JP5936814B2 - Syringe needle cover - Google Patents

Syringe needle cover Download PDF

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JP5936814B2
JP5936814B2 JP2010236747A JP2010236747A JP5936814B2 JP 5936814 B2 JP5936814 B2 JP 5936814B2 JP 2010236747 A JP2010236747 A JP 2010236747A JP 2010236747 A JP2010236747 A JP 2010236747A JP 5936814 B2 JP5936814 B2 JP 5936814B2
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syringe
needle
peripheral wall
slit
needle cover
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JP2012085918A (en
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飯塚　茂雄
茂雄 飯塚
當麻　徹
當麻　　徹
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Description

本発明は注射器の針カバーに関する。   The present invention relates to a needle cover of a syringe.

注射器には使用者の安全確保等の目的でその針を被覆する針カバーが装着させている。針カバーの一般的な形状としてはサック状をなし、比較的剛性を備えた合成樹脂等で形成されている。   The syringe is provided with a needle cover that covers the needle for the purpose of ensuring the safety of the user. The general shape of the needle cover is a sack shape and is formed of a synthetic resin or the like having a relatively high rigidity.

針カバーは未使用時には予め針に装着されており、使用時に外して使用し、また、使用後には再び装着して注射器ともども廃棄するのが一般的である。従って、通常では使用時に外し、使用後に装着する一回の着脱で済むが、これらの着脱の際に指先への針刺し事故が生じているが、その点を考慮して、針刺し事故の防止を目的とした使用済注射器への針カバー装着方法が提案がされている。（例えば、特許文献１参照）   The needle cover is attached to the needle in advance when not in use, and is used by removing it when in use. Further, after use, it is attached again and discarded together with the syringe. Therefore, it is usually removed at the time of use and can be attached and detached once after use, but there is a needle stick accident to the fingertip during these attachments and removals. A method for attaching a needle cover to a used syringe has been proposed. (For example, see Patent Document 1)

上記特許文献１の発明では、注射器針に装着する針カバーの大径部と緊密に装着可能な径を有する孔部を備えた防護鍔を用意し、この防護鍔を外部からアクセス可能な形態で貯蔵装置に所要個数貯蔵しておき、予め針カバーの装着されている使用前注射器を貯蔵装置に挿入して針カバーと防護鍔とを緊密に装着させ、しかる後注射器から針カバーを外して注射器を使用し、使用済の注射器に再び防護鍔付きの針カバーを装着する。   In the invention of the above-mentioned Patent Document 1, a protective rod provided with a hole having a diameter that can be tightly attached to a large-diameter portion of a needle cover attached to a syringe needle is prepared, and the protective rod is accessible from the outside. Store the required number in the storage device, insert the pre-use syringe pre-attached with the needle cover into the storage device, tightly attach the needle cover and protective rod, then remove the needle cover from the syringe and inject the syringe And attach the needle cover with the protective rod again to the used syringe.

上記特許文献１に記載の針カバーは、針刺し事故を防止できる優れたものではあるが、別部材としての防護鍔を必要とし、また、その貯蔵装置を必要とするものであり、取り扱いが煩雑となり、設置場所の必要も生じる。   The needle cover described in Patent Document 1 is an excellent one that can prevent a needle stick accident, but requires a protective gutter as a separate member, and also requires a storage device, which makes handling complicated. Also, the need for installation location arises.

この様な点を考慮して、本出願人は注射器の針カバーを提案している。（例えば、特許文献２参照）   In view of these points, the applicant has proposed a needle cover for a syringe. (For example, see Patent Document 2)

特許文献２に記載された針カバーは、注射器の先端部に側方より嵌着して針を被覆する針カバーであって、下部を、注射器本体先端部に強制的に嵌合させる嵌着部とし、上部を、注射器本体より突設した針を収容する針収容部とした開環筒状部を備え、針収容部の前部開口を、針の強制的な押圧により出入り可能な針挿入口を備えた閉塞壁で閉塞して構成している。   The needle cover described in Patent Document 2 is a needle cover that is fitted to the distal end portion of the syringe from the side to cover the needle, and the fitting portion that forcibly fits the lower portion to the distal end portion of the syringe main body. A needle insertion port that includes an open cylindrical portion whose upper portion is a needle accommodating portion that accommodates a needle protruding from the syringe body, and the front opening of the needle accommodating portion can be moved in and out by forced pressing of the needle It is configured to be closed with a closed wall provided with.

特開２００１−２２４６８６号公報Japanese Patent Laid-Open No. 2001-224686 特開２００９−２８４９４８号公報JP 2009-284948 A

特許文献２に記載された針カバーは、注射器の先端部に側方より嵌着して針を被覆することができ、また、取り外す際にも側方に取り外すことができるため、針で指を刺すという事故の発生を防ぐことができる。また、注射器に対して側方から押圧することで弾性を備えた嵌着部を嵌合させるとともに、針を強制的に押圧して挿通させる針挿入口を備えているので、着脱も極めて容易である等の優れたものである。   The needle cover described in Patent Document 2 can be fitted to the tip of the syringe from the side to cover the needle, and can also be removed from the side when removing the needle cover. The occurrence of an accident of stabbing can be prevented. In addition, it has a needle insertion port that allows the needle to be inserted by forcibly pressing the needle while fitting the elastic fitting part by pressing against the syringe from the side. It is excellent.

本発明はこの特許文献２に記載された針カバーを更に改良したものであり、簡単な構造で取り扱いが便利であり、しかも従前通りの針刺し事故の防止を確実に行える注射器の針カバーを提案する。   The present invention is a further improvement of the needle cover described in Patent Document 2, and proposes a needle cover for a syringe that is simple in structure and convenient to handle, and that can reliably prevent a conventional needle stick accident. .

第１の手段として、
注射器Ｂの先端部に周壁10の基端部を嵌着して注射器Ｂ先端部より突出した針33を被覆する針カバーＡであって、
側方から針33を挿通させるためのスリット17を周壁10の基端部に備えるとともに、
スリット17への針33の案内をする案内板18を周壁10外面のスリット17の一縁部より外方へ突設し、
スリット17から針33を挿通した後先端部を押し込んで注射器Ｂを周壁10の基端部に嵌着する如く構成し、
上記スリット17は、注射器の針の突出方向から見て、周壁10の内周面上の一点Pから当該点Ｐを通過する周壁10の直径方向の中心線Ｏと直角に延びる直線Ｃの方向に周壁10を貫設されており、
上記案内板15は、上記直線Ｃに沿ってスリットの貫通方向と同方向に突設されてなる。 As a first means,
A needle cover A covering the needle 33 protruding from the distal end of the syringe B by fitting the proximal end of the peripheral wall 10 to the distal end of the syringe B;
With a slit 17 for inserting the needle 33 from the side at the base end of the peripheral wall 10,
A guide plate 18 for guiding the needle 33 to the slit 17 is projected outward from one edge of the slit 17 on the outer surface of the peripheral wall 10,
After inserting the needle 33 from the slit 17, the distal end is pushed in and the syringe B is configured to be fitted to the proximal end of the peripheral wall 10.
The slit 17 is seen from the protruding direction of the needle of the syringe in the direction of a straight line C extending from a point P on the inner peripheral surface of the peripheral wall 10 at a right angle to the diametrical centerline O of the peripheral wall 10 passing through the point P. Peripheral wall 10 is penetrated ,
The guide plate 15 protrudes along the straight line C in the same direction as the slit penetration direction .

第２の手段として、以下の通り構成した。即ち、前記第１の手段に於いて、注射器Ｂの先端部の外径より周壁10の内径を小径に形成して、注射器Ｂの先端部の嵌着時に周壁10基端部が拡開する如く構成した。   The second means is configured as follows. That is, in the first means, the inner diameter of the peripheral wall 10 is made smaller than the outer diameter of the distal end portion of the syringe B, and the proximal end portion of the peripheral wall 10 is expanded when the distal end portion of the syringe B is fitted. Configured.

第３の手段として、以下の通り構成した。即ち、第１の手段又は第２の手段に於いて、先端部外周に放射状の係合リブ35を突設した注射器Ｂに対して使用し、各係合リブ35の外面に内面を圧接係合する周方向複数の係止突部16を横設し、各係止突部16間にそれぞれ縦突条15を縦設した。 The third means was configured as follows. That is, in the first means or the second means, it is used for the syringe B in which the radial engagement rib 35 is projected on the outer periphery of the tip portion, and the inner surface is press-engaged with the outer surface of each engagement rib 35. A plurality of locking protrusions 16 in the circumferential direction are provided horizontally, and vertical protrusions 15 are provided vertically between the locking protrusions 16, respectively.

本発明によれば、注射器Ｂの針33を一旦側方からスリット17を介して挿通した後、注射器Ｂの先端部を押し込んで、注射器Ｂの先端部を周壁10の基端部に嵌着するため、針33のスリット17挿通と注射器先端部の周壁基端部への嵌合を別々に行なわれて円滑な挿通及び嵌合を行え、また、注射器Ｂの先端部が嵌合する針カバーＡの周壁10下端部はスリット17により僅かに開環されているだけであるため注射器先端部の確実な嵌合が可能である。また、スリット17への針33の案内をする案内板18を周壁10外面に突設しているため、針33のスリット17への導入が容易でありこの点からも取り扱い操作が容易となる。更に、注射器Ｂから取り外す際はそのまま注射器Ｂを抜き出せばよくこの点でも取り扱い操作が容易である。また、その構造は簡単であり、合成樹脂により一体の成形が可能である。しかも従前通りの針刺し事故の防止を確実に行える。   According to the present invention, the needle 33 of the syringe B is once inserted from the side through the slit 17, and then the distal end portion of the syringe B is pushed in so that the distal end portion of the syringe B is fitted to the proximal end portion of the peripheral wall 10. Therefore, the insertion of the needle 17 into the slit 17 and the fitting of the distal end portion of the syringe to the proximal end of the peripheral wall can be performed separately to perform smooth insertion and fitting, and the needle cover A to which the distal end portion of the syringe B is fitted. Since the lower end of the peripheral wall 10 is only slightly opened by the slit 17, it is possible to securely fit the tip of the syringe. Further, since the guide plate 18 for guiding the needle 33 to the slit 17 protrudes from the outer surface of the peripheral wall 10, it is easy to introduce the needle 33 into the slit 17, and the handling operation is also easy from this point. Furthermore, when removing from the syringe B, the syringe B may be pulled out as it is, and the handling operation is easy also in this respect. Moreover, the structure is simple and can be integrally molded with a synthetic resin. Moreover, the conventional needle stick accident can be reliably prevented.

注射器Ｂの先端部の外径より周壁10の内径を小径に形成して、注射器Ｂの先端部の嵌着時に周壁10基端部が拡開する如く構成した場合には、針カバーＡ内へ針33を挿通後、先端部を押し込んだ際に注射器先端部と針カバー周壁基端部との所定位置での固定状態がより強固となり、不必要な位置までの先端部の押し込みを確実に防止でき、より安全性の向上を図れる。   When the inner diameter of the peripheral wall 10 is made smaller than the outer diameter of the distal end portion of the syringe B and the proximal end portion of the peripheral wall 10 is expanded when the distal end portion of the syringe B is fitted, the needle cover A is inserted. After inserting the needle 33, when the tip is pushed in, the fixed state of the syringe tip and the needle cover peripheral wall base end in a predetermined position becomes stronger, and the push of the tip to an unnecessary position is surely prevented. It is possible to improve safety.

案内板18を、周壁10外面のスリット17の一縁部より外方へ突設した場合には、案内板18の内面に針33を当接させて摺動させるという極めて簡単な操作でスリット17内への針33の導入を行え、取り扱いがより便利となる。   When the guide plate 18 protrudes outward from one edge portion of the slit 17 on the outer surface of the peripheral wall 10, the slit 17 can be easily operated by causing the needle 33 to come into contact with the inner surface of the guide plate 18 and sliding. The needle 33 can be introduced into the inside, and handling becomes more convenient.

注射器の針の突出方向から見てスリット17の一端縁を通る周壁の中心線に対して直角な方向に、周壁10を貫通するスリット17を穿設し、案内板18を、スリット17の上記穿設方向の延長方向へ突設した場合には、案内板18とスリット17とが同一平面上に連設されているため、針33の移動がよりスムースに行えて、更に取り扱いが便利となる。 A slit 17 penetrating the peripheral wall 10 is formed in a direction perpendicular to the center line of the peripheral wall passing through one edge of the slit 17 when viewed from the protruding direction of the needle of the syringe, and the guide plate 18 is inserted into the slit 17 above. When projecting in the direction of extension of the installation direction, the guide plate 18 and the slit 17 are continuously provided on the same plane. Therefore, the needle 33 can be moved more smoothly, and handling becomes more convenient.

案内板18を周壁10外周に沿って延設し、先端に突設した係合突部22を周壁10の対向位置に設けた係止段部21に係合可能に構成し、注射器Ｂ先端部の針カバー周壁10基端部への嵌着時に周壁10の拡開を規制して係合する如く構成した場合には、注射器Ｂ先端部の針カバー周壁10基端部への嵌着時に確実に所定位置に注射器先端部が嵌着され、更なる安全性の向上を図れる。   The guide plate 18 extends along the outer periphery of the peripheral wall 10, and the engaging protrusion 22 protruding from the tip is configured to be engageable with a locking step 21 provided at a position opposite to the peripheral wall 10. If the expansion of the peripheral wall 10 is restricted and engaged when the needle cover is fitted to the proximal end of the needle cover 10, the distal end of the syringe B is securely attached to the proximal end of the needle cover 10. The tip of the syringe is fitted at a predetermined position, and the safety can be further improved.

先端部外周に放射状の係合リブ35を突設した注射器Ｂに対して使用し、各係合リブ35の外面に内面を圧接係合する周方向複数の係止突部16を横設し、各係止突部16間にそれぞれ縦突条15を縦設した場合には、注射器Ｂの先端部の針カバー周壁10の基端部内への嵌合係止がより行いやすく、また、嵌合後の相互の回動を防止することもできる。   A plurality of locking projections 16 in the circumferential direction, which are used for a syringe B projecting radial engagement ribs 35 on the outer periphery of the distal end, and press-engage the inner surface to the outer surface of each engagement rib 35, When the vertical ridges 15 are provided vertically between the locking protrusions 16, it is easier to engage and lock the distal end portion of the syringe B into the proximal end portion of the needle cover peripheral wall 10. It is also possible to prevent subsequent mutual rotation.

注射器の針カバーの半断面図である。（実施例１）It is a half cross-sectional view of the needle cover of the syringe. Example 1 注射器の針カバーの平面図である。（実施例１）It is a top view of the needle cover of a syringe. Example 1 注射器の針カバーの底面図である。（実施例１）It is a bottom view of the needle cover of a syringe. Example 1 注射器に装着した状態の針カバーの要部縦断面図である。（実施例１）It is a principal part longitudinal cross-sectional view of the needle cover of the state with which the syringe was mounted | worn. Example 1 注射器の針カバーの半断面図である。（参考例）It is a half cross-sectional view of the needle cover of the syringe. ( Reference example ) 注射器の針カバーの平面図である。（参考例）It is a top view of the needle cover of a syringe. ( Reference example ) 図６の周壁が拡開された状態の平面図である。（参考例）It is a top view in the state where the peripheral wall of Drawing 6 was expanded. ( Reference example )

以下、本発明の形態を図面を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１乃至図４は針カバーの一例を示す。針カバーＡは図４に示す如き注射器Ｂの先端部に嵌着するもので、合成樹脂により形成され、周壁10の上端縁より頂壁11を延設した下端開口の有頂筒状をなしている。また、周壁10の上部はテ−パ部12を介して縮径部10ａに形成しており、縮径部10ａ外周には周方向複数の縦リブ13を縦設している。更に、テーパ部12下方の周壁10外周には帯状突部14が周設されている。また、テ−パ部12と帯状突部14との間の周壁10内周には周方向複数の縦突条15を突設しており、各縦突条15間には係止突部16をそれぞれ突設している。   1 to 4 show an example of a needle cover. The needle cover A is fitted to the distal end portion of the syringe B as shown in FIG. 4 and is formed of a synthetic resin. The needle cover A has a top-bottomed cylindrical shape with a top wall 11 extending from the top edge of the peripheral wall 10. Yes. Further, the upper portion of the peripheral wall 10 is formed in the reduced diameter portion 10a through the taper portion 12, and a plurality of circumferential ribs 13 are vertically provided on the outer periphery of the reduced diameter portion 10a. Further, a belt-like protrusion 14 is provided around the outer periphery of the peripheral wall 10 below the tapered portion 12. A plurality of circumferential ridges 15 are provided on the inner periphery of the peripheral wall 10 between the taper portion 12 and the belt-like projection 14, and a locking projection 16 is provided between the longitudinal ridges 15. Are protruding from each other.

更に、周壁10の基端部にはスリット17を縦設している。スリット17は、注射器Ｂの針33を側方から挿通させるためのもので、針33を押し込むことで挿通が可能であればよく、その幅と長さは特に限定されない。本例では注射器Ｂの針より若干狭い幅を有しているが針33の幅よりも大きい横幅であっても或いは横幅ゼロで端面相互が接触していてもよい。但し、スリットという名称からもわかるように極めて大きい横幅は考慮されない。本例では、周壁10下端より帯状突部14の上方で、係止突部16の下方位置までの丈を有するスリット17を穿設している。具体的には、図３において、周壁１０の内周面上に点Ｐをとると、点Ｐから同点を通る周壁10の直径方向の中心線Ｏと直角に延びる直線Ｃの方向へ、周壁10及び帯状突部14を貫通するスリット17を貫設している。 Further, a slit 17 is provided vertically at the base end portion of the peripheral wall 10. The slit 17 is for allowing the needle 33 of the syringe B to be inserted from the side, as long as it can be inserted by pushing the needle 33, and the width and length thereof are not particularly limited. In this example, the width is slightly narrower than the needle of the syringe B, but the width may be larger than the width of the needle 33 or the end faces may be in contact with each other with zero width. However, as can be seen from the name of slit, a very large width is not considered. In this example, a slit 17 having a length from the lower end of the peripheral wall 10 to the position below the locking protrusion 16 is formed above the belt-shaped protrusion 14. Specifically, in FIG. 3, when a point P is taken on the inner peripheral surface of the peripheral wall 10, the peripheral wall 10 extends in the direction of a straight line C extending perpendicularly to the diametrical centerline O of the peripheral wall 10 passing from the point P. In addition, a slit 17 penetrating the belt-like protrusion 14 is provided.

また、スリット17への針33の案内をする案内板18を備えている。本例に於ける案内板18は、図１乃至図３に示されている如く帯状突部14の部分に突設しており、帯状突部14の外面のスリット17の一方縁部より、上記したスリット17の貫設方向を延長した方向、即ちスリットの１７の一端縁を通る周壁１０の中心線と直交する方向（前述の点Ｐを通る直線Ｃの方向）に突設している。 Further, a guide plate 18 for guiding the needle 33 to the slit 17 is provided. As shown in FIGS. 1 to 3, the guide plate 18 in the present example protrudes from the band-shaped protrusion 14 and is formed from one edge of the slit 17 on the outer surface of the band-shaped protrusion 14. The slit 17 is provided so as to extend in the extending direction, that is, in a direction perpendicular to the center line of the peripheral wall 10 passing through one end edge of the slit 17 (direction of the straight line C passing through the point P described above).

また、本例では、針カバーＡの周壁10の内径を注射器Ｂの先端部の外径より小径に形成しており、注射器Ｂの先端部の嵌着時に周壁10基端部が拡開する如く構成している。その際スリット17の存在で拡開が容易に行える。但し、この様な構成を備えるものに限らず、上記周壁10の内径と先端部外径が略同径であって、注射器Ｂの先端部の嵌着時に周壁10基端部が拡開しない様に構成しても良い。   Further, in this example, the inner diameter of the peripheral wall 10 of the needle cover A is formed smaller than the outer diameter of the distal end portion of the syringe B, and the proximal end portion of the peripheral wall 10 is expanded when the distal end portion of the syringe B is fitted. It is composed. At that time, the presence of the slit 17 allows easy expansion. However, the present invention is not limited to such a configuration, and the inner diameter of the peripheral wall 10 and the outer diameter of the distal end are substantially the same, and the proximal end of the peripheral wall 10 does not expand when the distal end of the syringe B is fitted. You may comprise.

上記の如く構成した針カバーＡを使用する場合について説明する。図４は注射器Ｂに針カバーＡを装着した例を示し、この場合の注射器Ｂは、先端に小径部30を備えた本体31と、小径部30外方の螺筒に螺着させて小径部30外周に下部を嵌着させた針取付部材32と、針取付部材32の先端に装着された針33と、本体31内を摺動して本体31内の液を針33を介して注出するプランジャ34とを備えている。針取付部材32の上端部外周には周方向複数の係合リブ35を縦設している。   A case where the needle cover A configured as described above is used will be described. FIG. 4 shows an example in which the needle cover A is attached to the syringe B. In this case, the syringe B is screwed into a main body 31 having a small-diameter portion 30 at the tip and a screw tube outside the small-diameter portion 30 to be small-diameter portion. 30 Needle mounting member 32 with the lower part fitted to the outer periphery, needle 33 mounted at the tip of needle mounting member 32, and sliding in main body 31 to dispense liquid in main body 31 through needle 33 And a plunger 34. On the outer periphery of the upper end portion of the needle mounting member 32, a plurality of circumferential engagement ribs 35 are provided.

そして、針カバーＡの案内板18に針33の先端部を当接させてスライドさせ、スリット17を介して針カバーＡ内に挿入し、しかる後、注射器Ｂの先端部を押し込んで針カバーＡの基端部内に嵌着することができる。その際、注射器Ｂの各係合リブ35外面が係止突部16の内面に摺動して密嵌し、また、各縦突条15により各係合リブ35の相対回動を防止し、牽いては針カバーＡの注射器Ｂに対する相対回動を防止している。また、注射器Ｂの先端部の外径が針カバーＡの内径より小さく形成されているため、具体的には、各係合リブ35外面より周壁10の内周面の径が小さいため、周壁10は拡開される。但し、その径差は必要に応じて適宜選択し、この場合には注射器Ｂ上端部の針カバー周壁10内下端部へのピッタリした嵌着が得られればよく、それ程大きな拡径を必要としない。   Then, the tip end of the needle 33 is brought into contact with the guide plate 18 of the needle cover A and is slid and inserted into the needle cover A through the slit 17, and then the tip end of the syringe B is pushed into the needle cover A. It can be fitted in the base end portion. At that time, the outer surface of each engagement rib 35 of the syringe B slides and tightly fits on the inner surface of the locking projection 16, and each vertical protrusion 15 prevents relative rotation of each engagement rib 35. By checking, relative rotation of the needle cover A with respect to the syringe B is prevented. Further, since the outer diameter of the distal end portion of the syringe B is formed smaller than the inner diameter of the needle cover A, specifically, since the diameter of the inner peripheral surface of the peripheral wall 10 is smaller than the outer surface of each engagement rib 35, the peripheral wall 10 Will be expanded. However, the difference in diameter is appropriately selected as necessary. In this case, it is only necessary to obtain a perfect fit between the upper end of the syringe B and the lower end of the peripheral wall 10 of the needle cover, and a large expansion is not required. .

取り外す際には、例えば、針カバーＡ及び本体31を掴んでそのまま引き出せば良い。   When removing, for example, the needle cover A and the main body 31 may be grasped and pulled out as they are.

図５乃至図７は本発明の参考例を示し、本例に於いては、帯状突部14のスリット17形成位置縁部より突出部20を突設してその一側端に係止段部21を形成している。また、案内板18は周壁10外周に沿って延設し、対向位置の係止段部21に係合可能な係合突部22を先端に突設している。更に具体的には、帯状突部14外面のスリット17の縁部より、帯状突部14の突出部20外面に沿って、針33の挿通が可能な所定の間隔をあけて延設しており、先端に係止段部21と係合が可能な係合突部22を突設している。 5 to 7 show a reference example of the present invention . In this example, a projecting portion 20 is projected from the edge of the slit 17 forming position of the belt-like projecting portion 14, and a locking step portion is provided at one end thereof. 21 is formed. In addition, the guide plate 18 extends along the outer periphery of the peripheral wall 10 and has an engaging protrusion 22 at the tip that can engage with the engaging stepped portion 21 at the opposite position. More specifically, it extends from the edge of the slit 17 on the outer surface of the belt-like protrusion 14 along the outer surface of the protrusion 20 of the belt-like protrusion 14 with a predetermined interval through which the needle 33 can be inserted. An engaging protrusion 22 that can engage with the locking step portion 21 is provided at the tip.

係止段部21と係合突部22とは、針カバーＡを注射器Ｂに装着前の状態では、図６に示す如く非係合で注射器Ｂの針33が容易に挿通できる状態にある。この場合、係合突部22と係止段部21との隙間が針33の太さより小さい場合でも、例えば針33により係合突部22を押圧することで案内板18が外方へ弾性変形して容易に案内板18と突出部20との間に針33を挿入させることができる。   The locking step 21 and the engaging protrusion 22 are in a state in which the needle 33 of the syringe B can be easily inserted without being engaged as shown in FIG. 6 before the needle cover A is attached to the syringe B. In this case, even when the gap between the engagement protrusion 22 and the locking step 21 is smaller than the thickness of the needle 33, for example, the guide plate 18 is elastically deformed outward by pressing the engagement protrusion 22 with the needle 33, for example. Thus, the needle 33 can be easily inserted between the guide plate 18 and the protrusion 20.

一方、本例の場合も上記図１の例と同様、注射器Ｂの先端部の外径より周壁10の内径を小径に形成して、注射器Ｂの先端部の嵌着時に周壁10基端部が拡開する如く構成している。その際本例の場合には、図７に示す如く、周壁10の拡開に伴って案内板18の係合突部22が係止段部21に係合してそれ以上の拡開を防止する如く構成している。そして、注射器Ｂの先端部が針カバーＡの周壁10下端部に嵌着した際にはピッタリとフィットする。その他の構成は図１の例と同様であるため、同符号を付して説明を省略する。   On the other hand, in the case of this example as well, as in the example of FIG. 1 above, the inner diameter of the peripheral wall 10 is formed smaller than the outer diameter of the distal end portion of the syringe B, and It is configured to expand. In this case, as shown in FIG. 7, as the peripheral wall 10 expands, the engaging projection 22 of the guide plate 18 engages with the locking step portion 21 to prevent further expansion. It is configured as shown. And when the front-end | tip part of the syringe B fits in the lower end part of the surrounding wall 10 of the needle cover A, it fits perfectly. The other configuration is the same as that of the example of FIG.

この場合の作用に関しては、図６に於いて、係合突部22と係止段部21の間から針33を挿通させて、案内板18と突出部20との間及びスリット17を介して針カバーＡ内に挿入し、しかる後、注射器Ｂの先端部を押し込んで針カバーＡの基端部内に嵌着することができる。その際、注射器Ｂの各係合リブ35外面が係止突部16の内面に摺動して密嵌し、また、各縦突条15により各係合リブ35の相対回動を防止し、牽いては針カバーＡの注射器Ｂに対する相対回動を防止する。また、各係合リブ35外面より周壁10の内周面の径が小さいため、周壁10は拡開されるが、係合突部22が係止段部21に係合して拡開は防止され、その際注射器先端部が針カバー周壁基端部にピッタリと嵌合する。   With respect to the operation in this case, in FIG. 6, the needle 33 is inserted from between the engaging projection 22 and the locking step 21, and between the guide plate 18 and the protruding portion 20 and through the slit 17. The needle cover A can be inserted into the needle cover A, and then the tip of the syringe B can be pushed into the base cover of the needle cover A. At that time, the outer surface of each engagement rib 35 of the syringe B slides and tightly fits on the inner surface of the locking projection 16, and each vertical protrusion 15 prevents relative rotation of each engagement rib 35. In check, the needle cover A is prevented from rotating relative to the syringe B. Further, since the diameter of the inner peripheral surface of the peripheral wall 10 is smaller than the outer surface of each engagement rib 35, the peripheral wall 10 is expanded, but the engagement protrusion 22 engages with the locking step portion 21 to prevent the expansion. In this case, the tip of the syringe fits perfectly with the proximal end of the needle cover peripheral wall.

Ａ…針カバー
10…周壁、10ａ…縮径部、11…頂壁、12…テーパ部、13…縦リブ、14…帯状突部、
15…縦突条、16…係止突部、17…スリット、18…案内板、20…突出部、21…係止段部、
22…係合突部
Ｂ…注射器
30…小径部、31…本体、32…針取付け部材、33…針、34…プランジャ、35…係合リブ
Ｐ…周壁内周面上の点 Ｏ…点Ｐを通過する中心線
Ｃ…点Ｐから中心線と直角の方向へ延びる直線 A ... Needle cover
10 ... peripheral wall, 10a ... reduced diameter part, 11 ... top wall, 12 ... taper part, 13 ... vertical rib, 14 ... strip-shaped protrusion,
15 ... Vertical projection, 16 ... Locking protrusion, 17 ... Slit, 18 ... Guide plate, 20 ... Projection, 21 ... Locking step,
22 ... engagement projection B ... syringe
30 ... small diameter portion, 31 ... main body, 32 ... needle mounting member, 33 ... needle, 34 ... plunger, 35 ... engaging rib
P ... Point on the inner peripheral surface of the peripheral wall O ... Center line passing through the point P
C ... A straight line extending from point P in a direction perpendicular to the center line

Claims (3)

注射器（Ｂ）の先端部に周壁（10）の基端部を嵌着して注射器（Ｂ）先端部より突出した針（33）を被覆する針カバー（Ａ）であって、
側方から針（33）を挿通させるためのスリット（17）を周壁（10）の基端部に備えるとともに、
スリット（17）への針（33）の案内をする案内板（18）を周壁（10）外面のスリット（17）の一縁部より外方へ突設し、
スリット（17）から針（33）を挿通した後先端部を押し込んで注射器（Ｂ）を周壁（10）の基端部に嵌着する如く構成し、
上記スリット(17)は、注射器の針の突出方向から見て、周壁(10)の内周面上の一点(Ｐ)から当該点(Ｐ)を通過する周壁(10)の直径方向の中心線(Ｏ)と直角に延びる直線(Ｃ)の方向に周壁(10)を貫設されており、
上記案内板(15)は、上記直線(Ｃ)に沿ってスリットの貫通方向と同方向に突設されてなる、ことを特徴とする注射器の針カバー。 A needle cover (A) covering the needle (33) protruding from the tip of the syringe (B) by fitting the base end of the peripheral wall (10) to the tip of the syringe (B),
A slit (17) for inserting the needle (33) from the side is provided at the proximal end of the peripheral wall (10), and
A guide plate (18) for guiding the needle (33) to the slit (17) is projected outward from one edge of the slit (17) on the outer wall (10),
After inserting the needle (33) through the slit (17), the distal end is pushed in and the syringe (B) is configured to be fitted to the proximal end of the peripheral wall (10),
The slit (17) is a center line in the diametrical direction of the peripheral wall (10) passing through the point (P) from one point (P) on the inner peripheral surface of the peripheral wall (10) when viewed from the protruding direction of the needle of the syringe. The peripheral wall (10) is penetrated in the direction of the straight line (C) extending at right angles to (O) ,
The needle cover of the syringe, wherein the guide plate (15) is provided so as to protrude in the same direction as the slit penetration direction along the straight line (C) . 注射器（Ｂ）の先端部の外径より周壁（10）の内径を小径に形成して、注射器（Ｂ）の先端部の嵌着時に周壁（10）基端部が拡開する如く構成した請求項１記載の注射器の針カバー。   The inner diameter of the peripheral wall (10) is smaller than the outer diameter of the distal end of the syringe (B), and the base end of the peripheral wall (10) is expanded when the distal end of the syringe (B) is fitted. The needle cover of the syringe according to Item 1. 先端部外周に放射状の係合リブ（35）を突設した注射器（Ｂ）に対して使用し、各係合リブ（35）の外面に内面を圧接係合する周方向複数の係止突部（16）を横設し、各係止突部（16）間にそれぞれ縦突条（15）を縦設した請求項１又は請求項２に記載の注射器の針カバー。   A plurality of circumferentially extending locking projections that are used for a syringe (B) having radial engagement ribs (35) projecting from the outer periphery of the distal end portion, and in which the inner surface is press-engaged to the outer surface of each engagement rib (35) The needle cover of the syringe according to claim 1 or 2, wherein (16) is horizontally provided, and vertical protrusions (15) are vertically provided between the respective locking protrusions (16).
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