且該凸腳 76的底緣比該筒腔部34凸出該筒腔部34的底緣。 請參閱第四、五圖所示，於注射接近完成時，該推桿20 更加推入該外筒10內部，則該柱部24會進入該筒腔部34， 此時該嵌合凸部64與該嵌合孔36嵌合，而該環形肋22之前 端迫該彈性臂72向該窗孔68中心方向彎曲。又該卡扣環 ^---- 邰62卡入該卡槽66(如第五圖所示）內。 接著將該推桿20向外回拉時，由於卡扣環部62與該卡槽 66之卡扣作用，使推桿20可以拉動該注射針座30回縮進入 g射筒之內腔18。値得注意的是，當注射針座30回縮至是該 外筒10的中段位置18時，因中段位置18的內腔直徑較大， 而使注射針座30得以獲得傾斜的容納空間。另如第六圖所示 ，由前述內容已知該彈性臂72於注射操作接近完成時，即因 該注射針座30之凸脚76被推桿20的環形肋22推迫，而使該 彈性臂72彎曲，所以當推桿20拉動該注射針座30回縮進入 注射筒之內腔18時，由於推桿20之卡扣環部62與該卡槽66 1290476 之卡扣形成單邊之支點，以及該彈性臂72之自身之回彈形成 另邊之軸向推力，在上述二種條件下如第六圖所示’該注射 針座30得以利用中段位置18之空間而傾斜。 請參閱第七、八圖所示，係另一種注射針筒結構，大體 上包括有一外筒70、一推桿80，以及一注射針座90。該外筒 7◦的結構與前一實施例結構相當，而該推桿8Ό的環形肋82 前端設有柱部84，又該柱部84的端部設有卡扣環部1〇〇與一 ® 嵌合凸部110。該推桿80插置在該外筒70內部，而該注射針 座90與一注射針40的組合體組設在該外筒70 —端。 請參閱第九圖所示，該注射針座90—端設有一凸出小管 92，另一端形成一筒腔部94。其中該凸出小管92的根部設有 一嵌合孔120 ;而該筒腔部94，在其內壁面設有一卡槽130， 而在筒腔部94之壁體上開設有一窗孔140，一彈性臂150係 利用該窗孔140與該筒腔部94底緣間的部份體積而構成，而 § I 且該彈性臂150的自由端形成一凸腳160，該凸腳160的底緣 比該同腔部94的底緣凸出。 請參閱第十圖所示，係另一注射針座90結構，其與第九 圖所不結構相當，差異處在於該窗孔140的一端設有相對的二 個帶有凸脚180之彈性臂170，而凸脚180分別形成在該彈性 臂170的自由端。 請參閱第十一圖及第十二圖所示，當注射時，推桿20的 1290476 前端被推入該注射針座90的筒腔部94,該嵌合凸部110與該 嵌合孔120嵌合，該卡扣環部1〇〇則卡在該卡槽130內，同時 該環形肋82推迫該凸脚160，使該彈性臂150朝該窗孔140 內方向彎曲 - 接著，請參閱第十三圖所示，將該推桿80向外回拉時， 由於卡扣環部82與該卡槽130之卡扣作用，使推桿80可以拉 動該注射針座90屈縮進入注射筒70之內腔。値得注意的是， • 當注射針座90回縮至是該注射筒70之內腔時，因此內腔直徑 較大，而使注射針座90得以獲得傾斜的容納空間；另如前述 內容已知，該彈性臂150於注射操作接近完成時，即因該凸脚 160被推桿80的環形肋82推迫，而使該彈性臂150彎曲，所 以當推桿80拉動該注射針座90回縮進入注射筒70之內腔時 ，由於推桿80之卡扣環部82與該卡槽130之卡扣形成單邊之 支點，以及該彈性臂150之自身之回彈形成另邊之軸向推力， • 在上述二種條件下如第十三圖所示，該注射針座90得以利用 注射筒70之內腔空間而傾斜。 • 由各實施例的說明可知，本發明的注射針座開設有一 窗孔，以及設至少一帶有凸脚的彈性臂，利用該彈性臂所產 雙WIT-一-丄-------- 生的彈性回復力以及凸脚的推抵作用，以及使該注射針座在 進入該外筒的中段位置後產生傾斜。如此即可使連接在該注 射針座的注射針產生針尖偏置之效果，達到更佳的安全防護 1290476 功能。此外，由於該彈性臂可以自行變形’因此不管各式推 桿所設活塞之軟性體是否涵蓋到環形肋之前端面’該推桿均 能以與連結座卡扣勾接，並於當該推桿拉引連結座入外筒內 腔時，利用彈性臂之回彈作用與推桿所設之環形肋形成推移 ，而迫使連結座與注射針在注射針筒之腔內呈現傾斜狀態， 則使注射針之針尖將被偏置於接近外筒內壁，防止推桿回縮 後意外地再被向前推送，而使針尖暴露在外面之針刺危險。 • 以上乃本發明之較佳實施例以及設計圖式，惟較佳實施 例以及設計圖式僅是舉例說明，並非用於限制本發明技藝之 權利範圍，凡以均等之技藝手段、或爲下述「申請專利範圍 」內容所涵蓋之權利範圍而實施者，均不脫離發明作之範疇 而爲申請人之權利範圍。 1290476 【圖式簡單說明】 [圖7K說明卜 |:Λ ij: 第一圖係本發明其一實施¢1之分解圖 圖 !丨丨: 窠二圖係本發明其一實施例組合結構示意 第三a圖係本發明其一注ifif座之彈性臂實施例之外觀圖。 第三b圖係本發明其一注ίι1針座另一種彈性臂實施例外觀圖 丨娜： 第四圖係本發明其一實施偷之使用狀態剖面示意圖。 第五圖係本發明其一實施例之使用狀態剖面結構示意圖。 第六圖係本發明其一實施例之注射針收置在外筒內之結構示 意圖 第七圖係本發明另一實施例之分解圖。 第八圖係本發明另一實施例之組合結構示意圖。 第九圖係本發明另一注射針座外觀圖。 第十圖係本發明又一注射針座外觀圖。 g第十一圖係本發明另一實施例之使用狀態剖面示意圖。 第十二圖係本發明另一實施例之使用狀態剖面示意圖。 第十三圖係本發明另一實施例之注射針收置在外筒內之結構 示意圖。 .I..I. The piston elastomer is only in contact with the outer surface of the syringe barrel, and the front end surface of the piston is exposed with an injection molded rigid plastic material. Thus, in the technique proposed in the case, the height is If the upper locking portion is firstly resisted on the injection molded rigid plastic material, the combined body and the cavity portion cannot be further combined at all, so that the push rod cannot be combined with the needle set hook 1290476 to make the needle The group retracts to the inner cavity of the outer cylinder, constituting the failure of the retraction mechanism. SUMMARY OF THE INVENTION The main object of the present invention is to provide a needle retracting structure, and in particular, the needle can be retracted into the inner cavity of the syringe, and the needle tip of the needle is the most Set to achieve a safer acupuncture accident prevention effect. Φ Another object of the present invention is to provide an injection needle retracting structure, in particular, it can be applied to any type of piston, whether the piston elastic body covers the front end surface of the piston, the push rod front end and the injection needle holder have a buckle function. , to ensure that the injection needle is retracted to the retraction function of the inner cavity of the injection syringe. According to the object and effect of the present invention, one of the injection needle holders disposed inside the outer cylinder of the injection syringe is provided with a card slot, a window hole and an elastic arm with a convex foot, and is inserted outside the needle holder. The front end of the push rod in the cylinder is provided with a snap ring portion. When the front end of the push rod enters the barrel portion of the injection needle seat, the end surface of the annular rib of the device piston on the push rod urges the convex leg of the elastic arm to bend the elastic arm toward the center of the window hole And the snap ring portion is fitted into the card slot. When the pusher is pulled back, the injection needle seat and the injection needle on the seat are retracted into the inner cavity of the outer cylinder, and the elastic arm elastically urges the convex foot against the end surface of the annular rib. And the injection needle seat is inclined. In the following, the structural configuration described in accordance with the present invention will be described in detail with reference to the preferred embodiment 1290476'. [Embodiment] Please refer to the first and second figures. The injection syringe includes an outer cylinder 10, a push rod 20 and an injection needle holder 30. A further set of injection needles 40 is provided at one end of the injection needle holder 30, and a needle cover 50 is intended to fit over the injection needle 40. The outer cylinder 10 is a hollow tubular string, the inner cavity is formed near the front end position 12 to form a multi-step diameter cavity structure, and the rear end position 14 of the inner cavity is provided with a tubular wing 16 〇 the injection needle seat 30 series It is provided at the front end position 12 of the outer cylinder 1 , and is restrained by the restriction of the multi-stage diameter configuration of the front end position 12. The push rod 20 is provided with an annular rib 22 at one end, and a piston is disposed outside the annular rib 22, and the rib 22 is inserted inside the outer cylinder 10. Pushing the push rod 20 causes the annular rib 22 to abut the injection needle hub 30. * Further, the front end of the annular rib 22 of the push rod 20 is further formed with a column portion: 2) at the front end of the column portion 24, a snap ring portion 62' is provided at the periphery thereof, and a fitting portion is provided at the end portion thereof. Department 64. The needle hub 30 includes a projecting small tube 32 for engaging with the injection needle 40, and a cylindrical portion 34 which is coupled to the protruding small tube 32 and has a hollow configuration. The protruding small tube 32 and the cylindrical portion 34 are in communication with the injection needle 40. Please refer to the third to fifth figures, wherein the figure is the embodiment 1290476 of the present invention, and a fitting hole 36 is formed at the bottom of the protruding small tube 32 of the injection needle holder 30; A card slot 66 is defined in the wall surface; and a through hole 68 is formed in the wall of the cavity portion 34. The two elastic arms 72 are oppositely formed at the end of the window hole 68, and the elastic arms 72 have a spacing 74 therebetween. The free ends of the elastic arms 72 are formed with protrusions 76. The elastic arms 72 utilize the window. A portion of the volume between the hole 68 and the bottom edge of the barrel portion 34 is formed, and the bottom edge of the protrusion 76 protrudes from the bottom portion of the barrel portion 34 than the barrel portion 34. Referring to the fourth and fifth figures, when the injection is nearly completed, the push rod 20 is further pushed into the outer cylinder 10, and the column portion 24 enters the cylindrical portion 34, and the fitting convex portion 64 is at this time. The fitting hole 36 is fitted, and the front end of the annular rib 22 urges the elastic arm 72 to bend toward the center of the window hole 68. The snap ring ^---- 邰 62 is snapped into the card slot 66 (shown in Figure 5). When the push rod 20 is pulled back outward, the push rod 20 can pull the needle holder 30 to retract into the inner cavity 18 of the g barrel due to the snap action of the snap ring portion 62 and the card slot 66. It is to be noted that when the needle hub 30 is retracted to the mid-position 18 of the outer cylinder 10, the needle hub 30 is allowed to obtain a slanted accommodation space due to the larger diameter of the lumen portion of the middle portion 18. As shown in the sixth figure, it is known from the foregoing that the elastic arm 72 is close to completion when the injection operation is completed, that is, because the projection 76 of the injection needle holder 30 is urged by the annular rib 22 of the push rod 20, the elasticity is made. The arm 72 is bent, so that when the push rod 20 pulls the needle hub 30 back into the inner cavity 18 of the syringe, the snap ring portion 62 of the push rod 20 and the buckle of the card slot 66 1290476 form a unilateral fulcrum. And the rebound of the elastic arm 72 itself forms the axial thrust of the other side. Under the above two conditions, as shown in the sixth figure, the injection needle holder 30 can be tilted by utilizing the space of the middle position 18. Referring to Figures 7 and 8, there is another syringe structure which generally includes an outer cylinder 70, a push rod 80, and an injection needle holder 90. The structure of the outer tube 7 is equivalent to that of the previous embodiment, and the front end of the annular rib 82 of the push rod 8 is provided with a column portion 84, and the end portion of the column portion 84 is provided with a snap ring portion 1 and a ® fitting projection 110. The push rod 80 is inserted inside the outer cylinder 70, and a combination of the injection needle 90 and an injection needle 40 is assembled at the end of the outer cylinder 70. Referring to the ninth figure, the injection needle hub 90 has a protruding small tube 92 at its end and a cylindrical portion 94 at the other end. The root portion of the protruding tube 92 is provided with a fitting hole 120. The cylindrical portion 94 is provided with a slot 130 on the inner wall surface thereof, and a window hole 140 is defined in the wall portion of the barrel portion 94. The arm 150 is formed by a partial volume between the window hole 140 and the bottom edge of the cavity portion 94, and the free end of the elastic arm 150 forms a protrusion 160, and the bottom edge of the protrusion 160 is The bottom edge of the same cavity portion 94 is convex. Please refer to the tenth figure, which is another injection needle holder 90 structure, which is equivalent to the structure of the ninth figure. The difference is that one end of the window hole 140 is provided with two opposite elastic arms with the convex legs 180. 170, and the protrusions 180 are respectively formed at the free ends of the elastic arms 170. Referring to FIG. 11 and FIG. 12, when the injection is performed, the front end of the 1290476 of the push rod 20 is pushed into the cylindrical portion 94 of the injection needle holder 90, and the fitting convex portion 110 and the fitting hole 120 are inserted into the fitting hole 120. In the fitting, the snap ring portion 1 is caught in the slot 130, and the annular rib 82 pushes the protrusion 160 to bend the elastic arm 150 toward the inside of the window 140 - then, see As shown in the thirteenth figure, when the push rod 80 is pulled back outward, the push rod 80 can pull the injection needle holder 90 into the syringe due to the snap action of the snap ring portion 82 and the card slot 130. The inner cavity of 70. It should be noted that: • When the needle hub 90 is retracted to the inner cavity of the syringe 70, the diameter of the lumen is large, so that the needle hub 90 can obtain an inclined accommodation space; It is known that the elastic arm 150 bends the elastic arm 150 when the injection operation is nearly completed, that is, because the protrusion 160 is urged by the annular rib 82 of the push rod 80, so when the push rod 80 pulls the injection needle holder 90 back When retracting into the inner cavity of the syringe 70, the snap ring portion 82 of the push rod 80 and the snap groove of the card slot 130 form a fulcrum of a single side, and the rebound of the elastic arm 150 itself forms an axial direction of the other side. Thrust, • Under the above two conditions, as shown in Fig. 13, the needle hub 90 can be tilted by utilizing the lumen space of the syringe 70. It can be seen from the description of the embodiments that the injection needle holder of the present invention has a window hole and at least one elastic arm with a convex foot, and the double WIT-一-丄------- is produced by the elastic arm. - the elastic restoring force of the raw body and the pushing action of the convex foot, and the tilting of the injection needle seat after entering the middle position of the outer cylinder. This allows the needle attached to the injection needle holder to produce a tip offset for better safety protection 1290476 function. In addition, since the elastic arm can be deformed by itself, therefore, regardless of whether the soft body of the piston provided by each type of push rod covers the front end surface of the annular rib, the push rod can be hooked with the joint seat, and when the push rod is used When the pulling joint is inserted into the inner cavity of the outer cylinder, the rebounding action of the elastic arm and the annular rib provided by the push rod are formed, and the connecting seat and the injection needle are forced to tilt in the cavity of the injection needle, so that the injection is made The needle tip of the needle will be biased close to the inner wall of the outer cylinder to prevent the push rod from being pushed forward again after being retracted, and the needle tip is exposed to the outside. The above is a preferred embodiment and a design of the present invention, but the preferred embodiments and the design drawings are merely illustrative and are not intended to limit the scope of the present invention. The scope of the rights covered by the contents of the "Scope of Application for Patent Application" is the scope of the applicant's rights without departing from the scope of the invention. 1290476 [Simplified illustration of the drawings] [Fig. 7K illustrates the use of the first embodiment of the present invention. FIG. 7K illustrates an exploded view of an embodiment of the present invention. The three-a diagram is an external view of an embodiment of the elastic arm of the present invention. The third b-picture is a schematic view of another embodiment of the elastic arm of the present invention. The fourth figure is a schematic cross-sectional view of the state of the present invention. Fig. 5 is a schematic cross-sectional view showing the state of use of an embodiment of the present invention. Figure 6 is a schematic view showing the structure of an injection needle housed in an outer cylinder according to an embodiment of the present invention. The seventh drawing is an exploded view of another embodiment of the present invention. The eighth figure is a schematic view of a combined structure of another embodiment of the present invention. The ninth drawing is an external view of another injection needle holder of the present invention. The tenth figure is an external view of another injection needle holder of the present invention. An eleventh drawing is a schematic cross-sectional view showing a state of use of another embodiment of the present invention. Figure 12 is a schematic cross-sectional view showing the state of use of another embodiment of the present invention. Figure 13 is a schematic view showing the structure of an injection needle housed in an outer cylinder according to another embodiment of the present invention. .I..
[圖號說明] 10外筒 12前端位置[Illustration number] 10 outer tube 12 front end position
13 1290476 14後端位置 16筒翼 18中段位置 20推桿 • 22環形肋 24柱部 30注射針座 籲32凸出小管 34筒腔部 36嵌合孔 40注射針 50針蓋 62卡扣環部 64嵌合凸部 • 66卡槽 68窗孔 70外筒 72彈性臂 74間距 76凸脚 78中段位置 1290476 8 0推桿 82環形肋 84柱部 90注射針座 . 92凸出小管 94筒腔部 100卡扣環部 φ 110嵌合凸部 120嵌合孔 13◦卡槽 140窗孔 150彈性臂 160凸脚 170彈性臂 • 180凸脚13 1290476 14 rear end position 16 tube wing 18 middle position 20 push rod • 22 annular rib 24 column part 30 injection needle seat 32 protruding small tube 34 barrel portion 36 fitting hole 40 injection needle 50 needle cover 62 buckle ring 64 fitting protrusions 66 card slot 68 window hole 70 outer cylinder 72 elastic arm 74 spacing 76 convex foot 78 middle position 1290476 8 0 push rod 82 annular rib 84 column 90 injection needle seat. 92 protruding small tube 94 barrel portion 100 snap ring portion φ 110 fitting convex portion 120 fitting hole 13 ◦ card slot 140 window hole 150 elastic arm 160 convex foot 170 elastic arm • 180 convex foot