JP2005253543A - 内視鏡の送水路 - Google Patents

内視鏡の送水路 Download PDF

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JP2005253543A
JP2005253543A JP2004066472A JP2004066472A JP2005253543A JP 2005253543 A JP2005253543 A JP 2005253543A JP 2004066472 A JP2004066472 A JP 2004066472A JP 2004066472 A JP2004066472 A JP 2004066472A JP 2005253543 A JP2005253543 A JP 2005253543A
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JP4448348B2 (ja
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Tomohiro Mori
智洋 森
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Pentax Corp
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Abstract

【課題】観察窓洗浄用管路と被写体洗浄用管路とが併設されていても挿入部が太くならず、内視鏡検査を受ける人が楽に検査を受けることができる内視鏡の送水路を提供すること。
【解決手段】挿入部1内に、観察窓洗浄用管路14と被写体洗浄用管路15の双方に連通する一本の送水管路11を挿通配置して、その送水管路11から観察窓洗浄用管路14と被写体洗浄用管路15とに分岐する分岐部12を挿入部1の先端付近に配置し、分岐部12より被写体洗浄用管路15側に、通常は閉じていて送水管路11から一定の圧力を越える高圧で送水が行われることにより開く圧力開放弁10を配置した。
【選択図】 図1

Description

この発明は内視鏡の送水路に関する。
内視鏡の挿入部の先端に配置された観察窓の表面に体内の粘液や汚液等が付着すると良好な内視鏡観察を行うことができなくなるので、消化器内検査用の内視鏡には観察窓の表面に向かって洗浄水を吹き付けるための観察窓洗浄用管路が設けられている。
また、大腸内検査用の内視鏡等においては、検査対象である粘膜面に便等が付着してその部分を内視鏡観察できない場合があるので、観察視野の方向に向かって洗浄水を吹き付けるための被写体洗浄用管路が挿入部の先端に併設されている(例えば、特許文献1)。
特開平8−238214
しかし、上述のような従来の内視鏡の送水路においては、観察窓洗浄用管路のための送水チューブと被写体洗浄用管路のための副送水チューブの二本の送水チューブが挿入部内の全長にわたって挿通配置されているので、挿入部全体が太くなって、内視鏡検査を受ける人に与える苦痛が大きくなる欠点があった。
そこで本発明は、観察窓洗浄用管路と被写体洗浄用管路とが併設されていても挿入部が太くならず、内視鏡検査を受ける人が楽に検査を受けることができる内視鏡の送水路を提供することを目的とする。
上記の目的を達成するため、本発明の内視鏡の送水路は、挿入部の先端に観察窓が配置されると共に、観察窓の表面に向かって洗浄水を吹き付けるための観察窓洗浄用管路と、観察窓前方の観察視野の方向に向かって洗浄水を吹き付けるための被写体洗浄用管路とが挿入部の先端に併設された内視鏡の送水路において、挿入部内に、観察窓洗浄用管路と被写体洗浄用管路の双方に連通する一本の送水管路を挿通配置して、その送水管路から観察窓洗浄用管路と被写体洗浄用管路とに分岐する分岐部を挿入部の先端付近に配置し、分岐部より被写体洗浄用管路側に、通常は閉じていて送水管路から一定の圧力を越える高圧で送水が行われることにより開く圧力開放弁を配置したものである。
本発明によれば、挿入部の先端部分には観察窓洗浄用管路と被写体洗浄用管路とが併設されていても、挿入部全体には一本の送水管路しか挿通配置されていないので、挿入部が先端部分を除いて太くならず、内視鏡検査を受ける人が楽に検査を受けることができる。
挿入部内に、観察窓洗浄用管路と被写体洗浄用管路の双方に連通する一本の送水管路を挿通配置して、その送水管路から観察窓洗浄用管路と被写体洗浄用管路とに分岐する分岐部を挿入部の先端付近に配置し、分岐部より被写体洗浄用管路側に、通常は閉じていて送水管路から一定の圧力を越える高圧で送水が行われることにより開く圧力開放弁を配置する。
図面を参照して本発明の実施例を説明する。
図1は、本発明の第1の実施例の内視鏡の送水路を示しており、細長い可撓管状の内視鏡挿入部1の先端に連結された先端部本体2の先端面には、観察窓3が配置されていて、その観察窓3の前方が被写体として内視鏡観察される観察視野になっている。
そして、先端部本体2には、観察窓3の表面に向かって開口する観察窓洗浄用ノズル4と、観察窓3と並んで前方の被写体の方向に開口する被写体洗浄用ノズル5とが設けられている。観察窓3の奥には、対物光学系6による被写体の投影位置に固体撮像素子7が配置されている。
内視鏡挿入部1内には、全長にわたって一本の送水チューブ11(送水管路)が挿通配置されていて、先端部本体2の後端部付近に設けられた分岐部12において、観察窓洗浄用ノズル4に連通する観察窓洗浄用管路14と、被写体洗浄用ノズル5に連通する被写体洗浄用管路15とに分岐されている。
そして、被写体洗浄用管路15内の分岐部12に近接した位置に、通常は閉じていて送水チューブ11から一定の圧力を越える高圧で送水が行われることにより開く圧力開放弁10が配置されている。この実施例の圧力開放弁10は、弾力性のあるゴム材により下流側に向かって凸の山形に形成されて、その中央部分に切り込みが貫通形成された構成になっている。
このような構成により、内視鏡挿入部1の基端に連結された図示されていない操作部から、圧力開放弁10が開かない程度の圧力で送水が行われると、図2に示されるように、送水チューブ11を経由して送られてきた洗浄水の殆ど全てが、被写体洗浄用管路15へは行かずに、観察窓洗浄用管路14を経由して観察窓洗浄用ノズル4から観察窓3の表面に吹き付けられる。
そして、圧力開放弁10を開かせる程度の高圧で操作部から送水が行われると、図3に示されるように、送水チューブ11を経由して送られてきた洗浄水の多くが、開いた圧力開放弁10から被写体洗浄用管路15を経由して被写体洗浄用ノズル5から前方の観察視野中の被写体に向かって吹き付けられる。
このようにして、本発明においては、先端部本体2には観察窓洗浄用管路14と被写体洗浄用管路15とが併設されているものの、内視鏡挿入部1内には送水チューブ11が一本しか挿通配置されていないので、内視鏡挿入部1が太くならない。
なお、本発明は上記実施例に限定されるものではなく、例えば図4に示されるように、圧力開放弁10を、下流側から上流側に向かってスプリングで付勢された弁体等で構成しても差し支えない。
本発明の第1の実施例の内視鏡の送水路の側面断面図である。 本発明の第1の実施例の内視鏡の送水路の観察窓を洗浄している状態の側面断面図である。 本発明の第1の実施例の内視鏡の送水路の被写体を洗浄している状態の側面断面図である。 本発明の第2の実施例の内視鏡の送水路の側面断面図である。
符号の説明
1 内視鏡挿入部
2 先端部本体
3 観察窓
4 観察窓洗浄用ノズル
5 被写体洗浄用ノズル
10 圧力開放弁
11 送水チューブ(送水管路)
12 分岐部
14 観察窓洗浄用管路
15 被写体洗浄用管路

Claims (1)

  1. 挿入部の先端に観察窓が配置されると共に、上記観察窓の表面に向かって洗浄水を吹き付けるための観察窓洗浄用管路と、上記観察窓前方の観察視野の方向に向かって洗浄水を吹き付けるための被写体洗浄用管路とが上記挿入部の先端に併設された内視鏡の送水路において、
    上記挿入部内に、上記観察窓洗浄用管路と上記被写体洗浄用管路の双方に連通する一本の送水管路を挿通配置して、その送水管路から上記観察窓洗浄用管路と上記被写体洗浄用管路とに分岐する分岐部を上記挿入部の先端付近に配置し、上記分岐部より上記被写体洗浄用管路側に、通常は閉じていて上記送水管路から一定の圧力を越える高圧で送水が行われることにより開く圧力開放弁を配置したことを特徴とする内視鏡の送水路。
JP2004066472A 2004-03-10 2004-03-10 内視鏡の送水路 Expired - Fee Related JP4448348B2 (ja)

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