JPH11267092A - Insertion portion for endoscope - Google Patents

Insertion portion for endoscope

Info

Publication number
JPH11267092A
JPH11267092A JP10072966A JP7296698A JPH11267092A JP H11267092 A JPH11267092 A JP H11267092A JP 10072966 A JP10072966 A JP 10072966A JP 7296698 A JP7296698 A JP 7296698A JP H11267092 A JPH11267092 A JP H11267092A
Authority
JP
Japan
Prior art keywords
flexible tube
pipe
endoscope
flexible
flexibility
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
JP10072966A
Other languages
Japanese (ja)
Other versions
JP3992822B2 (en
Inventor
Kenichi Ohara
健一 大原
Yoshinori Fujii
喜則 藤井
Masaru Takeshige
勝 竹重
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 JP07296698A priority Critical patent/JP3992822B2/en
Publication of JPH11267092A publication Critical patent/JPH11267092A/en
Application granted granted Critical
Publication of JP3992822B2 publication Critical patent/JP3992822B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/00078—Insertion part of the endoscope body with stiffening means

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an insertion portion for an endoscope in which flexibility of a flexible tube is easily and smoothly changed in the middle without changing thickness or hardness of outer skin of the flexible tube. SOLUTION: In an insertion portion for an endoscope in which plural wire guides 24 comprising tight winding coil pipes for inserting and guiding operation wires 23 are inserted and disposed in a flexible tube 2 to enclose the insertion portion, flexibility restricting pipes 25 comprising super-epastic alloy pipe members of different thickness are put around the respective wire guides 24 in a range from a base end position of the flexible tube 2 to a middle position in parts of at least two wire guides 24 of the plural wire guides 24 positioned in the flexible tube 2.

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、体腔内等に挿入
される内視鏡の挿入部に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope insertion portion to be inserted into a body cavity or the like.

【０００２】[0002]

【従来の技術】いわゆる軟性内視鏡の挿入部は、光学繊
維束等の内蔵物を外装可撓管内に挿通配置して構成され
ているが、その先端寄りの部分は体腔内臓器の形状に沿
って比較的自由に曲がるように柔軟に形成し、手元側の
部分は操作者が行う微妙な押し引き動作等が先端側に伝
達されるように硬めに形成する必要がある。2. Description of the Related Art The insertion portion of a so-called flexible endoscope is constructed by inserting and arranging a built-in member such as an optical fiber bundle in an outer flexible tube. It is necessary to be flexible so as to bend relatively freely along the way, and to make the hand-side portion stiff so that a delicate push-pull operation or the like performed by the operator is transmitted to the tip side.

【０００３】そこで従来は、外装可撓管の最外層の合成
樹脂外皮の厚さや硬度等を位置によって変化させること
により、外装可撓管自体の可撓性を途中で変化させてい
た。[0003] Conventionally, the flexibility of the exterior flexible tube itself has been changed on the way by changing the thickness, hardness, and the like of the outermost layer of the synthetic resin outer sheath of the exterior flexible tube depending on the position.

【０００４】[0004]

【発明が解決しようとする課題】外装可撓管の最外層の
合成樹脂外皮は、一般に押し出し成形によって形成され
るが、その厚さや硬度をいちいち途中で変化させる製法
では、外装可撓管の製造に著しい時間とコストがかかっ
てしまう。また、そのように途中で成形条件を変化させ
ると、成形条件の変動に起因する製品毎の可撓性のバラ
ツキが発生する場合が少なくない。The outermost layer of the synthetic resin outer sheath of the outer flexible tube is generally formed by extrusion molding. However, in a manufacturing method in which the thickness and hardness are changed one by one, the outer flexible tube is manufactured. Requires significant time and cost. In addition, when the molding conditions are changed in the middle in such a way, there are not a few cases where the flexibility of each product is varied due to the fluctuation of the molding conditions.

【０００５】そこで本発明は、可撓管の外皮の厚さや硬
度を変化させることなく、途中で可撓性を容易かつ滑ら
かに変化させた内視鏡の挿入部を提供することを目的と
する。Accordingly, an object of the present invention is to provide an endoscope insertion portion in which flexibility is easily and smoothly changed on the way without changing the thickness and hardness of the outer skin of a flexible tube. .

【０００６】[0006]

【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡の挿入部は、挿入部を外装する可撓
管内に、操作ワイヤを挿通して案内するための密着巻き
コイルパイプからなる複数のワイヤガイドが挿通配置さ
れた内視鏡の挿入部において、上記複数のワイヤガイド
の中の少なくとも二つのワイヤガイドの上記可撓管内に
位置する部分のうち、上記可撓管の基端位置から中間位
置までの範囲に、ワイヤガイドによってあい異なる肉厚
の超弾性合金製のパイプ材からなる可撓性抑制用パイプ
を被嵌したことを特徴とする。In order to achieve the above object, an insertion portion of an endoscope according to the present invention is provided with a tight winding for inserting and guiding an operation wire into a flexible tube which covers the insertion portion. In the insertion portion of the endoscope in which the plurality of wire guides made of coil pipes are inserted and arranged, the flexible tube of at least two of the plurality of wire guides is located in the flexible tube. In the range from the base end position to the intermediate position, a flexible pipe made of a pipe material made of a superelastic alloy having a different thickness is fitted by a wire guide.

【０００７】なお、上記可撓管内において周囲の空間に
余裕のあるワイヤガイドには肉厚の厚い可撓性抑制用パ
イプが被嵌され、周囲の空間に余裕の少ないワイヤガイ
ドには肉厚の薄い可撓性抑制用パイプが被嵌されていて
もよい。そして、上記複数の可撓性抑制用パイプが、互
いの先端位置をずらして各ワイヤガイドに被嵌されてい
てもよい。[0007] In the flexible tube, a thick-walled flexibility suppressing pipe is fitted over a wire guide having a sufficient space in the surrounding space, and a thick-walled wire guide is fitted into the wire guide having a small space in the surrounding space. A thin flexible restraining pipe may be fitted. Then, the plurality of pipes for suppressing flexibility may be fitted to the respective wire guides while shifting the tip positions of the pipes.

【０００８】また、上記可撓性抑制用パイプが、基端側
だけで上記ワイヤガイドに対して固定されていてもよ
く、或いは、上記可撓性抑制用パイプが、両端において
上記ワイヤガイドに対して固定されていてもよい。[0008] The flexibility suppressing pipe may be fixed to the wire guide only at the base end side, or the flexibility suppressing pipe may be fixed at both ends to the wire guide. May be fixed.

【０００９】[0009]

【発明の実施の形態】図面を参照して本発明の実施の形
態を説明する。図２は内視鏡を示しており、体腔内等に
挿入される挿入部は、可撓管２によって外装された軟性
部分の先端に、操作部１からの遠隔操作によって屈曲す
る湾曲部３が連結され、その湾曲部３の先端に、対物光
学系等を内蔵した先端部本体４が連結されて構成されて
いる。Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows an endoscope, in which an insertion portion to be inserted into a body cavity or the like has a bending portion 3 which is bent by a remote operation from the operation portion 1 at a distal end of a flexible portion covered by a flexible tube 2. A distal end main body 4 containing an objective optical system and the like is connected to the distal end of the curved portion 3.

【００１０】先端部本体４の表面には、対物光学系に観
察像を導入する観察窓５、観察視野に向けて照明光を射
出する照明窓６、処置具挿通チャンネル出口７ａ、及び
図示が省略されている送気送水ノズル等が配置されてい
る。On the surface of the distal end body 4, an observation window 5 for introducing an observation image into the objective optical system, an illumination window 6 for emitting illumination light toward an observation field, a treatment instrument insertion channel outlet 7a, and illustration are omitted. An air supply / water supply nozzle and the like are arranged.

【００１１】可撓管２の基端に連結された操作部１に
は、湾曲部３を屈曲操作するための湾曲操作ノブ８ａ，
８ｂが配置されており、上下方向用湾曲操作ノブ８ａで
上下方向のいずれかの操作ワイヤを牽引操作し、左右方
向用湾曲操作ノブ８ｂで左右方向のいずれかの操作ワイ
ヤを牽引操作することにより、湾曲部３を任意の方向に
屈曲させることができる。A bending operation knob 8a for bending the bending portion 3 is provided on the operating portion 1 connected to the base end of the flexible tube 2.
8b is disposed, and one of the operation wires in the vertical direction is pulled by the bending operation knob 8a for the vertical direction, and the other operation wire in the left and right direction is pulled by the bending operation knob 8b for the right and left direction. The bending portion 3 can be bent in any direction.

【００１２】操作部１には、その他にも、送気送水操作
ボタン１１、吸引操作ボタン１２及び処置具挿入口７ｂ
等が配置されている。１４は、図示されていない光源装
置に接続されるライトガイドケーブルである。The operation unit 1 also includes an air / water supply operation button 11, a suction operation button 12, and a treatment tool insertion port 7b.
Etc. are arranged. Reference numeral 14 denotes a light guide cable connected to a light source device (not shown).

【００１３】図１は、挿入部の可撓管２部分を示してい
る。可撓管２は外径が５〜１５ｍｍ程度、長さが５０〜
１５０ｃｍ程度であるが、判り易くするために、実際よ
り太く短く図示されている。FIG. 1 shows the flexible tube 2 of the insertion portion. The flexible tube 2 has an outer diameter of about 5 to 15 mm and a length of 50 to
Although it is about 150 cm, it is thicker and shorter than the actual figure for easy understanding.

【００１４】可撓管２は、例えば金属帯材製の螺旋管に
網状管を被覆し、その外面にポリウレタン樹脂等の外皮
を被覆して構成されているが、その各々の図示は省略さ
れている。また、内部に挿通配置されている光学繊維束
やチューブ類等の図示も省略されている。The flexible tube 2 is constituted by covering a helical tube made of, for example, a metal strip with a mesh tube and covering the outer surface thereof with a sheath of polyurethane resin or the like. I have. Also, illustration of optical fiber bundles, tubes, and the like inserted and arranged inside is omitted.

【００１５】なお、可撓管２を被覆する外皮部分はどの
ような構造であっても差し支えないが、途中で外皮の厚
さや硬度を異ならせて可撓管２自体の可撓性を変化させ
る必要はない。The outer sheath portion covering the flexible tube 2 may have any structure, but the thickness and hardness of the outer sheath are changed in the middle to change the flexibility of the flexible tube 2 itself. No need.

【００１６】可撓管２の基端部分には、操作部１に連結
するための基端連結口金２１が取り付けられ、可撓管２
の先端部分には、湾曲部３を連結するための先端連結筒
２２が取り付けられている。At the base end of the flexible tube 2, a base connection base 21 for connecting to the operation unit 1 is attached.
A distal end connecting tube 22 for connecting the curved portion 3 is attached to a distal end portion of the connecting portion.

【００１７】先端連結筒２２は、例えばステンレス鋼管
材によって形成されており、III−III断面が図３に示さ
れるように、四本の操作ワイヤ２３を緩く挿通して案内
するワイヤガイド２４の先端部分が、９０°間隔にスポ
ット溶接又は銀ロー付け等によって内周面に固着されて
いる。The distal end connecting tube 22 is formed of, for example, a stainless steel tube, and has a distal end of a wire guide 24 for loosely inserting and guiding the four operation wires 23 as shown in FIG. The parts are fixed to the inner peripheral surface at intervals of 90 ° by spot welding or silver brazing.

【００１８】図１には、４組ある操作ワイヤ２３とワイ
ヤガイド２４のうちの２組が示されている。ワイヤガイ
ド２４は、ステンレス鋼線を一定の径で密着巻きしたコ
イルパイプによって形成されており、各操作ワイヤ２３
の先端は、湾曲部３の先端部分に連結されている。FIG. 1 shows two of the four sets of operation wires 23 and wire guides 24. The wire guide 24 is formed of a coil pipe in which a stainless steel wire is closely wound with a constant diameter, and each operating wire 23
Is connected to a distal end portion of the bending portion 3.

【００１９】ワイヤガイド２４の基端部分は、操作部１
内の図示されていない湾曲操作機構フレームに固定され
ており、両端部以外の部分は自由な状態で可撓管２内に
挿通配置されている。The proximal end of the wire guide 24 is
Is fixed to a bending operation mechanism frame (not shown) inside, and portions other than both end portions are inserted through the flexible tube 2 in a free state.

【００２０】このように配置された各ワイヤガイド２４
に対して、可撓管２の基端位置から中間位置までの範囲
に、超弾性金属製のパイプ材からなる可撓性抑制用パイ
プ２５が被嵌されている。Each of the wire guides 24 arranged as described above
On the other hand, in the range from the base end position to the intermediate position of the flexible tube 2, a flexibility suppressing pipe 25 made of a superelastic metal pipe material is fitted.

【００２１】超弾性金属は、例えばＴｉ−Ｎｉ（チタン
−ニッケル）系のものであり、金属としては弾性限界が
非常に大きいので、可撓性抑制用パイプ２５は可撓管２
が曲げられる程度の曲率半径で屈曲されても塑性変形せ
ず、元の真っ直ぐな状態に戻ろうとする弾撥性を有して
いる。The superelastic metal is, for example, of Ti-Ni (titanium-nickel) type and has a very large elastic limit as a metal.
Does not undergo plastic deformation even if it is bent with a radius of curvature that allows it to be bent, and has a resilience to return to its original straight state.

【００２２】可撓性抑制用パイプ２５は、四本のワイヤ
ガイド２４の中の二本のワイヤガイド２４に被嵌されて
おり、例えば基端連結口金２１の出口部分付近において
各々ワイヤガイド２４に固定されている。The flexibility-suppressing pipes 25 are fitted on two of the four wire guides 24, for example, in the vicinity of the outlet of the base connection base 21, respectively. Fixed.

【００２３】ただし、超弾性金属は半田等が付き難いの
で、ワイヤガイド２４に半田付けにより固着された段付
きの筒状部材３１に、可撓性抑制用パイプ２５の基端部
を接着により固定してある。However, since the super-elastic metal is difficult to be soldered or the like, the base end of the flexibility suppressing pipe 25 is fixed to the stepped cylindrical member 31 fixed to the wire guide 24 by soldering. I have.

【００２４】それ以外の部分では、可撓性抑制用パイプ
２５はワイヤガイド２４に固定されていない。したがっ
て、可撓管２が曲げられた時には、可撓性抑制用パイプ
２５に対してその内側でワイヤガイド２４が軸線方向に
移動することができる。In other parts, the flexibility suppressing pipe 25 is not fixed to the wire guide 24. Therefore, when the flexible tube 2 is bent, the wire guide 24 can move in the axial direction on the inner side of the flexibility suppressing pipe 25.

【００２５】図４は、図１におけるIV−IV断面を示して
おり、可撓管２内に、処置具挿通チャンネル７、イメー
ジガイドファイババンドル１５、ライトガイドファイバ
バンドル１６、送気チューブ１７、送水チューブ１８及
び噴射用送水チューブ１９等が並んで挿通配置されてい
る。FIG. 4 shows a cross section taken along line IV-IV in FIG. 1. In the flexible tube 2, the treatment instrument insertion channel 7, image guide fiber bundle 15, light guide fiber bundle 16, air supply tube 17, water supply The tube 18, the water supply tube 19 for injection, and the like are inserted and arranged side by side.

【００２６】そして、処置具挿通チャンネル７に隣接し
ていて周囲の空間に余裕のないワイヤガイド２４ａには
肉厚の薄い可撓性抑制用パイプ２５ａが被嵌され、周囲
の空間に余裕のあるワイヤガイド２４ｂには肉厚の厚い
可撓性抑制用パイプ２５ｂが被嵌されている。A thin flexible suppressing pipe 25a is fitted on the wire guide 24a which is adjacent to the treatment instrument insertion channel 7 and has no margin in the surrounding space, and has a margin in the surrounding space. A thick flexible suppressing pipe 25b is fitted on the wire guide 24b.

【００２７】このようにして、二本のワイヤガイド２４
に可撓性抑制用パイプ２５が被嵌された可撓管２の基端
寄りの部分では、可撓管２が曲げられる際に可撓性抑制
用パイプ２５が抵抗として作用して可撓性が抑制され、
可撓管２の押し引き動作等が先端側に伝達され易い。In this way, the two wire guides 24
In a portion near the base end of the flexible tube 2 in which the flexibility suppressing pipe 25 is fitted, the flexibility suppressing pipe 25 acts as a resistance when the flexible tube 2 is bent, so that the flexibility is reduced. Is suppressed,
The push-pull operation of the flexible tube 2 is easily transmitted to the distal end side.

【００２８】そして、複数のワイヤガイド２４に、周囲
の空間の余裕に応じてあい異なる肉厚の可撓性抑制用パ
イプ２５を選択して被嵌したので、可撓管２を太くする
ことなく最適の可撓性を得ることができる。Then, since the flexibility suppressing pipes 25 having different thicknesses are selected and fitted to the plurality of wire guides 24 according to the margin of the surrounding space, the flexible pipe 2 is not thickened. Optimal flexibility can be obtained.

【００２９】一方、ワイヤガイド２４に可撓性抑制用パ
イプ２５が被嵌されていない可撓管２の先端寄りの部分
は、可撓管２の曲げ動作に対して可撓性抑制用パイプ２
５が何らの影響を及ぼさないので、可撓性が大きく（即
ち、柔軟性に富み）、体腔内の臓器形状に沿ってスムー
ズに変形する。On the other hand, the portion near the distal end of the flexible tube 2 where the flexibility suppressing pipe 25 is not fitted on the wire guide 24 is connected to the bending operation of the flexible tube 2.
Since 5 has no effect, it has high flexibility (that is, high flexibility) and smoothly deforms along the shape of the organ in the body cavity.

【００３０】ただし、単純にそのように構成すると、可
撓管２の中間部分で可撓性が急激に変化して使い難かっ
たり、その部分で急激に折れ曲がって破損し易くなる場
合がある。However, if such a structure is simply employed, the flexibility may suddenly change at the middle portion of the flexible tube 2 to make it difficult to use, or the portion may be sharply bent and easily broken.

【００３１】そこで、図１に示されるように、複数の可
撓性抑制用パイプ２５が互いの先端位置をずらして各ワ
イヤガイド２４に被嵌されており、それによって可撓管
２の中間部における可撓性が滑らかに変化している。Therefore, as shown in FIG. 1, a plurality of flexible suppressing pipes 25 are fitted to the respective wire guides 24 with their tip positions shifted from each other, whereby the intermediate portion of the flexible tube 2 is formed. Has a smooth change in flexibility.

【００３２】図５は、本発明の第２の実施の形態の可撓
管２部分を示しており、各可撓性抑制用パイプ２５の先
端面に当接するストッパ環２６をワイヤガイド２４の外
周面に固着し、可撓性抑制用パイプ２５の先端部分がワ
イヤガイド２４に対して相対的に軸線方向に動くのを規
制したものである。FIG. 5 shows a flexible tube 2 according to a second embodiment of the present invention, in which a stopper ring 26 abutting on a distal end surface of each flexibility suppressing pipe 25 is attached to the outer periphery of the wire guide 24. It is fixed to the surface and restricts the distal end portion of the flexibility suppressing pipe 25 from moving in the axial direction relatively to the wire guide 24.

【００３３】なお、上記の各実施の形態においては二本
のワイヤガイド２４に可撓性抑制用パイプ２５を被嵌し
たが、本発明はそれに限定されるものではなく、周囲の
空間の余裕に応じた肉厚の可撓性抑制用パイプ２５を、
三本以上のワイヤガイド２４に被嵌してもよい。In each of the above embodiments, the two wire guides 24 are fitted with the flexibility suppressing pipes 25. However, the present invention is not limited to this. A pipe 25 for suppressing flexibility having a corresponding thickness
It may be fitted on three or more wire guides 24.

【００３４】[0034]

【発明の効果】本発明によれば、ワイヤガイドの可撓管
内に位置する部分のうち、可撓管の基端位置から中間位
置までの範囲に、超弾性金属製のパイプ材からなる可撓
性抑制用パイプを被嵌したことにより、可撓管の外皮の
厚さや硬度を変化させることなく、可撓管で外装された
部分の可撓性を途中で容易にバラツキなく変化させるこ
とができ、しかも、複数のワイヤガイドに被嵌される可
撓性抑制用パイプの肉厚をあい異ならせたことにより、
可撓管を太くすることなく最適の可撓性を得ることがで
きる。According to the present invention, of the portion of the wire guide located in the flexible tube, the flexible portion made of superelastic metal pipe material is provided in the range from the base end position to the intermediate position of the flexible tube. The flexibility of the part covered with the flexible tube can be easily changed in the middle without changing the thickness and hardness of the outer skin of the flexible tube by fitting the pipe for preventing the property. Moreover, by making the thickness of the flexibility suppressing pipe fitted to the plurality of wire guides different,
Optimal flexibility can be obtained without making the flexible tube thick.

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

【図１】本発明の第１の実施の形態の内視鏡の挿入部可
撓管部分の軸線を含む面における断面図である。FIG. 1 is a cross-sectional view of a plane including an axis of an insertion portion flexible tube portion of an endoscope according to a first embodiment of the present invention.

【図２】内視鏡の外観略示図である。FIG. 2 is a schematic diagram showing the appearance of an endoscope.

【図３】本発明の第１の実施の形態の図１におけるIII
−III断面図である。FIG. 3 is a diagram showing a first embodiment of the present invention;
It is a III sectional view.

【図４】本発明の第１の実施の形態の図１におけるIV−
IV断面図である。FIG. 4 is a cross-sectional view taken along a line IV- in FIG. 1 according to the first embodiment of the present invention;
It is IV sectional drawing.

【図５】本発明の第２の実施の形態の内視鏡の挿入部可
撓管部分の軸線を含む面における断面図である。FIG. 5 is a cross-sectional view of a plane including an axis of a flexible tube portion of an insertion section of an endoscope according to a second embodiment of the present invention.

【符号の説明】[Explanation of symbols]

２ 可撓管 ２３ 操作ワイヤ ２４（２４ａ，２４ｂ） ワイヤガイド ２５（２５ａ，２５ｂ） 可撓性抑制用パイプ 2 Flexible tube 23 Operation wire 24 (24a, 24b) Wire guide 25 (25a, 25b) Pipe for suppressing flexibility

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】挿入部を外装する可撓管内に、操作ワイヤ
を挿通して案内するための密着巻きコイルパイプからな
る複数のワイヤガイドが挿通配置された内視鏡の挿入部
において、 上記複数のワイヤガイドの中の少なくとも二つのワイヤ
ガイドの上記可撓管内に位置する部分のうち、上記可撓
管の基端位置から中間位置までの範囲に、ワイヤガイド
によってあい異なる肉厚の超弾性合金製のパイプ材から
なる可撓性抑制用パイプを被嵌したことを特徴とする内
視鏡の挿入部。An insertion part of an endoscope in which a plurality of wire guides each composed of a tightly wound coil pipe for inserting and guiding an operation wire through a flexible tube which covers an insertion part is provided. A portion of at least two of the wire guides located in the flexible tube in a range from a base end position to an intermediate position of the flexible tube, a superelastic alloy having a different wall thickness depending on the wire guide. An insertion part for an endoscope, wherein a flexible suppressing pipe made of a pipe material made of stainless steel is fitted. 【請求項２】上記可撓管内において周囲の空間に余裕の
あるワイヤガイドには肉厚の厚い可撓性抑制用パイプが
被嵌され、周囲の空間に余裕の少ないワイヤガイドには
肉厚の薄い可撓性抑制用パイプが被嵌されている請求項
１記載の内視鏡の挿入部。2. A thick-walled flexibility-suppressing pipe is fitted in a wire guide having a sufficient space in the surrounding space in the flexible tube, and a thick-walled flexible pipe is fitted in the wire guide having a small space in the surrounding space. 2. The endoscope insertion part according to claim 1, wherein a thin flexible suppressing pipe is fitted. 【請求項３】上記複数の可撓性抑制用パイプが、互いの
先端位置をずらして各ワイヤガイドに被嵌されている請
求項１又は２記載の内視鏡の挿入部。3. The insertion section for an endoscope according to claim 1, wherein the plurality of flexible suppressing pipes are fitted to the respective wire guides with their tip positions shifted from each other. 【請求項４】上記可撓性抑制用パイプが、基端側だけで
上記ワイヤガイドに対して固定されている請求項１ない
し３のいずれかの項に記載の内視鏡の挿入部。4. The endoscope insertion section according to claim 1, wherein the flexibility suppressing pipe is fixed to the wire guide only at a base end side. 【請求項５】上記可撓性抑制用パイプが、両端において
上記ワイヤガイドに対して固定されている請求項１ない
し３のいずれかの項に記載の内視鏡の挿入部。5. The endoscope insertion section according to claim 1, wherein the flexible suppressing pipe is fixed to the wire guide at both ends.
JP07296698A 1998-03-23 1998-03-23 Endoscope insertion part Expired - Fee Related JP3992822B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07296698A JP3992822B2 (en) 1998-03-23 1998-03-23 Endoscope insertion part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07296698A JP3992822B2 (en) 1998-03-23 1998-03-23 Endoscope insertion part

Publications (2)

Publication Number Publication Date
JPH11267092A true JPH11267092A (en) 1999-10-05
JP3992822B2 JP3992822B2 (en) 2007-10-17

Family

ID=13504645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP07296698A Expired - Fee Related JP3992822B2 (en) 1998-03-23 1998-03-23 Endoscope insertion part

Country Status (1)

Country Link
JP (1) JP3992822B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230838A (en) * 2005-02-28 2006-09-07 Pentax Corp Curving device of endoscope
WO2011092937A1 (en) * 2010-01-29 2011-08-04 オリンパスメディカルシステムズ株式会社 Inserting apparatus and endoscope

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006230838A (en) * 2005-02-28 2006-09-07 Pentax Corp Curving device of endoscope
WO2011092937A1 (en) * 2010-01-29 2011-08-04 オリンパスメディカルシステムズ株式会社 Inserting apparatus and endoscope
JP4856289B2 (en) * 2010-01-29 2012-01-18 オリンパスメディカルシステムズ株式会社 Insertion device, endoscope
US8702595B2 (en) 2010-01-29 2014-04-22 Olympus Medical Systems Corp. Insertion instrument endoscope

Also Published As

Publication number Publication date
JP3992822B2 (en) 2007-10-17

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