JPH07289636A - Endoscope dealing tool - Google Patents
Endoscope dealing toolInfo
- Publication number
- JPH07289636A JPH07289636A JP6084655A JP8465594A JPH07289636A JP H07289636 A JPH07289636 A JP H07289636A JP 6084655 A JP6084655 A JP 6084655A JP 8465594 A JP8465594 A JP 8465594A JP H07289636 A JPH07289636 A JP H07289636A
- Authority
- JP
- Japan
- Prior art keywords
- outer sheath
- sheath
- press
- endoscope
- fitted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Surgical Instruments (AREA)
- Endoscopes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内視鏡の挿通用チャン
ネルを通じて体腔内に挿入して処置を行う内視鏡用処置
具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment tool for an endoscope which is inserted into a body cavity through a channel for insertion of an endoscope for treatment.
【０００２】[0002]
【従来の技術】一般に、この種の内視鏡用処置具は、可
撓性の外シースの基端に操作部本体を接続してなり、そ
の操作部本体と外シースとの接続は、操作部本体の先端
に突出したパイプ状の取付け部分に、熱成形した外シー
スの基端部を圧入して被嵌固定している。2. Description of the Related Art Generally, a treatment instrument for an endoscope of this type has an operation section body connected to a proximal end of a flexible outer sheath, and the operation section body and the outer sheath are connected by an operation. The base end of the thermoformed outer sheath is press-fitted and fixed to the pipe-shaped mounting portion projecting from the tip of the main body.
【０００３】また、この外シースの取付け強度を高める
ため、発明者は、図６で示すように構成するものを考え
た（実願平５−２３６３５号の未公開出願の明細書を参
照）。これは、操作部本体６０の先端にパイプ状の取付
け部６１を設け、この取付け部６１の先端外周には突起
６２を形成している。そして、この取付け部６１に外シ
ース６３の基端部を圧入する。その後で、突起６２より
基端側に位置する外シース６３の部分をその被嵌部の外
径より小さい内径を有する管状の押え部材６４を強く圧
入して突起６２より基端側に位置させる。これにより外
シース６３を押え部材６４により締め付けて接続固定す
ることができる。この押え部材６４はシリコンゴムのよ
うな弾性体でも良く、外シース６３を強く締め付けられ
れば、問題なかった。Further, in order to increase the attachment strength of the outer sheath, the inventor has considered a structure shown in FIG. 6 (see the specification of unpublished application of Japanese Patent Application No. Hei 5-23635). This is provided with a pipe-shaped attachment portion 61 at the tip of the operation portion main body 60, and a projection 62 is formed on the outer periphery of the tip end of the attachment portion 61. Then, the base end portion of the outer sheath 63 is press-fitted into the mounting portion 61. After that, the tubular pressing member 64 having an inner diameter smaller than the outer diameter of the fitting portion is strongly press-fitted into the portion of the outer sheath 63 located on the proximal side of the projection 62 to locate it on the proximal side of the projection 62. As a result, the outer sheath 63 can be tightened by the pressing member 64 to be connected and fixed. The pressing member 64 may be an elastic body such as silicon rubber, and there is no problem if the outer sheath 63 is strongly tightened.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、この外
シース６３を被嵌する取付け部６１は、通常、操作部本
体６０と一体に形成されるが、この操作部本体６０は、
一般的に、ポリプロピレン等の曲げ強度、１０〜５０Ｍ
Ｐａの熱可塑性樹脂で形成する場合が多いが、この場合
には、押え部材６４で強く締め付けて固定を行うと、操
作部本体６０および取付け部６１の曲げ強度が弱いた
め、押え部材６４により強く締め付けても、外シース６
３を被嵌する取付け部６１が押し潰される傾向がある。However, the mounting portion 61 to which the outer sheath 63 is fitted is usually formed integrally with the operating portion main body 60, but the operating portion main body 60 is
Generally, bending strength of polypropylene etc., 10-50M
In many cases, it is formed of a thermoplastic resin of Pa. In this case, if the pressing member 64 is strongly tightened and fixed, the bending strength of the operation portion main body 60 and the mounting portion 61 is weak, so that the pressing member 64 is stronger. Even when tightened, the outer sheath 6
There is a tendency that the mounting portion 61 in which the 3 is fitted is crushed.
【０００５】この結果、突起６１のより基端側の部分の
内径が縮少してしまう。そして、外シース６３および操
作部本体６０内に挿通される可動部材６５またはその可
動部材６５の連結部６６が引っ掛り、円滑な作動を妨げ
たり、内孔が小さくなり送液量が少なくなる等の問題が
起きる可能性がある。As a result, the inner diameter of the portion of the protrusion 61 closer to the base end is reduced. Then, the movable member 65 or the connecting portion 66 of the movable member 65 that is inserted into the outer sheath 63 and the operation portion main body 60 is caught, hinders smooth operation, the inner hole becomes small, and the liquid delivery amount decreases. Problems may occur.
【０００６】また、操作部本体６０や取付け部６１の内
径が縮少しないようにするためには、その取付け部６１
の肉厚を大きくすれば良いが、そうすると今度は外シー
ス６３の内径に比べて取付け部６１の外径が極端に大き
くなるため、外シース６３の圧入ができなくなり、たと
え、外シース６３の基端部分を熱成形により広げた後に
圧入しようとしても、取付け部６１の外径が外シース６
３の内径の通常熱成形範囲を超えてしまう虞れがある。Further, in order to prevent the inner diameters of the operation portion main body 60 and the mounting portion 61 from shrinking, the mounting portion 61
However, since the outer diameter of the mounting portion 61 becomes extremely larger than the inner diameter of the outer sheath 63, the outer sheath 63 cannot be press-fitted. Even if the end portion is expanded by thermoforming and then press-fitted, the outer diameter of the attachment portion 61 is equal to that of the outer sheath 6.
There is a risk of exceeding the normal thermoforming range of the inner diameter of 3.
【０００７】本発明は前記課題に着目してなされたもの
であり、その目的とするところは、可撓性のシースを被
嵌する取付け部の曲げ強度に拘らず、その取付け部を押
し潰すことなく、そのシースを確実に接続することがで
きる内視鏡用処置具を提供することにある。The present invention has been made in view of the above-mentioned problems, and an object thereof is to crush the mounting portion regardless of the bending strength of the mounting portion to which the flexible sheath is fitted. The object is to provide a treatment tool for an endoscope that can reliably connect the sheath without the need.
【０００８】[0008]
【課題を解決する手段および作用】本発明は、可撓性の
シースと、このシースの基端に接続された操作部本体と
を備えた内視鏡用処置具において、前記操作部本体に設
けられ前記シースの基端部を圧入して被嵌するとともに
内孔を有した取付け部を設け、この取付け部の外周に
は、前記操作部本体の長手方向にずれて間隔を開けた２
つの環状の突起部と、この突起部間の位置に形成された
溝部とを設け、さらに、前記溝部に対応して位置する圧
入後の可撓性シースの部分の外周に被嵌されるリング状
の押え部材を設け、この押え部材はその内径が、前記溝
部に位置する圧入後の前記可撓性シースの部分の外径と
略同等より大きく、かつ前記突起部に対応して位置する
圧入後の可撓性シースの部分の外径より小さくしたもの
である。SUMMARY OF THE INVENTION The present invention provides a treatment instrument for an endoscope including a flexible sheath and an operating portion main body connected to the proximal end of the sheath, and is provided in the operating portion main body. A fitting portion having an inner hole is formed by press-fitting the base end portion of the sheath and is fitted to the outer peripheral portion of the fitting portion.
Two annular protrusions and a groove formed at a position between the protrusions are provided, and a ring shape fitted to the outer periphery of the portion of the flexible sheath after press fitting that is located corresponding to the groove. After the press-fitting member whose inner diameter is larger than the outer diameter of the portion of the flexible sheath after the press-fitting which is located in the groove portion and which is located corresponding to the protruding portion. Is smaller than the outer diameter of the flexible sheath portion.
【０００９】これにより、環状の突起部の間でシースは
押え部材により強く締め付けられない。また、可撓性の
シースはその接続部分より抜ける方向に引っ張られても
押え部材に引っ掛かり、抜け防止がなされる。As a result, the sheath is not strongly tightened by the pressing member between the annular protrusions. Further, even if the flexible sheath is pulled in the direction of coming off from the connecting portion, the flexible sheath is caught by the pressing member and is prevented from coming off.
【００１０】[0010]
（第１の実施例）図１及び図２に基づいて本発明の第１
の実施例の説明を行う。図１は内視鏡用処置具として注
射針の全体を縦断した断面図であり、図２はその図１中
Ａ部を拡大して示すものである。(First Embodiment) A first embodiment of the present invention based on FIGS. 1 and 2.
The embodiment will be described. FIG. 1 is a longitudinal sectional view of an injection needle as a treatment tool for an endoscope, and FIG. 2 is an enlarged view of portion A in FIG.
【００１１】この内視鏡用注射針１は、可撓性を有する
外シース２の基端に操作部本体３を連結してなる。操作
部本体３は、例えば、ポリプロピレン、ポリエチレン、
ＡＢＳ、ナイロン等で、その曲げ強度が１０〜５０ＭＰ
ａの熱可塑性樹脂材料により、略筒状に形成されてい
る。操作部本体３の先端部分には、後述するように前記
外シース２の基端部分を被嵌して固定する取付け部４が
設けられている。外シース２は、例えばポリエチレン、
フッ素樹脂、ポリ塩化ビニール、ポリウレタン等の可撓
性のある合成樹脂により形成されている。The endoscope injection needle 1 comprises an operating portion body 3 connected to the proximal end of a flexible outer sheath 2. The operation unit body 3 is made of, for example, polypropylene, polyethylene,
Bending strength of ABS, nylon, etc. is 10 to 50MP
The thermoplastic resin material a is formed into a substantially cylindrical shape. A mounting portion 4 for fitting and fixing the proximal end portion of the outer sheath 2 is provided on the distal end portion of the operation portion main body 3, as described later. The outer sheath 2 is, for example, polyethylene,
It is made of a flexible synthetic resin such as fluororesin, polyvinyl chloride, and polyurethane.
【００１２】操作部本体３には、外シース２と同軸的に
連なる通路用の内孔５が前記取付け部４にわたり設けら
れており、この内孔５の基端開口部には、内腔が外に向
かって広くなる拡径部６が形成されている。この拡径部
６は後述する接続口体１３を係着する係合部を構成する
ものである。拡径部６の開口端縁内周には、環状リブか
らなる圧接用突起７が形成されている。The operation portion main body 3 is provided with an inner hole 5 for a passage which is coaxially connected to the outer sheath 2 over the attachment portion 4. The proximal end opening portion of the inner hole 5 has an inner cavity. The enlarged diameter portion 6 that widens outward is formed. The enlarged diameter portion 6 constitutes an engaging portion for engaging a connection port body 13 described later. On the inner circumference of the opening end edge of the expanded diameter portion 6, a press-contacting projection 7 formed of an annular rib is formed.
【００１３】操作部本体１の内孔５には、可動操作部材
１１が進退移動自在に挿通されている。この可動操作部
材１１はその基端に図示しない注射筒などの注入器を嵌
着して接続するためのテーパ状の嵌合孔１２を有した接
続口体１３を設けている。この接続口体１３は可動操作
部材１１の操作体を兼ねる。接続口体１３の背面は後述
する拡径部６のテーパ状の嵌合部１５に係合するテーパ
外周面１６として形成されている。A movable operation member 11 is inserted into the inner hole 5 of the operation portion main body 1 so as to be movable back and forth. The movable operation member 11 is provided with a connection port body 13 having a tapered fitting hole 12 for fitting and connecting an injector such as an injection cylinder (not shown) at the base end thereof. The connection port body 13 also serves as an operating body of the movable operating member 11. The rear surface of the connection port body 13 is formed as a tapered outer peripheral surface 16 that engages with a tapered fitting portion 15 of the expanded diameter portion 6 described later.
【００１４】この可動操作部材１１の接続口体１３も前
記操作部本体３と同様、ポリプロピレン、ポリエチレ
ン、ＡＢＳ、ナイロン等の曲げ強度が１０〜５０ＭＰａ
の熱可塑性樹脂材料により一体に形成されている。The connection port body 13 of the movable operating member 11 has a bending strength of 10 to 50 MPa, such as polypropylene, polyethylene, ABS, nylon, etc., similarly to the operating portion body 3.
Are integrally formed of the thermoplastic resin material.
【００１５】前記拡径部６において前記圧接用突起７よ
り奥側には、テーパ状の嵌合部１５が形成されており、
これは、可動操作体１１の接続口体１３が拡径部６に差
し込まれたとき、その接続口体１３のテーパ外周面１６
に密着して嵌合させる係合部を構成している。また、接
続口体１３の外周に圧接用突起７が圧接することによ
り、操作部本体３に接続口体１３が嵌着して係合固定さ
れるようになっている。すなわち、圧接用突起７および
接続口体１３の外径は、操作部本体３にその接続口体１
３を係合するとき、圧接用突起７に対して接続口体１３
の外周が弾性的に圧接する寸法となっており、この係合
部は着脱自在であるとともに、接続口体１３の押込み係
着状態を維持する機能を有する。A tapered fitting portion 15 is formed in the expanded diameter portion 6 on the inner side of the pressure contact projection 7,
This is because when the connection port body 13 of the movable operating body 11 is inserted into the enlarged diameter portion 6, the tapered outer peripheral surface 16 of the connection port body 13 is inserted.
To form an engaging portion that is closely fitted to. Further, the pressure contact projection 7 is pressed against the outer periphery of the connection port body 13, so that the connection port body 13 is fitted and engaged and fixed to the operation portion main body 3. That is, the outer diameters of the press-contacting projection 7 and the connection port body 13 are the same as those of the operation port body 3
3 is engaged, the connection port body 13 is attached to the press-contacting projection 7.
The outer circumference is elastically press-contacted, and the engaging portion is detachable and has a function of maintaining the push-fitting state of the connection port body 13.
【００１６】接続口体１３の先端には同軸的に連結した
パイプ２１を介して可撓性を有する内チューブ２２の基
端部が取り付けられている。内チューブ２２はポリエチ
レン、フッ素樹脂、ポリ塩化ビニール、ポリウレタン等
の合成樹脂により形成されている。内チューブ２２は前
述した外シース２に進退自在に挿通されており、その内
径は０．６〜１．１mm、肉厚は０．２〜０．３mmである
ことが望ましい。A proximal end portion of a flexible inner tube 22 is attached to the tip of the connection port body 13 via a pipe 21 coaxially connected. The inner tube 22 is formed of a synthetic resin such as polyethylene, fluororesin, polyvinyl chloride, or polyurethane. The inner tube 22 is inserted into the outer sheath 2 so as to be able to move back and forth, and it is desirable that the inner diameter is 0.6 to 1.1 mm and the wall thickness is 0.2 to 0.3 mm.
【００１７】前記内チューブ２２の先端は係止部材２３
に接続される。この係止部材２３は、基端側に突き出し
て内チューブ２２の先端部を被嵌して接続するための筒
状突部２４が細めに形成されている。この筒状の突部２
４の外周には、複数の環状のくさび状突起２５が形成さ
れている。各くさび状突起２５は、被嵌した内チューブ
２２の内面に食い込み係着する向きに形成され、内チュ
ーブ２２の内面に密着して係着する。係止部材２３の筒
状突部２４の外周に対して内チューブ２２を被嵌して接
続した状態において、その突部２４を除く係止部材２３
の先端側部分の外径と内チューブ２２の被嵌部の外径は
等しく面一に形成されている。The tip of the inner tube 22 has a locking member 23.
Connected to. The locking member 23 is formed with a thin cylindrical projection 24 that projects toward the proximal end side and fits and connects the distal end portion of the inner tube 22. This cylindrical protrusion 2
A plurality of annular wedge-shaped projections 25 are formed on the outer circumference of the No. 4. Each wedge-shaped projection 25 is formed in such a direction as to bite into and engage with the inner surface of the fitted inner tube 22, and is closely attached to the inner surface of the inner tube 22. In a state where the inner tube 22 is fitted and connected to the outer circumference of the cylindrical projection 24 of the locking member 23, the locking member 23 excluding the projection 24 is attached.
The outer diameter of the tip side portion and the outer diameter of the fitting portion of the inner tube 22 are formed to be equal and flush.
【００１８】係止部材２３は管状の針体２６を挿通する
内孔２７を形成してなり、この内孔２７に貫通した状態
で針体２６を接着剤等により固着する。係止部材２３と
針体２６との間の隙間は接着剤等により水密となるよう
封止されている。そして、この針体２６は内チューブ２
２を進退することにより、外シース２の先端から突没自
在となっている。The locking member 23 is formed with an inner hole 27 through which the tubular needle body 26 is inserted, and the needle body 26 is fixed with an adhesive or the like while penetrating the inner hole 27. The gap between the locking member 23 and the needle body 26 is watertightly sealed with an adhesive or the like. And this needle body 26 is the inner tube 2
By advancing and retracting 2, the outer sheath 2 can be projected and retracted from the distal end.
【００１９】また、係止部材２３を貫き出た針体２６の
基端部分は、その係止部材２３の内孔２７の径より大き
い径の針拡径部２８が設けられており、仮に係止部材２
３に対する針体２６の接着剤等による固定が外れても、
その針拡径部２８により針体２６が係止部材２３より先
端側に抜けない。つまり、係止部材２３が外れない限
り、内チューブ２２から抜け出さない。係止部材２３は
前述したようにくさび状突起２５により内チューブ２２
の先端部に対して確実に取着され、簡単に外れることが
ない。The proximal end portion of the needle body 26 penetrating the locking member 23 is provided with a needle expanded portion 28 having a diameter larger than the diameter of the inner hole 27 of the locking member 23. Stop member 2
Even if the needle body 26 is not fixed to the needle 3 with an adhesive or the like,
Due to the expanded needle diameter portion 28, the needle body 26 is prevented from coming out of the locking member 23 toward the distal end side. That is, unless the locking member 23 comes off, it does not come out from the inner tube 22. The locking member 23 is formed by the wedge-shaped projection 25 as described above,
It is securely attached to the tip of the and does not come off easily.
【００２０】さらに、外シース２の先端縁にはその外シ
ース２の中心に向かって突き出す環状の係止端部３１が
一体に形成されている。そして、この係止端部３１の突
出高さは、針体２６の先端部が外シース２の先端から所
定の長さだけ突き出したとき、係止部材１７の先端面が
突き当たり、針体２６の突出長を規制するように形成さ
れている。Further, an annular locking end portion 31 projecting toward the center of the outer sheath 2 is integrally formed on the tip edge of the outer sheath 2. The protruding height of the locking end portion 31 is such that when the distal end portion of the needle body 26 projects from the distal end of the outer sheath 2 by a predetermined length, the distal end surface of the locking member 17 abuts and the needle body 26 It is formed to regulate the protruding length.
【００２１】一方、図２で示すように、外シース２の基
端部を取付ける操作部本体３の取付け部４の外周にはそ
れぞれ環状に形成した第１の突起部４１と第２の突起部
４２が前後に位置して間隔をあけて設けられており、第
１の突起部４１と第２の突起部４２の間には環状の溝部
４３が谷部として設けられている。操作部本体３、少な
くとも取付け部４を形成する部分は、ポリプロピレン、
ポリエチレン、ＡＢＳ、ナイロン等で、その曲げ強度が
１０〜５０ＭＰａの熱可塑性樹脂材料により形成されて
いる。On the other hand, as shown in FIG. 2, on the outer periphery of the mounting portion 4 of the operation portion main body 3 to which the base end portion of the outer sheath 2 is attached, a first protrusion portion 41 and a second protrusion portion which are formed in an annular shape, respectively. 42 are provided at the front and rear and are spaced apart from each other, and an annular groove 43 is provided as a valley between the first protrusion 41 and the second protrusion 42. The operation portion main body 3, at least the portion forming the attachment portion 4, is polypropylene,
It is made of polyethylene, ABS, nylon or the like, and is made of a thermoplastic resin material having a bending strength of 10 to 50 MPa.
【００２２】外シース２は、内径が１．３〜１．８mmで
肉厚が０．２〜０．３mmであることが好ましい。また、
第１の突起部４１と第２の突起部４２の先端側縁は、テ
ーパ状に形成されており、このテーパ面４４により外シ
ース２を圧入し易くしている。また、先端側の第１の突
起部４１の後端側の稜には鋭角なエッジ４５が設けられ
ており、これに外シース２が引っ掛かるようになってい
る。さらに、第１の突起部４１と第２の突起部４２の外
径は、外シース２を圧入できる寸法で形成されており、
外シース２の内径より０．５〜１mm程度大きいのが望ま
しい。そうでない場合は外シース２の基端部を熱成形に
より広げた後、取付け部４に圧入して取り付ける。The outer sheath 2 preferably has an inner diameter of 1.3 to 1.8 mm and a wall thickness of 0.2 to 0.3 mm. Also,
The tip side edges of the first protrusion 41 and the second protrusion 42 are formed in a tapered shape, and the tapered surface 44 facilitates the press-fitting of the outer sheath 2. Further, a sharp edge 45 is provided on the ridge on the rear end side of the first protrusion 41 on the front end side, and the outer sheath 2 is hooked on this. Further, the outer diameters of the first protruding portion 41 and the second protruding portion 42 are formed in such a size that the outer sheath 2 can be press-fitted,
It is desirable that the inner diameter of the outer sheath 2 is about 0.5 to 1 mm larger. Otherwise, the base end portion of the outer sheath 2 is expanded by thermoforming, and then the outer sheath 2 is press-fitted into the mounting portion 4 to be mounted.
【００２３】さらに、操作部本体３の取付け部４に被嵌
した外シース２の基端部には、円筒状に形成された押え
部材４６が被嵌される。この押え部材４６はその取付け
部４に外シース２を圧入した後、第１の突起部４１と第
２の突起部４２の間に位置して環状の溝部４３に対応し
た外周部分に被嵌し、外シース２の長手方向にずれるこ
となく位置される。押え部材４６の前後の内腔端面のエ
ッジ４７，４８は外シース２がその取付け部４より抜け
る方向に引っ張られたときに引っ掛かり易いように鋭角
になっている。エッジ４７，４８は、溝部４３に落ち込
んだ外シース２の外周部分に立上がり壁面部に触れてお
り、常に引っ掛っている。Further, a cylindrical pressing member 46 is fitted to the base end portion of the outer sheath 2 fitted to the mounting portion 4 of the operation portion main body 3. After the outer sheath 2 is press-fitted into the mounting portion 4, the pressing member 46 is located between the first protruding portion 41 and the second protruding portion 42 and is fitted to the outer peripheral portion corresponding to the annular groove portion 43. The outer sheath 2 is positioned without being displaced in the longitudinal direction. Edges 47 and 48 on the front and rear end surfaces of the holding member 46 are formed to have an acute angle so that the outer sheath 2 can be easily caught when the outer sheath 2 is pulled in the direction of coming out of the mounting portion 4. The edges 47 and 48 stand on the outer peripheral portion of the outer sheath 2 that has fallen into the groove portion 43 and are in contact with the wall surface portion, and are always caught.
【００２４】押え部材４６は外シース２を強く押し込
み、その外シース２の周部分を環状の溝部４３内に対し
て極力密に嵌め込むように嵌着させる。この場合におい
て、押え部材４６の内径をＤ1 、溝部４３の外径をＤ
2 、外シース２の嵌着圧入部における最大外径をＤ3 と
すると、Ｄ2 ≦Ｄ1 ＜Ｄ3 の関係になっている。The pressing member 46 strongly presses the outer sheath 2 and fits the peripheral portion of the outer sheath 2 into the annular groove 43 so as to be fitted as tightly as possible. In this case, the inner diameter of the pressing member 46 is D 1 , and the outer diameter of the groove portion 43 is D
2, when the maximum outer diameter of the fitted and press-fitted portion of the outer sheath 2 and D 3, have a relationship of D 2 ≦ D 1 <D 3 .
【００２５】この条件の場合においては、溝部４３の内
径の潰れは起こらない。また、押え部材４６の前後のエ
ッジ４７，４８の断面形状は、外シース２が抜ける方向
に引っ張られたときに引っ掛かり易いように鋭角になっ
ているが、この角度が３０゜〜６０゜の場合がシースが
引っ掛かり易く好ましい。Under this condition, the inner diameter of the groove 43 does not collapse. Further, the cross-sectional shape of the front and rear edges 47, 48 of the pressing member 46 is an acute angle so as to be easily caught when the outer sheath 2 is pulled in the direction of removal, but when this angle is 30 ° to 60 ° Is preferable because the sheath is easily caught.
【００２６】さらに、図２で示すように、特に先端側の
エッジ４７と第１の突起部４１のエッジ４５とは略同一
高さで向き合っており、溝部４３から立上る外シース２
の部分４９はその間に挟まれる関係にある。このため、
両エッジ４５，４７の、外シース２に対する抜け防止作
用が高まり、操作部本体１の取付け部４に被嵌した外シ
ース２を確実に保持することができる。Further, as shown in FIG. 2, the edge 47 on the tip side and the edge 45 of the first protrusion 41 face each other at substantially the same height, and the outer sheath 2 rising from the groove 43.
The part 49 of is in a relation sandwiched between them. For this reason,
The action of preventing both edges 45 and 47 from coming off the outer sheath 2 is enhanced, and the outer sheath 2 fitted to the mounting portion 4 of the operation portion main body 1 can be reliably held.
【００２７】このように構成された内視鏡用注射針１
は、接続口体１３を操作体として用いて可動操作部材１
１を手元側に引くことにより、外シース２内に針体２６
を引き込み、この状態で外シース２を内視鏡のチャンネ
ルに挿通して体腔内へ突出させる。そして、内視鏡によ
る観察下で外シース２の先端を目的部位に近付けた後、
可動操作部材１１の接続口体１３を操作部本体３の係合
部に係合するまで前進させることにより、針体２６を外
シース２の先端より突き出させる。The endoscope injection needle 1 configured as described above
Is a movable operating member 1 using the connection port body 13 as an operating body.
By pulling 1 toward the hand side, the needle 26
Is pulled in, and in this state, the outer sheath 2 is inserted into the channel of the endoscope and projected into the body cavity. After bringing the tip of the outer sheath 2 close to the target site under observation with an endoscope,
The needle body 26 is projected from the tip of the outer sheath 2 by advancing the connection port body 13 of the movable operating member 11 until it engages with the engaging portion of the operating portion main body 3.
【００２８】この時、可動操作部材１１の接続口体１３
側面が圧接用突起７と弾性的に圧接し、可動操作部材１
１の押し込み状態を維持する。操作部本体３および接続
口体１３は曲げ強度が１０〜５０ＭＰａのポリプロピレ
ン等の熱可塑性樹脂により形成されているので、圧接用
突起７と接続口体１３が圧接した時、その弾性的な力が
操作者の手に伝わり易く、この感覚がいわゆるクリック
感として認識でき、操作者は確実に可動操作部材１１が
操作部本体３に固定されていることを知ることができ
る。At this time, the connection port body 13 of the movable operating member 11
The side surface elastically press-contacts with the press-contacting projection 7, and the movable operation member 1
Maintain the push-in state of 1. Since the operation portion main body 3 and the connection opening body 13 are formed of a thermoplastic resin such as polypropylene having a bending strength of 10 to 50 MPa, when the press contact projection 7 and the connection opening body 13 are pressed together, the elastic force thereof is It is easily transmitted to the operator's hand, and this sensation can be recognized as a so-called click feeling, and the operator can surely know that the movable operation member 11 is fixed to the operation section body 3.
【００２９】針体２６を突出状態に固定した後、体内組
織にその針体２６を穿刺し、接続口体１３に取り付けら
れた図示しない注入器により薬液等を注入する。注入
後、可動操作部材１１を後退させることで、針体２６を
外シース２内に引き込み、外シース２を内視鏡のチャン
ネルより抜去する。抜去する際、外シース２を持たず、
操作部本体３や可動操作体１１を持って抜去すると、外
シース２と操作部本体３の間に引っ張り力がかかる。し
かし、外シース２は、操作部本体３の取付け部４の外周
に圧入されており、前述した各突起部４１，４２および
押え部材４６で押えられ、さらに、各エッジ４５，４
７，４８に引っ掛かり、外シース２が抜けることはな
い。After fixing the needle body 26 in the protruding state, the needle body 26 is punctured in the body tissue, and a chemical solution or the like is injected by an injector (not shown) attached to the connection port body 13. After the injection, the movable operation member 11 is retracted to pull the needle body 26 into the outer sheath 2 and remove the outer sheath 2 from the channel of the endoscope. When removing, without the outer sheath 2,
When the operation unit body 3 and the movable operation body 11 are pulled out and pulled out, a pulling force is applied between the outer sheath 2 and the operation unit body 3. However, the outer sheath 2 is press-fitted into the outer periphery of the mounting portion 4 of the operation portion main body 3, is pressed by the above-mentioned projections 41, 42 and the pressing member 46, and further, the edges 45, 4 are also pressed.
The outer sheath 2 does not come off due to being caught by the wires 7, 48.
【００３０】特に、外シース２は取付け部４に圧入して
被嵌されているが、第１の突起部４１のエッジ４５と押
え部材４６のエッジ４７，４８に引っ掛かることで、強
い引っ張り力量に対しても確実に固定されるので、押え
部材４６により強く締め付ける必要がなく、操作部本体
３がポリプロピレン等の曲げ強度が１０〜５０ＭＰａの
熱可塑性樹脂により形成されている場合でも、溝部４３
の内径がつぶれることなく確実にその内径が保たれる。
その結果、内チューブ２２は、溝部４３の内側部分に対
してスムーズに摺動可能となり、可動操作部１１の進退
動作が悪くなる等といった問題も起こらない。In particular, the outer sheath 2 is press-fitted into the mounting portion 4 and fitted therein, but by being caught by the edge 45 of the first projection 41 and the edges 47 and 48 of the pressing member 46, a strong amount of pulling force is obtained. Since it is securely fixed against the pressing member 46, it is not necessary to strongly tighten the pressing member 46, and even if the operation portion main body 3 is formed of a thermoplastic resin such as polypropylene having a bending strength of 10 to 50 MPa, the groove portion 43 is formed.
The inner diameter of the is securely maintained without being crushed.
As a result, the inner tube 22 can be smoothly slid with respect to the inner portion of the groove portion 43, and there is no problem such that the advancing / retreating operation of the movable operation portion 11 is deteriorated.
【００３１】押え部材４６の長さは、その両端のエッジ
４７，４８に対して外シース２が引っ掛かるように設定
されており、押え部材４６の内径がＤ2 ≦Ｄ1 ＜Ｄ3 の
範囲で大きくなるにつれて押え部材４６の長さも長くな
る。The length of the pressing member 46 is set so that the outer sheath 2 is caught by the edges 47 and 48 at both ends thereof, and the inner diameter of the pressing member 46 is within the range of D 2 ≤D 1 <D 3 . As the size increases, the length of the pressing member 46 also increases.
【００３２】（第２の実施例）図３及び図４に基づいて
本発明の第１の実施例の説明を行う。図３は内視鏡用注
射針１の操作部を縦断して示す断面図であり、図４はそ
の図３中、Ｂ−Ｂ線に沿う横断面図である。(Second Embodiment) The first embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a cross-sectional view showing the operating portion of the endoscope injection needle 1 in a vertical section, and FIG. 4 is a cross-sectional view taken along line BB in FIG.
【００３３】この実施例において押え部材４６は、その
先端側部分の内面に溝部４３に向かって突出する環状の
嵌合部５１を有しており、環状の嵌合部５１はこれで押
し潰した外シース２の部分を溝部４３に押し込み嵌合さ
せる突出量と幅を有する。また、この環状の嵌合部５１
より基端側に位置する押え部材４６の内面は外シース２
及び操作部本体３の取付け部４の一部外周面にわたりそ
れを被覆している。In this embodiment, the pressing member 46 has an annular fitting portion 51 projecting toward the groove portion 43 on the inner surface of the tip side portion thereof, and the annular fitting portion 51 is crushed by this. The outer sheath 2 has a protrusion amount and a width for pressing and fitting the outer sheath 2 into the groove 43. In addition, this annular fitting portion 51
The inner surface of the pressing member 46 located closer to the base end side is the outer sheath 2
And, a part of the outer peripheral surface of the mounting portion 4 of the operation portion main body 3 is covered therewith.
【００３４】図４で示すように、操作部本体３の押え部
材４６において前記押え部材４６を直接的に被覆する部
分５２の周面には、その円筒部の左右に対称的に平坦な
平面部５３ａ，５３ｂを設けた形状をしており、押え部
材４６の基端側部分の内周面はこの被覆する部分５２に
嵌合する形状となっている。これにより押え部材４６は
操作部本体３に対して回転不可となる。As shown in FIG. 4, on the peripheral surface of a portion 52 of the pressing member 46 of the operation portion main body 3 which directly covers the pressing member 46, a flat plane portion symmetrical to the left and right of the cylindrical portion is formed. 53a and 53b are provided, and the inner peripheral surface of the base end side portion of the pressing member 46 is shaped to fit into the covering portion 52. As a result, the pressing member 46 cannot rotate with respect to the operation section body 3.
【００３５】この押え部材４６はＡＢＳ等の表面処理を
行わなくても、シルク印刷が可能な熱可塑性樹脂により
形成されており、その外表面にはシルク印刷により製品
名等の表示がされている。押え部材４６は操作部本体３
に対して回転しないので、その表示位置が定まる。それ
以外は前述した第１の実施例に同じである。The pressing member 46 is formed of a thermoplastic resin capable of silk printing without surface treatment such as ABS, and the product name or the like is displayed on the outer surface thereof by silk printing. . The pressing member 46 is the operation unit main body 3
Since it does not rotate with respect to, the display position is determined. The other points are the same as those in the first embodiment described above.
【００３６】ところで、押え部材４６によって溝部４３
に外シース２の部分を圧入して嵌合させるには、大きな
力が必要である。しかし、この構成においては、押え部
材４６を操作部本体３の一部を被覆するよう大きくした
ことにより、その押え部材４６をしっかりと持つことが
できるので、嵌合部５１により外シース２の部分を溝部
４３へ圧入することが容易になり、その組立作業性が向
上する。By the way, the groove 43 is formed by the pressing member 46.
A large force is required to press-fit and fit the outer sheath 2 portion to. However, in this configuration, since the pressing member 46 is enlarged so as to cover a part of the operation portion main body 3, the pressing member 46 can be firmly held, so that the fitting portion 51 allows the portion of the outer sheath 2 to be held. It becomes easy to press into the groove 43 and the assembling workability is improved.
【００３７】図６は前述した第１の実施例における内視
鏡用注射針１における操作部本体３と可動操作部材１１
の接続口体１３との係合構造の変形例を示すものであ
る。すなわち、操作部本体３の拡径部６の開口端縁内周
に環状に形成された圧接用突起７に対応して、接続口体
１３の基端側の外周にはその可動操作部材１１の長手方
向に沿う複数のリブ５５が設けられており、接続口体１
３が操作部本体３に装着されたとき、このリブ５５が環
状の圧接用突起７と強く圧接する。それ以外は第１の実
施例に同じである。FIG. 6 shows the operation portion main body 3 and the movable operation member 11 of the endoscope injection needle 1 according to the first embodiment.
It shows a modified example of the engagement structure with the connection port body 13. That is, the movable operation member 11 is provided on the outer periphery of the connection port body 13 on the base end side in correspondence with the press-contacting protrusion 7 formed annularly on the inner periphery of the opening end edge of the expanded diameter portion 6 of the operation portion main body 3. A plurality of ribs 55 are provided along the longitudinal direction, and the connection port body 1
When the operation unit body 3 is mounted on the operation portion body 3, the rib 55 strongly presses the annular pressure contact protrusion 7. The other points are the same as in the first embodiment.
【００３８】このような係合構造によれば、環状の圧接
用突起７と可動操作部１１の接続口体１３の周面が圧接
する面積が少なくなるので、環状の圧接用突起７に対し
て可動操作部材１１を軽い力で押し込み、あるいは取り
外しを行うことができる。According to such an engaging structure, the area in which the annular press-contacting projection 7 and the peripheral surface of the connection port body 13 of the movable operation portion 11 press-contact with each other is reduced, so that the annular press-contacting projection 7 is pressed against the annular press-contacting projection 7. The movable operation member 11 can be pushed in or removed with a light force.
【００３９】なお、本発明は注射針の場合に限らず、鉗
子や細胞採取具などの処置に利用される各種の内視鏡用
処置具に適用される。前述した実施例の態様によれば、
特許請求の範囲に記載のものの他に、次の内容のものが
得られる。 （１）可撓性のシースと、このシースの基端に接続され
た操作部本体と、この操作部本体から前記シースにわた
り、進退自在に挿通された可動操作部材と、この可動操
作部材の先端に取り付けられた処置部とを備えた内視鏡
用処置具において、前記操作部本体に設けられ前記シー
スの基端部を圧入して被嵌するとともに前記可動操作部
材を通す内孔を有した取付け部を設け、この取付け部の
外周には、前記操作部本体の長手方向にずれて間隔を開
けた２つの環状の突起部と、この突起部間の位置に形成
された溝部とを設け、さらに、前記溝部に対応して位置
する圧入後の可撓性シースの部分の外周に被嵌されるリ
ング状の押え部材を設け、この押え部材はその内径が、
前記溝部に位置する圧入後の前記可撓性シースの部分の
外径と略同等より大きく、かつ前記突起部に対応して位
置する圧入後の可撓性シースの部分の外径より小さいこ
とを特徴とする内視鏡用処置具。The present invention is not limited to the case of an injection needle, but is applied to various endoscopic treatment tools used for treatment such as forceps and cell collecting tools. According to the aspects of the embodiment described above,
In addition to what is stated in the claims, the following is obtained. (1) A flexible sheath, an operating portion main body connected to a proximal end of the sheath, a movable operating member that is inserted through the operating portion main body so as to extend and retract, and a distal end of the movable operating member. A treatment instrument for an endoscope having a treatment section attached to the operation section body, which has an inner hole through which the proximal end section of the sheath provided in the operation section body is press-fitted and the movable operation member is inserted. A mounting portion is provided, and on the outer circumference of the mounting portion, two annular protrusions that are displaced in the longitudinal direction of the operation portion main body and are spaced apart from each other and a groove portion formed between the protrusions are provided. Further, a ring-shaped pressing member fitted to the outer periphery of the portion of the flexible sheath after press-fitting located corresponding to the groove portion is provided, and the pressing member has an inner diameter of
It is larger than the outer diameter of the portion of the flexible sheath after the press-fitting that is located in the groove portion, and is smaller than the outer diameter of the portion of the flexible sheath after the press-fitting that is located corresponding to the protrusion portion. A characteristic endoscopic treatment tool.
【００４０】（２）可撓性シースと、この可撓性シース
の基端に接続された操作部本体と、この操作部本体から
可撓性シースにわたり進退自在に挿通されかつ前記操作
部本体に対して嵌着する操作体を有した可動操作部材
と、この可動操作部材の先端に取り付けられた処置部と
を備え、前記操作部本体及び操作体が熱可塑性樹脂によ
り形成され、さらに前記操作部本体の基端部内周に設け
られた突起部と、この突起部に弾性的に圧接させること
により前記操作体を嵌着する内視鏡用処置具において、
前記操作部本体に設けられ前記可撓性シースの基端部を
圧入して被嵌するとともに前記可動操作部材を通す内孔
を有した取付け部を設け、取付け部の外周には、前記操
作部本体の長手方向に間隔を開けた２つの環状の突起部
と、この突起部の間に形成された環状の溝部（谷部）と
を設け、前記溝部に対応位置する可撓性シースの部分の
外周に装嵌される押え部材を設け、この押え部材はその
内径が、圧入後の溝部に位置する前記可撓性シースの部
分の外径と略同等あるいはそれより大きく、かつ圧入後
の環状の突起部に対応して位置する部分の外径より小さ
いことを特徴とする内視鏡用処置具。 （３）前記押え部材の内孔端のエッジの断面形状の角度
が鋭角であることを特徴とする第１項または第２項に記
載の内視鏡用処置具。(2) A flexible sheath, an operation section main body connected to the proximal end of the flexible sheath, an operation section main body, a flexible sheath, and a flexible sheath. A movable operation member having an operation body fitted to the opposite side, and a treatment section attached to the tip of the movable operation member are provided, the operation section body and the operation body are formed of a thermoplastic resin, and the operation section is further provided. A projection provided on the inner circumference of the base end portion of the main body, and an endoscopic treatment tool in which the operating body is fitted by elastically contacting the projection,
A mounting portion is provided on the operation portion main body, in which the proximal end portion of the flexible sheath is press-fitted and fitted, and an attachment portion having an inner hole for passing the movable operation member is provided, and the operation portion is provided on the outer periphery of the attachment portion. Two annular protrusions spaced apart in the longitudinal direction of the main body and an annular groove (valley) formed between the protrusions are provided, and a flexible sheath portion located corresponding to the groove is provided. A pressing member to be fitted on the outer periphery is provided, and the pressing member has an inner diameter substantially equal to or larger than the outer diameter of the portion of the flexible sheath located in the groove portion after press-fitting, and an annular shape after press-fitting. A treatment instrument for an endoscope, which is smaller than the outer diameter of a portion located corresponding to the protrusion. (3) The treatment tool for an endoscope according to item 1 or 2, wherein an angle of a cross-sectional shape of an edge of an inner hole end of the pressing member is an acute angle.
【００４１】[0041]
【発明の効果】以上説明したように本発明によれば、可
撓性のシースを被嵌する取付け部の曲げ強度に拘らず、
その取付け部を押し潰すことなく、そのシースを確実に
接続することができる内視鏡用処置具を提供することが
できる。As described above, according to the present invention, irrespective of the bending strength of the mounting portion to which the flexible sheath is fitted,
It is possible to provide an endoscopic treatment tool capable of reliably connecting the sheath without crushing the attachment portion.
【図１】本発明の第１の実施例に係る内視鏡用注射針の
全体を縦断して示す断面図。FIG. 1 is a cross-sectional view showing an entire length of an endoscope injection needle according to a first embodiment of the present invention.
【図２】内視鏡用注射針における外シース取付け部分の
拡大断面図。FIG. 2 is an enlarged cross-sectional view of an outer sheath attachment portion of the endoscope injection needle.
【図３】本発明の第２の実施例に係る内視鏡用注射針の
操作部を縦断して示す断面図。FIG. 3 is a cross-sectional view showing a longitudinal section of an operating portion of an endoscope injection needle according to a second embodiment of the present invention.
【図４】図３中、Ｂ−Ｂ線に沿う断面図。FIG. 4 is a sectional view taken along line BB in FIG.
【図５】前記内視鏡用注射針における操作部本体と可動
操作体との係合部構造の変形例を示す断面図。FIG. 5 is a cross-sectional view showing a modified example of the structure of the engaging portion between the operating portion main body and the movable operating body in the endoscope injection needle.
【図６】別出願で提案されている内視鏡用注射針の操作
部を縦断して示す断面図。FIG. 6 is a cross-sectional view showing a longitudinal section of an operating portion of an endoscope injection needle proposed in another application.
１…内視鏡用注射針、２…外シース、３…操作部本体、
４…取付け部、５…内孔、６…拡径部、７…圧接用突
起、１１…可動操作部材、１２…嵌合孔、１３…接続口
体、１５…嵌合部、１６…テーパ外周面、２２…内チュ
ーブ、２３…係止部材、４１…第１の突起部、４２…第
２の突起部、４３…環状の溝部、４６…押え部材。1 ... Endoscope injection needle, 2 ... Outer sheath, 3 ... Operation part main body,
4 ... Attachment part, 5 ... Inner hole, 6 ... Expanded part, 7 ... Pressure contact projection, 11 ... Movable operating member, 12 ... Fitting hole, 13 ... Connection port body, 15 ... Fitting part, 16 ... Taper outer periphery Surface, 22 ... Inner tube, 23 ... Locking member, 41 ... First protrusion, 42 ... Second protrusion, 43 ... Annular groove, 46 ... Holding member.
Claims (1)
続された操作部本体とを備えた内視鏡用処置具におい
て、 前記操作部本体に設けられ前記シースの基端部を圧入し
て被嵌するとともに内孔を有した取付け部を設け、この
取付け部の外周には、前記操作部本体の長手方向にずれ
て間隔を開けた２つの環状の突起部と、この突起部間の
位置に形成された溝部とを設け、さらに、前記溝部に対
応して位置する圧入後の可撓性シースの部分の外周に被
嵌されるリング状の押え部材を設け、この押え部材はそ
の内径が、前記溝部に位置する圧入後の前記可撓性シー
スの部分の外径と略同等より大きく、かつ前記突起部に
対応して位置する圧入後の可撓性シースの部分の外径よ
り小さいことを特徴とする内視鏡用処置具。1. A treatment instrument for an endoscope comprising a flexible sheath and an operating portion main body connected to a proximal end of the sheath, wherein a proximal end portion of the sheath is provided on the operating portion main body. A mounting portion that is press-fitted and fitted and has an inner hole is provided, and on the outer circumference of the mounting portion, two annular projection portions that are spaced apart from each other in the longitudinal direction of the operation portion main body and the projection portion are provided. And a groove portion formed at a position between them, and further, a ring-shaped pressing member fitted to the outer periphery of a portion of the flexible sheath after press fitting located corresponding to the groove portion is provided. The inner diameter is larger than the outer diameter of the portion of the flexible sheath after the press-fitting that is located in the groove portion, and is the outer diameter of the portion of the flexible sheath after the press-fitting that is located corresponding to the protruding portion. A treatment instrument for an endoscope, which is smaller in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08465594A JP3184041B2 (en) | 1994-04-22 | 1994-04-22 | Endoscope treatment tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08465594A JP3184041B2 (en) | 1994-04-22 | 1994-04-22 | Endoscope treatment tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07289636A true JPH07289636A (en) | 1995-11-07 |
| JP3184041B2 JP3184041B2 (en) | 2001-07-09 |
Family
ID=13836740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08465594A Expired - Lifetime JP3184041B2 (en) | 1994-04-22 | 1994-04-22 | Endoscope treatment tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3184041B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002065596A (en) * | 2000-08-25 | 2002-03-05 | Asahi Optical Co Ltd | Piping connection part for endoscope |
| JP2008000431A (en) * | 2006-06-23 | 2008-01-10 | Olympus Medical Systems Corp | Treatment device for endoscope |
| WO2010074153A1 (en) * | 2008-12-24 | 2010-07-01 | オリンパスメディカルシステムズ株式会社 | Treatment instrument |
| WO2015033618A1 (en) * | 2013-09-04 | 2015-03-12 | オリンパスメディカルシステムズ株式会社 | Puncture treatment tool for endoscope |
| JP2015188588A (en) * | 2014-03-28 | 2015-11-02 | 住友ベークライト株式会社 | Injection needle for endoscope and manufacturing method of injection needle for endoscope |
-
1994
- 1994-04-22 JP JP08465594A patent/JP3184041B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002065596A (en) * | 2000-08-25 | 2002-03-05 | Asahi Optical Co Ltd | Piping connection part for endoscope |
| JP2008000431A (en) * | 2006-06-23 | 2008-01-10 | Olympus Medical Systems Corp | Treatment device for endoscope |
| JP4624964B2 (en) * | 2006-06-23 | 2011-02-02 | オリンパスメディカルシステムズ株式会社 | Endoscopic treatment tool |
| WO2010074153A1 (en) * | 2008-12-24 | 2010-07-01 | オリンパスメディカルシステムズ株式会社 | Treatment instrument |
| JP4669090B2 (en) * | 2008-12-24 | 2011-04-13 | オリンパスメディカルシステムズ株式会社 | Treatment tool |
| WO2015033618A1 (en) * | 2013-09-04 | 2015-03-12 | オリンパスメディカルシステムズ株式会社 | Puncture treatment tool for endoscope |
| JP5816777B2 (en) * | 2013-09-04 | 2015-11-18 | オリンパス株式会社 | Endoscopic puncture device |
| JP2015188588A (en) * | 2014-03-28 | 2015-11-02 | 住友ベークライト株式会社 | Injection needle for endoscope and manufacturing method of injection needle for endoscope |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3184041B2 (en) | 2001-07-09 |
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