JPH05245102A - Injection means for endoscope - Google Patents

Injection means for endoscope

Info

Publication number
JPH05245102A
JPH05245102A JP4046972A JP4697292A JPH05245102A JP H05245102 A JPH05245102 A JP H05245102A JP 4046972 A JP4046972 A JP 4046972A JP 4697292 A JP4697292 A JP 4697292A JP H05245102 A JPH05245102 A JP H05245102A
Authority
JP
Japan
Prior art keywords
needle
injection
injection needle
tube
endoscope
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.)
Pending
Application number
JP4046972A
Other languages
Japanese (ja)
Inventor
Osamu Kobayashi
理 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP4046972A priority Critical patent/JPH05245102A/en
Publication of JPH05245102A publication Critical patent/JPH05245102A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide the injection means for an endoscope which does not damage the tip of an injection needle at the time of projecting the needle from a sheath pipe. CONSTITUTION:This injection means for the endoscope is constitute by communicating and connecting the injection needle 2, freely insertably and removably in and out of the front end of a slender sheath pipe 1 having flexibility, at the front end of a liquid feed tube 15 inserted freely movably forward and backward into the sheath pipe 1. A needle receiving hole 4 into which the injection needle 2 fits freely insertably is formed at the front end of the sheath pipe 1 and is so adapted that at least the needle tip strains within the needle receiving hole 4 when the injection needle 2 is retracted into the deepest part in the sheath pipe 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、内視鏡の鉗子チャン
ネル内に挿通して体腔内に注射をするための内視鏡用注
射具に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope injector for inserting the forceps channel of an endoscope into a body cavity for injection.

【0002】[0002]

【従来の技術】この種の内視鏡用注射具は、可撓性のあ
る細長い外套管内に進退自在に挿通された送液チューブ
の先端に注射針を取り付け、送液チューブの手元側に取
り付けられた口金に注射器を接続して、注射器から注射
針に薬液等を送り出すことができるようにしている。
2. Description of the Related Art An endoscope injection instrument of this type is mounted on the proximal side of the liquid feeding tube by attaching an injection needle to the tip of the liquid feeding tube which is inserted in a flexible elongated outer tube so as to be able to move forward and backward. A syringe is connected to the mouthpiece so that the liquid medicine can be delivered from the syringe to the injection needle.

【0003】図6は、そのような内視鏡用注射具の針が
引き込まれた状態の先端部分を示しており、91は外套
管、92は送液チューブ、93は注射針である。外套管
91の先端には、注射針93が突出しすぎるのを規制す
るためのストッパ94が固着されており、その中心軸位
置には注射針93がゆるく嵌合する針受け孔95が穿設
されている。
FIG. 6 shows a distal end portion of such an endoscope injection tool in a state in which a needle is retracted, in which 91 is an outer tube, 92 is a liquid feeding tube, and 93 is an injection needle. A stopper 94 for restricting the excessive protrusion of the injection needle 93 is fixed to the distal end of the outer tube 91, and a needle receiving hole 95 into which the injection needle 93 is loosely fitted is formed in the central axis position of the stopper 94. ing.

【0004】そして、注射針93の基部の外周側に固着
されたストッパ筒96の先端がストッパ94の内面に当
接することによって、注射針93がそれ以上先へ突出す
ることができない状態になる。
The tip of the stopper tube 96 fixed to the outer peripheral side of the base of the injection needle 93 comes into contact with the inner surface of the stopper 94, so that the injection needle 93 cannot project any further.

【0005】[0005]

【発明が解決しようとする課題】上述のように構成され
た従来の内視鏡用注射具は、図6に示されるように、注
射針93が外套管91内に最も奥まで引き込まれた状態
のときには、注射針93の先が針受け孔95よりも内側
に位置するようになっている。
In the conventional endoscope injection instrument constructed as described above, as shown in FIG. 6, the injection needle 93 is pulled into the outermost tube 91 as far as it will go. At this time, the tip of the injection needle 93 is located inside the needle receiving hole 95.

【0006】しかし、その状態から注射針93を先へ突
き出すと、注射針93の先端の刃の部分がストッパ94
の内面にぶつかりながら針受け孔95内に導かれるの
で、針先の刃が変形したりなまったりして、すぐに切れ
が悪くなってしまう等の欠点がある。
However, when the injection needle 93 is pushed out from that state, the blade portion at the tip of the injection needle 93 is stopped by the stopper 94.
Since it is guided into the needle receiving hole 95 while hitting the inner surface of the needle, there is a drawback that the blade of the needle tip is deformed or blunted, and the cutting becomes bad immediately.

【0007】そこで本発明は、外套管から注射針を突き
出す際に針先を傷めることのない内視鏡用注射具を提供
することを目的とする。
Therefore, an object of the present invention is to provide an endoscope injection tool which does not damage the needle tip when the injection needle is projected from the outer tube.

【0008】[0008]

【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡用注射具は、可撓性のある細長い外
套管内に進退自在に挿通した送液チューブの先端に、上
記外套管の先端から出入り自在に注射針を連通接続した
内視鏡用注射具において、上記注射針が挿通自在に嵌合
する針受け孔を上記外套管の先端に形成すると共に、上
記注射針が上記外套管内に最も奥まで引き込まれた状態
のときに上記注射針の少なくとも針先が上記針受け孔内
に留まるようにしたことを特徴とする。
In order to achieve the above object, the endoscope injection tool of the present invention has the above-mentioned distal end of a liquid-feeding tube which is inserted into a flexible elongated outer tube so as to advance and retract. In an endoscope injection tool in which an injection needle is communicatively connected to the distal end of the outer tube, a needle receiving hole into which the injection needle is inserted is formed at the distal end of the outer tube, and the injection needle is It is characterized in that at least the needle tip of the injection needle is retained in the needle receiving hole when it is pulled into the outermost tube to the deepest position.

【0009】[0009]

【実施例】図面を参照して実施例を説明する。図2は内
視鏡用注射具の手元部分、図3はその先端部分を示して
いる。
Embodiments will be described with reference to the drawings. 2 shows a proximal portion of the endoscope injection tool, and FIG. 3 shows a distal end portion thereof.

【0010】図中1は、例えば外径が約2mmで長さが
1.5m程度の密巻きコイルからなる可撓性のある細長
い外套管である。この外套管1は、断面を偏平にしたス
テンレス鋼線を、隣接する線どうしが押し付け合わされ
るように、初張力を与えてコイル状に密巻きされてい
る。
In FIG. 1, reference numeral 1 denotes a flexible elongated outer tube composed of a tightly wound coil having an outer diameter of about 2 mm and a length of about 1.5 m. The outer tube 1 is formed by closely winding a stainless steel wire having a flat cross section into a coil shape by applying initial tension so that adjacent wires are pressed against each other.

【0011】外套管1の先端には、先端部分を滑らかな
形状にカバーすると共に、注射針2が突出しすぎるのを
規制するためのストッパ3が固着されている。ストッパ
3の中央部分には、注射針2が挿通自在にゆるく嵌合す
る針受け孔4が、外套管1の軸線上に穿設されている。
A stopper 3 is fixed to the distal end of the outer tube 1 to cover the distal end portion in a smooth shape and to prevent the injection needle 2 from protruding too much. In the central portion of the stopper 3, a needle receiving hole 4 into which the injection needle 2 is loosely fitted so as to be insertable is formed on the axis of the outer tube 1.

【0012】外套管1の手元側には、筒状の本体5が外
套管1に対して同軸に連結接続されている。本体5の手
元側端部は開口しており、その端面部分にOリング6を
止めるための押さえナット7が螺合している。
A tubular body 5 is coaxially connected to the outer tube 1 on the proximal side thereof. An end portion of the main body 5 on the proximal side is open, and a holding nut 7 for stopping the O-ring 6 is screwed into the end surface portion.

【0013】9は、外套管1と本体5とを連結するため
に外套管1の手元側端部に固着された連結管であり、止
めビス10によって本体5に固定されている。11は、
外套管1が本体5との接続部近傍で折れ曲がらないよう
にするために、外套管1の外側に装着された折れ止めコ
イルである。
Reference numeral 9 denotes a connecting tube fixed to the proximal end of the outer tube 1 for connecting the outer tube 1 and the main body 5, and is fixed to the main body 5 by a stop screw 10. 11 is
It is a fold prevention coil attached to the outside of the outer jacket tube 1 so that the outer jacket tube 1 does not bend near the connection portion with the main body 5.

【0014】外套管1内には、ほぼ全長にわたって、フ
ッ素樹脂チューブ等からなる送液チューブ15が進退自
在に挿通されている。そして、送液チューブ15の先端
に、外套管1先端のストッパ3から出入り自在に注射針
2が連通固着されている。
A liquid feeding tube 15 made of a fluororesin tube or the like is inserted into the outer tube 1 so as to extend and retract over substantially the entire length. The injection needle 2 is fixedly connected to the distal end of the liquid supply tube 15 so as to be able to move in and out from the stopper 3 at the distal end of the outer tube 1.

【0015】ただし、送液チューブ15と注射針2との
間にはストッパ3を通過できない太さのストッパ管17
が介装されている。したがって、図3に示されるよう
に、ストッパ管17がストッパ3の内側にぶつかれば、
注射針2はそれ以上先へ突出することはできない。
However, a stopper tube 17 having a thickness such that the stopper 3 cannot pass between the liquid feeding tube 15 and the injection needle 2.
Is installed. Therefore, as shown in FIG. 3, if the stopper tube 17 hits the inside of the stopper 3,
The injection needle 2 cannot project any further.

【0016】送液チューブ15の手元側には、ステンレ
スパイプ製の継ぎ管18を介して、注射器接続口金20
が、本体5の手元側から突出して進退自在に連通固着さ
れている。
A syringe connection mouthpiece 20 is provided on the proximal side of the liquid supply tube 15 via a connecting pipe 18 made of a stainless pipe.
However, it projects from the hand side of the main body 5 and is fixed in communication so that it can move back and forth.

【0017】また、送液チューブ15を軸方向に進退さ
せるために、注射器接続口金20には継ぎ管18を同軸
に囲む筒状の操作筒21が固着されている。
Further, in order to advance / retreat the liquid supply tube 15 in the axial direction, a cylindrical operation cylinder 21 coaxially surrounding the joint pipe 18 is fixed to the syringe connection mouthpiece 20.

【0018】操作筒21は、本体5内に進退自在に嵌合
している。したがって、操作筒21を指先で摘んで軸方
向に進退操作させることができる。図2に示されるよう
に操作筒21を本体5内に押し込めば、図3に示される
ように、先端から注射針2が突出する。図4に示される
ように、操作筒21を本体5から引き出せば、図1に示
されるように、注射針2が外套管1内に引き込まれる。
The operating cylinder 21 is fitted in the main body 5 so as to be able to move back and forth. Therefore, the operating cylinder 21 can be pinched with a fingertip and moved forward and backward in the axial direction. When the operating cylinder 21 is pushed into the main body 5 as shown in FIG. 2, the injection needle 2 projects from the tip as shown in FIG. As shown in FIG. 4, when the operating cylinder 21 is pulled out from the main body 5, the injection needle 2 is pulled into the outer tube 1 as shown in FIG.

【0019】本実施例の内視鏡用注射具においては、注
射針2が外套管1内に最も奥まで引き込まれた状態のと
きでも、図1に示されるように、針受け孔4内に注射針
2が留まるように形成されている。
In the endoscope injection tool of this embodiment, even when the injection needle 2 is retracted into the outermost tube 1 as far as it will go, it is inserted into the needle receiving hole 4 as shown in FIG. The injection needle 2 is formed so as to remain.

【0020】本実施例のように密巻きコイルで形成され
た外套管1は、例えば図4に示されるように屈曲させた
状態にすると、真直の状態のときに比べて全長が実質的
に伸びる。その結果、注射針2は外套管1内にさらに引
き込まれる。逆に、外套管1を真直の状態にすると、注
射針2は先側へ押し出される。
When the outer tube 1 formed of a tightly wound coil as in this embodiment is bent as shown in FIG. 4, for example, the entire length thereof is substantially longer than that in the straight state. .. As a result, the injection needle 2 is further drawn into the outer tube 1. On the contrary, when the mantle tube 1 is straightened, the injection needle 2 is pushed forward.

【0021】本実施例の内視鏡用注射具は、そのいずれ
の状態のときにも、操作筒21を本体5から引き出した
状態では、注射針2の針先がストッパ3から前方に突出
することも外套管1内に引き込まれてしまうこともな
く、少なくとも注射針2の針先が針受け孔4内に留まる
ように、図1に示されるように針受け孔4の長さLを充
分に長くとってある。
In any of the endoscope injection tools of this embodiment, the needle tip of the injection needle 2 projects forward from the stopper 3 when the operation tube 21 is pulled out from the body 5. As shown in FIG. 1, the length L of the needle receiving hole 4 is sufficient so that at least the needle tip of the injection needle 2 remains in the needle receiving hole 4 without being pulled into the outer tube 1. It has been taken for a long time.

【0022】図2に戻って、操作筒21の外周面には、
Oリング6と係合する一対の溝23,24が間隔をあけ
て形成されており、Oリング6がこの溝23,24のい
ずれか一方と係合すると、操作筒21はその位置でクリ
ックがきいて安定して停止する。
Returning to FIG. 2, on the outer peripheral surface of the operating cylinder 21,
A pair of grooves 23 and 24 that engage with the O-ring 6 are formed at intervals, and when the O-ring 6 engages with either of the grooves 23 and 24, the operating cylinder 21 clicks at that position. And stop steadily.

【0023】このように構成された内視鏡用注射具によ
れば、操作筒21を本体5から引き出してOリング6を
先側の溝24と係合された図4の状態では、外套管1を
真直にした状態でも屈曲させた状態でも、注射針2の針
先がストッパ3の表面から突出することなく、少なくと
も針先が針受け孔4内に嵌合している。したがって、次
に注射針2を先側へ押し出す際に針先は何にもぶつから
ずにスムーズに外方に突出される。
According to the thus constructed endoscope injection tool, in the state of FIG. 4 in which the operation tube 21 is pulled out from the main body 5 and the O-ring 6 is engaged with the groove 24 on the front side, the mantle tube is inserted. Whether the needle 1 is straightened or bent, the needle tip of the injection needle 2 does not protrude from the surface of the stopper 3, and at least the needle tip is fitted in the needle receiving hole 4. Therefore, when the injection needle 2 is pushed out to the front side next time, the needle tip does not hit anything and is smoothly projected outward.

【0024】図5は本発明の第2の実施例を示してお
り、注射針2の針先が針受け孔4内に嵌合した状態より
奥へ引き込まれないように規制するためのストッパ30
を外套管1の内面に固着したものである。
FIG. 5 shows a second embodiment of the present invention, which is a stopper 30 for restricting the needle tip of the injection needle 2 from being pulled in further than the state in which it is fitted in the needle receiving hole 4.
Is fixed to the inner surface of the outer tube 1.

【0025】このように構成すれば、注射針2の先端が
針受け孔4から外れて外套管1内へ引き込まれるのを、
より確実に規制することができる。なお、ストッパ30
は、例えば銀ロー付けによって外套管1に固着されてお
り、注射針2の後半部に接続するために径が太くなった
部分の送液チューブ15がストッパ30に当接する。
According to this structure, the distal end of the injection needle 2 is pulled out of the needle receiving hole 4 and drawn into the mantle tube 1.
It can be regulated more reliably. The stopper 30
Is fixed to the outer tube 1 by, for example, silver brazing, and a portion of the liquid feeding tube 15 having a larger diameter for connecting to the latter half of the injection needle 2 contacts the stopper 30.

【0026】[0026]

【発明の効果】本発明の内視鏡用注射具によれば、注射
針が外套管内に最も奥まで引き込まれた状態のときに
も、注射針の少なくとも針先が針受け孔内に留まるの
で、次に注射針を前方に押し出したとき、注射針の先端
は何にもぶつからずスムーズに外方に押し出される。
According to the endoscope injection tool of the present invention, at least the needle tip of the injection needle remains in the needle receiving hole even when the injection needle is retracted deepest into the mantle tube. The next time the needle is pushed forward, the tip of the needle is pushed outward smoothly without hitting anything.

【0027】したがって、外套管から注射針を突き出す
際に針先が傷んだりなまったりせず、良い切れ味を保つ
ことができる優れた効果を有する。
Therefore, when the injection needle is pushed out from the outer tube, the needle tip is not damaged or blunted, and the excellent sharpness can be maintained.

【図面の簡単な説明】[Brief description of drawings]

【図1】第1の実施例の針引き込み時の先端側の側面断
面図である。
FIG. 1 is a side sectional view of a tip side when a needle is pulled in according to a first embodiment.

【図2】第1の実施例の内視鏡用注射具の針突出時の手
元側の側面断面図である。
FIG. 2 is a side cross-sectional view on the proximal side when the needle of the endoscope injection tool of the first embodiment is projected.

【図3】第1の実施例の内視鏡用注射具の針突出時の先
端側の側面断面図である。
FIG. 3 is a side cross-sectional view of the distal end side when the needle of the endoscope injection device according to the first embodiment is projected.

【図4】第1の実施例の内視鏡用注射具の針引き込み時
の手元側の側面図である。
FIG. 4 is a side view of the endoscope injection tool of the first embodiment on the hand side when the needle is retracted.

【図5】第2の実施例の針引き込み時の先端側の側面断
面図である。
FIG. 5 is a side sectional view of the distal end side of the second embodiment when the needle is retracted.

【図6】従来例の針引き込み時の先端側の側面断面図で
ある。
FIG. 6 is a side sectional view of the tip side when the needle is retracted in the conventional example.

【符号の説明】[Explanation of symbols]

1 外套管 2 注射針 4 針受け孔 15 送液チューブ 1 Outer tube 2 Injection needle 4 Needle receiving hole 15 Liquid feeding tube

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】可撓性のある細長い外套管内に進退自在に
挿通した送液チューブの先端に、上記外套管の先端から
出入り自在に注射針を連通接続した内視鏡用注射具にお
いて、 上記注射針が挿通自在に嵌合する針受け孔を上記外套管
の先端に形成すると共に、上記注射針が上記外套管内に
最も奥まで引き込まれた状態のときに上記注射針の少な
くとも針先が上記針受け孔内に留まるようにしたことを
特徴とする内視鏡用注射具。
1. An endoscope injection device in which an injection needle is connected to the tip of a liquid feed tube that is inserted into a flexible elongated outer tube so as to be able to move forward and backward, and the needle can be inserted into and removed from the tip of the outer tube. A needle receiving hole into which the injection needle is inserted is formed at the distal end of the outer tube, and at least the needle tip of the injection needle is in the state where the injection needle is pulled deepest into the outer tube. An endoscope injection device characterized in that it is adapted to remain in the needle receiving hole.
JP4046972A 1992-03-04 1992-03-04 Injection means for endoscope Pending JPH05245102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4046972A JPH05245102A (en) 1992-03-04 1992-03-04 Injection means for endoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4046972A JPH05245102A (en) 1992-03-04 1992-03-04 Injection means for endoscope

Publications (1)

Publication Number Publication Date
JPH05245102A true JPH05245102A (en) 1993-09-24

Family

ID=12762167

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4046972A Pending JPH05245102A (en) 1992-03-04 1992-03-04 Injection means for endoscope

Country Status (1)

Country Link
JP (1) JPH05245102A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000166862A (en) * 1998-12-09 2000-06-20 Asahi Optical Co Ltd Puncturing device for endoscope
JP2000166863A (en) * 1998-12-09 2000-06-20 Asahi Optical Co Ltd Puncturing device for endoscope
JP2019527095A (en) * 2016-07-14 2019-09-26 スパイレーション インコーポレイテッド ディー ビー エイ オリンパス レスピラトリー アメリカ Needle handle
JP2020127683A (en) * 2019-02-12 2020-08-27 株式会社カネカ Medical lancing device and manufacturing method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000166862A (en) * 1998-12-09 2000-06-20 Asahi Optical Co Ltd Puncturing device for endoscope
JP2000166863A (en) * 1998-12-09 2000-06-20 Asahi Optical Co Ltd Puncturing device for endoscope
JP2019527095A (en) * 2016-07-14 2019-09-26 スパイレーション インコーポレイテッド ディー ビー エイ オリンパス レスピラトリー アメリカ Needle handle
JP2020127683A (en) * 2019-02-12 2020-08-27 株式会社カネカ Medical lancing device and manufacturing method thereof

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