JP4211858B2

JP4211858B2 - Indwelling needle with wings

Info

Publication number: JP4211858B2
Application number: JP2007099771A
Authority: JP
Inventors: 徳寛比恵島; 行範榎原
Original assignee: Nipro Corp
Current assignee: Nipro Corp
Priority date: 2006-06-30
Filing date: 2007-04-05
Publication date: 2009-01-21
Anticipated expiration: 2027-04-05
Also published as: TWI449548B; TW200817058A; JP2008029812A

Description

本発明は、動脈等に穿刺されて、透析等に使用される翼付留置針に関する。 The present invention relates to a winged indwelling needle that is punctured into an artery or the like and used for dialysis or the like.

動脈に穿刺されて、透析等に使用される翼付留置針では、従来、使用後に、そのカヌラに筒状プロテクタを外嵌していた。しかし、上記の方法では、プロテクタの外嵌時に、医療従事者における、プロテクタを保持する指をカヌラにより穿刺する、所謂、誤穿刺事故が発生して、医療従事者がエイズや肝炎などに感染する惧れがあった。 In a winged indwelling needle punctured into an artery and used for dialysis or the like, conventionally, a tubular protector has been externally fitted to the cannula after use. However, in the above method, when a protector is fitted, a so-called false puncture accident occurs in which a medical worker punctures a finger holding the protector with a cannula, and the medical worker is infected with AIDS or hepatitis. There was a concern.

この問題を解決する翼付留置針として、下記のものが提案されている（例えば、特許文献１参照）。この留置針は、「カヌラと、カヌラの後部が前部に挿着された筒状のハブを有する可動ユニット」と、「ハブの後部に接続されて、カヌラと連通するチューブ」と、「保護筒を有するホルダー」と、「保護筒に備えられて、可撓性を有し、患者の手や腕等に貼付けられる固定用翼」を有している。チューブはハブに保護筒の外部で接続され、又、カヌラ、ハブ及びホルダーは硬質材料により形成されている。 The following is proposed as an indwelling needle with a wing that solves this problem (see, for example, Patent Document 1). This indwelling needle consists of a “canula and a movable unit having a cylindrical hub with the rear part of the cannula inserted in the front part”, “a tube connected to the rear part of the hub and communicating with the cannula”, and “protection unit” A holder having a cylinder, and a “fixing wing that is provided on the protective cylinder and has flexibility and is attached to a patient's hand or arm”. The tube is connected to the hub outside the protective cylinder, and the cannula, the hub and the holder are made of a hard material.

そして、ハブがホルダーに軸心方向に摺動可能に備えられて、可動ユニットが、ハブの前端部及びカヌラが保護筒から前方に突出する使用位置と、使用位置よりも後方位置とされ且つカヌラ全体を保護筒内に収納する収納位置に位置変更可能とされると共に、可動ユニットが上記各位置でホルダーに係脱自在に係合することで、可動ユニットが各位置でホルダーに固定される。 The hub is provided in the holder so as to be slidable in the axial direction, and the movable unit has a use position in which the front end of the hub and the cannula project forward from the protective cylinder, and a position behind the use position and the cannula. The position can be changed to the storage position where the entirety is stored in the protective cylinder, and the movable unit is detachably engaged with the holder at each position described above, so that the movable unit is fixed to the holder at each position.

上記従来においては、可動ユニットが収納位置に位置した際に、カヌラ全体を保護筒部内に収納していたため、保護筒及びハブの軸心方向長さを長くする必要があった。その結果、可動ユニットを使用位置に位置させた際に、ハブとチューブの接続部分から固定用翼までの軸心方向の距離が大となっていた。 In the prior art, when the movable unit is located at the storage position, the entire cannula is stored in the protective cylinder, so that the axial lengths of the protective cylinder and the hub need to be increased. As a result, when the movable unit is positioned at the use position, the axial distance from the connecting portion of the hub and the tube to the fixing wing is large.

ところで、可動ユニットが使用位置に固定された留置針を患者にセットした際には、固定用翼が患者に貼付けられて、留置針が患者に固定されるが、チューブが何らかの原因（例えば、患者が動いたり、或いは、チューブに何かが接触する等の原因）により上方に動いた場合には、固定用翼を支点として、留置針の後部が上方に揺動し、留置針の前部が下方に揺動しようとする。 By the way, when the indwelling needle with the movable unit fixed at the use position is set in the patient, the fixing wing is attached to the patient and the indwelling needle is fixed to the patient. , Or if the tube moves upward due to contact with the tube), the rear part of the indwelling needle swings upward with the fixing wing as a fulcrum. Try to swing downward.

ところが、従来においては、上記のように、ハブとチューブの接続部分から固定用翼までの軸心方向の距離が大であったため、固定用翼による留置針の固定力に比較して、可動ユニットの揺動させようとする外力が大となり、その結果、カヌラの刃先が下方に大きく揺動して、動脈等を損傷する惧れがあった。 However, in the prior art, as described above, since the axial distance from the connecting portion of the hub and the tube to the fixing wing is large, the movable unit is compared with the fixing force of the indwelling needle by the fixing wing. As a result, the external force to be swung is increased, and as a result, the blade edge of the cannula may be swung downward to damage an artery or the like.

特開平１０−８５３３３号公報JP 10-85333 A

本発明は、カヌラによる誤穿刺事故を防止できると共に、使用時に、ハブに接続されたチューブが上方に動いても、カヌラの刃先が下方に大きく揺動して、血管等が損傷される惧れの少ない翼付留置針を提供することを目的とする。 The present invention can prevent accidental puncture accidents caused by cannula, and even when the tube connected to the hub moves upward during use, the blade edge of the cannula may greatly swing downward and damage blood vessels and the like. An object of the present invention is to provide a winged indwelling needle with a small amount of wing.

上記目的を達成するために、本発明の特徴とするところは、Ａ．カヌラと、カヌラの後部が前部に挿着された筒状のハブを有する可動ユニットと、Ｂ．ハブの後部に接続されて、カヌラと連通するチューブと、Ｃ．ホルダーと、Ｄ．可撓性を有する固定用翼を有し、可動ユニットがホルダーに軸心方向に摺動可能に備えられて、使用位置と、使用位置よりも後方の収納位置に位置変更可能とされると共に、可動ユニットが使用位置に位置した際に、可動ユニットがホルダーに係脱自在に係合して、可動ユニットがホルダーに固定される翼付留置針において、ホルダーが、イ．ホルダーの前部に位置し、可動ユニットが使用位置に位置した際に、カヌラが前端よりも前方に突出し、可動ユニットが収納位置に位置した際に、カヌラの刃先を含む前部のみを内部に収納すると共に、固定用翼が備えられる保護筒と、ロ．上方及び下方に面状を呈する板状とされ、ホルダーの後部に位置して、可動ユニットの摺動をガイドすると共に、可動ユニットが収納位置に位置した際に、可動ユニットと係合して、可動ユニットを固定するガイド部材を有し、可動ユニットが使用位置に位置した際に、チューブがガイド部材の上方に位置して、ガイド部材がチューブの上方への移動を許容し、ガイド部材の下面に、軸心方向の圧縮力が作用した際にガイド部材を上方に湾曲突状に撓ませるための凹設部が形成された点にある。
尚、可動ユニットが、ハブに固着される可動ユニット操作用の操作体を有し、操作体が、Ａ．揺動可能とされて、可動ユニットが使用位置に位置した際に、揺動によりホルダーに係脱自在に係合する揺動アームと、Ｂ．ガイド部材に対して軸心方向に摺動可能なスライダーを有し、ガイド部材後部に、・スライダーと係合して、可動ユニットを収納位置に固定する係合手段が備えられることもある。
又、ホルダーが、Ａ．保護筒の後端部とガイド部材の前端部に連結され、揺動アームと係脱自在に係合する略リング状のロック部と、Ｂ．ロック部から後方に延設され、可動ユニットが収納位置に位置した際に、カヌラの軸心方向中途部を覆被するカバーを有することもある。
更に、Ａ．カヌラと、カヌラの後部が前部に挿着された筒状のハブを有する可動ユニットと、Ｂ．ハブの後部に接続されて、カヌラと連通するチューブと、Ｃ．ホルダーと、Ｄ．可撓性を有する固定用翼を有し、可動ユニットがホルダーに軸心方向に摺動可能に備えられて、使用位置と、使用位置よりも後方の収納位置に位置変更可能とされると共に、可動ユニットが使用位置に位置した際に、可動ユニットがホルダーに係脱自在に係合して、可動ユニットがホルダーに固定される翼付留置針において、ホルダーが、イ．ホルダーの前部に位置し、可動ユニットが使用位置に位置した際に、カヌラが前端よりも前方に突出し、可動ユニットが収納位置に位置した際に、カヌラの刃先を含む前部のみを内部に収納すると共に、固定用翼が備えられる保護筒と、ロ．ホルダーの後部に位置して、可動ユニットの摺動をガイドすると共に、可動ユニットが収納位置に位置した際に、可動ユニットと係合して、可動ユニットを固定するガイド部材を有し、可動ユニットが、Ａ．ハブに固着される可動ユニット操作用の操作体と、Ｂ．ハブ及びガイド部材に軸心方向に摺動可能に備えられ、可動ユニットの収納位置への移動時に、ハブ及びガイド部材に離脱不能に係合して、可動ユニットを収納位置に固定する固定体を有し、操作体が、・揺動可能とされて、可動ユニットが使用位置に位置した際に、揺動によりホルダーに係脱自在に係合する揺動アームを有することもある。
尚、ガイド部材が上方及び下方に面状を呈する板状とされ、可動ユニットが使用位置に位置した際に、チューブがガイド部材の上方に位置して、ガイド部材がチューブの上方への移動を許容することもある。
又、ガイド部材の下面に、軸心方向の圧縮力が作用した際にガイド部材を上方に湾曲突状に撓ませるための凹設部が形成されることもある。
又、固定体が中空状とされて、その内部にハブ及びガイド部材が挿通されると共に、固定体内部に、係合突起と係合凹部が形成され、ハブに、係合突起が離脱不能に係合可能な係合溝部が形成され、ガイド部材の後部に、係合凹部と離脱不能に係合可能な係合爪が形成されることもある。 In order to achieve the above object, the present invention is characterized by A. A movable unit having a cannula and a cylindrical hub with a rear part of the cannula inserted into the front; A tube connected to the rear of the hub and in communication with the canula; A holder; It has a fixed wing having flexibility, and the movable unit is provided in the holder so as to be slidable in the axial direction, so that the position can be changed to a use position and a storage position behind the use position. In the indwelling needle with wings, in which the movable unit is detachably engaged with the holder when the movable unit is in the use position, and the movable unit is fixed to the holder, the holder is When the movable unit is located at the front of the holder and the movable unit is in the use position, the cannula protrudes forward from the front end, and when the movable unit is located at the retracted position, only the front part including the blade of the cannula is inside. A protective cylinder which is housed and provided with fixing wings; It is a plate shape having a surface shape above and below, and is located at the rear of the holder to guide the sliding of the movable unit, and when the movable unit is located at the storage position, it engages with the movable unit, have a guide member for fixing the movable unit, when the movable unit is positioned at the use position, the tube is positioned above the guide member, the guide member allows the upward movement of the tube, the lower surface of the guide member In addition, when a compressive force in the axial direction is applied, a recessed portion for bending the guide member upward in a curved projection is formed .
Incidentally, the variable movement unit has an operating member for the movable unit operation which is fixed to the hub, the operating body is, A. A swinging arm that is swingable and is detachably engaged with the holder by swinging when the movable unit is in the use position; There may be provided a slider having a slider slidable in the axial direction with respect to the guide member, and engaging means for engaging the slider and fixing the movable unit at the storage position at the rear of the guide member.
Also, the holder is A substantially ring-shaped lock portion connected to the rear end portion of the protective cylinder and the front end portion of the guide member and detachably engaged with the swing arm; There may be a cover that extends rearward from the lock portion and covers the midway portion in the axial direction of the cannula when the movable unit is located at the storage position.
Furthermore, A. A movable unit having a cannula and a cylindrical hub with a rear part of the cannula inserted into the front; A tube connected to the rear of the hub and in communication with the canula; A holder; It has a fixed wing having flexibility, and the movable unit is provided in the holder so as to be slidable in the axial direction, so that the position can be changed to a use position and a storage position behind the use position. In the indwelling needle with wings, in which the movable unit is detachably engaged with the holder when the movable unit is in the use position, and the movable unit is fixed to the holder, the holder is When the movable unit is located at the front of the holder and the movable unit is in the use position, the cannula protrudes forward from the front end, and when the movable unit is located at the retracted position, only the front part including the blade of the cannula is inside. A protective cylinder which is housed and provided with fixing wings; Located at the rear of the holder, the movable unit guides the sliding of the movable unit, and has a guide member that engages the movable unit and fixes the movable unit when the movable unit is located at the storage position. A. An operation body for operating the movable unit fixed to the hub; A hub and a guide member are provided so as to be slidable in the axial direction, and when the movable unit is moved to the storage position, a fixed body that engages the hub and the guide member in a non-detachable manner and fixes the movable unit to the storage position. The operating body may have a swing arm that is swingable and engages the holder detachably by swinging when the movable unit is in the use position.
The guide member has a plate-like shape that is upward and downward, and when the movable unit is in the use position, the tube is positioned above the guide member, and the guide member moves upward of the tube. Sometimes it is acceptable.
In addition, a concave portion may be formed on the lower surface of the guide member so as to bend the guide member upward in a curved projection when a compressive force in the axial direction is applied.
Also, the fixed body is hollow, and the hub and guide member are inserted through it, and the engaging protrusion and the engaging recess are formed inside the fixed body, so that the engaging protrusion cannot be detached from the hub. An engaging groove portion that can be engaged is formed, and an engaging claw that can be engaged with the engaging recess portion so as not to be detached may be formed at the rear portion of the guide member.

本発明によれば、カヌラによる誤穿刺事故を防止できると共に、使用時に、ハブに接続されたチューブが上方に動いても、カヌラの刃先が下方に大きく揺動して、患者の血管等が損傷される惧れが少ない。又、ガイド部材に軸心方向の圧縮力が作用した際に、ガイド部材が上方に湾曲突状に撓んで、カヌラの刃先が下方斜め前方を指向するので、カヌラが医療従事者を誤穿刺する惧れが少ない。
請求項３記載の発明によれば、カバーがカヌラの軸心方向中途部を覆被するので、例え、カヌラの軸心方向中途部に患者の血液等が付着していても、この血液等が医療従事者に付着することを防止できる。
請求項４記載の発明によれば、カヌラによる誤穿刺事故を防止できると共に、使用時に、ハブに接続されたチューブが上方に動いても、カヌラの刃先が下方に大きく揺動して、患者の血管等が損傷される惧れが少ない。又、ガイド部材の長さを短くでき、これにより、使用時に、ガイド部材に医療従事者や患者が接触する惧れを少なくできて、留置針が動く惧れを少なくでき、カヌラにより患者の血管等を不慮に傷付けたりする惧れを少なくできる。
請求項６記載の発明によれば、ガイド部材に軸心方向の圧縮力が作用した際に、ガイド部材が上方に湾曲突状に撓んで、カヌラの刃先が下方斜め前方を指向するので、カヌラが医療従事者を誤穿刺する惧れが少ない。 According to the present invention, an accidental puncture accident caused by a cannula can be prevented, and even when the tube connected to the hub moves upward during use, the blade of the cannula swings greatly downward, damaging the patient's blood vessel and the like. There is little fear. Further, when an axial compressive force is applied to the guide member, the guide member bends upward in a curved projection, and the blade edge of the cannula is directed obliquely forward downward, so that the cannula erroneously punctures a medical worker. There is little concern.
According to the invention described in claim 3 , since the cover covers the midway portion of the cannula in the axial direction, even if the blood of the patient adheres to the midway direction of the cannula, It can be prevented from adhering to medical personnel.
According to the fourth aspect of the present invention, an accidental puncture accident caused by a cannula can be prevented, and even when the tube connected to the hub moves upward during use, the blade tip of the cannula greatly swings downward, so that the patient's There is little risk of damage to blood vessels. In addition, the length of the guide member can be shortened, thereby reducing the possibility that a medical worker or a patient will come into contact with the guide member during use, and reducing the possibility that the indwelling needle will move. It is possible to reduce the risk of inadvertently damaging the etc.
According to the sixth aspect of the present invention, when the axial compressive force acts on the guide member, the guide member bends upward in a curved protruding shape, and the blade edge of the cannula is directed obliquely downward and forward. Are less likely to accidentally puncture healthcare workers.

〔実施の形態の第１例〕
以下、本発明の実施の形態の第１例を図１〜図１４の図面に基づき説明すると、翼付留置針は、可動ユニット１と、チューブ２と、ホルダー３と、固定用翼４を有する。 [First Example of Embodiment]
Hereinafter, a first example of an embodiment of the present invention will be described with reference to the drawings of FIGS. 1 to 14. The winged indwelling needle has a movable unit 1, a tube 2, a holder 3, and a fixing wing 4. .

可動ユニット１はホルダー３に軸心方向に摺動（移動）可能に備えられるもので、カヌラ６と、ハブ７と、操作体８を有する。 The movable unit 1 is provided in the holder 3 so as to be slidable (movable) in the axial direction, and includes a cannula 6, a hub 7, and an operating body 8.

カヌラ６は細長いチューブ状とされて、前端部が先鋭状の刃先６Ａとされている。カヌラ６は、例えば、ステンレス（ＳＵＳ３０４が好ましい。）等の弾性を有する硬質材料により一体形成されている。 The cannula 6 is formed in an elongated tube shape, and the front end portion is a sharp blade edge 6A. The cannula 6 is integrally formed of a hard material having elasticity such as stainless steel (SUS304 is preferable).

ハブ７は軸心方向両側に開口する円筒状とされて、その前部にカヌラ６の後部が挿着されている。ハブ７の軸心方向中途部は、他の部分より大径の大径部１１とされている。ハブ７は、弾性を有する硬質材料、例えば、塩化ビニル、ＡＢＳ樹脂、ポリカーボネート、ポリプロピレン、ポリエステル、ポリエチレン等の熱可塑性樹脂により一体形成されている。 The hub 7 has a cylindrical shape that opens on both sides in the axial direction, and a rear portion of the cannula 6 is inserted into the front portion thereof. A midway portion in the axial direction of the hub 7 is a large-diameter portion 11 having a larger diameter than other portions. The hub 7 is integrally formed of a hard material having elasticity, for example, a thermoplastic resin such as vinyl chloride, ABS resin, polycarbonate, polypropylene, polyester, or polyethylene.

操作体８は可動ユニット１を操作するためのもので、嵌合部１３と、後方突設部１４と、スライダー（摺動体、移動体）１５と、左右一対の揺動アーム１６を有し、ハブ７と同様の弾性を有する硬質材料により一体形成されている。尚、別個に形成された後、組立られることもある。嵌合部１３は下側が切り欠かかれたリング状とされて、ハブ７の後部にその後方から外嵌されて、ハブ７の大径部１１と軸心方向に関して当接している。後方突設部１４は嵌合部１３の左右両側部から後方に延設されている。後方突設部１４は下方に開口すると共に、両側部に窓部を有する。スライダー１５は後方突設部１４の左右両側部の下端部を連結するもので、その後端部に、係合突起５１が上方に突設され、係合突起５１の後面が、前傾状の傾斜面５２とされている。各揺動アーム１６は後方突設部１４の後端部から外側方及び前方に突設されている。各揺動アーム１６は弾性変形を介して幅方向に揺動可能とされて、その前部には、内側方に凹設された係合受部２０と、前面が前方に向かうに従って内側方に移行する傾斜面２１とされた突部２２が前方に向かって連設されている。 The operating body 8 is for operating the movable unit 1, and has a fitting portion 13, a rear projecting portion 14, a slider (sliding body, moving body) 15, and a pair of left and right swing arms 16. It is integrally formed of a hard material having elasticity similar to that of the hub 7. In addition, after forming separately, it may assemble. The fitting portion 13 has a ring shape with a lower side cut out, and is fitted on the rear portion of the hub 7 from the rear side, and is in contact with the large diameter portion 11 of the hub 7 in the axial direction. The rear protruding portion 14 extends rearward from the left and right side portions of the fitting portion 13. The rear projecting portion 14 opens downward and has windows on both sides. The slider 15 connects the lower end portions of the left and right side portions of the rear projecting portion 14. An engagement projection 51 is projected upward at the rear end portion, and the rear surface of the engagement projection 51 is inclined forward. The surface 52 is used. Each swing arm 16 projects outward and forward from the rear end of the rear projecting portion 14. Each swing arm 16 is swingable in the width direction through elastic deformation, and at its front part, an engagement receiving part 20 recessed inwardly and inwardly as the front face goes forward. A projecting portion 22 which is an inclined surface 21 to be transferred is continuously provided toward the front.

チューブ２はハブ７の後部に外嵌され、接着剤等によりハブ７と接続され、カヌラ６とハブ７を介して連通している。このとき、チューブ２の接続側端部はハブ７の大径部１１との間に前記操作体８の嵌合部１３の少なくとも一部を狭持し、操作体８がハブ７から脱落することを防止している。チューブ２は好ましくは半透明で柔軟性を備えた材料から成形されるものであり、例えばハブ７と同様の材料により一体形成される。 The tube 2 is fitted on the rear portion of the hub 7, connected to the hub 7 with an adhesive or the like, and communicates with the canula 6 via the hub 7. At this time, at least a part of the fitting portion 13 of the operation body 8 is sandwiched between the connection side end portion of the tube 2 and the large diameter portion 11 of the hub 7, and the operation body 8 falls off the hub 7. Is preventing. The tube 2 is preferably formed from a translucent and flexible material, and is integrally formed of the same material as the hub 7, for example.

ホルダー３には可動ユニット１が軸心方向に移動可能に備えられて、図１〜図７に示す使用位置と、図８〜図１４に示すように、使用位置よりも後方の収納位置に位置変更可能とされる。ホルダー３は、ロック部２５と、保護筒２６と、ガイド部材２７と、カバー２８を有し、ハブ７と同様の硬質材料により一体形成されている。 The movable unit 1 is provided in the holder 3 so as to be movable in the axial direction, and is located at a use position shown in FIGS. 1 to 7 and a storage position behind the use position as shown in FIGS. It can be changed. The holder 3 has a lock portion 25, a protective cylinder 26, a guide member 27, and a cover 28, and is integrally formed of the same hard material as that of the hub 7.

ロック部２５は（略）リング状とされ、その軸心方向中途部の内面が前端部よりも大径の大径部３０とされて、内面における、大径部３０と前端部の境界部には、後方に面状を呈する段付面３１が形成されており、可動ユニット１が使用位置に位置した際には、ハブ７の大径部１１が上記大径部３０内に嵌入して、段付面３１と軸心方向に関して当接する。ロック部２５からは、上方に湾曲突状とされたカバー２８が後方に突設されており、可動ユニット１を収納位置に位置させた際に、カヌラ６の軸心方向中途部を覆被する。又、その左右両側には係合部３２が上下方向に配設されると共に、係合部３２の前方側には、揺動アーム１６の突部２２が挿脱自在に挿入されて可動ユニット１が使用位置に固定される挿脱口５４が幅方向に貫通形成されている。 The lock portion 25 has a (substantially) ring shape, and the inner surface of the midway portion in the axial center is the large diameter portion 30 having a larger diameter than the front end portion, and the boundary portion between the large diameter portion 30 and the front end portion on the inner surface. Is formed with a stepped surface 31 having a planar shape at the rear, and when the movable unit 1 is located at the use position, the large-diameter portion 11 of the hub 7 is fitted into the large-diameter portion 30, It abuts on the stepped surface 31 with respect to the axial direction. From the lock portion 25, a cover 28 that is curved upward is projected rearward, and covers the midway in the axial direction of the cannula 6 when the movable unit 1 is positioned at the storage position. . Engaging portions 32 are arranged in the vertical direction on both the left and right sides, and the protrusion 22 of the swing arm 16 is removably inserted on the front side of the engaging portion 32 to move the movable unit 1. Is inserted and removed in the width direction.

保護筒２６はロック部２５の前端部から前方に突設されており、可動ユニット１が使用位置に位置した際には、保護筒２６の内部にハブ７の前部が軸心方向に摺動（移動）可能に挿入されて、ハブ７の前端部及びカヌラ６が保護筒２６よりも前方に突出する。又、可動ユニット１が収納位置に位置した際には、保護筒２６内部にカヌラ６の刃先６Ａを含む前部のみを収納するようにしている。これにより、保護筒２６及びハブ７の軸心方向の長さを短くして、可動ユニット１を使用位置に位置させた際における、ハブ７とチューブ２の接続部分から固定用翼４までの軸心方向に関する距離を小としている。 The protective cylinder 26 protrudes forward from the front end of the lock portion 25. When the movable unit 1 is located at the use position, the front portion of the hub 7 slides in the axial direction inside the protective cylinder 26. (Moving) It is inserted so that the front end portion of the hub 7 and the cannula 6 protrude forward from the protective cylinder 26. When the movable unit 1 is located at the storage position, only the front portion including the blade edge 6A of the cannula 6 is stored inside the protective cylinder 26. Thus, the shaft from the connecting portion of the hub 7 and the tube 2 to the fixing blade 4 when the movable unit 1 is positioned at the use position by shortening the length of the protective cylinder 26 and the hub 7 in the axial direction. The distance in the direction of the heart is small.

ガイド部材２７は可動ユニット１を軸心方向にガイドするもので、軸心方向に細長い板状とされて、上方及び下方に面状を呈している。ガイド部材２７の下方にスライダー１５が軸心方向に摺動可能に配置されて、ガイド部材２７の下面には、スライダー１５の係合突起５１が内部を摺動するガイド溝部２７Ａが上方に凹設されている。又、ガイド部材２７の後端部にコ型状の切り込みが形成されることで、上下方向に揺動可能とされ且つ係合手段とされる係合片５５が配置されている。係合片５５の後部の下面には、可動ユニット１が収納位置に到達した際に係合突起５１が離脱不能に係合する係合凹部５６が上方に凹設され、係合片５５の前部の下面、即ち、下面における、係合凹部５６の前側部分は、前上がりの傾斜面５７とされている。ガイド部材２７はロック部２５の後部の下端部から後方に突設されている。ガイド部材２７の前部には、下面側から凹設された凹設部（ヒンジ、切欠部）２７Ｂが形成されている。これにより、ガイド部材２７に軸心方向の圧縮力が作用した際に、ガイド部材２７が上方に湾曲突状に撓むようにされている。尚、凹設部２７Ｂの内部の後面は前上がりの傾斜状とされている。
The guide member 27 guides the movable unit 1 in the axial direction. The guide member 27 is formed in a plate shape elongated in the axial direction, and has a planar shape upward and downward . The slider 15 is disposed below the guide member 27 so as to be slidable in the axial direction. On the lower surface of the guide member 27, a guide groove portion 27A in which the engaging projection 51 of the slider 15 slides is recessed upward. Has been. Further, by forming a U-shaped cut at the rear end portion of the guide member 27, an engagement piece 55 which is swingable in the vertical direction and is used as an engagement means is disposed. On the lower surface of the rear portion of the engagement piece 55, an engagement recess 56 is formed so as to be engaged with the engagement protrusion 51 so that the engagement protrusion 51 cannot be detached when the movable unit 1 reaches the storage position. The lower surface of the part, that is, the front side portion of the engaging recess 56 on the lower surface is an inclined surface 57 that rises forward. The guide member 27 protrudes rearward from the lower end portion of the rear portion of the lock portion 25. In the front portion of the guide member 27, a recessed portion (hinge, notch portion) 27B that is recessed from the lower surface side is formed. As a result, when a compressive force in the axial direction acts on the guide member 27, the guide member 27 is bent upward in a curved projection. In addition, the rear surface inside the recessed portion 27B is inclined upward.

固定用翼４は保護筒２６に一体形成されており、保護筒２６から外側方に延設された左右一対の翼部４１を有する。固定用翼４はハブ７と同様の材料により一体形成されているが、柔軟性及び弾性を有する。翼部４１は患者の腕又は手等に貼付けられる。 The fixing wing 4 is integrally formed with the protective cylinder 26 and has a pair of left and right wing portions 41 extending outward from the protective cylinder 26. The fixing wing 4 is integrally formed of the same material as the hub 7 but has flexibility and elasticity. The wing part 41 is attached to the patient's arm or hand.

上記構成例によれば、翼付留置針の使用時には、図１〜図７に示すように、可動ユニット１は使用位置にあって、ハブ７の前端部及びカヌラ６が保護筒２６から前方に突出している。又、ホルダー３のロック部２５の係合部３２に可動ユニット１の操作体８の突部２２が係合して、可動ユニット１は使用位置に固定されている。 According to the above configuration example, when the winged indwelling needle is used, as shown in FIGS. 1 to 7, the movable unit 1 is in the use position, and the front end portion of the hub 7 and the cannula 6 are moved forward from the protective cylinder 26. It protrudes. Further, the protrusion 22 of the operating body 8 of the movable unit 1 is engaged with the engaging portion 32 of the lock portion 25 of the holder 3 so that the movable unit 1 is fixed at the use position.

翼付留置針を患者の手又は腕等にセットする際には、カヌラ６を患者の手又は腕等の動脈等に穿刺すると共に、固定用翼４を患者の手又は腕等に貼付けて、翼付留置針を患者に固定する。 When setting the winged indwelling needle on the patient's hand or arm, etc., the cannula 6 is punctured into an artery such as the patient's hand or arm, and the fixing wing 4 is attached to the patient's hand or arm, Secure the winged indwelling needle to the patient.

どころで、チューブ２が何らかの原因で上方または左右に動いた際、チューブ２の動きは可動ユニットｌに伝わり、例えば可動ユニット１の後部が上部へ揺動すると、可動ユニット１の前部、すなわちカヌラ６が下方に揺動する。この揺動は患者に固定される固定用翼４が支点となって生じるため、固定用翼４からチューブ２の動きが阻害されない部分までの距離が大きくなるほど、カヌラ６に伝わる揺動は大きくなる。従来の翼付留置針は、カヌラを収納するホルダーの全長が長く、またチューブはホルダーの全長に略等しいハブの末端に接続されていたため、固定用翼からチューブの動きが阻害されない部分、すなわちチューブとハブとの接続部分までの軸心方向距離は大きかった。 On the other hand, when the tube 2 moves upward or left and right for some reason, the movement of the tube 2 is transmitted to the movable unit l. For example, when the rear part of the movable unit 1 swings upward, the front part of the movable unit 1, that is, the cannula 6 swings downward. Since this swaying occurs with the fixing wing 4 fixed to the patient as a fulcrum, the swaying transmitted to the cannula 6 increases as the distance from the fixing wing 4 to the portion where the movement of the tube 2 is not hindered increases. . The conventional winged indwelling needle has a long holder for accommodating the cannula, and the tube is connected to the end of the hub that is substantially equal to the entire length of the holder. The distance in the axial direction to the connection between the hub and the hub was large.

しかし、本発明の翼付留置針はホルダー３の後方はガイド部材２７で構成されているため、チューブ２が上方および左右方向に露出しており、ハブ７もホルダー３の前方に設けられる保護筒２６、ロック部２５およびカバー２８の全長に略等しい長さとなっている。したがって、固定用翼４からチューブ２とハブ７との接続部分までの軸心方向距離は格段に短くなり、チューブの動きによるカヌラ６の揺動も小さくでき、カヌラ６の刃先６Ａが動脈等を損傷するおそれを少なくすることができる。 However, since the winged indwelling needle of the present invention is configured by the guide member 27 at the rear of the holder 3, the tube 2 is exposed upward and in the left-right direction, and the hub 7 is also a protective cylinder provided in front of the holder 3. 26, the length of the lock portion 25 and the cover 28 is substantially equal to the entire length. Therefore, the axial distance from the fixing wing 4 to the connecting portion between the tube 2 and the hub 7 is remarkably shortened, and the swing of the cannula 6 due to the movement of the tube can be reduced. The risk of damage can be reduced.

留置針を患者から取り外す際には、まず、可動ユニット１の操作体８の揺動アーム１６を内側方に揺動させて、ホルダー３のロック部２５の係合部３２から揺動アーム１６の突部２２を離脱させた後、可動ユニット１を後方に摺動させて、保護筒２６にカヌラ６の刃先６Ａを含む前部のみを収納させる。これにより、医療従事者の指等をカヌラ６により穿刺する、所謂、誤穿刺事故を防止でき、医療従事者がエイズや肝炎などに感染する惧れをなくすことができる。 When removing the indwelling needle from the patient, first, the swing arm 16 of the operating body 8 of the movable unit 1 is swung inward, and the swing arm 16 is moved from the engagement portion 32 of the lock portion 25 of the holder 3. After the protrusion 22 is detached, the movable unit 1 is slid rearward so that only the front portion including the cutting edge 6A of the cannula 6 is stored in the protective cylinder 26. Thereby, a so-called erroneous puncture accident in which a medical worker's finger or the like is punctured with the canula 6 can be prevented, and the possibility that the medical worker is infected with AIDS or hepatitis can be eliminated.

又、上記の際には、上側のカバー２８がカヌラ６の軸心方向中途部を覆被するので、例え、カヌラ６の軸心方向中途部に患者の血液等が付着していても、この血液等が医療従事者に付着することを防止できる。 In the above case, since the upper cover 28 covers the midway portion of the cannula 6 in the axial direction, even if patient blood or the like adheres to the midway portion of the cannula 6 in the axial direction, Blood or the like can be prevented from adhering to medical staff.

又、可動ユニット１の上記摺動時に、スライダー１５がガイド部材２７の後部に到達すると、スライダー１５の係合突起５１の傾斜面５２がガイド部材２７の係合片５５の傾斜面５７と当接して、係合片５５を上方に揺動させ、係合突起５１が係合片５５の係合凹部５６に離脱不能に係合すると共に、係合片５５が弾性復元力により原位置に復帰して、可動ユニット１は収納位置に固定される。 Further, when the slider 15 reaches the rear portion of the guide member 27 during the sliding of the movable unit 1, the inclined surface 52 of the engaging protrusion 51 of the slider 15 comes into contact with the inclined surface 57 of the engaging piece 55 of the guide member 27. Thus, the engaging piece 55 is swung upward so that the engaging protrusion 51 is engaged with the engaging recess 56 of the engaging piece 55 so as not to be detached, and the engaging piece 55 is returned to the original position by the elastic restoring force. Thus, the movable unit 1 is fixed at the storage position.

ところで、上記の際に、保護筒２６に後方側への外力が作用し、ガイド部材２７に軸心方向の圧縮力が作用した場合において、ガイド部材２７に凹設部２７Ｂが形成されていれば、ガイド部材２７が上方に湾曲突状に撓むため、カヌラ６の刃先６Ａが下方斜め前方を指向することとなり、医療従事者を穿刺する惧れが少ない。 By the way, in the above case, when a backward external force acts on the protective cylinder 26 and an axial compressive force acts on the guide member 27, the recessed portion 27B is formed on the guide member 27. Since the guide member 27 bends upward in a curved projection, the cutting edge 6A of the cannula 6 is directed obliquely forward and downward, and there is little possibility of puncturing a medical worker.

〔実施の形態の第２例〕
図１５〜図２８は本発明の実施の形態の第２例を示し、第１例の相違点を主に説明すると、可動ユニット１の操作体８では、嵌合部１３の左右両側部から、後方突設部１４が後方に突設されている。スライダー１５は、嵌合部１３の下端部から下方に突設されて、倒立Ｔ型状とされており、上部側の摺動部１８と、摺動部１８よりも幅が広くされた抜止部１９から成る。揺動アーム１６は単一とされて、両後方突設部１４の後端部から上方及び前方に突設されており、弾性変形を介して上下方向に揺動可能とされている。揺動アーム１６の前端部には、下方に凹設された係合受部２０と、上方に突出し且つ前端面が後傾状の傾斜面２１とされた突部２２が前方に向かって連設されている。又、揺動アーム１６の軸心方向中途部には、揺動アーム１６を下方に押圧操作するための操作部２３が立設されている。 [Second Example of Embodiment]
FIGS. 15-28 shows the 2nd example of embodiment of this invention, and when the difference of a 1st example is mainly demonstrated, in the operation body 8 of the movable unit 1, from the right-and-left both sides of the fitting part 13, FIG. A rear projecting portion 14 projects rearward. The slider 15 protrudes downward from the lower end portion of the fitting portion 13 and has an inverted T shape. The upper sliding portion 18 and a retaining portion that is wider than the sliding portion 18. Nineteen. The swing arm 16 is a single, and protrudes upward and forward from the rear ends of both rear protrusions 14, and can swing in the vertical direction through elastic deformation. At the front end portion of the swing arm 16, an engagement receiving portion 20 that is recessed downward, and a protrusion 22 that protrudes upward and has a front end surface that is an inclined surface 21 that is inclined backward, are provided continuously forward. Has been. Further, an operation portion 23 is provided in the middle of the swing arm 16 in the axial direction to push the swing arm 16 downward.

ホルダー３のロック部２５の上端部には、係合部３２が幅方向に横設されており、可動ユニット１を使用位置に位置させた際に、操作体８の揺動アーム１６における、突部２２の傾斜面２１が係合部３２と当接することで、揺動アーム１６が下方に揺動して、係合部３２が揺動アーム１６の係合受部２０に相対的に上方から係脱自在に係合し、可動ユニット１は使用位置に固定される。 At the upper end of the lock portion 25 of the holder 3, an engagement portion 32 is provided in the width direction so that when the movable unit 1 is positioned at the use position, the protrusion on the swing arm 16 of the operating body 8. When the inclined surface 21 of the portion 22 comes into contact with the engaging portion 32, the swing arm 16 swings downward, and the engagement portion 32 moves relative to the engagement receiving portion 20 of the swing arm 16 from above. The movable unit 1 is fixed in a use position by being engaged with it freely.

ガイド部材２７の幅方向中央部は両側部よりも上位とされて、浮いた状態とされている。ガイド部材２７の幅方向中央部には、上下方向に貫通形成されたガイド溝３４が軸心方向に形成され、このガイド溝３４に、操作体８のスライダー１５の摺動部１８が挿入されて、軸心方向にガイドされると共に、スライダー１５の抜止部１９により、スライダー１５がガイド溝３４から離脱することが防止される。尚、抜止部１９はガイド部材２７の下面側に収納状とされている。ガイド溝３４の軸心方向中途部には、スライダー１５の抜止部１９よりも一回り大きな挿入口３５が形成されており、スライダー１５の摺動部１８をガイド溝３４に挿入する際には、この挿入口３５にスライダー１５が上方から挿入される。ガイド溝３４の後部には、係合手段として、他の部分よりも幅広とされた幅広部３６と、他の部分と同一幅とされた係合溝部３７が後方に向かって連設され、幅広部３６の前縁部の左右両側からは、外側方に揺動可能とされた左右一対の揺動片部３８が後方に突設されている。各揺動片部３８の後部は後方に向かうに従って幅広部３６の幅方向中央部に移行する傾斜状とされて、両揺動片部３８の後端部は若干の隙間を介して対向している。そして、可動ユニット１が使用位置に位置した際には、スライダー１５がガイド溝３４の前端部に位置し、可動ユニット１が収納位置に位置した際には、スライダー１５が係合溝部３７に位置すると共に、スライダー１５の係合溝部３７からの離脱は揺動片部３８により阻止される。 The central portion of the guide member 27 in the width direction is higher than both side portions and is in a floating state. A guide groove 34 penetratingly formed in the vertical direction is formed in the axial direction in the center portion in the width direction of the guide member 27, and the sliding portion 18 of the slider 15 of the operating body 8 is inserted into the guide groove 34. In addition to being guided in the axial direction, the retaining portion 19 of the slider 15 prevents the slider 15 from being detached from the guide groove 34. Note that the retaining portion 19 is housed on the lower surface side of the guide member 27. An insertion port 35 that is slightly larger than the retaining portion 19 of the slider 15 is formed in the middle portion in the axial direction of the guide groove 34. When the sliding portion 18 of the slider 15 is inserted into the guide groove 34, The slider 15 is inserted into the insertion port 35 from above. A wide portion 36 that is wider than the other portions and an engagement groove portion 37 that has the same width as the other portions are continuously provided at the rear portion of the guide groove 34 as the engaging means, and widened. From left and right sides of the front edge of the portion 36, a pair of left and right swinging pieces 38 that are swingable outwardly project from the rear. The rear part of each swing piece 38 is inclined so as to move to the center in the width direction of the wide part 36 as it goes rearward, and the rear end parts of both swing pieces 38 face each other with a slight gap. Yes. When the movable unit 1 is positioned at the use position, the slider 15 is positioned at the front end portion of the guide groove 34, and when the movable unit 1 is positioned at the storage position, the slider 15 is positioned at the engagement groove portion 37. At the same time, the detachment of the slider 15 from the engaging groove 37 is prevented by the swing piece 38.

カバー２８はガイド部材２７の前部の左右両側部に立設されると共に、その前端部がロック部２５に連結されて、外側方に湾曲突状とされており、可動ユニット１を収納位置に位置させた際に、カヌラ６の軸心方向中途部を覆被する。 The cover 28 is erected on both the left and right sides of the front portion of the guide member 27, and the front end portion thereof is connected to the lock portion 25 so as to be curved outwardly so that the movable unit 1 is in the storage position. When positioned, the middle part of the cannula 6 in the axial direction is covered.

固定用翼４は保護筒２６とは別体とされて、幅方向中央部に位置する外嵌部４０と、外嵌部４０から外側方に延設された左右一対の翼部４１を有し、ハブ７と同様の材料により一体形成されている。外嵌部４０は保護筒２６に外嵌固着されている。尚、固定用翼４を、第１例と同様に、保護筒２６と一体形成してもよい。また、翼部４１の裏面は、患者への固定を確実にするために、図１８に示されるように複数の凹凸を有する表面が形成されたものであってもよい。 The fixing wing 4 is separated from the protective cylinder 26 and has an outer fitting portion 40 located at the center in the width direction and a pair of left and right wing portions 41 extending outward from the outer fitting portion 40. These are integrally formed of the same material as the hub 7. The outer fitting part 40 is fixed to the protective cylinder 26 by outer fitting. The fixing wing 4 may be integrally formed with the protective cylinder 26 as in the first example. Further, the rear surface of the wing portion 41 may be formed with a surface having a plurality of irregularities as shown in FIG. 18 in order to ensure fixation to the patient.

上記構成例では、可動ユニット１を、図１５〜図２１に示す使用位置から、図２２〜図２８に示す収納位置に移動させる際には、可動ユニット１の操作体８の揺動アーム１６を操作部２３により下方に押圧して、突部２２をホルダー３のロック部２５の係合部３２から離脱させた後、可動ユニット１を収納位置まで摺動させて、可動ユニット１のカヌラ６における、刃先６Ａを含む前部のみを保護筒２６及びロック部２５の内部に収納する。又、上記の際には、左右のカバー２８がカヌラ６の軸心方向中途部を覆被する。 In the above configuration example, when the movable unit 1 is moved from the use position shown in FIGS. 15 to 21 to the storage position shown in FIGS. 22 to 28, the swing arm 16 of the operating body 8 of the movable unit 1 is moved. After pressing the operating portion 23 downward to disengage the protrusion 22 from the engaging portion 32 of the lock portion 25 of the holder 3, the movable unit 1 is slid to the storage position, and the cannula 6 of the movable unit 1 is Only the front part including the cutting edge 6 </ b> A is accommodated in the protective cylinder 26 and the lock part 25. Further, in the above case, the left and right covers 28 cover the middle part of the cannula 6 in the axial direction.

更に、可動ユニット１の上記摺動時には、操作体８のスライダー１５は可動ユニット１のガイド部材２７のガイド溝３４内を移動するが、スライダー１５の抜止部１９がガイド部材２７の下面側に収納状とされているので、スライダー１５が患者の手や腕に触れることはない。 Further, when the movable unit 1 slides, the slider 15 of the operating body 8 moves in the guide groove 34 of the guide member 27 of the movable unit 1, but the retaining portion 19 of the slider 15 is stored on the lower surface side of the guide member 27. Therefore, the slider 15 does not touch the patient's hand or arm.

又、可動ユニット１の上記摺動時に、スライダー１５がガイド溝３４の後部に達すると、スライダー１５は両揺動片部３８に当接し、両揺動片部３８を弾性変形させて、外側方に揺動させながら押し開き、スライダー１５の摺動部１８がガイド溝３４の係合溝部３７内に到達する。そして、両揺動片部３８は摺動部１８が通過すると、弾性復元力により、原位置に復帰して、スライダー１５が係合溝部３７から離脱することを阻止する。これにより、可動ユニット１は収納位置に固定される。 When the slider 15 reaches the rear part of the guide groove 34 during the sliding of the movable unit 1, the slider 15 comes into contact with both the swinging piece portions 38 and elastically deforms both the swinging piece portions 38 to move outward. The sliding portion 18 of the slider 15 reaches the engaging groove portion 37 of the guide groove 34 while being swung. Then, when the sliding portion 18 passes, both the swing piece portions 38 are returned to their original positions by the elastic restoring force, and the slider 15 is prevented from being detached from the engaging groove portion 37. Thereby, the movable unit 1 is fixed to the storage position.

〔実施の形態の第３例〕
図２９〜図４５は本発明の実施の形態の第３例を示し、第１例の変形例であって、その相違点を説明すると、ハブ７の大径部１１よりも前部側が、大径部１１よりも小径とされ且つ軸心方向に一定径とされた小径部６１と、後方に向かってテーパー状とされたテーパー部６２と、外周面に係合溝部６３が全周にわたって形成された周溝部６４と、テーパー部６２の前端と同一外径とされ且つ軸心方向に一定径とされた一定径部６５から成り、上記各部が軸心方向に連設されている。 [Third example of embodiment]
29 to 45 show a third example of the embodiment of the present invention, which is a modification of the first example. The difference will be described. The front side of the hub 7 is larger than the large-diameter part 11. A small-diameter portion 61 having a smaller diameter than the diameter portion 11 and having a constant diameter in the axial direction, a tapered portion 62 tapered toward the rear, and an engaging groove 63 on the outer peripheral surface are formed over the entire circumference. The circumferential groove portion 64 and a constant diameter portion 65 having the same outer diameter as that of the front end of the tapered portion 62 and a constant diameter in the axial direction, are connected in the axial direction.

可動ユニット１は中空状の固定体６７を有する。固定体６７は上端部が切り欠かれた略リング状とされており、ハブ７と同様の弾性を有する硬質材料により一体形成されている。固定体６７はハブ７の大径部１１よりも前部側とガイド部材２７に軸心方向に摺動可能に外嵌されており、その内周面には、径方向内方に突出する係合突起６８が形成されている。可動ユニット１の使用位置では、係合突起６８がハブ７の大径部１１と軸心方向に関して当接、又は、少隙を介して対向している。固定体６７の下部には、前後方向及び下方に開口する空洞部６９が形成され、この空洞部６９内にロック部２５及びガイド部材２７が挿通されている。空洞部６９内の前部の左右両側面には、外側方に凹設された係合凹部７０が形成されると共に、空洞部６９内の後部の左右両側の内面は、前方に向かうに従って内側方に移行する傾斜面７１とされている。 The movable unit 1 has a hollow fixed body 67. The fixed body 67 has a substantially ring shape with an upper end cut out, and is integrally formed of a hard material having elasticity similar to that of the hub 7. The fixed body 67 is externally fitted to the front side of the large-diameter portion 11 of the hub 7 and the guide member 27 so as to be slidable in the axial direction, and the inner peripheral surface thereof protrudes radially inward. A mating protrusion 68 is formed. At the use position of the movable unit 1, the engagement protrusion 68 is in contact with the large diameter portion 11 of the hub 7 in the axial direction or opposed through a small gap. A hollow portion 69 that opens in the front-rear direction and downward is formed in the lower portion of the fixed body 67, and the lock portion 25 and the guide member 27 are inserted into the hollow portion 69. Engagement recesses 70 are formed on both the left and right side surfaces of the front portion in the cavity portion 69, and the inner surfaces on the left and right sides of the rear portion in the cavity portion 69 are inwardly directed toward the front side. It is set as the inclined surface 71 which transfers to.

ガイド部材２７の軸心方向長さは短くされて、その後端は、軸心方向に関して、カバー２８の後端と略同じ位置とされている。ガイド部材２７の後部は左右一対の係合爪７３とされている。係合爪７３は、弾性変形を介して、左右に揺動可能とされており、その後端部は外側方に突出する爪部７４とされている。各爪部７４は、固定体６７の後方への移動時に、固定体６７の係合凹部７０に離脱不能に係合して、固定体６７を固定する。 The length of the guide member 27 in the axial direction is shortened, and the rear end thereof is substantially the same position as the rear end of the cover 28 with respect to the axial direction. The rear portion of the guide member 27 is a pair of left and right engaging claws 73. The engaging claw 73 can swing left and right through elastic deformation, and its rear end portion is a claw portion 74 protruding outward. Each claw portion 74 engages with the engagement recess 70 of the fixed body 67 so as not to be detached when the fixed body 67 moves rearward, thereby fixing the fixed body 67.

上記構成例では、可動ユニット１を、図２９〜図３６に示す使用位置から、図３７〜図４５に示す収納位置に移動させる際には、可動ユニット１の操作体８の揺動アーム１６を内側方に揺動させて、ホルダー３のロック部２５の係合部３２から操作体８の突部２２を離脱させた後、可動ユニット１を後方に引っ張る。 In the above configuration example, when the movable unit 1 is moved from the use position shown in FIGS. 29 to 36 to the storage position shown in FIGS. 37 to 45, the swing arm 16 of the operating body 8 of the movable unit 1 is moved. The movable unit 1 is pulled backward after the projection 22 of the operating body 8 is detached from the engagement portion 32 of the lock portion 25 of the holder 3 by swinging inward.

これにより、可動ユニット１はチューブ２と共に、後方の収納位置まで移動して、保護筒２６にカヌラ６の刃先６Ａを含む前部のみが収納される。この移動時に、ハブ７の小径部６１及びテーパー部６２が固定体６７の係合突起６８と摺動する。そして、テーパー部６２が係合突起６８と摺動した際に、固定体６７が径方向外方に弾性変形し、上記摺動後、固定体６７が径方向内方に弾性復帰して、固定体６７の係合突起６８がハブ７の係合溝部６３内に離脱不能に落下係合して、ハブ７と固定体６７が固定される。 Thereby, the movable unit 1 moves to the rear storage position together with the tube 2, and only the front portion including the cutting edge 6 </ b> A of the cannula 6 is stored in the protection cylinder 26. During this movement, the small diameter portion 61 and the taper portion 62 of the hub 7 slide with the engagement protrusion 68 of the fixed body 67. And when the taper part 62 slides with the engagement protrusion 68, the fixed body 67 is elastically deformed radially outward, and after the sliding, the fixed body 67 is elastically restored radially inward and fixed. The engaging projection 68 of the body 67 is dropped and engaged in the engaging groove 63 of the hub 7 so as not to be detached, and the hub 7 and the fixed body 67 are fixed.

又、この固定後（又は、固定前に）、固定体６７の傾斜面７１がガイド部材２７の係合爪７３の爪部７４に当接して、軸心方向に摺動し、これにより、係合爪７３は弾性変形を介して内側方に揺動する。上記摺動が終了すると、係合爪７３が弾性復帰して、外側方に揺動し、その爪部７４が固定体６７の係合凹部７０内に離脱不能に係合して、固定体６７が収納位置に固定される。上記のようにして、可動ユニット１は収納位置に固定される。 Further, after this fixing (or before fixing), the inclined surface 71 of the fixed body 67 comes into contact with the claw portion 74 of the engaging claw 73 of the guide member 27 and slides in the axial direction. The pawl 73 swings inward via elastic deformation. When the sliding is completed, the engaging claw 73 is elastically restored and swings outward, and the claw portion 74 is engaged with the engaging recess 70 of the fixed body 67 so as not to be detached. Is fixed in the storage position. As described above, the movable unit 1 is fixed at the storage position.

上記第３例では、固定体６７がハブ７、ロック部２５及びガイド部材２７に軸心方向に摺動可能に備えられて、可動ユニット１の収納位置への移動時に、ハブ７及びガイド部材２７に離脱不能に係合して、可動ユニット１が収納位置に固定されるので、ガイド部材２７の長さを短くできる。これにより、使用時に、ガイド部材２７に医療従事者や患者が接触する惧れを少なくできて、留置針が動く惧れを少なくでき、カヌラ６により患者の血管等を不慮に傷付けたりする惧れを少なくできる。 In the third example, the fixed body 67 is provided on the hub 7, the lock portion 25, and the guide member 27 so as to be slidable in the axial direction, and the hub 7 and the guide member 27 are moved when the movable unit 1 is moved to the storage position. Since the movable unit 1 is fixed at the storage position by being engaged so as not to be disengaged, the length of the guide member 27 can be shortened. As a result, it is possible to reduce the possibility that the medical staff and the patient will come into contact with the guide member 27 at the time of use, and to reduce the possibility that the indwelling needle will move, and the canula 6 may injure the patient's blood vessel and the like accidentally. Can be reduced.

尚、実施の形態の第１例及び第３例では、係合部を係合凹部に相対的に外側方から係合するようにしたが、反対に相対的に内側方から係合してもよい。又、上記実施の形態の第２例では、係合部を係合凹部に上方から相対的に係合するようにしたが、反対に下方から相対的に係合するようにしてもよい。更に、第２例及び第３例では、ガイド部材に凹設部を形成していないが、形成してもよい。 In the first example and the third example of the embodiment, the engaging portion is engaged with the engaging concave portion from the outer side relatively. Good. In the second example of the above embodiment, the engaging portion is relatively engaged with the engaging recess from above, but it may be relatively engaged from below. Furthermore, in the second example and the third example, the recessed portion is not formed in the guide member, but it may be formed.

本発明の実施の形態の第１例を示す斜視図である。It is a perspective view which shows the 1st example of embodiment of this invention. 図１の側面図である。It is a side view of FIG. 図１の平面図である。It is a top view of FIG. 図１の底面図である。It is a bottom view of FIG. 図１のＡ−Ａ線矢視断面図である。It is AA arrow sectional drawing of FIG. 図１のＢ−Ｂ線矢視断面図である。It is a BB arrow directional cross-sectional view of FIG. 図５のＣ−Ｃ線矢視断面図である。It is CC sectional view taken on the line of FIG. 図１の可動ユニットが収納位置に位置した状態を示す斜視図である。It is a perspective view which shows the state which the movable unit of FIG. 1 located in the accommodation position. 図８の側面図である。It is a side view of FIG. 図８の平面図である。It is a top view of FIG. 図８の底面図である。It is a bottom view of FIG. 図１１のＤ−Ｄ線矢視断面図である。It is the DD sectional view taken on the line of FIG. 図１２のＥ−Ｅ線矢視断面図である。It is the EE arrow directional cross-sectional view of FIG. 図１２のＦ−Ｆ線矢視断面図である。FIG. 13 is a cross-sectional view taken along line F-F in FIG. 12. 本発明の実施の形態の第２例を示す斜視図である。It is a perspective view which shows the 2nd example of embodiment of this invention. 図１５の側面図である。FIG. 16 is a side view of FIG. 15. 図１５の平面図である。FIG. 16 is a plan view of FIG. 15. 図１５の底面図である。FIG. 16 is a bottom view of FIG. 15. 図１５のＧ−Ｇ線矢視断面図である。FIG. 16 is a cross-sectional view taken along line GG in FIG. 15. 図１５のＨ−Ｈ線矢視断面図である。It is a HH arrow directional cross-sectional view of FIG. 図１９のＪ−Ｊ線矢視断面図である。FIG. 20 is a cross-sectional view taken along line JJ in FIG. 19. 図１５の可動ユニットが収納位置に位置した状態を示す斜視図である。FIG. 16 is a perspective view showing a state where the movable unit of FIG. 15 is located at the storage position. 図２２の側面図である。It is a side view of FIG. 図２２の平面図である。FIG. 23 is a plan view of FIG. 22. 図２２の底面図である。FIG. 23 is a bottom view of FIG. 22. 図２５のＫ−Ｋ線矢視断面図である。It is KK arrow sectional drawing of FIG. 図２６のＬ−Ｌ線矢視断面図である。It is LL sectional view taken on the line of FIG. 図２６のＭ−Ｍ線矢視断面図である。FIG. 27 is a cross-sectional view taken along line MM in FIG. 26. 本発明の実施の形態の第３例を示す斜視図である。It is a perspective view which shows the 3rd example of embodiment of this invention. 図２９の側面図である。FIG. 30 is a side view of FIG. 29. 図２９の平面図である。FIG. 30 is a plan view of FIG. 29. 図２９の底面図である。FIG. 30 is a bottom view of FIG. 29. 図３２のＮ−Ｎ線矢視断面図である。FIG. 33 is a cross-sectional view taken along line NN in FIG. 32. 図３３のＰ−Ｐ線矢視断面図である。It is PP sectional view taken on the line of FIG. 図３３のＱ−Ｑ線矢視断面図である。It is a QQ arrow directional cross-sectional view of FIG. 図３３のＲ−Ｒ線矢視断面図である。FIG. 34 is a cross-sectional view taken along line RR in FIG. 33. 図２９の可動ユニットが収納位置に位置した状態を示す斜視図である。FIG. 30 is a perspective view showing a state in which the movable unit in FIG. 29 is located at the storage position. 図３７の側面図である。It is a side view of FIG. 図３７の平面図である。FIG. 38 is a plan view of FIG. 37. 図３７の底面図である。FIG. 38 is a bottom view of FIG. 37. 図４０のＳ−Ｓ線矢視断面図である。It is SS sectional view taken on the line of FIG. 図４１のＴ−Ｔ線矢視断面図である。FIG. 42 is a cross-sectional view taken along line TT in FIG. 41. 図４１のＵ−Ｕ線矢視断面図である。FIG. 42 is a cross-sectional view taken along the line U-U in FIG. 41. 図４１のＶ−Ｖ線矢視断面図である。It is a VV arrow directional cross-sectional view of FIG. 図４１のＷ−Ｗ線矢視断面図である。It is a WW arrow directional cross-sectional view of FIG.

Explanation of symbols

１可動ユニット
２チューブ
３ホルダー
４固定用翼
６カヌラ
６Ａ刃先
７ハブ
８操作体
１５スライダー
１６揺動アーム
２５ロック部
２６保護筒
２７ガイド部材
２７Ｂ凹設部
２８カバー
３４ガイド溝
３７係合溝部
３８揺動片部
５１係合突起
５５係合片
５６係合凹部
６３係合溝部
６７固定体
６８係合突起
６９空洞部
７０係合凹部
７３係合爪 DESCRIPTION OF SYMBOLS 1 Movable unit 2 Tube 3 Holder 4 Fixing wing 6 Canula 6A Cutting edge 7 Hub 8 Operation body 15 Slider 16 Swing arm 25 Lock part 26 Protection cylinder 27 Guide member 27B Concave part 28 Cover 34 Guide groove 37 Engagement groove part 38 Swing Moving piece 51 Engaging projection 55 Engaging piece 56 Engaging recess 63 Engaging groove 67 Fixed body 68 Engaging projection 69 Cavity 70 Engaging recess 73 Engaging claw

Claims

A. A movable unit having a cannula and a cylindrical hub having a rear part of the cannula inserted in the front; A tube connected to the rear of the hub and communicating with the cannula;
C. With a holder,
D. Having fixing wings having flexibility;
The movable unit is slidable in the axial direction on the holder, and can be repositioned to the use position and the storage position at the rear of the use position, and can be moved when the movable unit is located at the use position. In the indwelling needle with wings, in which the unit is detachably engaged with the holder and the movable unit is fixed to the holder,
Holder is
I. When the movable unit is located at the front of the holder and the movable unit is in the use position, the cannula protrudes forward from the front end, and when the movable unit is in the stowed position, only the front part including the blade of the cannula is inside. A protective cylinder which is housed and provided with fixing wings;
B. The plate has a plate shape that is upward and downward, and is located at the rear of the holder to guide the sliding of the movable unit. When the movable unit is located at the storage position, it engages with the movable unit. Te, it has a guide member for fixing the movable unit,
When the movable unit is located at the use position, the tube is positioned above the guide member, and the guide member allows the tube to move upward,
A winged indwelling needle in which a concave portion is formed on the lower surface of the guide member to bend the guide member upward in a curved projection when an axial compressive force is applied .

The movable unit has an operation body for operating the movable unit fixed to the hub,
The operating body is
A. A swing arm that is swingable and engages the holder removably by swinging when the movable unit is in the use position;
B. It has a slider that can slide in the axial direction with respect to the guide member,
At the rear of the guide member,
Slider engaging with, winged indwelling needle according to claim 1 Symbol placing engagement means for fixing the movable unit at the storage position provided.

Holder is
A. A substantially ring-shaped lock portion connected to the rear end portion of the protective cylinder and the front end portion of the guide member and detachably engaged with the swing arm;
B. The indwelling needle with a wing according to claim 2 , further comprising a cover that extends rearward from the lock portion and covers the midway portion in the axial direction of the cannula when the movable unit is located at the storage position.

A. A movable unit having a cannula, a hub rear is cylindrical which is inserted in front of the cannula, B. A tube connected to the rear of the hub and communicating with the cannula;
C. With a holder,
D. Flexible wing
Have
The movable unit is slidable in the axial direction on the holder, and can be repositioned to the use position and the storage position at the rear of the use position, and can be moved when the movable unit is located at the use position. In the indwelling needle with wings, in which the unit is detachably engaged with the holder and the movable unit is fixed to the holder,
Holder is
I. When the movable unit is located at the front of the holder and the movable unit is in the use position, the cannula protrudes forward from the front end , and when the movable unit is located at the retracted position, only the front part including the blade of the cannula is inside. A protective cylinder which is housed and provided with fixing wings;
B. Located in the rear of the holder, as well as guiding the sliding of the movable unit, when the movable unit is positioned at the storage position, guides member which engages the movable unit, to fix the movable unit
Have
The movable unit
A. An operating body for operating the movable unit fixed to the hub;
B. A hub and a guide member are provided so as to be slidable in the axial direction. When the movable unit is moved to the storage position, a fixed body that engages the hub and the guide member so as not to be detached and fixes the movable unit to the storage position. Have
The operating body is
• A winged indwelling needle that has a swinging arm that is swingable and that engages and disengages with the holder by swinging when the movable unit is in the use position.

The guide member has a plate shape having a surface shape upward and downward ,
The indwelling needle with a wing according to claim 4, wherein when the movable unit is located at the use position, the tube is positioned above the guide member, and the guide member allows the tube to move upward.

The indwelling needle with a wing according to claim 5, wherein a concave portion is formed on the lower surface of the guide member to bend the guide member in a curved protrusion upward when an axial compressive force is applied.

The fixed body is hollow,
A hub and a guide member are inserted through the inside,
An engagement protrusion and an engagement recess are formed inside the fixed body,
The hub is formed with an engaging groove that can be engaged with the engaging protrusion so as not to be detached.
The indwelling needle with a wing according to any one of claims 4 to 6, wherein an engagement claw that can be engaged with an engagement recess is formed at a rear portion of the guide member.