JP4696860B2 - Medical needle - Google Patents

Medical needle Download PDF

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JP4696860B2
JP4696860B2 JP2005323343A JP2005323343A JP4696860B2 JP 4696860 B2 JP4696860 B2 JP 4696860B2 JP 2005323343 A JP2005323343 A JP 2005323343A JP 2005323343 A JP2005323343 A JP 2005323343A JP 4696860 B2 JP4696860 B2 JP 4696860B2
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bent
hub
bent portion
cannula
fixed
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JP2007130052A (en
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芳雄 檜垣
献二 矢代
佳邦 内田
智弘 田辺
洋太 関塚
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Nipro Corp
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Nipro Corp
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Description

本発明は、径が細く肉厚の薄いカヌラを有する医療用注射針に関し、より詳しくは、歯の治療に際して局部麻酔を行うときに使用される歯科用注射針や、インシュリンの注射に使用する注射針等に関する。   The present invention relates to a medical injection needle having a thin cannula with a small diameter, and more specifically, a dental injection needle used when performing local anesthesia in the treatment of teeth, and an injection used for injection of insulin. It relates to needles.

従来、歯の治療時に、歯根に麻酔剤を注入する場合には、ハブにカヌラが挿通固着された歯科用注射針が用いられる。この場合、口腔が狭いため、カヌラの前部が直線状のままでは、カヌラの前端部を注入部位まで案内できないことが多い。そこで、カヌラにおける、ハブに対する固着部分よりも前方側が、折曲げ可能な折曲部とされ、必要に応じて、折曲部を後端部から適当な角度に折曲げて、使用している。   Conventionally, when injecting an anesthetic into a tooth root during tooth treatment, a dental injection needle having a cannula inserted and fixed to a hub is used. In this case, since the oral cavity is narrow, the front end of the cannula cannot often be guided to the injection site if the front part of the cannula remains straight. Therefore, the front side of the cannula with respect to the fixing portion with respect to the hub is a foldable foldable portion, and the foldable portion is bent at an appropriate angle from the rear end portion as necessary.

上記の場合に、折曲部の軸心に対する折曲角度が所定角度以内であれば、問題はない。然しながら、誤って、折曲角度を所定角度よりも大とした場合には、歯根に穿刺している際に、折曲部が後端部から折れて、破断する惧れがあり、大変危険であるとの問題があった。   In the above case, there is no problem if the bending angle with respect to the axis of the bent portion is within a predetermined angle. However, if the bending angle is accidentally made larger than the predetermined angle, there is a possibility that the bent portion may be broken from the rear end and ruptured when puncturing the root, which is very dangerous. There was a problem with it.

発明が解決しようとする課題は、折曲部を折曲げた際に、折曲部が後端部から折れて、破断する惧れがあった点である。   The problem to be solved by the invention is that when the bent portion is bent, the bent portion may be broken from the rear end portion and may be broken.

本発明は上記課題を解決できる医療用注射針を提供することを目的とし、その目的を達成するために、本発明の特徴とするところは、ハブにカヌラが挿通固着され、カヌラにおける、ハブに対する固着部分よりも前部側が、折曲げ可能な折曲部とされ、ハブの前端部に、折曲部の後端部を内有する環状リブが前方突出状に形成され、折曲部の後端部に、折曲部の折曲時に、環状リブの前端部と当接することで、折曲部の折曲げを規制して、折曲部の軸心に対する折曲角度を所定角度に規制する規制体が外嵌固着された点にある。
又、規制体が球体とされ、その中心部に折曲部が挿通固着されることもある。
更に、所定角度が鋭角とされることもある。
An object of the present invention is to provide a medical injection needle that can solve the above-mentioned problems. In order to achieve the object, the present invention is characterized in that a cannula is inserted and fixed to a hub, and the cannula is connected to the hub. The front side of the fixed part is a foldable foldable part, and an annular rib having a rear end part of the foldable part is formed on the front end part of the hub so as to protrude forward, and the rear end of the foldable part Restricting the bending angle of the bent portion with respect to the axis of the bent portion to a predetermined angle by contacting the front end portion of the annular rib when the bent portion is bent It is in the point where the body was fixed by external fitting.
Further, the regulating body may be a sphere, and the bent portion may be inserted and fixed at the center.
Furthermore, the predetermined angle may be an acute angle.

本発明によれば、折曲部を折曲げた際に、折曲部が後端部から折れて、破断することを防止できる。
又、折曲部の折曲時に、折曲部の規制体よりも前部側を、更に、折曲げることも可能で、これにより、折曲部の折曲角度を、無理なく、大とできる。

According to the present invention, when the bent portion is bent, the bent portion can be prevented from being broken and broken from the rear end portion.
In addition, when the bent portion is bent, the front side of the bent portion can be further bent, so that the bent angle of the bent portion can be made large without difficulty. .

以下、本発明を歯科用注射針に適用した実施の形態の第１例を図１の図面に基づき説明すると、注射針は、カヌラ１とハブ（針基）２を有する。   Hereinafter, a first example of an embodiment in which the present invention is applied to a dental injection needle will be described with reference to the drawing of FIG. 1. The injection needle has a cannula 1 and a hub (needle base) 2.

カヌラ１はステンレス製とされ、前後両端が開口する中空状とされて、ハブ２に挿通固着され、カヌラ１における、ハブ２に対する固着部分よりも前部側が、外力による塑性変形（弾性変形の場合もある。）により折曲げ可能な折曲部４とされている。   The cannula 1 is made of stainless steel, has a hollow shape with both front and rear ends open, and is fixedly inserted into and fixed to the hub 2. The front side of the cannula 1 with respect to the hub 2 is plastically deformed by external force (in the case of elastic deformation). In other words, the bent portion 4 can be bent.

ハブ２は、ポリエチレンやポリプロピレン等の透明な熱可塑性プラスチックで形成されて、略円筒状に形成されている。ハブ２の後部は、注射器（図示省略）のチップに装着される装着部６とされ、装着部６の外周面には、結合手段として、２条螺子７が形成されている。ハブ２の前部側の内部には、カヌラ１の軸心方向中間部が挿通固着される固着部８が形成されている。この固着は、インサート成形又は（高周波又は超音波による）溶着により行われる。ハブ２の前端部には、固着部８よりも前方に位置する円筒状の環状リブ９が前方突出状に形成されている。ハブ２の前端部の内部には、固着部８よりも前方に位置する空間部１０が形成されている。空間部１０は、折曲部４の折曲げを許容すると共に、その前端部、即ち、環状リブ９の前端部が折曲部４の規制手段を構成し、図１（Ｂ）で示すように、折曲部４と当接することで、折曲部４の軸心Ｘに対する折曲角度１１を所定角度、例えば、所定の鋭角に規制する。尚、注射針が３０Ｇ×２１ｍｍのサイズのもので、環状リブ９の軸心方向の長さは、例えば、１．５０±０．４１ｍｍとされる。   The hub 2 is formed of a transparent thermoplastic such as polyethylene or polypropylene, and has a substantially cylindrical shape. The rear portion of the hub 2 is a mounting portion 6 to be mounted on a tip of a syringe (not shown), and a double thread 7 is formed on the outer peripheral surface of the mounting portion 6 as a coupling means. Inside the front side of the hub 2, a fixing portion 8 is formed in which an intermediate portion in the axial center direction of the cannula 1 is inserted and fixed. This fixing is performed by insert molding or welding (by high frequency or ultrasonic waves). At the front end of the hub 2, a cylindrical annular rib 9 positioned in front of the fixing portion 8 is formed to protrude forward. A space portion 10 is formed in the front end portion of the hub 2 so as to be positioned in front of the fixing portion 8. The space portion 10 allows the bent portion 4 to be bent, and the front end portion thereof, that is, the front end portion of the annular rib 9 constitutes the restricting means of the bent portion 4, as shown in FIG. By contacting the bent portion 4, the bent angle 11 with respect to the axis X of the bent portion 4 is regulated to a predetermined angle, for example, a predetermined acute angle. The injection needle has a size of 30 G × 21 mm, and the length of the annular rib 9 in the axial direction is, for example, 1.50 ± 0.41 mm.

図２及び図３は、本発明の実施の形態の第２例を示し、ハブ２の前端部の外周面が、軸心方向に関して一定径とされたストレート面（一定径部）１３と、前方に向かってテーパー状とされ且つ前端外径がカヌラ１の外径と略同一とされたテーパー面１４が前方に向かって連設されることで、構成されている。   2 and 3 show a second example of the embodiment of the present invention, in which the outer peripheral surface of the front end portion of the hub 2 has a straight surface (constant diameter portion) 13 having a constant diameter in the axial direction, and a front side. A tapered surface 14 that is tapered toward the front and whose front end outer diameter is substantially the same as the outer diameter of the cannula 1 is provided in a continuous manner toward the front.

ストレート面１３、テーパー面１４及び折曲部４の後端部には、カバー体１６が外嵌装着されている。カバー体１６は、軟質材料、例えば、ポリエチレンやポリプロピレン等の軟質のプラスチックにより一体形成されている。カバー体１６は、後部側のハブ装着部１７と前部側のカヌラ装着部１８を有する。ハブ装着部１７は、ストレート面１３及びテーパー面１４と対応する形状とされ、これらに外嵌されて、固着されている。この固着は、溶着、接着剤による接着又は粘着剤による粘着により行われる。カヌラ装着部１８は、細い円筒状とされて、折曲部４の後部に外嵌されている。尚、カヌラ装着部１８は、折曲部４に対し、上記のような固着手段により固着される場合と、単に、外嵌されるだけのこともある。カバー体１６は、折曲部４の折曲げ規制手段を構成し、折曲部４の折曲時に、ハブ装着部１７に対するカヌラ装着部１８の折曲抵抗により、折曲部４の折曲げを所定角度に規制する。   A cover body 16 is externally attached to the straight surface 13, the tapered surface 14, and the rear end portion of the bent portion 4. The cover body 16 is integrally formed of a soft material, for example, a soft plastic such as polyethylene or polypropylene. The cover body 16 includes a hub mounting portion 17 on the rear side and a canula mounting portion 18 on the front side. The hub mounting portion 17 has a shape corresponding to the straight surface 13 and the tapered surface 14, and is externally fitted and fixed thereto. This fixing is performed by welding, adhesion by an adhesive, or adhesion by an adhesive. The cannula mounting portion 18 has a thin cylindrical shape and is fitted on the rear portion of the bent portion 4. Note that the cannula mounting portion 18 may be fixed to the bent portion 4 by the fixing means as described above, or may simply be externally fitted. The cover body 16 constitutes a bending restricting means for the bent portion 4, and the bent portion 4 is bent by the bending resistance of the cannula mounting portion 18 with respect to the hub mounting portion 17 when the bent portion 4 is bent. Restrict to a predetermined angle.

図４は、本発明の実施の形態の第３例を示すもので、折曲部４の後部に球状の規制体２０が外嵌固着されている。具体的には、折曲部４が規制体２０の中心部に挿通固着されている。この固着は、溶着、接着剤による接着又は粘着剤による粘着により行われる。規制体２０は、プラスチック等の弾性材料により形成される場合と、金属材料等の硬質材料により形成される場合とがある。規制体２０は、折曲部４の折曲げ規制手段を構成し、図４（Ａ）で示すように、折曲部４の折曲時に、環状リブ９と当接することで、折曲部４の軸心Ｘに対する折曲角度１１を所定角度に規制する。尚、折曲部４の折曲時に、図４（Ａ）の仮想線で示すように、折曲部４の規制体２０よりも前部側を、更に、折曲げることも可能で、これにより、折曲部４の折曲角度１１を、無理なく、大とできる。   FIG. 4 shows a third example of the embodiment of the present invention, and a spherical regulating body 20 is externally fixedly fixed to the rear portion of the bent portion 4. Specifically, the bent portion 4 is inserted and fixed to the center portion of the regulating body 20. This fixing is performed by welding, adhesion by an adhesive, or adhesion by an adhesive. The regulation body 20 may be formed of an elastic material such as plastic, or may be formed of a hard material such as a metal material. The restricting body 20 constitutes a bending restricting means of the bent portion 4, and as shown in FIG. 4A, the bent portion 4 is brought into contact with the annular rib 9 when the bent portion 4 is bent. The bending angle 11 with respect to the axis X is regulated to a predetermined angle. In addition, as shown by the phantom line of FIG. 4 (A), it is possible to further bend the front side of the restricting body 20 of the bent portion 4 when the bent portion 4 is bent. The bending angle 11 of the bent portion 4 can be made large without difficulty.

尚、本発明は歯科用注射針以外の注射針にも適用可能である。   In addition, this invention is applicable also to injection needles other than a dental injection needle.

（Ａ）は本発明の実施の形態の第１例を示す縦側断面図、（Ｂ）は（Ａ）の折曲部を折曲げた状態を示す縦側断面図である。(A) is a longitudinal sectional view showing a first example of an embodiment of the present invention, and (B) is a longitudinal sectional view showing a state in which a bent portion of (A) is bent. 本発明の実施の形態の第２例を示す縦側断面図である。It is a longitudinal cross-sectional view which shows the 2nd example of embodiment of this invention. 図２の要部拡大図である。FIG. 3 is an enlarged view of a main part of FIG. 2. （Ａ）は本発明の実施の形態の第３例を示す縦側断面図、（Ｂ）は（Ａ）の折曲部を折曲げた状態を示す縦側断面図である。(A) is a longitudinal sectional view showing a third example of the embodiment of the present invention, and (B) is a longitudinal sectional view showing a state in which the bent portion of (A) is bent.

符号の説明Explanation of symbols

１ カヌラ
２ ハブ
４ 折曲部
８ 固着部
９ 環状リブ
１１ 折曲角度
１６ カバー体
２０ 規制体 DESCRIPTION OF SYMBOLS 1 Kanura 2 Hub 4 Bending part 8 Adhering part 9 Annular rib 11 Bending angle 16 Cover body 20 Control body

Claims (3)

ハブにカヌラが挿通固着され、
カヌラにおける、ハブに対する固着部分よりも前部側が、折曲げ可能な折曲部とされた医療用注射針において、
ハブの前端部に、折曲部の後端部を内有する環状リブが前方突出状に形成され、
折曲部の後端部に、
折曲部の折曲時に、環状リブの前端部と当接することで、折曲部の折曲げを規制し て、折曲部の軸心に対する折曲角度を所定角度に規制する規制体
が外嵌固着された医療用注射針。 The cannula is inserted and fixed to the hub,
In the medical injection needle in which the front side of the fixed portion to the hub in the cannula is a foldable bending portion,
At the front end of the hub, an annular rib having the rear end of the bent portion is formed in a forward protruding shape,
At the rear end of the bent part,
When the bent part is bent, a restricting body that regulates the bending angle with respect to the axis of the bent part to a predetermined angle by restricting the bending of the bent part by contacting the front end portion of the annular rib. A medical injection needle fitted and fixed. 規制体が球体とされ、その中心部に折曲部が挿通固着された請求項１記載の医療用注射針。 Regulating body is a sphere, medical needle according to claim 1, wherein the bent portion is inserted fixed to the center thereof. 所定角度が鋭角とされた請求項１又は２記載の医療用注射針。 The medical injection needle according to claim 1 or 2, wherein the predetermined angle is an acute angle.
JP2005323343A 2005-11-08 2005-11-08 Medical needle Expired - Fee Related JP4696860B2 (en)

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Publication number Priority date Publication date Assignee Title
WO2009079880A1 (en) * 2007-12-21 2009-07-02 Qiubao Pan Disengagement resistant needle for animal
JPWO2012098766A1 (en) * 2011-01-19 2014-06-09 テルモ株式会社 Syringe with needle and method for manufacturing syringe with needle
US10080839B2 (en) 2013-03-14 2018-09-25 Becton, Dickinson And Company Angled inserter for drug infusion
DE102013014885A1 (en) * 2013-09-06 2015-03-12 Braunform Gmbh Use of a tool for injection molding a plastic body
CA2977851A1 (en) * 2015-04-30 2016-11-03 Zhengzhou Zezheng Technical Services Ltd. Device for bending a kirschner wire

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957948U (en) * 1982-10-08 1984-04-16 テルモ株式会社 dental syringe needle
JP2001333981A (en) * 2000-03-22 2001-12-04 Nipro Corp Medical needle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4795445A (en) * 1987-03-27 1989-01-03 Becton, Dickinson And Company Hub configuration

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957948U (en) * 1982-10-08 1984-04-16 テルモ株式会社 dental syringe needle
JP2001333981A (en) * 2000-03-22 2001-12-04 Nipro Corp Medical needle

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