JP4081251B2 - Duodenoscope - Google Patents

Duodenoscope Download PDF

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Publication number
JP4081251B2
JP4081251B2 JP2001235423A JP2001235423A JP4081251B2 JP 4081251 B2 JP4081251 B2 JP 4081251B2 JP 2001235423 A JP2001235423 A JP 2001235423A JP 2001235423 A JP2001235423 A JP 2001235423A JP 4081251 B2 JP4081251 B2 JP 4081251B2
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Japan
Prior art keywords
bending
bending portion
endoscope
distal end
end portion
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JP2001235423A
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Japanese (ja)
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JP2003038418A (en
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康人 倉
剛 小倉
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Olympus Corp
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Olympus Corp
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【0001】
【発明の属する技術分野】
本発明は、内視鏡挿入部に、第1湾曲部と、第2湾曲部とを有する十二指腸用内視鏡に関する。
【0002】
【従来の技術】
内視鏡には挿入部が硬性な内視鏡と挿入部が軟性な内視鏡とがあり、軟性な内視鏡の中には挿入部に湾曲部を設けたものがある。前記湾曲部は、一般的に、挿入部の先端側を構成する先端部に連設しており、この湾曲部より延出する操作ワイヤは挿入部内を挿通して操作部に設けた手元操作部に取り付けられている。したがって、この手元操作部を適宜操作して前記操作ワイヤを進退移動させることによって、湾曲部を湾曲動作させて先端部を所望の部位に向けられるようになっている。
【0003】
例えば、実公昭60ー41207号公報には、複数の湾曲駒を一列にならべ、隣接する湾曲駒同士を回動自在に連結するとともに、その湾曲駒群の外周に網管や柔軟性のあるチューブ体を被覆して構成した湾曲部を有する内視鏡が示されている。
【0004】
前記湾曲部を有する内視鏡を用いて、経内視鏡的に胆管、膵管に造影剤を注入しX線造影を行う場合、通常、側視型の内視鏡を用いる。この内視鏡に設けられている処置具チャンネルを介して十二指腸内に造影チューブを挿入し、その造影チューブの先端を十二指腸乳頭内に挿入する。このとき、図8(内視鏡先端部を十二指腸内に挿入して湾曲操作している状態を示す図)に示すように、観察光学系を構成する観察窓91を側面に設けた内視鏡先端部90を十二指腸乳頭に対して、観察及び処置を行い易い適切な距離を保持して、正面視させることが重要である。
【0005】
【発明が解決しようとする課題】
しかしながら、観察中に湾曲部92を湾曲操作して例えば観察目的部位である十二指腸乳頭を観察する角度を変化させると、湾曲部92の手元側から湾曲がかかって、湾曲部92の全体が湾曲することにより、図中の実線で示す状態から破線に示す状態に変化して、十二指腸乳頭との距離が離れる(あるいは近づく)ことになり、適切な距離を保ちながら正面視を行うことが難しい。
【0006】
本発明は上記事情に鑑みてなされたものであり、湾曲部を湾曲させる湾曲操作を行う際、内視鏡先端部と目的観察部位との間隔を適切な距離にする操作及び、この適切な距離を保持した状態で内視鏡先端部を目的観察部位に対して正面視させる操作が可能な十二指腸用内視鏡を提供することを目的にしている。
【0007】
本発明の十二指腸用内視鏡は、内視鏡挿入部に、観察光学系を構成する観察窓を側部に設けた先端部と、内視鏡操作部に設けた第1湾曲部操作ノブの操作で第1湾曲操作ワイヤを進退移動させることによって湾曲動作する第1湾曲部及び前記先端部と前記第1湾曲部との間に配置されて内視鏡操作部に設けた第2湾曲部操作ノブの操作で第2湾曲操作ワイヤを進退移動させることによって湾曲動作する第2湾曲部で構成した湾曲部と、を有する十二指腸用内視鏡であって
前記第1湾曲部の湾曲方向を4方向に設定する一方、前記第2湾曲部の湾曲方向を2方向に設定し、かつ前記第2湾曲部の長さ寸法を、前記先端部の向きを微調整するために、前記第1湾曲部の長さ寸法より短く設定している。
【0008】
この構成によれば、通常の内視鏡の湾曲部操作性を損なうことなく、第1湾曲部と第2湾曲部とを、第1湾曲部操作ノブ及び第2湾曲部操作ノブを用いて適宜湾曲動作させることにより、先端部を目的観察部位から所定の距離に保持して、正面視させられる。
【0009】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態を説明する。
図1ないし図5は本発明の第1実施形態に係り、図1は内視鏡を説明する図、図2は先端部の構成を説明する断面図、図3は湾曲部の構成を説明する図、図4は湾曲部の作用を説明する図、図5は湾曲操作と先端部の位置との関係を説明する図である。
【0010】
なお、図4(a)は主湾曲部を湾曲させて先端部を移動させた状態を説明する図、図4(b)は副湾曲部を湾曲させて先端部を移動させた状態を説明する図、図5(a)は先端部と十二指腸乳頭との距離を設定する際の操作例を説明する図、図5(b)は。先端部を十二指腸乳頭に対向させる際の操作例を説明する図である。
【0011】
図1に示すように本実施形態の内視鏡1は、体腔内に挿入される細長で可撓性を有する挿入部2と、この挿入部2の基端部に連設した操作部3と、この操作部3の側部から延出して基端部に図示しない光源装置に着脱自在なコネクタ部4aを設けたユニバーサルコード4とで主に構成されている。
【0012】
前記挿入部2は、先端側より順に先端部5、第2湾曲部である副湾曲部6bと第1湾曲部である主湾曲部6aとで構成された湾曲部6,可撓管部7を連設して構成されている。
【0013】
前記先端部5は、例えば金属部材で形成された先端部本体(図2の符号13参照)と、この先端部本体13を覆い電気的に絶縁する先端絶縁カバー(図2の符号14参照)とで構成され、この先端部5の側部には観察光学系を構成する観察窓11及び照明光学系を構成する照明窓12が設けられるとともに、起上台15を収納する収納室16が設けられている。
【0014】
前記収納室16は、挿入部2内を挿通する図示しない処置具挿通チャンネルと連通しており、この収納室16はその処置具挿通チャンネルの先端開口部17を兼ねる構成になっている。また、前記操作部3には前記処置具挿通チャンネルに連通する処置具挿入口18が設けられている。このため、処置具挿入口18から処置具挿通チャンネルに例えば造影チューブなどの処置具9を挿入することにより、その処置具9の先端部9aを前記収納室16から突き出せるようになっており、このときの先端部9aの突出方向は起上台15で調整されるようになっている。
【0015】
前記操作部3には主湾曲部6aを上下方向及び左右方向へ湾曲させるための第1湾曲部操作ノブである主湾曲部操作ノブ20、副湾曲部6bを上下方向へ湾曲させるための第2湾曲部操作ノブである副湾曲部操作ノブ21、前記収納室16内に配置された起上台15の起伏動作を行うための処置具起上レバー22が設けられている。さらに、この操作部3には、送気・送水用操作ボタン23、吸引用操作ボタン24、外部装置を制御する各種制御スイッチ25等が設けられている。
【0016】
図2に示すように前記先端部5には前記観察窓11と、複数の各種光学レンズ26をレンズ枠27に固定して構成した対物レンズユニット28と、この対物レンズユニット28の結像位置に配置されて、観察画像を電気信号に変換する固体撮影素子29等で構成された観察光学系30が内蔵されている。
【0017】
なお、本図においては側視型の内視鏡1であるので観察光学系30に観察方向を変換するプリズム31を配置している。また、前記観察光学系30以外にも、前記照明窓12に先端面が対向して観察時の照明光を供給する照明光学系を構成するライトガイド32や,前記観察窓11の窓面に向けて空気や水等を噴出する送気送水ノズル33等が設けられている。
【0018】
ここで、図3を参照して湾曲部6の構造について説明する。
図に示すように湾曲部6は、内視鏡挿入時や観察時に、先端部5の位置を大きく変化させる際に主に使用される主湾曲部6aと、先端部5の方向の調整を微妙に行う際に使用される副湾曲部6bとで構成されており、2つの湾曲部6a、6bを連結駒40によって連結している。
【0019】
まず、主湾曲部6aの構成を説明する。
主湾曲部6aは、円環状に形成した複数(ここでは10個とする)の湾曲駒41,…,41を軸方向に配列させ、隣接する湾曲駒41,41同士を回動自在に連接している。このとき、主湾曲部6aでは、各隣接した湾曲駒41,41同士は一つおきに、上下位置と左右位置とに配置した軸用リベット42によって回動自在に連結されている。
【0020】
つまり、各湾曲駒41の前後端における連結位置を、周方向に対して90度変えている。したがって、1つの軸用リベット42で連結された湾曲駒41,41同士は2方向に回動する構成になるが、主湾曲部6a全体としては上下方向及び左右方向の4方向に湾曲する構成になっている。
【0021】
そして、前記主湾曲部6aの先端部を構成する湾曲駒41を、前記連結駒40に軸用リベット42にて回動自在に連結する一方、この連結駒40の所定位置に主湾曲部6aを上下左右方向に湾曲操作するための第1湾曲操作ワイヤである主湾曲用ワイヤ43の一端部が固設されている。
【0022】
なお、符号44は湾曲駒41に固設した前記主湾曲用ワイヤ43が挿通するワイヤ受けである。また、主湾曲部6aの基端部を構成する湾曲駒41は、前記可撓管部7の先端部に設けられた連結管45に軸用リベット42にて回動自在に連結されている。さらに、前記連結管45の内周面所定位置には前記主湾曲用ワイヤ43を挿通するための第1コイルパイプである主コイルパイプ46の先端部が取り付けられている。この主コイルパイプ46内に挿通された主湾曲用ワイヤ43は、操作部3内を通じて他端部を前記主湾曲部操作ノブ20に固設している。このことにより、主湾曲部操作ノブ20を操作して主湾曲用ワイヤ43を牽引動作させることによって、主湾曲部6aが上下左右方向に湾曲する。
【0023】
次に、副湾曲部6bの構成を説明する。
【0024】
副湾曲部6bは、複数(ここでは4個とする)の湾曲駒41,41aとを前記主湾曲部6aと同様に軸方向へ配列させ、隣接する湾曲駒41,41同士を回動自在に連接している。つまり、前記副湾曲部6bの全長は、前記主湾曲部6aの全長よりも短く設定されている。なお、この副湾曲部6bも、前記主湾曲部6aと同様、隣接した湾曲駒41,41同士を一つおきに、上下位置と左右位置とに配置した軸用リベット42によって回動自在に連結している。
【0025】
この副湾曲部6bの基端部を構成する湾曲駒41は、前記連結駒40の先端側に軸用リベット42を用いて回動自在に連結されている。一方、前記副湾曲部6bの先端部であり、湾曲部最先端駒である先端湾曲駒41aの先端部を、前記先端部5を構成する先端部本体13に固設している。
【0026】
前記先端湾曲駒41aの内視鏡面所定位置には、副湾曲部6bを上下方向に湾曲操作するための第2湾曲操作ワイヤである副湾曲用ワイヤ47の一端部が上下2方向に固設されている。
【0027】
また、前記連結駒40の内周面所定位置には前記副湾曲用ワイヤ47を挿通するための第2コイルパイプである副コイルパイプ48の先端部が取り付けられている。この副コイルパイプ48内に挿通された副湾曲用ワイヤ47は、操作部3内を通じて他端部を前記副湾曲部操作ノブ21に固設している。このことにより、副湾曲部操作ノブ21を操作して副湾曲用ワイヤ47を牽引動作させることによって、副湾曲部6bが上下方向に湾曲する。
なお、本実施形態における上下方向の上方向とは観察窓11が配置されている面側をさす。
【0028】
上述のように構成した内視鏡1の作用を説明する。
本実施形態の内視鏡1の湾曲部6は、主湾曲部6aと副湾曲部6bとで構成され、副湾曲部6bの長さ寸法を主湾曲部6aの長さ寸法より短く設定してある。このため、図4(a)に示すように主湾曲部操作ノブ20を操作して主湾曲部6aを湾曲させて先端部5を移動させる場合に比べて、図4(b)に示すように副湾曲部操作ノブ21を操作して副湾曲部6bを湾曲させて先端部5を移動させた場合の方が先端部5の移動量が少なくなる。
【0029】
したがって、内視鏡1の先端部5を所定部位まで挿入して、先端部5と十二指腸乳頭とを最適な距離で正面視させる操作を行う際、まず、図5(a)に示すように主湾曲部6aを湾曲動作させて先端部5と十二指腸乳頭との間の距離の設定を行う。
【0030】
その後、図5(b)に示すように副湾曲部6bを湾曲動作させて先端部5の十二指腸乳頭に対する向きに対する微調整を行う。すると、先端部5と十二指腸乳頭との距離を大きく変化させることなく、先端部5の位置が変化して最適な正面視観察状態になる。
【0031】
このように、湾曲部を2方向に湾曲する副湾曲部と4方向に湾曲する主湾曲部とで構成し、かつ、副湾曲部の長さ寸法を、主湾曲部の長さ寸法より短く設定して、先端部と観察目的部位とを最適な距離で正面視させることができる。
【0032】
また、副湾曲部の湾曲操作を先端部の微調整用に限定することで、湾曲操作の複雑化を避けて、操作性を向上させることができる。
【0033】
さらに、主湾曲部の操作方向を上下左右の4方向に設定したことにより、通常の内視鏡操作と同じ操作が行うことができる。
【0034】
図6及び図7は本発明の第2実施形態にかかり、図6は湾曲部の構成を説明する図、図7は湾曲操作と先端部の位置との関係を説明する図である。
【0035】
図6に示すように本実施形態の挿入部2Aにおいては副湾曲部6bの構成が異なっている。つまり、前記第1実施形態で副湾曲部を4つの湾曲駒で構成したのに対し、本実施形態の副湾曲部6bでは先端湾曲駒41a、1つにしている。
【0036】
具体的には、前記連結駒40の先端側に3つの湾曲駒41を配設することなく、軸用リベット42を用いて先端湾曲駒41aを上下方向に回動自在に連結している。
【0037】
このことにより、先端部5を湾曲部6Aの湾曲操作と独立させたように操作可能であり、副湾曲部操作ノブ21を操作することによって、図7の破線に示すように先端部5と十二指腸乳頭との距離を保持した状態で、先端部5の方向だけを調整して最適な正面視観察状態になる。その他の構成は前記第1実施形態と同様であり同部材には同符合を付して説明を省略する。
【0038】
このように、連結駒から先端部までの長さを最短にして副湾曲部を構成することによって、先端部を方向変換させる際の角度は少なくなるが、先端部と目的観察部位との位置をほとんど変化させることなく先端部を目的観察部位に正面視させることができる。
【0039】
なお、本発明は、以上述べた実施形態のみに限定されるものではなく、発明の要旨を逸脱しない範囲で種々変形実施可能である。
【0040】
[付記]
以上詳述したような本発明の前記実施形態によれば、以下の如き構成を得ることができる。
【0041】
(1)内視鏡挿入部に、観察光学系を有する先端部と、内視鏡操作部に設けた第1湾曲部操作ノブの操作で第1湾曲操作ワイヤを進退移動させることによって湾曲動作する第1湾曲部及び前記先端部と前記第1湾曲部との間に配置されて内視鏡操作部に設けた第2湾曲部操作ノブの操作で第2湾曲操作ワイヤを進退移動させることによって湾曲動作する第2湾曲部で構成した湾曲部と、を有する内視鏡において
前記第1湾曲部の湾曲方向を4方向に設定する一方、前記第2湾曲部の湾曲方向を2方向に設定し、かつ前記第2湾曲部の長さ寸法を前記第1湾曲部の長さ寸法より短く設定した内視鏡。
【0042】
(2)前記観察光学系を構成する観察窓を前記先端部の側部に設けた付記1記載の内視鏡。
【0043】
(3)前記第1湾曲部と前記第2湾曲部とを連結駒を介して連結し、この連結駒の所定位置に第1湾曲操作ワイヤの一端部を固設し、湾曲部の最先端に位置して前記先端部に固定される先端湾曲駒の所定位置に第2湾曲操作ワイヤの一端部を固設した付記1記載の内視鏡。
【0044】
(4)内視鏡挿入部に、観察光学系を有する先端部と、この先端部に第2湾曲部、第1湾曲部の順で連設する湾曲部とを有する内視鏡において
前記第1湾曲部の湾曲方向を4方向に設定する一方、前記第2湾曲部の湾曲方向を2方向に設定し、かつ前記第2湾曲部の長さ寸法を前記第1湾曲部の長さ寸法より短く設定した内視鏡。
【0045】
(5)前記観察光学系を構成する観察窓を前記先端部の側部に設けた付記4記載の内視鏡。
【0046】
(6)前記第1湾曲部と前記第2湾曲部とを連結駒を介して連結し、この連結駒の所定位置に第1湾曲操作ワイヤの一端部を固設し、湾曲部の最先端に位置して前記先端部に固定される先端湾曲駒の所定位置に第2湾曲操作ワイヤの一端部を固設した付記4記載の内視鏡。
【0047】
【発明の効果】
以上説明したように本発明によれば、湾曲部を湾曲させる湾曲操作を行う際、内視鏡先端部と目的観察部位との間隔を適切な距離にする操作及び、この適切な距離を保持した状態で内視鏡先端部を目的観察部位に対して正面視させる操作が可能な内視鏡を提供することができる。
【図面の簡単な説明】
【図1】図1ないし図5は本発明の第1実施形態に係り、図1は内視鏡を説明する図
【図2】先端部の構成を説明する断面図
【図3】湾曲部の構成を説明する図
【図4】湾曲部の作用を説明する図
【図5】湾曲操作と先端部の位置との関係を説明する図
【図6】図6及び図7は本発明の第2実施形態にかかり、図6は湾曲部の構成を説明する図
【図7】湾曲操作と先端部の位置との関係を説明する図
【図8】内視鏡先端部を十二指腸内に挿入して湾曲操作している状態を示す図
【符号の説明】
1…内視鏡
5…先端部
6…湾曲部
6a…主湾曲部
6b…副湾曲部
7…可撓管部
20…主湾曲部操作ノブ
21…副湾曲部操作ノブ
40…連結駒
41…湾曲駒
41a…先端湾曲駒
43…主湾曲用ワイヤ
47…副湾曲用ワイヤ
代理人 弁理士 伊藤 進
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope for duodenum having a first bending portion and a second bending portion in an endoscope insertion portion.
[0002]
[Prior art]
Endoscopes include endoscopes having a rigid insertion portion and endoscopes having a flexible insertion portion. Some flexible endoscopes have a curved portion in the insertion portion. The bending portion is generally connected to a distal end portion constituting the distal end side of the insertion portion, and an operation wire extending from the bending portion is inserted into the insertion portion and provided at the operation portion. Is attached. Therefore, by appropriately operating the hand operation portion and moving the operation wire forward and backward, the bending portion is bent so that the distal end portion can be directed to a desired portion.
[0003]
For example, in Japanese Utility Model Publication No. 60-41207, a plurality of bending pieces are arranged in a row, adjacent bending pieces are connected to each other in a rotatable manner, and a net tube or a flexible tube body is provided on the outer periphery of the bending piece group. An endoscope having a curved portion configured by covering the same is shown.
[0004]
When a contrast medium is injected into the bile duct and pancreatic duct by endoscopically using the endoscope having the curved portion to perform X-ray contrast, a side-view type endoscope is usually used. A contrast tube is inserted into the duodenum via a treatment instrument channel provided in the endoscope, and the distal end of the contrast tube is inserted into the duodenal papilla. At this time, as shown in FIG. 8 (a diagram showing a state in which the distal end portion of the endoscope is inserted into the duodenum and is operated to bend), an endoscope having an observation window 91 constituting the observation optical system provided on the side surface. It is important that the distal end 90 be viewed from the duodenal papilla while maintaining an appropriate distance for easy observation and treatment.
[0005]
[Problems to be solved by the invention]
However, when the bending portion 92 is bent during observation to change the angle at which the duodenal papilla that is the observation target portion is observed, for example, the bending portion 92 is bent and the entire bending portion 92 is bent. As a result, the state shown by the solid line in the figure changes to the state shown by the broken line, and the distance from the duodenal papilla increases (or approaches), making it difficult to perform a front view while maintaining an appropriate distance.
[0006]
The present invention has been made in view of the above circumstances, and when performing a bending operation for bending the bending portion, an operation for setting an appropriate distance between the distal end portion of the endoscope and the target observation site, and this appropriate distance. It is an object of the present invention to provide an endoscope for duodenum capable of performing an operation of causing the distal end portion of the endoscope to be viewed from the front of the target observation site in a state where the endoscope is held.
[0007]
Duodenum endoscope of the present invention, the endoscope insertion portion, and the leading end of the observation window constituting the observation optical system provided on the side, the first bending portion operation knob provided on the endoscope operation portion The first bending portion that is bent by moving the first bending operation wire forward and backward by the operation of the first bending portion and the second bending portion that is disposed between the distal end portion and the first bending portion and is provided in the endoscope operation portion. A duodenoscope having a bending portion constituted by a second bending portion that is bent by moving the second bending operation wire forward and backward by operation of an operation knob, wherein the bending direction of the first bending portion is 4 In order to set the bending direction of the second bending portion to two directions and to finely adjust the length of the second bending portion , the first bending portion It is set shorter than the length dimension.
[0008]
According to this configuration, the first bending portion and the second bending portion can be appropriately connected using the first bending portion operation knob and the second bending portion operation knob without impairing the bending portion operability of a normal endoscope. By performing the bending operation, the front end portion is held at a predetermined distance from the target observation site and can be viewed from the front.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 5 relate to a first embodiment of the present invention, FIG. 1 is a diagram for explaining an endoscope, FIG. 2 is a cross-sectional view for explaining the configuration of a distal end portion, and FIG. 3 is for explaining the configuration of a bending portion. FIG. 4 is a diagram for explaining the action of the bending portion, and FIG. 5 is a diagram for explaining the relationship between the bending operation and the position of the tip portion.
[0010]
4A illustrates a state in which the main bending portion is bent and the tip portion is moved, and FIG. 4B illustrates a state in which the auxiliary bending portion is bent and the tip portion is moved. FIG. 5A is a diagram for explaining an operation example when setting the distance between the distal end portion and the duodenal papilla, and FIG. It is a figure explaining the example of operation at the time of making a front-end | tip part oppose a duodenal papilla.
[0011]
As shown in FIG. 1, an endoscope 1 according to this embodiment includes an elongated and flexible insertion portion 2 that is inserted into a body cavity, and an operation portion 3 that is connected to the proximal end portion of the insertion portion 2. The universal cord 4 is mainly composed of a universal cord 4 that extends from a side portion of the operation portion 3 and has a connector portion 4a that is detachably attached to a light source device (not shown) at a base end portion.
[0012]
The insertion portion 2 includes, in order from the distal end side, a bending portion 6 and a flexible tube portion 7 that are configured by a distal end portion 5, a secondary bending portion 6b that is a second bending portion, and a main bending portion 6a that is a first bending portion. It is configured by connecting.
[0013]
The tip 5 includes, for example, a tip main body (see reference numeral 13 in FIG. 2) formed of a metal member, and a tip insulating cover (see reference numeral 14 in FIG. 2) that covers and electrically insulates the tip main body 13. An observation window 11 that constitutes the observation optical system and an illumination window 12 that constitutes the illumination optical system are provided at the side of the tip 5, and a storage chamber 16 that accommodates the elevator 15 is provided. Yes.
[0014]
The storage chamber 16 communicates with a treatment instrument insertion channel (not shown) that passes through the insertion portion 2, and the storage chamber 16 also serves as a distal end opening 17 of the treatment instrument insertion channel. The operation unit 3 is provided with a treatment instrument insertion port 18 communicating with the treatment instrument insertion channel. For this reason, the distal end portion 9a of the treatment instrument 9 can be protruded from the storage chamber 16 by inserting the treatment instrument 9 such as a contrast tube into the treatment instrument insertion channel from the treatment instrument insertion port 18. At this time, the protruding direction of the distal end portion 9 a is adjusted by the elevator 15.
[0015]
The operation portion 3 includes a main bending portion operation knob 20 that is a first bending portion operation knob for bending the main bending portion 6a in the up and down direction and the left and right direction, and a second for bending the sub bending portion 6b in the up and down direction. A sub bending portion operation knob 21 which is a bending portion operation knob, and a treatment instrument raising lever 22 for performing the raising and lowering operation of the raising base 15 disposed in the storage chamber 16 are provided. Further, the operation unit 3 is provided with an air / water supply operation button 23, a suction operation button 24, various control switches 25 for controlling an external device, and the like.
[0016]
As shown in FIG. 2, the distal end portion 5 has the observation window 11, an objective lens unit 28 configured by fixing a plurality of various optical lenses 26 to a lens frame 27, and an imaging position of the objective lens unit 28. An observation optical system 30 that is disposed and configured by a solid-state imaging element 29 or the like that converts an observation image into an electric signal is incorporated.
[0017]
In this figure, since it is a side-view type endoscope 1, a prism 31 for changing the observation direction is arranged in the observation optical system 30. In addition to the observation optical system 30, the light guide 32 that constitutes an illumination optical system that supplies illumination light at the time of observation with the tip surface facing the illumination window 12, and the window surface of the observation window 11 An air / water nozzle 33 and the like for ejecting air and water are provided.
[0018]
Here, the structure of the bending portion 6 will be described with reference to FIG.
As shown in the figure, the bending portion 6 has a main bending portion 6a mainly used when the position of the distal end portion 5 is largely changed at the time of insertion or observation of an endoscope, and adjustment of the direction of the distal end portion 5 is delicately performed. The second bending portion 6b is used when the two bending portions 6a and 6b are connected by the connecting piece 40.
[0019]
First, the configuration of the main bending portion 6a will be described.
The main bending portion 6a has a plurality of (in this case, ten) bending pieces 41,..., 41 formed in an annular shape arranged in the axial direction, and the adjacent bending pieces 41, 41 are rotatably connected to each other. ing. At this time, in the main bending portion 6a, the adjacent bending pieces 41, 41 are alternately connected to each other by the shaft rivets 42 arranged at the upper and lower positions and the left and right positions.
[0020]
That is, the connecting position at the front and rear ends of each bending piece 41 is changed by 90 degrees with respect to the circumferential direction. Therefore, the bending pieces 41 and 41 connected by one shaft rivet 42 are configured to rotate in two directions, but the main bending portion 6a as a whole is configured to bend in four directions, the vertical direction and the horizontal direction. It has become.
[0021]
Then, the bending piece 41 constituting the distal end portion of the main bending portion 6a is rotatably connected to the connecting piece 40 by the shaft rivet 42, while the main bending portion 6a is provided at a predetermined position of the connecting piece 40. One end of a main bending wire 43 which is a first bending operation wire for bending operation in the vertical and horizontal directions is fixed.
[0022]
Reference numeral 44 denotes a wire receiver through which the main bending wire 43 fixed to the bending piece 41 is inserted. The bending piece 41 constituting the base end portion of the main bending portion 6a is rotatably connected to a connecting tube 45 provided at the distal end portion of the flexible tube portion 7 by a shaft rivet 42. Further, a tip end portion of a main coil pipe 46 that is a first coil pipe for inserting the main bending wire 43 is attached to a predetermined position on the inner peripheral surface of the connecting pipe 45. The main bending wire 43 inserted into the main coil pipe 46 has the other end thereof fixed to the main bending portion operation knob 20 through the operation portion 3. As a result, the main bending portion 6a is bent in the vertical and horizontal directions by operating the main bending portion operation knob 20 to pull the main bending wire 43.
[0023]
Next, the configuration of the auxiliary bending portion 6b will be described.
[0024]
The auxiliary bending portion 6b has a plurality (four here) of bending pieces 41, 41a arranged in the axial direction in the same manner as the main bending portion 6a, so that the adjacent bending pieces 41, 41 can rotate freely. It is connected. That is, the total length of the sub-curved portion 6b is set shorter than the total length of the main curved portion 6a. The sub-curved portion 6b, like the main curved portion 6a, is also rotatably connected by a shaft rivet 42 arranged at every other vertical position and left and right positions with each other adjacent bending pieces 41, 41. is doing.
[0025]
The bending piece 41 constituting the base end portion of the auxiliary bending portion 6b is rotatably connected to the distal end side of the connecting piece 40 by using a shaft rivet 42. On the other hand, the distal end portion of the distal bending piece 41a, which is the distal end portion of the auxiliary bending portion 6b and is the leading end of the bending portion, is fixed to the distal end portion body 13 constituting the distal end portion 5.
[0026]
One end portion of a secondary bending wire 47, which is a second bending operation wire for bending the secondary bending portion 6b in the vertical direction, is fixed in the vertical direction at a predetermined position on the endoscope surface of the distal bending piece 41a. ing.
[0027]
In addition, a distal end portion of a secondary coil pipe 48 that is a second coil pipe for inserting the secondary bending wire 47 is attached to a predetermined position on the inner peripheral surface of the connecting piece 40. The auxiliary bending wire 47 inserted into the auxiliary coil pipe 48 has the other end thereof fixed to the auxiliary bending portion operation knob 21 through the operation portion 3. As a result, the auxiliary bending portion 6b is bent in the vertical direction by operating the auxiliary bending portion operation knob 21 and pulling the auxiliary bending wire 47.
In the present embodiment, the upward direction in the vertical direction refers to the surface side on which the observation window 11 is arranged.
[0028]
The operation of the endoscope 1 configured as described above will be described.
The bending portion 6 of the endoscope 1 of the present embodiment includes a main bending portion 6a and a sub bending portion 6b, and the length dimension of the sub bending portion 6b is set shorter than the length dimension of the main bending portion 6a. is there. Therefore, as shown in FIG. 4B, the main bending portion operation knob 20 is operated to bend the main bending portion 6a and move the distal end portion 5 as shown in FIG. 4A. The amount of movement of the distal end portion 5 is smaller when the auxiliary bending portion operation knob 21 is operated to bend the auxiliary bending portion 6 b and move the distal end portion 5.
[0029]
Therefore, when the distal end portion 5 of the endoscope 1 is inserted up to a predetermined site and the front end portion 5 and the duodenal papilla are viewed from the front at an optimum distance, first, as shown in FIG. The bending portion 6a is bent to set the distance between the distal end portion 5 and the duodenal papilla.
[0030]
Thereafter, as shown in FIG. 5B, the sub-curvature portion 6b is bent to finely adjust the direction of the distal end portion 5 relative to the duodenal papilla. Then, without changing the distance between the distal end portion 5 and the duodenal papilla greatly, the position of the distal end portion 5 is changed to be in an optimal front view observation state.
[0031]
As described above, the bending portion is configured by the sub-curving portion that is bent in two directions and the main bending portion that is bent in four directions, and the length of the sub-curving portion is set shorter than the length of the main bending portion. Thus, the front end portion and the observation target portion can be viewed from the front at an optimum distance.
[0032]
Further, by limiting the bending operation of the auxiliary bending portion to the fine adjustment of the distal end portion, it is possible to avoid the complication of the bending operation and improve the operability.
[0033]
Furthermore, since the operation direction of the main bending portion is set to four directions, up, down, left, and right, the same operation as a normal endoscope operation can be performed.
[0034]
6 and 7 relate to the second embodiment of the present invention, FIG. 6 is a diagram for explaining the configuration of the bending portion, and FIG. 7 is a diagram for explaining the relationship between the bending operation and the position of the tip portion.
[0035]
As shown in FIG. 6, in the insertion part 2A of this embodiment, the structure of the subbending part 6b differs. That is, in the first embodiment, the auxiliary bending portion is constituted by four bending pieces, whereas in the auxiliary bending portion 6b of the present embodiment, one tip bending piece 41a is provided.
[0036]
Specifically, the distal bending piece 41a is pivotally connected in the vertical direction using the shaft rivet 42 without arranging the three bending pieces 41 on the distal end side of the connection piece 40.
[0037]
Accordingly, the distal end portion 5 can be operated independently of the bending operation of the bending portion 6A, and by operating the auxiliary bending portion operation knob 21, the distal end portion 5 and the duodenum as shown by the broken line in FIG. In a state where the distance from the nipple is maintained, only the direction of the distal end portion 5 is adjusted to obtain an optimal front view observation state. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted.
[0038]
Thus, by configuring the sub-curved portion with the shortest length from the connecting piece to the tip portion, the angle when changing the direction of the tip portion is reduced, but the position of the tip portion and the target observation site is changed. The tip can be viewed in front of the target observation site with almost no change.
[0039]
It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.
[0040]
[Appendix]
According to the embodiment of the present invention described in detail above, the following configuration can be obtained.
[0041]
(1) A bending operation is performed by moving the first bending operation wire forward and backward by operation of the distal end portion having the observation optical system and the first bending portion operation knob provided in the endoscope operation portion in the endoscope insertion portion. The first bending portion is bent by moving the second bending operation wire forward and backward by operation of a second bending portion operation knob disposed in the endoscope operation portion and disposed between the distal end portion and the first bending portion. In an endoscope having a bending portion constituted by a second bending portion that operates, the bending direction of the first bending portion is set in four directions while the bending direction of the second bending portion is set in two directions, An endoscope in which a length dimension of the second bending portion is set shorter than a length dimension of the first bending portion.
[0042]
(2) The endoscope according to appendix 1, wherein an observation window constituting the observation optical system is provided on a side portion of the distal end portion.
[0043]
(3) The first bending portion and the second bending portion are connected via a connecting piece, and one end of the first bending operation wire is fixed to a predetermined position of the connecting piece, and is positioned at the forefront of the bending portion. The endoscope according to appendix 1, wherein one end of the second bending operation wire is fixedly provided at a predetermined position of the distal bending piece fixed to the distal end.
[0044]
(4) In the endoscope having the distal end portion having the observation optical system in the endoscope insertion portion and the curved portion continuously provided in this distal end portion in the order of the second curved portion and the first curved portion. While the bending direction of the bending portion is set to four directions, the bending direction of the second bending portion is set to two directions, and the length dimension of the second bending portion is shorter than the length dimension of the first bending portion. Set endoscope.
[0045]
(5) The endoscope according to appendix 4, wherein an observation window constituting the observation optical system is provided on a side portion of the distal end portion.
[0046]
(6) The first bending portion and the second bending portion are connected via a connecting piece, and one end of the first bending operation wire is fixed to a predetermined position of the connecting piece, and is positioned at the forefront of the bending portion. The endoscope according to appendix 4, wherein one end of the second bending operation wire is fixedly provided at a predetermined position of the distal bending piece fixed to the distal end.
[0047]
【The invention's effect】
As described above, according to the present invention, when performing the bending operation for bending the bending portion, the operation for setting the distance between the endoscope distal end portion and the target observation site to an appropriate distance and the appropriate distance are maintained. It is possible to provide an endoscope capable of performing an operation of causing the distal end portion of the endoscope to be viewed in front of the target observation site in a state.
[Brief description of the drawings]
FIG. 1 to FIG. 5 relate to a first embodiment of the present invention, FIG. 1 is a view for explaining an endoscope, FIG. 2 is a cross-sectional view for explaining a configuration of a distal end portion, and FIG. FIG. 4 is a diagram for explaining the operation of the bending portion. FIG. 5 is a diagram for explaining the relationship between the bending operation and the position of the tip portion. FIG. 6 and FIG. FIG. 6 is a diagram illustrating the configuration of the bending portion according to the embodiment. FIG. 7 is a diagram illustrating the relationship between the bending operation and the position of the distal end. FIG. 8 is a diagram illustrating the insertion of the endoscope distal end into the duodenum. Diagram showing bending operation [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Endoscope 5 ... Front-end | tip part 6 ... Bending part 6a ... Main bending part 6b ... Sub bending part 7 ... Flexible pipe part 20 ... Main bending part operation knob 21 ... Sub bending part operation knob 40 ... Connecting piece 41 ... Bending Piece 41a ... End bending piece 43 ... Main bending wire 47 ... Secondary bending wire agent Patent attorney Susumu Ito

Claims (2)

内視鏡挿入部に、観察光学系を構成する観察窓を側部に設けた先端部と、内視鏡操作部に設けた第1湾曲部操作ノブの操作で第1湾曲操作ワイヤを進退移動させることによって湾曲動作する第1湾曲部及び前記先端部と前記第1湾曲部との間に配置されて内視鏡操作部に設けた第2湾曲部操作ノブの操作で第2湾曲操作ワイヤを進退移動させることによって湾曲動作する第2湾曲部で構成した湾曲部と、を有する十二指腸用内視鏡において
前記第1湾曲部の湾曲方向を4方向に設定する一方、前記第2湾曲部の湾曲方向を2方向に設定し、かつ前記第2湾曲部の長さ寸法を、前記先端部の向きを微調整するために、前記第1湾曲部の長さ寸法より短く設定したことを特徴とする十二指腸用内視鏡。
The endoscope insertion portion, forward and backward to the previous end of the observation window is provided on the side constituting the observation optical system, a first bending operation wire by operating the first bending portion operation knob provided on the endoscope operation portion The second bending operation wire is operated by operating a first bending portion that is bent between the first bending portion and the second bending portion operation knob that is disposed between the distal end portion and the first bending portion and provided in the endoscope operation portion. A duodeno endoscope having a bending portion configured by a second bending portion that performs a bending operation by advancing and retreating the first bending portion, while setting the bending direction of the first bending portion to four directions. The bending direction is set to two directions, and the length dimension of the second bending portion is set shorter than the length dimension of the first bending portion in order to finely adjust the direction of the tip portion. Endoscope for duodenum .
前記第2湾曲部は、前記湾曲部の最先端に位置して前記先端部に固定される少なくとも先端湾曲駒を備えることを特徴とする請求項1に記載の十二指腸用内視鏡。The duodenal endoscope according to claim 1, wherein the second bending portion includes at least a distal bending piece that is positioned at the forefront of the bending portion and is fixed to the distal end portion.
JP2001235423A 2001-08-02 2001-08-02 Duodenoscope Expired - Fee Related JP4081251B2 (en)

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JP4679241B2 (en) 2005-05-24 2011-04-27 オリンパスメディカルシステムズ株式会社 Endoscope
JP2007061377A (en) * 2005-08-31 2007-03-15 Fujinon Corp Endoscope
WO2011092899A1 (en) * 2010-01-28 2011-08-04 オリンパスメディカルシステムズ株式会社 Duodenoscope
JP5486953B2 (en) * 2010-02-19 2014-05-07 Hoya株式会社 Endoscope curvature
CN102770059A (en) * 2010-03-12 2012-11-07 奥林巴斯医疗株式会社 Endoscope
JP5927000B2 (en) * 2012-03-29 2016-05-25 オリンパス株式会社 Insertion equipment

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