JP2011200599A

JP2011200599A - Puncture needle assembly

Info

Publication number: JP2011200599A
Application number: JP2010073427A
Authority: JP
Inventors: Katsutoshi Kurose; 勝俊黒瀬; Maki Fukuda; 真樹福田
Original assignee: Terumo Corp
Current assignee: Terumo Corp
Priority date: 2010-03-26
Filing date: 2010-03-26
Publication date: 2011-10-13
Anticipated expiration: 2030-03-26
Also published as: JP5606119B2

Abstract

PROBLEM TO BE SOLVED: To provide a puncture needle assembly, surely preventing a puncture needle from unwillingly moving a first position where a needle tip is projected from a housing to a second position where the needle tip is stored in the housing.SOLUTION: This puncture needle assembly 1 includes: a puncture needle 3 having the needle tip 311; a housing 2 supporting the puncture needle 3 to be movable to the first position where the needle tip 311 projects and to the second position where the needle tip 311 is stored; a coil spring 4 installed in the housing 2 to energize the puncture needle 3 toward the proximal end; a regulating member 5 installed in the housing 2 to take the regulating state of regulating the puncture needle 3 located at the first position from moving to the second position against the energizing force of the coil spring 4 and the release state of releasing the regulating state and allowing the puncture needle 3 located at the first position from moving to the second position; and an operating member 6 installed in the housing 2 to be movable along its longitudinal direction and performing the operation of displacing the regulating member 5 from the regulating state to the release state.

Description

本発明は、穿刺針組立体に関する。 The present invention relates to a puncture needle assembly.

従来の穿刺針組立体は、鋭利な針先を有する穿刺針と、穿刺針を移動可能に支持する筒状のハウジングと、穿刺針を基端方向に付勢する圧縮コイルバネとを備えている（例えば、特許文献１参照）。この特許文献１に記載の穿刺針組立体は、穿刺針の針先がハウジングから突出した第１の状態と、針先がハウジング内に収納される第２の状態とを取り得るよう構成されている。そして、第１の状態は、穿刺針に突出形成された操作ボタン（アクチュエータ）がハウジングに形成された側孔（保持穴）の縁部に係合することにより維持される。この状態から操作ボタンをハウジングの軸側に向かって押圧操作すると、当該操作ボタンがハウジングの側孔から抜け出して、前記係合が解除される。このとき、穿刺針が圧縮コイルバネの付勢力により基端方向に移動することができ、よって、第２の状態となる。 A conventional puncture needle assembly includes a puncture needle having a sharp needle tip, a cylindrical housing that movably supports the puncture needle, and a compression coil spring that biases the puncture needle in the proximal direction ( For example, see Patent Document 1). The puncture needle assembly described in Patent Document 1 is configured to be able to take a first state in which the needle tip of the puncture needle protrudes from the housing and a second state in which the needle tip is housed in the housing. Yes. The first state is maintained by engaging an operation button (actuator) formed to protrude from the puncture needle with an edge of a side hole (holding hole) formed in the housing. When the operation button is pressed from this state toward the shaft side of the housing, the operation button comes out of the side hole of the housing, and the engagement is released. At this time, the puncture needle can be moved in the proximal direction by the urging force of the compression coil spring, so that the second state is obtained.

しかしながら、特許文献１に記載の穿刺針組立体では、操作ボタンを単に押圧操作するだけで第１の状態から第２の状態へ変化するため、例えばこの穿刺針組立体を用いようとして把持したときに、誤って指先が操作ボタンに触れた場合、当該操作ボタンが不本意に押圧されてしまうという問題があった。前述したように穿刺針組立体は操作ボタンが押圧されると第２の状態となってしまい、針先で生体表面を穿刺することができず、すなわち、使用することができず、結果、未使用状態で廃棄処分しなければならなかった。 However, the puncture needle assembly described in Patent Document 1 changes from the first state to the second state by simply pressing the operation button. For example, when the puncture needle assembly is gripped to be used, In addition, when the fingertip touches the operation button by mistake, the operation button is unintentionally pressed. As described above, the puncture needle assembly enters the second state when the operation button is pressed, and cannot puncture the living body surface with the needle tip, that is, cannot be used. Had to be disposed of in use.

特開２００２−３３０９４５号公報JP 2002-330945 A

本発明の目的は、針先がハウジングから突出する第１の位置から、針先がハウジング内に収納される第２に位置に不本意に穿刺針が移動するのを確実に防止することができる穿刺針組立体を提供することにある。 An object of the present invention can reliably prevent the puncture needle from unintentionally moving from the first position where the needle tip protrudes from the housing to the second position where the needle tip is accommodated in the housing. It is to provide a puncture needle assembly.

このような目的は、下記（１）〜（５）の本発明により達成される。
（１）先端に鋭利な針先を有する針管と、該針管の基端部に固定されたハブとを有する穿刺針と、
先端が開口した先端開口を有する筒状をなすものであり、前記穿刺針を、前記針先が前記先端開口から突出する第１の位置と、該第１の位置から基端方向に移動して、前記針先が収納される第２の位置とに移動可能に支持するハウジングと、
前記ハウジングに設置され、前記穿刺針を基端方向に付勢する付勢部材と、
前記ハウジングに設置され、前記付勢部材の付勢力に抗して、前記第１の位置にある前記穿刺針の前記第２の位置への移動を規制する規制状態と、該規制状態が解除され、前記第１の位置にある前記穿刺針の前記第２の位置への移動を許可する解除状態とを取り得る規制部材と、
前記ハウジングにその長手方向または周方向に沿って移動可能であり、さらに前記ハウジングの軸に接近する方向にも移動可能に設置され、当該接近する方向に移動してから前記ハウジングの長手方向または周方向に沿って移動し、当該移動により、前記規制部材を前記規制状態から前記解除状態に変位させる操作を行なう操作部材とを備えることを特徴とする穿刺針組立体。 Such an object is achieved by the present inventions (1) to (5) below.
(1) a puncture needle having a needle tube having a sharp needle tip at a distal end and a hub fixed to a proximal end portion of the needle tube;
The puncture needle is moved in a proximal direction from the first position where the needle tip protrudes from the distal end opening, and a proximal end direction. A housing movably supported to a second position in which the needle tip is stored;
A biasing member installed in the housing and biasing the puncture needle in the proximal direction;
A restriction state that is installed in the housing and restricts the movement of the puncture needle at the first position to the second position against the urging force of the urging member, and the restriction state is released. A regulating member capable of taking a release state that permits movement of the puncture needle in the first position to the second position;
The housing is movable along the longitudinal direction or circumferential direction of the housing, and is further movably installed in a direction approaching the axis of the housing. After moving in the approaching direction, the housing is moved in the longitudinal direction or circumferential direction. A puncture needle assembly comprising: an operation member that moves along a direction and performs an operation of displacing the restriction member from the restricted state to the released state by the movement.

（２）前記規制部材は、前記操作部材の移動に連動して、前記ハウジングの軸回りに回転し、その回転角度に応じて前記規制状態と前記解除状態とを取り得る上記（１）に記載の穿刺針組立体。 (2) In the above (1), the restriction member rotates around the axis of the housing in conjunction with the movement of the operation member, and can take the restriction state and the release state according to the rotation angle. Puncture needle assembly.

（３）前記規制部材は、筒状をなすものであり、
前記操作部材は、前記規制部材の外周部に対向して配置されており、
前記規制部材の外周部と前記操作部材の前記規制部材の外周部に対向する部分のうちの一方には、カム溝が形成され、他方には、前記カム溝に挿入され、該カム溝内を移動する突部が突出形成され、前記突部が前記カム溝内を移動することにより、前記規制部材が前記ハウジングの軸回りに回転する上記（２）に記載の穿刺針組立体。 (3) The restriction member has a cylindrical shape,
The operation member is disposed to face the outer peripheral portion of the restriction member,
A cam groove is formed in one of the outer peripheral portion of the restricting member and the portion of the operating member facing the outer peripheral portion of the restricting member, and the other is inserted into the cam groove and is inserted into the cam groove. The puncture needle assembly according to (2), wherein the moving protrusion is formed to protrude, and the restricting member rotates around the axis of the housing by moving the protrusion in the cam groove.

（４）前記操作部材は、前記規制部材に対し接近・離間可能に支持されており、前記規制部材から離間した状態では前記突部が前記カム溝内を移動できず、前記規制部材に対し接近した状態では前記突部が前記カム溝内を移動できる上記（３）に記載の穿刺針組立体。 (4) The operation member is supported so as to be able to approach and separate from the restriction member, and the protrusion cannot move in the cam groove in a state of being separated from the restriction member, and approaches the restriction member. The puncture needle assembly according to the above (3), wherein the protrusion can move in the cam groove in a state in which the protrusion is made.

（５）前記ハブは、筒状をなし、その外周部に外径が拡径した拡径部を有し、
前記規制部材は、筒状をなし、その内周部に内径が縮径した縮径部を有し、
前記規制状態では、前記拡径部が前記縮径部に当接して、前記穿刺針の移動が規制され、前記解除状態では、前記拡径部が前記縮径部から外れて、前記穿刺針の移動が可能となる上記（１）ないし（４）のいずれかに記載の穿刺針組立体。 (5) The hub has a cylindrical shape and has an enlarged diameter portion whose outer diameter is enlarged on an outer peripheral portion thereof.
The regulating member has a cylindrical shape, and has a reduced diameter portion whose inner diameter is reduced on the inner peripheral portion thereof.
In the restricted state, the enlarged diameter portion abuts on the reduced diameter portion to restrict movement of the puncture needle, and in the released state, the enlarged diameter portion is disengaged from the reduced diameter portion, and The puncture needle assembly according to any one of (1) to (4), which is movable.

また、本発明の穿刺針組立体では、前記縮径部の内周と前記拡径部の外周とは、それぞれ、先端側から見た輪郭形状が同じ多角形をなし、前記ハウジングの軸上に同心的に配置されており、
前記規制状態と前記解除状態とでは、前記縮径部の内周の前記輪郭形状と前記拡径部の外周の前記輪郭形状との重なりの程度が異なるのが好ましい。 In the puncture needle assembly of the present invention, the inner circumference of the reduced diameter portion and the outer circumference of the enlarged diameter portion are polygons having the same contour shape as viewed from the distal end side, and are on the axis of the housing. Arranged concentrically,
It is preferable that the degree of overlap between the contour shape on the inner periphery of the reduced diameter portion and the contour shape on the outer periphery of the enlarged diameter portion is different between the restricted state and the released state.

また、本発明の穿刺針組立体では、前記穿刺針が前記第２の位置にあるとき、その状態を維持して前記穿刺針が再度前記第１の位置に移動するのを防止するロック手段を備えるのが好ましい。 In the puncture needle assembly according to the present invention, when the puncture needle is in the second position, the lock means for maintaining the state and preventing the puncture needle from moving again to the first position. It is preferable to provide.

また、本発明の穿刺針組立体では、前記ロック手段は、前記第２の位置にある前記穿刺針が前記第１の位置に移動しようとしたときに係合し合う、前記ハブに設けられたハブ側係合部と、前記ハウジングに設けられたハウジング側係合部とで構成されているのが好ましい。 Further, in the puncture needle assembly of the present invention, the locking means is provided on the hub that engages when the puncture needle in the second position attempts to move to the first position. It is preferable that a hub-side engagement portion and a housing-side engagement portion provided in the housing are included.

また、本発明の穿刺針組立体では、前記付勢部材は、前記穿刺針が前記第１の位置および前記第２の位置のいずれの位置にあるときでも前記ハウジング内に位置しているのが好ましい。 In the puncture needle assembly of the present invention, the urging member is located in the housing even when the puncture needle is in either the first position or the second position. preferable.

また、本発明の穿刺針組立体では、前記付勢部材は、圧縮コイルバネで構成されているのが好ましい。 In the puncture needle assembly of the present invention, it is preferable that the urging member is composed of a compression coil spring.

また、本発明の穿刺針組立体では、前記ハブは、筒状をなし、その基端部にチューブが接続されるものであり、
前記針管は、前記ハブを介して、前記チューブと連通するのが好ましい。 Further, in the puncture needle assembly of the present invention, the hub has a cylindrical shape, and a tube is connected to the proximal end portion thereof,
Preferably, the needle tube communicates with the tube via the hub.

また、本発明の穿刺針組立体では、前記ハウジングは、その外周部に突出する開閉可能な一対の翼部を有し、該一対の翼部は、前記第１の位置にある前記穿刺針の前記針先で生体表面を穿刺するときに把持される把持部として機能するのが好ましい。 Further, in the puncture needle assembly of the present invention, the housing has a pair of openable and closable wings projecting on an outer peripheral portion thereof, and the pair of wings is the puncture needle in the first position. It preferably functions as a gripping part that is gripped when the living body surface is punctured with the needle tip.

本発明によれば、操作部材をハウジングの長手方向または周方向に移動させなければ、規制部材を規制状態から解除状態に変位させる操作を行なうことができない。従って、例えば操作部材をハウジングの軸側に単に押圧したとしても規制部材が変位するのが防止される。これにより、穿刺針の誤作動、すなわち、針先がハウジングから突出する第１の位置から、針先がハウジング内に収納される第２に位置に不本意に穿刺針が移動するのを確実に防止することができる。 According to the present invention, unless the operating member is moved in the longitudinal direction or the circumferential direction of the housing, the operation of displacing the regulating member from the regulated state to the released state cannot be performed. Therefore, for example, even if the operating member is simply pressed to the shaft side of the housing, the restricting member is prevented from being displaced. This ensures that the puncture needle is inadvertently moved from the first position where the needle tip protrudes from the housing to the second position where the needle tip is housed in the housing. Can be prevented.

また、操作部材がハウジングの軸に接近する方向に移動してからハウジングの長手方向または周方向に沿って移動するよう構成されている場合には、操作部材（規制部材）に対する誤操作をより確実に防止することができ、その結果、穿刺針の誤作動もより確実に防止することができる。 Further, when the operation member is configured to move in the longitudinal direction or the circumferential direction of the housing after moving in a direction approaching the shaft of the housing, an erroneous operation on the operation member (regulating member) is more reliably performed. As a result, malfunction of the puncture needle can be prevented more reliably.

本発明の穿刺針組立体の実施形態を示す斜視図である。It is a perspective view which shows embodiment of the puncture needle assembly of this invention. 図１に示す穿刺針組立体の作動状態を順に示す縦断面図（図１中のＡ−Ａ線断面図）である。FIG. 2 is a longitudinal cross-sectional view (cross-sectional view taken along the line AA in FIG. 1) sequentially illustrating the operating state of the puncture needle assembly shown in FIG. 1. 図１に示す穿刺針組立体の作動状態を順に示す縦断面図（図１中のＡ−Ａ線断面図）である。FIG. 2 is a longitudinal cross-sectional view (cross-sectional view taken along the line AA in FIG. 1) sequentially illustrating the operating state of the puncture needle assembly shown in FIG. 1. 図３に示す状態の穿刺針組立体の基端部付近の縦断面図（図１中のＢ−Ｂ線断面図）である。FIG. 4 is a longitudinal sectional view (a sectional view taken along line BB in FIG. 1) in the vicinity of the proximal end portion of the puncture needle assembly in the state shown in FIG. 3. 図１に示す穿刺針組立体が有する穿刺針、規制部材および操作部材の位置関係を示す分解斜視図である。It is a disassembled perspective view which shows the positional relationship of the puncture needle which the puncture needle assembly shown in FIG. 1 has, a control member, and an operation member. 図５に示す穿刺針、規制部材および操作部材の作動状態を順に示す斜視図である。It is a perspective view which shows the operation state of the puncture needle shown in FIG. 5, a control member, and an operation member in order. 図５に示す穿刺針、規制部材および操作部材の作動状態を順に示す斜視図である。It is a perspective view which shows the operation state of the puncture needle shown in FIG. 5, a control member, and an operation member in order. 図５に示す穿刺針、規制部材および操作部材の作動状態を順に示す斜視図である。It is a perspective view which shows the operation state of the puncture needle shown in FIG. 5, a control member, and an operation member in order.

以下、本発明の穿刺針組立体を添付図面に示す好適な実施形態に基づいて詳細に説明する。
図１は、本発明の穿刺針組立体の実施形態を示す斜視図、図２および図３は、それぞれ、図１に示す穿刺針組立体の作動状態を順に示す縦断面図（図１中のＡ−Ａ線断面図）、図４は、図３に示す状態の穿刺針組立体の基端部付近の縦断面図（図１中のＢ−Ｂ線断面図）、図５は、図１に示す穿刺針組立体が有する穿刺針、規制部材および操作部材の位置関係を示す分解斜視図、図６〜図８は、それぞれ、図５に示す穿刺針、規制部材および操作部材の作動状態を順に示す斜視図である。なお、以下では、説明の都合上、図１〜図８中の右側を「基端」、左側を「先端」と言う。 Hereinafter, a puncture needle assembly of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
FIG. 1 is a perspective view showing an embodiment of the puncture needle assembly of the present invention, and FIGS. 2 and 3 are longitudinal sectional views sequentially showing operating states of the puncture needle assembly shown in FIG. 1 (in FIG. 1). 4 is a longitudinal sectional view of the vicinity of the proximal end of the puncture needle assembly in the state shown in FIG. 3 (sectional view taken along the line BB in FIG. 1), and FIG. FIG. 6 to FIG. 8 show the operating states of the puncture needle, the regulating member, and the operating member shown in FIG. 5, respectively. It is a perspective view shown in order. In the following, for convenience of explanation, the right side in FIGS. 1 to 8 is referred to as “base end”, and the left side is referred to as “tip”.

図１に示す穿刺針組立体１は、例えば静注針や採血針として使用することができるものであり、ハウジング２と、ハウジング２に移動可能に支持された穿刺針３と、穿刺針３を基端方向に付勢する付勢部材としての圧縮コイルバネ（以下単に「コイルバネ」という）４と、穿刺針３の移動を規制する規制部材５と、規制部材５に対する操作を行なう操作部材６とを備えている。この穿刺針組立体１は、穿刺針３がハウジング２に対し出没自在に構成されている。そして、穿刺針組立体１を使用する際には、穿刺針３がハウジング２から突出した図２に示す状態で、例えば皮膚等の生体表面に対する穿刺を行なうことができる。また、穿刺針組立体１の使用後には、穿刺針３がハウジング２内に収納された図３に示す状態となり、その状態で破棄に供される。また、穿刺針３は、硬質のハウジング２内に収納されるため、例えば廃棄中に針曲りや針折れが生じるのを確実に防止することができる。 A puncture needle assembly 1 shown in FIG. 1 can be used as, for example, an intravenous injection needle or a blood collection needle. The puncture needle assembly 1 includes a housing 2, a puncture needle 3 movably supported by the housing 2, and a puncture needle 3. A compression coil spring (hereinafter simply referred to as “coil spring”) 4 as an urging member for urging in the proximal direction, a restriction member 5 for restricting movement of the puncture needle 3, and an operation member 6 for operating the restriction member 5. I have. The puncture needle assembly 1 is configured such that the puncture needle 3 can be moved into and out of the housing 2. When the puncture needle assembly 1 is used, the puncture needle 3 can be punctured on the surface of a living body such as skin in the state shown in FIG. Further, after use of the puncture needle assembly 1, the puncture needle 3 is housed in the housing 2 and is in the state shown in FIG. Further, since the puncture needle 3 is housed in the hard housing 2, it is possible to reliably prevent needle bending or needle breakage during disposal, for example.

なお、図２に示す状態で、穿刺針３の針先３１１を覆う、例えばポリプロピレンで構成された管状をなすキャップ（図示せず）が装着されていてもよい。この場合、前記キャップを外して穿刺針組立体１を使用するまで穿刺針３の針先３１１を保護することができ、よって、針先３１１の破損や針先３１１による誤穿刺等を確実に防止することができる。 In the state shown in FIG. 2, a tubular cap (not shown) made of, for example, polypropylene that covers the needle tip 311 of the puncture needle 3 may be attached. In this case, the needle tip 311 of the puncture needle 3 can be protected until the cap is removed and the puncture needle assembly 1 is used, so that the needle tip 311 can be reliably prevented from being damaged or accidentally punctured by the needle tip 311. can do.

以下、穿刺針組立体１の各部の構成について説明する。
図１〜図３に示すように、ハウジング２は、筒体で構成されたハウジング本体２１と、ハウジング本体２１の外周部２１１に突出する一対の翼部２２ａ、２２ｂとを有している。 Hereinafter, the structure of each part of the puncture needle assembly 1 will be described.
As shown in FIGS. 1 to 3, the housing 2 includes a housing main body 21 formed of a cylindrical body, and a pair of wing portions 22 a and 22 b protruding from the outer peripheral portion 211 of the housing main body 21.

ハウジング本体２１は、その先端が開口した先端開口２１２と、基端が開口した基端開口２１３とを有している。ハウジング本体２１は、その長手方向に沿って穿刺針３を移動可能に支持することができる。これにより、穿刺針３は、針先３１１が先端開口２１２から突出する第１の位置（図２参照）から、針先３１１がハウジング本体２１内に収納される第２の位置（図３参照）に移動することができる。 The housing body 21 has a distal end opening 212 having a distal end opened and a proximal end opening 213 having a proximal end opened. The housing main body 21 can support the puncture needle 3 so as to be movable along its longitudinal direction. Accordingly, the puncture needle 3 is moved from the first position (see FIG. 2) where the needle tip 311 protrudes from the distal end opening 212 to the second position (see FIG. 3) where the needle tip 311 is housed in the housing body 21. Can be moved to.

また、図１に示すように、ハウジング本体２１の外周部２１１には、その基端部に側面視で「コ」字状をなすスリット２１４がハウジング本体２１の軸を介して２つ形成されている。各スリット２１４は、それぞれ、外周部２１１を貫通している。そして、各スリット２１４で囲まれた部分は、それぞれ、先端が固定端、基端が自由端となる片持支持された弾性片２３となる。図４に示すように、各弾性片２３の自由端には、それぞれ、内側に向かって突出した突部で構成されたハウジング側係合部２３１が形成されている。このハウジング側係合部２３１は、後述するロック手段７の一部として機能する。 Further, as shown in FIG. 1, two slits 214 having a “U” shape in a side view are formed on the outer peripheral portion 211 of the housing body 21 through the shaft of the housing body 21. Yes. Each slit 214 penetrates the outer peripheral portion 211. And the part enclosed by each slit 214 becomes the elastic piece 23 by which the front-end | tip was fixed-supported and the base end became a free end, and was cantilevered. As shown in FIG. 4, at the free end of each elastic piece 23, a housing side engaging portion 231 configured with a protruding portion protruding inward is formed. The housing side engaging portion 231 functions as a part of the locking unit 7 described later.

また、ハウジング本体２１の外周部２１１には、その先端部に一対の翼部２２ａ、２２ｂが突出形成されている。翼部２２ａと翼部２２ｂとは、ハウジング本体２１の軸を介して配置されている。このような翼部２２ａと翼部２２ｂとは、それぞれ、可撓性を有する小片で構成され、互いに接近・離間可能、すなわち、開閉可能なものである。第１の位置にある穿刺針３の針先３１１で生体表面を穿刺するときには、閉じた状態の翼部２２ａと翼部２２ｂとを指先で把持して、その穿刺操作を容易に行なうことができる。このように翼部２２ａと翼部２２ｂとは、把持部として機能する。また、穿刺状態の穿刺針組立体１を生体表面に留置するときには、開いた状態の翼部２２ａと翼部２２ｂとを生体表面に例えば粘着テープで固定することができる。このように翼部２２ａと翼部２２ｂとは、固定部としても機能する。 The outer peripheral portion 211 of the housing body 21 is formed with a pair of wing portions 22a and 22b protruding from the tip portion. The wing part 22 a and the wing part 22 b are arranged via the shaft of the housing body 21. Each of the wing portion 22a and the wing portion 22b is composed of a small piece having flexibility, and can be moved toward and away from each other, that is, can be opened and closed. When puncturing the living body surface with the needle tip 311 of the puncture needle 3 at the first position, the closed wing portion 22a and wing portion 22b can be grasped with the fingertips and the puncture operation can be easily performed. . Thus, the wing part 22a and the wing part 22b function as a gripping part. Further, when the puncture needle assembly 1 in the puncture state is placed on the surface of the living body, the opened wing portion 22a and wing portion 22b can be fixed to the surface of the living body with, for example, an adhesive tape. Thus, the wing part 22a and the wing part 22b also function as a fixed part.

なお、ハウジング本体２１の構成材料としては、特に限定されないが、例えば、各種樹脂材料を用いることができ、その中でも特にポリプロピレンまたはポリカーボネートが好ましい。また、各翼部２２ａ、２２ｂの構成材料としては、特に限定されないが、例えば、各種樹脂材料を用いることができ、その中でも特にポリプロピレンまたはポリ塩化ビニルが好ましい。 In addition, although it does not specifically limit as a constituent material of the housing main body 21, For example, various resin materials can be used and a polypropylene or a polycarbonate is especially preferable among these. Further, the constituent material of each of the wing portions 22a and 22b is not particularly limited. For example, various resin materials can be used, and among them, polypropylene or polyvinyl chloride is particularly preferable.

図２〜図７に示すように、穿刺針３は、針管３１と、針管３１の基端部に固定されたハブ３２とで構成されている。 As shown in FIGS. 2 to 7, the puncture needle 3 includes a needle tube 31 and a hub 32 fixed to the proximal end portion of the needle tube 31.

針管３１は、その先端に鋭利な針先３１１を有している。
ハブ３２は、筒状をなし、針管３１の基端部に例えば嵌合により固定されている。 The needle tube 31 has a sharp needle tip 311 at its tip.
The hub 32 has a cylindrical shape and is fixed to the proximal end portion of the needle tube 31 by, for example, fitting.

ハブ３２の基端部は、チューブ２０の先端部２０１が接続される接続部３３となっている。接続部３３は、その外径が段階的に変化しており、チューブ２０が不本意に接続部３３から離脱するのを確実に防止することができる。また、ハブ３２を介して、針管３１とチューブ２０とが連通する。 The proximal end portion of the hub 32 is a connection portion 33 to which the distal end portion 201 of the tube 20 is connected. The outer diameter of the connecting portion 33 changes stepwise, and the tube 20 can be reliably prevented from unintentionally leaving the connecting portion 33. Further, the needle tube 31 and the tube 20 communicate with each other through the hub 32.

なお、チューブ２０の基端部には、コネクタ３０が設置されている。コネクタ３０に、輸液バッグを備えた輸液ライン（図示せず）を接続すると、輸液投与を行なうことができる。また、コネクタ３０にシリンジや採血管を接続すると採血を行なうことができる。 A connector 30 is installed at the proximal end of the tube 20. When an infusion line (not shown) having an infusion bag is connected to the connector 30, infusion administration can be performed. Blood can be collected by connecting a syringe or blood collection tube to the connector 30.

図５に示すように、ハブ３２の外周部の長手方向の途中には、その外径が拡径した拡径部で構成されたハブ側係合部３４が設けられている。このハブ側係合部３４の外周３４１の先端側から見た輪郭形状は、多角形（図示の構成ではほぼ正方形）をなしている。 As shown in FIG. 5, in the middle of the outer peripheral portion of the hub 32 in the longitudinal direction, a hub-side engagement portion 34 configured by a diameter-expanded portion whose outer diameter is increased is provided. The contour shape of the hub side engaging portion 34 viewed from the front end side of the outer periphery 341 is a polygon (substantially square in the illustrated configuration).

ハブ側係合部３４は、ハウジング２のハウジング側係合部２３１とともに、ロック手段７として機能する部分である。ロック手段７は、穿刺針３が第２の位置にあるとき、その状態を維持して穿刺針３が再度第１の位置に移動するのを防止するものである。図４に示す状態では、穿刺針３が第２の位置にある。この穿刺針３をチューブ２０を介して先端方向に押し込んだ場合、当該穿刺針３は、第１の位置に戻ろう（移動しよう）とするが、ハブ側係合部３４とハウジング２のハウジング側係合部２３１とが係合し合うこととなる。これにより、穿刺針３の第１の位置への戻りを確実に防止することができ、よって、使用済み状態の穿刺針３の針先３１１で例えば指先等を誤って穿刺してしまうのを確実に防止することができる。 The hub side engaging portion 34 is a portion that functions as the locking means 7 together with the housing side engaging portion 231 of the housing 2. When the puncture needle 3 is in the second position, the lock means 7 maintains that state and prevents the puncture needle 3 from moving again to the first position. In the state shown in FIG. 4, the puncture needle 3 is in the second position. When the puncture needle 3 is pushed through the tube 20 in the distal direction, the puncture needle 3 tries to return (move) to the first position, but the hub side engaging portion 34 and the housing 2 side of the housing 2 The engaging part 231 is engaged with each other. As a result, it is possible to reliably prevent the puncture needle 3 from returning to the first position, and it is thus ensured that the fingertip 311 of the used puncture needle 3 is punctured by mistake, for example, a fingertip. Can be prevented.

なお、針管３１の構成材料としては、特に限定されず、例えば、ステンレス鋼等の各種金属材料が挙げられる。また、ハブ３２の構成材料としては、特に限定されず、例えば、各種樹脂材料を用いることができ、その中でも特にポリカーボネートまたはポリアセタールが好ましい。 In addition, it does not specifically limit as a constituent material of the needle tube 31, For example, various metal materials, such as stainless steel, are mentioned. In addition, the constituent material of the hub 32 is not particularly limited, and for example, various resin materials can be used, and among them, polycarbonate or polyacetal is particularly preferable.

図２、図３に示すように、ハウジング２には、線材４３を螺旋状に巻回してなるコイルバネ４が収納されている。コイルバネ４は、圧縮状態で、先端４１がハウジング本体２１の先端内周部に形成された段差部２１５に当接し、基端４２が穿刺針３のハブ３２の先端３２１に当接している。このように設置されたコイルバネ４により、穿刺針３を基端方向に付勢することができ、よって、第１の位置にある穿刺針３が基端方向に向かって第２の位置に確実に移動することができる。 As shown in FIGS. 2 and 3, the housing 2 houses a coil spring 4 formed by winding a wire 43 in a spiral shape. In the compressed state, the coil spring 4 has a distal end 41 that is in contact with a stepped portion 215 formed on the inner periphery of the distal end of the housing body 21, and a proximal end 42 that is in contact with the distal end 321 of the hub 32 of the puncture needle 3. The coil spring 4 installed in this way can urge the puncture needle 3 in the proximal direction, so that the puncture needle 3 in the first position is surely in the second position toward the proximal direction. Can move.

なお、穿刺針３の針管３１は、コイルバネ４の内側のほぼ中心部を挿通している。これにより、穿刺針３を安定して付勢することができる。 In addition, the needle tube 31 of the puncture needle 3 is inserted through the substantially central portion inside the coil spring 4. Thereby, the puncture needle 3 can be urged stably.

また、コイルバネ４は、穿刺針３が第１の位置および第２の位置のいずれの位置にあるときでもハウジング２内に位置している。これにより、例えば、穿刺針組立体１を操作する際に、指先が隣接する線材４３同士の間に挟まれるのを確実に防止することができ、よって、安全に操作を行なうことができる。 The coil spring 4 is located in the housing 2 even when the puncture needle 3 is in either the first position or the second position. Thereby, for example, when the puncture needle assembly 1 is operated, it is possible to reliably prevent the fingertips from being pinched between the adjacent wire rods 43, and thus the operation can be performed safely.

コイルバネ４の構成材料としては、特に限定されず、例えば、各種金属材料や各種樹脂材料を用いることができ、その中でも特にステンレス鋼が好ましい。 The constituent material of the coil spring 4 is not particularly limited. For example, various metal materials and various resin materials can be used, and among these, stainless steel is particularly preferable.

図２、図３に示すように、ハウジング２内には、その長手方向の途中に規制部材５が配置されている。規制部材５は、穿刺針３が挿通しており、当該穿刺針３に対する、図２、図６に示す規制状態と、その規制状態が解除される、図３、図７、図８に示す解除状態とを取り得る。規制状態では、コイルバネ４の付勢力に抗して、第１の位置にある穿刺針３の第２の位置への移動が規制される。解除状態では、第１の位置にある穿刺針３の第２の位置への移動が許可される。 As shown in FIGS. 2 and 3, the regulating member 5 is disposed in the housing 2 in the middle of the longitudinal direction. The restricting member 5 is inserted through the puncture needle 3, and the restriction state shown in FIGS. 2 and 6 with respect to the puncture needle 3 and the restriction state are released. The release state shown in FIG. 3, FIG. 7, and FIG. The state can be taken. In the restricted state, the movement of the puncture needle 3 at the first position to the second position is restricted against the biasing force of the coil spring 4. In the released state, movement of the puncture needle 3 at the first position to the second position is permitted.

図５〜図８に示すように、規制部材５は、リング状（筒状）をなすものである。
規制部材５の外周部には、後述する操作部材６のフォロア部（突部）６４が挿入されるカム溝５２が形成されている。カム溝５２は、規制部材５の軸に対し傾斜した方向に沿って形成されている。そして、操作部材６を基端方向に引張り操作すると、操作部材６のフォロア部６４がカム溝５２内を移動する。これにより、操作部材６のフォロア部６４がカム溝５２の側壁（側面）を押圧することとなり、よって、規制部材５がハウジング２の軸回りに回転することができる。 As shown in FIGS. 5 to 8, the restricting member 5 has a ring shape (tubular shape).
A cam groove 52 into which a follower part (projection part) 64 of the operation member 6 described later is inserted is formed on the outer peripheral part of the regulating member 5. The cam groove 52 is formed along a direction inclined with respect to the axis of the regulating member 5. When the operation member 6 is pulled in the proximal direction, the follower portion 64 of the operation member 6 moves in the cam groove 52. As a result, the follower portion 64 of the operation member 6 presses the side wall (side surface) of the cam groove 52, so that the regulating member 5 can rotate around the axis of the housing 2.

また、規制部材５の内周部には、その内径が縮径した縮径部で構成された規制部材側係合部５１が設けられている。この規制部材側係合部５１の内周５１１の先端側から見た輪郭形状は、ハブ側係合部３４の外周３４１の先端側から見た輪郭形状と同じ、多角形（図示の構成ではほぼ正方形）をなしている。 In addition, a regulating member side engagement portion 51 configured by a reduced diameter portion whose inner diameter is reduced is provided on the inner peripheral portion of the regulating member 5. The contour shape viewed from the front end side of the inner periphery 511 of the restricting member side engaging portion 51 is the same polygon as the contour shape viewed from the front end side of the outer periphery 341 of the hub side engaging portion 34 (almost in the configuration shown in the figure). Square).

ハウジング２内では、規制部材側係合部５１の内周５１１とハブ側係合部３４の外周３４１とは、ハウジング２の軸上に同心的に配置されている。前述したように規制部材５がハウジング２の軸回りに回転すると、その回転角度に応じて、規制部材側係合部５１の内周５１１の輪郭形状とハブ側係合部３４の外周３４１の輪郭との重なりの程度が異なる（図６〜図８参照）。 In the housing 2, the inner periphery 511 of the restricting member side engaging portion 51 and the outer periphery 341 of the hub side engaging portion 34 are disposed concentrically on the shaft of the housing 2. As described above, when the restricting member 5 rotates about the axis of the housing 2, the contour shape of the inner periphery 511 of the restricting member side engaging portion 51 and the contour of the outer periphery 341 of the hub side engaging portion 34 according to the rotation angle. Are different in degree of overlap (see FIGS. 6 to 8).

図６（図２も同様）に示すように、規制部材側係合部５１の内周５１１の輪郭とハブ側係合部３４の外周３４１の輪郭との重なりの程度が最小となる、すなわち、規制部材側係合部５１の内周５１１の輪郭からハブ側係合部３４の外周３４１の輪郭の一部がはみ出た状態では、ハブ側係合部３４の基端面が規制部材側係合部５１の先端面に当接、係合する。これにより、穿刺針の移動が規制される規制状態となる。 As shown in FIG. 6 (also in FIG. 2), the degree of overlap between the contour of the inner periphery 511 of the restricting member side engaging portion 51 and the contour of the outer periphery 341 of the hub side engaging portion 34 is minimized. When a part of the contour of the outer periphery 341 of the hub side engaging portion 34 protrudes from the contour of the inner periphery 511 of the restricting member side engaging portion 51, the base end surface of the hub side engaging portion 34 is the restricting member side engaging portion. 51 is brought into contact with and engaged with the front end surface. Thereby, it will be in the control state in which the movement of a puncture needle is controlled.

また、図７、図８（図３も同様）に示すように、規制部材側係合部５１の内周５１１の輪郭とハブ側係合部３４の外周３４１の輪郭との重なりの程度が最大となる、すなわち、先端側から見たときに規制部材側係合部５１の内周５１１がハブ側係合部３４の外周３４１全体を包含する状態では、ハブ側係合部３４が規制部材側係合部５１から外れる。これにより、穿刺針３に対する規制部材５の規制が解除され、当該穿刺針３が移動可能な解除状態となる。 7 and 8 (also in FIG. 3), the degree of overlap between the contour of the inner periphery 511 of the restricting member side engaging portion 51 and the contour of the outer periphery 341 of the hub side engaging portion 34 is maximum. That is, in a state where the inner periphery 511 of the restricting member side engaging portion 51 includes the entire outer periphery 341 of the hub side engaging portion 34 when viewed from the front end side, the hub side engaging portion 34 is on the restricting member side. The engagement part 51 is disengaged. Thereby, the restriction of the restriction member 5 with respect to the puncture needle 3 is released, and the puncture needle 3 enters a released state in which the puncture needle 3 is movable.

このように穿刺針組立体１では、操作部材６で規制部材５を回転操作することができ、その回転角度に応じて、規制部材５が規制状態と解除状態とに確実に変位するよう構成されている。 As described above, the puncture needle assembly 1 can be configured to rotate the restriction member 5 with the operation member 6 and to be surely displaced between the restriction state and the release state according to the rotation angle. ing.

なお、規制部材５および操作部材６の構成材料としては、特に限定されず、それぞれ、例えば、各種樹脂材料を用いることができ、その中でも特にポリプロピレンまたはポリアセタールが好ましい。 In addition, it does not specifically limit as a constituent material of the control member 5 and the operation member 6, For example, various resin materials can be used, respectively, Especially, a polypropylene or polyacetal is preferable.

図２、図３に示すように、操作部材６は、ハウジング２の外周部２１１に形成された貫通孔２１６に挿入、設置されている。この操作部材６は、ハウジング２の軸に接近する方向（図２、図６中の矢印Ａ方向）と、ハウジング２の軸方向（図３、図７中の矢印Ｂ方向）とに移動するものであり、矢印Ａ方向に移動してから矢印Ｂ方向に移動することができる。そして、操作部材６を矢印Ｂ方向に移動することにより、前述したように、規制部材５を回転操作することができる。 As shown in FIGS. 2 and 3, the operating member 6 is inserted and installed in a through hole 216 formed in the outer peripheral portion 211 of the housing 2. The operating member 6 moves in a direction approaching the axis of the housing 2 (direction of arrow A in FIGS. 2 and 6) and an axial direction of the housing 2 (direction of arrow B in FIGS. 3 and 7). It is possible to move in the direction of arrow A after moving in the direction of arrow A. Then, by moving the operating member 6 in the arrow B direction, the restricting member 5 can be rotated as described above.

なお、ハウジング２には、操作部材６を矢印Ａ方向と反対方向に付勢する付勢部（図示せず）が設けられている。これにより、例えば指先が誤って操作部材６に触れて当該操作部材６が矢印Ａ方向に押圧されたとしても、その押圧力を解除すれば、操作部材６が迅速かつ確実に押圧前の状態に戻ることができる。これにより、操作部材６が矢印Ｂ方向に移動するのを確実に防止することができ、よって、規制部材５が規制状態から解除状態となって、穿刺針３が不本意に退避してしまうのを確実に防止することができる。 The housing 2 is provided with a biasing portion (not shown) for biasing the operation member 6 in the direction opposite to the arrow A direction. Thereby, for example, even if the fingertip accidentally touches the operation member 6 and the operation member 6 is pressed in the direction of arrow A, the operation member 6 can be quickly and surely brought into a state before being pressed by releasing the pressing force. You can go back. As a result, it is possible to reliably prevent the operating member 6 from moving in the direction of the arrow B. Therefore, the restricting member 5 is released from the restricted state, and the puncture needle 3 is retreated unintentionally. Can be reliably prevented.

また、操作部材６は、小片で構成され、その表面６１が外方に向かって露出し、裏面６２が規制部材５の外周部のカム溝５２が形成された部分に対向している。表面６１には、その一部が***した***部６３が形成されている。この***部６３は、操作部材６を移動する際に指を当てることができる指当て部として機能する。裏面６２には、規制部材５のカム溝５２に挿入される円柱状のフォロア部６４が突出形成されている。 Further, the operation member 6 is composed of small pieces, the front surface 61 is exposed outward, and the back surface 62 is opposed to the portion where the cam groove 52 of the outer peripheral portion of the regulating member 5 is formed. The surface 61 is formed with a raised portion 63 that is partially raised. The raised portion 63 functions as a finger contact portion that can be touched with a finger when the operation member 6 is moved. A columnar follower portion 64 that is inserted into the cam groove 52 of the regulating member 5 is formed on the rear surface 62 so as to protrude.

操作部材６は、前述したように矢印Ａ方向に移動することができるため、規制部材５に対し接近・離間可能である。換言すれば、操作部材６は、矢印Ａ方向に移動する前は規制部材５から離間した状態となり、矢印Ａ方向に移動した後は規制部材５に接近した状態となる。そして、操作部材６が規制部材５から離間した状態では、操作部材６の一対の羽部６５がそれぞれハウジング本体２１の貫通孔２１６の上部に設けられた溝２１７に当接して（係合して）、フォロア部６４が規制部材５のカム溝５２内を移動することができない（図２、図６参照）。一方、操作部材６が規制部材５に接近した状態では、操作部材６の一対の羽部６５がそれぞれハウジング本体２１の溝２１７から退避して、フォロア部６４が規制部材５のカム溝５２内を移動可能となる（図３、図７参照）。この状態で操作部材６を矢印Ｂ方向に引張れば、規制部材５を回転させることができる。 Since the operation member 6 can move in the direction of the arrow A as described above, the operation member 6 can approach and separate from the restriction member 5. In other words, the operating member 6 is in a state of being separated from the regulating member 5 before moving in the direction of the arrow A, and is in a state of approaching the regulating member 5 after moving in the direction of the arrow A. In a state where the operation member 6 is separated from the regulating member 5, the pair of wing portions 65 of the operation member 6 are in contact with (engaged with) the grooves 217 provided in the upper portions of the through holes 216 of the housing body 21. ), The follower portion 64 cannot move in the cam groove 52 of the restricting member 5 (see FIGS. 2 and 6). On the other hand, in a state in which the operation member 6 is close to the restriction member 5, the pair of wing portions 65 of the operation member 6 are retracted from the grooves 217 of the housing body 21, and the follower portion 64 is moved in the cam groove 52 of the restriction member 5. It becomes possible to move (see FIGS. 3 and 7). If the operating member 6 is pulled in the arrow B direction in this state, the regulating member 5 can be rotated.

なお、離間した状態でも、フォロア部６４がカム溝５２に挿入されることで、操作部材６を操作しないのに、規制部材５が回転することを防止することができる。 Even in the separated state, the follower portion 64 is inserted into the cam groove 52, so that it is possible to prevent the regulating member 5 from rotating without operating the operating member 6.

このように、穿刺針組立体１では、操作部材６を矢印Ａ方向に一旦押圧しなければ、矢印Ｂ方向に引張ることができない、すなわち、操作部材６の操作には２つの段階がある。さらに、この２つの段階を経なれれば、規制部材５を回転操作して、第１の位置にある穿刺針３を第２の位置へ移動させることができない。従って、穿刺針組立体１では、例えば操作部材６を単に押圧したとしても規制部材５を回転操作するまでには至らず、よって、穿刺針３が第１の位置から第２の位置に不本意に移動する誤作動を確実に防止することができる。 Thus, in the puncture needle assembly 1, the operation member 6 cannot be pulled in the direction of the arrow B unless it is once pressed in the direction of the arrow A. That is, the operation of the operation member 6 has two stages. Furthermore, after passing through these two stages, the restricting member 5 cannot be rotated to move the puncture needle 3 in the first position to the second position. Therefore, in the puncture needle assembly 1, even if the operation member 6 is simply pressed, for example, the regulation member 5 is not rotated, and therefore the puncture needle 3 is unwilling to move from the first position to the second position. It is possible to reliably prevent a malfunction that moves to the position.

また、一般的に、穿刺針組立体１の操作者にとっては、「押圧する」という動作は、「引張る」という動作よりも安易な動作である。従来の穿刺針組立体では、操作ボタン（操作部材）を押圧するのみであったため、不注意で操作ボタンを操作してしまうことがあった。しかしながら、本発明の穿刺針組立体１では、「押圧」よりも意識を必要とする「引張り」でも操作部材６を操作するよう構成されているため、注意して操作部材６を操作することができる。これにより、規制部材５に対する誤操作をより確実に防止することができ、その結果、穿刺針３の誤作動も確実に防止することができる。 In general, for the operator of the puncture needle assembly 1, the operation of “pressing” is easier than the operation of “pulling”. In the conventional puncture needle assembly, since the operation button (operation member) is only pressed, the operation button may be inadvertently operated. However, since the puncture needle assembly 1 of the present invention is configured to operate the operation member 6 even by “pulling” that requires more consciousness than “pressing”, the operation member 6 can be operated with care. it can. Thereby, the erroneous operation with respect to the restricting member 5 can be prevented more reliably, and as a result, the malfunction of the puncture needle 3 can also be reliably prevented.

以上、本発明の穿刺針組立体を図示の実施形態について説明したが、本発明は、これに限定されるものではなく、穿刺針組立体を構成する各部は、同様の機能を発揮し得る任意の構成のものと置換することができる。また、任意の構成物が付加されていてもよい。 The puncture needle assembly of the present invention has been described above with respect to the illustrated embodiment. However, the present invention is not limited to this, and each part constituting the puncture needle assembly may be any unit that can exhibit the same function. It can be replaced with the configuration of Moreover, arbitrary components may be added.

また、前記実施形態では規制部材にカム溝が形成され、操作部材にフォロア部（突部）が形成されているが、これに限定されず、例えば、操作部材にカム溝が形成され、規制部材にカム溝が形成されていてもよい。 Moreover, in the said embodiment, although the cam groove is formed in the control member and the follower part (protrusion part) is formed in the operation member, it is not limited to this, For example, a cam groove is formed in the operation member, and a control member The cam groove may be formed in.

また、規制部材の規制部材側係合部（縮径部）の内周の先端側から見た輪郭形状と、ハブのハブ側係合部（拡径部）の外周の先端側から見た輪郭形状とは、それぞれ、前記実施形態では正方形（四角形）をなしているが、これに限定されず、例えば、三角形、五角形、六角形等の多角形をなしていてもよいし、その他、楕円形や長円形をなしていてもよい。 Also, the contour shape seen from the inner peripheral tip side of the regulating member side engaging portion (reduced diameter portion) of the regulating member and the contour seen from the outer peripheral tip side of the hub side engaging portion (expanded diameter portion) of the hub The shapes are squares (quadrangles) in the above embodiment, but are not limited thereto, and may be polygons such as triangles, pentagons, hexagons, etc. Or may be oval.

また、操作部材は、前記実施形態ではハウジングの軸に接近する方向とハウジングの長手方向（軸方向）とに順に移動可能に設置されているが、これに限定されず、例えば、ハウジングの軸に接近する方向とハウジングの周方向とに順に移動可能に設置されていてもよし、ハウジングの軸に接近する方向への移動が規制され、ハウジングの長手方向または周方向のみに移動可能に設置されていてもよい。 Further, in the above-described embodiment, the operation member is installed so as to be able to move sequentially in the direction approaching the axis of the housing and the longitudinal direction (axial direction) of the housing. However, the operation member is not limited to this. It may be installed so as to be able to move sequentially in the approaching direction and the circumferential direction of the housing, or the movement in the direction approaching the housing axis is restricted, and it is installed so as to be movable only in the longitudinal direction or circumferential direction of the housing. May be.

１穿刺針組立体
２ハウジング
２１ハウジング本体
２１１外周部
２１２先端開口
２１３基端開口
２１４スリット
２１５段差部
２１６貫通孔
２１７溝
２２ａ、２２ｂ翼部
２３弾性片
２３１ハウジング側係合部
３穿刺針
３１針管
３１１針先
３２ハブ
３２１先端
３３接続部
３４ハブ側係合部
３４１外周
４圧縮コイルバネ（コイルバネ）
４１先端
４２基端
４３線材
５規制部材
５１規制部材側係合部
５１１内周
５２カム溝
６操作部材
６１表面
６２裏面
６３ ***部
６４フォロア部（突部）
６５羽部
７ロック手段
２０チューブ
２０１先端部
３０コネクタ DESCRIPTION OF SYMBOLS 1 Puncture needle assembly 2 Housing 21 Housing main body 211 Outer peripheral part 212 Front end opening 213 Base end opening 214 Slit 215 Step part 216 Through hole 217 Groove 22a, 22b Wing part 23 Elastic piece 231 Housing side engagement part 3 Puncture needle 31 Needle tube 311 Needle tip 32 Hub 321 Tip 33 Connection part 34 Hub side engagement part 341 Outer periphery 4 Compression coil spring (coil spring)
41 distal end 42 proximal end 43 wire 5 regulating member 51 regulating member side engaging portion 511 inner circumference 52 cam groove 6 operation member 61 front surface 62 back surface 63 raised portion 64 follower portion (projecting portion)
65 Wings 7 Locking means 20 Tube 201 Tip 30 Connector

Claims

先端に鋭利な針先を有する針管と、該針管の基端部に固定されたハブとを有する穿刺針と、
先端が開口した先端開口を有する筒状をなすものであり、前記穿刺針を、前記針先が前記先端開口から突出する第１の位置と、該第１の位置から基端方向に移動して、前記針先が収納される第２の位置とに移動可能に支持するハウジングと、
前記ハウジングに設置され、前記穿刺針を基端方向に付勢する付勢部材と、
前記ハウジングに設置され、前記付勢部材の付勢力に抗して、前記第１の位置にある前記穿刺針の前記第２の位置への移動を規制する規制状態と、該規制状態が解除され、前記第１の位置にある前記穿刺針の前記第２の位置への移動を許可する解除状態とを取り得る規制部材と、
前記ハウジングにその長手方向または周方向に沿って移動可能であり、さらに前記ハウジングの軸に接近する方向にも移動可能に設置され、当該接近する方向に移動してから前記ハウジングの長手方向または周方向に沿って移動し、当該移動により、前記規制部材を前記規制状態から前記解除状態に変位させる操作を行なう操作部材とを備えることを特徴とする穿刺針組立体。 A puncture needle having a needle tube having a sharp needle tip at the tip, and a hub fixed to the proximal end portion of the needle tube;
The puncture needle is moved in a proximal direction from the first position where the needle tip protrudes from the distal end opening, and a proximal end direction. A housing movably supported to a second position in which the needle tip is stored;
A biasing member installed in the housing and biasing the puncture needle in the proximal direction;
A restriction state that is installed in the housing and restricts movement of the puncture needle in the first position to the second position against the biasing force of the biasing member, and the restriction state is released. A regulating member capable of taking a release state that permits movement of the puncture needle in the first position to the second position;
The housing is movable along the longitudinal direction or circumferential direction of the housing, and is further movably installed in a direction approaching the shaft of the housing. A puncture needle assembly comprising: an operation member that moves along a direction and performs an operation of displacing the restriction member from the restricted state to the released state by the movement.

前記規制部材は、前記操作部材の移動に連動して、前記ハウジングの軸回りに回転し、その回転角度に応じて前記規制状態と前記解除状態とを取り得る請求項１に記載の穿刺針組立体。 The puncture needle assembly according to claim 1, wherein the restricting member rotates about the axis of the housing in conjunction with the movement of the operation member, and can take the restricted state and the released state according to a rotation angle thereof. Solid.

前記規制部材は、筒状をなすものであり、
前記操作部材は、前記規制部材の外周部に対向して配置されており、
前記規制部材の外周部と前記操作部材の前記規制部材の外周部に対向する部分のうちの一方には、カム溝が形成され、他方には、前記カム溝に挿入され、該カム溝内を移動する突部が突出形成され、前記突部が前記カム溝内を移動することにより、前記規制部材が前記ハウジングの軸回りに回転する請求項２に記載の穿刺針組立体。 The restricting member has a cylindrical shape,
The operation member is disposed to face the outer peripheral portion of the restriction member,
A cam groove is formed in one of the outer peripheral portion of the restricting member and the portion of the operating member facing the outer peripheral portion of the restricting member, and the other is inserted into the cam groove and is inserted into the cam groove. The puncture needle assembly according to claim 2, wherein a projecting portion that moves is formed to project, and the restricting member rotates about an axis of the housing when the projecting portion moves in the cam groove.

前記操作部材は、前記規制部材に対し接近・離間可能に支持されており、前記規制部材から離間した状態では前記突部が前記カム溝内を移動できず、前記規制部材に対し接近した状態では前記突部が前記カム溝内を移動できる請求項３に記載の穿刺針組立体。 The operation member is supported so as to be able to approach and separate from the restriction member. When the operation member is separated from the restriction member, the protrusion cannot move in the cam groove, and in a state of being close to the restriction member. The puncture needle assembly according to claim 3, wherein the protrusion is movable in the cam groove.

前記ハブは、筒状をなし、その外周部に外径が拡径した拡径部を有し、
前記規制部材は、筒状をなし、その内周部に内径が縮径した縮径部を有し、
前記規制状態では、前記拡径部が前記縮径部に当接して、前記穿刺針の移動が規制され、前記解除状態では、前記拡径部が前記縮径部から外れて、前記穿刺針の移動が可能となる請求項１ないし４のいずれかに記載の穿刺針組立体。 The hub has a cylindrical shape and has an enlarged diameter portion whose outer diameter is enlarged on the outer periphery thereof,
The regulating member has a cylindrical shape, and has a reduced diameter portion whose inner diameter is reduced on the inner peripheral portion thereof.
In the restricted state, the enlarged diameter portion abuts on the reduced diameter portion to restrict movement of the puncture needle, and in the released state, the enlarged diameter portion is disengaged from the reduced diameter portion, and The puncture needle assembly according to any one of claims 1 to 4, which is movable.