JPH01212531A - Liquid ejector for endoscope - Google Patents

Liquid ejector for endoscope

Info

Publication number
JPH01212531A
JPH01212531A JP63037599A JP3759988A JPH01212531A JP H01212531 A JPH01212531 A JP H01212531A JP 63037599 A JP63037599 A JP 63037599A JP 3759988 A JP3759988 A JP 3759988A JP H01212531 A JPH01212531 A JP H01212531A
Authority
JP
Japan
Prior art keywords
pressure
air
valve
liquid
injection liquid
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
JP63037599A
Other languages
Japanese (ja)
Other versions
JP2611306B2 (en
Inventor
Mitsuo Kondo
光夫 近藤
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.)
Fujinon Corp
Original Assignee
Fuji Photo Optical 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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Priority to JP63037599A priority Critical patent/JP2611306B2/en
Publication of JPH01212531A publication Critical patent/JPH01212531A/en
Application granted granted Critical
Publication of JP2611306B2 publication Critical patent/JP2611306B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Landscapes

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

Abstract

PURPOSE:To enable ejection of required quantity of liquid with desired pressure by arranging a liquid ejection valve at the operating section of an endoscope then leading the pressure in an air piping into a pressure converter and pressure feeding the liquid toward an ejection port. CONSTITUTION:When an operational button 31a for a liquid ejection valve 31 arranged in an operating section 1 is depressed, a liquid flow-out path 32 is communicated with a liquid flow-in path 33 while communication between a pump side piping 17a and a valve side piping 17b of an air piping 17 is interrupted and an air pump 16 is blocked from the atmosphere to increase the pressure in an air piping 50, and a signal is fed from a pressure detector 4 to a valve control section 55 when the pressure in the air piping 50 reaches to a predetermined level. Consequently, a direction changeover valve 51 is switched to communicate a pressure lead-in pipe with the air piping 50, and thereby pressure is fed from the air pump 16 to the primary chamber 42 of a pressure converter 41 to boost the pressure in the secondary pressure chamber 43 thus ejecting high pressure liquid through an ejection port 30.

Description

【発明の詳細な説明】[Detailed description of the invention]

[発明の利用分野] 本発明は、大腸鏡等の内視鏡における洗浄液等の液体を
噴射するための液体噴射機構に関するものである。 [従来の技術] 大腸鏡等により体腔内の観察を行う場合において、膣壁
等に汚物等が付着していると、それを洗い流さなければ
、病変部の有無等に対する正確な検査を行うことができ
ないことになる。また、この大腸以外の検査を行うに当
っても、ylA部に血液等が付着していると、この血液
等を洗い流す必要がある。、かかる汚物等の洗い流しは
、洗浄液を噴射するごとにより行われるが、従来におい
ては、′一端部に注射筒等からなる洗浄液の圧送手段を
接続した長尺のチューブを用い、このチューブを処置具
挿通チャンネルに挿通して、圧送手段を作動させること
により、洗浄液の噴射を行うようにしていた。
[Field of Application of the Invention] The present invention relates to a liquid ejection mechanism for ejecting liquid such as cleaning liquid in an endoscope such as a colonoscope. [Prior Art] When observing the inside of a body cavity using a colonoscope, etc., if dirt or other substances adhere to the vaginal wall, it is difficult to accurately examine the presence or absence of a lesion unless it is washed away. It turns out you can't do it. Furthermore, when performing tests on areas other than the large intestine, if blood or the like adheres to the ylA region, it is necessary to wash away the blood or the like. Washing away such filth, etc. is performed by spraying cleaning fluid every time, but conventionally, a long tube with a cleaning fluid pumping means such as a syringe connected to one end is used, and this tube is connected to a treatment instrument. The cleaning liquid was sprayed by inserting the cleaning liquid into the insertion channel and activating the pressure feeding means.

【発明が解決しようとする問題点】[Problems to be solved by the invention]

ところで、洗浄液の噴射機構を前述のように構成すると
、汚物の洗い流し作業を行うためには、チューブを処置
具挿通チャンネルに挿通させるという煩わしい操作を行
わなければならず、また、このチューブを挿通させた後
においても、圧送手段を作動させることを必要とし、内
視鏡の操作を行いながらこれらの作業を行うのは困難で
あり、非常に手間を要するという難点がある。また、圧
送手段としては、注射筒等のような容積の小さいもので
あるために、特に大腸内の汚物の洗い流し等を十分に行
うことができる程度に洗浄液の噴射を行うことができな
い等の欠点がある。 本発明は叙上の点に鑑みてなされたものであっ工、その
目的とするところは、簡単な操作によって必要な量の洗
浄液等の液体を容易に噴射させることができるようにし
た内視鏡の液体噴射機構を提供することにある。 1問題点を解決するための手段l 前述した目的を達成するために、本発明は、挿入部の先
端に設けられ、観察対象部に向けて液体を噴射する噴射
口と、噴射液タンクに接続せれて、高圧の噴射液を送り
出すための圧力変換器との間の流路の途中に噴射液バル
ブを介装し、該噴射液バルブにエアポンプから送気送水
バルブに至るエア配管を接続し、前記噴射液バルブを前
記噴射口と圧力変換器との間が連通ずる状態に切り換え
たときに、前記エア配管におけるエアポンプと送気送水
バルブとの間の連通を遮断するようになし、このときに
おけるエア配管内の圧力を前記圧力変換器・の一次側圧
力室に導くことにより前記噴射口に供給する噴射液を圧
送する構成としたことをその特徴とするものである。
By the way, when the cleaning liquid injection mechanism is configured as described above, in order to wash away dirt, it is necessary to perform the troublesome operation of inserting the tube into the treatment instrument insertion channel. Even after this, it is necessary to operate the pumping means, and it is difficult and time-consuming to perform these operations while operating the endoscope. In addition, since the pressure-feeding means has a small volume such as a syringe, it has disadvantages such as not being able to spray enough cleaning liquid to sufficiently wash away dirt in the large intestine. There is. The present invention has been made in view of the above-mentioned points, and its purpose is to provide an endoscope that can easily spray a necessary amount of liquid such as cleaning liquid by simple operation. The purpose of the present invention is to provide a liquid ejection mechanism. 1. Means for Solving Problems 1 In order to achieve the above-mentioned object, the present invention provides a jetting port that is provided at the tip of the insertion section and that jets liquid toward the observation target area, and a jetting port that is connected to a jetting liquid tank. Then, an injection liquid valve is interposed in the flow path between the pressure transducer for sending out the high-pressure injection liquid, and an air piping from the air pump to the air and water supply valve is connected to the injection liquid valve. When the injection liquid valve is switched to a state where the injection port and the pressure converter communicate with each other, communication between the air pump and the air/water supply valve in the air piping is cut off, and at this time, The present invention is characterized in that the injection liquid supplied to the injection port is fed under pressure by guiding the pressure within the air pipe to the primary side pressure chamber of the pressure converter.

【作用1 噴射液バルブは、常時においては、噴射液タンクに接続
した圧力変換器と噴射口との間の連通、を遮断し、エア
ポンプと送気送水バルブとを連通させた状態とする。こ
れにより、挿入部の先端に設けた観察窓が体液等が付着
した場合において、該送気送水バルブを操作することに
よって、それに洗浄用の流体を供給して、その洗浄を支
障なく行うことができる。 一方、この噴射液バルブを圧力変換器と噴射口との間を
連通させる状態に切り換えると、エアポンプと送気送水
バルブとの間の接続が遮断されることになる。従っ°C
1該エアポンプにvL統した空気配管内の圧力が上昇す
る。この空気配管内の圧力は、圧力変換器の一次側圧力
室に導かれて、二次側の噴射液が増圧され、噴射液の流
路に圧送されて、噴射口から噴射させることができるよ
うになる。  、  、     、。 、このように、噴射液バルブを操作するだけで、洗浄液
の噴射を行わせる、ことができるようになるのマ、その
操作性が著しく自主する。しかも、この噴射液バルブを
、内視鏡の操作部において、送気送水バルブに隣接させ
て設けるようにすれば、内視鏡な把持する手の指で操作
を行うことができるよう−になるので、その操作性が極
めて良好となる。 を実施例、】 以下、本発明の実施例を図面に基づいて詳細に説明する
。 第1図乃至第3図は、本発明の第1の実施例を示すもの
であって、第1図において、1は内視鏡の操作部、2は
挿入部、3は光源装置、4は洗浄液タンク、5は噴射液
供給部をそれぞれ示す。 挿入部2の先端には、観察窓10が設けられており、該
観察窓10が汚損したときにおいて、その洗浄を行うた
めに、送気送水ノズル11が設けられている。該送気送
水ノズル11には送気送水管12が接続されており、こ
の送気送水管12は、挿入部2内における途中位置で送
気管13と送水管14とに分岐して、操作部1に設けら
れ、手指で操作可能な操作ボタン15aを有する送気送
水バルブ15に接続されている。また、該送気送水バル
ブ15には、光源装置3に内蔵したエアポンプ16から
のエア配管17と、洗浄液タンク4からの給水管18と
が接続されており、さらにこの送気送水バルブ15の操
作ボタン15aには大気開放部19か設けられている。 なお、図中に3いて、21は送気管13の途中に介装し
た逆止弁である。 従って、常時には送水管14と給水管18との連通が遮
断されると共に、エア配管17は大気開放部19を介し
て大気と連通し、送気送水ノズル11には送気も送水も
行われない送気送水停止状態となっているつそして、手
指で大気開放部19を閉塞すると、エア配’117は大
気との連通が遮断されて、エアポンプ15からの加圧空
気が送気管13に供給されて、送気送水管12を介して
送気送水ノズル11から観察窓10に向けて送り出され
る送気状態となる。 また、送気送水バルブ15を押し込むと、エア配管17
は大気開放部19とも送気管13とも遮断されると共に
、給水管18が送水管14と接続されるようになる。而
して、洗浄液タンク4には、エア配管17から分岐した
タンク加圧配管22が接続されており、エアポンプ16
からの加圧空気はこのタンク加圧配管22から洗浄液タ
ン−り4内に導かれて、該洗浄液タンク4の液面を加圧
することになって、給水管18から送水管14.送気送
水管12を順次介して送気送水ノズル11に送水を行う
送水状態に切り換わるように構成されている。従って、
内視鏡の操作中に観察窓lOが汚れて、観察が困難にな
ったときには、送気送水バルブ15を手指で操作するこ
とによって、送水して汚物等の洗い流しを行い、然る後
に送気することにより観察窓10に付着する水滴の除去
を行うようにすればよい。 一方、観察対象部における膣壁に汚物等が付着している
と正確な検査を行うことができないことになるために、
この観察対象部に付着する汚物等を洗い流すための液体
噴射機構を備えている。この液体噴射機構としては、挿
入部2の先端に形成した噴射口30を有し、該噴射口3
0から汚物に覆われた部分に向けての洗浄液の噴射を制
御するために、操作部1には送気送水バルブ15に隣接
した位置に操作ボタン31aを有する噴射液バルブ31
が設けられている。この噴射液バルブ31には、噴射口
30に通じる噴射液流出路32と、噴射液タンク4から
の噴射液供給路33とが接続され、該噴射液バルブ31
によって噴射液流出路32と噴射液供給路33との間を
連通・遮断することができるようになっている。 また、噴射液バルブ31には、エア配管17が接続され
ており、該噴射液バルブ31によって、エア配管17は
エアポンプ16に通じるポンプ側配管17aと送気送水
バルブ15に通じるバルブ側配管17bとに分けられて
いる。そして、該噴射液バルブ3】は、常時には噴射液
流出路32と噴射液供給路33との間の連通を遮断する
と共に、配管17a 、 17b間が連通した復帰状態
に保持されており、操作ボタン31aを手指で押し込む
と、噴射液流出路32と噴射液供給路33とが連通し、
配管17a 、 17b間の連通が遮断される作動状態
に切り換わるようになっている。 次に、噴射液供給部5の構成について説明する。この噴
射液供給部5は、噴射液供給タンク40と、該噴射液供
給タンク40から供給される噴射液を増圧するための圧
力変換器41とを備えている。 該圧力変換器41は、第2図に示したように、ケーシン
グ41a内を一次側圧力室42と、二次側圧力室43と
に区画形成し、、これら両圧力室42.43はそれぞれ
ダイヤフラム等の可撓隔壁44.45と、この可撓隔壁
449.45に連なる受圧部材46.47によって密閉
されており、受圧部材46.47間は連結杆48により
連結されて、それらは相互に連動して移動せしめられる
ようになっている。而して、一次側圧力室42の受圧部
材46は、二次側圧力室43の受圧部材47より大きな
受圧面積を有し、この受圧面積比に応じて二次側圧力室
43を増圧することができる構成となっている。また、
この圧“力変換器41は、常時には噴射液が導入される
二次側圧力室43が拡大した状態に保持されるようにな
っている。なお、この二次側圧力室43を確実に拡大さ
せた状態に保持するためには、復帰ばねを受圧部材に作
用させるようにしておけばよい。 二次側圧力室43には、噴射液供給タンク40からの低
圧配管49が接続されると共に、噴射液供給路33が接
続されている。一方、一次側圧力室42は空気圧が導入
されるようになっている。この空気圧はエアポンプ16
から供給されるものを利用するようになっており、この
ために、タンク加圧配管22がら空気配管50が分岐せ
しめられ、該空気配管50は方向切換弁51に接続され
ている。そして、この方向切換弁51は、空気配管50
を一次側圧力室43に通じる圧力導入管52に接続する
状態と、この空気配管50を噴射液供給タンク40を加
圧するための加圧配管53と連通させると共に、圧力導
入管52を大気に開放する状態との間に切り換え可能と
なっている。 ここで、方向切換弁51は常時には空気配管50が加圧
配管53と連通し、圧力導入管52を大気に開放する状
態に保持されるようになっており、空気配管50内が高
圧になると、空気配管50を圧力導入管52に接続し、
この圧力を一次側圧力室42に導くことができるように
なっている。このように空気配管50内の圧力に応じて
方向切換弁51の切り換えを行うために、該空気配管5
0の途中には圧力検出器54が設けられており、4の圧
力検出器54により空気配管50内が所定の圧力となっ
たことを検出したときに、その信号が弁コントロール部
55に入力され、この弁コントロール部55からの信号
に基づいて方向切換弁51を切り換えることができるよ
うに構成されている。さらに、圧力導入管52の途中に
は、レギュレータ56が設けられており、該レギュレー
タ56によって一次側圧力室42に供給される空気圧が
一定となるように制御されることになる。 そして、このレギュレータ56の設定圧は適宜変更調整
することができるようにな9ている。なお、図中におい
て、57は配管49の途中に設、けた逆と弁である。 本実施例は前述のように構成されるもので、次にその作
用について説明する。 内視鏡を操作して、患者の体内等を検査したり、治療を
行ったりするには、挿入部2を所定の挿入経路に沿って
挿入し、その先端部を観察対象部仲位置させて、その内
部に照明光を照射することによって、観察窓lOを介し
て検査を行うことができる。また、処置具挿通チャンネ
ルを介して鉗子等の処置具を挿入部2内に挿入すれば、
患部の摘出そ、の他の給蒸等を行うことができる。なお
、このときにおいて、光!装置3内に設けたエアボビプ
16は作動状態に保持しておくが、この操作部1に設け
た送気送水バルブ15及び噴射液バルブ31を第1図の
状態に保持しておけば、エアポンプISは大気と連通し
て、無負荷状態で作動することになる。 而して、体腔における膣壁に病変部があるか否かを検査
するには、この膣壁を直接観察する必要がある。然るに
、大腸等のように、膣壁に汚物等が付着していたり、ま
た膣壁に出血部があったりすると、正確な検査を行うこ
とかできないことになるために、このような汚物等を洗
い流さなければならない。 そこで、操作部1に設けた噴射液バルブ31の操作ボタ
ン31aを押し込むと、復帰状態からこの噴射液バルブ
31に接続した噴射液流出路32と噴射液流入路33と
の間か連通ずると共に、エア配管17におけるポンプ側
配管17aとバルブ側配管17bと間の連通か遮断され
る状態に切り換わることになる。この結果、エアポンプ
16は大気から遮断されるために、ポンプ側配管17a
内の圧力が上昇することになり、該ポンプ側配管17a
に連通ずる空気配管50内の圧力も上昇する。この空気
配管50には圧力検出器54が設けられているので、該
空気配管50内か所定め圧力となったときに、該圧力検
出器54により検出されて、この検出信号が弁コントロ
ール部55に入力される。 この結果、弁コントロール部55からの信号に基づいて
、方向切換弁51が空気配管50を加圧配管53と連通
ずる状態から圧力導入管52と連通する状態に切り換わ
って、エアポンプ16からの圧力かポンプ側配管17a
、空気配管50.方向切換弁51から、レギュレータ5
6により一定圧力となるように調整された上で、圧力導
入管52を介して圧力変換器41の一次側圧力室42に
導入されることになる。この圧力は受圧部材46に作用
して、該受圧部材46を一次側圧力室42が拡大する方
向に押圧し、該受圧部材46と連結杆48を介して連結
されている二次側圧力室43の受圧部材47を、該二次
側圧力室43が縮小する方向に変位させることになる。 この結果、受圧部材46と受圧部材47との受圧面積比
に応じて、二次側圧力室43か増圧されて、該二次側圧
力室43内の高圧噴射液か噴射液供給路33から、噴射
液バルブ31.噴射液供給路33を順次介して噴射口3
0に圧送されて、該噴射口30から噴出せしめられるこ
とになる。なお、このときに、エアポンプ16からの圧
力はタンク加圧配管22を介して洗浄液タンク4にも導
かれるが、送気送水バルブ15の作用によって、送気送
水ノズル11に送水されることはないことはいうまでも
ない。 前述した動作のタイミングは第3図に示した通りである
。 而して、この二次側圧力室43における噴射液か排出さ
れると、洗浄液の噴射が停止されることになるが、噴射
液バルブ31を復帰させると、方向切換弁51が空気配
管50を加圧配管53と接続させると共に、圧力導入管
52は大気と連通ずる状態に切り換わるので、噴射液供
給タンク40が加圧されて、低圧配管49から圧力変換
器41における二次側圧力室43内に噴射液が迅速に補
給されることになる。 従って、噴射液バルブ31を繰り返し操作すれば、その
都度洗浄すべき箇所に向けて間欠的に洗浄液を高圧噴射
させることができるようになり、汚物等を完全に洗い流
すまで洗浄液の噴射を行わせることができるようになる
。 また、観察窓10を洗浄するために、送気送水バルブ1
5を操作する場合には、噴射液バルブ31を、ポンプ側
配管17aとバルブ側配管17bとか連通し、かつ噴射
液流出路32と噴射液供給路33との連通を遮断した復
帰状態に保持して、該送気送水バルブ15を操作すれば
よい。この送気送水バルブ15を操作したときに、空気
配管50内の圧力が上昇するが、この圧力上昇により方
向切換弁51か切り換わっても、噴射液供給路33と噴
射液流出路32との間は遮断されているので、噴射液が
噴射口30から流れ出すことはない。また、送気送水時
における空気配管50の圧力より高い圧力状態となった
ときに、方向切換弁51か切り換わるように設定してお
けば、送気送水時にみだりに方向切換弁51か切り換わ
るのを防止することができるようになる。 次に、第4図に本考案の第2の実施例を示す。 同図において、第1図と同一または均等な構成要素につ
いては、同一の符号を付してその説明を省略するものと
する。 然るに、本実施例においては、前述した第1の実施例と
は異なり、噴射液供給部に方向切換弁は設けられておら
ず、空気配管52は直接レギュレータ56に接続されて
おり、該レギュレータ56からの圧力導入管52′が圧
力変換器60に接続されるようになっている。この圧力
変換器60は、その一次側圧力室61と二次側圧力室6
2とにそれぞれ受圧面積の異なる受圧部63a 、 6
3bを有する段付ピストン63が装着されており、この
段付ピストン63に復帰ばね64を作用させている。そ
して、一次側圧力室61には圧力導入管52’が接続さ
れ、また二次側圧力室62には低圧配管49及び噴射液
供給路33が接続されており、これら低圧配管49及び
噴射液供給路33にはそれぞれ逆止弁67、68を介装
するように構成している。 なお、第1の実施例とは異なり、空気配管50には圧力
検出器は設けられておらず、また噴射液タンク40には
加圧配管は接続されていない。さらに、送水管14には
補助送水管70が逆止弁71を介して接続されており、
この補助送水管70を介して洗浄液タンク4から供給さ
れる洗浄液より高圧の液体を観察窓lOに向けて供給す
ることができるようになっている。 前述のように構成すれば、噴射液バルブ31を作動状態
に切り換えることによって、エアポンプ16の圧力がレ
ギュレータ56の設定圧にまで上昇すると、この圧力が
圧力導入管52′を介して圧力変換器60における一次
側圧力室61内に導かれて、二次側圧力室62内の噴射
液を増圧させて、噴射口30に向けて圧送させることが
できるようになる。 一方、噴射液バルブ31を復帰させると、圧力変換器6
0における一次側圧力室61は大気と連通ずる状態とな
るので、復帰ばね64の作用によって段付ピストン63
が変位し、二次側圧力室62が負圧となって、噴出液タ
ンク40から噴出液が二次側圧力室62に補給されるこ
とになる。 なお、前述の各実施例においては、洗浄液を噴射させる
機構として説明したが、例えば色素散布タンクを噴射液
供給路33に接続すれば1色素散布機構として用いる等
、他の液体噴射機構としても用いることもできる。 【発明の効果l 以上詳述したように、本発明によれば、内視鏡の操作部
に噴射液バルブを設け、該噴射液バルブに噴射液の流路
な接続すると共に、エアポンプから送気送水バルブq至
るエア配管を接続し、噴射液バルブが噴射液流路を噴射
液供給部と噴射口との間を連通させる状態に切り換わっ
たときに、エアポンプと送気送水バルブとの間の連通を
遮断させるようになし、このときにおけるエア配管内の
圧力を圧力変換器に導入することによって、噴射液を噴
射口に向けて圧送させるように構成したので、Q射バル
ブを操作するだけの極めて簡単な操作により観察対象部
における洗浄すべき箇所等に、所望の圧力で、必要な量
だけの液体の噴射を行わせることができるようになる。
[Operation 1] The injection liquid valve normally cuts off communication between the pressure transducer connected to the injection liquid tank and the injection port, and keeps the air pump and the air/water supply valve in communication. As a result, if the observation window provided at the tip of the insertion tube is contaminated with bodily fluids, cleaning fluid can be supplied to the observation window by operating the air/water supply valve, and the cleaning can be performed without any problem. can. On the other hand, when the injection liquid valve is switched to a state where the pressure converter and the injection port are communicated with each other, the connection between the air pump and the air/water supply valve is cut off. Follow °C
1. The pressure inside the air pipe connected to the air pump increases. The pressure in this air piping is guided to the primary side pressure chamber of the pressure converter, and the injection liquid on the secondary side is increased in pressure, and is forced into the injection liquid flow path and can be injected from the injection port. It becomes like this. , , ,. In this way, the cleaning liquid can be sprayed simply by operating the injection liquid valve, which greatly improves the operability. Moreover, if this injection liquid valve is installed adjacent to the air and water supply valve in the operation section of the endoscope, it becomes possible to operate the endoscope with the fingers of the hand holding it. Therefore, the operability is extremely good. Embodiments] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. 1 to 3 show a first embodiment of the present invention. In FIG. 1, 1 is an endoscope operating section, 2 is an insertion section, 3 is a light source device, and 4 is a A cleaning liquid tank and 5 indicate an injection liquid supply section, respectively. An observation window 10 is provided at the distal end of the insertion section 2, and an air/water supply nozzle 11 is provided to clean the observation window 10 when it becomes soiled. An air and water pipe 12 is connected to the air and water nozzle 11, and the air and water pipe 12 branches into an air pipe 13 and a water pipe 14 at an intermediate position within the insertion section 2, and connects to the operating section. 1, and is connected to an air/water supply valve 15 having an operation button 15a that can be operated with fingers. Further, an air pipe 17 from an air pump 16 built into the light source device 3 and a water supply pipe 18 from the cleaning liquid tank 4 are connected to the air/water supply valve 15, and the air/water supply valve 15 is operated. An atmosphere opening part 19 is provided in the button 15a. In the figure, numeral 3 and 21 indicate a check valve interposed in the middle of the air pipe 13. Therefore, under normal conditions, communication between the water supply pipe 14 and the water supply pipe 18 is cut off, and the air pipe 17 is communicated with the atmosphere through the atmosphere opening part 19, so that neither air nor water is supplied to the air/water supply nozzle 11. When the air and water supply is stopped and the atmosphere opening section 19 is closed with a finger, the communication between the air pipe 117 and the atmosphere is cut off, and the pressurized air from the air pump 15 is supplied to the air pipe 13. Then, air is sent out from the air/water nozzle 11 toward the observation window 10 via the air/water pipe 12. Also, when the air and water supply valve 15 is pushed in, the air pipe 17
is cut off from both the atmosphere opening section 19 and the air supply pipe 13, and the water supply pipe 18 is connected to the water supply pipe 14. A tank pressurizing pipe 22 branched from the air pipe 17 is connected to the cleaning liquid tank 4, and an air pump 16
The pressurized air from the tank pressurizing pipe 22 is led into the cleaning liquid tank 4 to pressurize the liquid level of the cleaning liquid tank 4, and is then transferred from the water supply pipe 18 to the water supply pipe 14. It is configured to switch to a water supply state in which water is supplied to the air and water nozzles 11 via the air and water pipes 12 in sequence. Therefore,
If the observation window 1O becomes dirty during operation of the endoscope and observation becomes difficult, operate the air and water supply valve 15 with your fingers to supply water to wash away dirt, and then restart the air supply. By doing so, water droplets adhering to the observation window 10 may be removed. On the other hand, if there is dirt attached to the vaginal wall in the area to be observed, it will not be possible to conduct an accurate examination.
It is equipped with a liquid injection mechanism for washing away dirt and the like adhering to this observation target area. This liquid ejection mechanism has an ejection port 30 formed at the tip of the insertion portion 2.
In order to control the injection of cleaning liquid from zero to the area covered with dirt, the operation unit 1 includes an injection liquid valve 31 having an operation button 31a located adjacent to the air and water supply valve 15.
is provided. The injection liquid valve 31 is connected to an injection liquid outflow path 32 leading to the injection port 30 and an injection liquid supply path 33 from the injection liquid tank 4.
This allows communication and isolation between the injection liquid outflow path 32 and the injection liquid supply path 33. Further, an air pipe 17 is connected to the injection liquid valve 31, and the air pipe 17 is connected to a pump-side pipe 17a leading to the air pump 16 and a valve-side pipe 17b leading to the air/water supply valve 15. It is divided into The injection liquid valve 3] normally shuts off communication between the injection liquid outflow path 32 and the injection liquid supply path 33, and is maintained in a restored state in which the pipes 17a and 17b are in communication. When the button 31a is pressed with a finger, the injection liquid outflow path 32 and the injection liquid supply path 33 are brought into communication.
The state is switched to an operating state in which communication between the pipes 17a and 17b is cut off. Next, the configuration of the injection liquid supply section 5 will be explained. The injection liquid supply section 5 includes an injection liquid supply tank 40 and a pressure converter 41 for increasing the pressure of the injection liquid supplied from the injection liquid supply tank 40. As shown in FIG. 2, the pressure transducer 41 has a casing 41a partitioned into a primary pressure chamber 42 and a secondary pressure chamber 43, each of which has a diaphragm. It is sealed by flexible partition walls 44.45 and pressure receiving members 46.47 connected to the flexible partition walls 449.45, and the pressure receiving members 46.47 are connected by a connecting rod 48, so that they interlock with each other. It is designed so that it can be moved. Thus, the pressure receiving member 46 of the primary pressure chamber 42 has a larger pressure receiving area than the pressure receiving member 47 of the secondary pressure chamber 43, and the pressure of the secondary pressure chamber 43 can be increased in accordance with this pressure receiving area ratio. It is configured to allow. Also,
This pressure transducer 41 is configured such that the secondary pressure chamber 43 into which the injection liquid is normally introduced is maintained in an expanded state. In order to maintain this state, a return spring may be made to act on the pressure receiving member.A low pressure pipe 49 from the injection liquid supply tank 40 is connected to the secondary side pressure chamber 43, and The injection liquid supply path 33 is connected to it.On the other hand, air pressure is introduced into the primary side pressure chamber 42.This air pressure is supplied to the air pump 16.
For this purpose, an air pipe 50 is branched from the tank pressurizing pipe 22, and the air pipe 50 is connected to a directional control valve 51. This directional control valve 51 is connected to the air pipe 50.
is connected to the pressure introduction pipe 52 that communicates with the primary side pressure chamber 43, and this air pipe 50 is connected to the pressurization pipe 53 for pressurizing the injection liquid supply tank 40, and the pressure introduction pipe 52 is opened to the atmosphere. It is possible to switch between the two states. Here, the directional switching valve 51 is normally maintained in a state where the air pipe 50 communicates with the pressurizing pipe 53 and the pressure introduction pipe 52 is opened to the atmosphere, and when the inside of the air pipe 50 becomes high pressure. , connect the air pipe 50 to the pressure introduction pipe 52,
This pressure can be guided to the primary pressure chamber 42. In order to switch the directional control valve 51 according to the pressure inside the air pipe 50, the air pipe 50 is
A pressure detector 54 is provided in the middle of the air pipe 50, and when the pressure sensor 54 detects that a predetermined pressure has been reached in the air pipe 50, the signal is input to the valve control unit 55. The directional control valve 51 is configured to be able to be switched based on a signal from the valve control section 55. Further, a regulator 56 is provided in the middle of the pressure introduction pipe 52, and the regulator 56 controls the air pressure supplied to the primary pressure chamber 42 to be constant. The set pressure of this regulator 56 can be changed and adjusted as appropriate9. In addition, in the figure, 57 is a girder and a valve provided in the middle of the pipe 49. This embodiment is constructed as described above, and its operation will be explained next. To operate the endoscope to examine the inside of a patient's body or perform treatment, insert the insertion section 2 along a predetermined insertion path, and position the distal end between the parts to be observed. By irradiating the interior with illumination light, inspection can be performed through the observation window IO. In addition, if a treatment instrument such as forceps is inserted into the insertion section 2 through the treatment instrument insertion channel,
It is possible to remove the affected area and provide other steam supply. In addition, at this time, light! The air pump 16 provided in the device 3 is kept in an operating state, but if the air/water supply valve 15 and the injection liquid valve 31 provided in the operating section 1 are kept in the state shown in Fig. 1, the air pump IS will be in communication with the atmosphere and will operate under no-load conditions. Therefore, in order to examine whether or not there is a lesion on the vaginal wall in the body cavity, it is necessary to directly observe the vaginal wall. However, if there is filth, etc. attached to the vaginal wall, such as the large intestine, or if there is bleeding on the vaginal wall, it will be impossible to conduct an accurate examination. Must be washed away. Therefore, when the operation button 31a of the injection liquid valve 31 provided on the operation part 1 is pushed in, communication is established between the injection liquid outflow path 32 and the injection liquid inflow path 33 connected to the injection liquid valve 31 from the returned state, and Communication between the pump-side pipe 17a and the valve-side pipe 17b in the air pipe 17 is switched to a state where it is cut off. As a result, the air pump 16 is isolated from the atmosphere, so the pump side piping 17a
This causes the pressure inside the pump side pipe 17a to rise.
The pressure within the air pipe 50 communicating with the air also increases. Since the air piping 50 is provided with a pressure detector 54, when the pressure within the air piping 50 reaches a predetermined pressure, the pressure detector 54 detects the pressure, and this detection signal is sent to the valve control section 55. is input. As a result, based on the signal from the valve control unit 55, the directional control valve 51 switches from communicating the air pipe 50 with the pressurizing pipe 53 to communicating with the pressure introduction pipe 52, thereby increasing the pressure from the air pump 16. Or pump side piping 17a
, air piping 50. From the directional control valve 51 to the regulator 5
6, the pressure is adjusted to a constant pressure, and then introduced into the primary pressure chamber 42 of the pressure transducer 41 via the pressure introduction pipe 52. This pressure acts on the pressure receiving member 46 and presses the pressure receiving member 46 in the direction in which the primary side pressure chamber 42 expands, and the secondary side pressure chamber 43 is connected to the pressure receiving member 46 via the connecting rod 48. The pressure receiving member 47 is displaced in the direction in which the secondary pressure chamber 43 is reduced. As a result, the pressure in the secondary side pressure chamber 43 is increased according to the pressure receiving area ratio of the pressure receiving member 46 and the pressure receiving member 47, and the high pressure injection liquid in the secondary side pressure chamber 43 is transferred from the injection liquid supply path 33. , injection liquid valve 31. The injection port 3 sequentially passes through the injection liquid supply path 33.
0 and is ejected from the injection port 30. Note that at this time, the pressure from the air pump 16 is also guided to the cleaning liquid tank 4 via the tank pressure piping 22, but due to the action of the air and water supply valve 15, water is not sent to the air and water supply nozzle 11. Needless to say. The timing of the above-mentioned operation is as shown in FIG. When the injection liquid in the secondary pressure chamber 43 is discharged, the injection of the cleaning liquid is stopped, but when the injection liquid valve 31 is reset, the directional control valve 51 closes the air pipe 50. Since the pressure introduction pipe 52 is connected to the pressure pipe 53 and switched to a state where it communicates with the atmosphere, the injection liquid supply tank 40 is pressurized, and the secondary pressure chamber 43 in the pressure converter 41 is connected from the low pressure pipe 49. The injection liquid will be quickly replenished within the tank. Therefore, by repeatedly operating the injection liquid valve 31, it is possible to intermittently inject the cleaning liquid at high pressure toward the area to be cleaned each time, and the cleaning liquid can be sprayed until the dirt, etc. is completely washed away. You will be able to do this. In addition, in order to clean the observation window 10, the air and water supply valve 1
5, the injection liquid valve 31 is maintained in a restored state in which the pump side piping 17a and the valve side piping 17b are communicated with each other, and the injection liquid outflow path 32 and the injection liquid supply path 33 are disconnected from each other. Then, the air/water supply valve 15 may be operated. When this air and water supply valve 15 is operated, the pressure inside the air pipe 50 increases, but even if the directional control valve 51 is switched due to this pressure increase, the injection liquid supply path 33 and the injection liquid outflow path 32 are connected to each other. Since the gap is blocked, the injection liquid will not flow out from the injection port 30. Furthermore, if the directional control valve 51 is set to switch when the pressure in the air piping 50 becomes higher than the pressure in the air piping 50 during air and water supply, the directional control valve 51 will not be switched inadvertently during air and water supply. It will be possible to prevent this. Next, FIG. 4 shows a second embodiment of the present invention. In this figure, the same or equivalent components as in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted. However, in this embodiment, unlike the first embodiment described above, the injection liquid supply section is not provided with a directional control valve, and the air pipe 52 is directly connected to the regulator 56. A pressure inlet pipe 52' from the pressure transducer 60 is connected to the pressure transducer 60. This pressure transducer 60 has a primary pressure chamber 61 and a secondary pressure chamber 6.
2 and pressure receiving parts 63a and 6 having different pressure receiving areas, respectively.
A stepped piston 63 having a diameter of 3b is mounted, and a return spring 64 acts on this stepped piston 63. A pressure introduction pipe 52' is connected to the primary pressure chamber 61, and a low pressure pipe 49 and an injection liquid supply path 33 are connected to the secondary pressure chamber 62. The passages 33 are each provided with check valves 67 and 68. Note that, unlike the first embodiment, the air pipe 50 is not provided with a pressure detector, and the injection liquid tank 40 is not connected to a pressurizing pipe. Further, an auxiliary water pipe 70 is connected to the water pipe 14 via a check valve 71,
A higher pressure liquid than the cleaning liquid supplied from the cleaning liquid tank 4 can be supplied to the observation window 10 through this auxiliary water pipe 70. With the configuration described above, when the pressure of the air pump 16 rises to the set pressure of the regulator 56 by switching the injection liquid valve 31 to the operating state, this pressure is transferred to the pressure converter 60 via the pressure introduction pipe 52'. The injection liquid is guided into the primary pressure chamber 61 in the secondary pressure chamber 62 and can be pressure-increased and force-fed toward the injection port 30. On the other hand, when the injection liquid valve 31 is reset, the pressure transducer 6
Since the primary pressure chamber 61 at 0 is in communication with the atmosphere, the stepped piston 63 is moved by the action of the return spring 64.
is displaced, the secondary pressure chamber 62 becomes a negative pressure, and the secondary pressure chamber 62 is replenished with the ejected liquid from the ejected liquid tank 40. In each of the above-mentioned embodiments, the mechanism was described as a mechanism for spraying the cleaning liquid, but it can also be used as a single pigment spraying mechanism by connecting a dye dispersion tank to the spray liquid supply path 33, or for other liquid spray mechanisms. You can also do that. Effects of the Invention 1 As described in detail above, according to the present invention, the injection liquid valve is provided in the operating section of the endoscope, the injection liquid flow path is connected to the injection liquid valve, and air is supplied from the air pump. When the air piping leading to the water supply valve q is connected and the injection liquid valve is switched to the state where the injection liquid flow path communicates between the injection liquid supply part and the injection port, the air piping between the air pump and the air and water supply valve is The communication is cut off, and the pressure inside the air piping at this time is introduced into the pressure transducer to force the injection liquid toward the injection port, so all you have to do is operate the Q injection valve. With an extremely simple operation, it becomes possible to spray the required amount of liquid at the desired pressure onto the area to be cleaned in the observation target area.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図乃至第3図は本発明の第1の実施例を示し、第1
図は内1!L鏡9鏡体流供給システムを示す説明図、第
2図は圧力変換器の構成説明図、第3図は洗浄液噴射機
構の動作タイミング図、第4図は本発明の第2の実施例
を示す内視鏡の流体供給システムの説明図である。 1:操作部、2:挿入部、4;洗浄液タンク、5::噴
射液供給部、10:観察窓、11:送気送水ノズル、1
2:送気送水管、13:送気管、14:送水管、15:
送気送水バルブ、16:−エアポンプ、17;エア配管
、17a:ポンプ側配管、17b :バルブ側配管、3
0:噴射9.31:噴射液バルブ、32:噴射液流出路
、33:噴射液供給路、40:噴射液供給タンク、41
.60:圧力変換器、41.61ニ一次側圧力室、42
、62:二次側圧力室、 44.45:可撓隔壁、4δ
。 47:受圧部材、49:低圧配管、50:空気配管、5
に方向切換弁、52.52’  :圧力導入管、53:
加圧配管、54:圧力検出器、55:弁コントロール部
、56:レギュレータ、63:段付ピストン、64:復
帰ばね。
1 to 3 show a first embodiment of the present invention.
The figure is 1 inside! An explanatory diagram showing the L mirror 9 mirror body flow supply system, Fig. 2 is an explanatory diagram of the configuration of the pressure transducer, Fig. 3 is an operation timing diagram of the cleaning liquid injection mechanism, and Fig. 4 is a diagram showing the second embodiment of the present invention. FIG. 2 is an explanatory diagram of the fluid supply system of the endoscope shown in FIG. 1: Operation section, 2: Insertion section, 4: Cleaning liquid tank, 5: Jetting liquid supply section, 10: Observation window, 11: Air and water supply nozzle, 1
2: Air and water pipe, 13: Air pipe, 14: Water pipe, 15:
Air and water supply valve, 16: - Air pump, 17; Air piping, 17a: Pump side piping, 17b: Valve side piping, 3
0: Injection 9.31: Injection liquid valve, 32: Injection liquid outflow path, 33: Injection liquid supply path, 40: Injection liquid supply tank, 41
.. 60: Pressure transducer, 41.61 Primary side pressure chamber, 42
, 62: Secondary pressure chamber, 44.45: Flexible partition, 4δ
. 47: Pressure receiving member, 49: Low pressure piping, 50: Air piping, 5
Directional switching valve, 52. 52': Pressure introduction pipe, 53:
Pressure piping, 54: pressure detector, 55: valve control section, 56: regulator, 63: stepped piston, 64: return spring.

Claims (2)

【特許請求の範囲】[Claims] (1)挿入部の先端に設けられ、観察対象部に向けて液
体を噴射する噴射口と、噴射液タンクに接続されて、高
圧の噴射液を送り出す圧力変換器との間の流路の途中に
噴射液バルブを介装し、該噴射液バルブにエアポンプか
ら送気送水バルブに至るエア配管を接続し、前記噴射液
バルブを前記噴射口と圧力変換器との間が連通する状態
に切り換えたときに、前記エア配管におけるエアポンプ
と送気送水バルブとの間の連通を遮断するようになし、
このときにおけるエア配管内の圧力を前記圧力変換器の
一次側圧力室に導くことにより前記噴射口に供給する噴
射液を圧送する構成としたことを特徴とする内視鏡の洗
浄液噴射機構。
(1) In the middle of the flow path between the injection port, which is provided at the tip of the insertion section and injects liquid toward the observation target, and the pressure transducer, which is connected to the injection liquid tank and sends out high-pressure injection liquid. An injection liquid valve was interposed in the injection liquid valve, an air pipe from an air pump to an air supply and water supply valve was connected to the injection liquid valve, and the injection liquid valve was switched to a state where the injection port and the pressure converter communicated with each other. when the communication between the air pump and the air/water supply valve in the air piping is cut off;
A cleaning liquid injection mechanism for an endoscope, characterized in that the pressure in the air piping at this time is guided to the primary side pressure chamber of the pressure converter to forcefully feed the injection liquid to be supplied to the injection port.
(2)前記エア配管を前記噴射液タンクに接続する状態
と、前記圧力変換器の一次側圧力室に接続する状態と間
に切り換える方向切換弁に接続し、圧力検出手段によっ
て前記エア配管内の圧力が上昇したことを検出したとき
に、該エア配管を前記一次側圧力室と接続する状態に切
り換えるように構成したことを特徴とする請求項(1)
の内視鏡の洗浄液噴射機構。
(2) Connecting the air piping to a directional control valve that switches between connecting the air piping to the injection liquid tank and connecting it to the primary pressure chamber of the pressure converter, and detecting the pressure inside the air piping by pressure detection means. Claim (1) characterized in that the air piping is configured to be connected to the primary pressure chamber when it is detected that the pressure has increased.
Cleaning fluid injection mechanism for endoscopes.
JP63037599A 1988-02-22 1988-02-22 Endoscope liquid ejection mechanism Expired - Fee Related JP2611306B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63037599A JP2611306B2 (en) 1988-02-22 1988-02-22 Endoscope liquid ejection mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63037599A JP2611306B2 (en) 1988-02-22 1988-02-22 Endoscope liquid ejection mechanism

Publications (2)

Publication Number Publication Date
JPH01212531A true JPH01212531A (en) 1989-08-25
JP2611306B2 JP2611306B2 (en) 1997-05-21

Family

ID=12502036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63037599A Expired - Fee Related JP2611306B2 (en) 1988-02-22 1988-02-22 Endoscope liquid ejection mechanism

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928940A (en) * 1982-08-09 1984-02-15 旭光学工業株式会社 Water sending apparatus of endoscope
JPS62132001A (en) * 1985-12-03 1987-06-15 Diesel Kiki Co Ltd High pressure generator
JPS62108601U (en) * 1985-12-26 1987-07-11

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928940A (en) * 1982-08-09 1984-02-15 旭光学工業株式会社 Water sending apparatus of endoscope
JPS62132001A (en) * 1985-12-03 1987-06-15 Diesel Kiki Co Ltd High pressure generator
JPS62108601U (en) * 1985-12-26 1987-07-11

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