JPH0731681A - Hub for syringe, connecting structure for hub, syringe, method for assembling of syringe and piston used in syringe - Google Patents
Hub for syringe, connecting structure for hub, syringe, method for assembling of syringe and piston used in syringeInfo
- Publication number
- JPH0731681A JPH0731681A JP5202643A JP20264393A JPH0731681A JP H0731681 A JPH0731681 A JP H0731681A JP 5202643 A JP5202643 A JP 5202643A JP 20264393 A JP20264393 A JP 20264393A JP H0731681 A JPH0731681 A JP H0731681A
- 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
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、
注射器用のハブ及び、ハブの接続構造及び、注射器の組
立方法及び、注射器で使用するピストンに関する。BACKGROUND OF THE INVENTION The present invention relates to a disposable syringe,
The present invention relates to a hub for a syringe, a connecting structure for the hub, a method for assembling the syringe, and a piston used in 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、使用直後にピ
ストンの操作により、該ピストンと、注射針が接合され
ているハブとを互いに係合させて、該ハブとともに該注
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。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、ハブの接続構造及
び、注射器及び、注射器の組立方法及び、注射器で使用
するピストンを提供することを目的としている。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 operating the piston immediately after use, the piston and the hub to which the injection needle is joined are engaged with each other, and by inserting the injection needle together with the hub into the syringe of the syringe,
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. In view of the above circumstances, the present invention provides a hub for a syringe, which is a disposable syringe, which allows safe work from immediately after use to disposal, and facilitates assembly and operation. Another object of the present invention is to provide a hub connecting structure, a syringe, a method for assembling the syringe, and a piston used in the syringe.
【０００４】[0004]
【課題を解決するための手段】即ち、本発明のうち第１
の発明は、ピストン（２３）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
ｃ、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）の一端（１１ａ）に、注射針（２１）を挿入し得る
針挿入孔（１２）を、前記ハブ本体（９０）の軸心方向
（矢印Ａ、Ｂ方向）に設け、前記ハブ本体（９０）の他
端（１０ｂ）に、ハブ側係合手段（１５）を、前記ピス
トン（２３）と係合自在にかつ、前記針挿入孔（１２）
との間で連通空間（１３、１５）を形成する形で設けて
構成した。また、本発明のうち第２の発明は、第１の発
明のハブ（９）において、シ−ル部（１０ｃ）を溝の形
で形成して構成した。また、本発明のうち第３の発明
は、第１の発明のハブ（９）において、シ−ル部（５
７、６１）を突条の形で形成して構成した。また、本発
明のうち第４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１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）の内周面にハブシ−ル部
（７ａ、７ｄ、５９）を環状に設けると共に、前記ハブ
本体（９０）のシ−ル部（１０ｃ、５７、６１）を該ハ
ブシール部（７ａ、７ｄ、５９）に対して所定の接触圧
力（Ｆ１）で接触係合させた形で設けて構成した。ま
た、本発明のうち第５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の接続構
造において、前記ハブ挿着穴（４ｂ）に第２の発明のハ
ブ（９）のハブ本体（９０）を、前記ハブ挿着穴（４
ｂ）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（１０ｃ）を該ハ
ブシール部（７ｄ）に対して所定の接触圧力（Ｆ１）で
接触係合させた形で設けて構成した。また、本発明のう
ち第６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の接続構造において、
前記ハブ挿着穴（４ｂ）に第３の発明のハブのハブ本体
（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（９
０）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（Ｆ１）で接触係合させた形で設け
て構成した。また、本発明のうち第７の発明は、第５又
は第６の発明のハブの接続構造において、前記シール部
（１０ｃ、５７）の幅と前記ハブシール部（７ｄ、５
９）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８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３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（Ｆ１）で接触係
合させた形で設けて構成した。また、本発明のうち第９
の発明は、第４又は第５又は第６又は第８の発明のハブ
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（８ａ）側から前記ハブ挿着穴（４ｂ）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１０の発明は、第４又は第５又は第６又は第８の発明
のハブ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（８ａ）の周囲に１個以上のスリット（５
０）を形成して構成した。また、本発明のうち第１１の
発明は、第４の発明の接続構造をなすシリンジ（１０
０）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）の内部を軸方向（矢印Ａ、Ｂ
方向）に閉塞する形のピストン（２３）を、前記シリン
ジ本体（２）に対して軸方向（矢印Ａ、Ｂ方向）に移動
自在に設け、前記ピストン（２３）に、前記ハブ（９）
のハブ側係合手段（１５）と係合し得るピストン側係合
手段（３１）を、前記ハブ側係合手段（１５）に対向す
る形で設け、前記ハブ（９）の針挿入孔（１２）に、注
射針（２１）を設けて構成した。また、本発明のうち第
１２の発明は、第５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）の内部を軸方向（矢印
Ａ、Ｂ方向）に閉塞する形のピストン（２３）を、前記
シリンジ本体（２）に対して軸方向（矢印Ａ、Ｂ方向）
に移動自在に設け、前記ピストン（２３）に、前記ハブ
（９）のハブ側係合手段（１５）と係合し得るピストン
側係合手段（３１）を、前記ハブ側係合手段（１５）に
対向する形で設け、前記ハブ（９）の針挿入孔（１２）
に、注射針（２１）を設けて構成した。また、本発明の
うち第１３の発明は、第６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）の内部を軸方向（矢
印Ａ、Ｂ方向）に閉塞する形のピストン（２３）を、前
記シリンジ本体（２）に対して軸方向（矢印Ａ、Ｂ方
向）に移動自在に設け、前記ピストン（２３）に、前記
ハブ（９）のハブ側係合手段（１５）と係合し得るピス
トン側係合手段（３１）を、前記ハブ側係合手段（１
５）に対向する形で設け、前記ハブ（９）の針挿入孔
（１２）に、注射針（２１）を設けて構成した。また、
本発明のうち第１４の発明は、第８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）の内部を軸
方向（矢印Ａ、Ｂ方向）に閉塞する形のピストン（２
３）を、前記シリンジ本体（２）に対して軸方向（矢印
Ａ、Ｂ方向）に移動自在に設け、前記ピストン（２３）
に、前記ハブ（９）のハブ側係合手段（１５）と係合し
得るピストン側係合手段（３１）を、前記ハブ側係合手
段（１５）に対向する形で設け、前記ハブ（９）の針挿
入孔（１２）に、注射針（２１）を設けて構成した。ま
た、本発明のうち第１５の発明は、第１２又は第１３の
発明の注射器（１）において、前記シール部（１０ｃ、
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１６
の発明は、第１１又１２又は１３又は１４の発明の注射
器（１）において、前記ピストン（２３）はピストン本
体（２５）が操作部（２７）と液押圧部（２９、３０、
３３）の間で折取り自在に構成された。また、本発明の
うち第１７の発明は、第１６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（３
ｂ）を、前記ピストン（２３）の液押圧部（２９、３
０、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１８の
発明は、第１６の発明の注射器（１）において、前記ピ
ストン（２３）のピストン本体（２５）には折取り用切
欠き（２６）が形成されている。また、本発明のうち第
１９の発明は、第１７の発明の注射器（１）において、
前記ピストン（２３）のピストン本体（２５）には折取
り用切欠き（２６）が形成されている。また、本発明の
うち第２０の発明は、第１９の発明の注射器（１）にお
いて、前記切り欠き（２６）は、前記ピストン（２３）
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２１の発明は、第１
１又は第１２又は第１３又は第１４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（１０ｃ、５７、６１）と前記ハブ挿着穴（４ｂ）
のハブシ−ル部（７ａ、７ｄ、５９）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（２３）を挿入し、前記ハブ（９）の針挿入孔
（１２）に、注射針（２１）を挿入接続して構成した。
また、本発明のうち第２２の発明は、第１１又は第１２
又は第１３又は第１４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（２３）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
（１０ｃ、５７、６１）と前記ハブ挿着穴（４ｂ）のハ
ブシ−ル部（７ａ、７ｄ、５９）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（２１）を挿入接続して構成した。ま
た、本発明のうち第２３の発明は、第１１又は第１２又
は第１３又は第１４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（２３）を挿入
し、注射針（２１）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（１０ｃ、５７、６
１）と前記ハブ挿着穴（４ｂ）のハブシ−ル部（７ａ、
７ｄ、５９）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２４の発明は、第１
１又は第１２又は第１３又は第１４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
３）を挿入し、注射針（２１）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（８ａ）に対して挿入し、前
記ハブ（９）を、該ハブ（９）のシ−ル部（１０ｃ、５
７、６１）と前記ハブ挿着穴（４ｂ）のハブシ−ル部
（７ａ、７ｄ、５９）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２５の発明
は、第１１又は第１２又は第１３又は第１４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
（２３）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（１０ｃ、５７、６１）と前記ハブ挿
着穴（４ｂ）のハブシ−ル部（７ａ、７ｄ、５９）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（２１）を挿入接続して
構成した。また、本発明のうち第２６の発明は、内部
（２ａ）に液保持空間（５３）が形成された筒状のシリ
ンジ（１００）を有し、前記シリンジ（１００）にハブ
（９）を着脱自在に挿着して設け、前記ハブ（９）の前
記液保持空間（５３）に背向した側に注射針（２１）を
接合して設け、前記ハブ（９）に、該ハブ（９）の前記
シリンジ（１００）の液保持空間（５３）に対向した端
部（１０ｂ）に開口部（１７ｂ）を形成する形でハブ側
係合手段（１５）を、前記注射針（２１）の液流通孔
（２１ａ）と連通した連通空間（１５、１３）を形成す
る形で設け、前記シリンジ（１００）に、該シリンジ
（１００）の内部（２ａ）を軸方向（矢印Ａ、Ｂ方向）
に閉塞する形のピストン（２３）を、前記シリンジ（１
００）に対して軸方向（矢印Ａ、Ｂ方向）に移動自在に
設け、前記ピストン（２３）にピストン側係合手段（３
１）を、前記ハブ（９）のハブ側係合手段（１５）に対
向する形で、該ハブ側係合手段（１５）に対して挿入係
合自在に設け、前記ピストン側係合手段（３１）に、該
ピストン側係合手段（３１）が前記ハブ（９）と当接し
た際に、前記連通空間（１５、１３）と前記液保持空間
（５３）を連通する第一バイパス手段（３２、３９）を
形成して構成した。また、本発明のうち第２７の発明
は、第２６の発明の注射器（１）において、前記第一バ
イパス手段は前記ピストン側係合手段（３１）の表面
（３１ｃ）に沿って形成された溝（３２）である。ま
た、本発明のうち第２８の発明は、第２６の発明の注射
器（１）において、前記第一バイパス手段は前記ピスト
ン側係合手段（３１）に穿設された孔（３９）である。
また、本発明のうち第２９の発明は、内部（２ａ）に液
保持空間（５３）が形成された筒状のシリンジ（１０
０）を有し、前記シリンジ（１００）にハブ（９）を着
脱自在に挿着して設け、前記ハブ（９）の前記液保持空
間（５３）に背向した側に注射針（２１）を接合して設
け、前記ハブ（９）に、該ハブ（９）の前記シリンジ
（１００）の液保持空間（５３）に対向した端部（１０
ｂ）に開口部（１７ｂ）を形成する形でハブ側係合手段
（１５）を、前記注射針（２１）の液流通孔（２１ａ）
と連通した連通空間（１３、１５）を形成する形で設
け、前記ハブ（９）に、前記液保持空間（５３）と前記
連通空間（１３、１５）とを連通する第二バイパス手段
（４０、４１）を形成し、前記シリンジ（１００）に、
該シリンジ（１００）の内部（２ａ）を軸方向（矢印
Ａ、Ｂ方向）に閉塞する形のピストン（２３）を、前記
シリンジ（１００）に対して軸方向（矢印Ａ、Ｂ方向）
に移動自在に設け、前記ピストン（２３）にピストン側
係合手段（３１）を、前記ハブ（９）のハブ側係合手段
（１５）に対向する形で、前記ハブ側係合手段（１５）
に対して挿入係合自在に設けて構成した。また、本発明
のうち第３０の発明は、第２９の発明の注射器（１）に
おいて、前記第二バイパス手段は前記ハブ側係合手段
（１５）の表面（１７ａ）に沿って形成された溝（４
０）である。また、本発明のうち第３１の発明は、第２
９の発明の注射器（１）において、前記第二バイパス手
段は前記ハブ（９）に穿設された孔（４１）である。ま
た、本発明のうち第３２の発明は、第２６の発明の注射
器（１）に使用されるピストン（２３）において、前記
ピストン（２３）はピストン本体（２５）を有し、前記
ピストン本体（２５）の先端側に、前記シリンジ（１０
０）の内部（２ａ）を軸方向（矢印Ａ、Ｂ方向）に閉塞
し得るとともに、前記シリンジ（１００）の内部（２
ａ）を軸方向（矢印Ａ、Ｂ方向）に摺動移動し得る押圧
部（２９、３０、３３）を設け、前記押圧部（２９、３
０、３３）の先端側に、前記ハブ側係合手段（１５）に
対して挿入係合自在なるピストン側係合手段（３１）を
設け、前記ピストン側係合手段（３１）に、該ピストン
側係合手段（３１）が前記ハブ（９）と当接した際に、
前記連通空間（１３、１５）と前記液保持空間（５３）
を連通する第一バイパス手段（３２、３９）を形成して
構成した。また、本発明のうち第３３の発明は、第３２
の発明のピストン（２３）において、前記第一バイパス
手段は前記ピストン側係合手段（３１）の表面（３１
ｃ）に沿って形成された溝（３２）である。また、本発
明のうち第３４の発明は、第３２の発明のピストン（２
３）において、前記第一バイパス手段は前記ピストン側
係合手段（３１）に穿設された孔（３９）である。ま
た、本発明のうち第３５の発明は、ピストン（２３）が
摺動自在に装着されたシリンジ（１００）に対して挿着
される注射器用のハブ（９）において、前記ハブ（９）
は、前記シリンジ（１００）に着脱自在に挿着され得る
ハブ本体（９０）を有し、前記ハブ本体（９０）の一端
（１１ａ）に、注射針（２１）を挿入し得る針挿入部
（１２）を、前記ハブ本体（９０）の軸心方向（矢印
Ａ、Ｂ方向）に設け、前記ハブ本体（９０）に、該ハブ
本体の他端（１０ｂ）に開口部（１７ｂ）を形成する形
でハブ側係合手段（１５）を、前記針挿入部（２１）と
連通した連通空間（１３、１５）を形成する形で設け、
前記ハブ本体（９０）に、該ハブ本体（９０）が前記シ
リンジ（１００）に挿着された際に、前記シリンジ（１
００）内部の液保持空間（５３）と前記連通空間（１
３、１５）とを連通する第二バイパス手段（４０、４
１）を形成して構成した。また、本発明のうち第３６の
発明は、第３５の発明のハブ（９）において、前記第二
バイパス手段は前記ハブ側係合手段（１５）の表面（１
７ａ）に沿って形成された溝（４０）である。また、本
発明のうち第３７の発明は、第３５の発明のハブ（９）
において、前記第二バイパス手段は前記ハブ本体（９）
に穿設された孔（４１）である。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 of the present invention
Of the invention has a syringe body (2) to which a piston (23) is slidably mounted, and is formed in a tubular shape at the tip of the syringe body (2) through an injection needle introduction hole (8a). A hub (9) for a syringe, which has a hub insertion hole (4b) formed therein and is detachably inserted into the hub insertion hole (4b), wherein the hub (9) is the hub insertion hole. It has a cylindrical hub body (90) that can be inserted into the hole (4b) and pulled out from the hub insertion hole (4b) into the syringe body (2), and has an outer peripheral portion of the hub body (90). , Seal part (10
c, 57, 61) are formed in an annular shape so that they can be engaged with the inner surface of the hub insertion hole (4b), and the hub body (9
(1) of (0) is provided with a needle insertion hole (12) into which the injection needle (21) can be inserted, in the axial direction (arrow A, B direction) of the hub body (90), and the hub body ( At the other end (10b) of 90), a hub side engaging means (15) is engageable with the piston (23) and the needle insertion hole (12).
The communication space (13, 15) is formed between them. A second aspect of the present invention is the hub (9) of the first aspect, wherein the seal portion (10c) is formed in the shape of a groove. A third aspect of the present invention is the hub (9) of the first aspect, wherein the seal portion (5) is provided.
7, 61) are formed in the form of ridges. Further, a fourth aspect of the present invention relates to a syringe (100) having a syringe body (2) in which a hub insertion hole (4b) is formed at a 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 first invention is inserted into the hub insertion hole (4b). Wearing hole (4b)
And is detachably inserted into the syringe body (2) from the hub insertion hole (4b) so that the hub seal is attached to the inner peripheral surface of the hub insertion hole (4b). The parts (7a, 7d, 59) are provided in an annular shape, and the seal parts (10c, 57, 61) of the hub body (90) are brought into contact with the hub seal parts (7a, 7d, 59) at a predetermined contact pressure. (F1) is provided in the form of contact and engagement. Further, the fifth aspect of the present invention relates to a syringe (100) having a syringe body (2) in which a hub insertion hole (4b) is formed at the tip through an injection needle introduction hole (8a),
In a hub connection structure in which a syringe hub (9) is detachably connected, the hub body (90) of the hub (9) of the second invention is inserted into the hub insertion hole (4b). Four
b) and detachably inserted into the syringe body (2) from the hub insertion hole (4b) so that it can be pulled out and projected onto the inner peripheral surface of the hub insertion hole (4b). A hub seal portion (7d) having an annular shape is provided, and the seal portion (10c) of the hub body (90) contacts the hub seal portion (7d) at a predetermined contact pressure (F1). ), And is provided in the form of contact engagement. In addition, a sixth aspect of the present invention relates to a syringe (100) having a syringe body (2) having a hub insertion hole (4b) formed at its tip through an injection needle introduction hole (8a), In a hub connection structure in which a syringe hub (9) is detachably connected,
The hub body (90) of the hub of the third aspect of the invention is inserted into the hub insertion hole (4b), and the syringe body (2) is inserted through the hub insertion hole (4b). ) Is detachably inserted so that it can be pulled out, and a hub seal portion (59) having an annular groove is formed on the inner peripheral surface of the hub insertion hole (4b). Body (9
The seal portion (57) of No. 0) is provided so as to be in contact with the hub seal portion (59) at a predetermined contact pressure (F1). A seventh aspect of the present invention is the hub connection structure according to the fifth or sixth aspect of the invention, wherein the width of the seal portion (10c, 57) and the hub seal portion (7d, 5).
The widths of 9) are different. Further, the eighth invention of the present invention relates to a syringe (100) having a syringe body (2) having a hub insertion hole (4b) 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). Wearing hole (4b)
The hub insertion hole (4b) can be pulled out from the hub insertion hole (4b) into the syringe body (2) so as to be detachably inserted and attached to the inner peripheral surface (7a) of the hub insertion hole (4b). The hub seal portion (7a) is provided on the same surface, and the seal portions (57, 61) of the hub body (90) are brought into contact with the hub seal portion (7a) at a predetermined contact pressure (F1). It was constructed in a combined form. The ninth aspect of the present invention
Of the fourth aspect of the present invention, in the hub connecting structure according to the fourth aspect, the fifth aspect, the sixth aspect, or the eighth aspect, the hub body (90) is connected to the hub insertion hole (4b) from the injection needle introduction hole (8a) side. It was constructed so that it could be inserted and attached. The tenth invention of the present invention is the hub connection structure according to the fourth, fifth, sixth or eighth invention, wherein 1 is provided around the injection needle introduction hole (8a) of the syringe body (2). More than one slit (5
0) was formed. The eleventh invention of the present invention is a syringe (10) having the connection structure of the fourth invention.
0) and a hub (9), the syringe body (2)
The inside of the syringe body (2) in the axial direction (arrows A, B).
A piston (23) closed in the axial direction (arrow A, B directions) with respect to the syringe body (2), and the hub (9) is attached to the piston (23).
Piston-side engaging means (31) capable of engaging with the hub-side engaging means (15) is provided so as to face the hub-side engaging means (15), and the needle insertion hole ( 12) was provided with an injection needle (21). A twelfth aspect of the present invention has a syringe (100) and a hub (9) that form the connection structure of the fifth aspect of the present invention, wherein the syringe body (2) has the inside of the syringe body (2). The piston (23) in the axial direction (arrow A, B direction) to the syringe body (2) in the axial direction (arrow A, B direction).
And a piston side engaging means (31) capable of engaging with the hub side engaging means (15) of the hub (9), the hub side engaging means (15). ), The needle insertion hole (12) of the hub (9) is provided.
In addition, an injection needle (21) was provided. A thirteenth invention of the present invention has a syringe (100) and a hub (9) that form the connection structure of the sixth invention, and the syringe body (2) has the inside of the syringe body (2). A piston (23) that is closed in the axial direction (arrow A, B direction) is provided movably in the axial direction (arrow A, B direction) with respect to the syringe body (2), and the piston (23) And a piston side engaging means (31) capable of engaging with the hub side engaging means (15) of the hub (9), and the hub side engaging means (1).
5), the injection needle (21) 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 main body (2) has a shaft inside the syringe main body (2). Piston (2 that closes in the direction of arrow A, B)
3) is provided movably in the axial direction (directions of arrows A and B) with respect to the syringe body (2), and the piston (23) is provided.
A piston-side engaging means (31) capable of engaging with the hub-side engaging means (15) of the hub (9) is provided so as to face the hub-side engaging means (15). An injection needle (21) was provided in the needle insertion hole (12) of 9). The fifteenth invention of the present invention is the syringe (1) according to the twelfth or thirteenth invention, wherein the seal portion (10c,
57) and the hub seal portions (7d, 59) have different widths. The sixteenth aspect of the present invention
In the syringe (1) according to the eleventh, twelfth, thirteenth or fourteenth invention, the piston (23) has a piston body (25) having an operating portion (27) and a liquid pressing portion (29, 30,
It was designed to be breakable between 33). The seventeenth invention of the present invention is the syringe (1) according to the sixteenth invention, wherein the piston stopper (3) is attached to the syringe body (2).
b) to the liquid pressing portion (29, 3) of the piston (23).
0, 33) was formed so as not to come out of the syringe body (2). The eighteenth invention of the present invention is the syringe (1) of the sixteenth invention, wherein a notch (26) for breaking is formed in the piston body (25) of the piston (23). The nineteenth invention of the present invention is the syringe (1) according to the seventeenth invention, wherein
The piston body (25) of the piston (23) is provided with a notch (26) for breaking. The twentieth invention of the present invention is the syringe (1) according to the nineteenth invention, wherein the notch (26) is the piston (23).
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). The 21st invention of the present invention is the 1st invention
When assembling the syringe (1) of the first, twelfth, thirteenth, or fourteenth invention, the hub (9) is inserted into the hub insertion hole (4b) from the piston mounting side of the syringe body (2). Insert the hub (9) into the sheath of the hub (9).
Part (10c, 57, 61) and the hub insertion hole (4b)
The hub seals (7a, 7d, 59) of the above are installed so as to be elastically engaged with each other, and the syringe (100),
The piston (23) was inserted, and the injection needle (21) was inserted and connected to the needle insertion hole (12) of the hub (9).
The 22nd invention of the present invention is the 11th or 12th invention.
Alternatively, when assembling the syringe (1) of the thirteenth or fourteenth invention, the piston (23) is inserted into the syringe (100), and the hub (9) is inserted into the injection needle introducing hole of the syringe body (2). The hub (9) is inserted from the side (8a) into the hub insertion hole (4b), and the hub (9) is attached to the seal portions (10c, 57, 61) of the hub (9) and the hub insertion hole (4). 4b) and hub seals (7a, 7d, 59) are elastically engaged with each other, and the hub (9) has a needle insertion hole (1).
An injection needle (21) was inserted and connected to 2). The twenty-third invention of the present invention, when assembling the syringe (1) of the eleventh or twelfth or thirteenth or fourteenth invention,
The piston (23) is inserted into the syringe (100), and the hub (9) with the injection needle (21) attached is
The syringe main body (2) is inserted into the hub insertion hole (4b) from the injection needle introduction hole (8a) side, and the hub (9) is inserted into the seal portion (10c) of the hub (9). 57, 6
1) and the hub seal part (7a, 7b) of the hub insertion hole (4b).
7d, 59) are installed so as to be elastically engaged with each other. The twenty-fourth invention of the present invention is the first invention.
When assembling the syringe (1) of the first, twelfth, thirteenth, or fourteenth invention, one or more slits (50) are formed around the injection needle introduction hole (8a) of the syringe body (2). In addition, the piston (2
3) is inserted, and the hub (9) with the injection needle (21) 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 (8a) from the side (a), and the hub (9) is attached to the seal portions (10c, 5c) of the hub (9).
7, 61) and the hub seal portions (7a, 7d, 59) of the hub insertion hole (4b) are elastically engaged with each other. The twenty-fifth aspect of the present invention is such that when the syringe (1) of the eleventh or twelfth or thirteenth or fourteenth aspect of the invention is assembled, the syringe needle introduction hole (8a) of the syringe body (2) is One or more slits (50) around
The piston (23) is inserted into the syringe (100), and the hub (9) is inserted into the hub insertion hole (4b) from the syringe needle introduction hole (8a) side of the syringe body (2). ), The hub (9) is attached to the hub portion (7c, 57, 61) of the hub (9) and the hub sealing portions (7a, 7d, 7b) of the hub insertion hole (4b). 59) and the hub (9) so that they are elastically engaged with each other.
An injection needle (21) was inserted and connected to the needle insertion hole (12) of the above. The twenty-sixth aspect of the present invention has a cylindrical syringe (100) having a liquid holding space (53) formed inside (2a), and a hub (9) is attached to and detached from the syringe (100). The injection needle (21) is attached to the side of the hub (9) facing away from the liquid holding space (53), and the hub (9) is attached to the hub (9). The hub side engaging means (15) is formed in the form of forming an opening (17b) at the end (10b) facing the liquid holding space (53) of the syringe (100) of the injection needle (21). The syringe (100) is provided so as to form a communication space (15, 13) communicating with the flow hole (21a), and the inside (2a) of the syringe (100) is axially (arrow A, B direction).
The piston (23) closed to the syringe (1
00) so as to be movable in the axial direction (directions of arrows A and B), and the piston side engaging means (3
1) is provided so as to be inserted into and engageable with the hub side engaging means (15) so as to face the hub side engaging means (15) of the hub (9), and the piston side engaging means ( The first bypass means (31) for communicating the communication space (15, 13) with the liquid holding space (53) when the piston side engagement means (31) contacts the hub (9). 32, 39). A twenty-seventh aspect of the present invention is the syringe (1) according to the twenty-sixth aspect, wherein the first bypass means is a groove formed along the surface (31c) of the piston side engaging means (31). (32). The 28th aspect of the present invention is the syringe (1) according to the 26th aspect, wherein the first bypass means is a hole (39) formed in the piston side engagement means (31).
A twenty-ninth aspect of the present invention is the tubular syringe (10) in which the liquid holding space (53) is formed inside (2a).
0), the hub (9) is removably inserted into the syringe (100), and the injection needle (21) is provided on the side of the hub (9) that is diametrically opposed to the liquid holding space (53). And the end portion (10) of the hub (9) facing the liquid holding space (53) of the syringe (100).
The hub side engagement means (15) is formed in the form of forming an opening (17b) in b), and the liquid flow hole (21a) of the injection needle (21).
Second bypass means (40) provided so as to form a communication space (13, 15) communicating with the second bypass means (40) for communicating the liquid holding space (53) and the communication space (13, 15) with the hub (9). , 41) is formed on the syringe (100),
A piston (23) that closes the inside (2a) of the syringe (100) in the axial direction (arrows A and B directions) is attached to the syringe (100) in the axial direction (arrows A and B directions).
And a piston side engaging means (31) on the piston (23) so as to face the hub side engaging means (15) of the hub (9). )
It is configured such that it can be inserted and engaged with respect to. The thirtieth invention of the present invention is the syringe (1) according to the twenty-ninth invention, wherein the second bypass means is a groove formed along the surface (17a) of the hub side engaging means (15). (4
0). The 31st invention of the present invention is the 2nd invention.
In the syringe (1) of the ninth invention, the second bypass means is a hole (41) formed in the hub (9). The 32nd invention of the present invention is the piston (23) used in the syringe (1) of the 26th invention, wherein the piston (23) has a piston body (25), 25), the syringe (10
0) inside (2a) can be closed in the axial direction (directions of arrows A and B), and inside (2a) inside the syringe (100).
a) is provided with a pressing portion (29, 30, 33) capable of slidingly moving in the axial direction (arrow A, B direction), and the pressing portion (29, 3) is provided.
0, 33) is provided with a piston side engaging means (31) that is insertably engageable with the hub side engaging means (15), and the piston side engaging means (31) is provided with the piston. When the side engaging means (31) comes into contact with the hub (9),
The communication space (13, 15) and the liquid holding space (53)
The first bypass means (32, 39) communicating with the above is formed. The 33rd invention of the present invention is the 32nd invention.
In the piston (23) of the present invention, the first bypass means is the surface (31) of the piston side engaging means (31).
It is a groove (32) formed along c). The 34th invention of the present invention is the piston (2
In 3), the first bypass means is a hole (39) formed in the piston side engaging means (31). A thirty-fifth invention of the present invention is the hub (9) for a syringe, wherein the hub (9) is inserted into a syringe (100) in which a piston (23) is slidably mounted.
Has a hub body (90) that can be removably inserted into the syringe (100), and a needle insertion part (in which an injection needle (21) can be inserted into one end (11a) of the hub body (90). 12) is provided in the axial direction (arrow A, B direction) of the hub body (90), and an opening (17b) is formed in the hub body (90) at the other end (10b) of the hub body. Hub-side engaging means (15) in the form of forming a communication space (13, 15) communicating with the needle insertion part (21),
When the hub body (90) is inserted into the syringe (100), the syringe (1) is attached to the hub body (90).
00) internal liquid holding space (53) and the communication space (1
Second bypass means (40, 4)
1) was formed and constituted. A thirty-sixth aspect of the present invention is the hub (9) of the thirty-fifth aspect, wherein the second bypass means is the surface (1) of the hub side engaging means (15).
7a) is a groove (40) formed along the groove. The 37th invention of the present invention is the hub (9) of the 35th invention.
In the second bypass means is the hub body (9)
Is a hole (41) formed in the. The numbers in parentheses () indicate the corresponding elements in the drawings for 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１乃至第３
の発明によるハブ（９）は、シ−ル部（１０ｃ、５７、
６１）においてハブとハブ挿着穴（４ｂ）はシールされ
る。また、本発明のうち第４乃至第６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
（１０ｃ、５７、６１）との間において接触係合し、ハ
ブシ−ル部（７ｄ、５９、７ａ）とシ−ル部（１０ｃ、
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７の発明による接続構造で
は、第４乃至第６及び、第８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（７ｄ、５９）
とシ−ル部（１０ｃ、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９の発明に
よる接続構造では、第４乃至第６及び、第８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１０の発明による接続構造では、第
４乃至第６及び、第８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１１乃至第１４の発明によ
る注射器（１）は、使用中に、ハブ挿着穴（４ｂ）とハ
ブ（９）とが、ハブシ−ル部（７ｄ、５９、７ａ）とシ
−ル部（１０ｃ、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（２
３）の軸方向の操作により、該ピストン（２３）とハブ
（９）とを係合させて、ハブ（９）及び、注射針（２
１）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１５の発明による注射器
（１）は、第１１乃至第１４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（７ｄ、５
９）とシ−ル部（１０ｃ、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１６の
発明による注射器（１）は、第１１乃至第１４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（２１）の挿入格納後、ピストン
（２３）を２つに分離する。また、本発明のうち第１７
の発明による注射器（１）は、第１６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（２３）の移動が停止され
る。また、本発明のうち第１８の発明による注射器
（１）は、第１６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
（２６）に加わる。また、本発明のうち第１９の発明に
よる注射器（１）は、第１７の発明による注射器（１）
と同様に作用すると共に、切欠き（２６）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２０の発
明による注射器（１）は、第１９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）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切欠き（２６）に作用
する。また、本発明のうち第２１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２２及び第２３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（８ａ）側より挿入
装着する。また、本発明のうち第２４及び第２５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。また、本発明のうち第２６乃至第２８及び、
第３２乃至第３４の発明は、ハブ側係合手段（１５）と
ピストン側係合手段（３１）とを係合させる際、ハブ
（９）とピストン（２３）の間の液保持空間（５３）で
圧迫され昇圧した、残留した薬液などが、第一バイパス
手段（３２、３９）を介して注射針（２１）の液流通孔
（２１ａ）側に適宜流出する。また、本発明のうち第２
９乃至第３１及び、第３５乃至第３７の発明は、ハブ側
係合手段（１５）とピストン側係合手段（３１）とを係
合させる際、ハブ（９）とピストン（２３）の間の液保
持空間（５３）で圧迫され昇圧した、残留した薬液など
が、第二バイパス手段（４０、４１）を介して注射針
（２１）の液流通孔（２１ａ）側に適宜流出する。With the above structure, the first to third aspects of the present invention
The hub (9) according to the invention of the invention comprises a seal portion (10c, 57,
At 61), the hub and the hub insertion hole (4b) are sealed. In addition, 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).
Is in contact engagement between the hub seal portion (7d, 59, 7a) and the seal portion (10c, 57, 61), and the hub seal portion (7d, 59, 7a) and the seal. Department (10c,
57 and 61) is sealed by a predetermined contact pressure. In the connection structure according to the seventh aspect of the present invention, the same operation as the connection structures according to the fourth to sixth and eighth aspects is provided, and further, the hub seal portions (7d, 59).
And the seal portion (10c, 57) are point contact seals at two places. Further, in the connection structure according to the ninth aspect of the present invention, the same operation as the connection structures according to the fourth to sixth and eighth aspects is performed, and further, during hub assembly, the inside of the syringe body (2) ( Not via 2a). Further, in the connection structure according to the tenth aspect of the present invention, the syringe operates in the same manner as the connection structures according to the fourth to sixth and eighth aspects, and is further divided into slits (50) during assembly. Injection needle introduction hole (8a) of the main body (2)
The surrounding area expands in such a manner as to widen the diameter of the injection needle introduction hole (8a). In addition, in the syringe (1) according to the eleventh to fourteenth aspects of the present invention, during use, the hub insertion hole (4b) and the hub (9) have a hub seal portion (7d, 59, 7a). And the seal portions (10c, 57, 61) are in contact with each other while maintaining the seal state, and after use, the piston (2
By the axial operation of 3), the piston (23) and the hub (9) are engaged, and the hub (9) and the injection needle (2)
1) is inserted and stored in the inside (2a) of the syringe body (2). The syringe (1) according to the fifteenth invention of the present invention is the syringe (1) according to the eleventh to fourteenth inventions.
And the hub seal (7d, 5)
Between point 9) and the seal portion (10c, 57) is a point-contact seal at two points. The syringe (1) according to the sixteenth aspect of the present invention operates in the same manner as the syringe (1) according to the eleventh to fourteenth aspects, and further has a hub (9) and a needle (21) inserted therein. After storage, the piston (23) is separated into two. The seventeenth aspect of the present invention
The syringe (1) according to the present invention functions similarly to the syringe (1) according to the sixteenth invention, and the movement of the piston (23) is stopped by the piston stopper (3b). Further, the syringe (1) according to the eighteenth aspect of the present invention acts in the same manner as the syringe (1) according to the sixteenth aspect, and bending stress during breaking is applied to the notch (26). The syringe (1) according to the nineteenth aspect of the present invention is the syringe (1) according to the seventeenth aspect.
The notch (26) is subjected to bending stress at the time of breaking as well as the above. The syringe (1) according to the twentieth invention of the present invention operates in the same manner as the syringe (1) according to the nineteenth invention, and further has a piston stopper (3b) and an end (3a) of the syringe body (2). ) Serves as a fulcrum, and bending stress at the time of breaking acts on the notch (26). 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. In addition, in the assembling method according to the twenty-second and twenty-third aspects of the present invention, the hub (9) is inserted and mounted from the side of the injection needle introduction hole (8a) without passing through the inside (2a) of the syringe body (2). To do. Further, in the assembling method according to the twenty-fourth and twenty-fifth aspects of the present invention, the hub (9) is inserted and mounted not through the inside (2a) of the syringe body (2) but on the side of the injection needle introduction hole (8a). In addition to the above, the circumference of the injection needle introducing hole (8a) of the syringe body (2) divided by the slit (50) is expanded by expanding the diameter of the injection needle introducing hole (8a). The twenty-sixth to twenty-eighth aspects of the present invention and
In the thirty-second to thirty-fourth aspects, when the hub-side engaging means (15) and the piston-side engaging means (31) are engaged with each other, the liquid holding space (53) between the hub (9) and the piston (23). ) The residual drug solution or the like, which has been compressed and pressurized by), appropriately flows out to the liquid flow hole (21a) side of the injection needle (21) via the first bypass means (32, 39). The second aspect of the present invention
In the ninth to thirty-first and thirty-fifth to thirty-seventh inventions, when the hub side engaging means (15) and the piston side engaging means (31) are engaged with each other, the hub (9) and the piston (23) are separated from each other. The residual drug solution or the like, which has been compressed and increased in pressure in the liquid holding space (53), appropriately flows out to the liquid flow hole (21a) side of the injection needle (21) through the second bypass means (40, 41).
【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に示す注射器の全体図、図３
は、図１に示す注射器のハブ係合部の挿入部を図中の矢
印Ｂ方向に見た図、図４は、図１に示す注射器のハブ挿
着部を図中の矢印Ｂ方向に見た図、図５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
６は、本発明による注射器のうち、ハブ側にシールリブ
が形成され、ハブ挿入孔側にシール溝が形成された注射
器の一例を示した模式断面図、図７は、本発明による注
射器のうち、ハブ側にシールリブが形成され、ハブ挿入
孔側のハブシール部がハブ挿入孔の内周面に一致する形
の注射器の一例を示した模式断面図、図８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
入孔側のハブシール部がハブ挿入孔の内周面に一致する
形の注射器の一例を示した模式断面図、図９は、本発明
による注射器のうち、第一バイパス手段がバイパス孔で
ある形の注射器の一例を示した模式断面図、図１０は、
本発明による注射器のうち、第二バイパス手段がハブバ
イパス溝である形の注射器の一例を示した模式断面図、
図１１は、本発明による注射器のうち、第二バイパス手
段がハブバイパス孔である形の注射器の一例を示した模
式断面図である。1 is a schematic sectional view showing an example of a syringe according to the present invention, FIG. 2 is an overall view of the syringe shown in FIG. 1, and FIG.
4 is a view of the insertion portion of the hub engaging portion of the syringe shown in FIG. 1 viewed in the direction of arrow B in the drawing, and FIG. 4 is a view of the hub insertion portion of the syringe shown in FIG. 1 viewed in the direction of arrow B in the drawing. FIGS. 5 and 5 are views in which the piston is broken in the syringe shown in FIG. 1, and FIG. 6 is a syringe according to 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. FIG. 7 is a schematic cross-sectional view showing an example of the formed syringe, and in the syringe according to the present invention, a seal rib is formed on the hub side, and the hub seal portion on the hub insertion hole side is aligned with the inner peripheral surface of the hub insertion hole. FIG. 8 is a schematic cross-sectional view showing an example of a syringe-shaped injector. In the injector according to the present invention, a fold portion is formed on the hub side, and the hub seal portion on the hub insertion hole side is aligned with the inner peripheral surface of the hub insertion hole. FIG. 9 is a schematic cross-sectional view showing an example of a syringe of the shape of FIG. , Schematic cross-sectional view first bypass means showing an example of a syringe form a bypass hole, FIG. 10,
Of the syringe according to the present invention, a schematic cross-sectional view showing an example of a syringe in which the second bypass means is a hub bypass groove,
FIG. 11 is a schematic cross-sectional view showing an example of the syringe of the present invention in which the second bypass means is a hub bypass hole.
【０００７】本発明による注射器１は、図２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
２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２３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２の紙面左方向）及び、矢印Ｂ方
向（図２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２の紙面右側）の開口
端部３ａ付近において、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、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２の紙面左
側）には、内部が矢印Ａ方向に向かって収斂した漏斗形
状のテーパ部６が、該主円筒部３に一体的に連続する形
で形成されている。なお、主円筒部３の内部と、テーパ
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２
ａ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 main body 2 (note that FIG. 2 is a schematic cross-sectional view of the syringe 1, but for convenience, a part of a piston 23 described later does not show a cross-section but a side surface). . 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. 2) and the direction of the arrow B (the right direction on the paper surface of FIG. 2). ). On the outer peripheral side of the main cylindrical portion 3, a syringe support portion 5 is provided in the vicinity of the opening end 3a of the main cylindrical portion 3 on the arrow B side (the right side in the drawing of FIG. 2).
Is provided in a brim shape on the inner peripheral surface 3c side of the main cylindrical portion 3, in the vicinity of the opening end 3a, in the direction toward the axis P1 of the main cylindrical portion 3, that is, in the direction of arrow D in the figure. A locking rib 3b protruding in the shape of a ring is formed in an annular shape along the inner peripheral surface 3c. On the arrow A side of the main cylindrical portion 3 (on the left side of the paper surface of FIG. 2), a funnel-shaped tapered portion 6 whose interior converges in the direction of the arrow A is integrally formed with the main cylindrical portion 3. Has been done. The interior of the main cylindrical portion 3 and the interior of the taper portion 6 communicate with each other in the directions of arrows A and B, and the space obtained by combining these interiors is the internal space 2 of the syringe body 2.
a.
【０００８】テーパ部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、該テーパ部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は小円筒部７を有している。小
円筒部７は前記テーパ部６に一体的に連続する形で形成
されていると共に、主円筒部３と同心状に形成されてお
り、小円筒部７の内径は、前記主円筒部３の内径よりも
小さく形成されている。小円筒部７の内側は、ハブ挿着
孔４ｂとなっており、ハブ挿着孔４ｂには、前記軸心Ｐ
１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は円環状に小円筒部７の平滑な内周
面７ａに沿って形成されており、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１において
示される断面）は円弧状になっている。一方、小円筒部
７の外周面７ｆ側には、補強用リブ７ｃ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。また、小円筒部７には、図１及び、図４
に示すように、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断面の孔８
ａが、前記軸心Ｐ１を中心にして設けられており、孔８
ａの矢印Ａ側は、矢印Ａ方向に断面内径が拡大するテー
パ状に形成されている。更に、端壁８及び、小円筒部７
に亙って、図１及び、図４に示すように、３本のスリッ
ト５０が形成されている。スリット５０は、端壁８にお
いては、軸心Ｐ１に対して放射方向即ち、図４の矢印
Ｃ、Ｄ方向（但し、矢印Ｃ方向は矢印Ｄ方向の反対方
向）に伸延した形で、かつ端壁８に設けられた孔８ａに
連絡された形で形成されており、小円筒部７において
は、矢印Ａ、Ｂ方向に平行な形で形成されている。な
お、スリット５０は、前記ハブ止リブ７ｄ及び、前記補
強用リブ７ｃ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７ｃに到達しない形で形成さ
れている。ハブ挿着部４は、以上のように構成されてお
り、シリンジ１００は、注射器支持部５及び、シリンジ
本体２を構成する主円筒部３、テーパ部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 distal end side of the syringe main body 2, as shown in FIGS. 1 and 2, a hub insertion portion 4 is integrally continuous with the taper portion 6. The hub insertion portion 4 has a small cylindrical portion 7. The small cylindrical portion 7 is formed integrally with the taper portion 6 and is concentric with the main cylindrical portion 3, and the inner diameter of the small cylindrical portion 7 is the same as that of the main cylindrical portion 3. It is formed smaller than the inner diameter. The inner side of the small cylindrical portion 7 is a hub insertion hole 4b, and the hub insertion hole 4b has the axis P
A hub stop rib 7d that projects toward 1 is formed. The hub stop rib 7d is formed in an annular shape along the smooth inner peripheral surface 7a of the small cylindrical portion 7, and the cross section of the hub stop rib 7d by the plane including the axis P1 (that is, shown in FIG. 1). The cross section) has an arc shape. On the other hand, a reinforcing rib 7c is provided on the outer peripheral surface 7f side of the small cylinder portion 7
It is annularly provided at a position corresponding to the hub stop rib 7d. Further, the small cylindrical portion 7 has a structure shown in FIGS.
As shown in FIG. 3, a disc-shaped end wall 8 having an outer diameter equal to the outer diameter of the small cylindrical portion 7 is provided.
Is provided integrally with the small cylindrical portion 7 such that the wall surface 8b of the end wall 8 on the arrow B side and the end portion 7b of the small cylindrical portion 7 on the arrow A side are in contact with each other. The end wall 8 has a circular cross-section hole 8 that penetrates both the front and back wall surfaces of the end wall 8 in the directions of arrows A and B.
a is provided around the axis P1 and the hole 8
The arrow A side of a is formed in a taper shape whose cross-sectional inner diameter increases in the direction of arrow A. Furthermore, the end wall 8 and the small cylindrical portion 7
As shown in FIGS. 1 and 4, three slits 50 are formed. In the end wall 8, the slit 50 extends in the radial direction with respect to the axis P1, that is, in the directions of arrows C and D in FIG. It is formed so as to communicate with a hole 8a provided in the wall 8, and in the small cylindrical portion 7, it is formed in a shape parallel to the directions of arrows A and B. The slit 50 is formed at a position on the arrow A side of the hub stop rib 7d and the reinforcing rib 7c so as not to reach the hub stop rib 7d and the reinforcing rib 7c. The hub insertion portion 4 is configured as described above, and in the syringe 100, the syringe support portion 5, the main cylindrical portion 3 forming the syringe body 2, the taper portion 6, and the hub insertion portion 4 are integrally molded. It is configured in a form.
【０００９】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。ハブ９は、図１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。また、主円柱部１０
の平滑な外周面１０ｆ側にはハブ止溝１０ｃが形成され
ており、ハブ止溝１０ｃ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。主円柱部１０の矢印Ａ側
の端面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
に設けられている。ハブ９は、図１に示すように、該ハ
ブ９の主円柱部１０をハブ挿着部４のハブ挿着孔４ｂ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いる。また、ハブ挿着部４
のハブ止リブ７ｄとハブ９のハブ止溝１０ｃとは、互い
に対応整合した位置に存在しており、従って、ハブ止リ
ブ７ｄは、その矢印Ｄ側の円弧状の先端側を、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１０ｃ
に挿入させる形でハブ止溝１０ｃに係合している。な
お、ハブ止リブ７ｄの矢印Ａ、Ｂ方向の幅はハブ止溝１
０ｃの矢印Ａ、Ｂ方向の幅よりも広いので、ハブ止リブ
７ｄは、その円弧状の先端の矢印Ａ側及び、矢印Ｂ側の
シール部７ｅ、７ｅにおいて、ハブ止溝１０ｃの矢印
Ａ、Ｂ両側の開口端部１０ｅ、１０ｅと当接する形でハ
ブ止溝１０ｃに係合している。なお、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１
０ｆと接触しておらず、内周面７ａと外周面１０ｆとの
間には隙間空間４９が形成されている（但し、後述する
ハブ挿着部４へのハブ９の挿着及び、後述するハブ挿着
部４からのハブ９の引き抜きが容易に行われるならば、
小円筒部７の内周面７ａのうちハブ止リブ７ｄ以外の箇
所とハブ９の外周面１０ｆとが接触していてもよ
い。）。また、ハブ９の主円柱部１０の矢印Ｂ側の端面
１０ｂは、ハブ挿着孔４ｂと前記内部空間２ａとの境界
（即ち、小円筒部７の内部とテーパ部６の内部との境
界）よりも矢印Ａ側に位置しており、ハブ挿入孔４ｂの
内部のうち該端面１０ｂより矢印Ｂ側の空間は孔内空間
４ａとなっている。The hub insertion hole 4b of the hub insertion portion 4 is provided with a hub 9 made of resin and harder than the syringe 100. As shown in FIG. 1, the hub 9 has a hub body 90.
The hub main body 90 is provided with a columnar main columnar portion 10 whose longitudinal direction is parallel to the directions of the arrows A and B and whose axis is the axis P1. In addition, the main cylindrical portion 10
A hub stop groove 10c is formed on the smooth outer peripheral surface 10f side, and the hub stop groove 10c is formed in an annular shape along the outer peripheral side of the main cylindrical portion 10. On the side of the end surface 10a on the arrow A side of the main cylindrical portion 10, a small cylindrical portion 11 extending in the directions of arrows A and B is provided concentrically with the main cylindrical portion 10 and integrally with the main cylindrical portion 10. In the hub 9, as shown in FIG. 1, the main columnar portion 10 of the hub 9 is inserted into the hub insertion hole 4b of the hub insertion portion 4, and the small columnar portion 11 of the hub 9 is inserted into the hole 8a of the end wall 8. It is provided in the form of being inserted through. In addition, the hub insertion portion 4
The hub stop rib 7d and the hub stop groove 10c of the hub 9 are present at positions corresponding to each other. Therefore, the hub stop rib 7d has the arcuate tip side on the arrow D side of the hub stop rib 7d. Hub stop groove 10c existing at a position corresponding to the rib 7d
It is engaged with the hub stop groove 10c by being inserted into. The width of the hub stop rib 7d in the directions of arrows A and B is the same as the hub stop groove 1
0c is wider than the width in the direction of arrows A and B, so that the hub stop rib 7d has the arcuate tip end at the arrow A side and at the seal parts 7e and 7e on the arrow B side at the hub stop groove 10c. It engages with the hub stop groove 10c so as to abut the open ends 10e and 10e on both sides of B. The inner peripheral surface 7a of the small cylindrical portion 7 is the outer peripheral surface 1 of the hub 9 except for the hub stop rib 7d.
0f is not in contact, and a gap space 49 is formed between the inner peripheral surface 7a and the outer peripheral surface 10f (however, the hub 9 is inserted into the hub insertion portion 4 which will be described later and is described later). If the hub 9 can be easily pulled out from the hub insertion portion 4,
A portion of the inner peripheral surface 7a of the small cylindrical portion 7 other than the hub stop rib 7d may be in contact with the outer peripheral surface 10f of the hub 9. ). Further, the end surface 10b of the main cylindrical portion 10 of the hub 9 on the arrow B side is a boundary between the hub insertion hole 4b and the internal space 2a (that is, a boundary between the inside of the small cylindrical portion 7 and the inside of the tapered portion 6). Is located closer to the arrow A side than that, and a space inside the hub insertion hole 4b on the arrow B side from the end surface 10b is an inner space 4a.
【００１０】一方、ハブ挿着部４は、そのハブ挿入孔４
ｂにハブ９が設けられた状態において、小円筒部７が矢
印Ｃ方向に膨張した形で弾性変形している。つまり、小
円筒部７の弾性変形による復元力が、小円筒部７のハブ
止リブ７ｄを介してハブ９に伝達されている。即ち、ハ
ブ止リブ７ｄとハブ９との間では、これら両者の接触箇
所であるシール部７ｅとハブ止溝１０ｃの開口端部１０
ｅとの間において、前記復元力による所定のシール圧Ｆ
１が互いに作用しあっており、これらシール部７ｅと開
口端部１０ｅとの間は水密或いは、気密状態になってい
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７ｃ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、小円筒部７の弾性変形に
よる前記所定の復元力が効率よく得られるようになって
いる（なお、この補強リブ７ｃは、無くてもよいことは
勿論である）。On the other hand, the hub insertion portion 4 has the hub insertion hole 4
In the state where the hub 9 is provided in b, the small cylindrical portion 7 is elastically deformed in the form of being expanded in the arrow C direction. That is, the restoring force due to the elastic deformation of the small cylindrical portion 7 is transmitted to the hub 9 via the hub stop rib 7d of the small cylindrical portion 7. That is, between the hub stop rib 7d and the hub 9, the seal end 7e, which is the contact point between the two, and the opening end 10 of the hub stop groove 10c.
a predetermined seal pressure F due to the restoring force between
1 interacts with each other, and the seal portion 7e and the opening end portion 10e are watertight or airtight. In the small cylindrical portion 7, the hub stopping rib 7d and the hub stopping rib 7d are provided by the reinforcing rib 7c that is provided at a position corresponding to the hub stopping rib 7d by sandwiching the small cylindrical portion 7.
The rigidity in the vicinity is increased so that the predetermined restoring force due to the elastic deformation of the small cylindrical portion 7 can be efficiently obtained (note that the reinforcing rib 7c may be omitted). ).
【００１１】また、ハブ９には、図１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、ハブ９
のうち小円柱部１１の矢印Ａ側の端面１１ａに前記軸心
Ｐ１を中心とした円形の開口部１２ａを形成すると共
に、該端面１１ａより矢印Ｂ方向に伸延する形で設けら
れている。また、針挿入孔１２の矢印Ｂ側の端部１２ｂ
は、前記主円柱部１０内部に達しており、該端部１２ｂ
は、主円柱部１０による壁面１０ｄに接している。な
お、針挿入孔１２の途中には、針挿入孔１２の径が矢印
Ｂ方向に向かって収斂したテーパ部が適宜形成されてい
る。一方、ハブ９の主円柱部１０には、前記針挿入孔１
２の矢印Ｂ側に隣接する形で、流通孔１３が設けられて
おり、流通孔１３は、前記軸心Ｐ１を中心とし、針挿入
孔１２の端部１２ｂで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１３は、主円柱部１０の前
記壁面１０ｄに円形の開口部を形成する形で、前記針挿
入孔１２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１３の矢印Ｂ側に連通隣接
する形で、軸心Ｐ１に垂直な断面が円形のピストン係合
孔１５が軸心Ｐ１と同心状に設けられており、ピストン
係合孔１５の矢印Ｂ側は主円柱部１０の端面１０ｂにお
いて外部に開口する開口部１７ｂを形成している。ピス
トン係合孔１５は２つの部分即ち、矢印Ａ側の係合保持
部１６と矢印Ｂ側の導入部１７からなっており、係合保
持部１６は軸心Ｐ１と同心状の略円柱形状で、その矢印
Ａ側及び、矢印Ｂ側の両端部側はそれぞれ径が矢印Ａ方
向及び、矢印Ｂ方向に向かってそれぞれ収斂するテーパ
形状になっている。また、係合保持部１６の矢印Ａ側の
端部側は、前記流通孔１３によって連通隣接されてい
る。係合保持部１６の矢印Ｂ側の端部には、導入部１７
が連通隣接しており、導入部１７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、係
合保持部１６に面した壁面１６ａと、導入部１７に面し
た壁面１７ａとによって挾まれた部分は、係合保持部１
６と導入部１７との境界部１９を頂点とした形で軸心Ｐ
１に向かって突出した突出部２０を形成している。Further, as shown in FIG. 1, the hub 9 is provided with a needle insertion hole 12, and the needle insertion hole 12 is provided in the hub 9.
A circular opening 12a centering on the axis P1 is formed on the end surface 11a of the small cylindrical portion 11 on the arrow A side, and is provided so as to extend from the end surface 11a in the arrow B direction. In addition, the end portion 12b of the needle insertion hole 12 on the arrow B side
Has reached the inside of the main cylindrical portion 10, and the end portion 12b
Is in contact with the wall surface 10d formed by the main cylindrical portion 10. In addition, a tapered portion where the diameter of the needle insertion hole 12 converges in the direction of the arrow B is appropriately formed in the middle of the needle insertion hole 12. On the other hand, in the main cylindrical portion 10 of the hub 9, the needle insertion hole 1
A circulation hole 13 is provided adjacent to the arrow B side of 2, and the circulation hole 13 is a circle having a diameter smaller than the diameter at the end 12b of the needle insertion hole 12 about the axis P1. It is provided in a columnar shape. The flow hole 13 is provided in communication with the needle insertion hole 12 in the form of forming a circular opening on the wall surface 10d of the main columnar portion 10. Further, in the main cylindrical portion 10 of the hub 9, a piston engaging hole 15 having a circular cross section perpendicular to the axis P1 and concentric with the axis P1 is formed so as to communicate with and adjoin to the arrow B side of the flow hole 13. The piston engagement hole 15 is provided with an opening 17b that is open to the outside on the end surface 10b of the main cylindrical portion 10 on the arrow B side. The piston engagement hole 15 is composed of two parts, that is, an engagement holding portion 16 on the arrow A side and an introduction portion 17 on the arrow B side. The both ends of the arrow A side and the arrow B side are tapered so that the diameters thereof converge toward the arrow A direction and the arrow B direction, respectively. Further, the end portion side of the engagement holding portion 16 on the arrow A side is communicated and adjoined by the circulation hole 13. At the end portion of the engagement holding portion 16 on the arrow B side, the introduction portion 17 is provided.
Are adjacent to each other in communication with each other, and the diameter of the introduction portion 17 increases in the direction of arrow B. Therefore, in the main columnar portion 10, the portion sandwiched by the wall surface 16a facing the engagement holding portion 16 and the wall surface 17a facing the introduction portion 17 is the engagement holding portion 1
6 with the boundary 19 between 6 and the introduction portion 17 as the apex
A protruding portion 20 protruding toward 1 is formed.
【００１２】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２１が挿入されていおり、
注射針２１は、先端側がシリンジ本体２の外部側に位置
し、後端部側より針挿入孔１２に挿入されている。ま
た、注射針２１の後端は、針挿入孔１２の矢印Ｂ側に形
成された前記壁面１０ｄに当接しており、注射針２１の
先端から後端側に貫通されて設けられた媒体流通孔２１
ａと前記流通孔１３とは互いに矢印Ａ、Ｂ方向に連通隣
接している。また、針挿入孔１２には、注射針２１とハ
ブ９との間を充填する形で接着剤２２が注入され固結さ
れている。On the other hand, an injection needle 21 is inserted into the needle insertion hole 12 of the hub 9 as shown in FIGS.
The tip of the injection needle 21 is located outside the syringe body 2 and is inserted into the needle insertion hole 12 from the rear end. Further, the rear end of the injection needle 21 is in contact with the wall surface 10d formed on the arrow B side of the needle insertion hole 12, and is a medium circulation hole penetrating from the tip of the injection needle 21 to the rear end side. 21
The "a" and the flow hole 13 communicate with and adjoin to each other in the directions of arrows A and B. An adhesive 22 is injected into the needle insertion hole 12 so as to fill the space between the injection needle 21 and the hub 9 and is solidified.
【００１３】注射器１には、図１及び、図２に示すよう
に、ピストン２３が設けられている（なお、図２は、注
射器１の模式断面図であるが、ピストン２３のうち、後
述するピストン本体２５、外押圧板２７、内押圧板２
９、パッキン支持部３０、ハブ係合部３１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２
３は、矢印Ａ、Ｂ方向に伸延した棒状のピストン本体２
５を有しており、ピストン本体２５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２５ａ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２５ａ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２５は、該ピストン本体２５
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２５の各
平板部２５ａには、矢印Ａ側寄りにおいて、各平板部２
５ａの両側部よりピストン本体２５の軸心（即ち、軸心
Ｐ１）方向に楔形の切欠き２６が設けられている。４ヵ
所の切欠き２６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２５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２７がピストン本体２５と一体的に
設けられている。ピストン本体２５の矢印Ａ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内押圧
板２９がピストン本体２５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２９は主円筒部３の内
部に位置しており）、内押圧板２９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２
９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２９には、図２に示すよ
うに、その矢印Ａ側にパッキン支持部３０が設けられて
おり、パッキン支持部３０には、矢印Ａ、Ｂ方向に伸延
した円柱状の円柱部３０ａが、内押圧板２９と同心状に
設けられている。円柱部３０ａの径は、内押圧板２９の
径よりも小さくなっており、円柱部３０ａは、内押圧板
２９の矢印Ａ側に、内押圧板２９と一体的に設けられて
いる。円柱部３０ａの矢印Ａ側には、図１及び、図２に
示すように、円柱部３０ａと同心状に矢印Ａ、Ｂ方向に
伸延し、かつ前記小円筒部７の内径に略等しい外径をも
つ円柱状の挿入円柱部３０ｂが、円柱部３０ａと一体的
に設けられている。更に、挿入円柱部３０ｂの矢印Ａ側
にはハブ係合部３１が設けられており、ハブ係合部３１
には、図１及び、図３に示すように、矢印Ａ、Ｂ方向に
伸延した円柱状の円柱部３１ａが、挿入円柱部３０ｂと
同心状に設けられている。円柱部３１ａの径は、挿入円
柱部３０ｂの径よりも小さくなっており、円柱部３１ａ
は、挿入円柱部３０ｂの矢印Ａ側に、挿入円柱部３０ｂ
と一体的に設けられている。円柱部３１ａの矢印Ａ側に
は径が円柱部３１ａより大きな半球状の挿入部３１ｂ
が、球面３１ｃ側を矢印Ａ側に向ける形で円柱部３１ａ
と一体的に設けられており、挿入部３１ｂにはその矢印
Ａ側先端部から矢印Ｂ側に向かって、球面３１ｃに沿っ
た形の複数の筋状の溝３２が設けられている。なお、円
柱部３１ａの径は、前記ハブ９に設けられたピストン係
合孔１５の境界部１９における内径に略等しくなってお
り、従って、挿入部３１ｂの径は、境界部１９の径より
も大きくなっている。また、挿入部３１ｂは、前記ピス
トン係合孔１５の係合保持部１６に充分挿入保持され得
る大きさになっている。The syringe 1 is provided with a piston 23 as shown in FIGS. 1 and 2 (note that FIG. 2 is a schematic cross-sectional view of the syringe 1, but the piston 23 will be described later). Piston body 25, outer pressing plate 27, inner pressing plate 2
Regarding 9, the packing support portion 30, and the hub engagement portion 31,
For convenience, the side surface is shown instead of the cross section. ). Piston 2
3 is a rod-shaped piston body 2 extending in the directions of arrows A and B
5, the piston body 25 is provided with two congruent flat plate portions 25a in the shape of a rectangular plate, which are elongated in the directions of arrows A and B, integrally intersecting each other in a cross-shaped cross section. ing. The width of the plate surface of the flat plate portion 25a 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 25 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. Each flat plate portion 25a of the piston main body 25 is provided with a flat plate portion 2a near the arrow A side.
A wedge-shaped notch 26 is provided in the direction of the axis (that is, the axis P1) of the piston body 25 from both sides of 5a. The four notches 26 are provided at positions aligned with each other in the directions of arrows A and B. A circular plate-shaped outer pressing plate 27 having a plate surface perpendicular to the directions of arrows A and B is integrally provided with the piston body 25 on the end portion side of the piston body 25 on the arrow B side. A circular plate-shaped inner pressing plate 29 having a plate surface perpendicular to the directions of arrows A and B is provided integrally and concentrically with the piston body 25 on the end portion side of the piston body 25 on the arrow A side. (Thus, the inner pressing plate 29 is located inside the main cylindrical portion 3), and the diameter of the inner pressing plate 29 is substantially equal to the inner diameter of the main cylindrical portion 3 (thus, the inner pressing plate 2).
The diameter of 9 is larger than the inner diameter of the locking rib 3b of the main cylindrical portion 3. ). As shown in FIG. 2, the inner pressing plate 29 is provided with a packing support portion 30 on the arrow A side thereof, and the packing support portion 30 has a cylindrical columnar portion 30a extending in the directions A and B. Are provided concentrically with the inner pressing plate 29. The diameter of the columnar portion 30a is smaller than the diameter of the inner pressing plate 29, and the columnar portion 30a is provided integrally with the inner pressing plate 29 on the arrow A side of the inner pressing plate 29. On the arrow A side of the columnar portion 30a, as shown in FIGS. 1 and 2, an outer diameter that extends concentrically with the columnar portion 30a in the directions of arrows A and B and that is substantially equal to the inner diameter of the small cylindrical portion 7 is provided. A columnar insertion columnar portion 30b having a is formed integrally with the columnar portion 30a. Further, a hub engaging portion 31 is provided on the insertion column portion 30b on the arrow A side.
As shown in FIGS. 1 and 3, a columnar columnar portion 31a extending in the directions of arrows A and B is provided concentrically with the insertion columnar portion 30b. The diameter of the columnar portion 31a is smaller than the diameter of the inserted columnar portion 30b.
On the arrow A side of the insertion columnar portion 30b,
It is provided integrally with. On the arrow A side of the cylindrical portion 31a, a hemispherical insertion portion 31b having a diameter larger than that of the cylindrical portion 31a.
However, the cylindrical portion 31a is formed so that the spherical surface 31c side faces the arrow A side.
The insertion portion 31b is provided with a plurality of streak-shaped grooves 32 along the spherical surface 31c from the arrow A side tip portion toward the arrow B side. The diameter of the cylindrical portion 31a is substantially equal to the inner diameter of the boundary 19 of the piston engagement hole 15 provided in the hub 9, and therefore the diameter of the insertion portion 31b is larger than the diameter of the boundary 19. It is getting bigger. The insertion portion 31b is sized to be sufficiently inserted and held in the engagement holding portion 16 of the piston engagement hole 15.
【００１４】一方、パッキン支持部３０には、図２に示
すように、可撓性のある樹脂からなるパッキン３３が支
持されて設けられている。パッキン３３は、シリンジ１
００の主円筒部３の内部に整合して挿入されたパッキン
本体３５を有しており、パッキン本体３５には、該パッ
キン本体３５を矢印Ａ、Ｂ方向に貫通する形の係合孔３
５ａが設けられている。また、係合孔３５ａには、パッ
キン支持部３０の円柱部３０ａ及び、挿入円柱部３０ｂ
の一部が貫通した状態になっている。つまり、パッキン
３３は、係合孔３５ａにパッキン支持部３０を貫通させ
る形で該パッキン支持部３０と係合しており、係合によ
って該パッキン支持部３０に支持されて設けられてい
る。なお、係合孔３５ａにおけるパッキン３３とパッキ
ン支持部３０との間は密着状態即ち、水封気封状態にな
っている。また、パッキン本体３５の矢印Ｂ側の端部
は、内押圧板２９により矢印Ａ方向の力を受けやすいよ
うに、該内押圧板２９に当接している。また、パッキン
本体３５の矢印Ａ側は、前記シリンジ本体２のテーパ部
６の内部に自然状態で整合して挿入し得る形状即ち、外
径が矢印Ａ方向に向かって縮小するテーパ状に形成され
たテーパ部３５ｂとなっている。なお、係合孔３５ａを
貫通した状態のパッキン支持部３０の挿入円柱部３０ｂ
の矢印Ａ側の一部分は、テーパ部３５ｂよりも更に矢印
Ａ側に突出している。なお、パッキン３３のテーパ部３
５ｂが前記シリンジ本体２のテーパ部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１に示すよう
に、該パッキン３３を係合しているパッキン支持部３０
の挿入円柱部３０ｂがシリンジ本体２のハブ挿入孔４ｂ
に挿入した状態になり、ハブ係合部３１の挿入部３１ｂ
の球面３１ｃが、前記ピストン係合孔１５の導入部１７
に面した壁面１７ａに接した状態になるように、パッキ
ン支持部３０及び、パッキン３３の形状が設定されてい
る。また、パッキン３３のパッキン本体３５の外径は、
前記内押圧板２９と略同径になっているが、パッキン本
体３５の外周側には、該パッキン本体３５の外周に沿っ
た形の円環状のヒダ３５ｃ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３３は、パッ
キン本体３５のうちヒダ３５ｃ付近が軸心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に挿入されている。つま
り、パッキン３３と主円筒部３とは、ヒダ３５ｃと内周
面３ｃとにおいて密着した状態になっており、パッキン
３３と主円筒部３との間は水封気封にシールされてい
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３３が挿着
されたピストン２３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。On the other hand, as shown in FIG. 2, a packing 33 made of a flexible resin is supported and provided on the packing supporting portion 30. The packing 33 is a syringe 1
00 has a packing main body 35 that is aligned and inserted into the main cylindrical portion 3 of 00, and the packing main body 35 has an engagement hole 3 that penetrates the packing main body 35 in the directions of arrows A and B.
5a is provided. Further, in the engagement hole 35a, the columnar portion 30a of the packing support portion 30 and the insertion columnar portion 30b.
Is partially penetrated. That is, the packing 33 is engaged with the packing support portion 30 in a manner of penetrating the packing support portion 30 into the engagement hole 35a, and is provided by being supported by the packing support portion 30 by the engagement. The packing 33 in the engagement hole 35a and the packing support portion 30 are in a close contact state, that is, in a water-sealed state. The end portion of the packing body 35 on the arrow B side is in contact with the inner pressing plate 29 so that the inner pressing plate 29 can easily receive the force in the arrow A direction. The side of the packing body 35, which is indicated by the arrow A, is formed into a shape that allows the packing body 35 to be inserted into the tapered portion 6 of the syringe body 2 in a natural state, that is, the outer diameter thereof is tapered toward the direction of the arrow A. It is a tapered portion 35b. In addition, the insertion columnar portion 30b of the packing support portion 30 in a state of penetrating the engagement hole 35a.
A part of the arrow A side of is further projected to the arrow A side than the tapered portion 35b. The taper portion 3 of the packing 33
In a state in which 5b is naturally aligned and inserted into the tapered portion 6 of the syringe body 2, as shown in FIG. 1, the packing support portion 30 that engages the packing 33.
Of the insertion cylinder portion 30b is the hub insertion hole 4b of the syringe body 2.
The hub engaging portion 31 and the insertion portion 31b of the hub engaging portion 31.
The spherical surface 31c of the introduction portion 17 of the piston engagement hole 15
The shapes of the packing support portion 30 and the packing 33 are set so as to be in contact with the wall surface 17a facing the. The outer diameter of the packing body 35 of the packing 33 is
The inner pressing plate 29 has substantially the same diameter as the inner pressing plate 29, but on the outer peripheral side of the packing main body 35, annular folds 35c shaped along the outer circumference of the packing main body 35 are arranged in the directions of arrows A and B. It is double formed. Therefore, the packing 33 is inserted into the main cylindrical portion 3 of the syringe body 2 in such a manner that the vicinity of the fold 35c of the packing body 35 is contracted by elastic deformation in the direction toward the axis P1, that is, the direction of arrow D. That is, the packing 33 and the main cylindrical portion 3 are in close contact with each other at the folds 35c and the inner peripheral surface 3c, and the packing 33 and the main cylindrical portion 3 are sealed with a water seal. In addition, the inner peripheral surface 3c of the main cylindrical portion 3 of the syringe body 2 is formed smoothly, so that the piston 23 with the packing 33 inserted therein is in the internal space 2a of the main cylindrical portion 3 in the directions of arrows A and B. It can slide freely.
【００１５】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２１、ピストン２３、パッキン３３を準備し
て、まず初めに、ピストン２３にパッキン３３を挿着す
る。即ち、ピストン２３のハブ係合部３１のうち挿入部
３１ｂを、パッキン３３の係合孔３５ａの図中矢印Ｂ側
の開口端部に整合して、そのままパッキン３３に対して
ピストン２３を矢印Ａ方向に押圧する形で、パッキン３
３の可撓性を利用して該係合部３１より、ピストン２３
のパッキン支持部３０を係合孔３５ａに圧入する。パッ
キン支持部３０が係合孔３５ａに圧入される形で、パッ
キン支持部３０が係合孔３５ａに所定の状態で係合する
ことにより、ピストン２３に対するパッキン３３の挿着
を完了する。次いで、パッキン３３を挿着したピストン
２３を、シリンジ本体２に挿入する。即ち、ピストン２
３に挿着されているパッキン３３のテ−パ部３５ｂ側を
開口端部３ａに整合した後、ピストン２３をシリンジ本
体２に対して矢印Ａ方向に押圧することによって、パッ
キン３３はシリンジ本体２の内部空間２ａに滑る形で挿
入され、該パッキン３３を挿着したピストン２３はシリ
ンジ本体２に挿入される。なお、ピストン２３を矢印Ａ
方向に挿入することにより、パッキン３３及び、内押圧
板２９は、主円筒部３のうちその内径が縮小した係止リ
ブ３ｂの位置を通過する。パッキン３３及び、内押圧板
２９をもって、これらパッキン３３及び、内押圧板２９
の外径よりも小なる内径をもつ該係止リブ３ｂの位置を
通過させる際には、ピストン２３を矢印Ａ方向に更に大
きな力で押圧することによって、内押圧板２９から係止
リブ３ｂに、この押圧による応力を与えて、主円筒部３
の係止リブ３ｂ付近の内径を拡大させ、或いは、パッキ
ン３３に係止リブ３ｂからこの押圧に対する反力を受け
させて、該反力によりパッキン３３の外径を適宜縮小さ
せる形で通過させる。更に、ピストン２３を矢印Ａ方向
に滑る形で挿入させ、パッキン３３のテ−パ部３５ｂ
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２３を挿入させ、ピストン２３の挿
入を終える。The syringe 1 is constructed as described above, and when assembling the syringe 1, the following procedure is performed. That is, the syringe 100, the hub 9, the injection needle 21, the piston 23, and the packing 33, which are the components of the syringe 1, are prepared, and first, the packing 33 is inserted into and attached to the piston 23. That is, the insertion portion 31b of the hub engagement portion 31 of the piston 23 is aligned with the opening end portion of the engagement hole 35a of the packing 33 on the arrow B side in the drawing, and the piston 23 is directly attached to the packing 33 by the arrow A. Packing 3 by pressing in the direction
By utilizing the flexibility of 3, the piston 23 from the engaging portion 31
The packing support portion 30 is pressed into the engagement hole 35a. The packing support part 30 is press-fitted into the engagement hole 35a, and the packing support part 30 engages with the engagement hole 35a in a predetermined state, thereby completing the insertion of the packing 33 into the piston 23. Next, the piston 23 with the packing 33 inserted therein is inserted into the syringe body 2. That is, piston 2
After aligning the taper portion 35b side of the packing 33, which is inserted and attached to 3, with the opening end portion 3a, the piston 33 is pressed against the syringe main body 2 in the direction of arrow A, so that the packing 33 is attached to the syringe main body 2 The piston 23, which is slidably inserted into the internal space 2a of the above and has the packing 33 inserted therein, is inserted into the syringe body 2. In addition, the piston 23
By inserting in the direction, the packing 33 and the inner pressing plate 29 pass through the position of the locking rib 3b of which the inner diameter is reduced in the main cylindrical portion 3. With the packing 33 and the inner pressing plate 29, the packing 33 and the inner pressing plate 29
When passing through the position of the locking rib 3b having an inner diameter smaller than the outer diameter of the piston 23, the piston 23 is pressed with a larger force in the direction of arrow A, so that the inner pressing plate 29 moves to the locking rib 3b. , The main cylindrical portion 3 is given a stress by this pressing.
The inner diameter near the locking rib 3b is increased, or the packing 33 is made to receive a reaction force from the locking rib 3b against this pressing force, and the reaction force causes the outer diameter of the packing 33 to be appropriately reduced and passed. Further, the piston 23 is slid in the direction of arrow A, and the taper portion 35b of the packing 33 is inserted.
However, the piston 23 is inserted to the position where the piston 23 is aligned and inserted into the taper portion 6 of the syringe body 2, and the insertion of the piston 23 is completed.
【００１６】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つの部分に分割されて
いる。また、押圧することにより、該ハブ９の端面１０
ｂ側付近の周囲と端壁８の孔８ａに面したテ−パ状のテ
ーパ面８ｃとが互いに押圧する形で当接して、ハブ挿着
部４の前記分割された部分には、これら分割された部分
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４のこれら分割された部分は、ハブ挿着
部４のうち分割されていない他の部分に比べて構造上矢
印Ｃ方向に弾性屈曲変形しやすいので、ハブ９を押圧す
るに従って、ハブ挿着部４のこれら分割された部分は矢
印Ｃ方向に弾性屈曲変形し、よって孔８ａの径が拡大さ
れる。ハブ９を更に押圧して、孔８ａの径をハブ９の主
円柱部１０の外径まで拡大させて、該ハブ９をハブ挿着
孔４ｂに挿入して行き、該ハブ９の主円柱部１０を完全
にハブ挿着孔４ｂに挿入して該ハブ９の押圧挿入を停止
する。なお、ハブ９の主円柱部１０の外周面１０ｆと、
小円筒部７のうちハブ止リブ７ｄが形成されていない部
分の内周面７ａとの間には隙間空間４９が形成されてい
るので（或いは、隙間空間４９が形成されていなくとも
外周面１０ｆと、ハブ止リブ７ｄ以外の内周面７ａとの
間には摩擦抵抗等の大きな接触がないので）、該ハブ９
は、小円筒部７の孔内空間４ａにスム−ズに挿入され
る。また、該ハブ９の主円柱部１０が完全にハブ挿着孔
４ｂに挿入された位置では、小円柱部１１は、孔８ａに
貫通挿入している。また、ハブ挿着部４のハブ止リブ７
ｄと、ハブ９のハブ止溝１０ｃとの位置関係は、主円柱
部１０がハブ挿着孔４ｂに完全に挿入されると同時に互
いに整合対応した位置に存在するようになっており、ハ
ブ止リブ７ｄのシ−ル部７ｅ、７ｅと、ハブ止溝１０ｃ
の開口端部１０ｅ、１０ｅ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の挿着を完了する。なお、挿着が完了したハブ９
は、前記ピストン２３のハブ係合部３１の挿入部３１ｂ
が、該挿入部３１ｂの球面３１ｃ側を、該ハブ９に設け
られたピストン係合孔１５の導入部１７に面した壁面１
７ａ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 end wall 8 side of the hub insertion portion 4 is divided into three parts. . Also, by pressing, the end surface 10 of the hub 9
The periphery near the side b and the taper-shaped tapered surface 8c facing the hole 8a of the end wall 8 are pressed against each other, and the divided portions of the hub insertion portion 4 are divided into these divided portions. An acting force acts to elastically bend and deform the formed portion in the direction of arrow C. These divided portions of the hub insertion portion 4 are more likely to be elastically bent and deformed in the direction of arrow C in the structure as compared with the other non-divided portions of the hub insertion portion 4, so that as the hub 9 is pressed, These divided portions of the hub insertion portion 4 are elastically bent and deformed in the direction of arrow C, so that the diameter of the hole 8a is enlarged. The hub 9 is further pressed to increase the diameter of the hole 8a to the outer diameter of the main cylindrical portion 10 of the hub 9, and the hub 9 is inserted into the hub insertion hole 4b. 10 is completely inserted into the hub insertion hole 4b, and the press insertion of the hub 9 is stopped. In addition, the outer peripheral surface 10f of the main cylindrical portion 10 of the hub 9,
Since the clearance space 49 is formed between the small cylindrical portion 7 and the inner peripheral surface 7a of the portion where the hub stop rib 7d is not formed (or the outer peripheral surface 10f even if the clearance space 49 is not formed). Since there is no large contact such as frictional resistance between the inner peripheral surface 7a and the hub stop rib 7d), the hub 9
Is smoothly inserted into the hole inner space 4a of the small cylindrical portion 7. Further, at the position where the main cylindrical portion 10 of the hub 9 is completely inserted into the hub insertion hole 4b, the small cylindrical portion 11 is inserted through the hole 8a. In addition, the hub stop rib 7 of the hub insertion portion 4
The positional relationship between d and the hub stop groove 10c of the hub 9 is such that the main cylindrical portion 10 is completely inserted into the hub insertion hole 4b and, at the same time, exists in a position corresponding to each other. Seal portions 7e, 7e of rib 7d and hub stop groove 10c
The open end portions 10e and 10e of the above are engaged with each other in a manner to abut each other. As described above, the insertion of the hub 9 into the syringe body 2 is completed. The hub 9 that has been inserted
Is an insertion portion 31b of the hub engaging portion 31 of the piston 23.
However, the wall surface 1 in which the spherical surface 31c side of the insertion portion 31b faces the introduction portion 17 of the piston engagement hole 15 provided in the hub 9
It exists so as to be in contact with 7a. In addition, the syringe body 2
The hub 9 can be inserted into and attached to the hub 9 by pressing the hub 9, and the operation is easy without complicated assembling operation.
【００１７】次いで、ハブ９の針挿入孔１２に注射針２
１を挿入し接着する。つまり、注射針２１を、図１及
び、図２に示すように、該注射針２１の後端側より、針
挿入孔１２に矢印Ｂ方向に挿入し、該後端が、針挿入孔
１２の奥のハブ９による壁面１０ｄ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
２１との間の隙間に接着剤２２を充填して、該接着剤２
２を固結させ、ハブ９に対する注射針２１の挿入接着が
完了する。なお、針挿入孔１２には、矢印Ｂ方向に向か
って内径が縮小したテーパ状に形成された箇所が適宜設
けられているため、接着剤２２は、該針挿入孔１２の矢
印Ｂ側の奥端まで充分に流入され、接着剤２２の充填が
確実に行われる。注射針２１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２１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り、また、ハブ９は、ピストン２
３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。なお、上述した組立は、注
射針２１を予めハブ９に挿入接着した状態で該注射針２
６の挿入接着されたハブ９をシリンジ本体２に挿着する
手順で行ってもよい。Next, the injection needle 2 is inserted into the needle insertion hole 12 of the hub 9.
Insert 1 and glue. That is, as shown in FIGS. 1 and 2, the injection needle 21 is inserted from the rear end side of the injection needle 21 into the needle insertion hole 12 in the direction of arrow B, and the rear end of the injection needle 21 is Insert it until it contacts the wall surface 10d formed by the hub 9 at the back. After the insertion, the gap between the hub 9 and the injection needle 21 in the needle insertion hole 12 is filled with the adhesive 22, and the adhesive 2
2 is solidified, and insertion and adhesion of the injection needle 21 to the hub 9 is completed. Since the needle insertion hole 12 is appropriately provided with a tapered portion whose inner diameter is reduced in the direction of the arrow B, the adhesive 22 is applied to the back of the needle insertion hole 12 on the arrow B side. The adhesive 22 is sufficiently filled to the end, and the adhesive 22 is reliably filled. The assembly of the syringe 1 is completed when the insertion and adhesion of the injection needle 21 is completed. As described above, most of the work (that is, all the work except the work of inserting and fixing the injection needle 21) is performed by pressing the assembly of the syringe 1. Is easy without any complicated work, and the hub 9 is the piston 2
Since 3 is inserted after being inserted into the syringe body 2,
It is possible to prevent dust and the like from entering the internal space 2a when the hub 9 is inserted. The above-described assembly is performed by inserting the injection needle 21 into the hub 9 in advance and adhering the same to the hub 9.
It is also possible to perform the procedure of inserting and adhering the hub 9 into which the insertion and adhesion of 6 is adhered to the syringe body 2.
【００１８】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、注射器１の注射針２１を、図示しない薬ビン
に入っている注射媒体５２の中に進入させ、ピストン２
３をシリンジ本体２に対して矢印Ｂ方向に引っ張り、差
圧により、該薬ビンの中の注射媒体５２を、注射針２１
の媒体流通孔２１ａ及び、ハブ９の流通孔１３、ピスト
ン係合孔１５を通して、ハブ挿着部４のハブ９より図１
右方の孔内空間４ａ及びシリンジ本体２の内部空間２ａ
のうちピストン２３よりも注射針２１側の空間からなる
媒体保持空間５３に流入させて、注射器１に注射媒体５
２を充填する。なお、注射媒体５２の充填の際、ハブ９
には外部と媒体保持空間５３との間の差圧により矢印Ｂ
方向の差圧力が作用するが、ハブ挿着部４のもつ矢印Ｄ
方向の復元力が、上述したように所定の大きさに設定さ
れていることより、予想される最大の差圧力に対しても
ハブ９とハブ挿着部４との間では矢印Ａ側及び、矢印Ｂ
側の各シール部７ｅと各開口端部１０ｅの間でシール圧
Ｆ１が作用しており、ハブ止リブ７ｄとハブ９との間の
シールが外れない。The syringe 1 constructed and assembled as described above is used, and after use, it is discarded as follows. First, the injection needle 21 of the syringe 1 is advanced into the injection medium 52 contained in a drug bottle (not shown), and the piston 2
3 is pulled in the direction of arrow B with respect to the syringe body 2, and the injection medium 52 in the drug bottle is pulled by the differential pressure to the injection needle 21.
1 through the medium circulation hole 21a of the hub 9, the circulation hole 13 of the hub 9 and the piston engagement hole 15 from the hub 9 of the hub insertion portion 4 shown in FIG.
The space 4a in the hole on the right side and the internal space 2a of the syringe body 2
Of the injection medium 5 into the medium holding space 53, which is a space closer to the injection needle 21 than the piston 23.
Fill 2. When the injection medium 52 is filled, the hub 9
Arrow B due to the pressure difference between the outside and the medium holding space 53.
Direction differential pressure acts, but the arrow D of the hub insertion part 4 has
Since the restoring force in the direction is set to the predetermined magnitude as described above, the direction of the arrow A between the hub 9 and the hub insertion portion 4 and the maximum expected pressure difference, Arrow B
The seal pressure F1 acts between each seal portion 7e on the side and each open end portion 10e, and the seal between the hub stop rib 7d and the hub 9 does not come off.
【００１９】注射媒体５２の充填の後、注射器１の注射
針２１を、患者の注射部位に突き差す。次いで、ピスト
ン２３の外押圧板２７を矢印Ａ方向に押し、ピストン２
３をシリンジ本体２に対して矢印Ａ方向に駆動させる。
媒体保持空間５３の注射媒体５２は加圧されて、ハブ９
のピストン係合孔１５及び、流通孔１３及び、注射針２
１の媒体流通孔２１ａを介して患者の注射部位における
体内に流入する。なお、注射媒体５２が加圧され、注射
媒体５２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５２の圧力による作用力が矢印Ａ方
向に加わるが、ハブ挿着部４のもつ矢印Ｄ方向の復元力
が、上述したように所定の大きさに設定されていること
より、予想される最大の作用力に対してもハブ９とハブ
挿着部４との間では矢印Ａ側及び、矢印Ｂ側の各シール
部７ｅと各開口端部１０ｅの間でシール圧Ｆ１が作用し
ており、ハブ止リブ７ｄとハブ９との間のシールが外れ
ない。注射媒体５２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３３のテー
パ部３５ｂが、シリンジ本体２のテーパ部６の内部に整
合して挿入し、ピストン２３のハブ係合部３１の挿入部
３１ｂが、図１に示すように、ハブ９のピストン係合孔
１５の導入孔１７における壁面１７ａに当接するまでピ
ストン２３を駆動させた後、注射器１を全体を患者に対
して矢印Ｂ方向に引っ張り、注射針２１を患者の注射部
位から引き抜く。After filling the injection medium 52, the injection needle 21 of the syringe 1 is pierced at the injection site of the patient. Next, the outer pressing plate 27 of the piston 23 is pushed in the direction of arrow A, and the piston 2
3 is driven in the direction of arrow A with respect to the syringe body 2.
The injection medium 52 in the medium holding space 53 is pressurized and the hub 9
Piston engagement hole 15, communication hole 13, and injection needle 2
It flows into the body at the injection site of the patient through the first medium circulation hole 21a. It should be noted that the injection medium 52 is pressurized, and the action force due to the pressure of the injection medium 52 is applied to the hub 9 from the end surface 10b side of the hub 9 adjacent to the injection medium 52 in the direction of the arrow A. Since the restoring force of the portion 4 in the direction of the arrow D is set to the predetermined magnitude as described above, the portion between the hub 9 and the hub insertion portion 4 is set to the maximum expected acting force. Then, the seal pressure F1 acts between the seal portions 7e on the arrow A side and the seal portions 7e on the arrow B side and the open end portions 10e, and the seal between the hub stop rib 7d and the hub 9 does not come off. After injecting the injection medium 52 up to a predetermined amount into the body of the patient at the injection site, the tapered portion 35b of the packing 33 is therefore inserted into the tapered portion 6 of the syringe body 2 in alignment with the hub of the piston 23. As shown in FIG. 1, the insertion portion 31b of the engaging portion 31 drives the piston 23 until the insertion portion 31b contacts the wall surface 17a of the introduction hole 17 of the piston engaging hole 15 of the hub 9, and then the syringe 1 is entirely attached to the patient. With respect to the arrow B direction, the injection needle 21 is pulled out from the injection site of the patient.
【００２０】注射針２１を引き抜いた後、注射針収納動
作を以下のように行う。注射針収納動作は、まずピスト
ン２３とハブ９との係合動作を以下のように行う。即
ち、ピストン２３の外押圧板２７を指で、更に矢印Ａ方
向に押圧して、パッキン３３をシリンジ本体２のテーパ
部６に押圧して弾性縮小させながら、パッキン支持部３
０の挿入円柱部３０ｂ及び、ハブ係合部３１を、ハブ挿
着孔４ｂ中において矢印Ａ方向に押圧移動させ、ハブ係
合部３１の挿入部３１ｂをピストン係合孔１５の導入部
１７から係合保持部１６に向かって矢印Ａ方向に押圧移
動させる。つまり、ピストン２３を矢印Ａ方向に押圧移
動させることによって、挿入部３１ｂは、導入部１７に
おける壁面１７ａに押圧される。しかし、挿入部３１ｂ
の矢印Ａ側は球面３１ｃとなっており、従って、挿入部
３１ｂは軸心Ｐ１に垂直な断面が矢印Ａ方向に向かって
縮小する形に形成されており、挿入部３１ｂはこの球面
３１ｃにおいて壁面１７ａに押圧される。また、導入部
１７も、その内部が矢印Ａ方向に向かって縮小するテー
パ状に形成されている。従って、挿入部３１ｂを導入部
１７において矢印Ａ方向に押圧させることにより、挿入
部３１ｂと壁面１７ａを形成する突出部２０との両者間
においてそれぞれ作用している押圧による応力が、挿入
部３１ｂに対してはその軸心Ｐ１に垂直な断面積を弾性
的に縮小させる形で、突出部２０に対しては導入部１７
の内部を矢印Ｃ方向に弾性的に拡大させる形で、それぞ
れ効果的に作用する。結局、挿入部３１ｂの軸心Ｐ１に
垂直な断面積が縮小され、導入部１７の内部が矢印Ｃ方
向に拡大されることによって、矢印Ａ方向に押圧されて
いる挿入部３１ｂは導入部１７において矢印Ａ方向に移
動する。After pulling out the injection needle 21, the operation for retracting the injection needle is performed as follows. In the injection needle storing operation, first, the engaging operation between the piston 23 and the hub 9 is performed as follows. That is, the outer pressing plate 27 of the piston 23 is further pressed with a finger in the direction of the arrow A, and the packing 33 is pressed against the taper portion 6 of the syringe body 2 to elastically reduce the size of the packing support portion 3
The insertion columnar portion 30b of 0 and the hub engaging portion 31 are pushed and moved in the direction of arrow A in the hub insertion hole 4b, and the insertion portion 31b of the hub engaging portion 31 is removed from the introduction portion 17 of the piston engaging hole 15. It is pressed and moved in the direction of arrow A toward the engagement holding portion 16. That is, by pushing and moving the piston 23 in the direction of arrow A, the insertion portion 31 b is pushed by the wall surface 17 a of the introduction portion 17. However, the insertion portion 31b
The arrow A side of is a spherical surface 31c. Therefore, the insertion portion 31b is formed such that the cross section perpendicular to the axis P1 is reduced in the direction of the arrow A, and the insertion portion 31b has a wall surface on the spherical surface 31c. It is pressed by 17a. Further, the introduction portion 17 is also formed in a tapered shape in which the inside thereof is reduced in the direction of arrow A. Therefore, by pressing the insertion portion 31b in the direction of the arrow A in the introduction portion 17, the stress due to the pressure acting between the insertion portion 31b and the protruding portion 20 forming the wall surface 17a is applied to the insertion portion 31b. On the other hand, the cross-sectional area perpendicular to the axis P1 is elastically reduced, and the introduction portion 17 is provided for the protrusion 20.
Each of them effectively works by elastically expanding the inside of the arrow in the direction of arrow C. Eventually, the cross-sectional area perpendicular to the axis P1 of the insertion portion 31b is reduced, and the inside of the introduction portion 17 is expanded in the direction of arrow C, so that the insertion portion 31b pressed in the direction of arrow A is inserted in the introduction portion 17. Move in the direction of arrow A.
【００２１】ところで、注射針収納動作を開始する直前
においては、図１に示すように、ハブ９の端面１０ｂと
ピストン２３側の挿入円柱部３０ｂとの間に存在する孔
内空間４ａ（即ち、媒体保持空間５３）には、残留した
注射媒体５２で充満されている。また、注射針収納動作
を開始して上述したようにピストン２３を矢印Ａ方に押
圧移動させることによって、残留した注射媒体５２は加
圧される。しかし、挿入部３１ｂには上述したように複
数の溝３２が設けられており、挿入部３１ｂと壁面１７
ａとが押圧当接した際にも、これら溝３２は閉塞されな
いようになっている。従って、挿入部３１ｂと壁面１７
ａとが押圧当接した際にも、孔内空間４ａ側と係合保持
部１６側とはこれら溝３２を連通しており、孔内空間４
ａの加圧された残留した注射媒体５２は、これら溝３２
を介して係合保持部１６側に流動し、更に、流通孔１
３、注射針２１の媒体流通孔２１ａを介して外部に排出
される。つまり、注射針収納動作を開始してピストン２
３を矢印Ａ方に押圧移動させるた際にも、孔内空間４ａ
で加圧される残留した注射媒体５２は適宜外部に排出さ
れて、その圧力を極力上昇させることがないので、ピス
トン２３には残留した注射媒体５２の圧力による抵抗が
極力かからず、ピストン２３は極力小さな力で矢印Ａ方
に押圧移動される。Immediately before starting the operation of accommodating the injection needle, as shown in FIG. 1, the inner space 4a (that is, the space in the hole 4a) existing between the end surface 10b of the hub 9 and the insertion cylindrical portion 30b on the piston 23 side. The medium holding space 53) is filled with the remaining injection medium 52. The remaining injection medium 52 is pressurized by starting the operation of accommodating the injection needle and pressing and moving the piston 23 in the direction of arrow A as described above. However, the insertion portion 31b is provided with the plurality of grooves 32 as described above, and the insertion portion 31b and the wall surface 17 are provided.
These grooves 32 are not closed even when they come into pressure contact with a. Therefore, the insertion portion 31b and the wall surface 17
Even when a is pressed and abutted, the groove 32 is communicated between the hole inner space 4a side and the engagement holding portion 16 side, and the hole inner space 4a
The pressurized residual injection medium 52 of a
Flow toward the engagement holding portion 16 side through the
3. It is discharged to the outside through the medium flow hole 21a of the injection needle 21. That is, the injection needle storing operation is started and the piston 2
Even when 3 is pressed and moved in the direction of arrow A, the hole space 4a
The residual injection medium 52 that is pressurized by is appropriately discharged to the outside and does not increase its pressure as much as possible. Is pressed and moved in the direction of arrow A with the smallest possible force.
【００２２】更に続けて、ピストン２３を矢印Ａ方に押
圧し、該挿入部３１ｂを導入部１７において矢印Ａ方向
に更に移動させ、従って、挿入部３１ｂをその矢印Ａ側
より、導入部１７と係合保持部１６との境界部１９を通
過させる形で該係合保持部１６側に移動させて、挿入部
３１ｂを、図１の二点鎖線で示すように、完全に該係合
保持部１６に挿入させることにより、ピストン２３の押
圧を停止する。挿入部３１ｂが完全に係合保持部１６に
挿入されることにより、ハブ係合部３１とピストン係合
孔１５とは互いに係合され、ピストン２３とハブ９との
係合動作が完了する。なお、挿入部３１ｂに矢印Ａ方向
の押圧力が作用することによって、ハブ９にも矢印Ａ方
向の押圧力が作用する。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、或い
は、支持され得る。従って、ハブ９は、該押圧力を受け
ても矢印Ａ方向等に殆ど移動せず、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。Subsequently, the piston 23 is pressed in the direction of arrow A, and the insertion portion 31b is further moved in the direction of arrow A at the introduction portion 17, so that the insertion portion 31b is moved to the introduction portion 17 from the arrow A side. By moving the boundary portion 19 with the engagement holding portion 16 toward the engagement holding portion 16 side, the insertion portion 31b is completely moved to the engagement holding portion 16 as shown by the chain double-dashed line in FIG. Insertion into 16 stops the pressing of piston 23. When the insertion portion 31b is completely inserted into the engagement holding portion 16, the hub engagement portion 31 and the piston engagement hole 15 are engaged with each other, and the engagement operation between the piston 23 and the hub 9 is completed. Note that the pressing force in the arrow A direction acts on the insertion portion 31b, so that the pressing force in the arrow A direction also acts on the hub 9. However, the hub 9 can be or can be supported in the direction of arrow B by the hand that supports the syringe body 2 via the hub stop rib 7d of the hub insertion portion 4 or the end wall 8. Therefore, the hub 9 hardly moves in the arrow A direction or the like even when receiving the pressing force, and the hub 9 does not slip out of the hole 8a of the end wall 8 in the arrow A direction.
【００２３】次いで、ピストン２３をシリンジ本体２に
対して矢印Ｂ方向に所定の引き抜き力で引く。つまり、
ピストン２３及び、ハブ係合部３１の挿入部３１ｂには
所定の引き抜き力による矢印Ｂ方向の作用力が作用す
る。ところで、ハブ挿着部４のもつ矢印Ｄ方向の復元力
は、上述したように所定の大きさに設定されていること
より、前記所定の引き抜き力による矢印Ｂ方向の作用力
に対しては、ハブ９とハブ挿着部４との間での矢印Ａ側
及び、矢印Ｂ側の各シール部７ｅと各開口端部１０ｅの
間のシールが外れ、従って、ハブ止リブ７ｄとハブ止溝
１０ｃとの係合が外れる。ハブ止リブ７ｄとハブ止溝１
０ｃとの係合を外すと共に、ハブ９を更に矢印Ｂ方向に
進めて、ハブ９が完全にハブ挿着孔４ｂから矢印Ｂ方向
に抜け出るまで引っ張る。なお、ピストン係合孔１５の
係合保持部１６に挿入されているハブ係合部３１の挿入
部３１ｂは、上記の矢印Ｂ方向の引き抜きによって、係
合保持部１６の壁面１６ａに矢印Ｂ方向に向かって押圧
させられる。しかし、挿入部３１ｂと壁面１６ａとの押
圧当接箇所は、挿入部３１ｂにおいては、矢印Ｂ側端部
即ち、挿入部３１ｂのうち最も外径が大きい箇所となっ
ている。しかも、挿入部３１ｂの当接する箇所は、突出
部２０の基部側、即ち肉厚側となっていることから、挿
入部３１ｂ及び突出部２０は挿入部３１ｂと壁面１６ａ
との押圧当接箇所において受ける、壁面１６ａ又は挿入
部３１ｂ側からの反力によっては、構造的に弾性変形し
にくい状態になっている。従って、挿入部３１ｂは上記
の矢印Ｂ方向の引き抜きによって係合保持部１６の外に
抜けることは無く、ピストン２３とハブ９との係合は確
実に維持される。またハブ９の引き抜きの際、ハブ９の
主円柱部１０の外周面１０ｆと、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周面７ａとの間
には隙間空間４９が形成されているので（或いは、隙間
空間４９が形成いされていなくとも外周面１０ｆと、ハ
ブ止リブ７ｄ以外の内周面７ａとの間には摩擦抵抗等の
大きな接触がないので）、その引き抜き動作は、ハブ止
リブ７ｄとハブ止溝１０ｃ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。Next, the piston 23 is pulled with respect to the syringe body 2 in the direction of arrow B with a predetermined pulling force. That is,
An acting force in the arrow B direction due to a predetermined pulling force acts on the piston 23 and the insertion portion 31b of the hub engaging portion 31. By the way, since the restoring force of the hub insertion portion 4 in the arrow D direction is set to the predetermined magnitude as described above, the restoring force in the arrow B direction due to the predetermined pulling force is as follows. The seal between the seal portion 7e on the arrow A side and the seal portion 7e on the arrow B side between the hub 9 and the hub insertion portion 4 and the opening end portion 10e is released, and therefore, the hub stop rib 7d and the hub stop groove 10c. Disengages with. Hub stop rib 7d and hub stop groove 1
0c is disengaged, and the hub 9 is further advanced in the arrow B direction until the hub 9 is completely removed from the hub insertion hole 4b in the arrow B direction. The insertion portion 31b of the hub engagement portion 31 inserted into the engagement holding portion 16 of the piston engagement hole 15 is pulled out in the direction of arrow B, so that the wall surface 16a of the engagement holding portion 16 is pulled in the direction of arrow B. Is pressed toward. However, the pressing contact portion between the insertion portion 31b and the wall surface 16a is the end portion on the arrow B side of the insertion portion 31b, that is, the portion having the largest outer diameter of the insertion portion 31b. Moreover, since the contact portion of the insertion portion 31b is on the base side of the protruding portion 20, that is, on the thick side, the insertion portion 31b and the protruding portion 20 have the insertion portion 31b and the wall surface 16a.
Due to the reaction force from the side of the wall surface 16a or the insertion portion 31b, which is received at the pressing and abutting position, the structurally elastically deformed state is difficult. Therefore, the insertion portion 31b does not come out of the engagement holding portion 16 by pulling out in the direction of the arrow B, and the engagement between the piston 23 and the hub 9 is reliably maintained. Further, when the hub 9 is pulled out, a gap space 49 is formed between the outer peripheral surface 10f of the main cylindrical portion 10 of the hub 9 and the inner peripheral surface 7a of the small cylindrical portion 7 where the hub stop rib 7d is not formed. (Or because there is no large contact such as frictional resistance between the outer peripheral surface 10f and the inner peripheral surface 7a other than the hub stop rib 7d even if the clearance space 49 is not formed), The pull-out operation can be easily performed with a small force after the engagement between the hub stop rib 7d and the hub stop groove 10c is released.
【００２４】更にピストン２３を引っ張り、ハブ９の矢
印Ａ側に固定挿入された注射針２１が端壁８の孔８ａよ
りハブ挿着孔４ｂに矢印Ｂ方向に挿入され、更に矢印Ｂ
方向に主円筒部３の内部空間２ａに挿入されて、注射針
２１の先端が完全に内部空間２ａ内に挿入される形で、
ピストン２３を矢印Ｂ方向に引っ張る。ピストン２３を
更に引っ張り、内押圧板２９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２３を停止させる。すると、ピストン本体２５の
切欠き２６が、図５に示すように、シリンジ本体２の開
口端部３ａ付近に位置決めされる。次いで、ピストン２
３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２３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２５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２６においてピスト
ン本体２５は折れ、ピストン本体２５は、切欠き２６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、内押圧板２９が係止リブ３ｂによって当接され係
止されるので、ピストン本体２５の折り取りを行う際に
は、ピストン２３に加える矢印Ｃ方向の力が、これら内
押圧板２９と係止リブ３ｂの当接箇所を支点として、テ
コの原理を応用する形で、ピストン本体２５の切欠き２
６に効果的に作用するので、ピストン本体２５の折り取
りは容易に行われる。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２３の外押圧板２７の
部分とを廃棄処分する。なお、注射針２１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２３
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２１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。以上のように、注射針収納動作が完了し、注射器１
の使用及び、使用後の廃棄処分を全て完了する。Further pulling the piston 23, the injection needle 21 fixedly inserted on the arrow A side of the hub 9 is inserted from the hole 8a of the end wall 8 into the hub insertion hole 4b in the direction of arrow B, and further arrow B.
Is inserted into the inner space 2a of the main cylindrical portion 3 in the direction, and the tip of the injection needle 21 is completely inserted into the inner space 2a.
Pull the piston 23 in the direction of arrow B. The piston 23 is further pulled, and the inner pressing plate 29 is pulled to a position where it abuts on the locking rib 3b of the main cylindrical portion 3 of the syringe body 2 to stop the piston 23. Then, the notch 26 of the piston body 25 is positioned near the open end 3a of the syringe body 2 as shown in FIG. Then piston 2
A force in the direction of arrow C is given to 3. By applying a force in the direction of arrow C to the piston 23 with respect to the syringe body 2, the piston body 25 is bent at the notch 26 formed in the piston body 25, which is structurally weak against bending stress. The main body 25 is separated into a part on the arrow A side and a part on the arrow B side with the notch 26 as a boundary.
Since the inner pressing plate 29 is brought into contact with and locked by the locking rib 3b, when the piston main body 25 is broken, the force in the direction of arrow C applied to the piston 23 and the inner pressing plate 29 are applied. The notch 2 of the piston body 25 is formed by applying the lever principle, with the contact point of the locking rib 3b as the fulcrum.
6, the piston body 25 is easily broken off. Next, the broken portion of the syringe body 2 side and the portion of the outer pressing plate 27 of the piston 23 are discarded. It should be noted that the injection needle 21 is completely attached to the internal space 2a of the syringe body 2 by the remaining piston 23.
Since the needle 21 is inserted and stored while being held at the tip, there is no risk of injuring a hand or the like by the injection needle 21 and causing secondary infection from the wound, and therefore the disposal can be safely performed. As described above, the injection needle storing operation is completed, and the syringe 1
Complete the use and disposal of waste after use.
【００２５】なお、上述の実施例で説明した注射器１に
は、そのシリンジ１００にスリット５０が形成されてい
るが、注射器１のシリンジ１００にはスリット５０が形
成されていなくてもよい。但し、シリンジ１００にスリ
ット５０が形成されていない注射器１を組立てる場合、
ハブ９をハブ挿着孔４ｂに挿着する際、まずハブ９をシ
リンジ１００の開口端部３ａ側から、内部空間２ａに挿
入し、該内部空間２ａを介して該ハブ９をハブ挿着孔４
ｂに挿着する手順で行う。In the syringe 1 described in the above embodiment, the slit 50 is formed in the syringe 100, but the slit 100 may not be formed in the syringe 100 of the syringe 1. However, when assembling the syringe 1 in which the slit 50 is not formed in the syringe 100,
When inserting the hub 9 into the hub insertion hole 4b, first insert the hub 9 into the internal space 2a from the opening end 3a side of the syringe 100, and insert the hub 9 into the hub insertion hole through the internal space 2a. Four
It is carried out by the procedure of inserting into b.
【００２６】また、上述の実施例で説明したハブ９のシ
−ル部は溝即ち、ハブ止溝１０ｃの形で構成されている
が、シ−ル部はハブ本体９０の外周面１０ｆ側に環状に
形成され、かつハブ挿着孔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い。例え
ば、図６或いは、図７に示すように、シ−ル部を突条の
形即ち、シ−ルリブ５７の形で形成することも可能であ
る。即ち、図６に示される実施例では、ハブ９の主円柱
部１０の外周面１０ｆ側には、上述した実施例における
ハブ止溝１０ｃの代わりに、環状に形成されたシ−ルリ
ブ５７が設けられている。なお、シ−ルリブ５７が設け
られたハブ９と共に使用されるシリンジ１００において
は、ハブ挿着孔４ｂの内面側のハブシ−ル部が、前記シ
−ルリブ５７に係合し得る形の、環状のシ−ル溝５９と
して、上述した実施例におけるハブ止リブ７ｄの代わり
に設けられている。また、図７に示される実施例でも、
ハブ９の主円柱部１０の外周面１０ｆ側には、上述した
実施例におけるハブ止溝１０ｃの代わりに、環状に形成
されたシ−ルリブ５７が設けられている。なお、シ−ル
リブ５７が設けられたハブ９と共に使用されるシリンジ
１００においては、ハブ挿着孔４ｂの内面側のハブシ−
ル部が、内周面７ａと同一平面となる形で形成されてい
る。つまり、シ−ルリブ５７は、ハブ挿着孔４ｂの内面
側のハブシ−ル部である内周面７ａを図の矢印Ｃ方向に
押圧して、図の矢印Ａ、Ｂ方向に摩擦力を生じさせる形
で係合する。Further, the seal portion of the hub 9 described in the above embodiment is formed in the shape of the groove, that is, the hub stop groove 10c, but the seal portion is on the outer peripheral surface 10f side of the hub body 90. It may be formed in any shape as long as it is formed in an annular shape and can be engaged with the inner surface of the hub insertion hole 4b. For example, as shown in FIG. 6 or 7, it is possible to form the seal portion in the form of a ridge, that is, in the form of a seal rib 57. That is, in the embodiment shown in FIG. 6, on the outer peripheral surface 10f side of the main cylindrical portion 10 of the hub 9, a ring-shaped seal rib 57 is provided instead of the hub stop groove 10c in the above-described embodiment. Has been. In the syringe 100 used together with the hub 9 provided with the seal rib 57, the hub seal portion on the inner surface side of the hub insertion hole 4b has an annular shape that can engage with the seal rib 57. The seal groove 59 is provided in place of the hub stop rib 7d in the above-described embodiment. In addition, in the embodiment shown in FIG.
On the outer peripheral surface 10f side of the main cylindrical portion 10 of the hub 9, a ring-shaped seal rib 57 is provided instead of the hub stop groove 10c in the above-described embodiment. In the syringe 100 used with the hub 9 provided with the seal rib 57, the hub seal on the inner surface side of the hub insertion hole 4b is used.
Is formed so as to be flush with the inner peripheral surface 7a. That is, the seal rib 57 presses the inner peripheral surface 7a, which is the hub seal portion on the inner surface side of the hub insertion hole 4b, in the direction of arrow C in the drawing to generate a frictional force in the directions of arrows A and B in the drawing. Engage in a form that allows it.
【００２７】また、上述の実施例で説明したハブ９のシ
−ル部を、図８に示すように突条の形即ち、ヒダ部６１
の形で形成することも可能である。即ち、図８に示され
る実施例では、ハブ９の主円柱部１０は、主円柱部１０
の軸心Ｐ１の方向のうち矢印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１０ｆ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６１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
Ｆ１で接触係合している。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、構造上ハブ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。As shown in FIG. 8, the seal portion of the hub 9 described in the above embodiment is formed in the shape of a ridge, that is, a fold portion 61.
It is also possible to form in the form of. That is, in the embodiment shown in FIG. 8, the main cylindrical portion 10 of the hub 9 is
Of the plurality of main columnar pieces 60 (5 in FIG. 8) whose outer diameter is reduced in the direction of the arrow P of the axis P1 of FIG. Column piece 60
Are integrally formed in a series in the directions of arrows A and B. That is, on the outer peripheral surface 10f side of the main columnar portion 10 of the hub 9, a plurality of ridge-shaped ridge portions 61 formed by the plurality of main columnar portion pieces 60 are annularly provided. Therefore, the main cylindrical portion 10 of the hub 9 is inserted into the hub insertion hole 4b, so that the plurality of folds 61 of the main cylindrical portion 10 are
It is in contact with the inner peripheral surface 7a of the hub insertion hole 4b at a predetermined seal pressure F1. 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, structurally, the hub 9 can be smoothly inserted into the hub insertion hole 4b. In addition, the main cylindrical portion 10 is a table.
Since it is easily inserted into the hub insertion hole 4b by the pad-shaped fold portion 61, not only the syringe body 2 provided with the slit 50 in the hub insertion hole 4b but also the slit 50 in the hub insertion hole 4b.
It can also be applied to the syringe main body 2 without.
【００２８】また、上述の実施例では、ハブ係合部３１
の第一バイパス手段が、挿入部３１ｂに設けられた溝３
２として設けられている。しかし、該第一バイパス手段
は、ハブ係合部３１がハブ９と当接した際に、ハブ９の
ピストン係合孔１５とシリンジ１００の内部の媒体保持
空間５３を連通する形で設けられるならば、どのように
設けられてもよい。例えば、図９に示すように、ハブ係
合部３１のピストン係合孔１５と対向した挿入部３１ｂ
の先端（即ち、矢印Ａ側の端部）に１つの開口部３９ａ
を形成し、ハブ係合部３１の円柱部３１ａの外周面側に
その他の複数の開口部３９ｂを形成し、これら挿入部３
１ｂ側の開口部３９ａと円柱部３１ａ側の開口部３９ｂ
とを互いに連通させる形のバイパス孔３９を挿入部３１
ｂと円柱部３１ａに亙って穿設し、このバイパス孔３９
を第一バイパス手段としてもよい。Further, in the above embodiment, the hub engaging portion 31
The first bypass means of the groove 3 provided in the insertion portion 31b.
It is provided as 2. However, if the first bypass means is provided so that the piston engagement hole 15 of the hub 9 and the medium holding space 53 inside the syringe 100 communicate with each other when the hub engagement portion 31 contacts the hub 9. However, it may be provided in any manner. For example, as shown in FIG. 9, the insertion portion 31 b facing the piston engagement hole 15 of the hub engagement portion 31.
One opening 39a at the tip (that is, the end on the arrow A side) of the
And a plurality of other openings 39b are formed on the outer peripheral surface side of the cylindrical portion 31a of the hub engaging portion 31.
1b-side opening 39a and column 31a-side opening 39b
A bypass hole 39 that allows communication between
b and the cylindrical portion 31a, the bypass hole 39
May be the first bypass means.
【００２９】また、上述の実施例では、ハブ係合部３１
がハブ９と当接した際にもピストン係合孔１５と、シリ
ンジ１００の媒体保持空間５３との間を互いに連通させ
るため、ハブ係合部３１に第一バイパス手段を設けてい
る。しかし、第一バイパス手段の代わりに、ハブ９側に
ハブ９の流通孔１３などの注射針２１の媒体流通孔２１
ａと連通した連通空間と、シリンジ１００の内部の媒体
保持空間５３とを連通する、従って、ピストン係合孔１
５と、媒体保持空間５３とを連通する第二バイパス手段
を形成することも可能である。例えば第二バイパス手段
は、図１０に示すように、ピストン係合孔１５の導入孔
１７に面した壁面１７ａに沿って、しかも係合保持部１
６と導入孔１７の開口部１７ｂとの間を連絡する形で形
成された複数のハブバイパス溝４０の形で形成されても
よい。壁面１７ａにハブバイパス溝４０が形成されてい
る場合、ハブ係合部３１がハブ９と当接した際にもピス
トン係合孔１５と、シリンジ１００の媒体保持空間５３
との間はハブバイパス溝４０を介して互いに連通する。Further, in the above embodiment, the hub engaging portion 31
The hub engaging portion 31 is provided with the first bypass means so that the piston engaging hole 15 and the medium holding space 53 of the syringe 100 can communicate with each other even when they contact the hub 9. However, instead of the first bypass means, the medium passage hole 21 of the injection needle 21 such as the passage hole 13 of the hub 9 is provided on the hub 9 side.
The communication space communicating with “a” communicates with the medium holding space 53 inside the syringe 100. Therefore, the piston engaging hole 1
It is also possible to form a second bypass means that connects the medium 5 and the medium holding space 53. For example, as shown in FIG. 10, the second bypass means is provided along the wall surface 17a of the piston engagement hole 15 which faces the introduction hole 17, and the engagement holding portion 1 is provided.
It may be formed in the form of a plurality of hub bypass grooves 40 formed so as to connect between 6 and the opening 17b of the introduction hole 17. When the hub bypass groove 40 is formed on the wall surface 17 a, even when the hub engaging portion 31 contacts the hub 9, the piston engaging hole 15 and the medium holding space 53 of the syringe 100.
Are communicated with each other via a hub bypass groove 40.
【００３０】また、第一バイパス手段の代わりに形成さ
れる第二バイパス手段は、図１１に示すように、係合保
持部１６の壁面１６ａとハブ９の外周面１０ｆとの間を
ハブ本体９０を貫通する形で穿設された孔であるハブバ
イパス孔４１の形で形成されてもよい。また、ハブバイ
パス孔４１は、流通孔１３とハブ９の外部との間をハブ
本体９０を貫通する形で穿設した孔の形で形成されても
よい。As shown in FIG. 11, the second bypass means formed in place of the first bypass means has a hub body 90 between the wall surface 16a of the engagement holding portion 16 and the outer peripheral surface 10f of the hub 9. It may be formed in the form of a hub bypass hole 41 that is a hole that is formed by penetrating through. Further, the hub bypass hole 41 may be formed in the form of a hole that is formed between the flow hole 13 and the outside of the hub 9 so as to penetrate the hub body 90.
【発明の効果】以上説明したように、本発明のうち第１
の発明は、ピストン２３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１０ｃ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、前記ハブ本体の端面１１ａ等の一端に、注射針
２１等の注射針を挿入し得る針挿入孔１２等の針挿入孔
を、前記ハブ本体の矢印Ａ、Ｂ方向等の軸心方向に設
け、前記ハブ本体の端面１０ｂ等の他端に、ピストン係
合孔１５等のハブ側係合手段を、前記ピストンと係合自
在にかつ、前記針挿入孔との間で連通空間を形成する形
で設けて構成したので、ハブ本体とハブ挿着穴とがシ−
ル部を介して接触することにより、両者間は確実にシー
ルされ、ハブ挿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
注射針のシリンジ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２の発
明は、第１の発明のハブを、ハブ止溝１０ｃ等のシ−ル
部を溝の形で形成して構成したので、第１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３の発明は、第１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１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４の発明は、先端に孔８
ａ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１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１
０ｃ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シール圧Ｆ１等
の所定の接触圧力で接触係合させた形で設けて構成した
ので、第１の発明の効果に加えて、ハブ本体とハブ挿着
穴とがシ−ル部を介して接触することにより、両者間は
確実にシールされ、ハブ挿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、使用後の注射針の
シリンジ内への引き込みに際しても小さな引込み力でハ
ブをシリンジ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５の発明は、先端に孔８
ａ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２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１０ｃ等のシ−ル部を
該ハブシール部に対して所定のシール圧Ｆ１等の所定の
接触圧力で接触係合させた形で設けて構成したので、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６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３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シール圧Ｆ１
等の所定の接触圧力で接触係合させた形で設けて構成し
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
７の発明は、第５又は第６の発明によるハブの接続構造
において、ハブ止溝１０ｃ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５
９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８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３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シール圧Ｆ１等の
所定の接触圧力で接触係合させた形で設けて構成したの
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９の
発明は、第４又は第５又は第６又は第８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１０の発明は、第４又は第５又は
第６又は第８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
てハブをハブ挿着穴側から容易に挿入装着することが出
来るばかりか、ハブ挿着時には、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、ハブ挿着
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２
３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１５等のハブ側係合手段と係合し得るハブ係合部
３１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２１等の注射針を設けて構成したので、第
４、第５、第６、第８のそれぞれ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１５の発明は、第１２又は第１３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１６の発明は、第１１又は第１２又は第１３又
は第１４の発明の注射器において、前記ピストンはピス
トン本体２５等のピストン本体が外押圧板２７等の操作
部と内押圧板２９、パッキン支持部３０、パッキン３３
等の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１７の発明は、第１６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２９、パッキン支持部３
０、パッキン３３等の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１８
及び１９の発明は、第１６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２５等のピストン本
体には切欠き２６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２０の発明は、第１９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２１の発明は、第１１又は第１２又は第１３
又は第１４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２２の発明は、第１１又は第１２又は第１
３又は第１４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、ハブ挿着時には、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、ハブ挿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２３の発明は、第１１又は第１２又は第１３又は
第１４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、
ハブ挿着時には、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、ハブ挿着時に塵埃がシリ
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、ハブのハブ挿着穴への挿着時には、既
に注射針がハブに挿着されているので、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２４の発明
は、第１１又は第１２又は第１３又は第１４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、ハブ挿着時には、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、ハブのハブ挿着穴への挿着時
には、既に注射針がハブに挿着されているので、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挿着穴側から容易に挿入装着する
ことが出来るので、ハブの挿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２５の発明
は、第１１又は第１２又は第１３又は第１４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、ハブ挿着時には、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、ハブ挿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挿着穴側から容易に挿
入装着することが出来るので、ハブの挿着作業を迅速か
つ容易に行なうことができる。また、本発明のうち第２
６の発明は、内部空間２ａ等の内部に媒体保持空間５３
等の液保持空間が形成された筒状のシリンジ１００等の
シリンジを有し、前記シリンジにハブ９等のハブを着脱
自在に挿着して設け、前記ハブの前記液保持空間に背向
した側に注射針２１等の注射針を接合して設け、前記ハ
ブに、該ハブの前記シリンジの液保持空間に対向した端
部１０ｂ等の端部に開口部１７ｂ等の開口部を形成する
形でピストン係合孔１５等のハブ側係合手段を、前記注
射針の媒体流通孔２１ａ等の液流通孔と連通したピスト
ン係合孔１５、流通孔１３等の連通空間を形成する形で
設け、前記シリンジに、該シリンジの内部を軸方向に閉
塞する形のピストン２３等のピストンを、前記シリンジ
に対して矢印Ａ、Ｂ方向等の軸方向に移動自在に設け、
前記ピストンにハブ係合部３１等のピストン側係合手段
を、前記ハブのハブ側係合手段に対向する形で、該ハブ
側係合手段に対して挿入係合自在に設け、前記ピストン
側係合手段に、該ピストン側係合手段が前記ハブと当接
した際に、前記連通空間と前記液保持空間を連通する溝
３２、バイパス孔３９等の第一バイパス手段を形成して
構成したので、注射器を使用した後の注射針収納動作時
に、ハブ側係合手段とピストン側係合手段とを係合させ
る際、液保持空間に残留した薬液などがハブとピストン
の間で圧迫されるが、圧迫により昇圧した薬液は差圧に
より、第一バイパス手段を介して注射針の液流通孔側に
適宜流出するので、液保持空間に残留した薬液などの昇
圧は極力低く抑制され、従って、ピストンには昇圧した
薬液などによる抵抗が殆ど働かず、該ピストンの操作は
大きな力を必要とせず容易になる。また、本発明のうち
第２７の発明は、第２６の発明の注射器において、前記
第一バイパス手段は前記ピストン側係合手段の表面に沿
って形成された溝であるので、第２６の発明の効果に加
えて、ピストン側係合手段に対する第一バイパス手段の
加工形成が容易になる。また、本発明のうち第２８の発
明は、第２６の発明の注射器において、前記第一バイパ
ス手段は前記ピストン側係合手段に穿設された孔である
ので、第２６の発明の効果に加えて、ピストン側係合手
段がハブと当接した際に、第一バイパス手段とハブとの
間の接触を無くすることが出来、よって、第一バイパス
手段が閉塞されることがないのでピストンの操作は確実
かつ容易に行われる。また、本発明のうち第２９の発明
は、内部空間２ａ等の内部に媒体保持空間５３等の液保
持空間が形成された筒状のシリンジ１００等のシリンジ
を有し、前記シリンジにハブ９等のハブを着脱自在に挿
着して設け、前記ハブの前記液保持空間に背向した側に
注射針２１等の注射針を接合して設け、前記ハブに、該
ハブの前記シリンジの液保持空間に対向した端部１０ｂ
等の端部に開口部１７ｂ等の開口部を形成する形でピス
トン係合孔１５等のハブ側係合手段を、前記注射針の媒
体流通孔２１ａ等の液流通孔と連通したピストン係合孔
１５、流通孔１３等の連通空間を形成する形で設け、前
記ハブに、前記液保持空間と前記連通空間とを連通する
ハブバイパス溝４０、ハブバイパス孔４１等の第二バイ
パス手段を形成し、前記シリンジに、該シリンジの内部
を矢印Ａ、Ｂ方向等の軸方向に閉塞する形のピストン２
３等のピストンを、前記シリンジに対して軸方向に移動
自在に設け、前記ピストンにハブ係合部３１等のピスト
ン側係合手段を、前記ハブのハブ側係合手段に対向する
形で、前記ハブ側係合手段に対して挿入係合自在に設け
て構成したので、注射器を使用した後の注射針収納動作
時に、ハブ側係合手段とピストン側係合手段とを係合さ
せる際、液保持空間に残留した薬液などがハブとピスト
ンの間で圧迫されるが、圧迫により昇圧した薬液などは
差圧により、第二バイパス手段を介して注射針の液流通
孔側に適宜流出するので、液保持空間に残留した薬液な
どの昇圧は極力低く抑制され、従って、ピストンには昇
圧した薬液などによる抵抗が殆ど働かず、該ピストンの
操作は大きな力を必要とせず容易になる。また、本発明
のうち第３０の発明は、第２９の発明の注射器におい
て、前記第二バイパス手段は前記ハブ側係合手段の表面
に沿って形成された溝であるので、第２９の発明の効果
に加えて、ハブに対する第二バイパス手段の加工形成が
容易になる。また、本発明のうち第３１の発明は、第２
９の発明の注射器において、前記第二バイパス手段は前
記ハブに穿設された孔であるので、第２９の発明の効果
に加えて、ピストン側係合手段がハブと当接した際に、
第二バイパス手段とピストン側係合手段との間の接触を
無くすることが出来、よって、第二バイパス手段が閉塞
されることがないのでピストンの操作は確実かつ容易に
行われる。また、本発明のうち第３２の発明は、第２６
の発明の注射器に使用されるピストンにおいて、ピスト
ンはピストン本体２５等のピストン本体を有し、前記ピ
ストン本体の先端側に、前記シリンジの内部を軸方向に
閉塞し得るとともに、前記シリンジの内部を軸方向に摺
動移動し得る内押圧板２９、パッキン支持部３０、パッ
キン３３等の押圧部を設け、前記押圧部の先端側に、前
記ハブ側係合手段に対して挿入係合自在なる前記ピスト
ン側係合手段を設け、前記ピストン側係合手段に、該ピ
ストン側係合手段が前記ハブと当接した際に、前記連通
空間と前記液保持空間を連通する溝３２、バイパス孔３
９等の第一バイパス手段を形成して構成したので、第２
６の発明における効果と同様の効果に加えて、ピストン
側に第一バイパス手段が形成されていることから、各種
のハブを状況に応じて使い分けることが可能となる。ま
た、本発明のうち第３３の発明は、第３２の発明のピス
トンにおいて、前記第一バイパス手段は前記ピストン側
係合手段の表面に沿って形成された溝であるので、第３
２の発明の効果に加えて、第２７の効果を生む。また、
本発明のうち第３４の発明は、第３２の発明のピストン
において、前記第一バイパス手段は前記ピストン側係合
手段に穿設された孔であるので、第３２の発明の効果に
加えて、第２８の発明の効果を生む。また、本発明のう
ち第３５の発明は、ピストン２３等のピストンが摺動自
在に装着されたシリンジ１００等のシリンジに対して挿
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、前記シリンジに着脱自在に挿着され得るハブ本体９
０等のハブ本体を有し、前記ハブ本体の端部１１ａ等の
一端に、注射針２１等の注射針を挿入し得る針挿入孔１
２等の針挿入部を、前記ハブ本体の矢印Ａ、Ｂ方向等の
軸心方向に設け、前記ハブ本体に、該ハブ本体の端部１
０ｂ等の他端に開口部１７ｂ等の開口部を形成する形で
ピストン係合孔１５等のハブ側係合手段を、前記針挿入
部と連通したピストン係合孔１５、流通孔１３等の連通
空間を形成する形で設け、前記ハブ本体に、該ハブ本体
が前記シリンジに挿着された際に、前記シリンジ内部の
媒体保持空間５３等の液保持空間と前記連通空間とを連
通するハブバイパス溝４０、ハブバイパス孔４１等の第
二バイパス手段を形成して構成したので、第２９の発明
の効果と同様の効果を生む。また、本発明のうち第３６
の発明は、第３５の発明のハブにおいて、前記第二バイ
パス手段は前記ハブ側係合手段の表面に沿って形成され
た溝であるので、第３０の発明の効果と同様の効果を生
む。また、本発明のうち第３７の発明は、第３５の発明
のハブにおいて、前記第二バイパス手段は前記ハブ本体
に穿設された孔であるので、第３１の発明の効果と同様
の効果を生む。As described above, the first aspect of the present invention
Of the present invention has a syringe body such as a syringe body 2 to which a piston such as a piston 23 is slidably mounted, and is formed in a tubular shape at the tip of the syringe body through an injection needle introduction hole such as a hole 8a. In a hub such as a hub 9 for a syringe that is formed with a hub insertion hole such as the hub insertion hole 4b and is detachably inserted into the hub insertion hole, the hub is the hub insertion hole. A hub main body such as a tubular hub main body 90 which can be inserted into the hole and pulled out from the hub insertion hole into the syringe main body is provided, and the hub stop groove 10c or the seal rib is provided on the outer peripheral portion of the hub main body. 57, or a seal portion such as a fold portion 61 is formed in an annular shape so as to engage with the inner surface of the hub insertion hole, and one end of the end surface 11a or the like of the hub body is provided with an injection needle 21 or the like. A needle insertion hole, such as a needle insertion hole 12 into which an injection needle can be inserted, is provided with an arrow on the hub body. , B direction and the like in the axial direction, and a hub side engaging means such as a piston engaging hole 15 is provided at the other end of the end surface 10b of the hub body so as to be engageable with the piston and the needle insertion hole. Since the hub body and the hub insertion hole are formed so as to form a communication space between the hub body and the hub insertion hole,
It is possible to provide a hub that can be reliably sealed between the two by contacting via the hub part, can be easily attached to and detached from the hub insertion hole, and can exhibit a predetermined sealing performance. It is possible to smoothly and easily perform the operation of installing the hub and the operation of pulling the used injection needle into the syringe. In addition, in the second aspect of the present invention, since the hub of the first aspect of the invention is configured by forming the seal portion such as the hub stop groove 10c in the shape of a groove, in addition to the effect of the first aspect of the 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. The third aspect of the present invention is configured such that the hub of the first aspect of the invention is formed by forming the seal rib 57 or the seal portion such as the fold portion 61 in the form 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 the hole 8 at the tip.
A syringe hub can be freely attached to and detached from a syringe such as a syringe 100 having a syringe body such as a syringe body 2 having a hub insertion hole such as a hub insertion hole 4b formed through an injection needle introduction hole such as a. In the connection structure of the connected hubs, the hub body of the hub of the first invention is inserted into the hub insertion hole, and the hub insertion hole can be pulled out into the syringe body from the hub insertion hole. The hub stop rib 7d is attached to the inner peripheral surface such as the inner peripheral surface 7a of the hub insertion hole.
Alternatively, the seal groove 59 or a hub seal such as the inner peripheral surface 7a
And a hub stop groove 1 of the hub body.
0c, the seal rib 57, or the seal portion such as the fold portion 61 is provided in the form of being brought into contact with the hub seal portion at a predetermined contact pressure such as a predetermined seal pressure F1. In addition to the effect of the first aspect of the invention, the hub body and the hub insertion hole are in contact with each other via the seal portion, so that the two are reliably sealed and the hub is attached to and detached from the hub insertion hole. It can be carried out easily, and the work of assembling the syringe can be carried out efficiently and easily. Moreover, the hub can be pulled into the syringe with a small pulling force when the used injection needle is pulled into the syringe, and the used syringe can be smoothly and easily discarded. The fifth aspect of the present invention is the hole 8 at the tip.
A syringe hub can be freely attached to and detached from a syringe such as a syringe 100 having a syringe body such as a syringe body 2 having a hub insertion hole such as a hub insertion hole 4b formed through an injection needle introduction hole such as a. In a connection structure of connected hubs, the hub body of the hub of the second invention is inserted into the hub insertion hole, and the hub insertion hole can be pulled out into the syringe body from the hub insertion hole. A hub seal portion such as a hub stop rib 7d having a ring-shaped protrusion is provided on the inner peripheral surface such as the inner peripheral surface 7a of the hub insertion hole. Since the seal portion such as the hub stop groove 10c of the main body is provided so as to be in contact with the hub seal portion at a predetermined contact pressure such as a predetermined seal pressure F1, the effect of the second invention is provided. In addition, 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 in which a hub insertion hole such as a hub insertion hole 4b is 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, 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 provided with a predetermined seal pressure F1 with respect to the hub seal portion.
Since it is provided so as to be in contact and engaged with each other at a predetermined contact pressure such as, the same effect as the fourth invention can be exerted in addition to the effect of the third invention. A seventh aspect of the present invention is, in the hub connection structure according to the fifth or sixth aspect, the hub stop groove 10c or the width of the seal portion such as the seal rib 57 and the hub stop rib 7d, or Seal groove 5
Since the hub seal portion such as 9 has a different width, 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 is a point in the axial section of the hub. It is possible to bring them into contact with each other, and it is possible to exert a high degree of sealing performance as compared with the sealing 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 aspect of the invention is inserted into the hub insertion hole, is inserted into the hub insertion hole, and is detachably inserted and attached into the syringe body from the hub insertion hole. The hub seal portion such as the inner peripheral surface 7a is provided on the same surface as the inner peripheral surface 7a of the hub insertion hole, and the seal rib 57 of the hub body or the seal portion of the fold portion 61 is formed.
Since the hub portion is provided so as to be brought into contact with and engaged with the hub seal portion at a predetermined contact pressure such as a predetermined seal pressure F1, in addition to the effect of the third invention, it is the same as the fourth invention. The effect of can be exhibited. A ninth aspect of the present invention is the hub connection structure according to the fourth, fifth, sixth, or eighth aspect of the invention, 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 the hub connection structure according to the fourth, fifth, sixth, or eighth invention, wherein one or more slits 50 or the like are provided around the injection needle introduction hole of the syringe body. In addition to the effects of each invention, not only the hub can be easily inserted and installed from the hub insertion hole side by utilizing the elastic deformation of the slit, but also the hub insertion At times, it is possible to perform the operation with the piston attached to the syringe body, which can reduce the possibility that dust will enter the syringe body when the hub is inserted, which is hygienic. In addition, the eleventh to fourteenth inventions of the present invention include syringes such as the syringe 100 and hubs such as the hub 9 having the connection structures of the fourth to sixth and eighth inventions, and the syringe body, A piston 2 having a shape that axially closes the interior of the interior space 2a of the syringe body.
A piston such as 3 is provided movably in the axial direction with respect to the syringe body, and a hub engaging portion 31 that can engage with the hub side engaging means such as the piston engaging hole 15 of the hub. The piston side engaging means is provided so as to face the hub side engaging means, and an injection needle such as an injection needle 21 is provided in a needle insertion hole such as the needle insertion hole 12 of the hub. In addition to the effects of the fourth, fifth, sixth, and eighth inventions, it is possible to engage the hub with the piston-side engaging means of the piston after use and withdraw the needle together with the injection needle inside the syringe. Just by pushing and pulling the same piston as when operating a syringe, a used injection needle can be easily pulled into the inside of the syringe, making it easy for anyone to operate, and there is no risk of erroneous operation, providing high safety. . The fifteenth invention of the present invention is the syringe of the twelfth or thirteenth invention, wherein the width of the seal portion is different from the width of the hub seal portion. In addition, when the seal portion and the hub seal portion are engaged, the contact portion can be made into a point contact state in the axial cross section of the hub, and a high level of sealing performance can be achieved as compared with a surface contact type seal. Can be done. A sixteenth invention of the present invention is the syringe according to the eleventh, twelfth, thirteenth, or fourteenth invention, wherein the piston has a piston body such as a piston body 25 and an operating portion such as an outer pressing plate 27. Pressing plate 29, packing support portion 30, packing 33
Since it is configured to be breakable between the liquid pressing parts such as, in addition to the effects of each invention, by breaking the piston, the piston tip holding the injection needle inside the syringe can be inserted into the syringe tip. It can be kept in a state that it cannot be operated from the outside while it is held in the section, and it is highly safe in the subsequent disposal process. A seventeenth aspect of the present invention is the syringe of the sixteenth aspect, wherein the syringe main body is provided with a piston stopper such as a locking rib 3b, an inner pressing plate 29 of the piston, and a packing support portion 3.
In addition to the effect of the sixteenth invention, the liquid pressing portions such as 0 and packing 33 are formed so as not to come out from the syringe main body. Get out of the syringe body,
The used injection needle prevents the operator from being injured and is highly safe. The eighteenth aspect of the present invention
The inventions of 19 and 19 are the syringes of the 16th and 17th inventions, in which the piston body such as the piston body 25 of the piston is formed with a notch for breaking such as the notch 26, so that the effects of the respective inventions are provided. In addition, the breaking operation of the piston can be easily performed by using the notch. A twentieth invention of the present invention is the syringe according to the nineteenth invention, wherein the notch has an end portion such as an opening end portion 3a of the syringe body when the piston abuts on the piston stopper. In addition to the effect of the nineteenth aspect of the invention, the piston can be pulled until it hits the piston stopper, and the piston can be immediately broken off using the end portion. The storage and detention operations can be performed continuously, and efficient injection and disposal operations can be performed. The 21st invention of the present invention is the 11th, 12th or 13th invention.
Or, when assembling the syringe of the fourteenth invention, the hub is inserted into the hub insertion hole from the piston mounting side of the syringe body, and the hub is attached to the seal portion of the hub and the hub insertion hole. The hub seal portion is installed in a manner to elastically engage each other, the piston is inserted into the syringe, and the needle insertion hole of the hub is formed by inserting and connecting an injection needle. In addition to the effects of the invention, it is possible to assemble the hub by inserting it from the piston mounting side. The 22nd invention of the present invention is the 11th, 12th or 1st
When assembling the syringe of the third or fourteenth invention, 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 of the hub and the hub seal of the hub insertion portion.
Since it is installed in such a manner that elastically engages with each other, and the injection needle is inserted and connected to the needle insertion hole of the hub,
In addition to each effect, it is possible to do with the piston attached to the syringe body when inserting the hub, and it is possible to reduce the possibility of dust entering the syringe body when inserting the hub, which is hygienic. is there. A twenty-third aspect of the present invention is a hub in which a piston is inserted into the syringe and an injection needle is attached when the syringe of the eleventh or twelfth or thirteenth or fourteenth aspect of the invention is assembled. Is inserted into the hub insertion hole from the side of the injection needle introduction hole of the syringe body, and the hub is elastically coupled to the seal portion of the hub and the hub seal portion of the hub insertion portion. Since it was installed and configured to engage with, in addition to each effect,
When the hub is inserted, the piston can be attached to the syringe body, which reduces the possibility of dust entering the syringe body when the hub is attached, which is hygienic. Also, when the hub is inserted into the hub insertion hole, the injection needle has already been inserted into the hub, so avoid the extra work of installing the injection needle on the syringe that has already been assembled. The assembly work can be done quickly. The twenty-fourth aspect of the present invention is to form one or more slits around the injection needle introducing hole of the syringe body when assembling the syringe of the eleventh or twelfth or thirteenth or fourteenth aspect of the invention. Then, the piston is inserted into 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 Since the seal portion of the hub and the hub seal portion of the hub insertion portion are installed so as to be elastically engaged with each other, in addition to the respective effects, the piston is attached to the syringe when the hub is attached. It is possible to perform it while it is mounted on the main body, and it is possible to reduce the possibility that dust will enter the syringe main body when the hub is mounted, which is hygienic. Also, when the hub is inserted into the hub insertion hole, the injection needle has already been inserted into the hub, so avoid the extra work of installing the injection needle on the syringe that has already been assembled. The assembly work can be done quickly. Further, since the hub can be easily inserted and mounted from the hub insertion hole side by utilizing the elastic deformation of the slit, the hub insertion operation can be performed quickly and easily. The twenty-fifth aspect of the present invention is to form one or more slits around the injection needle introducing hole of the syringe body when assembling the syringe of the eleventh or twelfth or thirteenth or fourteenth aspect of the invention. Then, insert the piston into 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 seal portion of the hub and the hub. Hub seal of hub insertion part
Since it is installed in such a manner that elastically engages with each other, and the injection needle is inserted and connected to the needle insertion hole of the hub,
In addition to each effect, it is possible to do with the piston attached to the syringe body when inserting the hub, and it is possible to reduce the possibility of dust entering the syringe body when inserting the hub, which is hygienic. is there. Further, since the hub can be easily inserted and mounted from the hub insertion hole side by utilizing the elastic deformation of the slit, the hub insertion operation can be performed quickly and easily. The second aspect of the present invention
In the sixth aspect of the invention, the medium holding space 53 is provided inside the internal space 2a or the like.
A syringe such as a cylindrical syringe 100 in which a liquid holding space such as is formed is provided, and a hub such as a hub 9 is detachably inserted and provided in the syringe, and the syringe is placed facing the liquid holding space of the hub. An injection needle such as an injection needle 21 is provided on the side of the hub, and an opening such as an opening 17b is formed at the end of the hub such as an end 10b facing the liquid holding space of the syringe. The hub side engaging means such as the piston engaging hole 15 is provided in such a manner as to form a communicating space such as the piston engaging hole 15 and the communicating hole 13 that communicate with the liquid circulating hole such as the medium circulating hole 21a of the injection needle. , A piston such as a piston 23 for axially closing the inside of the syringe is provided in the syringe so as to be movable in the axial direction such as the arrow A and B directions with respect to the syringe.
A piston side engaging means such as a hub engaging portion 31 is provided on the piston so as to be inserted into and engageable with the hub side engaging means so as to face the hub side engaging means of the hub. The engaging means is formed by forming the first bypass means such as the groove 32 and the bypass hole 39 that communicate the communication space and the liquid holding space when the piston side engagement means comes into contact with the hub. Therefore, when the hub-side engaging means and the piston-side engaging means are engaged with each other during the operation of accommodating the injection needle after using the syringe, the liquid medicine remaining in the liquid holding space is pressed between the hub and the piston. However, the pressure-increased drug solution is differentially pressured and appropriately flows out to the liquid flow hole side of the injection needle through the first bypass means. The piston may be There does not work most, the operation of the piston is facilitated without requiring large force. The twenty-seventh aspect of the present invention is the syringe of the twenty-sixth aspect, wherein the first bypass means is a groove formed along the surface of the piston side engaging means. In addition to the effect, it becomes easy to form the first bypass means with respect to the piston side engaging means. A twenty-eighth invention of the present invention is the syringe according to the twenty-sixth invention, wherein the first bypass means is a hole formed in the piston-side engaging means, and therefore, in addition to the effects of the twenty-sixth invention. Thus, when the piston side engaging means comes into contact with the hub, the contact between the first bypass means and the hub can be eliminated, so that the first bypass means will not be blocked and the piston The operation is reliable and easy. A twenty-ninth invention of the present invention has a syringe such as a cylindrical syringe 100 in which a liquid holding space such as the medium holding space 53 is formed inside the inner space 2a and the like, and the hub 9 and the like are provided in the syringe. The hub is detachably inserted and provided, and an injection needle such as an injection needle 21 is provided on the side of the hub facing the liquid holding space, and the hub holds the liquid of the syringe of the hub. End 10b facing the space
A piston engagement in which a hub side engaging means such as a piston engagement hole 15 is connected to a liquid flow hole such as a medium flow hole 21a of the injection needle so as to form an opening such as an opening 17b at an end of the injection needle. The second bypass means such as a hub bypass groove 40, a hub bypass hole 41, and the like, which are provided so as to form a communication space such as the hole 15 and the flow hole 13, and which connect the liquid holding space and the communication space, are formed in the hub. The piston 2 has a shape that closes the inside of the syringe in the axial direction such as the arrow A and B directions.
Pistons such as 3 are provided so as to be movable in the axial direction with respect to the syringe, and piston-side engaging means such as a hub engaging portion 31 is provided on the piston so as to face the hub-side engaging means of the hub. Since it is configured to be insertably engageable with the hub side engaging means, when the hub side engaging means and the piston side engaging means are engaged at the time of storing the injection needle after using the syringe, The liquid chemical remaining in the liquid holding space is compressed between the hub and the piston, but the liquid chemical pressured up by the pressure is appropriately flowed out to the liquid flow hole side of the injection needle through the second bypass means due to the differential pressure. The pressure rise of the chemical liquid remaining in the liquid holding space is suppressed as low as possible. Therefore, the resistance of the pressure-increased chemical liquid hardly acts on the piston, and the operation of the piston becomes easy without requiring a large force. A thirtieth invention of the present invention is the syringe according to the twenty-ninth invention, wherein the second bypass means is a groove formed along the surface of the hub side engaging means. In addition to the effect, the second bypass means can be easily formed on the hub. The 31st invention of the present invention is the 2nd invention.
In the syringe of the ninth invention, since the second bypass means is a hole formed in the hub, in addition to the effect of the twenty-ninth invention, when the piston side engaging means comes into contact with the hub,
The contact between the second bypass means and the piston side engagement means can be eliminated, and therefore the second bypass means is not closed, so that the piston can be operated reliably and easily. The 32nd invention of the present invention is the 26th invention.
In the piston used in the syringe of the invention described above, the piston has a piston body such as a piston body 25, and the inside of the syringe can be axially closed at the distal end side of the piston body, and the inside of the syringe can be closed. A pressing portion such as an inner pressing plate 29, a packing supporting portion 30, and a packing 33, which can slide in the axial direction, is provided, and the distal end side of the pressing portion is insertably engageable with the hub side engaging means. Piston-side engaging means is provided, and when the piston-side engaging means comes into contact with the hub, the groove 32 and the bypass hole 3 that communicate the communication space with the liquid holding space are provided.
Since the first bypass means such as 9 is formed and configured, the second
In addition to the same effect as the effect of the sixth aspect of the invention, since the first bypass means is formed on the piston side, various hubs can be used properly according to the situation. A thirty-third aspect of the present invention is the piston of the thirty-second aspect, wherein the first bypass means is a groove formed along the surface of the piston side engaging means.
The 27th effect is produced in addition to the effect of the second invention. Also,
A thirty-fourth invention of the present invention is the piston of the thirty-second invention, wherein the first bypass means is a hole formed in the piston-side engagement means, and therefore, in addition to the effects of the thirty-second invention, The effect of the twenty-eighth invention is produced. A thirty-fifth aspect of the present invention is a hub such as a hub 9 for a syringe that is inserted and attached to a syringe such as a syringe 100 in which a piston such as the piston 23 is slidably mounted, wherein the hub is A hub body 9 that can be detachably inserted into the syringe
A needle insertion hole 1 having a hub body such as 0, into which an injection needle such as an injection needle 21 can be inserted at one end of the end portion 11a or the like of the hub body.
Needle insertion portions such as 2 are provided in the axial direction of the hub body such as the arrow A and B directions, and the hub body is provided with an end portion 1 of the hub body.
Hub side engaging means such as a piston engaging hole 15 in a form of forming an opening such as an opening 17b at the other end of 0b or the like, such as a piston engaging hole 15, a communicating hole 13 or the like communicating with the needle insertion portion. A hub that is provided so as to form a communication space, and connects the liquid holding space such as the medium holding space 53 inside the syringe to the communication space when the hub main body is inserted into the syringe. Since the second bypass means such as the bypass groove 40 and the hub bypass hole 41 is formed and configured, the same effect as the effect of the twenty-ninth invention is produced. The 36th aspect of the present invention
In the hub of the thirty-fifth invention, the second bypass means is a groove formed along the surface of the hub-side engaging means, and therefore, the same effect as the thirtieth invention is produced. A thirty-seventh aspect of the present invention is the hub of the thirty-fifth aspect, wherein the second bypass means is a hole bored in the hub body, and therefore, the same effect as that of the thirty-first aspect of the invention can be obtained. Give birth.
【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に示す注射器の全体図である。2 is an overall view of the syringe shown in FIG. 1. FIG.
【図３】図３は、図１に示す注射器のハブ係合部の挿入
部を図中の矢印Ｂ方向に見た図である。FIG. 3 is a view of the insertion portion of the hub engagement portion of the syringe shown in FIG. 1 as seen in the direction of arrow B in the figure.
【図４】図４は、図１に示す注射器のハブ挿着部を図中
の矢印Ｂ方向に見た図である。4 is a view of the hub insertion portion of the syringe shown in FIG. 1 viewed in the direction of arrow B in the figure.
【図５】図５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. 5 is a view showing the piston being broken off in the syringe shown in FIG. 1.
【図６】図６は、本発明による注射器のうち、ハブ側に
シールリブが形成され、ハブ挿入孔側にシール溝が形成
された注射器の一例を示した模式断面図である。FIG. 6 is a schematic cross-sectional view showing an example of the syringe according to 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７】図７は、本発明による注射器のうち、ハブ側に
シールリブが形成され、ハブ挿入孔側のハブシール部が
ハブ挿入孔の内周面に一致する形の注射器の一例を示し
た模式断面図である。FIG. 7 is a schematic diagram showing an example of the syringe of 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 matches the inner peripheral surface of the hub insertion hole. FIG.
【図８】図８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ール部がハブ
挿入孔の内周面に一致する形の注射器の一例を示した模
式断面図である。FIG. 8 shows an example of a syringe according to the present invention in which a fold portion 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. It is a schematic cross section.
【図９】図９は、本発明による注射器のうち、第一バイ
パス手段がバイパス孔である形の注射器の一例を示した
模式断面図である。FIG. 9 is a schematic cross-sectional view showing an example of a syringe according to the present invention in which the first bypass means is a bypass hole.
【図１０】図１０は、本発明による注射器のうち、第二
バイパス手段がハブバイパス溝である形の注射器の一例
を示した模式断面図である。FIG. 10 is a schematic cross-sectional view showing an example of the syringe according to the present invention in which the second bypass means is a hub bypass groove.
【図１１】図１１は、本発明による注射器のうち、第二
バイパス手段がハブバイパス孔である形の注射器の一例
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 of the present invention in which the second bypass means is a hub bypass hole.
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（ハブ挿着孔） ７ａ……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） １０ｃ……シ−ル部（ハブ止溝） １２……針挿入孔 １３……連通空間（流通孔） １５……連通空間、ハブ側係合手段（ピストン係合孔） １７ａ……表面（壁面） １７ｂ……開口部 ２１……注射針 ２１ａ……液流通孔（媒体流通孔） ２３……ピストン ２５……ピストン本体 ２６……切欠き ２７……操作部（外押圧板） ２９……液押圧部（内押圧板） ３０……液押圧部（パッキン支持部） ３１……ピストン側係合手段（ハブ係合部） ３１ｃ……表面（球面） ３２……第一バイパス手段（溝） ３３……液押圧部（パッキン） ３９……第一バイパス手段（バイパス孔） ４０……第二バイパス手段（ハブバイパス溝） ４１……第二バイパス手段（ハブバイパス孔） ５０……スリット ５３……液保持空間（媒体保持空間） 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 矢印Ａ、Ｂ方向……軸方向 Ｆ１……接触圧力（シール圧） 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 …… 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 surface) 10c ... Seal part (hub stop groove) 12 ... Needle insertion hole 13 ... Communication space (flow hole) 15 ... Communication space, hub side engagement means (piston engagement hole) 17a ... Surface (Wall) 17b ... Opening 21 ... Injection needle 21a ... Liquid flow hole (medium flow hole) 23 ... Piston 25 ... Piston body 26 ... Notch 27 ... Operating section (outer pressing plate) 29 ... ... Liquid pressing part (inner pressing plate) 30 ... Liquid pressing part (packing support part) 31 ... Piston side Coupling means (hub engaging portion) 31c ... Surface (spherical surface) 32 ... First bypass means (groove) 33 ... Liquid pressing portion (packing) 39 ... First bypass means (bypass hole) 40 ... Second By-pass means (hub bypass groove) 41 ... Second bypass means (hub bypass hole) 50 ... Slit 53 ... Liquid holding space (medium holding space) 57 ... Seal part (sea rib) 59 ... Hub seal − Seal part (seal groove) 61 …… Seal part (fold part) 90 …… Hub body 100 …… Syringe arrow A, B direction …… Axial direction F1 …… Contact pressure (seal pressure)
Claims (37)
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、 前記ハブ本体の他端に、ハブ側係合手段を、前記ピスト
ンと係合自在にかつ、前記針挿入孔との間で連通空間を
形成する形で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 an outer peripheral portion of the hub main body so as to engage with an inner surface of the hub insertion hole; and an injection needle is inserted into one end of the hub main body. A needle insertion hole that can be carried out is provided in the axial direction of the hub body, and at the other end of the hub body, a hub side engaging means is engageable with the piston and communicates with the needle insertion hole. A hub for a syringe that is formed and formed to form a space.
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 formed by annularly forming a hub seal portion on the inner peripheral surface of the hole and by providing the seal portion of the hub body with the hub seal portion in contact with each other at a predetermined contact pressure. Construction.
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. The connection structure of the hub configured and provided in.
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. The connection structure of the hub that is provided and configured.
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, and is detachably inserted into the syringe main body through the hub insertion hole. A hub seal portion is provided on the same surface as the inner peripheral surface of the hole, and the seal portion of the hub main body is provided in a form of being brought into contact engagement with the hub seal portion at a predetermined contact pressure. Connection structure.
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 having a connection structure according to claim 6 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。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.
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 syringe according to claim 11, 12 or 13 or 14, wherein a piston body of the piston is constructed so as to be capable of being broken between the operating portion and the liquid pressing portion.
を、前記ピストンの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 on the syringe body so that a liquid 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 breaking notch 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、 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。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. The seal portion and the hub seal portion of the hub insertion portion are installed so as to elastically engage each other, the piston is inserted into the syringe, and the injection needle is inserted into the needle insertion hole of the hub. A method for assembling a syringe configured by inserting and connecting.
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 so 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. 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 the hub with the injection needle attached is set to the injection needle introducing 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.
リンジを有し、 前記シリンジにハブを着脱自在に挿着して設け、 前記ハブの前記液保持空間に背向した側に注射針を接合
して設け、 前記ハブに、該ハブの前記シリンジの液保持空間に対向
した端部に開口部を形成する形でハブ側係合手段を、前
記注射針の液流通孔と連通した連通空間を形成する形で
設け、 前記シリンジに、該シリンジの内部を軸方向に閉塞する
形のピストンを、前記シリンジに対して軸方向に移動自
在に設け、 前記ピストンにピストン側係合手段を、前記ハブのハブ
側係合手段に対向する形で、該ハブ側係合手段に対して
挿入係合自在に設け、 前記ピストン側係合手段に、該ピストン側係合手段が前
記ハブと当接した際に、前記連通空間と前記液保持空間
を連通する第一バイパス手段を形成して構成した注射
器。26. A cylindrical syringe having a liquid holding space formed therein, wherein a hub is removably inserted into the syringe, and the syringe is provided on the side of the hub facing away from the liquid holding space. A needle is joined to the hub, and the hub side engaging means is connected to the liquid flow hole of the injection needle in the hub so that an opening is formed at an end of the hub facing the liquid holding space of the syringe. Provided in the form of forming a communication space, the syringe is provided with a piston for axially closing the interior of the syringe, the piston being movably provided in the axial direction with respect to the syringe, and the piston is provided with piston side engaging means. And provided so as to be inserted into and engageable with the hub-side engaging means so as to face the hub-side engaging means of the hub, and the piston-side engaging means contacts the hub. When in contact with each other, the communication space communicates with the liquid holding space. Syringe configured to form a first bypass means.
に沿って形成された溝である注射器。27. The syringe according to claim 26, wherein the first bypass means is a groove formed along a surface of the piston side engaging means.
された孔である注射器。28. The syringe according to claim 26, wherein the first bypass means is a hole formed in the piston side engaging means.
リンジを有し、 前記シリンジにハブを着脱自在に挿着して設け、 前記ハブの前記液保持空間に背向した側に注射針を接合
して設け、 前記ハブに、該ハブの前記シリンジの液保持空間に対向
した端部に開口部を形成する形でハブ側係合手段を、前
記注射針の液流通孔と連通した連通空間を形成する形で
設け、 前記ハブに、前記液保持空間と前記連通空間とを連通す
る第二バイパス手段を形成し、 前記シリンジに、該シリンジの内部を軸方向に閉塞する
形のピストンを、前記シリンジに対して軸方向に移動自
在に設け、 前記ピストンにピストン側係合手段を、前記ハブのハブ
側係合手段に対向する形で、前記ハブ側係合手段に対し
て挿入係合自在に設けて構成した注射器。29. A cylindrical syringe having a liquid holding space formed therein, wherein a hub is removably inserted into the syringe and is provided, and an injection is made on a side of the hub that is located in a direction opposite to the liquid holding space. A needle is joined to the hub, and the hub side engaging means is connected to the liquid flow hole of the injection needle in the hub so that an opening is formed at an end of the hub facing the liquid holding space of the syringe. Provided in the form of a communication space, the hub is formed with a second bypass means for communicating the liquid holding space with the communication space, and the piston is provided in the syringe so as to axially close the interior of the syringe. Is provided so as to be movable in the axial direction with respect to the syringe, and the piston-side engaging means is inserted into the hub-side engaging means so as to face the hub-side engaging means of the hub. Syringe that is freely installed and configured.
って形成された溝である注射器。30. The syringe according to claim 29, wherein the second bypass means is a groove formed along a surface of the hub side engaging means.
注射器。31. The syringe according to claim 29, wherein the second bypass means is a hole formed in the hub.
ストンにおいて、 前記ピストンはピストン本体を有し、 前記ピストン本体の先端側に、前記シリンジの内部を軸
方向に閉塞し得るとともに、前記シリンジの内部を軸方
向に摺動移動し得る押圧部を設け、 前記押圧部の先端側に、前記ハブ側係合手段に対して挿
入係合自在なるピストン側係合手段を設け、 前記ピストン側係合手段に、該ピストン側係合手段が前
記ハブと当接した際に、前記連通空間と前記液保持空間
を連通する第一バイパス手段を形成して構成したピスト
ン。32. The piston used in the syringe according to claim 26, wherein the piston has a piston body, and the inside of the syringe can be axially closed at the tip side of the piston body, and the syringe is provided. Is provided with a pressing portion capable of slidingly moving in the axial direction, and a piston-side engaging means that is insertably engageable with the hub-side engaging means is provided at the tip end side of the pressing portion. A piston configured by forming a first bypass means for communicating the communication space and the liquid holding space when the piston side engagement means contacts the hub.
に沿って形成された溝であるピストン。33. The piston according to claim 32, wherein the first bypass means is a groove formed along the surface of the piston side engaging means.
された孔であるピストン。34. The piston according to claim 32, wherein the first bypass means is a hole formed in the piston side engaging means.
ジに対して挿着される注射器用のハブにおいて、 前記ハブは、前記シリンジに着脱自在に挿着され得るハ
ブ本体を有し、 前記ハブ本体の一端に、注射針を挿入し得る針挿入部
を、前記ハブ本体の軸心方向に設け、 前記ハブ本体に、該ハブ本体の他端に開口部を形成する
形でハブ側係合手段を、前記針挿入部と連通した連通空
間を形成する形で設け、 前記ハブ本体に、該ハブ本体が前記シリンジに挿着され
た際に、前記シリンジ内部の液保持空間と前記連通空間
とを連通する第二バイパス手段を形成して構成したハ
ブ。35. A syringe hub, which is inserted into and attached to a syringe in which a piston is slidably mounted, wherein the hub has a hub body that can be detachably inserted into the syringe, A hub insertion means is provided at one end of the main body in which a needle insertion portion into which an injection needle can be inserted is provided in the axial direction of the hub main body, and an opening is formed at the other end of the hub main body in the hub main body. Is provided so as to form a communication space that communicates with the needle insertion portion, and when the hub body is inserted into the syringe, the liquid holding space inside the syringe and the communication space are formed in the hub body. A hub formed by forming a second bypass means communicating with each other.
って形成された溝であるハブ。36. The hub according to claim 35, wherein the second bypass means is a groove formed along a surface of the hub side engaging means.
あるハブ。37. The hub according to claim 35, wherein the second bypass means is a hole formed in the hub body.
Priority Applications (13)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5202643A JP2759910B2 (en) | 1993-07-23 | 1993-07-23 | Syringe |
| CA002126478A CA2126478A1 (en) | 1993-06-29 | 1994-06-22 | Hub for syringe, connecting structure of hub, syringe, piston, needle assembly unit, connecting structure between needle assembly unit and syringe, syringe of assembling syringe assembly assembly and method |
| EP94109617A EP0633036A1 (en) | 1993-06-29 | 1994-06-22 | Retractable needle syringe |
| AU65976/94A AU679521B2 (en) | 1993-06-29 | 1994-06-24 | Hub for syringe, connecting structure of hub, syringe, piston, needle assembly unit, connecting structure between needle assembly unit and syringe, syringe assembly and method of assembling syringe assembly |
| KR1019940014916A KR950000172A (en) | 1993-06-29 | 1994-06-27 | Hub for syringe, hub connection structure, syringe, piston, needle unit, tooth needle unit and syringe connection structure, syringe and syringe assembly method |
| TW083108315A TW287951B (en) | 1993-06-29 | 1994-09-09 | |
| TW084108858A TW278044B (en) | 1993-06-29 | 1994-09-09 | |
| US08/614,632 US5879339A (en) | 1993-06-29 | 1996-03-13 | Hub for syringe, connecting structure of hub, syringe, piston, needle assembly unit, connecting structure between needle assembly unit and syringe, syringe assembly and method of assembling syringe assembly |
| US08/667,858 US5788672A (en) | 1993-06-29 | 1996-06-20 | Hub for syringe, connecting structure of hub, syringe, piston, needle assembly unit, connecting structure between needle assembly unit and syringe, syringe assembly and method of assembling syringe assembly |
| US08/685,110 US5716341A (en) | 1993-06-29 | 1996-07-23 | Hub for syringe, connecting structure of hub, syringe, piston, needle assembly unit, connecting structure between needle assembly unit and syringe, syringe assembly and method of assembling syringe assembly |
| AU65811/96A AU691123B2 (en) | 1993-06-29 | 1996-09-24 | Hypodermic needle assembly for a syringe |
| AU12461/97A AU686963B2 (en) | 1993-06-29 | 1997-01-31 | Needle hub for disposable syringe and syringe assembly |
| AU39893/97A AU3989397A (en) | 1993-06-29 | 1997-10-02 | Syringe assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5202643A JP2759910B2 (en) | 1993-07-23 | 1993-07-23 | Syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0731681A true JPH0731681A (en) | 1995-02-03 |
| JP2759910B2 JP2759910B2 (en) | 1998-05-28 |
Family
ID=16460745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5202643A Expired - Fee Related JP2759910B2 (en) | 1993-06-29 | 1993-07-23 | Syringe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2759910B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0871031A (en) * | 1994-09-02 | 1996-03-19 | Olympus Optical Co Ltd | Medical appliance |
| WO1998048871A1 (en) * | 1997-04-25 | 1998-11-05 | Yoshikuni Saito | Syringe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854848U (en) * | 1981-10-08 | 1983-04-14 | テルモ株式会社 | Syringe |
| JPS58141155A (en) * | 1982-02-17 | 1983-08-22 | テルモ株式会社 | Syringe |
| JPS59160467A (en) * | 1983-02-21 | 1984-09-11 | ラジオメ−タ・アクチセルスカベツト | Liquid sampling apparatus |
| JPH0490766A (en) * | 1989-12-12 | 1992-03-24 | Michael L Haining | Subcutaneous injector having retractable needle |
| JPH06504923A (en) * | 1990-11-30 | 1994-06-09 | ヌジェンコ・プロプライアタリー・リミテッド | syringe unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2902214C2 (en) * | 1979-01-20 | 1984-12-13 | Nustep Trenndüsen Entwicklungs- und Patentverwertungsgesellschaft mbH & Co KG, 4300 Essen | Device for uranium enrichment using the separating nozzle method |
-
1993
- 1993-07-23 JP JP5202643A patent/JP2759910B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854848U (en) * | 1981-10-08 | 1983-04-14 | テルモ株式会社 | Syringe |
| JPS58141155A (en) * | 1982-02-17 | 1983-08-22 | テルモ株式会社 | Syringe |
| JPS59160467A (en) * | 1983-02-21 | 1984-09-11 | ラジオメ−タ・アクチセルスカベツト | Liquid sampling apparatus |
| JPH0490766A (en) * | 1989-12-12 | 1992-03-24 | Michael L Haining | Subcutaneous injector having retractable needle |
| JPH06504923A (en) * | 1990-11-30 | 1994-06-09 | ヌジェンコ・プロプライアタリー・リミテッド | syringe unit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0871031A (en) * | 1994-09-02 | 1996-03-19 | Olympus Optical Co Ltd | Medical appliance |
| WO1998048871A1 (en) * | 1997-04-25 | 1998-11-05 | Yoshikuni Saito | Syringe |
| US6196997B1 (en) | 1997-04-25 | 2001-03-06 | Yoshikuni Saito | Syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2759910B2 (en) | 1998-05-28 |
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