JP2009000194A - Syringe - Google Patents

Syringe Download PDF

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Publication number
JP2009000194A
JP2009000194A JP2007162332A JP2007162332A JP2009000194A JP 2009000194 A JP2009000194 A JP 2009000194A JP 2007162332 A JP2007162332 A JP 2007162332A JP 2007162332 A JP2007162332 A JP 2007162332A JP 2009000194 A JP2009000194 A JP 2009000194A
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Prior art keywords
syringe
needle assembly
injection needle
outer cylindrical
tip
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Pending
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JP2007162332A
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Japanese (ja)
Inventor
Hideaki Kawamura
英明樹 川村
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Daikyo Seiko Ltd
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Daikyo Seiko Ltd
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Priority to JP2007162332A priority Critical patent/JP2009000194A/en
Priority to PCT/JP2008/060890 priority patent/WO2008156036A1/en
Publication of JP2009000194A publication Critical patent/JP2009000194A/en
Pending legal-status Critical Current

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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
    • A61M5/34—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
    • 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
    • A61M5/346—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub friction fit
    • 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
    • A61M5/3129—Syringe barrels
    • A61M5/3134—Syringe barrels characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula

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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)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a syringe not having a part intercepting a visual field when the state of a needle tip is confirmed after an injection needle assembly is attached to the syringe and certainly confirming the state of the needle tip. <P>SOLUTION: The syringe barrel 10 has a nozzle 14 for the syringe, to which an injection needle assembly 11 having an injection needle 12 provided to its leading end part is attached in a freely detachable manner, formed thereto and an outside cylindrical part 15, which is made almost cylindrical so as to surround the outside of the nozzle 14 for the syringe, formed thereto. The inward projection 17, which is locked with the flange part 13 of the injection needle assembly 11 to support the flange part 13 in the case where the flange part 13 is inserted, is formed to the inside of the outside cylindrical part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は注射器に関するもので、詳しくは注射器内に薬剤などが予め充填されたプレフィルド型の注射器に関するものである。   The present invention relates to a syringe, and more particularly to a prefilled syringe in which a medicine or the like is prefilled in the syringe.

注射器には、注射器兼用容器内に予め注射剤を充填しておき、開口端部を密封栓で封止した状態で輸送、保管し、投与の際には注射器先端側に注射針を備えた注射針アッセンブリを取り付けるとともに、プランジャーで密封栓を先端側に押し込み注射器内を摺動させることにより、充填された注射剤を注射針側から流出させて投与できるいわゆるプレフィルド型注射器が知られている。このプレフィルド型注射器は、操作が簡単であること、緊急時でも薬剤の誤用がなく正確な投与量を投与できること、さらには薬液を移し替える操作が必要なく、微生物汚染を回避しやすく衛生性が高いことなど種々の利点がある。
図４は従来の注射器のルアーチップタイプの注射器バレル部分を示したものである。
この注射器１では、注射器バレル２の先端部に、細孔が形成されたノズル３が形成され、このノズル３に、注射針４を先端に備えた注射針アッセンブリ５が着脱自在に取り付けられている。
一方、図５および図６に示したように、注射針アッセンブリの外れを防止するようにしたルアーロックタイプの注射器が提供されている（例えば、特許文献１）。
図５および図６に示した従来のルアーロックタイプの注射器２０では、注射器バレル６の先端部にルアーロック部２１が具備されている。すなわち、先端部に設けた外側筒部２２の内周面に、螺旋状の溝８が形成され、この溝８に注射針アッセンブリ５のフランジ部７が螺進されることにより、注射針アッセンブリ５の注射器バレル６への取り付けが行なわれている。なお、図５および図６に示したフランジ部７は、図４に示した注射針アッセンブリ５のフランジ部７の場合と同様に、０度と１８０度との位置に、小突起７ａ、７ａが形成されたものである。
特開平１０−２７２１８３号公報 The syringe is pre-filled with an injection in a syringe combined container, transported and stored in a state where the open end is sealed with a sealing plug, and an injection equipped with an injection needle at the tip of the syringe for administration A so-called prefilled syringe is known in which a needle assembly is attached and a sealing stopper is pushed by a plunger toward the tip side and slid in the syringe to allow the filled injection to flow out from the injection needle side for administration. This pre-filled syringe is easy to operate, can be administered accurately without any drug misuse even in an emergency, and does not require an operation to transfer chemicals, and it is easy to avoid microbial contamination and has high hygiene There are various advantages.
FIG. 4 shows a luer tip type syringe barrel portion of a conventional syringe.
In this syringe 1, a nozzle 3 having a pore is formed at the tip of a syringe barrel 2, and a syringe assembly 5 having a syringe needle 4 at the tip is detachably attached to the nozzle 3. .
On the other hand, as shown in FIGS. 5 and 6, a luer lock type syringe is provided which prevents the needle assembly from coming off (for example, Patent Document 1).
In the conventional luer lock type syringe 20 shown in FIGS. 5 and 6, a luer lock portion 21 is provided at the tip of the syringe barrel 6. That is, a spiral groove 8 is formed on the inner peripheral surface of the outer cylindrical portion 22 provided at the distal end portion, and the flange portion 7 of the injection needle assembly 5 is screwed into the groove 8, whereby the injection needle assembly 5. Is attached to the syringe barrel 6. 5 and 6, the small protrusions 7a and 7a are provided at the positions of 0 degrees and 180 degrees, as in the case of the flange section 7 of the injection needle assembly 5 illustrated in FIG. It is formed.
Japanese Patent Laid-Open No. 10-272183

ところで、図４に示したルアーチップタイプの注射器１では、注射針アッセンブリ５が単に差込により装着されているため、この差込による装着が十分でないと、注射時の加圧などにより注射針アッセンブリ５が注射器バレル２から外れてしまう虞があった。
一方、図５および図６に示したルアーロックタイプの注射器２０では、装着性は確実であるものの、外側筒部２２に螺旋状の溝８を形成しなければならないため、外側筒部２２の長さが長くなり、使用時に螺旋状の溝８を形成した外側筒部２２が視野の邪魔になって、実際に注射を行なう場合に、針先（患部）が見えづらくなるという問題があった。
また、注射針アッセンブリ５のフランジ部７を、ルアーロック部２１の先端部に設けた外側筒部２２の内周面に形成された螺旋状の溝８にそって回転螺進させて装着するため、装着に手間取る虞もあった。
本発明はこのような実情に鑑みてなされたものであり、注射針アッセンブリを注射器バレルに取り付けた場合に、その注射針アッセンブリが外れる虞がなく、実際に注射を行なう場合、針先（患部）の視認性も良好な注射器を提供することを、目的としている。また、注射針アッセンブリの素早い注射器バレルへの装着を確保することも、目的としている。 By the way, in the Luer tip type syringe 1 shown in FIG. 4, since the injection needle assembly 5 is simply attached by insertion, if the attachment by this insertion is not sufficient, the injection needle assembly is caused by pressurization at the time of injection or the like. There was a risk that 5 would come off the syringe barrel 2.
On the other hand, in the luer lock type syringe 20 shown in FIGS. 5 and 6, although the mounting property is reliable, the spiral groove 8 must be formed in the outer cylindrical portion 22, so that the length of the outer cylindrical portion 22 is long. There is a problem that the outer cylindrical portion 22 in which the spiral groove 8 is formed at the time of use obstructs the field of view, and it is difficult to see the needle tip (affected part) when actually performing injection.
In addition, the flange portion 7 of the injection needle assembly 5 is rotationally screwed along the spiral groove 8 formed on the inner peripheral surface of the outer cylindrical portion 22 provided at the distal end portion of the luer lock portion 21 for mounting. There was also a risk that it would take time to install.
The present invention has been made in view of such circumstances, and when an injection needle assembly is attached to a syringe barrel, there is no possibility that the injection needle assembly will come off, and when actually performing injection, the needle tip (affected part) It is an object to provide a syringe with good visibility. It is also an object to ensure that the needle assembly is quickly attached to the syringe barrel.

本発明に係る注射器は、先端部に注射針を備えた注射針アッセンブリがフランジ部を介して着脱自在に取り付けられる注射器用ノズルが形成されるとともに、この注射器用ノズルの外側を囲繞するように略円筒状の外側筒部が形成された注射器であって、前記外側筒部の長さが、螺旋状の溝８を形成したルアーロックタイプの注射器の外側筒部２２の長さに比較して短く、該外側筒部の先端部を細くテーパー状に成形することで、視野が広くなっており、該外側筒部の内側に、前記注射針アッセンブリの前記フランジ部が挿入された場合に、このフランジ部を係止して支持することが可能な内方突起が形成されていることを特徴としている。
ここで、前記外側筒部の内側に形成された内方突起は、前記外側筒部の内周面全周にわたって形成された、環状（リング状）ものであっても良く、前記外側筒部の内周面に所定間隔置きに形成された、複数の突部から構成されていても良い。
このような構成であるので、針先の視認性が良好であるとともに、注射針アッセンブリの外れが生じることもなく、また、注射針アッセンブリの素早い注射器バレルへの装着も確保出来る。 The syringe according to the present invention is formed so that a syringe nozzle to which a syringe needle assembly having a syringe needle at a tip portion is detachably attached via a flange portion is formed and surrounds the outside of the syringe nozzle. A syringe in which a cylindrical outer cylinder portion is formed, and the length of the outer cylinder portion is shorter than the length of the outer cylinder portion 22 of the luer lock type syringe in which the spiral groove 8 is formed. When the flange portion of the injection needle assembly is inserted inside the outer cylinder portion, the flange is formed when the distal end portion of the outer cylinder portion is formed into a tapered shape. An inward projection capable of locking and supporting the portion is formed.
Here, the inner protrusion formed on the inner side of the outer cylindrical portion may be an annular (ring-shaped) one formed over the entire inner peripheral surface of the outer cylindrical portion, You may be comprised from the several protrusion formed in the inner peripheral surface at predetermined intervals.
With such a configuration, the visibility of the needle tip is good, the needle assembly is not detached, and the needle assembly can be secured to the syringe barrel quickly.

本発明に係る注射器では、ルアーロック部の外側筒部の壁が従来のルアーロック部の外側筒部より短い。すなわち、注射を打つ際、手元側から針先（患部）を見た場合に、これまでは視野の邪魔になっていた外側筒部の壁を形成する部分の長さが邪魔にならない程度に短く成形されている。このような構成に加え、先端に向かってテーパーを、形成することより、さらに視野を改善することも可能である。これによって、針先（患部）の視認性が、良好となる。
また、内方突起で注射針アッセンブリのフランジ部が確実に係止されるので、該注射針アッセンブリの外れが生じることもなく、その装着も、嵌合不要であるので、素早く出来る。 In the syringe according to the present invention, the wall of the outer cylinder part of the luer lock part is shorter than the outer cylinder part of the conventional luer lock part. That is, when hitting an injection, when the needle tip (affected part) is viewed from the hand side, the length of the part that forms the wall of the outer cylindrical part, which has been a hindrance to the field of view so far, is not short enough Molded. In addition to such a configuration, the visual field can be further improved by forming a taper toward the tip. As a result, the visibility of the needle tip (affected part) is improved.
Further, since the flange portion of the injection needle assembly is securely locked by the inward projection, the injection needle assembly does not come off and can be mounted quickly because fitting is unnecessary.

次に、好ましい実施の形態を挙げて本発明を更に詳細に説明する。
図１は、本発明の一実施例による注射器バレルを備えた注射器を示したものである。
本実施例の注射器バレル１０は、軸線を中心とする略円筒体を呈している。
この注射器バレル１０は、図２（Ａ），（Ｂ）に示したように、先端部に薬液が吐出される注射器用ノズル１４とこのノズル１４を囲繞する略円筒状の外側筒部１５とを備え、これらノズル１４と外側筒部１５とによりルアーロック部１６が構成されている。 Next, the present invention will be described in more detail with reference to preferred embodiments.
FIG. 1 shows a syringe with a syringe barrel according to an embodiment of the present invention.
The syringe barrel 10 of the present embodiment has a substantially cylindrical body centered on the axis.
As shown in FIGS. 2 (A) and 2 (B), the syringe barrel 10 includes a syringe nozzle 14 for discharging a drug solution at a tip portion and a substantially cylindrical outer tube portion 15 surrounding the nozzle 14. In addition, the nozzle 14 and the outer cylindrical portion 15 constitute a luer lock portion 16.

ここで、ルアーロックとは、狭義の意味では、ネジ山とネジ溝との関係のように、特殊な力が作用しないかぎり外れない嵌合構造を表現しているが、本明細書では、図１に示した注射器バレル１０と注射針アッセンブリ１１との間に構成される嵌合構造であって、注射器用ノズル１４を囲繞する略円筒状の外側筒部１５によって注射針アッセンブリ１１のフランジ部１３を外側から確実に係止する嵌合構造部分を、ルアーロック部と称する。   Here, in a narrow sense, the luer lock expresses a fitting structure that cannot be removed unless a special force is applied, such as the relationship between a screw thread and a screw groove. 1 is a fitting structure configured between the syringe barrel 10 and the needle assembly 11 shown in FIG. 1, and a flange portion 13 of the needle assembly 11 is formed by a substantially cylindrical outer tube portion 15 surrounding the syringe nozzle 14. The fitting structure portion that securely locks from the outside is referred to as a luer lock portion.

さらに、本実施例のルアーロック部１６を構成する外側筒部１５の内周面における開口端には、環状の内方突起１７が全周に亘って形成されている。この内方突起１７は、全周に亘ってリング状（環状）に形成されたものであるが、所定間隔置きに形成された複数の突部から構成されていても良い。その場合、図４に例示する様に０度と１８０度の位置に小突起７ａの有るフランジ部を持つ注射器アッセンブリを、装着することから、少なくとも２個以上で偶数個形成されていれば良い。図３（Ａ）に示したように、２個の場合は、１８０度異なる位置に突部１７ａを形成する必要がある。さらに、４個である場合、図３（Ｂ）に示したように、突部１７ａを９０度間隔置きに形成する。このように突部１７ａを形成すれば、注射針アッセンブリの装着を確実なものとすることから好ましい。   Furthermore, an annular inward projection 17 is formed over the entire circumference at the opening end of the inner peripheral surface of the outer cylindrical portion 15 constituting the luer lock portion 16 of the present embodiment. The inward projections 17 are formed in a ring shape (annular shape) over the entire circumference, but may be composed of a plurality of projections formed at predetermined intervals. In this case, as illustrated in FIG. 4, since the syringe assembly having the flange portion having the small protrusions 7a at the positions of 0 degrees and 180 degrees is mounted, it is sufficient that at least two or more even numbers are formed. As shown in FIG. 3A, in the case of two, it is necessary to form the protrusions 17a at positions different by 180 degrees. Further, when there are four, as shown in FIG. 3B, the protrusions 17a are formed at intervals of 90 degrees. Forming the protrusion 17a in this manner is preferable because the mounting of the injection needle assembly is ensured.

また、図３（Ｃ）に示したように、フランジ部７の２つの小突起７ａ，７ａを、切欠き部３０ａ，３０ａ内に挿入し、その状態から略９０度回動させれば、切欠き部３０ａの存在しない壁体３０ｂで抜け防止を図ることができる。また、図３（Ｄ）に示したように、切り欠部３０ａを９０度置きに４個形成すれば、より一層装着時の姿勢が限定されない。これにより、図３（Ｃ）に比べてより容易に装着することができる。   Further, as shown in FIG. 3C, if the two small protrusions 7a, 7a of the flange portion 7 are inserted into the notches 30a, 30a and rotated from that state by approximately 90 degrees, It is possible to prevent the wall body 30b having no notch 30a from coming off. Further, as shown in FIG. 3D, if four notches 30a are formed every 90 degrees, the posture at the time of mounting is not further limited. Thereby, it can mount | wear more easily compared with FIG.3 (C).

このように本発明における内方突起１７は、図２に示したように全周に亘ってリング状（環状）に形成されたものである場合と、図３（Ａ），（Ｂ）に示したように複数の突部１７ａから構成される場合と、この他に、図３（Ｃ）、（Ｄ）に示したように、切欠き部３０ａを２個あるいは４個程度形成することにより、切欠き部３０ａを形成していない周辺の壁体３０ｂを内方突起として構成する場合をも含んでいる。いずれにしても注射針アッセンブリのフランジ部に相当する部材を安定に係止できれば、全体の形状、断面の形状、数などは限定されるものではない。   As described above, the inward projection 17 in the present invention is formed in a ring shape (annular) as shown in FIG. 2, and shown in FIGS. 3 (A) and 3 (B). As shown in FIGS. 3 (C) and 3 (D), in addition to the case where the plurality of protrusions 17a are formed as described above, by forming about two or four notches 30a, The case where the surrounding wall body 30b which does not form the notch part 30a is comprised as an inward protrusion is also included. In any case, as long as a member corresponding to the flange portion of the injection needle assembly can be stably locked, the overall shape, cross-sectional shape, number, and the like are not limited.

一方、図１に示した注射針アッセンブリ１１は、注射針１２を支持するための基台であり、その取り付側の端部に、フランジ部１３が形成されている。
本実施例の注射器バレル１０と注射針アッセンブリ１１は、上記のように形成されているが、以下に組み付けについて説明する。 On the other hand, the injection needle assembly 11 shown in FIG. 1 is a base for supporting the injection needle 12, and a flange portion 13 is formed at an end portion on the mounting side.
The syringe barrel 10 and the needle assembly 11 of the present embodiment are formed as described above, and the assembly will be described below.

先ず、図２（Ａ），（Ｂ）に示した注射器バレル１０の先端部に、注射針アッセンブリ１１を対向配置し、注射針アッセンブリ１１の基端側をノズル１４に被せるように、そのフランジ部１３を注射器バレル１０のルアーロック部１６に差し込む。
このとき、先ず注射針アッセンブリ１１のフランジ部１３が内方突起１７に当接し、この内方突起１７を乗り越えるようにして外側筒部１５の内部に挿入される。そして、一旦、フランジ部１３が内方突起１７を乗り超えると、フランジ部１３が外側筒部１５の内方突起１７に捕捉され、これにより移動不能に位置決めされる。これにより、注射針アッセンブリ１１の注射器バレル１０に対する取り付けが完了する。 First, the syringe needle assembly 11 is opposed to the distal end portion of the syringe barrel 10 shown in FIGS. 2A and 2B, and the flange portion is provided so that the proximal end side of the syringe needle assembly 11 covers the nozzle 14. 13 is inserted into the luer lock 16 of the syringe barrel 10.
At this time, first, the flange portion 13 of the injection needle assembly 11 comes into contact with the inner protrusion 17 and is inserted into the outer cylinder portion 15 so as to get over the inner protrusion 17. Once the flange portion 13 gets over the inward projection 17, the flange portion 13 is captured by the inward projection 17 of the outer cylinder portion 15, thereby being positioned so as not to move. Thereby, the attachment of the needle assembly 11 to the syringe barrel 10 is completed.

このように、本実施例の注射器によれば、従来品のルアーロック部のネジ溝が無く、ネジ溝を形成していた壁体そのものが短くなっている。また、先端部に向かってテーパーを、形成することも出来る。したがって、注射針アッセンブリ１１を取り付けた状態のルアーロック部１６を、外部から確認すると、手元側から針先（患部）を見た場合の視野が広がっているので、注射する場合の作業性が良好である。   As described above, according to the syringe of this embodiment, there is no thread groove of the conventional luer lock portion, and the wall body itself having the thread groove is shortened. Further, a taper can be formed toward the tip. Accordingly, when the luer lock portion 16 with the injection needle assembly 11 attached is confirmed from the outside, the field of view when the needle tip (affected part) is viewed from the hand side is widened, so that the workability when injecting is good. It is.

また、内方突起１７がフランジ部１３を確実に係止しているので、注射針アッセンブリ１１が脱落することもなく、その装着も嵌合不要であるので、素早く出来る。
なお、本発明に係る注射器バレル１０の材質としては、一般にプラスチックが使用されており、例えば環状オレフィン系樹脂、環状オレフィン−エチレン共重合体、ポリエチレンテレフタレート系樹脂、ポリスチレン樹脂、ポリエチレンテレフタレート樹脂等が挙げられるが、特に透明性や耐熱性が高く、医薬品との化学的な相互作用のない環状オレフィン系樹脂、環状オレフィン−エチレン共重合体（例えば特許第２９１４８２６号公報記載の衛生用容器に用いられているもの）の使用が好ましい。 Further, since the inward projection 17 securely locks the flange portion 13, the injection needle assembly 11 does not fall off, and it is not necessary to fit it, so that it can be done quickly.
In addition, as a material of the syringe barrel 10 according to the present invention, plastic is generally used, and examples thereof include a cyclic olefin resin, a cyclic olefin-ethylene copolymer, a polyethylene terephthalate resin, a polystyrene resin, and a polyethylene terephthalate resin. However, it is particularly high in transparency and heat resistance, and has no chemical interaction with pharmaceuticals. Cyclic olefin resins and cyclic olefin-ethylene copolymers (for example, used in sanitary containers described in Japanese Patent No. 2914826) Are preferred).

なお、本発明の注射器には、ピストンとして密封栓を使用したものであれば、例えば特開平８−３０８６８８号公報に記載されているような２室型の注射器なども含まれる。
さらに、上記実施例では図示していないが、注射器バレル１０内に薬液を密封するピストンは、特許第３３８７７７５号に開示されているように、ピストン本体の表面に、例えば、テトラフルオロエチレン樹脂フィルムまたは超高分子量ポリエチレンフィルムがラミネートされていても良い。 The syringe of the present invention includes, for example, a two-chamber syringe as described in JP-A-8-308688 as long as a sealing plug is used as a piston.
Further, although not shown in the above embodiment, the piston that seals the drug solution in the syringe barrel 10 is, for example, a tetrafluoroethylene resin film or the like on the surface of the piston body as disclosed in Japanese Patent No. 3387775. An ultra high molecular weight polyethylene film may be laminated.

図１は本発明の一実施例による注射器の先端部分を説明する断面図である。FIG. 1 is a cross-sectional view illustrating a tip portion of a syringe according to an embodiment of the present invention. 図２（A),（B)は、図1の注射器の一部拡大図面と，概略断面図である。2A and 2B are a partially enlarged view and a schematic sectional view of the syringe of FIG. 図３（Ａ）は、外側筒部に形成する内方突起を、２つの突部で構成する場合の断面図、図３（Ｂ）は外側筒部に形成する内方突起を４つの突部で構成する場合の断面図、図３（Ｃ）は、外側筒部に形成する内方突起が切欠き部以外の２つの壁体で構成される場合の断面図、図３（Ｄ）は、外側筒部に形成する内方突起が切欠き部以外の４つの壁体で構成される場合の断面図である。FIG. 3A is a cross-sectional view of the case where the inner protrusion formed on the outer cylindrical portion is configured by two protrusions, and FIG. 3B is the four protrusions of the inner protrusion formed on the outer cylindrical portion. FIG. 3C is a cross-sectional view when the inner protrusion formed on the outer cylindrical portion is constituted by two wall bodies other than the notch portion, and FIG. It is sectional drawing in case the inward protrusion formed in an outer side cylinder part is comprised by four wall bodies other than a notch part. 図４は従来の注射器の斜視図である。FIG. 4 is a perspective view of a conventional syringe. 図５は、他の従来の注射器の断面図である。FIG. 5 is a cross-sectional view of another conventional syringe. 図６は、図５に示した従来の注射器の斜視図である。6 is a perspective view of the conventional syringe shown in FIG.

符号の説明Explanation of symbols

１ 注射器１
２ 注射器バレル
３ ノズル
４ 注射針
５ 注射針アッセンブリ
６ 注射器バレル
７ フランジ部
７ａ 小突起
８ 螺旋状の溝
１０ 注射器バレル
１１ 注射針アッセンブリ
１２ 注射針
１３ フランジ部
１４ ノズル
１５ 外側筒部
１６ ルアーロック部
１７ 内方突起
１７ａ 突部
２０ 注射器
２１ ルアーロック部
２２ 外側筒部
３０ａ 切欠き部
３０ｂ 壁体 1 Syringe 1
2 Syringe barrel 3 Nozzle 4 Injection needle 5 Injection needle assembly 6 Syringe barrel 7 Flange 7a Small projection 8 Helical groove 10 Syringe barrel 11 Injection needle assembly 12 Injection needle 13 Flange 14 Nozzle 15 Outer cylinder 16 Luer lock 17 Inward protrusion 17a Protrusion 20 Syringe 21 Luer lock part 22 Outer cylinder part 30a Notch part 30b Wall body

Claims (3)

先端部に注射針を備えた注射針アッセンブリがフランジ部を介して着脱自在に取り付けられる注射器用ノズルが形成されるとともに、この注射器用ノズルの外側を囲繞するように略円筒状の外側筒部が形成された注射器であって、
前記外側筒部の内側に、前記注射針アッセンブリの前記フランジ部が挿入された場合に、このフランジ部を係止して支持することが可能な内方突起が形成されていることを特徴とする注射器。 A syringe nozzle is formed in which an injection needle assembly having an injection needle at the tip is detachably attached via a flange portion, and a substantially cylindrical outer tube portion is formed so as to surround the outside of the syringe nozzle. A formed syringe,
An inward projection is formed on the inner side of the outer cylindrical portion so as to lock and support the flange portion when the flange portion of the injection needle assembly is inserted. Syringe. 前記外側筒部の内側に形成された内方突起は、前記外側筒部の内周面全周にわたって環状に形成されたものであることを特徴とする請求項１に記載の注射器。   The syringe according to claim 1, wherein the inward projection formed on the inner side of the outer cylindrical portion is formed in an annular shape over the entire inner peripheral surface of the outer cylindrical portion. 前記外側筒部の内側に形成された内方突起は、前記外側筒部の内周面に所定間隔置きに形成された複数の突部から構成されていることを特徴とする請求項１に記載の注射器。   The inward projection formed on the inner side of the outer cylindrical portion is composed of a plurality of protruding portions formed at predetermined intervals on the inner peripheral surface of the outer cylindrical portion. Syringe.
JP2007162332A 2007-06-20 2007-06-20 Syringe Pending JP2009000194A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2007162332A JP2009000194A (en) 2007-06-20 2007-06-20 Syringe
PCT/JP2008/060890 WO2008156036A1 (en) 2007-06-20 2008-06-13 Syringe

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JP2007162332A JP2009000194A (en) 2007-06-20 2007-06-20 Syringe

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DE102017200007A1 (en) * 2017-01-02 2018-07-05 Schott Ag Syringe with different materials
CN112429399A (en) * 2020-11-23 2021-03-02 石家庄禾柏生物技术股份有限公司 Sealing cover
US12090262B2 (en) * 2021-09-01 2024-09-17 Tissuecor, Llc Device and system for injecting biological tissue

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US20040064107A1 (en) * 2002-09-27 2004-04-01 Pi-Chang Lo Locking design for a needle head

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JP2603107Y2 (en) * 1993-11-16 2000-02-28 東洋製罐株式会社 Tube fittings

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Publication number Priority date Publication date Assignee Title
US20040064107A1 (en) * 2002-09-27 2004-04-01 Pi-Chang Lo Locking design for a needle head

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