JP3120890U - Safety syringe - Google Patents
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- JP3120890U JP3120890U JP2006000740U JP2006000740U JP3120890U JP 3120890 U JP3120890 U JP 3120890U JP 2006000740 U JP2006000740 U JP 2006000740U JP 2006000740 U JP2006000740 U JP 2006000740U JP 3120890 U JP3120890 U JP 3120890U
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Abstract
【課題】組立てが簡単で精密に組み立て可能とした安全注射器を提供する。
【解決手段】係合ベース２のプラスチック製のスリーブ部品２１の下端外周側も、ゴム製の封止部品２２の外周面によって覆われており、前記係合ベース２が注射筒１の収束部１２に嵌合した時、弾性変形可能のゴム製の封止部品２２により、プラスチック製のスリーブ部品２１とゴム製の封止部品２１とが液密に結合され、これにより、一般の金型による射出成型のプラスチックのスリーブ部品２１と貫通孔１２１とが緊密に結合できない従来の加工上の問題点を解消できる。また、ゴム製の封止部品２２は、射出成型による外側面に突隆状の係止部２２４が形成され、該係止部２２４は、従来の周知の液漏れ防止用Ｏリングの機能を有し、Ｏリングと封止部品２２とが一体的に射出成型により成型されるので、組立工程における人的なバラツキ等による不具合を確実に防止できる。
【選択図】図１A safety syringe that can be easily assembled and can be assembled precisely.
An outer peripheral side of a lower end of a plastic sleeve part 21 of an engagement base 2 is also covered with an outer peripheral surface of a rubber sealing part 22, and the engagement base 2 is a converging part 12 of a syringe barrel 1. The plastic sleeve part 21 and the rubber sealing part 21 are liquid-tightly coupled to each other by the elastically deformable rubber sealing part 22, thereby allowing injection by a general mold. It is possible to solve the conventional processing problems in which the molded plastic sleeve part 21 and the through hole 121 cannot be tightly coupled. Further, the rubber sealing component 22 has a protrusion-like locking part 224 formed on the outer surface by injection molding, and the locking part 224 has a function of a conventional well-known liquid leakage prevention O-ring. In addition, since the O-ring and the sealing component 22 are integrally formed by injection molding, it is possible to reliably prevent problems due to human variations in the assembly process.
[Selection] Figure 1
Description
本考案は、安全注射器に関し、特に、組立てが簡単で精密な組み立てを可能とした安全注射器の係合ベースの改良に関する。 The present invention relates to a safety syringe, and more particularly, to an improvement in the engagement base of a safety syringe that enables easy and precise assembly.
従来の安全注射器は、注射器の係合ベース単元構造をより簡単にして、組立てが容易で、そして、加工工程を低減するために、係合ベース単元が、スリーブ部品と封止部品にからなっている。当該スリーブ部品には、硬質のプラスチックの外嵌合体と、当該外嵌合体の内部に嵌合されるゴム材質である内嵌合体とがあり、内嵌合体の内側に形成される内部へ突出して伸ばす係合部により、押圧棒の先端のほぞが推し込まれると、係止結合関係が形成され、上記の内、外嵌合体からなるスリーブ部品と封止部品とにより、簡単な構造設計で、押圧棒と係合ベース単元とが互いに係止結合され、これにより、注射針が注射筒の内部へ引き戻されると、不良業者が其れを回収して再利用することを防止できるようになっている。 In the conventional safety syringe, in order to make the engaging base unit structure of the syringe simpler, easy to assemble, and to reduce the processing steps, the engaging base unit is composed of a sleeve part and a sealing part. Yes. The sleeve component includes an outer fitting body made of hard plastic and an inner fitting body made of a rubber material fitted into the outer fitting body, and protrudes to the inside formed inside the inner fitting body. When the tenon at the tip of the pressing rod is pushed in by the extending engaging portion, a locking connection relationship is formed, and among the above, the sleeve part and the sealing part made of the outer fitting body, with a simple structural design, The push bar and the engagement base unit are locked and connected to each other, so that when the injection needle is pulled back into the syringe barrel, it is possible to prevent a defective contractor from collecting and reusing it. Yes.
上記の従来の注射器の係合ベース単元は、プラスチックである外嵌合体と、ゴムである内嵌合体とにより、簡単な構造設計で、生産や組立てが容易で、加工工程を低減できる利点があるが、次の欠点がある。
１．結合性が悪い。直接に覆うように射出されるプラスチックの外嵌合体とゴム内嵌合体とを採用することは、プラスチックとゴムの弾性係数が異なるため、射出により覆うことは結合安定性が悪いし、また、内嵌合体において、内側と下端が、外嵌合体を覆うように結合するため、内外嵌合体の間の結合安定性がより不足する。
２．密合性が悪い。上記の説明のように、内嵌合体が、内側により外嵌合体と結合するため、結合安定性が不足で、また、針体を強い力で内嵌合体の係合部を通すと、結合性が不足である内嵌合体が内部に縮み、これにより、内外嵌合体が結合される底部において、微細の隙間が生成し、注射過程において、薬液の漏出の要因になる。
３．組立てが簡単ではない。上記の従来のものは、当該外嵌合体が一般にＰＰ材質からなるため、外嵌合体が、同じＰＰ材質である針筒に組み立てる時、両者の間において、より良い精度でないと、緊密的に結合できない。そのため、金型のコストが高くなり、また、収率の向上が難しい。
The above-mentioned conventional engagement base unit of a syringe has the advantage that it is easy to produce and assemble with a simple structure design and can reduce the processing steps by using an outer fitting body made of plastic and an inner fitting body made of rubber. However, there are the following drawbacks.
1. Poor connectivity. Adopting a plastic outer fitting body and a rubber inner fitting body that are injected so as to cover directly, because the elastic modulus of plastic and rubber is different, covering by injection has poor bonding stability, and In the fitting body, since the inner side and the lower end are joined so as to cover the outer fitting body, the coupling stability between the inner and outer fitting bodies is further insufficient.
2. Poor consistency. As described above, the inner fitting body is coupled to the outer fitting body on the inner side, so that the coupling stability is insufficient, and if the needle body is passed through the engaging portion of the inner fitting body with a strong force, the coupling property is reduced. The inner fitting body that is insufficient is shrunk to the inside, and as a result, a fine gap is generated at the bottom portion to which the inner and outer fitting bodies are joined, which causes leakage of the drug solution during the injection process.
3. Assembly is not easy. In the above conventional one, the outer fitting body is generally made of PP material. Therefore, when the outer fitting body is assembled into a needle tube made of the same PP material, the two are tightly coupled unless they have better accuracy. Can not. This increases the cost of the mold and makes it difficult to improve the yield.
全体から言うと、従来の、プラスチック製であるスリーブ部品とゴム材からなる内嵌合体とからなる係合ベースの空間設計は、改善すべきところがあり、また、ゴム材質とプラスチック材質との構成による係合ベースにおいて、コスト低減することは、業界にとって重要なことである。 Overall, the space design of the conventional engagement base composed of the sleeve part made of plastic and the inner fitting body made of rubber material should be improved, and it depends on the configuration of the rubber material and the plastic material. Reducing costs on an engagement basis is important to the industry.
本考案の主な目的は、プラスチックのスリーブ部品とゴムの封止部品との被覆結合関係をより安定的にする係合ベースと、その係合ベースを有する安全注射器を提供する。 SUMMARY OF THE INVENTION The main object of the present invention is to provide an engagement base that provides a more stable coating connection between a plastic sleeve part and a rubber sealing part, and a safety syringe having the engagement base.
本考案に係る請求項１の安全注射器は、中空の筒体からなり、先端に前記筒体の開口内径より小さい内径の貫通孔が形成された収束部を有し、該収束部後方に液装填用の収納室を設けた注射筒と、前記収束部内の空間部に装填される係合ベースと、該係合ベースの先端に装着される注射針と、前記注射筒の後端開口より挿入される押圧棒を備えた安全注射器であって、前記係合ベースは、内部中央に貫通孔を有するスリーブ部品と、該スリーブ部品の後端部を覆うように一体成型により射出成形されたゴム製の封止部品とからなり、前記スリーブ部品の先端部は前記収束部の空間部に係合され、且つ後端部は環状側壁に形成した上部開口の環状溝を有する封止部品に装着されると共に、前記環状側壁の底部には中央開口側に突出する係合部が設けられており、且つ前記環状側壁の上部外周面には突隆状の係止部が形成されており、前記注射針は、針ベース先端部に装着された針体によって形成され、前記針ベースの後端部が前記スリーブ部品の先端に結合されるようになっており、前記押圧棒は、先端部に前記注射筒内に挿入されて液密状態を保ち摺動するピストンが形成されると共に、該ピストンの先端には前記係合部に係合するためのほぞが設けられていることを特徴とする。 The safety syringe according to claim 1 of the present invention is composed of a hollow cylinder, and has a converging part formed with a through-hole having an inner diameter smaller than the inner diameter of the opening of the cylinder, and a liquid is loaded behind the converging part. A syringe barrel provided with a storage chamber, an engagement base loaded in a space in the converging portion, a syringe needle attached to the tip of the engagement base, and a rear end opening of the syringe barrel. A safety syringe provided with a pressing rod, wherein the engagement base is made of a rubber part that is injection-molded by integral molding so as to cover a sleeve part having a through hole in the center of the inside and a rear end portion of the sleeve part. The sleeve part is engaged with the space of the converging part, and the rear end part is attached to a sealing part having an annular groove in the upper opening formed in the annular side wall. The bottom of the annular side wall has an engaging portion that protrudes toward the center opening. And a protruding locking portion is formed on the upper outer peripheral surface of the annular side wall, and the injection needle is formed by a needle body attached to a needle base tip, and the needle base The rear end of the sleeve part is coupled to the front end of the sleeve component, and the pressing rod is inserted into the front end of the syringe barrel to form a piston that slides while maintaining a liquid-tight state. A tenon for engaging with the engaging portion is provided at the tip of the piston.
請求項２の考案は、請求項１に記載の安全注射器において、 前記スリーブ部品は、硬質のプラスチック製の材料で成形され、先端部中央に突出柱を有し、該突出柱と先端部の内壁面により前記針ベースが嵌合されるための凹み嵌合部が形成され、前記突出柱の軸方向には前記スリーブ部品の後端部と連通する連通孔が形成されてなり、前記スリーブ部品の後端部に設けられた前記封止部品の突隆状の係止部が前記収束部内の空間部内壁面に形成された段差部に接合するようになっていることを特徴とする。
請求項３の考案は、請求項１又は２に記載の安全注射器において、前記封止部品の環状側壁の底部に形成した係合部は、底部内面及び開口軸線が前記スリーブ部品の軸線方向に対し傾斜して形成されていることを特徴とする。
The invention of claim 2 is the safety syringe according to claim 1, wherein the sleeve part is formed of a hard plastic material, and has a protruding column in the center of the tip, and the inside of the protruding column and the tip A recess fitting portion for fitting the needle base is formed by the wall surface, and a communication hole communicating with the rear end portion of the sleeve component is formed in the axial direction of the protruding column. A protrusion-like locking part of the sealing part provided at the rear end part is joined to a step part formed on the inner wall surface of the space in the converging part.
The invention of claim 3 is the safety syringe according to claim 1 or 2, wherein the engaging portion formed at the bottom of the annular side wall of the sealing part has an inner surface of the bottom and an opening axis with respect to the axial direction of the sleeve part. It is formed to be inclined.
本考案によれば、異なる材料属性を有するプラスチックのスリーブ部品とゴムの封止部品とが、安定的に結合され、前記係合ベース２のプラスチック製のスリーブ部品２１の下端外周側も、ゴム製の封止部品２２の外周面によって覆われており、前記係合ベース２が注射筒１の収束部１２に嵌合した時、弾性変形可能のゴム製の封止部品２２により、プラスチック製のスリーブ部品２１とゴム製の封止部品２１とが液密に結合され、これにより、一般の金型による射出成型のプラスチックのスリーブ部品２１と貫通孔１２１とが緊密に結合できない従来の加工上の問題点を解消できる。
また、前記スリーブ部品の外側に直接に一体成型によりゴム材が覆われているため、スリーブ部品を注射筒に組み立てた時、精度に対する要求が低下されても、ゴム材の塑性により緊密に結合できる状態を確保することが出来ると共に、製品の歩留まり収率の向上や金型コストの低減が実現される。
According to the present invention, the plastic sleeve part and the rubber sealing part having different material attributes are stably coupled, and the lower end outer peripheral side of the plastic sleeve part 21 of the engagement base 2 is also made of rubber. When the engagement base 2 is fitted to the converging portion 12 of the syringe barrel 1, the plastic sleeve is formed by the elastically deformable rubber sealing component 22. The part 21 and the rubber sealing part 21 are liquid-tightly coupled, and thus, the conventional plastic molding sleeve part 21 and the through-hole 121 cannot be tightly coupled to each other by a general mold. Can eliminate the point.
In addition, since the rubber material is covered directly on the outside of the sleeve component by integral molding, even when the requirement for accuracy is reduced when the sleeve component is assembled into a syringe, it can be tightly coupled by the plasticity of the rubber material. The state can be secured, and the yield rate of the product can be improved and the die cost can be reduced.
また、本考案のゴム製の封止部品２２は、射出成型による外側面に突隆状の係止部２２４が形成され、該係止部２２４は、従来の周知の液漏れ防止用Ｏリングの機能を有し、Ｏリングと封止部品２２とが一体的に射出成型により成型されるので、組立工程における人的なバラツキ等による不具合を確実に防止できる。
更にまた、係合ベース２２が注射筒１内に引き戻されるとき、自動的に、偏移して引き戻されるようにして、注射針３が再度露出することを防止することができる効果を有するものである。
Further, the rubber sealing part 22 of the present invention has a protruding locking portion 224 formed on the outer side surface by injection molding, and the locking portion 224 is a conventional well-known O-ring for preventing liquid leakage. Since the O-ring and the sealing component 22 are integrally formed by injection molding, it is possible to reliably prevent problems due to human variations in the assembly process.
Furthermore, when the engagement base 22 is pulled back into the syringe barrel 1, it automatically shifts and is pulled back, so that the injection needle 3 can be prevented from being exposed again. is there.
以下、本考案の安全注射器について、本考案を実施するための最良の形態について図面をもとに詳細に説明する。 Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings for the safety syringe of the present invention.
本考案の安全注射器は、図１に示すように、注射筒１と、該注射筒１内に実装される係合ベース２と、該係合ベース２に嵌合連結される注射針３と、前記注射筒１内に挿入され前記注射筒１の内壁面と直線的に摺動する関係を有するように先端部にピストン部４０を有する押圧棒４とを備えている。 As shown in FIG. 1, the safety syringe of the present invention includes a syringe barrel 1, an engagement base 2 mounted in the syringe barrel 1, a syringe needle 3 fitted and connected to the engagement base 2, A pressing rod 4 having a piston portion 40 at the tip is provided so as to have a relationship of being inserted into the syringe 1 and linearly sliding with the inner wall surface of the syringe 1.
前記注射筒１は、中空円筒体からなる注射筒１の内部には液装填用の収納室１１が設けられ、先端部を先細状に形成した収束部１２が形成され、前記収束部１２には前記収納室１１と連通して開口径寸法がより小さい貫通孔１２１が設けられている。また、前記貫通孔１２１と連続する空間部１３が設けられるとともに、前記空間部１３の内壁面には、環状に階段状の段差部１３１が形成されている。 The syringe barrel 1 is provided with a storage chamber 11 for liquid loading inside the syringe barrel 1 made of a hollow cylindrical body, and a converging portion 12 having a tapered tip is formed. A through hole 121 communicating with the storage chamber 11 and having a smaller opening diameter is provided. In addition, a space portion 13 that is continuous with the through hole 121 is provided, and a stepped step portion 131 is formed in an annular shape on the inner wall surface of the space portion 13.
前記係合ベース２は、硬質のプラスチック製の材質で形成されたスリーブ部品２１と封止部品２２とから構成される。前記スリーブ部品２１は、内部先端部の中央において、予め設定された径寸法を有する突出柱２１１が形成され、該突出柱２１１は、軸方向の後端部に口径がより大きい収納空間２１５と連通するチャンネル（連通孔）２１２が形成されている。また、前記突出柱２１１の外周壁面とスリーブ部品２１の内壁面との間には、後述の針ベース３１を収嵌合連結するための凹み嵌合部２１３が構成されている。 The engagement base 2 includes a sleeve part 21 and a sealing part 22 formed of a hard plastic material. The sleeve component 21 is formed with a protruding column 211 having a preset diameter at the center of the inner tip, and the protruding column 211 communicates with the storage space 215 having a larger diameter at the rear end in the axial direction. A channel (communication hole) 212 is formed. Further, a recessed fitting portion 213 for fitting and connecting a needle base 31 described later is formed between the outer peripheral wall surface of the protruding column 211 and the inner wall surface of the sleeve component 21.
また、前記係合ベース２の後端部には封止部品２２が設けられており、弾性を有するゴム材質を射出成型により、直接スリーブ部品２１の後端部を覆うように一体成型されたものである。一体射出成型により形成された前記封止部品２２は環状側壁に形成した上部開口のほぼＵ字状の環状溝２２５が形成されており、この環状溝２２５にスリーブ部品２１の後端部を嵌合固着することで、プラスチック製のスリーブ部品２１とゴム製の封止部品２２との結合が安定的に且つ密着性を持って固着される。 Further, a sealing component 22 is provided at the rear end portion of the engagement base 2, and an elastic rubber material is integrally molded so as to directly cover the rear end portion of the sleeve component 21 by injection molding. It is. The sealing part 22 formed by integral injection molding has a substantially U-shaped annular groove 225 having an upper opening formed in an annular side wall, and the rear end of the sleeve part 21 is fitted into the annular groove 225. By fixing, the connection between the plastic sleeve part 21 and the rubber sealing part 22 is stably and firmly fixed.
図３によく見られるように、前記封止部品２２の内壁面と底面との連続面には、前記収納空間２１５の中心方向へ向かって突設する係合部２２１が形成されている。前記係合部２２１は、前記押圧棒４のほぞ４１と係合するようになっているため、注射器の使用完了後、逆方向に押圧棒４を引き戻す時、前記係合ベース２を注射筒１の収納室１１の中に引き込むことができる。
また、前記封止部品２２の外側壁面には、前記段差部１３１に対応する突隆状の係止部２２４が形成されており、前記段差部１３１と突隆状の係止部２２４の係合により、本実施例の係合部２２１が構成される。
As is often seen in FIG. 3, an engagement portion 221 that protrudes toward the center of the storage space 215 is formed on the continuous surface of the inner wall surface and the bottom surface of the sealing component 22. Since the engaging portion 221 is adapted to engage with the tenon 41 of the pressing rod 4, when the pressing rod 4 is pulled back in the reverse direction after the use of the syringe is completed, the engaging base 2 is moved to the syringe barrel 1. Can be retracted into the storage chamber 11.
Further, a protruding locking portion 224 corresponding to the stepped portion 131 is formed on the outer wall surface of the sealing component 22, and the stepped portion 131 and the protruding locking portion 224 are engaged with each other. Thus, the engaging portion 221 of this embodiment is configured.
前記注射針３は、針ベース３１と該針ベース３１の先端部に固定される針体３２とからなり、前記針体３２の外部はカバー３３によって覆われている。そして、前記注射針３は、前記係合ベース２の先端部に形成した凹み嵌合部２１３に嵌合固定される。 The injection needle 3 includes a needle base 31 and a needle body 32 fixed to the distal end portion of the needle base 31, and the outside of the needle body 32 is covered with a cover 33. The injection needle 3 is fitted and fixed to a recess fitting portion 213 formed at the distal end portion of the engagement base 2.
前記押圧棒４は、先端部に前記注射筒１内に挿入されて液密状態を保ち摺動するピストン部４０が形成されると共に、該ピストン部４０の先端には前記係合部２２に係合するためのほぞ４１が設けられており、該ほぞ４１が、前記係合部２２１に係合し、使用後の係合ベース２を引き戻すことができる。 The pressing rod 4 is formed with a piston portion 40 which is inserted into the syringe barrel 1 and slides in a liquid-tight state at the tip portion, and is engaged with the engagement portion 22 at the tip of the piston portion 40. A tenon 41 for mating is provided, and the tenon 41 can be engaged with the engagement portion 221 to pull back the engagement base 2 after use.
以上のように構成された本考案の安全注射器を組み立てる時には、図２、図３に示すように注射針３の針ベース３１を前記スリーブ部品２１の凹み嵌合部２１３に嵌入し、また、前記係合ベース２を、注射筒１の収納室１１の下方に位置する開口から挿入して、前記スリーブ部品２１の先端部を収束部１２の貫通孔１２１に挿入し、且つ前記収束部１２の空間部１１の段差部１３１に、前記スリーブ部品２１の後端部に装着した封止部品２２を緊密に結合する。
前記スリーブ部品２１の後端部は、前記空間部１１の段差部１３１において、一体成型のゴム製の封止部品２２の外側壁面に形成した突隆状の係止部２２４が圧接装着されて、これにより、注射器の使用過程において、収納室１１内の液薬が漏れることが防止できる。そして、前記押圧棒４を収納室１１の開口から押し込むことで完全な注射器の使用前の状態が準備される。
When assembling the safety syringe of the present invention configured as described above, the needle base 31 of the injection needle 3 is fitted into the recess fitting portion 213 of the sleeve part 21 as shown in FIGS. The engagement base 2 is inserted from an opening located below the storage chamber 11 of the syringe barrel 1, the distal end portion of the sleeve component 21 is inserted into the through hole 121 of the converging portion 12, and the space of the converging portion 12 The sealing component 22 attached to the rear end portion of the sleeve component 21 is tightly coupled to the step portion 131 of the portion 11.
At the rear end portion of the sleeve part 21, a protrusion-like locking part 224 formed on the outer wall surface of the integrally molded rubber sealing part 22 is press-fitted and mounted at the step part 131 of the space part 11. Thereby, it can prevent that the liquid medicine in the storage chamber 11 leaks in the use process of a syringe. And the state before use of a complete syringe is prepared by pushing in the said pressing rod 4 from opening of the storage chamber 11. FIG.
図４と図５に示すように、注射処置の終了後は、前記押圧棒４のほぞ４１が前記係合部２２１に係止されているため、押圧棒４が逆方向に引張られると、注射針３は、注射筒１の収納室１１の内部に引き込まれる。この状態で前記押圧棒４に横方向からの圧力を加えることで容易に押圧棒４を折損することが出来、再使用のできない状態とすることができる。 As shown in FIGS. 4 and 5, after the injection treatment is finished, the tenon 41 of the pressing bar 4 is locked to the engaging portion 221, so that when the pressing bar 4 is pulled in the opposite direction, the injection is performed. The needle 3 is pulled into the storage chamber 11 of the syringe barrel 1. In this state, the pressure bar 4 can be easily broken by applying a pressure from the lateral direction to the pressure bar 4, and the pressure bar 4 cannot be reused.
前記係合ベース２のプラスチック製のスリーブ部品２１は、下端外周側も、ゴム製の封止部品２２の外周面によって覆われ、前記係合ベース２が注射筒１の収束部１２に嵌合する時、弾性変形可能のゴム製の封止部品２２により、プラスチック製のスリーブ部品２１とゴム製の封止部品２１とが液密に結合され、これにより、一般の金型による射出成型のプラスチックのスリーブ部品２１と貫通孔１２１とが緊密に結合できない従来の加工上の問題点を解消できる。 The plastic sleeve part 21 of the engagement base 2 is also covered with the outer peripheral surface of the rubber sealing part 22 on the outer peripheral side of the lower end, and the engagement base 2 is fitted to the converging part 12 of the syringe barrel 1. At this time, the plastic sleeve part 21 and the rubber sealing part 21 are liquid-tightly coupled by the elastically deformable rubber sealing part 22, and thereby, the injection molding plastic of a general mold is used. It is possible to solve the conventional processing problems in which the sleeve part 21 and the through hole 121 cannot be tightly coupled.
本考案のゴム製の封止部品２２は、射出成型による外側壁面に突隆状の係止部２２４が形成され、該係止部２２４は、従来の周知の漏出防止用Ｏリングの機能を有する。したがって、本考案は、Ｏリングと封止部品２２とが一体的に射出成型により形成されるため、従来のようなＯリングの組立て工程においての人的なバラツキ等を、確実に防止できる。 The rubber sealing part 22 of the present invention has a protruding locking part 224 formed on the outer wall surface by injection molding, and the locking part 224 has the function of a conventional well-known leakage preventing O-ring. . Therefore, according to the present invention, since the O-ring and the sealing component 22 are integrally formed by injection molding, it is possible to reliably prevent human variation and the like in the conventional assembly process of the O-ring.
図６は、本考案に係る係合ベース２の他の実施態様の変形例を示すものであり、この変形例において、上記の実施例と異なるところは、係合ベース２２が注射筒１内に引き戻されるとき、自動的に偏移して引き戻されるようにして、注射針３が再度露出することを防止できるようにしたものである。 FIG. 6 shows a modification of another embodiment of the engagement base 2 according to the present invention. In this modification, the engagement base 22 is placed in the syringe barrel 1 except for the above-described embodiment. When the needle is pulled back, the needle 3 is automatically shifted and pulled back to prevent the injection needle 3 from being exposed again.
変形例によるスリーブ部品２１の後端部を覆うゴム製の封止部品２２は、前記封止部品２２の環状側壁の底部に形成した係合部２２１ａが、底部内面及び開口軸線が前記スリーブ部品２１の軸線方向に対し傾斜して形成されたものであって、内壁面から内部へ対向して伸びる係合部２２１ａが傾斜面を有する構成である。したがって、押圧棒４のほぞ４１が傾斜面となった係合部２２１ａの開口に入り込むと、ほぞ４１が内側面の単一側に対して、外へ推す力を印加し、注射針３が、貫通孔１２１の先端部から引き込まれて注射筒１の収納室１１内に縮むと図７に示すように偏移して収納され、注射針３が再び前記貫通孔１２１から外方に突出するようなことがなくなる。 The rubber sealing component 22 covering the rear end portion of the sleeve component 21 according to the modified example has an engaging portion 221a formed at the bottom of the annular side wall of the sealing component 22, and the inner surface of the bottom portion and the opening axis are the sleeve component 21. The engaging portion 221a extending from the inner wall surface to the inside has an inclined surface. Therefore, when the tenon 41 of the pressing bar 4 enters the opening of the engaging portion 221a having an inclined surface, the tenon 41 applies a force to thrust outward against a single side of the inner surface, and the injection needle 3 When retracted from the distal end portion of the through-hole 121 and contracted in the storage chamber 11 of the syringe barrel 1, it is shifted and stored as shown in FIG. 7 so that the injection needle 3 protrudes outward from the through-hole 121 again. There is nothing wrong.
１ 注射筒
１１ 収納室
１２ 収束部
１２１ 貫通孔
１３ 空間部
１３２ 段差部
２ 係合ベース
２１ スリーブ部品
２１１ 突出柱
２１２ チャンネル（連通孔）
２１３ 凹み嵌合部
２１５ 収納空間
２２ 封止部品
２２１，２２１ａ 係合部
２２４ 突隆状の係止部
３ 注射針
３１ 針ベース
３２ 針体
３３ カバー
４ 押圧棒
４０ ピストン部
４１ ほぞ
DESCRIPTION OF SYMBOLS 1 Injection cylinder 11 Storage chamber 12 Converging part 121 Through-hole 13 Space part 132 Step part 2 Engagement base 21 Sleeve component 211 Projection pillar 212 Channel (communication hole)
213 Recess fitting part 215 Storage space 22 Sealing part 221, 221a Engagement part 224 Protruding locking part 3 Injection needle 31 Needle base 32 Needle body 33 Cover
4 Press rod 40 Piston part 41 Mortise
Claims (3)
前記係合ベースは、内部中央に貫通孔を有するスリーブ部品と、該スリーブ部品の後端部を覆うように一体成型により射出成形されたゴム製の封止部品とからなり、前記スリーブ部品の先端部は前記収束部の空間部に係合され、且つ後端部は環状側壁に形成した上部開口の環状溝を有する封止部品に装着されると共に、前記環状側壁の底部には中央開口側に突出する係合部が設けられており、且つ前記環状側壁の上部外周面には突隆状の係止部が形成されており、
前記注射針は、針ベース先端部に装着された針体とによって形成され、前記針ベースの後端部が前記スリーブ部品の先端に結合されるようになっており、
前記押圧棒は、先端部に前記注射筒内に挿入されて液密状態を保ち摺動するピストン部が形成されると共に、該ピストン部の先端には前記係合部に係合するためのほぞが設けられていることを特徴とする安全注射器。 An injection cylinder comprising a hollow cylinder, having a converging part formed with a through-hole having an inner diameter smaller than the inner diameter of the opening of the cylinder at the tip, and having a storage chamber for liquid loading behind the converging part; A safety syringe comprising an engagement base loaded in a space in the converging portion, an injection needle attached to a tip of the engagement base, and a pressing rod inserted from a rear end opening of the syringe barrel,
The engagement base includes a sleeve part having a through hole in the center of the inside, and a rubber sealing part that is injection-molded by integral molding so as to cover a rear end portion of the sleeve part. The portion is engaged with the space portion of the converging portion, and the rear end portion is attached to a sealing part having an annular groove of an upper opening formed in the annular side wall, and the bottom portion of the annular side wall is on the center opening side. A protruding engaging part is provided, and a protruding locking part is formed on the upper outer peripheral surface of the annular side wall,
The injection needle is formed by a needle body attached to a tip end portion of a needle base, and a rear end portion of the needle base is coupled to a tip end of the sleeve component,
The pressing rod has a piston portion that is inserted into the syringe barrel and slides in a liquid-tight state at the tip portion, and a tenon for engaging the engagement portion at the tip of the piston portion. The safety syringe characterized by being provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006000740U JP3120890U (en) | 2006-02-07 | 2006-02-07 | Safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006000740U JP3120890U (en) | 2006-02-07 | 2006-02-07 | Safety syringe |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2007033406A Continuation JP2007209765A (en) | 2007-02-14 | 2007-02-14 | Safe injector |
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| JP3120890U true JP3120890U (en) | 2006-04-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010504106A (en) * | 2006-08-03 | 2010-02-12 | ベクトン・ディキンソン・アンド・カンパニー | Removable needle syringe with reduced dead space |
-
2006
- 2006-02-07 JP JP2006000740U patent/JP3120890U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010504106A (en) * | 2006-08-03 | 2010-02-12 | ベクトン・ディキンソン・アンド・カンパニー | Removable needle syringe with reduced dead space |
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