JP3720894B2

JP3720894B2 - Ejector

Info

Publication number: JP3720894B2
Application number: JP35182095A
Authority: JP
Inventors: 仁天野; 昭彦三浦; 貴宇田川
Original assignee: Mitani Valve Co Ltd
Current assignee: Mitani Valve Co Ltd
Priority date: 1995-12-27
Filing date: 1995-12-27
Publication date: 2005-11-30
Anticipated expiration: 2015-12-27
Also published as: JPH09173920A

Description

【０００１】
【発明の属する技術分野】
この発明は、液体・乳液等の内容物をノズルから小出しに吐出する、化粧用・薬用・塗装用等の噴出器に関する。
【０００２】
【従来の技術】
従来、この種の噴出器の中には、図８に示すごとく構成したものがある。すなわち、押下釦１を押し下げ、噴出管２を押し込んでシリンダ室３内の圧を高め、ピストン弁４をスライドして噴出管２の連通孔２ａを開き、その連通孔２ａを通して該噴出管２内をシリンダ室３内と連通し、そのシリンダ室３内の内容物を噴出管２内を通してノズル１ａから吐出する一方、噴出管２の押し込みを解除したとき、付勢力に基づき噴出管２を押し上げ、ピストン弁４をスライドして噴出管２の連通孔２ａを塞ぎ、シリンダ室３内を負圧化して器容器５内の内容物を吸い上げていた。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来のそのような噴出器では、ピストン弁４と噴出管２間の摩擦力よりピストン弁４とシリンダ室３内面間の摩擦力を強くしているので、前記噴出管２の押し込みを解除して該噴出管２を付勢力で押し上げるとき、前記ピストン弁４が直ちにスライドして噴出管２の連通孔２ａを塞ぎ、内容物がノズル１ａ付近に残る。その結果、ノズル１ａ付近に残った内容物が経時において徐々に流れ出し、ノズル１ａ先端から垂れ落ちて器本体５やそのまわりを汚す問題があった。
【０００４】
そこで、この発明の目的は、噴出器の使用後、ノズル付近に残った内容物がノズル先端から垂れ落ちることを防止することにある。
【０００５】
【課題を解決するための手段】
そのため、請求項１に記載の発明は、以下の図示実施の形態に示すとおり、
シリンダ１２内に噴出管１８を入れてその噴出管１８を押し込んでシリンダ室３０内の圧を高め、前記シリンダ１２と前記噴出管１８との間に設けるピストン弁１７を前記シリンダ１２に摺接しスライドして前記噴出管１８の連通孔２０ｃを開き、その連通孔２０ｃを通して該噴出管１８内を前記シリンダ室３０内と連通し、そのシリンダ室３０内の内容物を前記噴出管１８内を通してノズル３１ｂから吐出する一方、
前記噴出管１８の押し込みを解除したとき、付勢力に基づき前記噴出管１８を押し上げ、前記ピストン弁１７をスライドして前記噴出管１８の連通孔２０ｃを塞ぎ、前記シリンダ室３０内を負圧化して器容器１０内の内容物を吸い上げる噴出器において、
前記噴出管１８内にボール弁２１を設け、前記噴出管１８を押し込んで該噴出管１８内を前記シリンダ室３０内と連通したとき開き、押し込みを解除して前記噴出管１８を押し上げたとき閉じるとともに、
前記ピストン弁１７を前記噴出管１８に対する押当力より弱い押当力で前記シリンダ１２に押し当て、前記噴出管１８を押し上げるとき前記ピストン弁１７も共に上動する一方、
前記ボール弁２１を閉じて後、その上動したピストン弁２１を突き当ててスライドし、前記連通孔２０ｃを塞ぐ突き当て部２８ｅを形成してなる、ことを特徴とする。
【０００６】
請求項２に記載の発明は、以下の図示実施の形態に示すとおり、
シリンダ１２内に噴出管１８を入れてその噴出管１８を押し込んでシリンダ室３０内の圧を高め、前記シリンダ１２と前記噴出管１８との間に設けるピストン弁１７を前記シリンダ１２に摺接しスライドして前記噴出管１８の連通孔２０ｃを開き、その連通孔２０ｃを通して該噴出管１８内を前記シリンダ室３０内と連通し、そのシリンダ室３０内の内容物を前記噴出管１８内を通してノズル３１ｂから吐出する一方、
前記噴出管１８の押し込みを解除したとき、付勢力に基づき前記噴出管１８を押し上げ、前記ピストン弁１７をスライドして前記噴出管１８の連通孔２０ｃを塞ぎ、前記シリンダ室３０内を負圧化して器容器１０内の内容物を吸い上げる噴出器において、
前記噴出管１８内にボール弁２１を設け、前記噴出管１８を押し込んで該噴出管１８内を前記シリンダ室３０内と連通したとき開き、押し込みを解除して前記噴出管１８を押し上げたとき閉じるとともに、
前記噴出管１８を押し込んだとき係合し、該噴出管１８を押し上げたとき前記ピストン弁１７も共に上動する掛止部ａをピストン弁１７と噴出管１８間に設ける一方、
前記ボール弁２１を閉じて後、その上動したピストン弁１７を突き当てて前記掛止部ａでの係合を解除し、スライドして前記連通孔２０ｃを塞ぐ突き当て部２８ｅを形成してなる、ことを特徴とする。
【０００７】
そして、請求項１および請求項２に記載の発明によれば、噴出管１８を押し込んで噴出管１８内をシリンダ室３０内と連通したときボール弁２１を開き、シリンダ室３０内の内容物を噴出管１８内を通してノズル３１ｂから吐出する。
一方、噴出管１８の押し込みを解除して噴出管１８を付勢力で押し上げたとき、ピストン弁１７も共に上動し、噴出管１８内の内容物を連通孔２０ｃを通してシリンダ室３０内に吸い込み、同時に、ノズル３１ｂ付近の内容物をノズル３１ｂ奥へ引き込むとともに、シリンダ室３０内に器容器１０内の内容物を吸い上げる。しかして、ボール弁２１を閉じて後、上動したピストン弁１７を突き当て部２８ｅに突き当て、該ピストン弁１７をスライドして噴出管１８の連通孔２０ｃを塞ぐ。
【０００８】
【発明の実施の形態】
以下、図面を参照しつつ、この発明の実施の形態につき説明する。
図１は、請求項１に記載の発明による噴出器で、その不使用時における要部の縦断面図である。
【０００９】
図中符号１０は、器容器である。器容器１０は、プラスチック材料でボトル形状につくり、口部１０ａ外周におねじを設け、図示しないが内部にたとえば内容物であるシャンプー液を収納してなる。
【００１０】
その器容器１０の口部１０ａには、ポンプＰを取り付けてなる。ポンプＰには、ねじキャップ１１を備える。
【００１１】
ねじキャップ１１は、頂部１１ａを有するやや短い円筒形状で下向きに開口し、内周にめねじを設け、頂部１１ａ中央に中心孔１１ｂを設ける。そして、頂部１１ａ内面をシリンダ１２のフランジ１２ａに乗せ、器容器１０の口部１０ａのおねじにめねじを係合して取り付けてなる。
【００１２】
前記シリンダ１２は、途中に３つの段部１２ｂ・１２ｃ・１２ｄを設けて図中下方に向け順次小径としてなる。
【００１３】
そのシリンダ１２の上部は、第１の段部１２ｂ位置に径方向に貫通して横孔１２ｅを設け、ねじキャップ１１の中心孔１１ｂを通して上端部を外向きに突出してなる。
【００１４】
前記シリンダ１２の下部には、第３の段部１２ｄの内側に下方に向けて漸次小径となる弁座１２ｆを形成し、その下方に吸い込み通路１２ｇを続けて設ける一方、第３の段部１２ｄ位置から上向き筒部１２ｈを立ち上げ、該上向き筒部１２ｈの外面とシリンダ１２の内面との間に上向き開口の環状凹部１２ｊを形成する。また、上向き筒部１２ｈには、内面から内向きに突出して弾性規制片１２ｍを周方向に複数、上下方向に長く形成する。各弾性規制片１２ｍは、上端部を上方に向けて漸次内向きに傾斜してなる。
【００１５】
そして、シリンダ１２の下端部に吸上管１３の上端部を取り付け、その管内と吸い込み通路１２ｇ内とを連通してなる。
【００１６】
それから、シリンダ１２内に第１ボール弁１５を入れ、該第１ボール弁１５を各弾性規制片１２ｍの上端に載せてから弾性に抗して押し込み、各弾性規制片１２ｍを弾性変形して挿入して第１ボール弁１５を弁座１２ｆに載せてなる。また、シリンダ１２内にコイルバネ１６を入れてその下端を環状凹部１２ｊ内に入れ、さらに、シリンダ１２内にピストン弁１７を取り付けた噴出管１８を入れてコイルバネ１６に載せてなる。
【００１７】
しかして、前記噴出管１８の下部管２０は、内部中心に上端から下方途中まで管路２０ａを形成し、その管路２０ａの途中に弁座２０ｂを設け、管路２０ａの下方と連通して径方向に貫通する連通孔２０ｃを設けるとともに、下端部に拡径筒部２０ｄを設ける。そして、管路２０ａ内に第２ボール弁２１を入れて弁座２０ｂに載せ、ピストン弁１７を取り付けて後、上端部を噴出管１８の上部管２２の管路２２ａ内に圧入して下部管２０と上部管２２を連結し、管路２２ａ内と前記管路２０ａ内とを連通してなる。
【００１８】
その噴出管１８の上部管２２は、上下に貫通する管路２２ａの下端部に拡径孔部２２ｂを設けるとともに、管路２２ａの上部内面から内向きに突出して凸部２２ｃを周方向に複数、上下方向に設ける。
【００１９】
前記ピストン弁１７は、たとえばゴム材でつくり、外筒部２５と内筒部２６とを同心で一体に形成する。そして、内筒部２６の上端部を拡径孔部２２ｂ内に入れ、その拡径孔部２２ｂの内面に内筒部２６の上端を押し当てて噴出管１８に対して上下に摺動自在に設けるとともに、その内筒部２６の押当力より弱い押当力で外筒部２５の外面をシリンダ１２の内面に押し当ててシリンダ１２に対して上下摺動自在に設ける。
【００２０】
しかして、前記シリンダ１２の上端には、嵌合キャップ２８を設ける。その嵌合キャップ２８は、キャップ状の外形部２８ａの内部に中径筒部２８ｂと小径筒部２８ｃを同心で一体に形成し、それら中径筒部２８ｂと小径筒部２８ｃとの間に下向き開口の環状凹部２８ｄを設けるとともに、小径筒部２８ｃの上部内周にめねじを設け、下部に突き当て部２８ｅを設ける。
【００２１】
そして、前記小径筒部２８ｃ内に前記噴出管１８の上部管２２を通し、シリンダ１２内の上端部に該小径筒部２８ｃを入れるとともに、環状凹部２８ｄ内に前記シリンダ１２の上端部を圧入し、該シリンダ１２のフランジ１２ａ上でねじキャップ１１を中径筒部２８ｄで挟持する。このとき、突き当て部２８ｅを前記ピストン弁１７の外筒部２５の上端に突き当て、噴出管１８を介してコイルバネ１６を少し圧縮して設け、そのコイルバネ１６の付勢力で前記拡径筒部２０ｄの上端をピストン弁１７の内筒部２６の下端に押し当てて噴出管１８の連通孔２０ｃを塞いでなる。
【００２２】
一方、前記嵌合キャップ２８から外部に突出する前記噴出管１８の上端には、押下釦３１を取り付けてなる。その押下釦３１は、キャップ状の外形部３１ａの外周にノズル３１ｂを嘴状に設けるとともに、内部中央におねじ筒部３１ｃを設け、そのおねじ筒部３１ｃとノズル３１ｂ間を横長筒部３１ｄでつなぎ、おねじ筒部３１ｃの端部からノズル３１ｂ先端へ至る噴出通路３１ｅを内部に形成する。そして、おねじ筒部３１ｃ内に前記噴出管１８の上端部を圧入し、噴出通路３１ｅ内と前記管路２２ａ内とを連通してなる。
【００２３】
しかして、噴出器の使用時、押下釦３１をコイルバネ１６に抗して図１中矢印Ａ方向に押し下げ、噴出管１８をシリンダ室３０内に押し込むと、シリンダ室３０内の圧が高まり、ピストン弁１７を噴出管１８に対し上方へスライドして連通孔２０ｃを開き、その連通孔２０ｃを通して管路２０ａ内をシリンダ室３０内と連通する。そして、シリンダ室３０内のシャンプー液を連通孔２０ｃを通して管路２０ａ内に送り出し、その液圧で第２ボール弁２１を押し上げて管路２２ａ内に送り出し、噴出通路３１ｅを通してノズル３１ｂ先端から外部へと吐出する。
【００２４】
その後、図２に示す押し下げ最終段階で、押下釦３１から手を離して噴出管１８の押し込みを解除すると、コイルバネ１６の付勢力で噴出管１８を図中矢印Ｂ方向へ押し上げる。そのとき、ピストン弁１７をシリンダ１２内面よりも噴出管１８に強く押し当てているので、ピストン弁１７と噴出管１８の間の摩擦力で該ピストン弁１７を噴出管１８と共に上動してシリンダ室３０内を負圧化する。そして、図３に示すように、上下の管路２０ａ・２２ａ内のシャンプー液の一部を連通孔２０ｃを通してシリンダ室３０内に吸い込み、同時に、ノズル３１ｂ付近のシャンプー液を奥側へと引き込むとともに、第１ボール弁１５を開いて器容器１０内のシャンプー液を吸い上げ通路１２ｇからシリンダ室３０内に吸い上げる。やがて、図４に示すように、再び第２ボール弁２１を閉じて後、さらに噴出管１８が上動すると、器容器１０内のシャンプー液をシリンダ室３０内に吸い上げる。その後、上動したピストン弁１７の外筒部２５の上端を突き当て部２８ｅに突き当て、ピストン弁１７と噴出管１８間の摩擦力に抗してさらに該噴出管１８だけを少し押し上げ、ピストン弁１７をスライドする。そして、ピストン弁１７の内筒部２６の下端に拡径筒部２０ｄの上端を押し当てて連通孔２０ｃを塞ぎ、最終段階で図１の状態に復帰する。
【００２５】
なお、上述した図示噴出器では、運搬時の小型化を図るべく、運搬時は前記コイルバネ１６に抗して押下釦３１を図１中矢印Ａ方向に最後まで押し下げて噴出管１８を図２に示すようにシリンダ室３０内に押し込み後、押下釦３１を回転しておねじ筒部３１ｃを前記小径筒部２８ｃ内のめねじにねじ付け、図５に示すように噴出管１８の動きをロックしてなる。
【００２６】
ところで、請求項２に記載の発明による噴出器では、噴出管１８を押し込んだとき係合し、該噴出管１８を押し上げたときピストン１７も共に上動する掛止部ａを設ける。すなわち、図６に示すように、ピストン弁１７の内筒部２６の内面から内向きに突出して凸部２６ａを形成し、噴出管１８の下部管２０の中間部外周に段部２０ｅを形成し、それら凸部２６ａと段部２０ｅとで掛止部ａを形成してなる。
【００２７】
しかして、噴出器の使用時、押下釦３１を押し下げて噴出管１８をシリンダ室３０内に押し込むと、シリンダ室３０内の圧が高まり、図７に示すように、ピストン弁１７を噴出管１８に対し上方へスライドして連通孔２０ｃを開くとともに凸部２６ａと段部２０ｅとを係合し、上述した図１乃至図５に示す噴出器と同様に、シリンダ室３０内の内容物をノズル３１ｂ先端から外部へと吐出する。
【００２８】
一方、噴出管１８の押し込みを解除しコイルバネ１６の付勢力で該噴出管１８を押し上げるとき、掛止部ａでの係合によりピストン弁１７も噴出管１８と共に上動する。そして、上述した図１乃至図５に示す噴出器と同様に、第２ボール弁２１が再び弁座２０ｂに載るまでの間、上下の管路２０ａ・２２ａ内のシャンプー液の一部を連通孔２０ｃを通してシリンダ室３０内に吸い込み、同時に、ノズル３１ｂ付近のシャンプー液を奥側へと引き込むとともに、器容器１０内のシャンプー液をシリンダ室３０内に吸い上げる。それから、上動したピストン弁１７の外筒部２５の上端を突き当て部２８ｅに突き当て、噴出管１８だけをさらに少し押し上げて掛止部ａでの係合を解除し、ピストン弁１７をスライドして連通孔２０ｃを塞ぎ、最終段階で図６の状態に復帰する。
【００２９】
なお、図６および図７に示す実施の形態では、掛止部ａは、ピストン弁１７側の凸部２６ａと噴出管１８側の段部２０ｅとで形成した。しかし、これに限るものでなく、掛止部は、図示しないがピストン弁１７側の段部と噴出管１８側の凸部とで形成する構成としてもよいし、ピストン弁１７側の凸部と噴出管１８側の凸部とで形成する構成としてもよい。
【００３０】
【発明の効果】
以上のことから、請求項１および請求項２に記載の発明によれば、噴出管の押し込みを解除し付勢力で噴出管を押し上げるときピストン弁も共に上動する一方、ボール弁を閉じて後、その上動したピストン弁を突き当て部に突き当ててスライドして噴出管の連通孔を塞ぐので、ボール弁を閉じるまで、噴出管内に残った内容物の一部をシリンダ室内に吸い込み、同時にノズル付近の内容物をそのノズル奥へと引き込み、使用後にノズル先端から内容物が垂れ落ちることを防止することができ、従来のように垂れた内容物で容器やそのまわりを汚すことを防止することができる。
【図面の簡単な説明】
【図１】請求項１に記載の発明によるシャンプー用の噴出器で、その不使用時における要部の縦断面図である。
【図２】その使用時、押下釦の押し下げ最終段階における噴出器の要部の縦断面図である。
【図３】その押し下げた押下釦から手を離して後、噴出管の押し上げ途中で、シリンダ室内に噴出管内の内容物および器容器内の内容物を吸い込む状態を示す噴出器の要部の縦断面図である。
【図４】その噴出管の押し上げ途中で、第２ボール弁を再び弁座に載せた状態における噴出器の要部の縦断面図である。
【図５】前記噴出器の運搬時、噴出管を押し込みロックした状態における要部の縦断面図である。
【図６】請求項２に記載の発明によるシャンプー用の噴出器で、その不使用時における要部の縦断面図である。
【図７】その使用時、押下釦の押し下げ最終段階における噴出器の要部の縦断面図である。
【図８】従来の噴出器で、不使用時における要部の縦断面図である。
【符号の説明】
１０器容器
１７ピストン弁
１８噴出管
２０ｃ連通孔
２１ボール弁
２８ｅ突き当て部
３０シリンダ室
３１ｂノズル
ａ掛止部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ejector for cosmetics, medicinal use, painting, etc., which discharges contents such as liquid and milky lotion from a nozzle.
[0002]
[Prior art]
Conventionally, some of this type of ejector is configured as shown in FIG. That is, the push-down button 1 is depressed, the ejection pipe 2 is pushed in to increase the pressure in the cylinder chamber 3, the piston valve 4 is slid to open the communication hole 2a of the ejection pipe 2, and the inside of the ejection pipe 2 is passed through the communication hole 2a. Is communicated with the inside of the cylinder chamber 3, and the contents in the cylinder chamber 3 are discharged from the nozzle 1 a through the inside of the ejection pipe 2, while when the pushing of the ejection pipe 2 is released, the ejection pipe 2 is pushed up based on the urging force, The piston valve 4 was slid to close the communication hole 2 a of the ejection pipe 2, and the inside of the cylinder chamber 3 was made negative to suck up the contents in the vessel 5.
[0003]
[Problems to be solved by the invention]
However, in such a conventional ejector, since the frictional force between the piston valve 4 and the inner surface of the cylinder chamber 3 is made stronger than the frictional force between the piston valve 4 and the ejection pipe 2, the pushing of the ejection pipe 2 is released. When the ejection pipe 2 is pushed up by the urging force, the piston valve 4 immediately slides to close the communication hole 2a of the ejection pipe 2 and the contents remain in the vicinity of the nozzle 1a. As a result, there was a problem that the contents remaining in the vicinity of the nozzle 1a gradually flowed out over time, and dropped from the tip of the nozzle 1a and soiled the container body 5 and its surroundings.
[0004]
Accordingly, an object of the present invention is to prevent the contents remaining in the vicinity of the nozzle from dripping from the nozzle tip after use of the ejector.
[0005]
[Means for Solving the Problems]
Therefore, the invention described in claim 1 is, as shown in the following illustrated embodiment,
The injection pipe 18 is inserted into the cylinder 12 and the injection pipe 18 is pushed in to increase the pressure in the cylinder chamber 30, and the piston valve 17 provided between the cylinder 12 and the injection pipe 18 slides on the cylinder 12 and slides. Then, the communication hole 20c of the ejection pipe 18 is opened, the inside of the ejection pipe 18 is communicated with the inside of the cylinder chamber 30 through the communication hole 20c, and the contents in the cylinder chamber 30 are passed through the inside of the ejection pipe 18 to the nozzle 31b. While discharging from
When the ejection of the ejection pipe 18 is released, the ejection pipe 18 is pushed up based on the urging force, the piston valve 17 is slid to close the communication hole 20c of the ejection pipe 18, and the inside of the cylinder chamber 30 is made negative pressure. In the ejector that sucks up the contents in the container 10,
A ball valve 21 is provided in the ejection pipe 18 and is opened when the ejection pipe 18 is pushed in to communicate with the cylinder chamber 30 and closed when the ejection is released and the ejection pipe 18 is pushed up. With
While the piston valve 17 is pressed against the cylinder 12 with a pressing force weaker than the pressing force against the ejection pipe 18, when the ejection pipe 18 is pushed up, the piston valve 17 moves up together,
After the ball valve 21 is closed, the piston valve 21 moved upward is abutted and slid to form an abutting portion 28e that closes the communication hole 20c.
[0006]
The invention according to claim 2 is as shown in the following illustrated embodiment.
The injection pipe 18 is inserted into the cylinder 12 and the injection pipe 18 is pushed in to increase the pressure in the cylinder chamber 30, and the piston valve 17 provided between the cylinder 12 and the injection pipe 18 slides on the cylinder 12 and slides. Then, the communication hole 20c of the ejection pipe 18 is opened, the inside of the ejection pipe 18 is communicated with the inside of the cylinder chamber 30 through the communication hole 20c, and the contents in the cylinder chamber 30 are passed through the inside of the ejection pipe 18 to the nozzle 31b. While discharging from
When the ejection of the ejection pipe 18 is released, the ejection pipe 18 is pushed up based on the urging force, the piston valve 17 is slid to close the communication hole 20c of the ejection pipe 18, and the inside of the cylinder chamber 30 is made negative pressure. In the ejector that sucks up the contents in the container 10,
A ball valve 21 is provided in the ejection pipe 18 and is opened when the ejection pipe 18 is pushed in to communicate with the cylinder chamber 30 and closed when the ejection is released and the ejection pipe 18 is pushed up. With
While providing the latching part a between the piston valve 17 and the ejection pipe 18 that engages when the ejection pipe 18 is pushed in and moves up the piston valve 17 when the ejection pipe 18 is pushed up,
After the ball valve 21 is closed, the piston valve 17 moved upward is abutted to release the engagement at the latching portion a, and an abutting portion 28e that slides to close the communication hole 20c is formed. It is characterized by.
[0007]
According to the first and second aspects of the present invention, when the ejection pipe 18 is pushed in and the inside of the ejection pipe 18 communicates with the inside of the cylinder chamber 30, the ball valve 21 is opened, and the contents in the cylinder chamber 30 are removed. It discharges from the nozzle 31b through the inside of the ejection pipe 18.
On the other hand, when the ejection of the ejection pipe 18 is released and the ejection pipe 18 is pushed up by the urging force, the piston valve 17 also moves up, and the contents in the ejection pipe 18 are sucked into the cylinder chamber 30 through the communication hole 20c. At the same time, the contents in the vicinity of the nozzle 31 b are drawn into the nozzle 31 b and the contents in the container 10 are sucked up into the cylinder chamber 30. Thus, after closing the ball valve 21, the piston valve 17 that has moved upward is abutted against the abutting portion 28 e, and the piston valve 17 is slid to close the communication hole 20 c of the ejection pipe 18.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an essential part of the ejector according to the first aspect of the present invention when not in use.
[0009]
Reference numeral 10 in the figure denotes a container. The container 10 is made of a plastic material into a bottle shape, and is provided with a screw on the outer periphery of the mouth portion 10a.
[0010]
A pump P is attached to the mouth 10 a of the container 10. The pump P includes a screw cap 11.
[0011]
The screw cap 11 has a slightly short cylindrical shape having a top portion 11a, opens downward, has a female screw on the inner periphery, and has a center hole 11b in the center of the top portion 11a. The inner surface of the top portion 11a is placed on the flange 12a of the cylinder 12, and the female screw is engaged with and attached to the male screw of the mouth portion 10a of the container 10.
[0012]
The cylinder 12 is provided with three step portions 12b, 12c, and 12d in the middle, and gradually decreases in diameter toward the lower side in the figure.
[0013]
The upper portion of the cylinder 12 is formed with a lateral hole 12e penetrating in the radial direction at the position of the first step portion 12b, and projecting the upper end portion outward through the center hole 11b of the screw cap 11.
[0014]
In the lower part of the cylinder 12, a valve seat 12f having a gradually decreasing diameter is formed on the inner side of the third step portion 12d, and a suction passage 12g is continuously provided below the valve seat 12f, while the third step portion 12d is provided. The upward cylindrical portion 12 h is raised from the position, and an annular recess 12 j having an upward opening is formed between the outer surface of the upward cylindrical portion 12 h and the inner surface of the cylinder 12. Further, a plurality of elastic restricting pieces 12m are formed in the upward cylindrical portion 12h so as to protrude inward from the inner surface and are elongated in the circumferential direction. Each elastic restricting piece 12m is gradually inclined inward with the upper end facing upward.
[0015]
And the upper end part of the suction pipe 13 is attached to the lower end part of the cylinder 12, and the inside of the pipe and the inside of the suction passage 12g are connected.
[0016]
Then, the first ball valve 15 is inserted into the cylinder 12, and the first ball valve 15 is placed on the upper end of each elastic restricting piece 12m and then pushed in against elasticity, and each elastic restricting piece 12m is elastically deformed and inserted. The first ball valve 15 is placed on the valve seat 12f. In addition, a coil spring 16 is placed in the cylinder 12 and its lower end is placed in the annular recess 12j, and an ejection pipe 18 having a piston valve 17 attached is placed in the cylinder 12 and placed on the coil spring 16.
[0017]
Thus, the lower pipe 20 of the ejection pipe 18 forms a pipe line 20a from the upper end to the middle of the lower part in the inner center, and a valve seat 20b is provided in the middle of the pipe line 20a to communicate with the lower part of the pipe line 20a. A communication hole 20c penetrating in the radial direction is provided, and a diameter-enlarged cylindrical portion 20d is provided at the lower end. Then, the second ball valve 21 is put in the pipe line 20a and placed on the valve seat 20b, and the piston valve 17 is attached. Then, the upper end is press-fitted into the pipe line 22a of the upper pipe 22 of the ejection pipe 18 to lower the lower pipe. 20 and the upper pipe 22 are connected, and the inside of the pipe line 22a communicates with the inside of the pipe line 20a.
[0018]
The upper pipe 22 of the jet pipe 18 is provided with a diameter-enlarged hole 22b at the lower end of a pipe 22a penetrating vertically, and projects inward from the upper inner surface of the pipe 22a so that a plurality of convex parts 22c are provided in the circumferential direction. , Provided in the vertical direction.
[0019]
The piston valve 17 is made of, for example, a rubber material, and the outer cylinder portion 25 and the inner cylinder portion 26 are formed concentrically and integrally. Then, the upper end portion of the inner cylinder portion 26 is placed in the enlarged diameter hole portion 22b, and the upper end of the inner cylinder portion 26 is pressed against the inner surface of the enlarged diameter hole portion 22b so as to be slidable vertically with respect to the ejection pipe 18. At the same time, the outer surface of the outer cylindrical portion 25 is pressed against the inner surface of the cylinder 12 with a pressing force weaker than the pressing force of the inner cylindrical portion 26 so as to be slidable up and down with respect to the cylinder 12.
[0020]
Thus, a fitting cap 28 is provided at the upper end of the cylinder 12. The fitting cap 28 has a medium-diameter cylindrical portion 28b and a small-diameter cylindrical portion 28c that are formed concentrically and integrally in a cap-shaped outer portion 28a, and faces downward between the medium-diameter cylindrical portion 28b and the small-diameter cylindrical portion 28c. An annular concave portion 28d is provided, a female screw is provided on the upper inner periphery of the small diameter cylindrical portion 28c, and an abutting portion 28e is provided on the lower portion.
[0021]
Then, the upper pipe 22 of the ejection pipe 18 is passed through the small diameter cylindrical portion 28c, the small diameter cylindrical portion 28c is inserted into the upper end portion of the cylinder 12, and the upper end portion of the cylinder 12 is press-fitted into the annular recess 28d. The screw cap 11 is clamped by the medium diameter cylindrical portion 28d on the flange 12a of the cylinder 12. At this time, the abutting portion 28e is abutted against the upper end of the outer cylinder portion 25 of the piston valve 17, and the coil spring 16 is slightly compressed via the ejection pipe 18, and the enlarged diameter cylindrical portion is energized by the urging force of the coil spring 16. The upper end of 20 d is pressed against the lower end of the inner cylinder portion 26 of the piston valve 17 to close the communication hole 20 c of the ejection pipe 18.
[0022]
On the other hand, a push-down button 31 is attached to the upper end of the ejection pipe 18 projecting outside from the fitting cap 28. The push button 31 is provided with a nozzle 31b in the shape of a bowl on the outer periphery of a cap-shaped outer portion 31a, a screw cylinder portion 31c at the center of the inside, and a horizontally long cylinder portion 31d between the male screw cylinder portion 31c and the nozzle 31b. The ejection passage 31e extending from the end of the male threaded cylinder portion 31c to the tip of the nozzle 31b is formed inside. And the upper end part of the said ejection pipe 18 is press-fit in the external thread cylinder part 31c, and the inside of the ejection channel | path 31e and the inside of the said pipe line 22a are connected.
[0023]
When the ejector is used, when the push button 31 is pushed down in the direction of arrow A in FIG. 1 against the coil spring 16 and the ejection pipe 18 is pushed into the cylinder chamber 30, the pressure in the cylinder chamber 30 increases, and the piston The valve 17 is slid upward with respect to the ejection pipe 18 to open the communication hole 20c, and the inside of the pipe line 20a communicates with the inside of the cylinder chamber 30 through the communication hole 20c. Then, the shampoo liquid in the cylinder chamber 30 is sent out into the pipe line 20a through the communication hole 20c, and the second ball valve 21 is pushed up by the liquid pressure and sent out into the pipe line 22a, and from the tip of the nozzle 31b to the outside through the jet passage 31e. And discharge.
[0024]
After that, when the push button 31 is released by releasing the push button 31 at the final push-down stage shown in FIG. 2, the push pipe 18 is pushed up in the direction of arrow B in the figure by the urging force of the coil spring 16. At this time, since the piston valve 17 is pressed more strongly against the jet pipe 18 than the inner surface of the cylinder 12, the piston valve 17 is moved upward together with the jet pipe 18 by the frictional force between the piston valve 17 and the jet pipe 18. Negative pressure is generated in the chamber 30. As shown in FIG. 3, a part of the shampoo liquid in the upper and lower pipes 20a and 22a is sucked into the cylinder chamber 30 through the communication hole 20c, and at the same time, the shampoo liquid near the nozzle 31b is drawn to the back side. Then, the first ball valve 15 is opened and the shampoo liquid in the container 10 is sucked up and sucked into the cylinder chamber 30 from the passage 12g. Eventually, as shown in FIG. 4, after the second ball valve 21 is closed again, the shampoo liquid in the container 10 is sucked into the cylinder chamber 30 when the ejection pipe 18 further moves upward. Thereafter, the upper end of the outer cylinder portion 25 of the piston valve 17 that has moved upward is abutted against the abutting portion 28e, and only the ejection pipe 18 is pushed up a little against the frictional force between the piston valve 17 and the ejection pipe 18, and the piston Slide the valve 17. Then, the upper end of the enlarged cylindrical portion 20d is pressed against the lower end of the inner cylindrical portion 26 of the piston valve 17 to close the communication hole 20c, and the state returns to the state shown in FIG. 1 at the final stage.
[0025]
In the illustrated ejector described above, in order to reduce the size during transportation, the push button 31 is pushed down to the end in the direction of arrow A in FIG. As shown in FIG. 5, after being pushed into the cylinder chamber 30, the push button 31 is rotated to screw the screw cylinder portion 31c onto the female screw in the small diameter cylinder portion 28c, thereby locking the movement of the ejection pipe 18 as shown in FIG. Do it.
[0026]
By the way, in the ejector according to the second aspect of the present invention, there is provided a latching portion a that is engaged when the ejection pipe 18 is pushed in and that also moves up the piston 17 when the ejection pipe 18 is pushed up. That is, as shown in FIG. 6, a convex portion 26 a is formed by projecting inward from the inner surface of the inner cylinder portion 26 of the piston valve 17, and a step portion 20 e is formed on the outer periphery of the intermediate portion of the lower tube 20 of the ejection pipe 18. The projecting portion 26a and the stepped portion 20e form a latching portion a.
[0027]
When the ejector is used, if the push button 31 is pushed down to push the ejection pipe 18 into the cylinder chamber 30, the pressure in the cylinder chamber 30 increases, and the piston valve 17 is connected to the ejection pipe 18 as shown in FIG. In contrast to the ejector shown in FIGS. 1 to 5 described above, the contents in the cylinder chamber 30 are moved to the nozzles by sliding upward to open the communication hole 20c and engaging the projection 26a and the step 20e. The liquid is discharged from the tip of 31b to the outside.
[0028]
On the other hand, when the ejection of the ejection pipe 18 is released and the ejection pipe 18 is pushed up by the urging force of the coil spring 16, the piston valve 17 is also moved up together with the ejection pipe 18 by the engagement at the latching portion a. As in the case of the ejector shown in FIGS. 1 to 5, a part of the shampoo liquid in the upper and lower pipes 20a and 22a is communicated until the second ball valve 21 is again placed on the valve seat 20b. The shampoo liquid in the vicinity of the nozzle 31 b is drawn into the back side and the shampoo liquid in the container 10 is sucked into the cylinder chamber 30 at the same time. Then, the upper end of the outer cylinder portion 25 of the piston valve 17 that has moved upward is abutted against the abutting portion 28e, and only the ejection pipe 18 is further pushed up to release the engagement at the latching portion a, and the piston valve 17 is slid. Then, the communication hole 20c is closed and the state shown in FIG.
[0029]
In the embodiment shown in FIGS. 6 and 7, the latching portion a is formed by the convex portion 26a on the piston valve 17 side and the step portion 20e on the ejection pipe 18 side. However, the present invention is not limited to this, and the latching portion may be formed by a step portion on the piston valve 17 side and a convex portion on the ejection pipe 18 side, although not shown, It is good also as a structure formed with the convex part by the side of the ejection pipe 18. FIG.
[0030]
【The invention's effect】
From the above, according to the first and second aspects of the invention, when the push-in of the ejection pipe is released and the ejection pipe is pushed up by the urging force, the piston valve also moves up, while the ball valve is closed. Then, the piston valve that has moved on the butting part slides against the abutment part and closes the communication hole of the ejection pipe, so part of the contents remaining in the ejection pipe are sucked into the cylinder chamber until the ball valve is closed. The contents in the vicinity of the nozzle can be pulled into the back of the nozzle to prevent the contents from dripping from the tip of the nozzle after use, and the container and its surroundings can be prevented from being soiled by the contents dripping as before. be able to.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part of a shampoo jetting device according to the first aspect of the invention when not in use;
FIG. 2 is a vertical cross-sectional view of the main part of the ejector at the final pressing stage of the push button during its use.
FIG. 3 shows a longitudinal section of the main part of the ejector showing the state in which the contents in the ejection pipe and the contents in the container are sucked into the cylinder chamber while the ejection pipe is being pushed up after releasing the pressed button. FIG.
FIG. 4 is a longitudinal sectional view of the main part of the ejector in a state where the second ball valve is again placed on the valve seat while the ejection pipe is being pushed up.
FIG. 5 is a longitudinal sectional view of a main part in a state where the ejection pipe is pushed in and locked during transportation of the ejector.
FIG. 6 is a longitudinal sectional view of an essential part of the shampoo jetting device according to the second aspect of the invention when not in use.
FIG. 7 is a longitudinal sectional view of the main part of the ejector at the final pressing stage of the push button during use.
FIG. 8 is a longitudinal sectional view of a main part of the conventional ejector when not in use.
[Explanation of symbols]
10 container 17 piston valve 18 ejection pipe 20c communication hole 21 ball valve 28e butting portion 30 cylinder chamber 31b nozzle a latching portion

Claims

A jet pipe is inserted into the cylinder and the jet pipe is pushed in to increase the pressure in the cylinder chamber, and a piston valve provided between the cylinder and the jet pipe is slidably contacted with the cylinder to slide to form a communication hole of the jet pipe. While opening, communicating the inside of the ejection pipe with the cylinder chamber through the communication hole, and discharging the contents in the cylinder chamber from the nozzle through the inside of the ejection pipe,
When the push-in of the jet pipe is released, the jet pipe is pushed up based on the urging force, the piston valve is slid to close the communication hole of the jet pipe, and the cylinder chamber is negatively pressurized so that the contents in the container In the ejector that sucks up
A ball valve is provided in the ejection pipe, and when the ejection pipe is pushed in and communicated with the cylinder chamber, the ejection pipe is opened, and when the ejection pipe is released and pushed up, the ejection pipe is closed.
While pressing the piston valve against the cylinder with a pressing force weaker than the pressing force against the ejection pipe, while pushing up the ejection pipe, the piston valve also moves up,
After closing the ball valve, it slides against the piston valve that has moved upward, and forms an abutting portion that closes the communication hole,
Ejector.

A jet pipe is inserted into the cylinder and the jet pipe is pushed in to increase the pressure in the cylinder chamber, and a piston valve provided between the cylinder and the jet pipe is slidably brought into sliding contact with the cylinder 12 to communicate with the jet pipe. While communicating the inside of the ejection pipe with the cylinder chamber through the communication hole, and discharging the contents in the cylinder chamber from the nozzle through the inside of the ejection pipe,
When the push-in of the jet pipe is released, the jet pipe is pushed up based on the urging force, the piston valve is slid to close the communication hole of the jet pipe, and the cylinder chamber is negatively pressurized so that the contents in the container In the ejector that sucks up
A ball valve is provided in the ejection pipe, and when the ejection pipe is pushed in and communicated with the cylinder chamber, the ejection pipe is opened, and when the ejection pipe is released and pushed up, the ejection pipe is closed.
While engaging the push-in pipe, and when the push-up pipe is pushed up, the piston valve also moves up together while providing a latching part between the piston valve and the jet pipe,
After closing the ball valve, the piston valve that has moved upward is abutted to release the engagement at the latching part, and the abutting part that slides to close the communication hole is formed.
Ejector.