JP2010187984A

JP2010187984A - Medical needle device

Info

Publication number: JP2010187984A
Application number: JP2009036633A
Authority: JP
Inventors: Takahide Nakanishi; 高英中西; Eiji Sanada; 英司眞田
Original assignee: JMS Co Ltd
Current assignee: JMS Co Ltd
Priority date: 2009-02-19
Filing date: 2009-02-19
Publication date: 2010-09-02

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical needle device capable of certainly holding an injection needle in a projected state, capable of easily releasing the projected state of the injection needle and capable of safely housing the injection needle. <P>SOLUTION: The medical needle device includes a needle base part 70 having the injection needle 11 mounted at its leading end and having a tube 40 fitted in its rear end, a sheath part 80 externally fitted to the needle base part 70 in a state slidable forward and backward from a needling position to a housing position, having blade parts 21 and 22 bonded thereto and internally supporting the needle base part 70, and a position control mechanism for controlling the position of the sheath part 80 with respect to the needle base part 70 at the needling position and the housing position. The position control mechanism at the needling position is composed of a lock member 90 being a separate member fitted in the sheath part 80 and having an annular rib 91 and a rear stopper 71 formed to the needle base part 70, and the position control mechanism at the housing position is composed of a locking part 81 formed to the sheath part 80 and a front stopper 72 formed to the front part 70b of the needle base part 70. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、例えば、輸液や輸血、体外血液循環等の処置の際に使用され、粘着テープを介して患者の皮膚上に固定される翼部を有する医療用針装置に関するものである。 The present invention relates to a medical needle device that has a wing portion that is used on a patient's skin via an adhesive tape, for example, used in treatments such as infusion, blood transfusion, and extracorporeal blood circulation.

血液透析療法など、輸液や輸血、体外血液循環等の処置の際に使用され、粘着テープを介して患者の皮膚上に固定される翼部を有する医療用針装置が広く使用されている。
医療用針装置は、例えば、図１７に示すように、先端部１０ａに注射針１１が装着されるとともに後端１０ｂにチューブ４０が被嵌された針基部１０と、針基部１０に外挿されるとともに左右両側面部に一対の翼部２１，２２が結合され内方で針基部１０を支持する略円筒状の鞘部２０を備えている。翼部２１，２２の表面には凸条２３，２６と条溝２４，２５が形成され、翼部２１，２２の重ね合わせ時には、凸条２３と条溝２４が、また条溝２５と凸条２６がそれぞれ係合するようになっている。 2. Description of the Related Art Medical needle devices that have wings that are used on treatments such as hemodialysis therapy such as infusion, blood transfusion, extracorporeal blood circulation, and the like, are fixed on a patient's skin via an adhesive tape.
For example, as shown in FIG. 17, the medical needle device is extrapolated to the needle base 10 with the injection needle 11 attached to the distal end portion 10 a and the tube 40 fitted to the rear end 10 b, and the needle base 10. In addition, a pair of wing parts 21 and 22 are coupled to both the left and right side surface parts, and a substantially cylindrical sheath part 20 that supports the needle base part 10 inside is provided. On the surface of the wings 21 and 22, the ridges 23 and 26 and the grooves 24 and 25 are formed. When the wings 21 and 22 are overlapped, the ridges 23 and the grooves 24 are formed, and the grooves 25 and the ridges are formed. 26 are engaged with each other.

このような医療用針装置１は、注射針１１を患者の血管に穿刺して血管を確保した後、広げられた一対の翼部２１，２２を患者の皮膚表面に粘着テープ（図示しない）で固定して使用され、療法終了後には、注射針１１を患者より抜去し、図１９に示すように注射針１１にキャップ３０を嵌めた状態で廃棄されている。 In such a medical needle device 1, after the injection needle 11 is punctured into the blood vessel of the patient to secure the blood vessel, the pair of spread wings 21 and 22 are attached to the patient's skin surface with an adhesive tape (not shown). After the therapy is completed, the injection needle 11 is removed from the patient and discarded with the cap 30 fitted on the injection needle 11 as shown in FIG.

しかしながら、使用後の医療用針装置１を一方の手で持ち、他方の手で持ったキャップ３０を注射針１１に嵌める際、誤ってキャップ３０を持っている指に注射針１１を刺してしまうことがあるので、エイズや肝炎などの感染の観点から問題である。 However, when the medical needle device 1 after use is held with one hand and the cap 30 held with the other hand is fitted into the injection needle 11, the injection needle 11 is accidentally stabbed into the finger holding the cap 30. It is a problem from the viewpoint of infections such as AIDS and hepatitis.

これに対して、図２０及び２１に示すような医療用針装置１が開示されている（例えば、特許文献１参照）。 On the other hand, a medical needle device 1 as shown in FIGS. 20 and 21 is disclosed (for example, see Patent Document 1).

特公平６−７８６１号公報Japanese Patent Publication No. 6-7861

この図２０及び図２１に示す医療用針装置１は、先端部１０ａに注射針１１が装着されるとともに後端１０ｂにチューブ４０が被嵌された針基部１０と、注射針１１を突出する穿刺位置から注射針１１を収納する収納位置まで前後にスライド可能な状態で針基部１０に外挿されるとともに、左右両側面部に一対の翼部５１，５２が結合され内方で針基部１０を支持する略円筒状の鞘部５０とを備える。
ここで、針基部１０の先端部１０ａの外周には、周面方向に１８０°異なる位置に二つの浅い溝１０ｃが設けられ、溝１０ｃの先端部側及び後端部側には一段深い凹部１０ｄ，１０ｅが設けられている。鞘部５０の後端部５０ａ内周には、二つの掛止突起５０ｂが凸設されている。この掛止突起５０ｂは、医療用針装置１の使用前には、針基部１０の先端部１０ａ側の凹部１０ｄに嵌合され、医療用針装置１を使用するときには、針基部１０の溝１０ｃを通るように移動させて針基部１０の後端部１０ｂ側の凹部１０ｅに嵌合される。医療用針装置１の使用後は、掛止突起５０ｂを再び針基部１０の溝１０ｃを通るように移動させて再び針基部１０の先端部１０ａ側の凹部１０ｄに嵌合させる。なお、医療用針装置１の使用前に注射針１１をキャップ（図示しない）で被うようにしてもよい。 The medical needle device 1 shown in FIGS. 20 and 21 includes a needle base 10 in which an injection needle 11 is attached to a distal end portion 10a and a tube 40 is fitted to a rear end 10b, and a puncture projecting the injection needle 11 The needle base 10 is externally inserted in a state where it can slide back and forth from the position to the storage position for storing the injection needle 11, and a pair of wings 51 and 52 are coupled to the left and right side surfaces to support the needle base 10 inward. A substantially cylindrical sheath 50.
Here, two shallow grooves 10c are provided on the outer periphery of the distal end portion 10a of the needle base 10 at positions different from each other by 180 ° in the circumferential direction, and a recessed portion 10d that is one step deeper on the distal end side and the rear end side of the groove 10c. , 10e are provided. On the inner periphery of the rear end portion 50a of the sheath portion 50, two hooking projections 50b are provided so as to project. The latching protrusion 50b is fitted into the recess 10d on the distal end portion 10a side of the needle base 10 before the use of the medical needle device 1, and when the medical needle device 1 is used, the groove 10c of the needle base 10 is used. The needle base 10 is fitted into the recess 10e on the rear end 10b side. After the use of the medical needle device 1, the latching protrusion 50 b is again moved so as to pass through the groove 10 c of the needle base 10 and is again fitted into the recess 10 d on the distal end portion 10 a side of the needle base 10. In addition, you may make it cover the injection needle 11 with a cap (not shown) before using the medical needle device 1.

特許文献１に記載されたような医療用針装置１を使用する場合、穿刺位置において鞘部５０を確実に固定する必要がある。
しかしながら、その固定方法は、図２１に示すように、鞘部５０の後部で掛止突起５０ｂを針基部１０に設けられた凹部１０ｅに嵌合させるだけであるので、鞘部５０に不意に力が加わると掛止突起５０ｂが凹部１０ｅを乗り越え掛止突起５０ｂと凹部１０ｅとの嵌合が解除されるおそれがある。
その結果、穿刺する際に鞘部５０の不意なスライドによって注射針１１が医者や看護士の指に刺さる可能性は否定できず、安全性が高いとは言い難い。 When using the medical needle device 1 as described in Patent Document 1, it is necessary to securely fix the sheath portion 50 at the puncture position.
However, as shown in FIG. 21, the fixing method is merely to fit the latching protrusion 50 b into the recess 10 e provided in the needle base portion 10 at the rear portion of the sheath portion 50. Is applied, the latching protrusion 50b may get over the recess 10e and the fitting between the latching protrusion 50b and the recess 10e may be released.
As a result, the possibility that the injection needle 11 may pierce the doctor or nurse's finger due to an unexpected slide of the sheath 50 during puncturing cannot be denied, and it is difficult to say that the safety is high.

これに対して、掛止突起５０ｂの突出量を大きくしそれに嵌合する針基部１０の凹部１０ｅを深く形成すると、穿刺位置における鞘部５０と針基部１０との嵌合力は強くなり、注射針１１を突出した状態で保持することができるが、鞘部５０と針基部１０との解除が容易ではなく注射針１１の収納が困難となる。 On the other hand, when the protrusion amount of the latching protrusion 50b is increased and the concave portion 10e of the needle base portion 10 fitted therein is formed deeply, the fitting force between the sheath portion 50 and the needle base portion 10 at the puncture position becomes strong, and the injection needle 11 can be held in a protruding state, but the release of the sheath 50 and the needle base 10 is not easy and the storage of the injection needle 11 becomes difficult.

そこで、本発明の目的とするところは、注射針を突出した状態で確実に保持するとともにその状態の解除が容易にでき、しかも注射針を安全に収納できる医療用針装置を提供することにある。 Accordingly, an object of the present invention is to provide a medical needle device that can securely hold an injection needle in a protruding state, can be easily released, and can safely store the injection needle. .

上記の目的を達成するために、本発明の請求項１に記載の医療用針装置（６１，１１１）は、先端に注射針（１１）が装着されるとともに後端にチューブ（４０）が被嵌された針基部（７０）と、前記注射針（１１）を突出する穿刺位置から前記注射針（１１）を収納する収納位置まで前後にスライド可能な状態で前記針基部（７０）に外挿されるとともに、左右両側面部に一対の翼部（２１，２２）が結合され内方で前記針基部（７０）を支持する略円筒状の鞘部（８０）と、前記穿刺位置及び前記収納位置にて、前記鞘部（８０）を前記針基部（７０）に対して位置決め固定する位置規制機構を備える医療用針装置であって、前記穿刺位置の位置規制機構は、前記鞘部（８０）の後部（８０ａ）に嵌め込まれた別体のロック部材（９０，１２０）と、前記針基部（７０）の後部（７０ａ）に形成され、前記ロック部材（９０，１２０）と係合して前記ロック部材（９０，１２０）の前方の移動を阻止する後部ストッパー（７１）からなり、前記収納位置の位置規制機構は、前記鞘部（８０）の後部（８０ａ）に形成された係止部（８１）と、前記針基部（７０）の前部（７０ｂ）に形成され、前記係止部（８１）と係合して前記鞘部（８０）の前後の移動を阻止する前部ストッパー（７２）からなることを特徴とする。 In order to achieve the above object, the medical needle device (61, 111) according to claim 1 of the present invention has an injection needle (11) attached to the tip and a tube (40) covered at the rear end. The fitted needle base (70) and the needle base (70) are extrapolated in a state of being slidable back and forth from a puncture position where the injection needle (11) protrudes to a storage position where the injection needle (11) is stored. A pair of wings (21, 22) coupled to the left and right side surfaces, and a substantially cylindrical sheath (80) supporting the needle base (70) inward, and the puncture position and the storage position. And a medical needle device comprising a position restricting mechanism for positioning and fixing the sheath (80) with respect to the needle base (70), wherein the position restricting mechanism at the puncture position is the position of the sheath (80). Separate lock member (90, 20) and a rear stopper (70a) formed at the rear portion (70a) of the needle base (70) and engaged with the locking member (90, 120) to prevent the locking member (90, 120) from moving forward. 71), and the position restricting mechanism of the storage position is provided in a locking part (81) formed in the rear part (80a) of the sheath part (80) and a front part (70b) of the needle base part (70). It is formed of a front stopper (72) that engages with the locking portion (81) and prevents the sheath portion (80) from moving back and forth.

また、請求項２に記載の医療用針装置（６１）は、前記後部ストッパー（７１）は、前記針基部（７０）の後部（７０ａ）に形成された径を部分的に小さくした段差部であり、前記ロック部材（９０）は、前記針基部（７０）に外挿される略円筒状で前記鞘部（８０）に対して前記穿刺位置では結合されるが前記収納時には分離されるとともに、その後部（９０ａ）内周には前記後部ストッパー（７１）に係合する環状リブ（９１）が設けられていることを特徴とする。 Further, in the medical needle device (61) according to claim 2, the rear stopper (71) is a step portion formed by partially reducing the diameter formed in the rear portion (70a) of the needle base portion (70). The locking member (90) is substantially cylindrical and is externally attached to the needle base (70), and is coupled to the sheath (80) at the puncture position, but is separated at the time of storage. An annular rib (91) that engages with the rear stopper (71) is provided on the inner periphery of the portion (90a).

また、請求項３に記載の医療用針装置（６１）は、前記鞘部（８０）の後部（８０ａ）外周には凸部（８２，８３）が形成されるとともに、前記ロック部材（９０）の内周には先端から後方へ延びさらに周方向に屈曲し、前記凸部（８２，８３）を案内する略Ｌ字状の溝（９２，９３）が形成されていることを特徴とする。 Further, in the medical needle device (61) according to claim 3, a convex portion (82, 83) is formed on the outer periphery of the rear portion (80a) of the sheath portion (80), and the locking member (90). A substantially L-shaped groove (92, 93) is formed on the inner periphery of the groove, extending rearward from the tip and bending in the circumferential direction to guide the convex portions (82, 83).

また、請求項４に記載の医療用針装置（６１）は、前記略Ｌ字状の溝（９２，９３）の周方向の終端には、前記鞘部（８０）に形成された凸部（８２，８３）を固定する段（９４，９５）が設けられていることを特徴とする。 Further, the medical needle device (61) according to claim 4 has a convex portion (80) formed on the sheath portion (80) at the circumferential end of the substantially L-shaped groove (92, 93). 82, 83) is provided with steps (94, 95) for fixing.

また、請求項５に記載の医療用針装置（６１）は、前記鞘部（８０）と前記ロック部材（９０）は螺合されることにより嵌め込まれることを特徴とする。 The medical needle device (61) according to claim 5 is characterized in that the sheath (80) and the lock member (90) are fitted by being screwed together.

また、請求項６に記載の医療用針装置（１１１）は、前記後部ストッパー（７１）は、前記針基部（７０）の後部（７０ａ）に形成された径を部分的に小さくした段差部であり、前記ロック部材（１２０）は、前記鞘部（８０）の後部（８０ａ）に形成された孔（８５）に対して、前記鞘部（８０）の前後に垂直な方向に移動可能に挿入され、前記鞘部（８０）の外径よりも大きい曲率の大円弧部（１２１）と、前記鞘部（８０）の外径よりも小さくかつ前記後部ストッパー（７１）の外径よりも大きい曲率の小円弧部（１２２）を有するピン片（１２０）であり、前記穿刺位置では、前記ピン片（１２０）の小円弧部（１２２）に前記後部ストッパー（７１）を嵌合させるように前記ピン片（１２０）を移動させ、前記収納時には前記後部ストッパー（７１）に前記ピン片（１２０）の大円弧部（１２１）を位置合わせし前記後部ストッパー（７１）との嵌合を解除するように前記ピン片（１２０）を移動させることを特徴とする。 Further, in the medical needle device (111) according to claim 6, the rear stopper (71) is a step portion formed by partially reducing the diameter formed in the rear portion (70a) of the needle base portion (70). The lock member (120) is inserted into a hole (85) formed in the rear part (80a) of the sheath part (80) so as to be movable in a direction perpendicular to the front and rear of the sheath part (80). A large arc portion (121) having a curvature larger than the outer diameter of the sheath portion (80), and a curvature smaller than the outer diameter of the sheath portion (80) and larger than the outer diameter of the rear stopper (71). A pin piece (120) having a small arc portion (122) of the pin, and at the puncture position, the pin is arranged so that the rear stopper (71) is fitted to the small arc portion (122) of the pin piece (120). Move the piece (120) and the rear The pin piece (120) is moved so that the large arc portion (121) of the pin piece (120) is aligned with the topper (71) and the fitting with the rear stopper (71) is released. To do.

また、請求項７に記載の医療用針装置（１１１）は、前記ピン片（１２０）は、前記鞘部（８０）に対して前記ピン片（１２０）を移動させるときの持ち手になる把持部（１２３）と、前記収納時に前記鞘部（８０）に当接して、前記後部ストッパー（７１）に前記ピン片（１２０）の大円弧部（１２１）を位置合わせする鍔部（１２４）をさらに有することを特徴とする。 Further, in the medical needle device (111) according to claim 7, the pin piece (120) is a handle that is used as a handle when the pin piece (120) is moved relative to the sheath part (80). And a flange (124) that abuts the sheath (80) during the storage and aligns the large arc portion (121) of the pin piece (120) with the rear stopper (71). Furthermore, it is characterized by having.

また、請求項８に記載の医療用針装置（６１，１１１）は、前記前部ストッパー（７２）は、前記針基部（７０）の前部（７０ａ）に形成された径を部分的に小さくした段差部であり、前記鞘部（８０）に形成された係止部（８１）は、前記鞘部（８０）の後部（８０ａ）内周に設けられ、前記前部ストッパー（７２）に係合する環状リブであることを特徴とする。 Further, in the medical needle device (61, 111) according to claim 8, the front stopper (72) has a partially reduced diameter formed at the front part (70a) of the needle base part (70). The locking part (81) formed on the sheath part (80) is provided on the inner periphery of the rear part (80a) of the sheath part (80) and is engaged with the front stopper (72). It is characterized by being an annular rib.

ここで、上記括弧内の記号は、図面および後述する発明を実施するための最良の形態に掲載された対応要素または対応事項を示す。 Here, the symbols in the parentheses indicate corresponding elements or corresponding matters described in the drawings and the best mode for carrying out the invention described later.

本発明の請求項１に記載の医療用針装置によれば、穿刺位置及び収納位置にて、鞘部を針基部に対して位置決め固定する位置規制機構を備えているので、医療用針装置の使用時及び廃棄時に注射針の前後方向の動きが規制される。
特に、使用時にはロック部材と後部ストッパーとの係合により、鞘部が針基部に対して前方へスライド移動することが阻止されるので、処置中に不意に注射針が鞘部に収納されることはない。
その結果、患者の血管に穿刺している際に誤って鞘部が針基部に対して前方にスライドして注射針で患者を傷つけたり、あるいは注射針が血管から抜けることがないので、安全に処置が行える。また、穿刺する際に鞘部の不意なスライドによって注射針が医者や看護士の指に刺さるおそれもなく安全である。
また、注射針を収納する収納位置の位置規制機構は、鞘部の後部に形成された係止部と前部ストッパーとの係合によるので、医療用針装置の廃棄時に、収納位置で鞘部を針基部に対して位置決め固定した後に再び注射針が突出することが防止され安全である。 According to the medical needle device of the first aspect of the present invention, the medical needle device includes the position regulating mechanism that positions and fixes the sheath portion with respect to the needle base portion at the puncture position and the storage position. The movement of the injection needle in the front-rear direction is restricted during use and disposal.
In particular, since the sheath is prevented from sliding forward relative to the needle base due to the engagement between the lock member and the rear stopper during use, the injection needle is unexpectedly stored in the sheath during the procedure. There is no.
As a result, when the patient's blood vessel is punctured, the sheath does not accidentally slide forward with respect to the needle base and the patient is injured by the injection needle, or the injection needle does not come out of the blood vessel, so it is safe. Treatment can be performed. In addition, when the needle is punctured, there is no risk of the injection needle sticking to the doctor or nurse's finger due to an unexpected slide of the sheath.
In addition, since the position restriction mechanism for the storage position for storing the injection needle is based on the engagement between the locking portion formed at the rear of the sheath and the front stopper, the sheath at the storage position when the medical needle device is discarded. After the needle is positioned and fixed with respect to the needle base, it is safe to prevent the injection needle from protruding again.

また、請求項２に記載の医療用針装置によれば、請求項１に記載の発明の作用効果に加え、後部ストッパーは、針基部の後部に形成された径を部分的に小さくした段差部であり、ロック部材は、針基部に外挿される略円筒状で鞘部に対して穿刺位置では結合されるが収納時には分離されるとともに、その後部内周には後部ストッパーに係合する環状リブが設けられているので、段差部に環状リブが当接することでそれより前方へロック部材が移動することはないので、確実に注射針が突出した状態を保持することができる。 According to the medical needle device of the second aspect, in addition to the function and effect of the invention of the first aspect, the rear stopper has a stepped portion in which the diameter formed at the rear portion of the needle base portion is partially reduced. The locking member is a substantially cylindrical shape that is extrapolated to the needle base and is coupled to the sheath at the puncture position, but is separated when housed, and an annular rib that engages with the rear stopper is formed on the inner periphery of the rear portion. Since it is provided, since the locking member does not move forward when the annular rib comes into contact with the stepped portion, the state in which the injection needle protrudes can be reliably maintained.

また、請求項３に記載の医療用針装置によれば、請求項１又は２に記載の発明の作用効果に加え、鞘部の後部外周には凸部が形成されるとともに、ロック部材の内周には先端から後方へ延びさらに周方向に屈曲し、凸部を案内する略Ｌ字状の溝が形成されているので、鞘部の針基部に対する位置決め固定は、ロック部材を周方向に回転させることにより解除されるようになっているので不意には位置決め固定が解除されることはなく、操作も容易である。 According to the medical needle device of the third aspect, in addition to the function and effect of the invention of the first or second aspect, a convex portion is formed on the outer periphery of the rear portion of the sheath portion, and the inside of the lock member Since the circumference extends backward from the tip and bends in the circumferential direction to form a substantially L-shaped groove that guides the convex portion, positioning and fixing of the sheath portion to the needle base rotates the locking member in the circumferential direction. Therefore, the positioning and fixing is not released unexpectedly, and the operation is easy.

また、請求項４に記載の医療用針装置によれば、請求項３に記載の発明の作用効果に加え、略Ｌ字状の溝の周方向の終端には、鞘部に形成された凸部を固定する段が設けられているので、ロック部材が周方向へ不意に回転してしまうこともなく、より安全である。 According to the medical needle device of the fourth aspect, in addition to the function and effect of the invention of the third aspect, at the end in the circumferential direction of the substantially L-shaped groove, a convex formed on the sheath portion. Since the step for fixing the portion is provided, the lock member does not rotate unexpectedly in the circumferential direction, which is safer.

また、請求項５に記載の医療用針装置によれば、請求項１又は２に記載の発明の作用効果に加え、鞘部とロック部材は螺合されることにより嵌め込まれるので、意識的にロック部材を回転させない限り、鞘部とロック部材が分離することはない。よって、処置中に不意に注射針が血管から抜けず、安全である。 Further, according to the medical needle device of the fifth aspect, in addition to the function and effect of the invention of the first or second aspect, the sheath portion and the lock member are fitted by being screwed together. Unless the lock member is rotated, the sheath and the lock member are not separated. Therefore, the injection needle is not accidentally removed from the blood vessel during the treatment, and it is safe.

また、請求項６に記載の医療用針装置によれば、請求項１に記載の発明の作用効果に加え、穿刺位置において、ピン片が鞘部の後部の孔に前後に垂直な方向に移動可能に挿入され、ピン片の小円弧部に後部ストッパーが嵌合しているので、針基部に対して鞘部の前後の移動が阻止される。これにより、針基部に対して鞘部の前後の移動が阻止されるので、確実に注射針を突出した状態を保持することができ、安全に処置が行える。
また、収納時には後部ストッパーにピン片の大円弧部を位置合わせするようにピン片を少し移動させるだけで、後部ストッパーと鞘部との嵌合を解除することができるので、嵌合解除方法が容易である。 According to the medical needle device of the sixth aspect, in addition to the function and effect of the invention of the first aspect, the pin piece moves in a direction perpendicular to the rear hole of the sheath portion at the puncture position. Since the rear stopper is fitted to the small arc portion of the pin piece, the movement of the sheath portion in the front-rear direction with respect to the needle base portion is prevented. Thereby, since the back and forth movement of the sheath portion is prevented with respect to the needle base portion, the state in which the injection needle protrudes can be reliably held, and the treatment can be performed safely.
In addition, since the fitting between the rear stopper and the sheath can be released by moving the pin piece a little so that the large arc portion of the pin piece is aligned with the rear stopper at the time of storage, the fitting release method is Easy.

また、請求項７に記載の医療用針装置によれば、請求項６に記載の発明の作用効果に加え、ピン片は、鞘部に対してピン片を移動させるときの持ち手になる把持部を有するので、ピン片の位置合わせがより容易である。
しかも、収納時に鞘部に当接して、後部ストッパーにピン片の大円弧部を位置合わせする鍔部をさらに有するので、ピン片の位置合わせが非常に容易である。つまり、実際に後部ストッパーと大円弧部との位置が合っているか否かは、鞘部が透明でない限り目視できないが、鍔部が鞘部に当接した際に後部ストッパーにピン片の大円弧部が位置合わせされていることを保証しているので、ピン片の位置合わせが非常に容易である。 According to the medical needle device of the seventh aspect, in addition to the function and effect of the invention of the sixth aspect, the pin piece is a grip that becomes a handle when the pin piece is moved relative to the sheath portion. Since it has a portion, it is easier to align the pin pieces.
In addition, since it has a collar portion that contacts the sheath portion during storage and aligns the large arc portion of the pin piece with the rear stopper, it is very easy to align the pin piece. In other words, whether or not the position of the rear stopper and the large arc portion are actually aligned is not visible unless the sheath portion is transparent, but when the collar comes into contact with the sheath portion, the pin stopper has a large arc on the rear stopper. Since the parts are guaranteed to be aligned, the alignment of the pin pieces is very easy.

また、請求項８に記載の医療用針装置によれば、請求項１に記載の発明の作用効果に加え、前部ストッパーは、針基部の前部に形成された径を部分的に小さくした段差部であり、鞘部に形成された係止部は、鞘部の後部内周に設けられ、前部ストッパーに係合する環状リブであるので、段差部と環状リブが確実に係合することができ、医療用針装置の廃棄時に、収納位置で鞘部を針基部に対して位置決め固定した後に再び注射針が針基部から突出することを防止することができ、安全である。 According to the medical needle device of the eighth aspect, in addition to the function and effect of the invention of the first aspect, the front stopper partially reduces the diameter formed at the front portion of the needle base portion. Since the locking portion formed on the sheath portion is a stepped portion and is an annular rib that is provided on the inner periphery of the rear portion of the sheath portion and engages with the front stopper, the stepped portion and the annular rib reliably engage with each other. When the medical needle device is discarded, it is possible to prevent the injection needle from protruding again from the needle base portion after the sheath portion is positioned and fixed with respect to the needle base portion in the storage position, which is safe.

なお、本発明の医療用針装置のように、穿刺位置の位置規制機構が、鞘部の後部に嵌め込まれた、鞘部とは別体のロック部材と、針基部の後部に形成され前記ロック部材と係合してロック部材の前方の移動を阻止する後部ストッパーからなる点は、上述した特許文献１には全く記載されていない。 Note that, as in the medical needle device of the present invention, the puncture position control mechanism is a lock member that is fitted in the rear part of the sheath part, separate from the sheath part, and formed in the rear part of the needle base part. The point which consists of the rear stopper which engages with a member and blocks | prevents the movement of a locking member ahead is not described in the patent document 1 mentioned above at all.

本発明の第一実施形態に係る医療用針装置で、注射針を突出した状態を示す平面図である。It is a top view which shows the state which protruded the injection needle with the medical needle device which concerns on 1st embodiment of this invention. 図１に示す医療用針装置における針基部を示す平面図である。It is a top view which shows the needle base in the medical needle device shown in FIG. 図１に示す医療用針装置におけるロック部材を示す斜視図である。It is a perspective view which shows the locking member in the medical needle device shown in FIG. 図１に示す医療用針装置における鞘部を示す斜視図である。It is a perspective view which shows the sheath part in the medical needle device shown in FIG. 図１に示す医療用針装置における針基部とロック部材とチューブとの関係を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the relationship between the needle base part in the medical needle device shown in FIG. 1, a locking member, and a tube. 図１に示す医療用針装置における鞘部とロック部材との関係を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the relationship between the sheath part and lock member in the medical needle device shown in FIG. 図１に示す医療用針装置における注射針を収納した状態を示す平面図である。It is a top view which shows the state which accommodated the injection needle in the medical needle device shown in FIG. 図７に示す注射針を収納した状態を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the state which accommodated the injection needle shown in FIG. 本発明の第一実施形態に係る別の医療用針装置を示す平面図である。It is a top view which shows another medical needle apparatus which concerns on 1st embodiment of this invention. 本発明の第二実施形態に係る医療用針装置で、注射針を突出した状態を示す平面図である。It is a top view which shows the state which protruded the injection needle with the medical needle device which concerns on 2nd embodiment of this invention. 図１０に示す医療用針装置における針基部を示す平面図である。It is a top view which shows the needle base part in the medical needle device shown in FIG. 図１０に示す医療用針装置におけるピン片を示す斜視図である。It is a perspective view which shows the pin piece in the medical needle device shown in FIG. 図１０に示す医療用針装置における鞘部を示す斜視図である。It is a perspective view which shows the sheath part in the medical needle device shown in FIG. 図１０に示す医療用針装置におけるピン片の小円弧部に後部ストッパーが嵌合した状態を示す斜視図である。It is a perspective view which shows the state which the rear part stopper fitted to the small circular arc part of the pin piece in the medical needle device shown in FIG. 図１０に示す医療用針装置におけるピン片の大円弧部に鞘部の外径が嵌合した状態を示す斜視図である。It is a perspective view which shows the state which the outer diameter of the sheath part fitted in the large circular arc part of the pin piece in the medical needle device shown in FIG. 図１０に示す医療用針装置における注射針を収納した状態を示す平面図である。It is a top view which shows the state which accommodated the injection needle in the medical needle device shown in FIG. 従来例に係る医療用針装置を示す平面図である。It is a top view which shows the medical needle apparatus which concerns on a prior art example. 図１７に示す医療用針装置の使用時を示す側面図である。It is a side view which shows the time of use of the medical needle device shown in FIG. 図１７に示す医療用針装置の使用後を示す平面図である。It is a top view which shows after use of the medical needle device shown in FIG. 他の従来例に係る医療用針装置を示す横断面図である。It is a cross-sectional view showing a medical needle device according to another conventional example. 図２０に示す医療用針装置の、注射針の突出時を示す横断面図である。It is a cross-sectional view which shows the time of protrusion of an injection needle of the medical needle device shown in FIG.

（第一実施形態）
図１乃至図８を参照して、本発明の第一実施形態に係る医療用針装置６１を説明する。
この医療用針装置６１は、別部品で構成された針基部７０と鞘部８０とロック部材９０とを備えている。 (First embodiment)
With reference to FIG. 1 thru | or FIG. 8, the medical needle apparatus 61 which concerns on 1st embodiment of this invention is demonstrated.
The medical needle device 61 includes a needle base portion 70, a sheath portion 80, and a lock member 90 that are configured as separate parts.

針基部７０は、図１及び図２に示すように、先端に注射針１１が装着されるとともに後端にチューブ４０が被嵌されている。
針基部７０の後部７０ａにはロック部材９０と係合する段差部７１が形成されている。段差部７１は、略円筒状の針基部７０の外径に比べ、径が部分的に小さく形成されたものであり、ロック部材９０の前方の移動を阻止する後部ストッパー７１として機能する。 As shown in FIGS. 1 and 2, the needle base 70 has the injection needle 11 attached to the tip and the tube 40 fitted to the rear end.
A stepped portion 71 that engages with the lock member 90 is formed in the rear portion 70 a of the needle base portion 70. The stepped portion 71 is formed to be partially smaller in diameter than the outer diameter of the substantially cylindrical needle base portion 70 and functions as a rear stopper 71 that prevents the lock member 90 from moving forward.

また、針基部７０の前部にも、後述する係止部８１と係合する段差部７２が形成されている。段差部７２は、略円筒状の針基部７０の外径に比べ、径が部分的に小さく形成されたものであり、鞘部８０の前後の移動を阻止する前部ストッパー７２として機能する。そして、収納時における鞘部８０の前後の移動をより効果的に阻止できるように、前部７０ｂの段差部７２の前後にはそれぞれ、針基部７０の外周面から突出する環状リブ７３，７４が形成されている。
なお、針基部７０はＰＣ（ポリカーボネート）、注射針１１はＳＵＳ（ステンレス鋼）、チューブ４０はＰＶＣ（塩化ビニル樹脂）からそれぞれなる。 Further, a stepped portion 72 that engages with a locking portion 81 to be described later is also formed at the front portion of the needle base portion 70. The stepped portion 72 is formed to be partially smaller in diameter than the outer diameter of the substantially cylindrical needle base 70 and functions as a front stopper 72 that prevents the sheath 80 from moving back and forth. Then, annular ribs 73 and 74 projecting from the outer peripheral surface of the needle base portion 70 are respectively provided on the front and rear of the stepped portion 72 of the front portion 70b so as to more effectively prevent the movement of the sheath portion 80 during storage. Is formed.
The needle base 70 is made of PC (polycarbonate), the injection needle 11 is made of SUS (stainless steel), and the tube 40 is made of PVC (vinyl chloride resin).

鞘部８０は、図４に示すように、左右両側面部に一対の翼部２１，２２が結合され内方で針基部７０を支持する略円筒状の部品である。鞘部８０の後部８０ａ外周の左右両側面にはそれぞれ略直方体の凸部８２，８３が形成されている。
そして、図８に示すように、鞘部８０の後部８０ａ内周に、前部ストッパー７２に係合する係止部８１として機能する環状リブ８１が形成されている。
なお、環状リブ８１の前後方向の長さ（厚さ）は、針基部７０の前部７０ｂに形成された段差部７２の前後方向の長さよりも短い。 As shown in FIG. 4, the sheath portion 80 is a substantially cylindrical component that supports a needle base portion 70 inward by a pair of wing portions 21, 22 coupled to both left and right side portions. On the left and right side surfaces of the outer periphery of the rear portion 80a of the sheath portion 80, substantially rectangular parallelepiped convex portions 82 and 83 are formed, respectively.
And as shown in FIG. 8, the annular rib 81 which functions as the latching | locking part 81 engaged with the front part stopper 72 at the inner periphery of the rear part 80a of the sheath part 80 is formed.
The length (thickness) in the front-rear direction of the annular rib 81 is shorter than the length in the front-rear direction of the stepped portion 72 formed on the front portion 70 b of the needle base 70.

このような鞘部８０が、図１に示すように注射針１１を突出する穿刺位置から、図７に示すように注射針１１を収納する収納位置まで前後にスライド可能な状態で針基部７０に外挿されている。
なお、使用時には一対の翼部２１，２２を重ね合わせる必要があるため、鞘部８０は軟質の材料であるＰＥ（ポリエチレン）からなる。 Such a sheath 80 is slidable back and forth from a puncture position where the injection needle 11 protrudes as shown in FIG. 1 to a storage position where the injection needle 11 is stored as shown in FIG. Extrapolated.
In addition, since it is necessary to overlap a pair of wing | blade parts 21 and 22 at the time of use, the sheath part 80 consists of PE (polyethylene) which is a soft material.

ロック部材９０は、図３に示すように、鞘部８０の後部８０ａに嵌め込まれた、鞘部８０及び針基部７０とは別体の略円筒状の部品である。
その後部９０ａ内周には後部ストッパー７１に係合する環状リブ９１が設けられている。この環状リブ９１によりロック部材９０の後部９０ａ内周に形成される孔９６の直径は、針基部７０の後部７０ａに形成された段差部７１の径よりも若干大きい。
また、ロック部材９０の内周には先端から後方へ延びさらに周方向に屈曲し、鞘部８０の後部８０ａ外周に形成された凸部８２，８３を案内する略Ｌ字状の二つの溝９２，９３が、周方向に１８０°軸対称に形成されている。そして、溝９２，９３の周方向の終端には、鞘部８０に形成された凸部８２，８３を固定する深い溝の段９４，９５が設けられている。 As shown in FIG. 3, the lock member 90 is a substantially cylindrical component that is fitted into the rear portion 80 a of the sheath portion 80 and is separate from the sheath portion 80 and the needle base portion 70.
An annular rib 91 that engages with the rear stopper 71 is provided on the inner periphery of the rear portion 90a. The diameter of the hole 96 formed in the inner periphery of the rear portion 90 a of the lock member 90 by the annular rib 91 is slightly larger than the diameter of the stepped portion 71 formed in the rear portion 70 a of the needle base 70.
The lock member 90 has two substantially L-shaped grooves 92 that extend backward from the tip and bend in the circumferential direction to guide the convex portions 82 and 83 formed on the outer periphery of the rear portion 80a of the sheath portion 80. , 93 are formed 180 degrees axially symmetrical in the circumferential direction. Further, deep groove steps 94 and 95 for fixing the convex portions 82 and 83 formed on the sheath portion 80 are provided at the circumferential ends of the grooves 92 and 93.

このようなロック部材９０は、図５に示すように、針基部７０に後方から外挿され、後部ストッパー７１とロック部材９０の環状リブ９１が係合するようにしている。また、ロック部材９０の後方からはチューブ４０が針基部７０に後方から被装されている。つまり、ロック部材９０は、後部ストッパー７１によって前方への移動が制限され、後方にはチューブ４０によって移動が制限されている。なお、この状態においてロック部材９０は針基部７０に対して回転自在である。
そして、図６に示すように、穿刺位置において略Ｌ字状の溝９２，９３の周方向の終端の段９４，９５と、鞘部８０の凸部８２，８３が係合した状態で、ロック部材９０は鞘部８０に対して結合される。 As shown in FIG. 5, such a lock member 90 is extrapolated to the needle base portion 70 from the rear so that the rear stopper 71 and the annular rib 91 of the lock member 90 are engaged. Further, the tube 40 is mounted on the needle base portion 70 from the rear side of the lock member 90. That is, the lock member 90 is restricted from moving forward by the rear stopper 71 and restricted from moving backward by the tube 40. In this state, the lock member 90 is rotatable with respect to the needle base 70.
Then, as shown in FIG. 6, in the puncture position, in the state where the steps 94 and 95 at the circumferential ends of the substantially L-shaped grooves 92 and 93 and the convex portions 82 and 83 of the sheath portion 80 are engaged, the lock Member 90 is coupled to sheath 80.

次に、以上のように構成された医療用針装置６１の使用方法及び廃棄方法について説明する。
通常、図１に示すように、鞘部８０の後部８０ａに嵌め込まれたロック部材９０が、針基部７０の後部７０ａに形成された後部ストッパー７１として機能する段差部７１に係合し、注射針１１を突出させた穿刺位置にて、医療用針装置６１は病院等に提供される。そのとき、注射針１１が露出していると危険であるので、注射針１１にはキャップ（図示しない）が嵌められている。
このように、鞘部８０と一体化したロック部材９０が段差部７１に係合してロック部材９０の前方の移動を阻止することにより、注射針１１を突出した状態を確実に保持することができるので、安全に処置が行える。
なお、図７及び図８に示すように、鞘部８０の後部８０ａに形成された係止部８１が、針基部７０の前部７０ｂに形成された前部ストッパー７２として機能する段差部７２に係合し、注射針１１が収納された収納位置にて提供されてもよい。 Next, a usage method and a disposal method of the medical needle device 61 configured as described above will be described.
Normally, as shown in FIG. 1, the locking member 90 fitted into the rear portion 80 a of the sheath portion 80 engages with a stepped portion 71 that functions as a rear stopper 71 formed on the rear portion 70 a of the needle base portion 70, and the injection needle The medical needle device 61 is provided to a hospital or the like at the puncture position where the 11 is protruded. At this time, since it is dangerous if the injection needle 11 is exposed, a cap (not shown) is fitted to the injection needle 11.
As described above, the locking member 90 integrated with the sheath portion 80 engages with the stepped portion 71 and prevents the locking member 90 from moving forward, so that the state in which the injection needle 11 protrudes can be reliably held. Because it is possible, it can be treated safely.
As shown in FIGS. 7 and 8, the locking portion 81 formed on the rear portion 80 a of the sheath portion 80 has a stepped portion 72 that functions as a front stopper 72 formed on the front portion 70 b of the needle base portion 70. It may be engaged and provided at the storage position where the injection needle 11 is stored.

次に、使用時には、キャップ（図示しない）を注射針１１から外して、一対の翼部２１，２２を重ね合わせた状態で把持し、注射針１１を患者の血管に穿刺して血流を確保する。この際、十分な血流が確保できないならば注射針１１の部分を回転し刃面向きを変える。
そして、十分な血流が得られた状態で、一対の翼部２１，２２を広げて両翼部２１，２２を患者の皮膚表面と接触させて、両翼部２１，２２と患者の皮膚表面を粘着テープ（図示しない）で固定する。
次に、療法終了後、注射針１１を患者より抜去する。 Next, in use, the cap (not shown) is removed from the injection needle 11 and held in a state where the pair of wings 21 and 22 are overlapped, and the injection needle 11 is punctured into the blood vessel of the patient to ensure blood flow. To do. At this time, if a sufficient blood flow cannot be secured, the portion of the injection needle 11 is rotated to change the direction of the blade surface.
Then, in a state where sufficient blood flow is obtained, the pair of wings 21 and 22 are spread and both wings 21 and 22 are brought into contact with the patient's skin surface to adhere both wings 21 and 22 and the patient's skin surface. Secure with tape (not shown).
Next, after the end of therapy, the injection needle 11 is removed from the patient.

次に、収納時には、鞘部８０に対してロック部材９０を回転させ、鞘部８０の凸部８２，８３をロック部材９０の溝９２，９３内を移動させることでロック部材９０と鞘部８０とを分離する。そして、針基部７０に対して鞘部８０を前方にスライドさせて、図７及び図８に示すように、係止部８１を前部ストッパー７２たる段差部７２に係合し、収納位置において鞘部８０内に注射針１１を収納し、この医療用針装置６１を廃棄する。 Next, at the time of storage, the lock member 90 is rotated with respect to the sheath portion 80, and the convex portions 82 and 83 of the sheath portion 80 are moved in the grooves 92 and 93 of the lock member 90, thereby causing the lock member 90 and the sheath portion 80 to move. And are separated. Then, the sheath portion 80 is slid forward with respect to the needle base portion 70, and as shown in FIGS. 7 and 8, the locking portion 81 is engaged with the stepped portion 72 which is the front stopper 72, and the sheath portion is in the retracted position. The injection needle 11 is accommodated in the part 80, and this medical needle device 61 is discarded.

このような医療用針装置６１によれば、穿刺位置及び収納位置にて、鞘部８０を針基部７０に対して位置決め固定する位置規制機構を備えているので、医療用針装置６１の使用時及び廃棄時に注射針１１の前後方向の動きが規制される。
特に、使用時にはロック部材９０と後部ストッパー７１との係合により、鞘部８０が針基部７０に対して前方へスライドすることが阻止されるので、処置中に不意に注射針１１が鞘部８０に収納されない。その結果、患者の血管に穿刺している際に誤って鞘部５０が針基部１０に対して前方にスライドして注射針１１で患者を傷つけたり、あるいは注射針１１が血管から抜けることがないので、安全に処置が行える。また、穿刺する際に鞘部５０の不意なスライドによって注射針１１が医者や看護士の指に刺さるおそれもなく安全である。
しかも、後部ストッパー７１は針基部７０の後部７０ａに形成された径を部分的に小さくした段差部７１であり、ロック部材９０の後部９０ａ内周には段差部７１に係合する環状リブ９１が設けられているので、環状リブ９１が段差部７１に当接することでそれより前方へロック部材９０が移動することはないので、確実に注射針１１が突出した状態を保持することができる。 According to such a medical needle device 61, the position control mechanism that positions and fixes the sheath portion 80 with respect to the needle base portion 70 is provided at the puncture position and the storage position. And the movement of the injection needle 11 in the front-rear direction is restricted during disposal.
In particular, the engagement of the lock member 90 and the rear stopper 71 prevents the sheath 80 from sliding forward with respect to the needle base 70 during use. It is not stored in. As a result, when the patient's blood vessel is punctured, the sheath portion 50 does not slide accidentally with respect to the needle base portion 10 to injure the patient with the injection needle 11, or the injection needle 11 does not come out of the blood vessel. Therefore, it can be handled safely. In addition, when the needle is punctured, there is no risk that the injection needle 11 may pierce the doctor or nurse's finger due to an unexpected slide of the sheath 50.
Moreover, the rear stopper 71 is a stepped portion 71 having a partially reduced diameter formed in the rear portion 70a of the needle base 70, and an annular rib 91 that engages with the stepped portion 71 is formed on the inner periphery of the rear portion 90a of the lock member 90. Since the locking member 90 does not move forward when the annular rib 91 abuts against the stepped portion 71 because it is provided, the state in which the injection needle 11 protrudes can be reliably maintained.

なお、段差部７１と環状リブ９１の当接により、鞘部８０の針基部７０に対する前方の移動が阻止された状態であっても、針基部７０は軸方向に回転自在であるので、注射針１１を突出した状態であっても、注射針１１の刃面の向きを変えることができる。
それに加え、ロック部材９０の内周には凸部８２，８３を案内する略Ｌ字状の溝９２，９３が形成され、溝９２，９３は、ロック部材９０の先端から後方に延びさらに周方向に屈曲するものであるので、鞘部８０の針基部７０に対する位置決め固定とその解除は、意識的に行わなければならない。よって、ロック部材９０と鞘部８０の固定とその解除は、不意に生じることはないので安全である。
また、溝９２，９３の周方向の終端には、鞘部８０に形成された凸部８２，８３を固定する段９４，９５が設けられているので、ロック部材９０が周方向へ不意に回転してしまうこともなく、より安全である。 Even if the forward movement of the sheath 80 with respect to the needle base 70 is prevented by the contact between the stepped portion 71 and the annular rib 91, the needle base 70 is rotatable in the axial direction. Even in the state in which 11 is projected, the direction of the blade surface of the injection needle 11 can be changed.
In addition, substantially L-shaped grooves 92 and 93 for guiding the convex portions 82 and 83 are formed on the inner periphery of the lock member 90, and the grooves 92 and 93 extend rearward from the front end of the lock member 90 and further in the circumferential direction. Therefore, the positioning and fixing of the sheath portion 80 with respect to the needle base portion 70 and the release thereof must be performed consciously. Therefore, fixing and releasing the lock member 90 and the sheath portion 80 are safe since they do not occur unexpectedly.
Moreover, since the step | levels 94 and 95 which fix the convex parts 82 and 83 formed in the sheath part 80 are provided in the end of the circumferential direction of the groove | channels 92 and 93, the locking member 90 rotates in the circumferential direction unexpectedly. It ’s safer without having to.

一方、廃棄時には、針基部７０の前部７０ｂに形成された段差部７２と鞘部８０に形成された係止部８１が確実に係合するので、収納位置で鞘部８０を針基部７０に対して位置決め固定して注射針１１を収納した後、注射針１１が再度突出することが防止され、安全である。 On the other hand, at the time of disposal, the stepped portion 72 formed on the front portion 70b of the needle base portion 70 and the locking portion 81 formed on the sheath portion 80 are securely engaged, so that the sheath portion 80 is brought into contact with the needle base portion 70 at the storage position. On the other hand, after the injection needle 11 is housed after being positioned and fixed, the injection needle 11 is prevented from protruding again, which is safe.

なお、本実施形態では、ロック部材９０の内周に略Ｌ字状の溝９２，９３を形成し、鞘部８０の外周には凸部８２，８３を形成するようにしたが、ロック部材９０は穿刺位置で鞘部８０に嵌合する構成であればよい。よって、例えば、図９に示すように、ロック部材９０の内周に雌ネジ９７を形成し、鞘部８０の外周にはこの雌ネジ９７に対応する雄ネジ８４を形成することによって、鞘部８０とロック部材９０を螺合させるようにして嵌め込む構造としてもよい。 In this embodiment, the substantially L-shaped grooves 92 and 93 are formed on the inner periphery of the lock member 90 and the convex portions 82 and 83 are formed on the outer periphery of the sheath portion 80. May be configured to be fitted to the sheath 80 at the puncture position. Therefore, for example, as shown in FIG. 9, a female screw 97 is formed on the inner periphery of the lock member 90, and a male screw 84 corresponding to the female screw 97 is formed on the outer periphery of the sheath portion 80, thereby 80 and the lock member 90 may be fitted so as to be screwed together.

また、ロック部材９０の後部９０ａ内周には環状リブ９１を設けるようにしたが、これに限られるものではなく、全周のうち一部が切り欠かれた略環状のリブでもよく、また、例えばリブを三つ立設するものでもよい。すなわち、ロック部材９０の内周の一部が後部ストッパー７１と係合し、ロック部材９０の前方へのスライドが規制される構造であればよい。
同様に、鞘部８０の後部８０ａ内周には環状リブ８１を設けるようにしたが、これに限られるものではなく、全周のうち一部が切り欠かれた略環状のリブでもよく、また、例えばリブを三つ立設するものでもよい。すなわち、鞘部８０の内周の一部が前部ストッパー７２と係合し、鞘部８０の前後へのスライドが規制される構造であればよい。 Further, the annular rib 91 is provided on the inner periphery of the rear portion 90a of the lock member 90. However, the present invention is not limited to this, and may be a substantially annular rib in which a part of the entire periphery is cut out. For example, three ribs may be erected. That is, any structure may be used as long as a part of the inner periphery of the lock member 90 is engaged with the rear stopper 71 and the sliding of the lock member 90 forward is restricted.
Similarly, the annular rib 81 is provided on the inner periphery of the rear portion 80a of the sheath portion 80. However, the present invention is not limited to this, and a substantially annular rib in which a part of the entire periphery is cut off may be used. For example, three ribs may be erected. That is, it is only necessary that a part of the inner periphery of the sheath 80 is engaged with the front stopper 72 and the sliding of the sheath 80 to the front and rear is restricted.

また、鞘部８０の左右両側面に凸部８２，８３が形成されたとしたが、ロック部材９０と鞘部８０が係合されるならば、凸部８２，８３の数は限定されない。 Moreover, although the convex parts 82 and 83 were formed in the right and left both sides | surfaces of the sheath part 80, if the locking member 90 and the sheath part 80 are engaged, the number of the convex parts 82 and 83 will not be limited.

（第二実施形態）
次に図１０乃至図１６を参照して、本発明の第二実施形態に係る医療用針装置１１１を説明する。なお、第一実施形態と同一部分には同一符号を付した。 (Second embodiment)
Next, with reference to FIG. 10 thru | or FIG. 16, the medical needle apparatus 111 which concerns on 2nd embodiment of this invention is demonstrated. In addition, the same code | symbol was attached | subjected to the same part as 1st embodiment.

本実施形態の第一実施形態との主な違いはロック部材の形状であり、それに伴って、鞘部８０及び針基部７０の、ロック部材と係合する箇所の形状が第一実施形態とは異なる。以下、特に説明しない構成要素の部分に関しては、第一実施形態と同一である。 The main difference between this embodiment and the first embodiment is the shape of the lock member, and accordingly, the shape of the portion of the sheath portion 80 and the needle base portion 70 that engages with the lock member is different from the first embodiment. Different. Hereinafter, the components not specifically described are the same as those in the first embodiment.

針基部７０の後部ストッパー７１は、図１１に示すように、針基部７０の後部７０ａに形成された径を部分的に小さくした段差部７１であり、段差部７１の後方は、段差部７１の前方と同じ径の大きさとなっている。
また、針基部７０の後端７０ａは、チューブ４０が被嵌できるように段差部７１と同じ径として形成されている。 As shown in FIG. 11, the rear stopper 71 of the needle base 70 is a stepped portion 71 formed by partially reducing the diameter formed in the rear portion 70 a of the needle base 70. It has the same diameter as the front.
The rear end 70a of the needle base 70 is formed with the same diameter as the stepped portion 71 so that the tube 40 can be fitted.

鞘部８０は、図１３に示すように、後部８０ａ側面の対称な位置に二つの孔８５，８６が形成されている。なお、第一実施形態における鞘部８０に形成されていた凸８２，８３部は、本実施形態においては形成されない。 As shown in FIG. 13, the sheath portion 80 has two holes 85 and 86 formed at symmetrical positions on the side surface of the rear portion 80a. In addition, the convex part 82,83 part currently formed in the sheath part 80 in 1st embodiment is not formed in this embodiment.

ロック部材は、鞘部８０の後部８０ａに形成された孔８５に対して、鞘部８０の前後に垂直な方向に移動可能に挿入されるピン片１２０であり、図１２に示すように、鞘部８０の外径よりも大きい曲率半径の大円弧部１２１と、鞘部８０の外径よりも小さくかつ後部ストッパー７１の外径よりも大きい曲率半径の小円弧部１２２を有する。大円弧部１２１と小円弧部１２２は略ω字状に連結されている。
また、小円弧部１２２と連結していない大円弧部１２１の外側には、収納時に鞘部８０に当接して、後部ストッパー７１にピン片１２０の大円弧部１２１を位置合わせする矩形状の鍔部１２３が連結され、鍔部１２３のさらに外側には、鞘部８０に対してピン片１２０を移動させるときの持ち手になる把持部１２４が連結されている。 The lock member is a pin piece 120 that is inserted into a hole 85 formed in the rear portion 80a of the sheath portion 80 so as to be movable in a direction perpendicular to the front and rear of the sheath portion 80. As shown in FIG. A large arc portion 121 having a radius of curvature larger than the outer diameter of the portion 80 and a small arc portion 122 having a radius of curvature smaller than the outer diameter of the sheath portion 80 and larger than the outer diameter of the rear stopper 71 are provided. The large arc portion 121 and the small arc portion 122 are connected in a substantially ω shape.
Further, on the outside of the large arc portion 121 that is not connected to the small arc portion 122, a rectangular bowl that contacts the sheath portion 80 during storage and aligns the large arc portion 121 of the pin piece 120 with the rear stopper 71. The portion 123 is connected, and a grip portion 124 that is a handle when the pin piece 120 is moved with respect to the sheath portion 80 is connected to the outer side of the flange portion 123.

次に、以上のように構成された医療用針装置１１１の使用方法及び廃棄方法について説明する。
通常、図１０に示すように、鞘部８０の後部８０ａに形成された孔８５に挿入されたピン片１２０を移動して、ピン片１２０の小円弧部１２２に後部ストッパー７１たる段差部７１を位置合わせして嵌合し、注射針１１を突出させた穿刺位置にて、医療用針装置１１１は病院等に提供される。そのとき、注射針１１が露出していると危険であるので、注射針１１にはキャップ（図示しない）が嵌められている。
このように、ピン片１２０が段差部７１に係合してピン片１２０とともに鞘部８０の前方の移動を阻止することにより、注射針１１を突出した状態を確実に保持することができるので、安全に処置が行える。
なお、本実施形態に係る医療用針装置１１１における患者への穿刺から抜去は第一実施形態と同様である。 Next, a usage method and a disposal method of the medical needle device 111 configured as described above will be described.
Normally, as shown in FIG. 10, the pin piece 120 inserted in the hole 85 formed in the rear portion 80 a of the sheath portion 80 is moved, and the stepped portion 71 serving as the rear stopper 71 is moved to the small arc portion 122 of the pin piece 120. The medical needle device 111 is provided to a hospital or the like at the puncture position where the injection needle 11 is projected after being aligned and fitted. At this time, since it is dangerous if the injection needle 11 is exposed, a cap (not shown) is fitted to the injection needle 11.
Thus, the pin piece 120 engages with the stepped portion 71 to prevent the movement of the sheath portion 80 together with the pin piece 120, so that the protruding state of the injection needle 11 can be reliably held. Safe treatment is possible.
The removal from the puncture to the patient in the medical needle device 111 according to the present embodiment is the same as in the first embodiment.

次に、収納時には、鞘部８０に鍔部１２４を当接させて針基部７０の後部ストッパー７１にピン片１２０の大円弧部１２１を位置合わせすることより後部ストッパー７１との嵌合を解除し、その後、図１５に示すように、針基部７０に対して鞘部８０を前方に移動させる。
このときピン片１２０の小円弧部１２２側の先端は、鞘部８０の一方の孔８６から露出していて、鞘部８０の移動時、ピン片１２０は鞘部８０とともに移動する。
そして、第一実施形態と同様に鞘部８０に形成された係止部８１を針基部７０の前部ストッパー７２に係合させ、図１６に示すように、収納位置において鞘部８０内に注射針１１を収納した後、廃棄する。 Next, at the time of storing, the fitting with the rear stopper 71 is released by bringing the collar portion 124 into contact with the sheath portion 80 and aligning the large arc portion 121 of the pin piece 120 with the rear stopper 71 of the needle base 70. Then, as shown in FIG. 15, the sheath 80 is moved forward with respect to the needle base 70.
At this time, the tip of the pin piece 120 on the small arc portion 122 side is exposed from one hole 86 of the sheath portion 80, and the pin piece 120 moves together with the sheath portion 80 when the sheath portion 80 moves.
Then, as in the first embodiment, the locking portion 81 formed on the sheath portion 80 is engaged with the front stopper 72 of the needle base portion 70, and as shown in FIG. After the needle 11 is stored, it is discarded.

このような医療用針装置１１１によれば、穿刺位置において、ピン片１２０の小円弧部１２２は後部ストッパー７１に嵌合しているので、ピン片１２０の針基部７０に対する前後の移動が阻止される。そして、ピン片１２０は鞘部８０の後部８０ａに形成された孔８５に挿入されているので、針基部７０に対して鞘部８０の前後の移動が阻止される。したがって、注射針１１を突出した状態を確実に保持することができるので、安全に処置が行える。
また、鞘部８０にピン片１２０の鍔部１２４が当接するようにピン片１２０を移動させるだけで、鞘部８０と針基部７０との嵌合を解除することができるので、操作が容易である。 According to such a medical needle device 111, since the small arc portion 122 of the pin piece 120 is fitted to the rear stopper 71 at the puncture position, the front and back movement of the pin piece 120 relative to the needle base 70 is prevented. The And since the pin piece 120 is inserted in the hole 85 formed in the rear part 80a of the sheath part 80, the back-and-forth movement of the sheath part 80 with respect to the needle base part 70 is prevented. Therefore, since the state which protruded the injection needle 11 can be hold | maintained reliably, a treatment can be performed safely.
Further, since the fitting between the sheath portion 80 and the needle base portion 70 can be released simply by moving the pin piece 120 so that the collar portion 124 of the pin piece 120 contacts the sheath portion 80, the operation is easy. is there.

なお、第二実施形態において、ピン片１２０は、鍔部１２３と把持部１２４を有するものとしたが、これに限られるものではなく、後部ストッパー７１が形成された針基部７０と、大円弧部１２１及び小円弧部１２２の位置合わせが容易に行えるならば、鍔部１２３や把持部１２４はなくてもよい。
また、大円弧部１２１と小円弧部１２２の位置関係は、ピン片１２０を移動させることでピン片１２０と針基部７０との嵌合を解除できるならば、第二実施形態に示したようにピン片１２０の挿入方向に対して大円弧部１２１と小円弧部１２２を並設した位置関係に限定されるものではない。 In the second embodiment, the pin piece 120 has the flange portion 123 and the grip portion 124. However, the present invention is not limited to this, and the needle base portion 70 on which the rear stopper 71 is formed, and the large arc portion. If the positioning of 121 and the small circular arc part 122 can be easily performed, the collar part 123 and the grip part 124 may be omitted.
Further, the positional relationship between the large arc portion 121 and the small arc portion 122 is as shown in the second embodiment if the pin piece 120 and the needle base portion 70 can be released by moving the pin piece 120. It is not limited to the positional relationship in which the large arc portion 121 and the small arc portion 122 are arranged in parallel with respect to the insertion direction of the pin piece 120.

また、第一、第二実施形態において、針基部７０の前部ストッパー７２の前後に環状リブ７３，７４を形成したが、鞘部８０を針基部７０に対して前方に移動させる際に勢い余って鞘部８０が針基部７０から抜け落ちないように、しかも鞘部８０の内周に干渉しないように、前方の環状リブ７３の針基部７０外周からの突出量を大きく形成することが好ましい。 In the first and second embodiments, the annular ribs 73 and 74 are formed on the front and rear of the front stopper 72 of the needle base 70. However, when the sheath 80 is moved forward with respect to the needle base 70, there is a surplus momentum. Therefore, it is preferable that the protruding amount of the front annular rib 73 from the outer periphery of the needle base portion 70 is large so that the sheath portion 80 does not fall out of the needle base portion 70 and does not interfere with the inner periphery of the sheath portion 80.

１医療用針装置
１０針基部
１０ａ先端部
１０ｂ後端部
１０ｃ溝
１０ｄ凹部
１０ｅ凹部
１１注射針
２０鞘部
２１翼部
２２翼部
２３凸条
２４条溝
２５条溝
２６凸条
３０キャップ
４０チューブ
５０鞘部
５０ａ基端部
５０ｂ掛止突起
５１翼部
５２翼部
６１医療用針装置
７０針基部
７０ａ後部
７０ｂ前部
７１後部ストッパー（段差部）
７２前部ストッパー（段差部）
７３環状リブ
７４環状リブ
８０鞘部
８０ａ後部
８１係止部
８２凸部
８３凸部
８４雄ネジ
８５孔
８６孔
９０ロック部材
９０ａ後部
９１環状リブ
９２溝
９３溝
９４段
９５段
９６孔
９７雌ネジ
１１１医療用針装置
１２０ピン片
１２１大円弧部
１２２小円弧部
１２３鍔部
１２４把持部 DESCRIPTION OF SYMBOLS 1 Medical needle apparatus 10 Needle base part 10a Front-end | tip part 10b Rear end part 10c Groove 10d Concave part 10e Concave part 11 Injection needle 20 Sheath part 21 Wing part 22 Wing part 23 Convex strip 24 Convex 25 Convex 26 Convex 30 Cap 40 Tube 50 Sheath part 50a Base end part 50b Latching projection 51 Wing part 52 Wing part 61 Medical needle device 70 Needle base part 70a Rear part 70b Front part 71 Rear part stopper (step part)
72 Front stopper (step)
73 annular rib 74 annular rib 80 sheath 80a rear part 81 locking part 82 convex part 83 convex part 84 male screw 85 hole 86 hole 90 locking member 90a rear part 91 annular rib 92 groove 93 groove 94 step 95 step 96 hole 97 female screw 111 Medical needle device 120 Pin piece 121 Large arc part 122 Small arc part 123 Gutter part 124 Gripping part

Claims

A needle base with an injection needle attached to the tip and a tube fitted to the rear end;
The needle is externally inserted into the needle base so as to be slidable back and forth from a puncture position where the injection needle protrudes to a storage position where the injection needle is stored, and a pair of wings are coupled to the left and right side surfaces, and the needle is connected inward. A substantially cylindrical sheath that supports the base;
A medical needle device comprising a position restricting mechanism for positioning and fixing the sheath with respect to the needle base at the puncture position and the storage position,
The position restricting mechanism for the puncture position is formed in a separate lock member fitted in the rear portion of the sheath portion and a rear portion of the needle base portion, and engages with the lock member to move the lock member forward. Consisting of a rear stopper to block,
A position restricting mechanism for the storage position is formed at a locking portion formed at a rear portion of the sheath portion and a front portion of the needle base portion, and engages with the locking portion to move the sheath portion back and forth. A medical needle device comprising a blocking front stopper.

The rear stopper is a stepped portion in which the diameter formed at the rear portion of the needle base is partially reduced,
The locking member is a substantially cylindrical shape that is externally inserted into the needle base, and is coupled to the sheath at the puncture position, but is separated during the storage, and is engaged with the rear stopper at the inner periphery of the rear. The medical needle device according to claim 1, wherein an annular rib is provided.

A convex portion is formed on the outer periphery of the rear portion of the sheath portion, and a substantially L-shaped groove is formed on the inner periphery of the lock member. The medical needle device according to claim 1, wherein the medical needle device is provided.

The medical needle device according to claim 3, wherein a step of fixing a convex portion formed on the sheath portion is provided at a circumferential end of the substantially L-shaped groove.

The medical needle device according to claim 1 or 2, wherein the sheath portion and the lock member are fitted by being screwed together.

The rear stopper is a stepped portion in which the diameter formed at the rear portion of the needle base is partially reduced,
The lock member is inserted into a hole formed in the rear portion of the sheath portion so as to be movable in a direction perpendicular to the front and rear of the sheath portion, and a large arc portion having a curvature larger than the outer diameter of the sheath portion; A pin piece having a small arc part with a curvature smaller than the outer diameter of the sheath part and larger than the outer diameter of the rear stopper,
In the puncture position, the pin piece is moved so that the rear stopper is fitted to the small arc portion of the pin piece, and the large arc portion of the pin piece is aligned with the rear stopper during the storing, and the rear stopper The medical needle device according to claim 1, wherein the pin piece is moved so as to release the fitting.

The pin piece comes into contact with the sheath portion when the pin piece is moved with respect to the sheath portion, and the sheath portion during the storage, and the large arc portion of the pin piece is placed on the rear stopper. The medical needle device according to claim 6, further comprising a collar portion for alignment.

The front stopper is a stepped portion in which the diameter formed at the front portion of the needle base is partially reduced.
The locking portion formed in the sheath portion is an annular rib that is provided on the inner periphery of the rear portion of the sheath portion and engages with the front stopper. Medical needle device according to one of the above.