JPH0761306B2 - Endoscope bending operation device - Google Patents
Endoscope bending operation deviceInfo
- Publication number
- JPH0761306B2 JPH0761306B2 JP62162145A JP16214587A JPH0761306B2 JP H0761306 B2 JPH0761306 B2 JP H0761306B2 JP 62162145 A JP62162145 A JP 62162145A JP 16214587 A JP16214587 A JP 16214587A JP H0761306 B2 JPH0761306 B2 JP H0761306B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- bending
- endoscope
- cam
- piece
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、内視鏡の湾曲部を遠隔的に屈曲操作する内
視鏡の湾曲操作装置に関するものである。TECHNICAL FIELD The present invention relates to a bending operation device for an endoscope, which remotely bends and operates a bending portion of the endoscope.
［従来の技術］ この種の内視鏡の湾曲操作装置には、従来は、湾曲部に
一端が連結された操作ワイヤの他端をラックに連結し、
そのラックと咬み合うピニオンを操作レバーで回転させ
るようにしたラックーピニオン方式や、操作ワイヤーを
プーリに巻回し、そのプーリを回転させるようにしたプ
ーリ方式、あるいは、操作ワイヤを連結したチェーンに
スプロケットを咬み合わせ、そのスプロケットを回転す
るようにしたチェーン−スプロケット方式などが用いら
れていた。[Prior Art] In a bending operation device for an endoscope of this type, conventionally, the other end of an operation wire having one end connected to a bending portion is connected to a rack,
A rack and pinion system in which a pinion that engages with the rack is rotated by an operation lever, a pulley system in which an operation wire is wound around a pulley and the pulley is rotated, or a sprocket is connected to a chain in which the operation wire is connected. A chain-sprocket system was used in which the sprocket was rotated and the sprocket was rotated.
［発明が解決しようとする問題点］ 内視鏡の湾曲操作は、左手の指先が無理なく届く一定範
囲内で操作レバーを動かすことにより全ての湾曲操作を
できるようにすることが、操作性のうえから極めて重要
である。したがって湾曲操作装置は、操作レバーの一操
作によって、操作ワイヤを充分に牽引できるものでなけ
ればならない。しかし、従来の内視鏡の湾曲操作装置
は、いずれも、操作レバーにより回転させられるピニオ
ン、プーリ又はスプロケットの外縁の移動量以上には操
作ワイヤを牽引することができなかった。そのため、操
作レバーの回転量に対して湾曲部を充分に屈曲させよう
とすると、ピニオンやプーリを非常に大きなものにする
か、歯車を幾つか組み合わせて回転角を増やす等の手段
を講じなければならず、装置が大型化又は複雑化して操
作部が重くなり、操作性が悪くなる欠点があった。[Problems to be Solved by the Invention] In bending operation of an endoscope, it is necessary to move all the operation levers within a certain range where the fingertip of the left hand can reach without difficulty. It is extremely important from the top. Therefore, the bending operation device must be capable of sufficiently pulling the operation wire by one operation of the operation lever. However, none of the conventional endoscope bending operation devices can pull the operation wire beyond the amount of movement of the outer edge of the pinion, pulley, or sprocket rotated by the operation lever. Therefore, if it is attempted to bend the bending portion sufficiently with respect to the rotation amount of the operating lever, a pinion or pulley must be made very large, or some gears must be combined to increase the rotation angle. However, there is a drawback in that the device becomes large or complicated and the operating portion becomes heavy, resulting in poor operability.
この発明は、そのような従来の欠点を解消し、小型軽量
な装置で操作ワイヤを充分な長さ牽引することができる
内視鏡の湾曲操作装置を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the related art and to provide a bending operation device for an endoscope capable of pulling an operation wire by a small and lightweight device for a sufficient length.
［問題点を解決するための手段］ 上述の問題点を解決するための、本発明による内視鏡の
湾曲操作装置は、挿入部の先端付近に屈曲自在に設けら
れた湾曲部に操作ワイヤの一端を取着し、その操作ワイ
ヤを操作部から遠隔的に牽引することにより上記湾曲部
を屈曲させるようにした内視鏡の湾曲操作装置におい
て、上記操作部に回転自在に設けられて操作手段により
回動させられると駆動片と、一端がその駆動片に回転自
在に連結され他端に上記操作ワイヤの端部が連結された
連結片と、上記操作ワイヤの引き出し方向を長手方向と
する長円形状に形成されて上記操作部に固定されたカム
とを設け、上記駆動片を回動させたときに上記連結片が
上記カムに沿って移動し、駆動片の回動量に比較して操
作ワイヤの牽引量が大きくなるようにしたことを特徴と
する。[Means for Solving the Problems] A bending operation device for an endoscope according to the present invention for solving the above-mentioned problems is provided with a bending wire provided in a bending portion provided near a distal end of an insertion portion so as to bend an operation wire. A bending operation device for an endoscope in which one end is attached and the operation wire is remotely pulled from the operation part to bend the bending part, the operation means being rotatably provided on the operation part. And a connecting piece having one end rotatably connected to the driving piece and the other end connected to the end portion of the operation wire, and a length having the operation wire as a longitudinal direction. A cam formed in a circular shape and fixed to the operation portion is provided, and when the drive piece is rotated, the connecting piece moves along the cam, and the operation is performed in comparison with the rotation amount of the drive piece. Increased the amount of wire pulling It is characterized by
［作用］ 操作手段により駆動片を回動させると、それに伴って連
結片がカムに沿って回動し、連結片に連結された操作ワ
イヤが牽引されて湾曲部が屈曲する。そして、この際
に、連結片の動きはカムに案内され、駆動片の回動量に
比較して操作ワイヤが大きく牽引される。[Operation] When the drive piece is rotated by the operating means, the connecting piece rotates along with the cam accordingly, and the operation wire connected to the connecting piece is pulled to bend the bending portion. Then, at this time, the movement of the connecting piece is guided by the cam, and the operation wire is pulled largely as compared with the amount of rotation of the driving piece.
［実施例］ 本発明の第１の実施例を第１図ないし第４図にもとづい
て説明する。[Embodiment] A first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
第４図は内視鏡の略示図であり、図中、１は可撓管によ
り外装された挿入部、２は遠隔操作により屈曲自在な湾
曲部、３は、対物光学などが内蔵された先端部、４は操
作部、５は接眼部である。６は、操作部４に回動自在に
設けられた操作手段である操作レバー、７は、その操作
レバー６と一体に回転する回転軸であり、操作レバー６
を回動することにより、湾曲部２の先端に一端が取着さ
れた操作ワイヤが牽引されて、湾曲部２が屈曲すように
なっている。FIG. 4 is a schematic view of an endoscope. In the figure, 1 is an insertion portion that is sheathed by a flexible tube, 2 is a bending portion that is bendable by remote control, and 3 is a built-in objective optics. The tip portion, 4 is an operation portion, and 5 is an eyepiece portion. Reference numeral 6 denotes an operation lever which is an operation means rotatably provided on the operation portion 4, and 7 denotes a rotary shaft which rotates integrally with the operation lever 6.
By rotating the operation wire, one end of which is attached to the distal end of the bending portion 2 is pulled to bend the bending portion 2.
第１図は、操作部４内に設けられた湾曲操作装置の中立
状態の平面図（フレーム21の図示は省略されている）、
第３図はそのIII−III線切断面図である。図中、21は、
操作部４内に固設されたフレームであり、回転軸７を中
心にして、操作ワイヤ22の引き出し方向を長手方向とす
る楕円形状のカム23がフレーム21に一体に形成されてい
る。このカム23は、必ずしも楕円形状である必要はな
く、２次曲線、対数曲線等によって、楕円と近似した長
円形状に形成されていればよい。また、カム23はフレー
ム21と別体に形成されてフレーム21に固着されたもので
あってもよい。FIG. 1 is a plan view of the bending operation device provided in the operation portion 4 in a neutral state (the frame 21 is not shown),
FIG. 3 is a sectional view taken along the line III-III. In the figure, 21 is
An elliptical cam 23, which is a frame fixed in the operation portion 4 and whose longitudinal direction is the direction in which the operation wire 22 is drawn out, is formed integrally with the frame 21 around the rotary shaft 7. The cam 23 does not necessarily have to have an elliptical shape, and may be formed into an elliptical shape approximate to an ellipse by a quadratic curve, a logarithmic curve or the like. Further, the cam 23 may be formed separately from the frame 21 and fixed to the frame 21.
24は、操作部４内に回転自在に設けられ、上記回転軸７
と一体に回転するように回転軸に固着された駆動アーム
（駆動片）である。この駆動アーム24は、円板と両側部
を切除した形状に形成されており、その２隅部に一対の
連結アーム（連結片）25が、連結ピン26を介して、対称
に回転自在に連結されている。そして、その連結アーム
25の自由端側には、操作ワイヤ22の端部が、ワイヤ止め
ピン27を介して回動自在に連結されており、連結アーム
25が操作ワイヤ22に引っ張られて、アーム25の側部がカ
ム23の短径部に接触するように配置されている。24 is rotatably provided in the operation unit 4 and is provided with the rotary shaft 7
Is a drive arm (driving piece) fixed to the rotation shaft so as to rotate integrally with. The drive arm 24 is formed in a shape in which a disk and both sides are cut off, and a pair of connecting arms (connecting pieces) 25 are symmetrically and rotatably connected to each other at two corners thereof via a connecting pin 26. Has been done. And that connecting arm
An end portion of the operation wire 22 is rotatably connected to the free end side of 25 via a wire stop pin 27, and a connecting arm is provided.
25 is pulled by the operation wire 22, and the side portion of the arm 25 is arranged so as to contact the short diameter portion of the cam 23.
第２図は、操作レバーを回動して、駆動アーム24を反時
計方向に回転させた状態を示している。第１図から第２
図に至る間に、引っ張り側の連結アーム25aはカム23に
沿って回動し、次第にカムの長径部側に接触点が移動し
て、カム23により外方に開かれながら移動する。したが
って、連結アーム25が単に駆動アーム24と共に回動する
だけならば、ワイヤ止めピン27は図のＡ点からＢ点にし
か移動しないが、本実施例においてはＡ点からＣ点まで
移動して、操作ワイヤ22が大きく牽引される。FIG. 2 shows a state in which the drive lever 24 is rotated counterclockwise by rotating the operation lever. 1 to 2
In the drawing, the pull-side connecting arm 25a rotates along the cam 23, the contact point gradually moves toward the long diameter side of the cam, and the cam 23 moves while opening outward. Therefore, if the connecting arm 25 simply rotates together with the drive arm 24, the wire stop pin 27 moves only from the point A to the point B in the figure, but in the present embodiment, it moves from the point A to the point C. The operation wire 22 is largely pulled.
このように、本実施例においては小さな装置で操作ワイ
ヤ22のストロークを大きく拡大することができ、カム23
の形状を変えることによってストロークの拡大の程度を
適宜設定することができる。As described above, in the present embodiment, the stroke of the operation wire 22 can be greatly expanded with a small device, and the cam 23
The degree of expansion of the stroke can be appropriately set by changing the shape of.
尚、操作ワイヤ22を戻す（押す）側の連結アーム25b
は、第２図に示されるように、カム23から離れて、操作
ワイヤ22の進行方向に自然な状態で支持される。したが
って、戻り側の操作ワイヤに生ずるたるみは、連結アー
ム25bが適宜の方向に傾くことにより呼吸される。In addition, the connecting arm 25b on the side for returning (pushing) the operation wire 22
2 is supported in a natural state in the traveling direction of the operation wire 22 apart from the cam 23, as shown in FIG. Therefore, the slack generated in the return-side operation wire is breathed when the connecting arm 25b tilts in an appropriate direction.
［発明の効果］ 本発明の内視鏡の湾曲操作装置によれば、駆動片の回動
量に比較して操作ワイヤが大きく牽引されるので、操作
レバーの一操作であらゆる湾曲操作を行うことができて
操作性が良く、しかも装置の構造が簡単で操作部を小型
軽量にすることができ、極めて優れた操作性を得ること
ができる効果がある。EFFECTS OF THE INVENTION According to the bending operation device for an endoscope of the present invention, the operation wire is pulled greatly compared to the amount of rotation of the drive piece, so that any bending operation can be performed by one operation of the operation lever. It is possible to obtain excellent operability, and further, the structure of the device is simple, the operating portion can be made small and lightweight, and extremely excellent operability can be obtained.
第１図は本発明の第１の実施例の平面図、第２図はその
実施例を動作させた状態の平面図、第３図は第１図にお
けるIII−III線切断断面図、第４図は内視鏡の全体略示
図である。 １……挿入部、２……湾曲部、４……操作部、６……操
作レバー（操作手段）、７……回転軸、21……フレー
ム、22……操作ワイヤ、23……カム、24……駆動アー
ム、25……連結アーム、27……ワイヤ止めピン。FIG. 1 is a plan view of a first embodiment of the present invention, FIG. 2 is a plan view of a state in which the embodiment is operated, and FIG. 3 is a sectional view taken along the line III-III in FIG. The figure is an overall schematic view of an endoscope. 1 ... insertion part, 2 ... bending part, 4 ... operating part, 6 ... operating lever (operating means), 7 ... rotary shaft, 21 ... frame, 22 ... operating wire, 23 ... cam, 24 …… Drive arm, 25 …… Coupling arm, 27 …… Wire stop pin.
Claims (1)
湾曲部に操作ワイヤーの一端を取着し、その操作ワイヤ
を操作部から遠隔的に牽引することにより上記湾曲部を
屈曲させるようにした内視鏡の湾曲操作装置において、
上記操作部に回転自在に設けられて操作手段により回動
させられる駆動片と、一端がその駆動片に回動自在に連
結され他端に上記操作ワイヤの端部が連結された連結片
と、上記操作ワイヤの引き出し方向を長手方向とする長
円形状に形成されて上記操作部に固定されたカムとを設
け、上記駆動片を回動させたときに上記連結片が上記カ
ムに沿って移動し、駆動片の回動量に比較して操作ワイ
ヤの牽引量が大きくなるようにしたことを特徴とする内
視鏡の湾曲操作装置。Claim: What is claimed is: 1. An end of an operating wire is attached to a bending portion provided near the distal end of an insertion portion so that the bending portion can be bent by pulling the operating wire remotely from the operating portion. In the bending operation device of the endoscope,
A drive piece rotatably provided on the operation portion and rotated by an operation means; a connecting piece having one end rotatably connected to the drive piece and the other end connected to an end portion of the operation wire; A cam fixed to the operation portion is formed in an elliptical shape whose longitudinal direction is the pull-out direction of the operation wire, and the connecting piece moves along the cam when the drive piece is rotated. The bending operation device for an endoscope, wherein the pulling amount of the operation wire is set to be larger than the turning amount of the driving piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162145A JPH0761306B2 (en) | 1987-06-29 | 1987-06-29 | Endoscope bending operation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162145A JPH0761306B2 (en) | 1987-06-29 | 1987-06-29 | Endoscope bending operation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS645523A JPS645523A (en) | 1989-01-10 |
| JPH0761306B2 true JPH0761306B2 (en) | 1995-07-05 |
Family
ID=15748892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62162145A Expired - Fee Related JPH0761306B2 (en) | 1987-06-29 | 1987-06-29 | Endoscope bending operation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0761306B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016147457A1 (en) * | 2015-03-18 | 2016-09-22 | オリンパス株式会社 | Bending operation device and endoscope |
| JP6710066B2 (en) * | 2016-03-07 | 2020-06-17 | 株式会社カネカ | Catheter handle and catheter having the same |
-
1987
- 1987-06-29 JP JP62162145A patent/JPH0761306B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS645523A (en) | 1989-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |