JP2002017655A - Distal end of endoscope - Google Patents

Distal end of endoscope

Info

Publication number
JP2002017655A
JP2002017655A JP2000206208A JP2000206208A JP2002017655A JP 2002017655 A JP2002017655 A JP 2002017655A JP 2000206208 A JP2000206208 A JP 2000206208A JP 2000206208 A JP2000206208 A JP 2000206208A JP 2002017655 A JP2002017655 A JP 2002017655A
Authority
JP
Japan
Prior art keywords
distal end
treatment instrument
raising piece
endoscope
instrument raising
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.)
Withdrawn
Application number
JP2000206208A
Other languages
Japanese (ja)
Inventor
Teruo Ouchi
輝雄 大内
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 JP2000206208A priority Critical patent/JP2002017655A/en
Publication of JP2002017655A publication Critical patent/JP2002017655A/en
Withdrawn legal-status Critical Current

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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
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00098—Deflecting means for inserted tools

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  • 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 the distal end of an endoscope which allows easier cleaning of internal sordes or the like adhering to endoscopic accessories erecting piece and a housing part thereof. SOLUTION: A treating instrument erecting piece 6 is mounted on a tip cap 2 detachably installed on the tip part body 1 covering the external surface of the tip part body 1 where an objective optical system 13 or the like is arranged.

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、処置具類の突出
方向を変えるための処置具起上片が挿入部先端に配置さ
れた内視鏡の先端部に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end portion of an endoscope in which a treatment instrument raising piece for changing a projecting direction of a treatment instrument is disposed at a distal end of an insertion portion.

【０００２】[0002]

【従来の技術】側方視型内視鏡などにおいては、一般
に、処置具挿通チャンネルに挿通された処置具の先端部
分の突出方向を変えるための処置具起上片が、挿入部先
端の先端部本体内に支軸によって回動自在に支持され、
操作部から進退操作される操作ワイヤにより駆動されて
処置具の突出方向を変えることができるようになってい
る。2. Description of the Related Art In a side view type endoscope or the like, a treatment instrument raising piece for changing a projecting direction of a distal end portion of a treatment instrument inserted into a treatment instrument insertion channel is generally provided at a distal end of an insertion portion. Is rotatably supported by a support shaft inside the main body,
The treatment tool is driven by an operation wire that is operated to advance and retreat from the operation unit, so that the direction in which the treatment tool projects can be changed.

【０００３】しかし、そのような処置具起上片は先端部
本体に形成された溝内に配置されているのが普通であ
り、使用の度に付着する体内汚物等を完全に洗浄して除
去するのが難しい。[0003] However, such a treatment instrument raising piece is usually arranged in a groove formed in the distal end main body, and thoroughly removes body dirt and the like adhering to the body each time it is used. Difficult to do.

【０００４】そこで従来は、処置具起上片が配置された
空間を薄いゴム材等の弾性カバーで水密に覆って、処置
具はその弾性カバーの外側を通るようにし、体内汚物等
が処置具起上片に触れないように配置することが試みら
れていた（実開平２−９１５０４号公報）。Therefore, conventionally, the space in which the treatment instrument raising pieces are arranged is water-tightly covered with an elastic cover such as a thin rubber material, so that the treatment instrument passes outside the elastic cover, and the body contaminants and the like are treated by the treatment instrument. Attempts have been made to dispose the raised pieces without touching them (Japanese Utility Model Laid-Open No. 2-91504).

【０００５】[0005]

【発明が解決しようとする課題】しかし、処置具を起上
させて挿脱操作する際には、処置具と処置具起上片との
接触部分において大きな摩擦抵抗が発生する。したがっ
て、その部分にゴム材等が用いられていると、処置具の
挿脱に非常に大きな操作力量が必要となるので実用性に
乏しい。However, when the treatment tool is raised and inserted / removed, a large frictional resistance is generated at a contact portion between the treatment tool and the treatment tool raising piece. Therefore, if a rubber material or the like is used in that portion, a very large amount of operating force is required to insert and remove the treatment tool, which is not practical.

【０００６】そこで本発明は、処置具起上片及びその収
容部分に付着した体内汚物等を容易に洗浄することがで
きる内視鏡の先端部を提供することを目的とする。Accordingly, an object of the present invention is to provide a distal end portion of an endoscope which can easily clean body waste and the like attached to a treatment instrument raising piece and its accommodating portion.

【０００７】[0007]

【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡の先端部は、処置具挿通チャンネル
に挿通された処置具の先端部分の突出方向を変えるため
に、遠隔操作によって作動する処置具起上片が設けられ
た内視鏡の先端部において、対物光学系等が配置された
先端部本体の外表面を覆うように先端部本体に対して着
脱自在に設けられた先端キャップに、処置具起上片を取
り付けたものである。To achieve the above object, the distal end of the endoscope according to the present invention is provided with a remote control for changing the projecting direction of the distal end portion of the treatment tool inserted into the treatment tool insertion channel. At the distal end of the endoscope provided with the treatment instrument raising piece operated by the operation, the distal end is detachably provided to the distal end main body so as to cover the outer surface of the distal end main body in which the objective optical system and the like are arranged. The treatment instrument raising piece is attached to the distal end cap.

【０００８】なお、処置具起上片が、先端キャップと一
体に形成されていてもよく、或いは先端キャップに回動
自在に支持されていてもよい。また、処置具起上片を遠
隔操作するための操作ワイヤの先端部分と処置具起上片
とが係脱自在であるとよい。[0008] The treatment instrument raising piece may be formed integrally with the distal end cap, or may be rotatably supported by the distal end cap. Further, it is preferable that the distal end portion of the operation wire for remotely operating the treatment instrument raising piece and the treatment instrument raising piece be detachable.

【０００９】[0009]

【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２は側方視型内視鏡の挿入部の先端部分を
示しており、ステンレス鋼製の先端部本体１の側面に観
察窓３と照明窓４が並んで配置されている。Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a distal end portion of the insertion portion of the side-viewing type endoscope. An observation window 3 and an illumination window 4 are arranged side by side on a side surface of a distal end body 1 made of stainless steel.

【００１０】先端部本体１の表面は、先端部本体１に着
脱自在に取り付けられた電気絶縁性の弾力性のあるゴム
材等からなる先端キャップ２によって、観察窓３と照明
窓４部分を除く全ての部分が覆われている。The observation window 3 and the illumination window 4 are removed from the surface of the distal end body 1 by a distal end cap 2 which is detachably attached to the distal end body 1 and is made of an electrically insulating elastic rubber material or the like. All parts are covered.

【００１１】先端キャップ２の後端部分２ａは内側に小
さく折れ曲がった形状に形成されており、その後端部分
２ａが先端部本体１の外周面に形成された円周溝１ａに
係合することにより先端キャップ２が先端部本体１に係
止され、先端キャップ２の後端部分２ａを弾性変形させ
ることにより、先端キャップ２を先端部本体１から前方
にスライドさせて取り外すことができる。The rear end portion 2a of the front end cap 2 is formed to be slightly bent inward, and the rear end portion 2a engages with a circumferential groove 1a formed on the outer peripheral surface of the front end main body 1. The distal end cap 2 is locked to the distal end main body 1 and the rear end portion 2a of the distal end cap 2 is elastically deformed, so that the distal end cap 2 can be slid forward from the distal end main body 1 and removed.

【００１２】観察窓３及び照明窓４と並んで、処置具起
上片６が収容された処置具誘導室５が形成されている。
この処置具誘導室５を形成するために、先端部本体１
は、図３に単体で図示されるように、観察窓３と照明窓
４の側方に沿う半部が切除された形状に形成されてい
る。A treatment tool guiding room 5 accommodating a treatment tool raising piece 6 is formed alongside the observation window 3 and the illumination window 4.
In order to form the treatment instrument guiding chamber 5, the distal end main body 1
Is formed in a shape in which a half portion along the side of the observation window 3 and the illumination window 4 is cut off as shown in FIG. 3 alone.

【００１３】また、先端キャップ２側も、図２における
IV−IV断面を図示する図４に示されるように、先端部本
体１との間に一定幅の溝（処置具誘導室５）ができる形
状に形成されている。Further, the tip cap 2 side is also shown in FIG.
As shown in FIG. 4 showing an IV-IV cross section, a groove (treatment instrument guiding chamber 5) having a fixed width is formed between the distal end body 1 and the body.

【００１４】図４に示されるように、観察窓３の内側に
は直角プリズム等を含む対物光学系１３が配置されてい
る。１４は、射出端面が照明窓４の内側に配置されてい
るライトガイドファイババンドルである。As shown in FIG. 4, an objective optical system 13 including a right-angle prism and the like is arranged inside the observation window 3. Reference numeral 14 denotes a light guide fiber bundle whose emission end face is arranged inside the illumination window 4.

【００１５】図１は、図２におけるＩ−Ｉ断面を示して
いる。ただし、理解し易いようにするために、実際には
Ｉ−Ｉ断面に現れない操作ワイヤ７を図１に含めて図示
してある。FIG. 1 shows a II section in FIG. However, for the sake of easy understanding, the operation wire 7 which does not actually appear in the II section is shown in FIG.

【００１６】９は、処置具が挿通される処置具挿通チャ
ンネルであり、内視鏡挿入部内に全長にわたって挿通配
置され、処置具挿通チャンネル９の先端が処置具誘導室
５の後端下部に連通するように先端部本体１に接続固着
されている。Reference numeral 9 denotes a treatment tool insertion channel through which a treatment tool is inserted. The treatment tool insertion channel is inserted through the entire length of the endoscope insertion portion, and the distal end of the treatment tool insertion channel 9 communicates with the lower rear end of the treatment tool guiding chamber 5. And is fixedly connected to the distal end body 1.

【００１７】処置具起上片６は、先端キャップ２と一繋
がりに先端キャップ２と一体に形成されている。処置具
起上片６は、処置具誘導室５内を通過する処置具１００
の先端が外方に向かってスムーズに突出するように案内
する湾曲した斜面を有している。The treatment instrument raising piece 6 is formed integrally with the distal end cap 2 so as to be connected to the distal end cap 2. The treatment instrument elevating piece 6 is used for the treatment instrument 100 that passes through the treatment instrument guide chamber 5.
Has a curved slope for guiding the tip so as to smoothly project outward.

【００１８】その斜面には、処置具１００との間の摩擦
抵抗を小さくするために、ステンレス鋼板材等からなる
滑りのよい案内板６ｂが取り付けられている。ただし、
必ずしも案内板６ｂはなくてもよい。A sliding guide plate 6b made of a stainless steel plate or the like is attached to the slope to reduce frictional resistance between the treatment tool 100 and the treatment tool 100. However,
The guide plate 6b is not necessarily required.

【００１９】処置具起上片６は、薄く形成された基部６
ａにおいてのみ先端キャップ２と繋がっており、その部
分を弾性変形させながら処置具誘導室５内において傾動
することができる。The treatment instrument raising piece 6 has a thin base 6.
Only at a, the distal end cap 2 is connected to the distal end cap 2 and can be tilted in the treatment instrument guiding chamber 5 while elastically deforming the portion.

【００２０】処置具起上片６の基部６ａから離れた位置
に、操作ワイヤ７の端部７ａが係止されている。その部
分は、図４に示されるように、直角に曲げられた操作ワ
イヤ７が処置具起上片６に形成された孔に通され、操作
ワイヤ７の端部７ａがテーパ状に広がった形状に形成さ
れて、処置具起上片６からの抜け止めになっている。An end 7a of the operation wire 7 is locked at a position away from the base 6a of the treatment instrument raising piece 6. As shown in FIG. 4, the operation wire 7 bent at a right angle is passed through a hole formed in the treatment instrument raising piece 6, and the end portion 7a of the operation wire 7 is tapered. And is prevented from coming off from the treatment instrument raising piece 6.

【００２１】操作ワイヤ７は、図１及び図２に示される
ように、内視鏡挿入部内に全長にわたって挿通配置され
たガイドパイプ８内から先端部本体１に形成された通過
孔１０内に、軸線方向に進退自在に挿通されている。As shown in FIGS. 1 and 2, the operation wire 7 is inserted into a through hole 10 formed in the distal end body 1 from a guide pipe 8 inserted through the entire length of the endoscope insertion portion. It is inserted to be able to advance and retreat in the axial direction.

【００２２】そして、図示されていない操作部側から操
作ワイヤ７を牽引操作することにより、図１に二点鎖線
で示されるように、処置具起上片６が起上して処置具１
００の突出方向を任意に変えることができる。Then, by pulling the operation wire 7 from the operation section side (not shown), the treatment instrument raising piece 6 rises as shown by a two-dot chain line in FIG.
00 can be changed in any direction.

【００２３】なお、処置具起上片６に形成された操作ワ
イヤ係合孔に連続してその背部側に溝６ｃが形成されて
おり、操作ワイヤ７をその溝６ｃから抜き出して処置具
起上片６と分離することができる。A groove 6c is formed on the back side of the operation wire engaging hole formed in the treatment instrument raising piece 6, and the operation wire 7 is pulled out from the groove 6c to raise the treatment instrument. It can be separated from the piece 6.

【００２４】このように構成された内視鏡の先端部にお
いては、内視鏡検査が終了する毎に、先端部本体１から
先端キャップ２を取り外して双方の内部を洗浄すること
ができ、その際に、処置具起上片６が先端キャップ２と
共に先端部本体１から取り外される。At the distal end of the endoscope thus constructed, each time the endoscope inspection is completed, the distal end cap 2 can be removed from the distal end body 1 to clean the inside of both. At this time, the treatment instrument raising piece 6 is removed from the distal end main body 1 together with the distal end cap 2.

【００２５】したがって、処置具起上片６及び処置具誘
導室５内に付着した体内汚物等を十分に洗浄して除去す
ることができ、被検者間感染のおそれ等を大幅に低減さ
せることができる。[0025] Therefore, it is possible to sufficiently wash and remove the internal contaminants and the like adhered to the treatment instrument raising piece 6 and the treatment instrument guide chamber 5, thereby greatly reducing the risk of infection between subjects. Can be.

【００２６】図５は本発明の第２の実施例の内視鏡の先
端部を示しており、処置具起上片６がステンレス鋼等の
金属により形成されていて、支軸２１により回動自在に
先端キャップ２に支持されている。FIG. 5 shows a distal end portion of an endoscope according to a second embodiment of the present invention. The treatment instrument raising piece 6 is formed of metal such as stainless steel, and is rotated by a support shaft 21. It is freely supported by the tip cap 2.

【００２７】また、処置具起上片６に連結された従動側
フック２２と操作ワイヤ７に連結された駆動側フック２
３とを互いに引っかける状態に係合させて、処置具起上
片６と操作ワイヤ７との分離を容易に行えるように構成
してある。従動側フック２２は、支軸２５によって回動
自在に処置具起上片６に連結されている。A driven hook 22 connected to the treatment instrument raising piece 6 and a driving hook 2 connected to the operation wire 7 are also provided.
3 are engaged with each other so as to be hooked to each other, so that the treatment instrument raising piece 6 and the operation wire 7 can be easily separated from each other. The driven side hook 22 is rotatably connected to the treatment instrument raising piece 6 by a support shaft 25.

【００２８】したがって、前述の第１の実施例と同様
に、先端部本体１から先端キャップ２を取り外すことに
より、処置具起上片６が先端キャップ２と共に取り外さ
れ、処置具起上片６及び処置具誘導室５内に付着した体
内汚物等を十分に洗浄して除去することができる。その
他の構成は前述の第１の実施例と同じであり、それらの
部分には第１の実施例と同じ符号を付して説明は省略す
る。Therefore, similarly to the first embodiment, by removing the distal end cap 2 from the distal end body 1, the treatment instrument raising piece 6 is removed together with the distal end cap 2, and the treatment instrument raising piece 6 and Internal dirt and the like attached to the treatment instrument guiding chamber 5 can be sufficiently washed and removed. Other configurations are the same as those of the above-described first embodiment, and those portions are denoted by the same reference numerals as those of the first embodiment, and description thereof will be omitted.

【００２９】[0029]

【発明の効果】本発明によれば、対物光学系等が配置さ
れた先端部本体の外表面を覆うように先端部本体に対し
て着脱自在に設けられた先端キャップに、処置具起上片
を取り付けたことにより、内視鏡検査が終了する毎に、
先端部本体から先端キャップを外して双方の内部を洗浄
することができ、その際に処置具起上片が先端キャップ
と共に先端部本体から外れるので、処置具起上片及びそ
の収容部分等に付着した体内汚物等を容易に洗浄して除
去することができ、被検者間感染のおそれ等を大幅に低
減させることができる。According to the present invention, the treatment instrument raising piece is provided on the distal end cap detachably provided on the distal end main body so as to cover the outer surface of the distal end main body on which the objective optical system and the like are disposed. By attaching, every time the endoscope inspection is completed,
The inside of both ends can be cleaned by removing the tip cap from the tip body, and at this time, the treatment instrument raising piece is detached from the tip body together with the tip cap, so that it adheres to the treatment tool raising piece and its accommodating part. It is possible to easily wash and remove the contaminated body and the like, and it is possible to greatly reduce the risk of infection between subjects and the like.

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

【図１】本発明の第１の実施例の内視鏡の先端部の側面
断面図（図２におけるＩ−Ｉ断面図）である。FIG. 1 is a side cross-sectional view (a cross-sectional view taken along II in FIG. 2) of a distal end portion of an endoscope according to a first embodiment of the present invention.

【図２】本発明の第１の実施例の内視鏡の先端部の平面
図である。FIG. 2 is a plan view of a distal end portion of the endoscope according to the first embodiment of the present invention.

【図３】本発明の第１の実施例の内視鏡の先端部の先端
部本体単体の斜視図である。FIG. 3 is a perspective view of a distal end main body alone of the distal end portion of the endoscope according to the first embodiment of the present invention.

【図４】本発明の第１の実施例の内視鏡の先端部の正面
断面図（図２におけるIV−IV断面図）である。FIG. 4 is a front sectional view (a sectional view taken along line IV-IV in FIG. 2) of a distal end portion of the endoscope according to the first embodiment of the present invention.

【図５】本発明の第２の実施例の内視鏡の先端部の側面
断面図である。FIG. 5 is a side sectional view of a distal end portion of an endoscope according to a second embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１ 先端部本体 ２ 先端キャップ ５ 処置具誘導室 ６ 処置具起上片 ７ 操作ワイヤ ９ 処置具挿通チャンネル １３ 対物光学系 １００ 処置具 REFERENCE SIGNS LIST 1 distal end main body 2 distal end cap 5 treatment tool guiding chamber 6 treatment tool raising piece 7 operation wire 9 treatment tool insertion channel 13 objective optical system 100 treatment tool

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】処置具挿通チャンネルに挿通された処置具
の先端部分の突出方向を変えるために、遠隔操作によっ
て作動する処置具起上片が設けられた内視鏡の先端部に
おいて、 対物光学系等が配置された先端部本体の外表面を覆うよ
うに上記先端部本体に対して着脱自在に設けられた先端
キャップに、上記処置具起上片を取り付けたことを特徴
とする内視鏡の先端部。1. A distal end portion of an endoscope provided with a treatment instrument raising piece which is remotely operated to change a projecting direction of a distal end portion of a treatment instrument inserted into a treatment instrument insertion channel. An endoscope wherein the treatment instrument raising piece is attached to a distal end cap detachably provided to the distal end body so as to cover an outer surface of the distal end body in which a system or the like is disposed. Tip. 【請求項２】上記処置具起上片が上記先端キャップと一
体に形成されている請求項１記載の内視鏡の先端部。2. The distal end portion of an endoscope according to claim 1, wherein the treatment instrument raising piece is formed integrally with the distal end cap. 【請求項３】上記処置具起上片が上記先端キャップに回
動自在に支持されている請求項１記載の内視鏡の先端
部。3. The distal end of an endoscope according to claim 1, wherein said treatment instrument raising piece is rotatably supported by said distal end cap. 【請求項４】上記処置具起上片を遠隔操作するための操
作ワイヤの先端部分と上記処置具起上片とが係脱自在で
ある請求項１、２又は３記載の内視鏡の先端部。4. A distal end of an endoscope according to claim 1, wherein a distal end portion of an operation wire for remotely controlling said treatment instrument raising piece and said treatment instrument raising piece are detachable. Department.
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