JPH0216765Y2 - - Google Patents

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Publication number
JPH0216765Y2
JPH0216765Y2 JP1984122845U JP12284584U JPH0216765Y2 JP H0216765 Y2 JPH0216765 Y2 JP H0216765Y2 JP 1984122845 U JP1984122845 U JP 1984122845U JP 12284584 U JP12284584 U JP 12284584U JP H0216765 Y2 JPH0216765 Y2 JP H0216765Y2
Authority
JP
Japan
Prior art keywords
nozzle
side wall
nozzle insertion
insertion port
cylindrical part
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.)
Expired
Application number
JP1984122845U
Other languages
Japanese (ja)
Other versions
JPS6138378U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP12284584U priority Critical patent/JPS6138378U/en
Publication of JPS6138378U publication Critical patent/JPS6138378U/en
Application granted granted Critical
Publication of JPH0216765Y2 publication Critical patent/JPH0216765Y2/ja
Granted legal-status Critical Current

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  • Check Valves (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Description

【考案の詳細な説明】 考案の背景 技術分野 本考案は、医療器具用いられて好適な医療用逆
止弁に関する。
[Detailed Description of the Invention] Background Technical Field of the Invention The present invention relates to a medical check valve suitable for use in medical equipment.

従来技術 一般に医療器具においては、例えば、血液回路
への薬剤の混注、血液回路からの血液の採取、バ
ルーンカテーテルのバルーンへの気体の注入等の
ために、気体もしくは液体をノズルにより注入、
吸引可能とする逆止弁を多用している。
BACKGROUND ART In general, medical devices inject gas or liquid through a nozzle, for example, to co-inject drugs into a blood circuit, collect blood from a blood circuit, inject gas into a balloon of a balloon catheter, etc.
Check valves are frequently used to enable suction.

しかしながら、従来の逆止弁は、弁体を弁座に
押圧してなる閉弁状態の形成手段として、ばねを
用いており、構造が複雑かつ大型化している。
However, conventional check valves use a spring as a means for pressing the valve body against the valve seat to form a closed state, resulting in a complicated and large structure.

本考案は、ノズルにより気体もしくは液体を注
入、吸引するための逆止弁を、単純かつ小型化す
ることを目的とする。
The present invention aims to simplify and miniaturize a check valve for injecting or suctioning gas or liquid through a nozzle.

課題を解決するための手段 請求項1に記載の本考案は、一端が開口端であ
りノズル挿入口を側壁に有する外筒部と、該外筒
部の開口端に挿入される一端が連通口となつてお
り外筒部の内面に密着状態で嵌着し外筒部のノズ
ル挿入口を閉止する上記連通口近傍の側壁を有す
る内筒部とからなる逆止弁であつて、前記内筒部
の側壁は、外筒部のノズル挿入口に挿入されるノ
ズルの先端部が加える押圧によつて、内筒部の内
方に弾性変形する可撓性を有し、該変形によりノ
ズル挿入口に外筒部および内筒部の内部空間との
連通状態を形成でき、該内筒部が閉塞状態の時、
該外筒部と該内筒部の少なくとも一方が、該内筒
部の側壁に押圧せしめられるノズルの先端開口の
閉塞を防止する閉塞防止構造を備えるようにした
ものである。
Means for Solving the Problems The present invention as set forth in claim 1 includes an outer cylindrical portion having an open end at one end and a nozzle insertion port in the side wall, and a communicating port at one end inserted into the open end of the outer cylindrical portion. and an inner cylindrical part having a side wall near the communication port that fits tightly onto the inner surface of the outer cylindrical part and closes the nozzle insertion port of the outer cylindrical part. The side wall of the part has flexibility to be elastically deformed inward of the inner cylinder part by the pressure applied by the tip of the nozzle inserted into the nozzle insertion port of the outer cylinder part. A communication state can be formed between the inner space of the outer cylinder part and the inner cylinder part, and when the inner cylinder part is in a closed state,
At least one of the outer cylinder part and the inner cylinder part is provided with a blockage prevention structure that prevents the tip opening of the nozzle pressed against the side wall of the inner cylinder part from being blocked.

請求項2に記載の本考案は、前記閉塞防止構造
が、前記ノズル挿入口に臨む内筒部の側壁を、一
部外方に突起させたものである。
According to a second aspect of the present invention, the blocking prevention structure has a side wall of the inner cylinder portion facing the nozzle insertion port partially protruding outward.

請求項3に記載の本考案は、前記閉塞防止構造
が、前記外筒部のノズル挿入口を、該ノズル挿入
口に臨む内筒部の側壁に傾斜配置させたものであ
る。
In the present invention as set forth in claim 3, the blocking prevention structure is such that the nozzle insertion port of the outer cylinder portion is inclinedly arranged on the side wall of the inner cylinder portion facing the nozzle insertion port.

作用 請求項1に記載の本考案によれば、外筒部に設
けたノズル挿入口から挿入されるノズルの先端に
て押圧される内筒部の側壁の弾性変形により、ノ
ズル挿入口に開弁状態もしくは閉弁状態を形成す
ることが可能となり、構造が単純で小型化可能な
逆止弁を得ることが可能となる。
According to the present invention as set forth in claim 1, the valve is opened at the nozzle insertion port by elastic deformation of the side wall of the inner cylinder portion that is pressed by the tip of the nozzle inserted from the nozzle insertion port provided in the outer cylinder portion. It becomes possible to form a state or a closed state, and it becomes possible to obtain a check valve that has a simple structure and can be miniaturized.

そして、ノズル挿入口に挿入されるノズルの先
端部にて内筒部の側壁を押圧する時、外筒部と内
筒部の少なくとも一方に設けた閉塞防止構造の存
在により、ノズルの先端開口に閉塞を生ずること
なく内筒部の側壁を変形せしめ、液体を確実に注
入、吸引できる。
When the tip of the nozzle inserted into the nozzle insertion port presses the side wall of the inner tube, the anti-occlusion structure provided on at least one of the outer tube and the inner tube prevents the tip opening of the nozzle from closing. The side wall of the inner cylinder part can be deformed without causing blockage, and liquid can be reliably injected and aspirated.

請求項2に記載の本考案によれば、上記閉塞防
止構造を内筒部の外面に簡易に形成できる。
According to the present invention as set forth in claim 2, the blocking prevention structure can be easily formed on the outer surface of the inner cylindrical portion.

請求項3に記載の本考案によれば、上記閉塞防
止構造を外筒部にて簡易に形成できる。
According to the present invention as set forth in claim 3, the blocking prevention structure can be easily formed in the outer cylindrical portion.

考案の具体的説明 第1図は本考案の第一実施例に係る逆止弁10
を示す断面図、第2図は同逆止弁の内筒部を取出
して示す正面図である。
Detailed explanation of the invention FIG. 1 shows a check valve 10 according to a first embodiment of the invention.
FIG. 2 is a front view showing the inner cylindrical portion of the check valve taken out.

逆止弁10は、外筒部11と内筒部12とから
なる。
The check valve 10 includes an outer cylinder part 11 and an inner cylinder part 12.

外筒部11は、一端が閉じた略円筒形状であ
り、側壁にノズル挿入口13を備えている。
The outer cylinder part 11 has a substantially cylindrical shape with one end closed, and has a nozzle insertion opening 13 in the side wall.

外筒部11の材質としては、硬質プラスチツ
ク、エンジニアリングプラスチツク等の硬質材料
が好ましく、例えば、ポリカーボネート、ナイロ
ン等がある。
The material for the outer cylinder portion 11 is preferably a hard material such as hard plastic or engineering plastic, such as polycarbonate or nylon.

内筒部12は、一端に連通口14を形成されて
なる円筒形状であり、連通口14の近傍の側壁に
よつて外筒部11のノズル挿入口13を閉止可能
とするように、外筒部11内に挿入され、外筒部
11の内面に密着状態で嵌着される。
The inner cylinder part 12 has a cylindrical shape with a communication port 14 formed at one end. It is inserted into the section 11 and is fitted tightly onto the inner surface of the outer cylindrical section 11.

内筒部12の材質としては、高分子エラストマ
ー材料、可撓性合成樹脂材料等の可撓性材料で形
成されている。高分子エラストマー材料として
は、天然ゴムおよび合成ゴム、例えばスチレン−
ブタジエンゴム、クロロプレンゴム、ブチルゴ
ム、ニトリルゴム、エチレン−プロピレンゴム、
ウレタンゴム、シリコンゴム等がある。また、可
撓性合成樹脂材料としては、軟質塩化ビニール樹
脂、ポリアミドエラストマー、ポリウレタンエラ
ストマー、飽和ポリエステルエラストマー等があ
る。
The inner cylinder portion 12 is made of a flexible material such as a polymer elastomer material or a flexible synthetic resin material. Polymeric elastomer materials include natural and synthetic rubbers, such as styrene.
Butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, ethylene-propylene rubber,
There are urethane rubber, silicone rubber, etc. Examples of flexible synthetic resin materials include soft vinyl chloride resin, polyamide elastomer, polyurethane elastomer, and saturated polyester elastomer.

すなわち、逆止弁10は、外筒部11のノズル
挿入口13に挿入される注射筒等のノズル15の
先端部によつて内筒部12の側壁を押圧すること
により、内筒部12の側壁を内筒部12の内方に
弾性変形させ、ノズル挿入口13に外筒部11お
よび内筒部12の内部空間との連通状態を形成可
能とする。
That is, the check valve 10 operates by pressing the side wall of the inner cylinder part 12 with the tip of a nozzle 15 such as a syringe inserted into the nozzle insertion port 13 of the outer cylinder part 11 . The side wall is elastically deformed inward of the inner cylinder part 12 to enable the nozzle insertion port 13 to communicate with the inner spaces of the outer cylinder part 11 and the inner cylinder part 12.

さらに、逆止弁10は、ノズル15の先端開口
を閉塞防止する手段として以下の構造を備える。
即ち、ノズル挿入口13を臨む内筒部12の側壁
に、ノズル15をノズル挿入口13に挿入した場
合、内筒部12の外周壁がノズル15の先端開口
21を閉塞することを防止するための突起部23
を形成したものである。なお、突起部23には、
ノズル15から流入される液体の流入をより容易
とする溝部22を有している。
Furthermore, the check valve 10 has the following structure as a means for preventing the tip opening of the nozzle 15 from being blocked.
That is, in order to prevent the outer circumferential wall of the inner cylinder part 12 from blocking the tip opening 21 of the nozzle 15 when the nozzle 15 is inserted into the nozzle insertion port 13, the side wall of the inner cylinder part 12 facing the nozzle insertion port 13 is provided. protrusion 23
was formed. Note that the protrusion 23 has
It has a groove 22 that facilitates the inflow of liquid from the nozzle 15.

また、突起部23の表面形状を三角形、四角
形、半円状等とし、シリンジのノズルが接した時
ノズルを完全に封止しない形状とすれば、上記溝
部22を設ける必要はない。
Further, if the surface shape of the protrusion 23 is triangular, square, semicircular, etc. and does not completely seal the nozzle of the syringe when it comes into contact with it, it is not necessary to provide the groove 22.

考案の具体的作用 逆止弁10は、通常状態下で、内筒部12の側
壁が外筒部11の内面に気密もしくは液密状態で
密着し、ノズル挿入口13に閉止状態すなわち閉
弁状態を形成する。他方、逆止弁10は、ノズル
挿入口13に挿入されるノズル15の先端部が、
ノズル挿入口13を臨む内筒部12の側壁を押圧
し、内筒部12の側壁を弾性変形させる状態下
で、ノズル挿入口13に外筒部11および内筒部
12の内部空間との連通状態、すなわち開弁状態
を形成する。また、逆止弁10は、ノズル挿入口
13に開弁状態を形成してなるノズル15の先端
部をノズル挿入口13から抜去した時、内筒部1
2の側壁の弾性的な復元による外筒部11の内面
との再密着により、ノズル挿入口13に再び閉弁
状態を形成する。
Specific operation of the invention In the check valve 10, under normal conditions, the side wall of the inner cylindrical portion 12 is in close contact with the inner surface of the outer cylindrical portion 11 in an air-tight or liquid-tight state, and the nozzle insertion port 13 is in a closed state, that is, a closed state. form. On the other hand, in the check valve 10, the tip of the nozzle 15 inserted into the nozzle insertion port 13 is
The nozzle insertion port 13 is communicated with the internal spaces of the outer cylinder portion 11 and the inner cylinder portion 12 under a condition in which the side wall of the inner cylinder portion 12 facing the nozzle insertion port 13 is pressed and the side wall of the inner cylinder portion 12 is elastically deformed. state, that is, the valve open state. In addition, when the distal end of the nozzle 15 which is formed in the nozzle insertion port 13 in an open state is removed from the nozzle insertion port 13, the check valve 10 opens the inner cylinder portion 1
The elastic restoration of the side wall 2 brings the nozzle insertion port 13 into close contact with the inner surface of the outer cylindrical portion 11 again, thereby forming the nozzle insertion port 13 in a closed state again.

さらに、この逆止弁20によれば、ノズル15
の先端開口を閉塞防止する突起部23の存在によ
り、ノズル挿入口13に挿入されてなるノズル1
5の先端部を内筒部12の側壁に押圧する時、ノ
ズル15の先端開口21が閉塞することなく、内
筒部12の側壁を変形可能であり、従つて気体も
しくは液体の注入経路、吸引経路を閉塞する恐れ
なく、ノズル挿入口13に開弁状態を形成可能で
ある。
Furthermore, according to this check valve 20, the nozzle 15
The nozzle 1 inserted into the nozzle insertion port 13 has the protrusion 23 that prevents the tip opening from being blocked.
When the tip of the nozzle 15 is pressed against the side wall of the inner tube 12, the side wall of the inner tube 12 can be deformed without the tip opening 21 of the nozzle 15 being blocked. It is possible to create an open state in the nozzle insertion port 13 without fear of blocking the path.

第3図は本考案の第二実施例に係る逆止弁30
を示す断面図である。逆止弁30が前記逆止弁1
0と異なる点は、ノズル15の先端開口を閉塞防
止する手段として、ノズル挿入口13Aの軸線
が、ノズル挿入口13Aを臨む内筒部12の側壁
に傾斜配置されてなることにある。
FIG. 3 shows a check valve 30 according to a second embodiment of the present invention.
FIG. The check valve 30 is the same as the check valve 1.
0 is that the axis of the nozzle insertion port 13A is inclined on the side wall of the inner cylindrical portion 12 facing the nozzle insertion port 13A as a means for preventing the tip opening of the nozzle 15 from being blocked.

この逆止弁30によれば、ノズル挿入口13A
に挿入されてなるノズル15の先端部を内筒部1
2の側壁に押圧する時、ノズル15の先端部が内
筒部12の側壁に垂直に接することが回避され、
ノズル15の先端開口が閉塞することなく、内筒
部12の側壁を変形可能であり、従つて気体もし
くは液体の注入経路、吸引経路を閉塞する恐れな
く、ノズル挿入口13Aに開弁状態を形成可能で
ある。
According to this check valve 30, the nozzle insertion port 13A
The tip of the nozzle 15 inserted into the inner cylinder part 1
When pressing against the side wall of the inner cylinder part 12, the tip of the nozzle 15 is prevented from touching the side wall of the inner cylinder part 12 perpendicularly,
The side wall of the inner cylindrical portion 12 can be deformed without the tip opening of the nozzle 15 being blocked, and therefore the nozzle insertion port 13A can be opened in an open state without the risk of blocking the gas or liquid injection path or suction path. It is possible.

考案の効果 以上のように、本考案によれば、ノズルにより
気体もしくは、液体を注入、吸引するための逆止
弁を、単純かつ小型化することができる。
Effects of the invention As described above, according to the invention, a check valve for injecting or sucking gas or liquid through a nozzle can be made simple and compact.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本考案の第一実施例に係る逆止弁を示
す断面図、第2図は同逆止弁の内筒部を取り出し
て示す正面図、第3図は本考案の第二実施例に係
る逆止弁を示す断面図である。 10……逆止弁、11……外筒部、12……内
筒部、13……ノズル挿入口、14……連通口、
15……ノズル、21……先端開口、22……溝
部、23……突起部、30……逆止弁、13A…
…ノズル挿入口。
Fig. 1 is a sectional view showing a check valve according to a first embodiment of the present invention, Fig. 2 is a front view showing the inner cylindrical portion of the check valve taken out, and Fig. 3 is a second embodiment of the present invention. It is a sectional view showing a check valve concerning an example. 10...Check valve, 11...Outer cylinder part, 12...Inner cylinder part, 13...Nozzle insertion port, 14...Communication port,
15...Nozzle, 21...Tip opening, 22...Groove, 23...Protrusion, 30...Check valve, 13A...
...Nozzle insertion port.

Claims (1)

【実用新案登録請求の範囲】 (1) 一端が開口端でありノズル挿入口を側壁に有
する外筒部と、該外筒部の開口端に挿入される
一端が連通口となつており外筒部の内面に密着
状態で嵌着し外筒部のノズル挿入口を閉止する
上記連通口近傍の側壁を有する内筒部とからな
る逆止弁であつて、前記内筒部の側壁は、外筒
部のノズル挿入口に挿入されるノズルの先端部
が加える押圧によつて、内筒部の内方に弾性変
形する可撓性を有し、該変形によりノズル挿入
口に外筒部および内筒部の内部空間との連通状
態を形成でき、該内筒部が閉塞状態の時、該外
筒部と該内筒部の少なくとも一方が、該内筒部
の側壁に押圧せしめられるノズルの先端開口の
閉塞を防止する閉塞防止構造を備えることを特
徴とする医療用逆止弁。 (2) 前記閉塞防止構造が、前記ノズル挿入口に臨
む内筒部の側壁を、一部外方に突起させたもの
である実用新案登録請求の範囲第1項記載の医
療用逆止弁。 (3) 前記閉塞防止構造が、前記外筒部のノズル挿
入口を、該ノズル挿入口に臨む内筒部の側壁に
傾斜配置させたものである実用新案登録請求の
範囲第1項記載の医療用逆止弁。
[Claims for Utility Model Registration] (1) An outer cylindrical portion having an open end at one end and a nozzle insertion port in the side wall, and an outer cylindrical portion having a communication port at one end inserted into the open end of the outer cylindrical portion. and an inner cylindrical part having a side wall in the vicinity of the communication port that fits tightly onto the inner surface of the outer cylindrical part and closes the nozzle insertion port of the outer cylindrical part, the side wall of the inner cylindrical part is It has the flexibility to elastically deform inward of the inner cylinder part by the pressure applied by the tip of the nozzle inserted into the nozzle insertion opening of the cylinder part, and due to this deformation, the outer cylinder part and the inner cylinder part are inserted into the nozzle insertion opening. A tip of a nozzle that can form a communication state with an internal space of the cylindrical part, and has at least one of the outer cylindrical part and the inner cylindrical part pressed against a side wall of the inner cylindrical part when the inner cylindrical part is in a closed state. A medical check valve characterized by having an anti-occlusion structure that prevents an opening from being occluded. (2) The medical check valve according to claim 1, wherein the blockage prevention structure includes a side wall of the inner cylindrical portion facing the nozzle insertion port that partially protrudes outward. (3) The medical device according to claim 1, wherein the blockage prevention structure is such that the nozzle insertion port of the outer cylinder portion is arranged at an angle on the side wall of the inner cylinder portion facing the nozzle insertion port. Check valve for use.
JP12284584U 1984-08-13 1984-08-13 medical check valve Granted JPS6138378U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12284584U JPS6138378U (en) 1984-08-13 1984-08-13 medical check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12284584U JPS6138378U (en) 1984-08-13 1984-08-13 medical check valve

Publications (2)

Publication Number Publication Date
JPS6138378U JPS6138378U (en) 1986-03-10
JPH0216765Y2 true JPH0216765Y2 (en) 1990-05-09

Family

ID=30681601

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12284584U Granted JPS6138378U (en) 1984-08-13 1984-08-13 medical check valve

Country Status (1)

Country Link
JP (1) JPS6138378U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11848249B2 (en) 2019-09-26 2023-12-19 Fujifilm Corporation Manufacturing method for thermal conductive layer, manufacturing method for laminate, and manufacturing method for semiconductor device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4500619B2 (en) * 2004-08-09 2010-07-14 株式会社トップ Medical connector
JP2012145212A (en) * 2011-01-06 2012-08-02 Minoru Nakamura Check valve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922472U (en) * 1972-05-30 1974-02-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922472U (en) * 1972-05-30 1974-02-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11848249B2 (en) 2019-09-26 2023-12-19 Fujifilm Corporation Manufacturing method for thermal conductive layer, manufacturing method for laminate, and manufacturing method for semiconductor device

Also Published As

Publication number Publication date
JPS6138378U (en) 1986-03-10

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