JP2002272676A - Operating device for curving endoscope and method of assembling it - Google Patents

Operating device for curving endoscope and method of assembling it

Info

Publication number
JP2002272676A
JP2002272676A JP2001075602A JP2001075602A JP2002272676A JP 2002272676 A JP2002272676 A JP 2002272676A JP 2001075602 A JP2001075602 A JP 2001075602A JP 2001075602 A JP2001075602 A JP 2001075602A JP 2002272676 A JP2002272676 A JP 2002272676A
Authority
JP
Japan
Prior art keywords
wire
bending
drive
drive pulley
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.)
Granted
Application number
JP2001075602A
Other languages
Japanese (ja)
Other versions
JP4629252B2 (en
Inventor
Yoshinori Fujii
喜則 藤井
Shizuharu Miura
静春 三浦
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 JP2001075602A priority Critical patent/JP4629252B2/en
Publication of JP2002272676A publication Critical patent/JP2002272676A/en
Application granted granted Critical
Publication of JP4629252B2 publication Critical patent/JP4629252B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an operating device for curving an endoscope having a structure in which drive wires for driving and towing operation wires for bending a curved part are wound on a drive pulley, without the bending angle of the curved part being reduced even after the repetition of curving operation; and a method of assembling the operating device. SOLUTION: These drive wires 12U and 12D are assembled to a drive pulley 11, with the cross-sectional shapes of the wires crushed flat along the radial direction of the drive pulley 11.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は内視鏡の湾曲操作
装置及びその組立方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope bending operation device and an assembling method thereof.

【0002】[0002]

【従来の技術】内視鏡においては一般に、挿入部の先端
付近に形成された湾曲部を、挿入部の基端に連結された
操作部からの遠隔操作によって任意に屈曲させることが
できるようになっている。
2. Description of the Related Art Generally, in an endoscope, a curved portion formed near a distal end of an insertion portion can be flexibly arbitrarily bent by a remote operation from an operation portion connected to a base end of the insertion portion. Has become.

【0003】湾曲部を屈曲させるための遠隔操作は操作
ワイヤを牽引して行われるのが普通であり、操作部に回
転自在に配置された駆動プーリに、操作ワイヤを牽引駆
動するための駆動ワイヤを巻回した機構が広く用いられ
ている。
[0003] Remote operation for bending a bending portion is usually performed by pulling an operation wire, and a drive pulley rotatably disposed on the operation portion is provided with a drive wire for pulling and driving the operation wire. Is widely used.

【0004】[0004]

【発明が解決しようとする課題】上述のような内視鏡の
湾曲操作装置において、湾曲部を屈曲させるために駆動
プーリを回転させると、駆動ワイヤは大きな張力がかか
った状態で駆動プーリの溝底面に圧接される。
In the bending operation device for an endoscope as described above, when the driving pulley is rotated to bend the bending portion, the driving wire is subjected to the groove of the driving pulley under a large tension. It is pressed against the bottom.

【0005】そのため、湾曲操作が繰り返されているう
ちに、多数の金属細線を撚って形成された撚り線からな
る駆動ワイヤは、次第に駆動プーリの径方向に潰れた偏
平形状になってくる。
Therefore, while the bending operation is being repeated, the drive wire formed of a stranded wire formed by twisting a large number of fine metal wires gradually becomes flat in the radial direction of the drive pulley.

【0006】すると、駆動プーリの回転中心から駆動ワ
イヤの軸線位置までの距離が小さくなるので、操作ワイ
ヤの牽引量が減少して湾曲部の屈曲角度が減衰する現象
が発生する。
Then, the distance from the center of rotation of the driving pulley to the axial position of the driving wire is reduced, so that the amount of pulling of the operating wire is reduced and the bending angle of the bending portion is attenuated.

【0007】特に、操作ワイヤを牽引する状態に駆動プ
ーリが回転したとき、駆動ワイヤが駆動プーリの径方向
に重なり合って巻回された状態になる機構では、そのよ
うな湾曲部の屈曲角度の減衰が著しいものになる。
[0007] In particular, in a mechanism in which the drive wire is wound in a state of being overlapped and wound in the radial direction of the drive pulley when the drive pulley rotates to pull the operation wire, the bending angle of such a curved portion is attenuated. Becomes remarkable.

【0008】そこで本発明は、湾曲部を屈曲させる操作
ワイヤを牽引駆動するための駆動ワイヤが駆動プーリに
巻回された構造のものにおいて、湾曲操作が繰り返され
ても湾曲部の屈曲角度が減衰しない内視鏡の湾曲操作装
置及びその組立方法を提供することを目的とする。
Accordingly, the present invention is directed to a structure in which a drive wire for pulling and driving an operation wire for bending a bending portion is wound around a driving pulley, and the bending angle of the bending portion is attenuated even if the bending operation is repeated. An object of the present invention is to provide an endoscope bending operation device and an assembling method thereof.

【0009】[0009]

【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡の湾曲操作装置は、内視鏡の挿入部
に形成された湾曲部を屈曲させる操作ワイヤを牽引駆動
するための駆動ワイヤが、挿入部の基端に連結された操
作部に回転自在に配置された駆動プーリに巻回された内
視鏡の湾曲操作装置において、駆動ワイヤの断面形状
が、駆動プーリの径方向に潰れた偏平形状に形成されて
駆動プーリに組み付けられているものである。
To achieve the above object, a bending operation device for an endoscope according to the present invention pulls and drives an operation wire for bending a bending portion formed in an insertion portion of the endoscope. In a bending operation device of an endoscope in which a driving wire for winding is wound around a driving pulley rotatably arranged on an operating portion connected to a base end of an insertion portion, a cross-sectional shape of the driving wire is It is formed in a flat shape that is crushed in the radial direction and is assembled to the drive pulley.

【0010】なお、操作ワイヤを牽引する状態に駆動プ
ーリが回転したとき、駆動ワイヤが駆動プーリの径方向
に重なり合って巻回された状態になるものでは、湾曲部
の屈曲角度減衰の防止効果が大きい。
When the drive pulley is rotated to pull the operation wire, the drive wire is wound in a state of being overlapped and wound in the radial direction of the drive pulley. large.

【0011】また、本発明の内視鏡の湾曲操作装置の組
立方法は、内視鏡の挿入部に形成された湾曲部を屈曲さ
せる操作ワイヤを牽引駆動するための駆動ワイヤが、挿
入部の基端に連結された操作部に回転自在に配置された
駆動プーリに巻回された内視鏡の湾曲操作装置の組立方
法において、駆動ワイヤを、駆動プーリの径方向に潰れ
た偏平形状に形成して駆動プーリに組み付けるようにし
たものである。
Further, in the method of assembling the bending operation device for an endoscope according to the present invention, the driving wire for pulling and driving the operation wire for bending the bending portion formed in the insertion portion of the endoscope is provided. In a method for assembling a bending operation device for an endoscope wound around a drive pulley rotatably disposed on an operation unit connected to a base end, a drive wire is formed into a flat shape that is crushed in a radial direction of the drive pulley. Then, it is assembled to the drive pulley.

【0012】そして、操作ワイヤを牽引する状態に駆動
プーリが回転したとき、駆動ワイヤが駆動プーリの径方
向に重なり合って巻回された状態になるものでは、湾曲
部の屈曲角度減衰の防止効果が大きい。
When the drive pulley rotates to pull the operation wire, the drive wire is wound in a state of being overlapped and wound in the radial direction of the drive pulley. large.

【0013】[0013]

【発明の実施の形態】図面を参照して本発明の実施例を
説明する。図4は、本発明の実施例の内視鏡を示してお
り、基端が操作部1に連結された挿入部2の先端部分
に、操作部1からの遠隔操作によって屈曲する湾曲部3
が形成され、対物光学系等を内蔵した先端部本体4が湾
曲部3の先端に連結されている。
Embodiments of the present invention will be described with reference to the drawings. FIG. 4 shows an endoscope according to an embodiment of the present invention, in which a bending portion 3 which is bent at a distal end portion of an insertion portion 2 whose base end is connected to the operation portion 1 by remote operation from the operation portion 1.
Is formed, and a distal end main body 4 containing an objective optical system and the like is connected to the distal end of the bending portion 3.

【0014】なお、この実施例においては、説明が容易
なように、湾曲部3が上(U)方向と下(D)方向だけ
に屈曲するものになっているが、本発明は、湾曲部3が
上下左右全方向に屈曲するものにも適用することができ
る。
In this embodiment, the bending portion 3 is bent only in the upward (U) direction and the downward (D) direction for easy explanation. The present invention can also be applied to a device in which 3 is bent in all directions, up, down, left, and right.

【0015】操作部1には、先端が湾曲部3に連結され
た一対の操作ワイヤ5U,5Dを牽引操作するための湾
曲操作機構10が配置されており、その湾曲操作機構1
0を操作するための湾曲操作ノブ6が、操作部1の外面
に配置されている。
A bending operation mechanism 10 for pulling a pair of operation wires 5U and 5D whose distal ends are connected to the bending section 3 is disposed on the operation section 1.
A bending operation knob 6 for operating the operation unit 0 is disposed on an outer surface of the operation unit 1.

【0016】挿入部2内において操作ワイヤ5U,5D
をガイドする可撓性ガイド管7の基端部分は操作部1内
のフレームに固定され、可撓性ガイド管7の図示されて
いない先端部分は挿入部2の先端に固定されている。
The operation wires 5U and 5D in the insertion portion 2
A base end portion of a flexible guide tube 7 for guiding the guide is fixed to a frame in the operation section 1, and a not-shown distal end portion of the flexible guide tube 7 is fixed to a tip end of the insertion section 2.

【0017】湾曲操作機構10として、湾曲操作ノブ6
に連結された駆動プーリ11が、湾曲操作ノブ6と共に
回転するように操作部1内に配置されており、操作ワイ
ヤ5U,5Dを牽引駆動するための駆動ワイヤ12U,
12Dが駆動プーリ11に巻回されている。
As the bending operation mechanism 10, the bending operation knob 6
Is arranged in the operation unit 1 so as to rotate together with the bending operation knob 6, and a driving wire 12U for pulling and driving the operation wires 5U and 5D.
12D is wound around the drive pulley 11.

【0018】操作ワイヤ5U,5Dと駆動ワイヤ12
U,12Dとは、ワイヤ連結部材13を介して連結され
ており、ワイヤ連結部材13が、緩み側になる操作ワイ
ヤ5U,5Dの弛みを吸収するための弛緩除去器として
機能するものであってもよい。
Operation wires 5U, 5D and drive wires 12
U and 12D are connected via a wire connecting member 13, and the wire connecting member 13 functions as a slack remover for absorbing the slack of the operation wires 5U and 5D that are on the slack side. Is also good.

【0019】このような構成により、湾曲操作ノブ6を
回転操作するとそれによって駆動プーリ11が回転し
て、駆動ワイヤ12U,12Dの一方によって操作ワイ
ヤ5U,5Dの一方が牽引され、他方は駆動プーリ11
から先端側に送り出されて、湾曲部3が屈曲する。
With such a configuration, when the bending operation knob 6 is rotated, the driving pulley 11 is rotated thereby, one of the driving wires 12U, 12D pulls one of the operation wires 5U, 5D, and the other is the driving pulley. 11
Is sent out to the tip side, and the bending portion 3 is bent.

【0020】図1は、駆動プーリ11の軸線位置におけ
る断面を示しており、上方向湾曲用駆動ワイヤ12Uと
下方向湾曲用駆動ワイヤ12Dとが巻回される上方向湾
曲用プーリ溝14Uと下方向湾曲用プーリ溝14Dと
が、互いに独立して、駆動プーリ11の外周面位置に並
列に並んで形成されている。
FIG. 1 shows a cross section of the drive pulley 11 at the axial position. The pulley groove 14U for upward bending around which the drive wire 12U for upward bending and the drive wire 12D for downward bending are wound, and the lower part thereof. The direction bending pulley groove 14 </ b> D is formed independently and in parallel at the outer peripheral surface position of the drive pulley 11.

【0021】上方向湾曲用駆動ワイヤ12Uと下方向湾
曲用駆動ワイヤ12Dは、共に基端が駆動プーリ11に
固定されていて、駆動プーリ11の径方向に2〜3重に
重なりあって巻回されてから、各々の先端がワイヤ連結
部材13の方向に引き出されている。
The drive wire 12U for upward bending and the drive wire 12D for downward bending are both fixed at their base ends to the drive pulley 11, and are wound around the drive pulley 11 in the radial direction of the drive pulley 11 so as to overlap two to three times. After that, each tip is pulled out in the direction of the wire connecting member 13.

【0022】図2は、駆動ワイヤ12U,12Dとして
用いられるワイヤの素材である素材ワイヤ12′の断面
を示しており、例えばステンレス鋼線材からなる素線を
7×7本撚りした撚り線が用いられている。
FIG. 2 shows a cross section of a material wire 12 'which is a material of the wires used as the drive wires 12U and 12D. For example, a 7 × 7 twisted strand of a stainless steel wire is used. Have been.

【0023】そして、その素材ワイヤ12′が、内視鏡
の製造工程において駆動プーリ11に組み付けられる前
(又は、操作ワイヤ5U,5Dと連結される前)に、図
3に示されるように偏平な断面形状に潰され、図1に図
示されるように、偏平な駆動ワイヤ12U,12Dが駆
動プーリ11の径方向に潰れた状態になるようにプーリ
溝14U,14D内に巻回されて組み付けられている。
Before the material wire 12 'is assembled to the drive pulley 11 in the manufacturing process of the endoscope (or before it is connected to the operation wires 5U and 5D), the material wire 12' is flattened as shown in FIG. As shown in FIG. 1, the flat drive wires 12U and 12D are wound in the pulley grooves 14U and 14D so as to be crushed in the radial direction of the drive pulley 11, and assembled. Have been.

【0024】このように、駆動ワイヤ12U,12Dが
駆動プーリ11の径方向に潰れた偏平形状にされて駆動
プーリ11に組み付けられているので、湾曲操作が繰り
返された後でも駆動ワイヤ12U,12Dの断面形状が
ほとんど変化しない。
As described above, since the drive wires 12U and 12D are formed into a flat shape which is crushed in the radial direction of the drive pulley 11, and are assembled to the drive pulley 11, the drive wires 12U and 12D are provided even after the bending operation is repeated. Hardly changes its cross-sectional shape.

【0025】その結果、駆動プーリ11の回転角度に対
する駆動ワイヤ12U,12Dの牽引量(即ち操作ワイ
ヤ5U,5Dの牽引量)が変化せず、したがって湾曲部
3の屈曲角度が減衰しない。
As a result, the amount of pulling of the driving wires 12U and 12D with respect to the rotation angle of the driving pulley 11 (that is, the amount of pulling of the operation wires 5U and 5D) does not change, and therefore, the bending angle of the bending portion 3 does not attenuate.

【0026】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、駆動ワイヤ12U,12Dを形成
するワイヤはどのようなタイプの撚り線であってもよ
く、駆動ワイヤ12U,12Dが操作ワイヤ5U,5D
と一つながりに構成されていても差し支えない。
The present invention is not limited to the above embodiment. For example, the wires forming the drive wires 12U, 12D may be any type of stranded wires, and the drive wires 12U, 12D Operation wire 5U, 5D
It does not matter if it is configured as one connection.

【0027】また本発明は、駆動ワイヤ12U,12D
が駆動プーリ11に重なり合わないように一重に巻回さ
れたものでも効果が得られ、操作ワイヤ5U,5Dを牽
引する状態に駆動プーリ11が回転したとき、駆動ワイ
ヤ12U,12Dが駆動プーリ11の径方向に重なり合
って巻回された状態になるものであれば、湾曲部3の屈
曲角度減衰防止上大きな効果が得られる。
The present invention also relates to the driving wires 12U, 12D
The effect can be obtained even when the drive pulley 11 is rotated to pull the operation wires 5U and 5D when the drive wires 12U and 12D are pulled so as not to overlap the drive pulley 11. As long as it is wound in a state of overlapping in the radial direction, a great effect can be obtained in preventing the bending angle of the bending portion 3 from being attenuated.

【0028】[0028]

【発明の効果】本発明によれば、湾曲部を屈曲させる操
作ワイヤを牽引駆動するための駆動ワイヤが駆動プーリ
に巻回された構造のものにおいて、駆動ワイヤの断面形
状が、駆動プーリの径方向に潰れた偏平形状にされて駆
動プーリに組み付けられていることにより、湾曲操作が
繰り返されても、駆動プーリの回転角度に対する駆動ワ
イヤの牽引量が変化せず、したがって湾曲部の屈曲角度
が減衰しない。
According to the present invention, in a structure in which a driving wire for pulling and driving an operation wire for bending a bending portion is wound around a driving pulley, the cross-sectional shape of the driving wire is the diameter of the driving pulley. By being assembled into the drive pulley in a flat shape that is crushed in the direction, even if the bending operation is repeated, the amount of pulling of the drive wire with respect to the rotation angle of the drive pulley does not change, and therefore, the bending angle of the bending portion is reduced. Does not decay.

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

【図1】本発明の実施例の内視鏡の湾曲操作装置の駆動
プーリの軸線位置における断面図である。
FIG. 1 is a cross-sectional view at an axial position of a drive pulley of a bending operation device for an endoscope according to an embodiment of the present invention.

【図2】本発明の実施例の駆動ワイヤの素材ワイヤの軸
線に垂直な断面形状を示す断面図である。
FIG. 2 is a cross-sectional view showing a cross-sectional shape perpendicular to an axis of a material wire of a driving wire according to the embodiment of the present invention.

【図3】本発明の実施例の駆動ワイヤの軸線に垂直な断
面形状を示す断面図である。
FIG. 3 is a cross-sectional view showing a cross-sectional shape perpendicular to an axis of a driving wire according to the embodiment of the present invention.

【図4】本発明の実施例の内視鏡の全体構成を示す外観
図である。
FIG. 4 is an external view showing an entire configuration of the endoscope according to the embodiment of the present invention.

【符号の説明】[Explanation of symbols]

3 湾曲部 5U,5D 操作ワイヤ 6 湾曲操作ノブ 10 湾曲操作機構 11 駆動プーリ 12U,12D 駆動ワイヤ 12′ 素材ワイヤ Reference Signs List 3 Bending part 5U, 5D operation wire 6 Bending operation knob 10 Bending operation mechanism 11 Drive pulley 12U, 12D Drive wire 12 'Material wire

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】内視鏡の挿入部に形成された湾曲部を屈曲
させる操作ワイヤを牽引駆動するための駆動ワイヤが、
上記挿入部の基端に連結された操作部に回転自在に配置
された駆動プーリに巻回された内視鏡の湾曲操作装置に
おいて、 上記駆動ワイヤの断面形状が、上記駆動プーリの径方向
に潰れた偏平形状に形成されて上記駆動プーリに組み付
けられていることを特徴とする内視鏡の湾曲操作装置。
1. A drive wire for pulling and driving an operation wire for bending a curved portion formed in an insertion portion of an endoscope,
In a bending operation device for an endoscope wound around a drive pulley rotatably disposed on an operation portion connected to a base end of the insertion portion, a cross-sectional shape of the drive wire may be in a radial direction of the drive pulley. A bending operation device for an endoscope, wherein the bending operation device is formed in a crushed flat shape and assembled to the drive pulley.
【請求項2】上記操作ワイヤを牽引する状態に上記駆動
プーリが回転したとき、上記駆動ワイヤが上記駆動プー
リの径方向に重なり合って巻回された状態になる請求項
1記載の内視鏡の湾曲操作装置。
2. The endoscope according to claim 1, wherein, when the drive pulley is rotated to pull the operation wire, the drive wire is wound so as to overlap with the drive pulley in the radial direction. Bending operation device.
【請求項3】内視鏡の挿入部に形成された湾曲部を屈曲
させる操作ワイヤを牽引駆動するための駆動ワイヤが、
上記挿入部の基端に連結された操作部に回転自在に配置
された駆動プーリに巻回された内視鏡の湾曲操作装置の
組立方法において、 上記駆動ワイヤを、上記駆動プーリの径方向に潰れた偏
平形状に形成して上記駆動プーリに組み付けることを特
徴とする内視鏡の湾曲操作装置の組立方法。
3. A drive wire for pulling and driving an operation wire for bending a curved portion formed in an insertion portion of an endoscope,
In an assembling method of a bending operation device for an endoscope wound around a drive pulley rotatably disposed on an operation portion connected to a base end of the insertion portion, the drive wire is provided in a radial direction of the drive pulley. A method of assembling a bending operation device for an endoscope, wherein the bending operation device is formed into a flattened shape and assembled to the driving pulley.
【請求項4】上記操作ワイヤを牽引する状態に上記駆動
プーリが回転したとき、上記駆動ワイヤが上記駆動プー
リの径方向に重なり合って巻回された状態になる請求項
3記載の内視鏡の湾曲操作装置の組立方法。
4. The endoscope according to claim 3, wherein when the drive pulley is rotated to pull the operation wire, the drive wire is wound around the drive pulley so as to overlap in the radial direction. A method of assembling a bending operation device.
JP2001075602A 2001-03-16 2001-03-16 Method for assembling endoscope bending operation device Expired - Fee Related JP4629252B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230837A (en) * 2005-02-28 2006-09-07 Pentax Corp Curving device of endoscope
WO2015115504A1 (en) * 2014-01-29 2015-08-06 住友ベークライト株式会社 Medical device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57170702U (en) * 1981-04-21 1982-10-27
JPS57182401U (en) * 1981-05-13 1982-11-19
JPS61118712A (en) * 1984-11-14 1986-06-06 Olympus Optical Co Ltd Endoscope

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57170702U (en) * 1981-04-21 1982-10-27
JPS57182401U (en) * 1981-05-13 1982-11-19
JPS61118712A (en) * 1984-11-14 1986-06-06 Olympus Optical Co Ltd Endoscope

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230837A (en) * 2005-02-28 2006-09-07 Pentax Corp Curving device of endoscope
WO2015115504A1 (en) * 2014-01-29 2015-08-06 住友ベークライト株式会社 Medical device
JP2015163187A (en) * 2014-01-29 2015-09-10 住友ベークライト株式会社 Medical instrument
US10737065B2 (en) 2014-01-29 2020-08-11 Sumitomo Bakelite Co., Ltd. Medical device

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