JP4410585B2

JP4410585B2 - Chemical injection device

Info

Publication number: JP4410585B2
Application number: JP2004064072A
Authority: JP
Inventors: 誠一小野
Original assignee: Kawasumi Laboratories Inc
Current assignee: Kawasumi Laboratories Inc
Priority date: 2004-03-08
Filing date: 2004-03-08
Publication date: 2010-02-03
Anticipated expiration: 2024-03-08
Also published as: JP2005245931A

Description

本発明は、ポートアクセスインフュージョンセット（ＰＯＲＴ
ＡＣＣＥＳＳＩＮＦＵＳＩＯＮＳＥＴ、ＰＡＩＳと称される、薬液注入装置ともいう）に使用される薬液注入装置の改良に関するもので、特に使用時の操作性や安全性を改良したものである。
The present invention relates to a port access infusion set (PORT).
The present invention relates to an improvement of a chemical solution injection device used in ACCESS INFUSION SET, also called PAIS (also referred to as a chemical solution injection device ), and is particularly improved in operability and safety during use.

図１１は、現在一般に使用されているＰＡＩＳ用薬液注入装置１５０の概略図である。薬液注入装置１５０は針基１５３の前方に略Ｌ字状の湾曲針１５２、側部に翼１５５を装着し、前記針基１５３の後方にチューブ１５６等を装着することにより構成されている。
湾曲針１５２は針基１５３に対して略９０度曲がった形状（略Ｌ字状）をしているので、湾曲針１５２先端に、力を集中しずらく、ポートに穿刺しずらいという課題がある。また略Ｌ字状の湾曲針１５２に合わせた針の誤刺防止用の機構（針カバー）を装着するのが難しいという課題があった。
出願人は特許文献１に、針の誤刺防止用の機構（針カバー）として、略Ｌ字型の針カバーを提案したが、略Ｌ字型であるが故に、重心が安定せず、チューブ上を移動させにくい、針に針カバーを被冠しずらいという課題があった。 FIG. 11 is a schematic view of a chemical injection device 150 for PAIS that is currently generally used. The chemical injection device 150 is configured by mounting a substantially L-shaped curved needle 152 in front of the needle base 153, a wing 155 on the side, and a tube 156 or the like behind the needle base 153.
Since the curved needle 152 has a shape (substantially L-shaped) bent by approximately 90 degrees with respect to the needle base 153, there is a problem that it is difficult to concentrate force on the distal end of the curved needle 152 and it is difficult to puncture the port. is there. In addition, there is a problem that it is difficult to mount a mechanism for preventing erroneous needle sticks (needle cover) aligned with the substantially L-shaped curved needle 152.
The applicant proposed in Patent Document 1 a substantially L-shaped needle cover as a mechanism (needle cover) for preventing needle punctures, but because it is substantially L-shaped, the center of gravity is not stable, and the tube There was a problem that it was difficult to move the needle cover, and it was difficult to cover the needle cover with the needle.

また特許文献２には、シースをボールハブに装着し、シースを任意の角度の曲げて患部に挿入できるようにしたカテーテルシースイントロデューサの発明が記載されている。
また特許文献３には、ストレートに形成された注射針をボールハブに装着し、注射針を任意の角度の曲げて患部に注射できるようにしたシリンジ（注射器）の発明が記載されている。
また特許文献４にはストレートに形成された注射針をヒンジハブに装着し、１８０°回動させて注射針を折りたためるようにしたシリンジ（注射器）の発明が記載されている。
しかしながら、これらの発明には、ＰＡＩＳ用の針（針基に対して略９０度曲がった形状）と前記指摘した課題、課題を解決するための手段については、何ら記載ないし示唆されていない。 Patent Document 2 describes an invention of a catheter sheath introducer in which a sheath is attached to a ball hub, and the sheath can be bent at an arbitrary angle and inserted into an affected part.
Patent Document 3 describes an invention of a syringe (syringe) in which an injection needle formed straight is attached to a ball hub, and the injection needle is bent at an arbitrary angle so that it can be injected into an affected area.
Patent Document 4 describes an invention of a syringe (syringe) in which a straight injection needle is attached to a hinge hub and rotated by 180 ° to fold the injection needle.
However, these inventions do not describe or suggest any PAIS needle (a shape bent by approximately 90 degrees with respect to the needle base), the above-mentioned problems, and means for solving the problems.

特開２００２−１８６６６８号公報（図１から１２）JP 2002-186668 A (FIGS. 1 to 12) アメリカ特許４８７４３７８（カテーテルシースイントロデューサ、ボールジョイント、図２参照）US Pat. No. 4,874,378 (catheter sheath introducer, ball joint, see FIG. 2) アメリカ特許５４０５３３０（シリンジニードルホルダー、ボールジョイント、図１、図２参照）US Patent 5405330 (Syringe needle holder, ball joint, see FIGS. 1 and 2) 特開２００３−２４５３５１号公報（注射器、ヒンジ、図１、図２参照）JP 2003-245351 A (syringe, hinge, see FIGS. 1 and 2)

本発明が解決しようとする問題点は、針をポートに穿刺しずらい、針カバーをチューブ上で移動させにくい、針に針カバーを被冠しずらい点である。 The problem to be solved by the present invention is that it is difficult to puncture the needle into the port, the needle cover is difficult to move on the tube, and the needle cover is difficult to cover the needle.

そこで本発明者は以上の課題を解決するために、鋭意検討を重ねた結果次の発明に到達した。
［１］本発明は、ハウジング（２）と、ボールハブ（５）と、ストッパー（６）とを有する医療用針（１）及び針カバー（１２）を有し、
前記ハウジング（２）は、筒状に形成され、
前記ハウジング（２）は、前方に切り欠き溝（３）を形成し、後方に前記針カバー（１２）を係止可能な突部（２Ｆ）を形成し、前方端部にボールハブ（５）を装着し、
前記ボールハブ（５）は、球状に形成され、前方から後方に亘って、中央に孔（５Ａ）が貫通して形成され、当該孔（５Ａ）の前方に前記針（１０）の後方が挿入され、
前記ストッパー（６）は、筒状に形成され、前方と後方にそれぞれ切り欠き溝（７、８）が形成され、
前記ストッパー（６）は、前記ボールハブ（５）を被冠するように装着されるとともに、前記ハウジング（２）の前方に装着され、
前記ボールハブ（５）は、前記ハウジング（２）と前記ストッパー（６）との間に遊嵌され、
前記針（１０）は前記ストッパー（６）を回動することにより、略水平位置から下方に略９０°の範囲で回動し、
前記針（１０）の後方にチューブ（１１）を装着し、当該チューブ（１１）は前記ストッパー（６）後方から、前記ハウジング（２）の内部空間（４）を経て、前記ハウジング（２）後方に延設され、
前記針カバー（１２）は、略筒状に形成され、前方と後方にそれぞれ開口部（１４、１５）が形成され、後方にはやや細径に絞られた後方壁面（１７）が形成され、
前記針カバー（１２）は、前記医療用針（１）を収納できる空間（１６）を有し、後方壁面（１７）を前記医療用針（１）のハウジング（２）の突部（２Ｆ）に係止できるように形成し、
前記針カバー（１２）の前記後方壁面（１７）の内径は、前記医療用針（１）のハウジング（２）の突部（２Ｆ）を形成した付近の外径よりも若干小さく形成され、
前記針カバー（１２）を前記針（１０）の前方方向にスライドさせて被冠する際に、前記壁面（１７）は前記突部（２Ｆ）を乗り越えて、前記突部（２Ｆ）と相互に係止され、前記壁面（１７）が前記ハウジング（２）外周に固定され、
このため前記針カバー（１２）は前記針（１０）と反対方向に移動することがなく、前記針（１０）が前記針カバー（１２）から外に露出することがないように形成した薬液注入装置（１Ａ）を提供する。
［２］本発明は、ハウジング（２２）と、ボールハブ（２５）と、ストッパー（２６）とを有する医療用針（２１）及び針カバー（１２）を有し、
前記ハウジング（２２）は、筒状に形成され、
前記ハウジング（２２）は、前方に液体を流通させるための孔（２２Ａ）を形成し、後方に前記針カバー（１２）を係止可能な突部（２２Ｆ）を形成し、前方端部にボールハブ（２５）を装着し、
前記ボールハブ（２５）は、球状に形成され、前方から中央に亘って、第一の孔（２５Ａ）が形成され、当該第一の孔（２５Ａ）から所定の角度で、前記中央から後方に亘って第二の孔（２５Ｂ）が貫通して形成され、前記第一の孔（２５Ａ）に針（３０）の後方が挿入され、
前記第二の孔（２５Ｂ）は、前記ハウジング（２２）の液体を流通させるための孔（２２Ａ）と連通できるように形成し、
前記ストッパー（２６）は、筒状に形成され、前方に切り欠き溝（２７）が形成され、
前記ストッパー（２６）は、前記ボールハブ（２５）を被冠するように装着されるとともに、前記ハウジング（２２）の前方に装着され、
前記ボールハブ（２５）は、前記ハウジング（２２）と前記ストッパー（２６）との間に遊嵌され、
前記針（３０）は前記ストッパー（２６）を回動することにより、略水平位置から下方に略９０°の範囲で回動し、
前記ハウジング（２２）の後方より、当該ハウジング（２２）の内部空間（２４）に至るまで、チューブ（３１）の先端を延設して装着し、
前記針カバー（１２）は、略筒状に形成され、前方と後方にそれぞれ開口部（１４、１５）が形成され、後方にはやや細径に絞られた壁面（１７）が形成され、
前記針カバー（１２）は、前記医療用針（２１）を収納できる空間（１６）を有し、後方壁面（１７）を前記医療用針（２１）のハウジング（２２）の突部（２Ｆ）に係止できるように形成し、
前記針カバー（１２）の前記壁面（１７）の内径は、前記医療用針（２１）のハウジング（２２）の突部（２Ｆ）を形成した付近の外径よりも若干小さく形成され、
前記針カバー（１２）を、前記針（３０）の前方方向にスライドさせて被冠する際に、前記壁面（１７）は前記突部（２Ｆ）を乗り越えて、前記突部（２Ｆ）と相互に係止され、前記壁面（１７）が前記ハウジング（２）外周に固定され、
このため前記針カバー（１２）は前記針（３０）前方と反対方向に移動することがなく、前記針（３０）が前記針カバー（１２）から露出することがないように形成した薬液注入装置（２１Ａ）を提供する。
［３］本発明は、ハウジング（４２）と、ヒンジハブ（４５）と、ストッパー（４６）と、針カバー（１２）とを有し、
前記ハウジング（４２）は、筒状に形成され、
前記ハウジング（４２）は、前方に切り欠き溝（４３）を形成し、後方に、前記針カバー（１２）を係止可能な突部（４２Ｆ）を形成し、前方端部にヒンジハブ（４５）を装着し、
前記ヒンジハブ（４５）は、筒状に形成され、前記ヒンジハブ（４５）は、外壁部に突部（４５Ａ）を形成し、当該突部４５Ａを、前記ストッパー（４６）の溝（４６Ａ）に遊嵌し、
前方から後方に亘って、中央に孔（４５Ａ１）が貫通して形成され、当該孔（４５Ａ１）の前方に前記針（１０）の後方が挿入され、
前記ストッパー（４６）は、筒状に形成され、前方と後方にそれぞれ切り欠き溝（４７、４８）が形成され、
前記ストッパー（４６）は、内壁部に前記ヒンジハブ（４５）の突部（４５Ａ）を遊嵌する溝（４６Ａ）を形成し、当該ヒンジハブ（４５）を被冠するように装着されるとともに、前記ハウジング（４２）の前方に装着され、
前記ヒンジハブ（４５）は、前記ハウジング（４２）と前記ストッパー（４６）との間に遊嵌され、
前記針（５０）は前記ストッパー（４６）を回動することにより、略水平位置から下方に略９０°の範囲で回動し、
前記針（５０）の後方にチューブ（５１）を装着し、当該チューブ（５１）は前記ストッパー（４６）後方から、前記ハウジング（４２）の内部空間（４４）を経て、前記ハウジング（４２）後方に延設され、
前記針カバー（１２）は、略筒状に形成され、前方と後方にそれぞれ開口部（１４、１５）が形成され、後方にはやや細径に絞られた壁面（１７）が形成され、
前記針カバー（１２）は、前記医療用針（４１）を収納できる空間（１６）を有し、後方壁面（１７）を前記医療用針（４１）のハウジング（４２）の突部（２Ｆ）に係止できるように形成し、
前記針カバー（１２）の前記壁面（１７）の内径は、前記医療用針（１）のハウジング（４２）の突部（４２Ｆ）を形成した付近の外径よりも若干小さく形成され、
前記針カバー（１２）を前記針（５０）前方方向にスライドさせて被冠する際に、前記壁面（１７）は前記突部（４２Ｆ）を乗り越えて、前記突部（４２Ｆ）と相互に係止され、前記壁面（１７）が前記ハウジング（４２）外周に固定され、
このため前記針カバー（１２）は前記針（５０）前方と反対方向に移動することがなく、前記針（５０）が前記針カバー（１２）から露出することがないように形成した薬液注入装置（４１Ａ）を提供する。
Therefore, as a result of intensive studies to solve the above problems, the present inventor has reached the following invention.
[1] The present invention has a medical needle (1) and a needle cover (12) having a housing (2), a ball hub (5), and a stopper (6),
The housing (2) is formed in a cylindrical shape,
The housing (2) has a notch (3) formed in the front, a protrusion (2F) capable of locking the needle cover (12) in the rear, and a ball hub (5) in the front end. Wearing,
The ball hub (5) is formed in a spherical shape, a hole (5A) is formed through the center from the front to the rear, and the rear of the needle (10) is inserted in front of the hole (5A). ,
The stopper (6) is formed in a cylindrical shape, and notched grooves (7, 8) are formed in the front and rear, respectively.
The stopper (6) is mounted so as to cover the ball hub (5) and is mounted in front of the housing (2),
The ball hub (5) is loosely fitted between the housing (2) and the stopper (6),
The needle (10) is rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper (6),
A tube (11) is attached to the rear of the needle (10), and the tube (11) passes from the rear of the stopper (6) through the internal space (4) of the housing (2) to the rear of the housing (2). Extended to
The needle cover (12) is formed in a substantially cylindrical shape, with openings (14, 15) formed at the front and rear, respectively, and a rear wall surface (17) slightly narrowed at the rear.
The needle cover (12) has a space (16) in which the medical needle (1) can be accommodated, and the rear wall surface (17) is a protrusion (2F) of the housing (2) of the medical needle (1). Formed so that it can be locked to
An inner diameter of the rear wall surface (17) of the needle cover (12) is slightly smaller than an outer diameter in the vicinity of the protrusion (2F) of the housing (2) of the medical needle (1),
When the needle cover (12) is slid in the forward direction of the needle (10) to be crowned, the wall surface (17) gets over the protrusion (2F) and is mutually connected to the protrusion (2F). And the wall surface (17) is fixed to the outer periphery of the housing (2),
For this reason, the needle cover (12) does not move in the opposite direction to the needle (10), and the chemical solution injection formed so that the needle (10) is not exposed to the outside from the needle cover (12). An apparatus (1A) is provided.
[2] The present invention includes a medical needle (21) and a needle cover (12) having a housing (22), a ball hub (25), and a stopper (26),
The housing (22) is formed in a cylindrical shape,
The housing (22) has a hole (22A) for allowing liquid to flow forward, a protrusion (22F) capable of locking the needle cover (12) at the rear, and a ball hub at the front end. (25)
The ball hub (25) is formed in a spherical shape, and a first hole (25A) is formed from the front to the center, and extends from the center to the rear at a predetermined angle from the first hole (25A). A second hole (25B) is formed therethrough, the back of the needle (30) is inserted into the first hole (25A),
The second hole (25B) is formed so as to communicate with the hole (22A) for allowing the liquid in the housing (22) to flow therethrough,
The stopper (26) is formed in a cylindrical shape, and a notch groove (27) is formed in the front,
The stopper (26) is mounted so as to cover the ball hub (25) and is mounted in front of the housing (22),
The ball hub (25) is loosely fitted between the housing (22) and the stopper (26),
The needle (30) is rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper (26),
From the rear of the housing (22) to the internal space (24) of the housing (22), the tip of the tube (31) is extended and attached,
The needle cover (12) is formed in a substantially cylindrical shape, with openings (14, 15) formed at the front and rear, respectively, and a wall (17) with a slightly narrow diameter formed at the rear,
The needle cover (12) has a space (16) in which the medical needle (21) can be accommodated, and the rear wall surface (17) is a protrusion (2F) of the housing (22) of the medical needle (21). Formed so that it can be locked to
The inner diameter of the wall surface (17) of the needle cover (12) is formed slightly smaller than the outer diameter in the vicinity of the protrusion (2F) of the housing (22) of the medical needle (21),
When the needle cover (12) is slid in the forward direction of the needle (30) to be crowned, the wall surface (17) gets over the protrusion (2F) and is in mutual contact with the protrusion (2F). The wall surface (17) is fixed to the outer periphery of the housing (2),
For this reason, the needle cover (12) does not move in the direction opposite to the front of the needle (30), and the liquid injector is formed so that the needle (30) is not exposed from the needle cover (12). (21A) is provided.
[3] The present invention includes a housing (42), a hinge hub (45), a stopper (46), and a needle cover (12),
The housing (42) is formed in a cylindrical shape,
The housing (42) has a notch (43) formed in the front, a protrusion (42F) capable of locking the needle cover (12) in the rear, and a hinge hub (45) in the front end. Wearing
The hinge hub (45) is formed in a cylindrical shape, and the hinge hub (45) forms a protrusion (45A) on the outer wall portion, and the protrusion 45A is allowed to play in the groove (46A) of the stopper (46). Fit,
A hole (45A1) is formed through the center from the front to the rear, and the back of the needle (10) is inserted in front of the hole (45A1).
The stopper (46) is formed in a cylindrical shape, and notched grooves (47, 48) are formed in the front and rear, respectively.
The stopper (46) has a groove (46A) for loosely fitting the protrusion (45A) of the hinge hub (45) on the inner wall, and is mounted so as to cover the hinge hub (45). Mounted in front of the housing (42);
The hinge hub (45) is loosely fitted between the housing (42) and the stopper (46),
The needle (50) is rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper (46),
A tube (51) is attached to the back of the needle (50), and the tube (51) passes from the back of the stopper (46) through the internal space (44) of the housing (42) to the back of the housing (42). Extended to
The needle cover (12) is formed in a substantially cylindrical shape, with openings (14, 15) formed at the front and rear, respectively, and a wall (17) with a slightly narrow diameter formed at the rear,
The needle cover (12) has a space (16) in which the medical needle (41) can be accommodated, and a rear wall surface (17) is provided on the protrusion (2F) of the housing (42) of the medical needle (41). Formed so that it can be locked to
The inner diameter of the wall surface (17) of the needle cover (12) is formed slightly smaller than the outer diameter in the vicinity of the protrusion (42F) of the housing (42) of the medical needle (1),
When the needle cover (12) is slid in the forward direction of the needle (50) to be crowned, the wall surface (17) gets over the protrusion (42F) and interacts with the protrusion (42F). And the wall surface (17) is fixed to the outer periphery of the housing (42),
For this reason, the needle cover (12) does not move in the direction opposite to the front of the needle (50), and the chemical injection device is formed so that the needle (50) is not exposed from the needle cover (12). (41A) is provided.

（１）針１０をハウジング２に対して水平にした状態で、ポート（図示せず）に穿刺できるので、ポートに穿刺するのが容易である。
（２）針１０をハウジング２に対して水平の状態にすることができ、略Ｌ字状でない、単純な略筒状の針カバー１２を装着できるので、チューブ上を移動させるのが容易で、針１０に針カバー１２を被冠するのが容易である。 (1) Since the port (not shown) can be punctured while the needle 10 is horizontal with respect to the housing 2, it is easy to puncture the port.
(2) Since the needle 10 can be in a horizontal state with respect to the housing 2 and a simple substantially cylindrical needle cover 12 that is not substantially L-shaped can be attached, it is easy to move on the tube, It is easy to put the needle cover 12 on the needle 10.

［医療用針１］
図１は本発明の薬液注入装置１Ａを構成する医療用針１の概略図［（Ａ）針１０をハウジング２に対して略９０°下方に回動したとき、（Ｂ）針１０をハウジング２に対して略４５°下方に回動したとき、（Ｃ）針１０をハウジング２に対して水平にしたとき］、図２は針１０に針カバー１２を被冠するときの概略図［（Ａ）は被冠する前、（Ｂ）は被冠する途中、（Ｃ）は被冠後］、図３は図１の断面図［（Ａ）、（Ｂ）、（Ｃ）はそれぞれ図１（Ａ）、（Ｂ）、（Ｃ）に対応する］、図４は図１の断面図と側面図［（Ａ）は図１（Ｃ）の中央縦断面図、（Ｂ）は図１（Ｃ）の中央横断面図（上から見た図面）、（Ｃ）は同中央横断面図（下から見た図面）、（Ｄ）は図１（Ｃ）の左側面図、（Ｅ）は図１（Ｃ）の右側面図］、図５は針１０に針カバー１２を被冠するときの断面図［（Ａ）は被冠する前、（Ｂ）は被冠する途中、（Ｃ）は被冠後、（Ｄ）は（Ｃ）の一部拡大図］である。
医療用針１は図１から図５に例示するように、ハウジング２の前方に、針１０を植設したボールハブ５を配置し、ボールハブ５にはストッパー６を被冠している。ボールハブ５はハウジング２とストッパー６の間に遊嵌され、これにより針１０はストッパー６を回動することにより、略水平位置から下方に略９０°の範囲で回動することができる。
さらに針１０後方にチューブ１１を装着し、チューブ１１はストッパー６後方から、ハウジング２の内部空間４を経て、ハウジング２後方に延設されている。
[Medical needle 1]
FIG. 1 is a schematic view of a medical needle 1 constituting a medicinal-solution injection device 1A of the present invention [(A) When the needle 10 is rotated approximately 90 ° downward with respect to the housing 2, (B) the needle 10 is moved to the housing 2; When the needle 10 is turned horizontally with respect to the housing 2], FIG. 2 is a schematic diagram when the needle cover 12 is put on the needle 10 [(A). ) Is before crowning, (B) is during crowning, (C) is after crowning], FIG. 3 is a cross-sectional view of FIG. 1 [(A), (B), (C) is FIG. 4 corresponds to A), (B), and (C)], FIG. 4 is a sectional view and a side view of FIG. 1 [(A) is a central longitudinal sectional view of FIG. 1 (C), and (B) is FIG. ) Central cross-sectional view (drawing from above), (C) is the central cross-sectional view (viewing from below), (D) is the left side view of FIG. 1 (C), (E) is the figure 1 (C) right side view], FIG. Sectional view when the needle cover 12 is crowned [(A) is before crowning, (B) is during crowning, (C) is after crowning, (D) is a partially enlarged view of (C)] Figure].
As illustrated in FIGS. 1 to 5, the medical needle 1 has a ball hub 5 in which a needle 10 is implanted in front of a housing 2, and the ball hub 5 is covered with a stopper 6. The ball hub 5 is loosely fitted between the housing 2 and the stopper 6, whereby the needle 10 can be rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper 6.
Further, a tube 11 is attached to the back of the needle 10, and the tube 11 extends from the back of the stopper 6 to the back of the housing 2 through the internal space 4 of the housing 2.

［ハウジング２］
ハウジング２は、図１から図５に例示するように、（ストッパー６と比較して細径の）筒状に形成され、略前方（厳密にいえば前方上部）に切り欠き溝３（以下、単に溝３）が形成されている。ハウジング２の後方に針カバー１２を係止可能な突部２Ｆ（フックまたは係止部ともいう）を形成している。
［ボールハブ５］
ボールハブ５は、図１から図５に例示するように、球状に形成され、前方から後方に亘って、中央に孔５Ａが貫通して形成されている。当該孔５Ａに針１０が植設されている。さらに詳述すれば針１０の後端が孔５Ａ挿入（植設ともいう）される。
［ストッパー６］
ストッパー６は図１から図５に例示するように、（ハウジング２と比較して大径の）筒状に形成され、略前方（厳密にいえば前方下部）と略後方（厳密にいえば後上部）にそれぞれ切り欠き溝７、８（以下、単に溝７、８という）が形成されている。ストッパー６は、ボールハブ５とハウジング２前方に装着（被冠）される。
［溝３、溝７、８］
ハウジング２とストッパー６に、前記のように溝３、溝７、８を形成したのは、医療用針１を図１（Ａ）、（Ｂ）のように使用するときに、チューブ１１の逃げ場を確保するためである。さらに詳述すれば、ハウジング２の内部空間４内に配置されたチューブ１１が折れ曲がらないように、ハウジング２外に露出することができるようにするためである。
［針カバー１２］
前記医療用針１に装着されたチューブ１１の途中に、スライド可能な針カバー１２を装着している。
当該針カバー１２は、前記医療用針１を収納できる空間１６を有し、後方壁面１７を医療用針のハウジング２の突部２Ｆに係止できるように形成している。
さらに詳述すれば、針カバー１２は略筒状（円、楕円、角形等何でも良い）に形成され、前方と後方にそれぞれ開口部１４、１５が形成され、前方には鍔１３、後方にはやや細径に絞られた壁面１７が形成されている。
壁面１７内径は、ハウジング２の突部２Ｆ付近の外径よりも若干小さく形成されているので、針カバー１２を医療用針１方向にスライドさせて被冠すると、壁面１７は突部２Ｆを乗り越えて、突部２Ｆと相互に係止され、壁面１７がハウジング外周に固定される。このため針カバー１２は医療用針１と反対方向に移動することがなく、医療用針１が針カバー１２から抜け出すことがない（針１０は針カバー１２の外に露出しない）。以上のように突部２Ｆはワンウェイフックとしての役割を果たす。 [Housing 2]
As illustrated in FIGS. 1 to 5, the housing 2 is formed in a cylindrical shape (having a smaller diameter than the stopper 6), and has a notch groove 3 (hereinafter referred to as “front upper portion”). A groove 3) is simply formed. A protrusion 2F (also referred to as a hook or a locking portion) capable of locking the needle cover 12 is formed at the rear of the housing 2.
[Ball hub 5]
As illustrated in FIGS. 1 to 5, the ball hub 5 is formed in a spherical shape, and a hole 5 </ b> A is formed through the center from the front to the rear. A needle 10 is implanted in the hole 5A. More specifically, the rear end of the needle 10 is inserted into the hole 5A (also referred to as planting).
[Stopper 6]
As illustrated in FIGS. 1 to 5, the stopper 6 is formed in a cylindrical shape (having a larger diameter than the housing 2), and is substantially forward (strictly speaking, the lower front) and substantially backward (strictly speaking, the rear). Notch grooves 7 and 8 (hereinafter simply referred to as grooves 7 and 8) are formed in the upper part, respectively. The stopper 6 is mounted (crowned) in front of the ball hub 5 and the housing 2.
[Groove 3, Groove 7, 8]
The grooves 3 and 7 and 8 are formed in the housing 2 and the stopper 6 as described above, when the medical needle 1 is used as shown in FIGS. 1 (A) and 1 (B). This is to ensure More specifically, the tube 11 disposed in the inner space 4 of the housing 2 can be exposed outside the housing 2 so as not to be bent.
[Needle cover 12]
A slidable needle cover 12 is attached in the middle of the tube 11 attached to the medical needle 1.
The needle cover 12 has a space 16 in which the medical needle 1 can be accommodated, and is formed so that the rear wall surface 17 can be locked to the protrusion 2F of the housing 2 of the medical needle.
More specifically, the needle cover 12 is formed in a substantially cylindrical shape (anything such as a circle, an ellipse, a square, etc.) is formed, and openings 14 and 15 are formed in the front and rear, respectively. A wall surface 17 slightly narrowed is formed.
Since the inner diameter of the wall surface 17 is slightly smaller than the outer diameter in the vicinity of the protrusion 2F of the housing 2, when the needle cover 12 is slid toward the medical needle 1 and covered, the wall surface 17 gets over the protrusion 2F. Thus, the wall surface 17 is fixed to the outer periphery of the housing. Therefore, the needle cover 12 does not move in the opposite direction to the medical needle 1, and the medical needle 1 does not come out of the needle cover 12 (the needle 10 is not exposed outside the needle cover 12). As described above, the protrusion 2F serves as a one-way hook.

［医療用針１（ハウジング２、ボールハブ５及びストッパー６）の構成材料］
ハウジング２とストッパー６は相互に溶剤接着できる硬質合成樹脂より形成され、ボールハブ５は、ハウジング２及びストッパー６との接触面が摺動可能な摩擦抵抗の低い（潤滑性を有する）硬質合成樹脂、金属等により形成される。
［医療用針１（針１０、ハウジング２、ボールハブ５及びストッパー６）の組み立て］
次に本発明の医療用針１の組み立て方法の一例について説明する。
（１）針１０の後端を挿入（植設ともいう）したボールハブ５をハウジング２の前方に配置し、ボールハブ５とハウジング２前方にストッパー６を被嵌する。
（２）ハウジング２後方から空間４内にチューブ１１先端を挿入し、針１０の後端にチューブ１１先端を装着する。 [Constituent materials of medical needle 1 (housing 2, ball hub 5 and stopper 6)]
The housing 2 and the stopper 6 are formed of a hard synthetic resin that can be solvent-bonded to each other, and the ball hub 5 is a hard synthetic resin having a low frictional resistance (having lubricity) that allows the contact surface between the housing 2 and the stopper 6 to slide. It is made of metal or the like.
[Assembly of medical needle 1 (needle 10, housing 2, ball hub 5 and stopper 6)]
Next, an example of a method for assembling the medical needle 1 of the present invention will be described.
(1) The ball hub 5 into which the rear end of the needle 10 is inserted (also referred to as implantation) is disposed in front of the housing 2, and the stopper 6 is fitted on the ball hub 5 and the housing 2 in front.
(2) Insert the distal end of the tube 11 into the space 4 from the rear of the housing 2 and attach the distal end of the tube 11 to the rear end of the needle 10.

［薬液注入装置１Ａの使用方法］
次に本発明の薬液注入装置１Ａの使用方法の一例について説明する。
（１）図１（Ｃ）（針１０をハウジング２に対して水平）の状態で、針１０をポート（図示せず）に穿刺して、（Ｂ）（針１０をハウジング２に対して略４５°下方に回動）を経て、（Ａ）（針１０をハウジング２に対して略９０°下方に回動）の状態にして、薬液等の注入を行う。
また「（１）´図１（Ｃ）（針１０をハウジング２に対して水平）から（Ｂ）（針１０をハウジング２に対して略４５°下方に回動）を経て（Ａ）（針１０をハウジング２に対して略９０°下方に回動）のようにして、針１０をポート（図示せず）に穿刺して、薬液等の注入を行う。」のように使用することもできる。
（２）薬液等の注入が終了した後、針１０をポート（図示せず）から抜く前に、図１（Ａ）（針１０をハウジング２に対して略９０°下方に回動）の状態から、（Ｂ）（針１０をハウジング２に対して略４５°下方に回動）を経て、図１（Ｃ）（針１０をハウジング２に対して水平）の状態に戻す。
（３）図２（Ａ）から（Ｂ）のように、針カバー１２を針１０方向に移動させ、針１０を針カバー１２に被冠しながら、図２（Ｃ）のように針１０を完全に針カバー１２で被冠して廃棄する。これにより、針１０をポート（図示せず）から抜いた直後から廃棄するまでに、作業者の誤刺事故を防止することができる。
[Usage of chemical injection device 1A ]
Next, an example of a method for using the chemical injection device 1A of the present invention will be described.
(1) In the state shown in FIG. 1C (the needle 10 is horizontal with respect to the housing 2), the needle 10 is punctured into a port (not shown), and (B) (the needle 10 is substantially omitted from the housing 2). After 45 degrees of rotation), (A) (the needle 10 is rotated approximately 90 degrees downward with respect to the housing 2) is brought into a state of injecting a chemical solution or the like.
1 (C) (FIG. 1 (C) (the needle 10 is horizontal with respect to the housing 2) to (B) (the needle 10 is rotated approximately 45 ° downward with respect to the housing 2). The needle 10 is punctured into a port (not shown) to inject a drug solution or the like. .
(2) After the injection of the chemical solution or the like is completed, before the needle 10 is removed from the port (not shown), the state shown in FIG. 1A (the needle 10 is rotated approximately 90 ° downward with respect to the housing 2) From (B) (the needle 10 is rotated approximately 45 ° downward with respect to the housing 2), the state is returned to the state shown in FIG. 1C (the needle 10 is horizontal with respect to the housing 2).
(3) As shown in FIGS. 2 (A) to 2 (B), the needle cover 12 is moved in the direction of the needle 10 and the needle 10 is put on the needle cover 12 while the needle 10 is moved as shown in FIG. Completely covered with the needle cover 12 and discarded. Thereby, it is possible to prevent the operator from accidental puncture accidents immediately after the needle 10 is pulled out from the port (not shown) until it is discarded.

図６は本発明の薬液注入装置２１Ａを構成する医療用針２１の断面図［（Ａ）針３０をハウジング２２に対して略９０°下方に回動したとき、（Ｂ）針３０をハウジング２２に対して略４５°下方に回動したとき、（Ｃ）針３０をハウジング２２に対して水平にしたとき］、図７は医療用針２１の断面図と側面図［（Ａ）は図６（Ｃ）と同じ断面図、（Ｂ）は（Ａ）の横中央断面図（上から見た図面）、（Ｃ）は同横中央断面図（下から見た図面）、（Ｄ）は図６（Ｃ）の左側面図、（Ｅ）は図６（Ｃ）の右側面図］である。
医療用針２１は図６から図７に例示するように、ハウジング２２の前方に、針３０を植設したボールハブ２５を配置し、当該ボールハブ２５にストッパー２６を被冠している。ボールハブ２５は前記ハウジング２２とストッパー２６の間に遊嵌され、針３０はストッパー２６を回動することにより、略水平位置から下方に略９０°の範囲で回動することができる。
ハウジング２２の内部空間２４内にチューブ３１先端を装着し、当該チューブ３１はハウジング２２内部空間２４を経て、ハウジング２２後方に延設されている。ハウジング２２とストッパー２６は液密に接合されている。
6 is a cross-sectional view of the medical needle 21 constituting the medicinal-solution injection device 21A of the present invention [(A) when the needle 30 is rotated approximately 90 ° downward with respect to the housing 22, (B) the needle 30 is moved to the housing 22; 7C, when the needle 30 is horizontal with respect to the housing 22, FIG. 7 is a cross-sectional view and a side view of the medical needle 21 [FIG. (C) is the same cross-sectional view, (B) is a horizontal central cross-sectional view of (A) (viewed from above), (C) is the horizontal central cross-sectional view (drawn from below), (D) is a figure 6 (C) is a left side view, and FIG. 6 (E) is a right side view of FIG. 6 (C).
As illustrated in FIGS. 6 to 7, the medical needle 21 includes a ball hub 25 in which a needle 30 is implanted in front of a housing 22, and the ball hub 25 is covered with a stopper 26. The ball hub 25 is loosely fitted between the housing 22 and the stopper 26, and the needle 30 can be rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper 26.
The distal end of the tube 31 is mounted in the internal space 24 of the housing 22, and the tube 31 extends to the rear of the housing 22 via the housing 22 internal space 24. The housing 22 and the stopper 26 are joined in a liquid-tight manner.

［ハウジング２２］
ハウジング２２は、図６から図７に例示するように、図１から図５に例示したハウジング２と同様に形成され、前方に液体（薬液）流通のための孔２２Ａを形成し、溝３を形成していない点でハウジング２と異なる。またハウジング２２では、内部空間２４にチューブ３１先端が装着される。
［ボールハブ２５］
ボールハブ２５は、図６から図７に例示するように、図１から図５に例示したボールハブ５と同様に形成され、前方から中央に亘って第一の孔２５Ａが形成され、第一の孔２５Ａから所定の角度をつけて、中央から後方に亘って第二の孔２５Ｂが貫通して形成されている点でボールハブ５と異なる。すなわち第一の孔２５Ａに針３０が植設され（さらに詳述すれば針３０の後端が孔２５Ａ挿入（植設ともいう）される）、第二の孔２５Ｂは、液体（薬液）の流通路となる。
［ストッパー２６］
ストッパー２６は図６から図７に例示するように、図１から図５に例示したストッパー６と同様に形成される。ストッパー２６はストッパー６のように溝８は形成していないが、ストッパー６と同様に、溝２７は形成している。ストッパー２６は、ボールハブ２５とハウジング２２前方に液密に装着（被冠）される。
なおハウジング２２及びストッパー２６の構成材料は、硬質合成樹脂も使用可能であるが、ボールハブ２５と液密性を持たせるためエラストマー樹脂のほうがより好ましい。
［医療用針２１の使用方法］
図６（Ａ）（針３０をハウジング２２に対して略９０°下方に回動したとき）の状態では、針３０内部、孔２５Ｂ、孔２２Ａ、内部空間２４及びチューブ３１が連通し、チューブ３１より針３０を経て、薬液の注入が可能である。
図６（Ｃ）（針３０をハウジング２２に対して水平にしたとき）の状態では、孔２５Ｂが、ハウジング２２の前方壁面に塞がれて、薬液の注入ができない。
その他の形状、材料、使用方法は図１から図５に例示した医療用針１と実質的に同じであるから詳細な説明は省略する。 [Housing 22]
As illustrated in FIGS. 6 to 7, the housing 22 is formed in the same manner as the housing 2 illustrated in FIGS. 1 to 5, and a hole 22A for fluid (chemical solution) is formed in the front, and the groove 3 is formed. It differs from the housing 2 in that it is not formed. In the housing 22, the tip of the tube 31 is mounted in the internal space 24.
[Ball hub 25]
As illustrated in FIGS. 6 to 7, the ball hub 25 is formed in the same manner as the ball hub 5 illustrated in FIGS. 1 to 5, and a first hole 25A is formed from the front to the center. The ball hub 5 is different from the ball hub 5 in that a second hole 25B is formed penetrating from the center to the rear at a predetermined angle from 25A. That is, the needle 30 is implanted in the first hole 25A (more specifically, the rear end of the needle 30 is inserted into the hole 25A (also referred to as implantation)), and the second hole 25B is formed of a liquid (chemical solution). It becomes a flow passage.
[Stopper 26]
As illustrated in FIGS. 6 to 7, the stopper 26 is formed in the same manner as the stopper 6 illustrated in FIGS. 1 to 5. The stopper 26 is not formed with the groove 8 unlike the stopper 6, but the groove 27 is formed like the stopper 6. The stopper 26 is liquid-tightly mounted (crowned) in front of the ball hub 25 and the housing 22.
In addition, although hard synthetic resin can also be used for the constituent material of the housing 22 and the stopper 26, an elastomer resin is more preferable in order to have liquid-tightness with the ball hub 25.
[How to use the medical needle 21]
In the state of FIG. 6A (when the needle 30 is rotated approximately 90 ° downward with respect to the housing 22), the inside of the needle 30, the hole 25B, the hole 22A, the internal space 24, and the tube 31 communicate with each other. Further, it is possible to inject a chemical solution through the needle 30.
In the state of FIG. 6C (when the needle 30 is made horizontal with respect to the housing 22), the hole 25B is blocked by the front wall surface of the housing 22, and the chemical solution cannot be injected.
Since other shapes, materials, and methods of use are substantially the same as those of the medical needle 1 illustrated in FIGS. 1 to 5, a detailed description thereof will be omitted.

図８は本発明の薬液注入装置４１Ａを構成する医療用針４１の概略図［（Ａ）針５０をハウジング４２に対して略９０°下方に回動したとき、（Ｂ）針５０をハウジング４２に対して略４５°下方に回動したとき、（Ｃ）針５０をハウジング４２に対して水平にしたとき］、図９は図８の断面図［（Ａ）、（Ｂ）、（Ｃ）は図８の（Ａ）、（Ｂ）、（Ｃ）に対応する］、図１０は図８の断面図と側面図［（Ａ）は図８（Ｃ）の縦中央断面図、（Ｂ）は図８（Ｃ）の横中央断面図（上から見た図面）、（Ｃ）は同横中央断面図（下から見た図面）、（Ｄ）は図８（Ｃ）の左側面図、（Ｅ）は図８（Ｃ）の右側面図］である。
医療用針４１は図８から図１０に例示するように、ハウジング４２の前方に、針５０を植設したヒンジハブ４５を配置し、当該ヒンジハブ４５にストッパー４６を被冠している。ヒンジハブ４５は前記ストッパー４６に遊嵌され、針５０はストッパー４６を回動することにより、略水平位置から下方に略９０°の範囲で回動することができる。
前記針５０後方にチューブ５１を装着し、当該チューブ５１はストッパー４６後方から、ハウジング４２の内部空間４４を経て、ハウジング４２後方に延設されている。
FIG. 8 is a schematic view of a medical needle 41 constituting a chemical injection device 41A of the present invention [(A) when the needle 50 is rotated approximately 90 ° downward with respect to the housing 42, (B) the needle 50 is moved to the housing 42. 9 is a cross-sectional view of FIG. 8 [(A), (B), (C)]. Corresponds to (A), (B), and (C) of FIG. 8, FIG. 10 is a cross-sectional view and a side view of FIG. 8 [(A) is a vertical central cross-sectional view of FIG. 8 (C), and (B). FIG. 8C is a transverse central cross-sectional view (drawing viewed from above), (C) is the horizontal central cross-sectional view (drawing viewed from below), and (D) is a left side view of FIG. 8C. FIG. 8E is a right side view of FIG.
As illustrated in FIGS. 8 to 10, the medical needle 41 has a hinge hub 45 in which a needle 50 is implanted in front of a housing 42, and a stopper 46 is crowned on the hinge hub 45. The hinge hub 45 is loosely fitted to the stopper 46, and the needle 50 can be rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper 46.
A tube 51 is mounted behind the needle 50, and the tube 51 extends from the back of the stopper 46 to the back of the housing 42 through the internal space 44 of the housing 42.

医療用針４１は、図１から図５の医療用針１の「ボールハブ５」を「ヒンジハブ４５」に置換したものである。
ヒンジハブ４５の両側に突部４５Ａを形成し、当該突部４５Ａをストッパー４６の溝４６Ａに遊嵌した点を除いて、その他の形状、材料、使用方法は医療用針１と実質的に同じであるから詳細な説明は省略する。 The medical needle 41 is obtained by replacing the “ball hub 5” of the medical needle 1 of FIGS. 1 to 5 with a “hinge hub 45”.
Other shapes, materials, and usage methods are substantially the same as those of the medical needle 1 except that protrusions 45A are formed on both sides of the hinge hub 45 and the protrusions 45A are loosely fitted in the grooves 46A of the stopper 46. Therefore, detailed description is omitted.

本発明の薬液注入装置１Ａを構成する医療用針１の概略図［（Ａ）針１０をハウジング２に対して略９０°下方に回動したとき、（Ｂ）針１０をハウジング２に対して略４５°下方に回動したとき、（Ｃ）針１０をハウジング２に対して水平にしたとき］Schematic diagram of a medical needle 1 constituting the chemical injection device 1A of the present invention [(A) When the needle 10 is rotated approximately 90 ° downward with respect to the housing 2, (B) the needle 10 with respect to the housing 2] When rotated downward by approximately 45 ° (C) When the needle 10 is leveled with respect to the housing 2] 針１０に針カバー１２を被冠するときの概略図［（Ａ）は被冠する前、（Ｂ）は被冠する途中、（Ｃ）は被冠後］Schematic view when the needle cover 12 is crowned on the needle 10 [(A) before crowning, (B) during crowning, (C) after crowning] 図１の断面図［（Ａ）、（Ｂ）、（Ｃ）はそれぞれ図１（Ａ）、（Ｂ）、（Ｃ）に対応する］Sectional views of FIG. 1 [(A), (B), (C) correspond to FIGS. 1 (A), (B), (C), respectively]] 図１の断面図と側面図［（Ａ）は図１（Ｃ）の中央縦断面図、（Ｂ）は図１（Ｃ）の中央横断面図（上から見た図面）、（Ｃ）は同中央横断面図（下から見た図面）、（Ｄ）は図１（Ｃ）の左側面図、（Ｅ）は図１（Ｃ）の右側面図］1 (C) is a central longitudinal sectional view of FIG. 1 (C), (B) is a central transverse sectional view of FIG. 1 (C) (drawing seen from above), and FIG. The central cross-sectional view (drawing from below), (D) is a left side view of FIG. 1 (C), (E) is a right side view of FIG. 1 (C)] 針１０に針カバー１２を被冠するときの断面図［（Ａ）は被冠する前、（Ｂ）は被冠する途中、（Ｃ）は被冠後、（Ｄ）は（Ｃ）の一部拡大図］Sectional view when the needle cover 12 is crowned on the needle 10 [(A) is before crowning, (B) is during crowning, (C) is after crowning, (D) is one of (C)] Part enlarged view] 本発明の薬液注入装置２１Ａを構成する医療用針２１の断面図［（Ａ）針３０をハウジング２２に対して略９０°下方に回動したとき、（Ｂ）針３０をハウジング２２に対して略４５°下方に回動したとき、（Ｃ）針３０をハウジング２２に対して水平にしたとき］Sectional view of the medical needle 21 constituting the medicinal solution injection device 21A of the present invention [(A) When the needle 30 is rotated approximately 90 ° downward with respect to the housing 22, (B) the needle 30 with respect to the housing 22] When rotated downward by approximately 45 ° (C) When the needle 30 is leveled with respect to the housing 22] 医療用針２１の断面図と側面図［（Ａ）は図６（Ｃ）と同じ断面図、（Ｂ）は（Ａ）の横中央断面図（上から見た図面）、（Ｃ）は同横中央断面図（下から見た図面）、（Ｄ）は図６（Ｃ）の左側面図、（Ｅ）は図６（Ｃ）の右側面図］Sectional view and side view of medical needle 21 [(A) is the same sectional view as FIG. 6 (C), (B) is a transverse central sectional view of (A) (viewed from above), (C) is the same Horizontal center sectional view (drawing from below), (D) is a left side view of FIG. 6 (C), (E) is a right side view of FIG. 6 (C)] 本発明の薬液注入装置４１Ａを構成する医療用針４１の概略図［（Ａ）針５０をハウジング４２に対して略９０°下方に回動したとき、（Ｂ）針５０をハウジング４２に対して略４５°下方に回動したとき、（Ｃ）針５０をハウジング４２に対して水平にしたとき］Schematic diagram of the medical needle 41 constituting the medicinal solution injection device 41A of the present invention [(A) when the needle 50 is rotated approximately 90 ° downward with respect to the housing 42, (B) the needle 50 with respect to the housing 42] When rotated downward by approximately 45 ° (C) When the needle 50 is leveled with respect to the housing 42] 図８の断面図［（Ａ）、（Ｂ）、（Ｃ）は図８の（Ａ）、（Ｂ）、（Ｃ）に対応する］Sectional views of FIG. 8 [(A), (B), (C) correspond to (A), (B), (C) of FIG. 8] 図８の断面図と側面図［（Ａ）は図８（Ｃ）の縦中央断面図、（Ｂ）は図８（Ｃ）の横中央断面図（上から見た図面）、（Ｃ）は同横中央断面図（下から見た図面）、（Ｄ）は図８（Ｃ）の左側面図、（Ｅ）は図８（Ｃ）の右側面図］8 is a cross-sectional view and a side view [(A) is a vertical central cross-sectional view of FIG. 8 (C), (B) is a horizontal central cross-sectional view of FIG. 8 (C) (viewed from above), Cross sectional view (drawing from below), (D) is a left side view of FIG. 8 (C), (E) is a right side view of FIG. 8 (C)] 従来の薬液注入装置の概略図Schematic diagram of conventional chemical injection device

Explanation of symbols

１Ａ、２１Ａ、４１Ａ薬液注入装置
１、２１、４１医療用針
２、２２、４２ハウジング
２２Ａ孔
２Ｆ、２２Ｆ、４２Ｆ突起（フック、係止部）
３、４３（ハウジング）溝
４、４４（ハウジング）空間
５、２５ボールハブ
５Ａ孔
２５Ａ（第一の）孔
２５Ｂ（第二の）孔
６、２６（ボールハブ）ストッパー
７（ストッパー前方）溝
８（ストッパー後方）溝
２７（ストッパー前方）溝
１０、３０、５０針
１１、３１、５１チューブ
１２針カバー
１３鍔
１４（前方）開口部
１５（後方）開口部
１６（医療用針の収納）空間
１７後方壁面
４５ヒンジハブ
４５Ａ突部
４５Ａ１孔
４６Ａ溝部
４６（ヒンジハブ）ストッパー
４７（ストッパー前方）溝
４８（ストッパー後方）溝
1A, 21A, 41A Chemical liquid injectors 1, 21, 41 Medical needles 2, 22, 42 Housing 22A Holes 2F, 22F, 42F Protrusions (hooks, locking portions)
3, 43 (housing) grooves 4, 44 (housing) space 5, 25 ball hub 5A hole 25A (first) hole 25B (second) hole 6, 26 (ball hub) stopper 7 ( stopper front) groove 8 ( stopper ) Rear) Groove 27 ( Stopper Front) Groove 10, 30, 50 Needle 11, 31, 51 Tube 12 Needle Cover 13 鍔 14 (Front) Opening 15 (Back) Opening 16 (Housing for Medical Needle) Space 17 Back Wall 45 Hinge Hub 45A Projection
45A1 hole 46A groove 46 (hinge hub) stopper 47 ( stopper front) groove 48 ( stopper rear) groove

Claims

A medical needle (1) and a needle cover (12) having a housing (2), a ball hub (5) and a stopper (6);
The housing (2) is formed in a cylindrical shape,
The housing (2) has a notch (3) formed in the front, a protrusion (2F) capable of locking the needle cover (12) in the rear, and a ball hub (5) in the front end. Wearing,
The ball hub (5) is formed in a spherical shape, a hole (5A) is formed through the center from the front to the rear, and the rear of the needle (10) is inserted in front of the hole (5A). ,
The stopper (6) is formed in a cylindrical shape, and notched grooves (7, 8) are formed in the front and rear, respectively.
The stopper (6) is mounted so as to cover the ball hub (5) and is mounted in front of the housing (2),
The ball hub (5) is loosely fitted between the housing (2) and the stopper (6),
The needle (10) is rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper (6),
A tube (11) is attached to the rear of the needle (10), and the tube (11) passes from the rear of the stopper (6) through the internal space (4) of the housing (2) to the rear of the housing (2). Extended to
The needle cover (12) is formed in a substantially cylindrical shape, with openings (14, 15) formed at the front and rear, respectively, and a rear wall surface (17) slightly narrowed at the rear.
The needle cover (12) has a space (16) in which the medical needle (1) can be accommodated, and the rear wall surface (17) is a protrusion (2F) of the housing (2) of the medical needle (1). Formed so that it can be locked to
An inner diameter of the rear wall surface (17) of the needle cover (12) is slightly smaller than an outer diameter in the vicinity of the protrusion (2F) of the housing (2) of the medical needle (1),
When the needle cover (12) is slid in the forward direction of the needle (10) to be crowned, the wall surface (17) gets over the protrusion (2F) and is mutually connected to the protrusion (2F). And the wall surface (17) is fixed to the outer periphery of the housing (2),
Therefore, the needle cover (12) is formed so as not to move in the opposite direction to the needle (10) and the needle (10) is not exposed to the outside from the needle cover (12). A chemical injection device (1A).

A medical needle (21) and a needle cover (12) having a housing (22), a ball hub (25), and a stopper (26);
The housing (22) is formed in a cylindrical shape,
The housing (22) has a hole (22A) for allowing liquid to flow forward, a protrusion (22F) capable of locking the needle cover (12) at the rear, and a ball hub at the front end. (25)
The ball hub (25) is formed in a spherical shape, and a first hole (25A) is formed from the front to the center, and extends from the center to the rear at a predetermined angle from the first hole (25A). A second hole (25B) is formed therethrough, the back of the needle (30) is inserted into the first hole (25A),
The second hole (25B) is formed so as to communicate with the hole (22A) for allowing the liquid in the housing (22) to flow therethrough,
The stopper (26) is formed in a cylindrical shape, and a notch groove (27) is formed in the front,
The stopper (26) is mounted so as to cover the ball hub (25) and is mounted in front of the housing (22),
The ball hub (25) is loosely fitted between the housing (22) and the stopper (26),
The needle (30) is rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper (26),
From the rear of the housing (22) to the internal space (24) of the housing (22), the tip of the tube (31) is extended and attached,
The needle cover (12) is formed in a substantially cylindrical shape, with openings (14, 15) formed at the front and rear, respectively, and a wall (17) with a slightly narrow diameter formed at the rear,
The needle cover (12) has a space (16) in which the medical needle (21) can be accommodated, and the rear wall surface (17) is a protrusion (2F) of the housing (22) of the medical needle (21). Formed so that it can be locked to
The inner diameter of the wall surface (17) of the needle cover (12) is formed slightly smaller than the outer diameter in the vicinity of the protrusion (2F) of the housing (22) of the medical needle (21),
When the needle cover (12) is slid in the forward direction of the needle (30) to be crowned, the wall surface (17) gets over the protrusion (2F) and is in mutual contact with the protrusion (2F). The wall surface (17) is fixed to the outer periphery of the housing (2),
For this reason, the needle cover (12) is formed so as not to move in the direction opposite to the front of the needle (30), and the needle (30) is not exposed from the needle cover (12). A chemical injection device (21A).

A housing (42), a hinge hub (45), a stopper (46), and a needle cover (12);
The housing (42) is formed in a cylindrical shape,
The housing (42) has a notch (43) formed in the front, a protrusion (42F) capable of locking the needle cover (12) in the rear, and a hinge hub (45) in the front end. Wearing
The hinge hub (45) is formed in a cylindrical shape, and the hinge hub (45) forms a protrusion (45A) on the outer wall portion, and the protrusion 45A is allowed to play in the groove (46A) of the stopper (46). Fit,
A hole (45A1) is formed through the center from the front to the rear, and the back of the needle (10) is inserted in front of the hole (45A1).
The stopper (46) is formed in a cylindrical shape, and notched grooves (47, 48) are formed in the front and rear, respectively.
The stopper (46) has a groove (46A) for loosely fitting the protrusion (45A) of the hinge hub (45) on the inner wall, and is mounted so as to cover the hinge hub (45). Mounted in front of the housing (42);
The hinge hub (45) is loosely fitted between the housing (42) and the stopper (46),
The needle (50) is rotated in a range of approximately 90 ° downward from a substantially horizontal position by rotating the stopper (46),
A tube (51) is attached to the back of the needle (50), and the tube (51) passes from the back of the stopper (46) through the internal space (44) of the housing (42) to the back of the housing (42). Extended to
The needle cover (12) is formed in a substantially cylindrical shape, with openings (14, 15) formed at the front and rear, respectively, and a wall (17) with a slightly narrow diameter formed at the rear,
The needle cover (12) has a space (16) in which the medical needle (41) can be accommodated, and a rear wall surface (17) is provided on the protrusion (2F) of the housing (42) of the medical needle (41). Formed so that it can be locked to
The inner surface of the wall surface (17) of the needle cover (12) is formed slightly smaller than the outer diameter in the vicinity of the protrusion (42F) of the housing (42) of the medical needle (1),
When the needle cover (12) is slid in the forward direction of the needle (50) to be crowned, the wall surface (17) gets over the protrusion (42F) and interacts with the protrusion (42F). And the wall surface (17) is fixed to the outer periphery of the housing (42),
Therefore, the needle cover (12) is formed so as not to move in the direction opposite to the front of the needle (50), and the needle (50) is not exposed from the needle cover (12). A chemical liquid injector (41A).