JPH0458933A - Curvature device for endoscope - Google Patents
Curvature device for endoscopeInfo
- Publication number
- JPH0458933A JPH0458933A JP2172424A JP17242490A JPH0458933A JP H0458933 A JPH0458933 A JP H0458933A JP 2172424 A JP2172424 A JP 2172424A JP 17242490 A JP17242490 A JP 17242490A JP H0458933 A JPH0458933 A JP H0458933A
- Authority
- JP
- Japan
- Prior art keywords
- operating wire
- coil
- coil spring
- tension
- operating
- 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
Links
- 238000005452 bending Methods 0.000 claims description 22
- 230000037431 insertion Effects 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005219 brazing Methods 0.000 abstract description 3
- 229910052709 silver Inorganic materials 0.000 abstract description 3
- 239000004332 silver Substances 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract 4
- 239000003245 coal Substances 0.000 abstract 1
- 230000005489 elastic deformation Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Endoscopes (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、内視鏡の挿入部の先端に設けられた湾曲部
を遠隔操作によって屈曲させるための内視鏡の湾曲装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscope bending device for bending a bending portion provided at the distal end of an insertion portion of an endoscope by remote control.
従来の内視鏡の湾曲装置においては、可撓管内において
、操作ワイヤがガイド用の密巻コイル内に進退自在に挿
通されていて、その密巻コイルの両端は固定されている
。また、操作ワイヤの両端は、密巻コイルの両端が固定
された部材と継かった部材に支持されている。In a conventional bending device for an endoscope, an operating wire is inserted into a flexible tube so that it can move forward and backward through a tightly wound guide coil, and both ends of the tightly wound coil are fixed. Further, both ends of the operating wire are supported by a member connected to a member to which both ends of the tightly wound coil are fixed.
密巻コイルは、曲げられると必ず全長か長くなる性質が
ある。したがって、内視鏡の挿入部を形成する可撓管が
曲げられると、密巻コイルの全長が長くなって、その内
部に挿通された操作ワイヤは両端側へ強く引張られ、操
作ワイヤに加わる張力が増大する。Closely wound coils have the property of always increasing their total length when bent. Therefore, when the flexible tube that forms the insertion section of the endoscope is bent, the total length of the tightly wound coil becomes longer, and the operating wire inserted into the coil is strongly pulled toward both ends, causing tension to be applied to the operating wire. increases.
特に、可撓管がループを形成するくらい大きく曲げられ
ると、密巻コイルの全長が大幅に長くなることによって
、操作ワイヤの張力か著しく増大するため、湾曲操作が
重くなって操作に支障をきたしたり、湾曲部が小さく波
打ってごつごつした形状になって、患者の体腔内粘膜に
触れる外表面が滑らかでなくなってしまう。In particular, when the flexible tube is bent to the extent that it forms a loop, the total length of the tightly wound coil increases significantly, which significantly increases the tension on the operating wire, making the bending operation difficult and hindering the operation. Or, the curved portion may have a small, wavy, and rugged shape, and the outer surface that comes into contact with the mucous membrane in the patient's body cavity is no longer smooth.
この発明は、そのような従来の欠点を解消し、内視鏡の
挿入部を形成する可撓管をループ状に曲げても、操作ワ
イヤに過大な張力が加わらない内視鏡の湾曲装置を提供
することを目的とする。The present invention eliminates such conventional drawbacks and provides an endoscope bending device that does not apply excessive tension to the operating wire even when the flexible tube forming the insertion portion of the endoscope is bent into a loop shape. The purpose is to provide.
上記の目的を達成するため、本発明の内視鏡の湾曲装置
は、内視鏡の挿入部を形成する可撓管の先端側に屈曲自
在に形成された湾曲部と、上記湾曲部を屈曲させるため
に基端側から牽引操作される操作ワイヤと、上記可撓管
内で一４―記操作ワイヤをガイドするために上記操作ワ
イヤが進退自在に挿通された密巻コイルと、上記密巻コ
イルが曲げられてその全長が長くなったときに上記操作
ワイヤに生じる張力によって圧縮するように上記密巻コ
イルの途中又は端部に接続された弾性部材とを設けたこ
とを特徴とする。In order to achieve the above object, the endoscope bending device of the present invention includes a bendable part formed on the distal end side of a flexible tube forming the insertion section of the endoscope, and a bending part that bends the bending part. an operating wire that is pulled from the proximal end to guide the operating wire; a close-wound coil through which the operating wire is inserted so as to be able to move forward and backward in order to guide the operating wire within the flexible tube; and the close-wound coil. The invention is characterized in that an elastic member is provided in the middle or at the end of the tightly wound coil so as to be compressed by the tension generated in the operating wire when the operating wire is bent and its total length becomes longer.
可撓管が曲げられると、その内部の密巻コイルの全長が
長くなり、それによって操作ワイヤに加わる張力が増加
する。しかし、操作ワイヤに加わる張力が増加すると、
その張力によって弾性部材が圧縮されて、操作ワイヤに
加わる張力の増大が緩和される。When the flexible tube is bent, the overall length of the closely wound coil within it increases, thereby increasing the tension on the steering wire. However, as the tension on the operating wire increases,
The elastic member is compressed by the tension, and the increase in tension applied to the operating wire is alleviated.
図面を参照して実施例を説明する。 Examples will be described with reference to the drawings.
第１図は内視鏡を略示しており、挿入部を形成する可撓
管１の先端部分には屈曲自在な湾曲部２が連結され、可
撓管Ｉの基礎側には操作部３が連結されている。可撓管
Ｉの中間部分は、図示が省略されている。FIG. 1 schematically shows an endoscope, in which a flexible tube 1 forming an insertion section has a bendable bending section 2 connected to its distal end, and an operating section 3 on the base side of the flexible tube I. connected. The intermediate portion of the flexible tube I is not shown.
操作ワイヤ４は、湾曲部２内から可撓管１内を通って操
作部３内に引き通されており、操作部のフレーｌ＼３ａ
に回転自在に設けられたプーリ７に巻回されている。そ
して、プーリ７に連結されて操作部３から突設された湾
曲操作ノブ６を回動することにより、操作ワイヤ４が牽
引されて、湾曲部２を所望の角度だけ屈曲させることが
できるようになっている。５は、操作ワイヤ４を操作部
３内で連結接続するワイヤ継ぎである。The operating wire 4 is drawn from inside the bending part 2 through the flexible tube 1 and into the operating part 3, and is inserted into the operating part 3 from the inside of the operating part.
It is wound around a pulley 7 which is rotatably provided. By rotating the bending operation knob 6 connected to the pulley 7 and protruding from the operation part 3, the operation wire 4 is pulled, so that the bending part 2 can be bent by a desired angle. It has become. Reference numeral 5 denotes a wire joint that connects and connects the operating wires 4 within the operating section 3 .
湾曲部２の先端には、図示されていない光学繊維束や鉗
子チャンネルなど各種内蔵物の先端が固着された先端部
本体８が連結されている。A tip main body 8 is connected to the tip of the curved portion 2 to which the tips of various built-in items such as an optical fiber bundle and a forceps channel (not shown) are fixed.
湾曲部２は、リベット２１によって多数の節輪２２．２
３．・・・、２５を回動自在に連結して構成されている
。そして、先端の節輪２２には先端部本体８が連結され
、基端の節輪２５には可撓管１が連結されている。操作
ワイヤ４の先端は、先端の節輪２２の内面に取着されて
いる。The curved portion 2 has a large number of joint rings 22.2 by the rivets 21.
3. ..., 25 are rotatably connected. The distal end main body 8 is connected to the nodal ring 22 at the distal end, and the flexible tube 1 is connected to the nodal ring 25 at the proximal end. The tip of the operating wire 4 is attached to the inner surface of the node ring 22 at the tip.
操作ワイヤ４は、可撓管１内では、ステンレス鋼線を密
着巻きした可撓性の密巻コイル９内に進退自在に挿通さ
れている。密巻コイル９は可撓管１内に挿通されていて
、その基端側は操作部３のフレーム３ａに固定され、先
端側は、可撓管１と湾曲部２との接続部の内面に固着さ
れている。Inside the flexible tube 1, the operating wire 4 is inserted into a flexible close-wound coil 9 made of tightly wound stainless steel wire so as to be freely movable forward and backward. The tightly wound coil 9 is inserted into the flexible tube 1, and its proximal end is fixed to the frame 3a of the operating section 3, and its distal end is attached to the inner surface of the connection between the flexible tube 1 and the bending section 2. It is fixed.
密巻コイル９は基端部近傍において間隔をあけて分割さ
れており、その部分に、コイルスプリング１０が接続固
着されている。The tightly wound coil 9 is divided into parts at intervals near the base end, and a coil spring 10 is connected and fixed to the parts.
このコイルスプリングｌＯは、バネ定数が大きくて腰が
強く、コイルスプリング１０の両端部の内周に密巻コイ
ル９の分割端の外周が銀ロー付などにより固着されてい
る。したがって、通常の湾曲操作を行うために操作ワイ
ヤ４が操作部３側へ牽引された程度では、コイルスプリ
ング１０はほとんど縮まない。This coil spring 10 has a large spring constant and is strong, and the outer periphery of the divided end of the tightly wound coil 9 is fixed to the inner periphery of both ends of the coil spring 10 by silver brazing or the like. Therefore, even when the operating wire 4 is pulled toward the operating section 3 to perform a normal bending operation, the coil spring 10 hardly contracts.
しかし、挿入部１がループ状態になる等して、密巻コイ
ル９が大きく曲げられたときには、密巻コイル９が伸び
ることによって操作ワイヤ４に加わる張力が増大し、そ
の張力によってコイルスプリングＩＯが圧縮され、弾性
変形して縮む。However, when the tightly wound coil 9 is bent significantly due to the insertion portion 1 becoming in a loop state, the tension applied to the operating wire 4 increases as the tightly wound coil 9 stretches, and this tension causes the coil spring IO to It is compressed and elastically deforms and shrinks.
この時には、操作ワイヤ４の張力とコイルスプリングＩ
Ｏの圧縮に対する反発力とがつり合う状態になり、操作
ワイヤ４に加わる張力は、コイルスプリング１０か無い
場合に比べて、大幅に小さくなる。At this time, the tension of the operating wire 4 and the coil spring I
The repulsive force against the compression of O is balanced, and the tension applied to the operating wire 4 becomes significantly smaller than when there is no coil spring 10.
なお、第１図には、密巻コイル９は１本以外図示が省略
されているが、他のずべての密巻コイル９にもコイルス
プリング■０を接続することができる。Although all but one of the tightly wound coils 9 are not shown in FIG. 1, the coil spring 0 can be connected to all other tightly wound coils 9.
第２図は、本発明の第２の実施例であり、コイルスプリ
ング１０の部分だけを示している。この実施例の場合に
は、コイルスプリング１０を予めある程度圧縮した状態
で両端ストッパ１８．１９の間に挟んで取り付けである
。コイルスプリング１０と密巻コイル９とは銀ロー付な
どによって固着して接続されている。FIG. 2 shows a second embodiment of the present invention, in which only the coil spring 10 is shown. In the case of this embodiment, the coil spring 10 is compressed to some extent in advance and is mounted between stoppers 18 and 19 at both ends. The coil spring 10 and the tightly wound coil 9 are firmly connected by silver brazing or the like.
したがってこの場合には、コイルスプリングＩＯは一定
以上の圧縮力が加わるまでは全く変形せず、一定以上の
圧縮力が加わるとその圧縮力に応じて縮み、通常の湾曲
操作時の縮みを完全にゼロにすることが可能となる。Therefore, in this case, the coil spring IO will not deform at all until a compressive force above a certain level is applied, and when a compressive force above a certain level is applied, it will contract according to the compressive force, completely eliminating the shrinkage during normal bending operations. It is possible to set it to zero.
なお、本発明は上記実施例に限定されるものではなく、
例えば、コイルスプリングに代えてどのような弾性部材
を用いてもよく、また、弾性部材は、密巻コイルの途中
又は端部のどの部分に設けてもよい。Note that the present invention is not limited to the above embodiments,
For example, any elastic member may be used in place of the coil spring, and the elastic member may be provided in the middle or at any end of the tightly wound coil.
本発明の内視鏡の湾曲装置によれば、可撓管がループ状
に曲げられる等して密巻コイルの長さが伸びたときには
、操作ワイヤに加わる張力の増加によって弾性部材が圧
縮されて縮み、それによって操作ワイヤに加わる張力の
増大が緩和されるので、湾曲操作が操作に支障をきたす
ほど重くなったり、湾曲部の表面がごつごつになるよう
な変形が発生しなくなり、操作性、耐久性及び安全性が
大幅に向上する優れた効果を有する。According to the endoscope bending device of the present invention, when the length of the tightly wound coil is extended by bending the flexible tube into a loop shape, etc., the elastic member is compressed by the increase in tension applied to the operating wire. This reduces the increase in tension applied to the operating wire, which prevents the bending operation from becoming so heavy that it interferes with the operation, and from causing deformation such as the surface of the bending part becoming rough, improving operability and durability. It has an excellent effect of significantly improving safety and safety.
第１図は、第１の実施例の側面略示図、第２図は、第２
の実施例の部分側面断面図である。
■・・・可撓管、２・・・高曲部、４・・・操作ワイヤ
、９・・・密巻コイル、ＩＯ・・・コイルスプリング。FIG. 1 is a schematic side view of the first embodiment, and FIG. 2 is a schematic side view of the second embodiment.
FIG. 3 is a partial side cross-sectional view of an embodiment of the invention. ■...Flexible tube, 2...High bending part, 4...Operation wire, 9...Tightly wound coil, IO...Coil spring.
Claims (1)
形成された湾曲部と、 上記湾曲部を屈曲させるために基端側から牽引操作され
る操作ワイヤと、 上記可撓管内で上記操作ワイヤをガイドするために上記
操作ワイヤが進退自在に挿通された密巻コイルと、 上記密巻コイルが曲げられてその全長が長くなったとき
に上記操作ワイヤに生じる張力によって圧縮されるよう
に上記密巻コイルの途中又は端部に接続された弾性部材
とを設けたことを 特徴とする内視鏡の湾曲装置。[Scope of Claims] A bendable portion formed on the distal end side of a flexible tube that forms the insertion portion of the endoscope, and a manipulation wire that is pulled and operated from the proximal end side to bend the curved portion. and a close-wound coil into which the operating wire is inserted to be able to move forward and backward in order to guide the operating wire within the flexible tube; A bending device for an endoscope, comprising an elastic member connected to the middle or end of the tightly wound coil so as to be compressed by the generated tension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2172424A JPH0458933A (en) | 1990-06-28 | 1990-06-28 | Curvature device for endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2172424A JPH0458933A (en) | 1990-06-28 | 1990-06-28 | Curvature device for endoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0458933A true JPH0458933A (en) | 1992-02-25 |
Family
ID=15941717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2172424A Pending JPH0458933A (en) | 1990-06-28 | 1990-06-28 | Curvature device for endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0458933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9202653B2 (en) | 2013-02-27 | 2015-12-01 | Fujitsu Component Limited | Electromagnetic relay |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63115532A (en) * | 1986-05-02 | 1988-05-20 | オリンパス光学工業株式会社 | Endoscope |
| JPS63176401U (en) * | 1987-05-08 | 1988-11-16 | ||
| JPH0159103U (en) * | 1987-10-08 | 1989-04-13 |
-
1990
- 1990-06-28 JP JP2172424A patent/JPH0458933A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63115532A (en) * | 1986-05-02 | 1988-05-20 | オリンパス光学工業株式会社 | Endoscope |
| JPS63176401U (en) * | 1987-05-08 | 1988-11-16 | ||
| JPH0159103U (en) * | 1987-10-08 | 1989-04-13 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9202653B2 (en) | 2013-02-27 | 2015-12-01 | Fujitsu Component Limited | Electromagnetic relay |
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