JP3571434B2

JP3571434B2 - Medical connector device

Info

Publication number: JP3571434B2
Application number: JP28618295A
Authority: JP
Inventors: 正信小板橋
Original assignee: Olympus Corp
Current assignee: Olympus Corp
Priority date: 1995-11-02
Filing date: 1995-11-02
Publication date: 2004-09-29
Anticipated expiration: 2015-11-02
Also published as: JPH09122082A

Description

【０００１】
【発明の属する技術分野】
本発明は医療用内視鏡等の医療用電気器具と接続されたケーブルのコネクタと、このコネクタが着脱自在で接続され、駆動装置のコネクタ受けとを有する医療用コネクタ装置に関する。
【０００２】
【従来の技術】
従来技術１として信号処理装置の信号伝送ケーブル用コネクタ受けは患者回路となるために絶縁材を介して筐体シャーシに固定され、該コネクタ受け外周部には信号伝送ケーブルのコネクタと確実かつ容易に固定するカム溝ロック構造のためのカムピンを設けている信号伝送ケーブル固定筒（或いはコネクタ固定筒）が配置されている。
【０００３】
このコネクタ固定筒は信号伝送ケーブルのコネクタを装着した際の耐電圧を保つために大地、１次回路及び２次回路とは電気的に絶縁され、また信号伝送ケーブル用コネクタ受けを覆う事により信号処理装置に信号伝送ケーブルのコネクタが装着されていない状態で患者回路に接続された信号伝送ケーブル用コネクタ受けを容易に触れない様にする目的もあるために、患者回路からも電気的に絶縁されている。
【０００４】
従来技術２として実願昭６０−１１３７０３号に示す様に通信ケーブルが接続されている電子回路基板から輻射される電磁波ノイズをシールドするために、通信ケーブルを通すための凹状の開口部を設けたシールドケースでシールドしていた。
【０００５】
また他の従来技術としては、特願昭６０−１４７１８５に示す様に通信ケーブルが接続されている電子回路基板から輻射される電磁波ノイズをシールドするために、通信ケーブルを通すための開口部と、開口部を閉塞する導電性弾性部材を設けたシールドケースでシールドしていた。
【０００６】
また他の従来技術としては、電子回路基板に接続されている通信ケーブルを導電性金属筒で覆い、通信ケーブルを覆った導電性金属筒と電子回路基板とを前記導電性金属筒の端部を突出する形で導電性金属板よりなるシールドケースで覆い電子回路基板より輻射される電磁波ノイズをシールドしていた。
【０００７】
【発明が解決しようとする課題】
従来技術１の場合、信号伝送ケーブル用コネクタ受けの外周部に位置しているコネクタ固定筒が大地、１次回路及び２次回路、さらに患者回路とも電気的に絶縁されているため信号伝送ケーブルのコネクタを装着し、信号処理装置と内視鏡側の信号伝送ケーブルとの間に信号が流れた場合、コネクタ固定筒が電気的に不安定となり、コネクタ固定筒に伝導した電磁波ノイズがコネクタ固定筒より輻射されてしまう可能性があった。
【０００８】
従来技術２の実願昭６０−１１３７０３号の問題点は、シールドケースの通信ケーブルを通す凹状の開口部から電子回路基板よりの電磁波ノイズが輻射され易く、且つ電子回路基板よりの電磁ノイズが通信ケーブルに伝導し、通信ケーブルより電磁波ノイズが輻射され易かった。
【０００９】
従来技術２の特願昭６０−１４７１８５号の問題点は、通信ケーブルを通すための開口部が導電性弾性部材で閉塞されているが、電子回路基板よりの電磁波ノイズが通信ケーブルに伝導し通信ケーブルより電磁波ノイズが輻射され易いのは実願昭６０−１１３７０３と同様である。
【００１０】
従来技術２とその他の従来技術の問題点は電子回路基板と導電性金属筒とを導電性金属筒の端部を突出する形で一体的に導電性金属板よりなるシールドケースで覆っているだけなので導電性金属筒とシールドケースの導電性金属筒の開口部に空間が生じ、その空間から電子回路基板よりの電磁波ノイズが輻射される可能性があった。
【００１１】
本発明は上述した点に鑑みてなされたもので、本発明の第１の目的はコネクタ受けの外周部に配置されるコネクタ固定筒或いは導電性筒体から電磁波ノイズが輻射されることを防止できる医療用コネクタ装置を提供することにある。
【００１２】
本発明の第２の目的は通信ケーブルを覆う導電性筒部材とシールドケースとの隙間より電磁波ノイズが輻射されることを防止できる医療用コネクタ装置を提供することにある。
【００１３】
【課題を解決するための手段】
本発明は、コネクタとコネクタ受けとを有する医療用コネクタ装置において、医療用電気器具に接続されるためのケーブルに設けられて前記コネクタを構成し、導電性の材料で形成されて内側に第１の接点ピンを保持する筒部材と、前記コネクタ受けに設けられ電子回路と電気的に接続され、前記電子回路からの信号を伝送するための第２の接点ピンを保持する保持筒と、前記電子回路とは電気的に絶縁され、内周部と前記保持筒の外周部との間で空間を形成するように前記コネクタ受けに設けられた導電性筒と、前記第１の接点ピンと前記第２の接点ピンとを電気的に接続するために、前記コネクタが前記コネクタ受けに装着されて前記筒部材が前記空間内に挿入されたときに、前記筒の内周面と接触可能な前記保持筒の外周の所定の位置に設けられる第１の導通用バネと、前記コネクタが前記コネクタ受けに装着されて前記筒部材が前記空間内に挿入されたときに、前記筒の外周面と接触可能な前記導電性筒の所定の位置に設けられる第２の導通用バネと、を具備したことを特徴とする。
【００１５】
また、回路基板とコネクタ受けとを接続するケーブルを覆う導電性筒部材とをこの導電性筒部材の端部を突出する形でシールドケースを構成する導電性板で一体的に覆い、ケーブルを覆う導電性筒部材とシールドケースとの空間を導電性部材で覆うことにより、導電性筒部材とシールドケースとの隙間を無くして隙間から電磁波ノイズが輻射されるのを解消している。
【００１６】
【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具体的に説明する。
（第１実施例）
図１ないし図３は本発明の第１の実施の形態に係り、図１は内視鏡システムの略概図を示し、図２は本発明の第１の実施の形態の内視鏡用コネクタ装置を構成する信号伝送ケーブルの端部に設けられたコネクタと、このコネクタが接続される信号処理装置のコネクタ受けの構造を縦断面図で示し、図３はコネクタ受けにコネクタを装着した状態の一部の拡大図を示す。
【００１７】
図１に示すように医療用装置としての内視鏡システム１は撮像手段を備えた電子内視鏡２と、この電子内視鏡２に照明光を供給する光源装置３と、撮像手段に対する信号処理を行い、映像信号を生成する信号処理装置（或いは映像信号処理装置）４と、この信号処理装置４と接続され、映像を表示するモニタ５と、電子内視鏡２及び光源装置３からの信号を信号処理装置４に伝送する信号伝送ケーブル６とより構成されている。
【００１８】
また信号伝送ケーブル６は電子内視鏡２と接続するための内視鏡接続用コネクタ７と信号処理装置４と接続するための信号処理装置接続用コネクタ８とが両端に設けられた構造となっている。
【００１９】
電子内視鏡２は生体内に挿入するための細長の挿入部９と、この挿入部９の後端に設けられた操作部１と、この操作部１０の側部から延出されたユニバーサルコード１１とを有し、このユニバーサルコード１１の末端に総合コネクタ１２が設けられており、この総合コネクタ１２の前端に設けたライトガイドコネクタ１３は光源装置３のライトガイドコネクタ受け部に着脱自在で接続される。また、この総合コネクタ１２の側部のコネクタ受け１４に上記内視鏡接続用コネクタ７が着脱自在で接続される。
【００２０】
上記ライトガイドコネクタ１３を光源装置３に接続することにより、光源装置３内の図示しないランプの照明光がライトガイドコネクタ１３の端面に供給され、ユニバーサルコード１１、操作部１０、挿入部９内に挿通されたライトガイドにより照明光は伝送され、挿入部９の先端部の照明窓に取り付けられた先端面から伝送された照明光が出射され、体腔内の患部等の対象物側を照明する。
【００２１】
この照明窓に隣接して観察窓が設けられており、この観察窓に取り付けた対物レンズにより対象物の光学像をその焦点面に結ぶ。この焦点面にはＣＣＤ等の固体撮像素子が配置されており、光学像を光電変換する。この固体撮像素子は挿入部９内等を挿通された信号伝送ケーブルを介して総合コネクタ１２のコネクタ受け１４に接続されている。
【００２２】
従って、このコネクタ受け１４に内視鏡接続用コネクタ７を接続し、さらに信号処理装置接続用コネクタ８を信号処理装置４のコネクタ受け１５と接続することにより、信号処理装置４内の図示しない固体撮像素子ドライブ回路からドライブ信号が固体撮像素子に印加され、光電変換された信号が読み出されて信号処理装置４内の映像信号処理回路に入力され、標準的な映像信号が生成され、この映像信号はカラーモニタ５に入力され、カラーモニタ５の表示面に対象物の像を表示する。
【００２３】
信号処理装置４は図示しない商用電源に接続される１次回路と、この１次回路と絶縁トランス等により電気的に絶縁された２次回路と、さらにこの２次回路とアイソレーション手段により絶縁された患者回路とを有し、電子内視鏡２の撮像手段はこの患者回路と接続される。従って、本実施の形態における電気系は電子内視鏡２が医療用内視鏡として使用した場合にも安全性を確保する構成にしている。
【００２４】
信号処理装置４は１次回路或いは２次回路のグランド（以下、ＧＮＤと略記する）と導通する筐体シャーシ２１にはコネクタ受け１５を構成する絶縁部材で形成されたコネクタ台２２を介して金属製で筒形状の接点ピン保持筒２３が取り付けられている。この接点ピン保持筒２３はコネクタ８が装着される側の開口端部に絶縁部材を介して取り付けたコネクタ受け１５の複数の接点ピン２９，２９，…を保持する。また、接点ピン２９，２９，…と回路基板２５とを接続する接続ケーブル（或いは通信ケーブル）としての機能を有する複数の信号線３３，３３，…を覆うようにしてシールドする導電性筒部材の機能も有する。
【００２５】
また、この筐体シャーシ２１には絶縁部材を介して患者回路を構成する回路基板２５が取りつけられている。この回路基板２５は筐体シャーシ２１と絶縁された金属製の患者回路シールドケースとして上シールドケース２６ａ及び下シールドケース２６ａで上下から覆われており、この上シールドケース２６ａ及び下シールドケース２６ａの開口には接点ピン保持筒２３の一方の端部が挿入され、回路基板２５に立設した導電性板部材（具体的には金属製の板部材）２７の開口の周囲でネジで固定されている。上シールドケース２６ａ、下シールドケース２６ａ及び板部材２７は回路基板２５のＧＮＤと接続されている。
【００２６】
シールドケース２６ａ，２６ｂの開口の周囲には、導通用弾性部材、具体的にはリン青銅などで形成された金属製で導通用バネ２８が設けられ、接点ピン保持筒２３の外周面に押圧するように接触し、シールドケース２６ａ，２６ｂと接点ピン保持筒２３とを導通する。つまり、接点ピン保持筒２３をシールドケース２６の電位（即ち、患者回路の０電位或いはＧＮＤ電位）に保持する（より好ましい具体例のシールドケース２６ａ，２６ｂ及び導通用バネ２８の構造については図７及び図８参照）。
【００２７】
接点ピン保持筒２３の他端側の開口端の内側には複数の接点ピン２９，２９，…をそれぞれのピン孔に貫通させるようにして取り付けた絶縁部材からなる２枚の円板形状の接点ピン保持部材３１及び接点ピン保持部材３１′がネジで固定されている。
【００２８】
各接点ピン２９には金属製で細い円柱形状の先端側に同心状に凹部を設けてコネクタ８側の接点ピン３２を挿入可能な凹部が形成され、後端側にはそれぞれ信号線３３の一端と接続する接続用リードが形成され、各接続用リードに接続された各信号線３３は接点ピン保持筒２３内を通して回路基板２５に設けたエッジコネクタ３４を経て回路基板２５の電子回路と接続される。
【００２９】
接点ピン保持筒２３の外側には接点ピン保持筒２３と同心状に（コネクタ受け１５に装着されるコネクタ８を固定するための）金属製のコネクタ固定筒３５が設けてあり、このコネクタ固定筒３５の基端（後端）は絶縁性のコネクタ台２２に固着されている。従って、このコネクタ固定筒３５は通常は大地、１次回路及び２次回路はもとより、患者回路とも絶縁されている。
【００３０】
コネクタ受け１５の外周側に配置される導電性筒体としてのコネクタ固定筒３５は金属製の部材でほぼ円筒形状に成形され、その円筒形状の先端は接点ピン２９の前端面より前方に突出して、通常は接点ピン２９部分が誤って導通してしまうことを防止している（コネクタ固定筒３５は金属製の部材であるが、通常は大地、１次回路、２次回路及び患者回路とも絶縁されているので、接触により電流が流れてしまうことはない）。
【００３１】
このコネクタ固定筒３５と接点ピン保持筒２３との間にはリング状の凹部３６が形成され、コネクタ８を装着する際のガイドとなるガイド筒３７及びこのガイド筒３７の内側に固定された金属製の第２の接点ピン保持筒４７を挿入できるようにしている。
【００３２】
また、このコネクタ固定筒３５の外周面の複数箇所にはカムピン４１が突設され、コネクタ８側に設けたコネクタ固定筒３５を受け入れる凹部４２の深部側に形成したカム溝４３にカムピン４１を係入させることにより、コネクタ受け１５に対してコネクタ８をロック（固定）して確実に装着状態を保持できるようにしている（図３参照）。
【００３３】
本実施の形態ではコネクタ受け１５にコネクタ８を装着した場合には以下のようにコネクタ固定筒３５を接点ピン保持筒２３と導通させることによりコネクタ８の装着状態ではコネクタ固定筒３５を患者回路のＧＮＤ（つまり、患者回路の０Ｖの電位）に設定する導通手段或いは導通機構を形成している。
【００３４】
図２に示すように接点ピン保持筒２３の外周面とコネクタ固定筒３５の内周面における例えばほぼ対向する位置にそれぞれ周溝等の凹部を設け、それぞれ導通用弾性部材、具体的にはリン青銅など金属製で弾性を有する導通用バネ３８、３９の基端を固定し、他端側を屈曲させて凹部３６側に突出するように設けている。
導通用バネ３８、３９は接点ピン保持筒２３の外周面とコネクタ固定筒３５の内周面の全周に設けられている。
【００３５】
ここで導通用バネ３８は接点ピン保持筒２３の外径より十分に突出しているが、コネクタ固定筒３５とは接触していない。一方、コネクタ固定３５の内周面に設けた導通用バネ３９はコネクタ固定筒３５の内径より十分に突出しているが接点ピン保持筒２３とは接触していない。
【００３６】
従って、凹部３６にコネクタ８のガイド筒３７を挿入し、コネクタ８をコネクタ受け１５に装着すると、図３に示すようにそれぞれの導通用バネ３８、３９は（ガイド筒３７の内側の）第２の接点ピン保持筒４７の内表面及びガイド筒３７の外表面に押圧するように接触し、接点ピン保持筒２３と第２の接点ピン保持筒４７、ガイド筒３７とコネクタ固定筒３５とはそれぞれ導通し、電気的に同じ電位となる。つまりコネクタ固定筒３５は第２の接点ピン保持筒４７及びガイド筒３７を介して接点ピン保持筒２３と導通し、患者回路のＧＮＤと導通する。
【００３７】
一方、コネクタ８は信号伝送ケーブル６をケーブル固定部４４で固定し、信号伝送ケーブル６の複数の信号線４５を金属製の第１の接点ピン保持筒４６内を通してこの接点ピン保持筒４６の開口端部の金属製の第２の接点ピン保持筒４７とに固定された絶縁性の接点ピン保持部材４８、４９等に取り付けられた複数の接点ピン３２，２３，…にそれぞれ接続している。
【００３８】
第２の接点ピン保持筒４７の外周面に嵌合するようにガイド筒３７が設けられ、ネジで第２の接点ピン保持筒４７に固定されている。第２の接点ピン保持筒４７とガイド筒３７とは導通している。第２の接点ピン保持筒４７の先端側は途中で導通用バネ３８に対応する部分を残してスリット状に切り欠かれている。
【００３９】
本実施の形態では上記のようにコネクタ受け１５における接点ピン保持筒２３の外周面とコネクタ固定筒３５の内周面にそれぞれ金属製の導通用バネ３８、３９を設け、コネクタ８が装着された場合には導通用バネ３８、３９はそれぞれ第２の接点ピン保持筒４７とガイド筒３７に導通し、これら金属製の両部材、つまり第２の接点ピン保持筒４７とガイド筒３７を介して接点ピン保持筒２３外側に設けたコネクタ固定筒３５は接点ピン保持筒２３と導通する構造にしていることが特徴となっている。
【００４０】
従って、信号伝送ケーブル６のコネクタ８を信号処理装置４のコネクタ受け１５に装着すると、図３に示す状態となり、この状態ではガイド筒３７が接点ピン保持筒２３の外周とコネクタ固定筒３５の内周の凹部３６の空間に挿入され、導電性の、より具体的には金属製の導通用バネ３８を介して接点ピン保持筒２３とガイド筒３７が電気的に導通し、導電性の、より具体的には金属製の導通用バネ３９を介してガイド筒３７とコネクタ固定筒３５とが電気的に導通し、その結果コネクタ固定筒３５と接点ビン保持筒２３とが電気的に同電位となり、コネクタ固定筒３５の電位が電気的に安定状態となり、電磁波ノイズが輻射されなくなるようにできるという効果を有する。
【００４１】
（第２の実施の形態）
図４及び図５は本発明の第２実施の形態に係り、図４は第２実施の形態のコネクタ装置の構造を示し、図５はコネクタ着脱検知部の検知動作を示す概略図を示す。
【００４２】
第１の実施の形態ではガイド筒３７が接点ピン保持筒２３の外周とコネクタ固定筒３５の内周とので形成される凹部３６の空間に挿入され、導電性の導通用バネ３８、３９の働きによってコネクタ固定筒３５と接点ピン保持筒２３が電気的に同電位となる構造にしたのに対して、本実施の形態では一方の導通用バネ３９を用いないで、以下の構成にしている。
【００４３】
図４に示すようにコネクタ固定筒３５′と接点ピン保持筒２３を電磁スイッチ５１および電磁スイッチ５１′を介して並列回路で電気的に接続し、信号伝送ケーブル６のコネクタ８が装着されている時に電磁スイッチ５１および電磁スイッチ５１′を閉じ、コネクタ固定筒３５′と接点ピン保持筒２３を電気的に同電位となるようにした点が異なる。ここで電磁スイッチ５１、５１′は２個としているが１個または２個以上でも良い。
【００４４】
コネクタ固定筒３５′は電磁スイッチ５１および電磁スイッチ５１′の一端とそれぞれ接続され、電磁スイッチ５１及び電磁スイッチ５１′の他端は接点ピン保持筒２３′と接続されている。
【００４５】
コネクタ固定筒３５′の近傍にはコネクタ８の着脱を、このコネクタ８側に設けた着脱検知ピン５４の検知により検知するコネクタ着脱検知部５２を設け、コネクタ着脱検知部５２の出力端はＣＰＵ５３に接続されており、ＣＰＵ５３は前述した電磁スイッチ５１および電磁スイッチ５１′のＯＮ／ＯＦＦ制御端に接続されている。前述したようにに電磁スイッチは２個以外にも１個または２個以上でも良い。
【００４６】
図５に示すようにコネクタ着脱検知部５２は発光素子５５及び受光素子５６で構成され、コネクタ８をコネクタ受け１５に装着した状態では遮光材よりなる着脱検知ピン５４が前記発光素子５５と前記受光素子５６の間に位置されるよう構成されている。
【００４７】
本実施の形態の作用及び効果は以下のようになる。
コネクタ受け１５にコネクタ８が装着されると着脱検知ピン５４が発光素子５５から受光素子５６への光を遮光し、コネクタ８が装着されたのを検知し、コネクタ着脱検知部５２は出力端から装着検知信号をＣＰＵ５３に送り、ＣＰＵ５３は電磁スイッチ５１および電磁スイッチ５１′を閉じＯＮ状態にする。逆にコネクタ８を装着を解除する操作を行うと発光素子５５から受光素子５６へ光が送られ、コネクタ８がコネクタ受け１５から外されたのを検知し、挿脱検知信号をＣＰＵ５３に送り、ＣＰＵ５３は電磁スイッチ５１および電磁スイッチ５１′を開き、ＯＦＦ状態にする。
【００４８】
以上の動作によりコネクタ８が装着されていない状態ではコネクタ固定筒３５′と接点ピン保持筒２３は絶縁されており、コネクタ８が装着された状態ではコネクタ固定筒３５′と接点ピン保持筒２３が電気的に同電位（具体的には、患者回路のＧＮＤ）となり、コネクタ固定筒３５′か電気的安定状態となり、電磁波ノイズが輻射されなくなる。
【００４９】
（第３の実施の形態）
図６ないし図８は本発明の第３実施の形態に係り、図６は信号処理装置のコネクタ受けと回路基板のシールドケースの一部の構造を示し、図７はシールドケースをコネクタ受け側から見た正面図を示し、図８はシールドケースの構造を斜視図で示している。
【００５０】
本実施の形態におけるコネクタ受け１５は第１の実施の形態で説明したコネクタ受け１５と同一であり、各通信用接点ピン受け２９は信号線３３により回路基板２５に接続されている。接点ピン受け２９及び信号線３３は第１の実施の形態で説明した様に導電性の（より具体的には金属製の部材より成る）接点ピン保持筒２３に覆われており、この接点ピン保持筒２３は回路基板２５の上まで延びている。
【００５１】
回路基板２５を上下よりサンドイッチする形で覆い且つ、接点ピン保持筒２３の端を内部に入れる形で覆い且つ、導電性の（具体的にはアルミニュウム、銅板等の金属）板を箱形状にし、接点ピン保持筒２３の入り口となる部分が下端側に略Ｕ字状に開口している上シールドケース２６ａと上端側に略Ｕ字状に開口している下シールドケース２６ｂが回路基板２５に固定され、この回路基板２５は図示しない絶縁部材を介して筐体シャーシ２１に固定されている。
【００５２】
上シールドケース２６ａと下シールドケース２６ｂの前記Ｕ字状開口部には、その開口部を取り囲む様に導電性があり横断面形状が折れ曲がり部より先端が開いている略Ｌ字形状のリン青銅等のバネ材よりなる複数のシールドバネ２８，２８，…が上シールドケース２６ａ及び下シールドケース２６ｂと導電性を保ち、上シールドケース２６ａ及び下シールドケース２６ｂにビス止め又は溶接されている。
【００５３】
ここで上シールドケース２６ａ及び下シールドケース２６ｂに固定されている複数のシールドバネ２８，２８，…の先端部の軌跡によって形成される略円形状の径は接点ピン保持筒２３の外径より小さく、従って各シールドバネ２８は接点ピン保持筒２３の外周面を押圧するようにして接触し、確実に導通状態を保持するようにしている。
【００５４】
その他は第１の実施の形態と同様の構成である。本実施の形態の作用及び効果は以下のようになる。
シールドバネ２３の先端部の軌跡によって形成される略円形状の径が接点ピン保持筒２３の外径より小さい事ので、シールドバネ２３と接点ピン保持筒２３が圧接して電気的に確実に導通し且つ、下シールドケース２２及び上シールドケース２１で回路基板１６を覆う事によって回路基板１６より発生する電磁波ノイズが下シールドケース２２及び上シールドケース２１の開口部と接点ピン保持筒２３の隙間から輻射される事なく、筐体の他の回路基板及び筐体外の他の装置に悪影響を与える事が無い。
【００５５】
従って、回路基板２５とコネクタ受け１５（の接点ピン２９）とを接続するケーブル（具体的には信号線３３）を覆っている導電性金属筒部材としての接点ピン保持筒２３と回路基板２５とを一体で覆っているシールドケースより電磁波ノイズが輻射されないシールド構造を提供できる。その他は第１の実施の形態と同様の効果を有する。
【００５６】
（第４実施の形態）
図９は第４の実施の形態におけるコネクタ受けの一部を示している。第３の実施の形態が上シールドケース２６ａ及び下シールドケース２６ｂの開口部と接点ピン保持筒２３の隙間をシールドバネ２８で塞いでいるのに対して、本実施の形態では接点ピン保持筒２３″外周部にネジ部２３ａを設け、このネジ部２３ａを利用し上シールドケース２６ａと下シールドケース２６ｂを接点ピン保持筒２３″に一体的に挟み込む形で隙間を塞ぐ点が異なる。
【００５７】
接点ピン保持筒２３″のシールドケース２６ａ，２６ｂ内の端面部に導電性金属よりなる板部材２７がビス止めされており、該板部材２７から上シールドケース２６ａ及び下シールドケース２６ｂまでの距離より若干長い導電性の例えば金属部材よりなる固定筒６１が板部材２７と上シールドケース２６ａ及び下シールドケース２６ｂに挟まれる形で接点ピン保持筒２３″外周に位置されており、接点ピン保持筒２３″の上シールドケース２６ａの開口部と下シールドケース２６ｂ開口部の外側にネジ部２３ａが設けられており、ネジ部２３ａには上シールドケース２６ａと下シールドケース２６ｂに外接する形で導電性の例えば金属部材よりなり内周面にネジ部２３ａに噛み合うネジ径及びピッチのネジが設けられて外径が上シールドケース２６ａの開口部と下シールドケース２６ｂの開口部より十分大きい挟み込みリング６２で締結されるようにしている。
【００５８】
本実施の形態の作用及び効果は以下のようになる。
接点ピン保持筒２３″に対して固定筒６１と挟み込みリング６２によって上シールドケース２６ａと下シールドケース２６ｂが一体的に挟み込まれ、上シールドケース２６ａの開口部と下シールドケース２６ｂの開口部が挟み込みリング６２によって塞がれ且つ、下シールドケース２６ｂ及び上シールドケース２６ａで回路基板２５を覆う事によって回路基板２５より発生する電磁波ノイズが下シールドケース２６ｂ及び上シールドケース２６ａの開口部と接点ピン保持筒２３″の隙間から輻射される事が無く、筐体内の他の回路基板及び筐体外の他の装置に悪影響を与える事を防止できる。
【００５９】
なお、上述した各実施の形態において、金属製の部材は少なくとも導電性を有する部材であれば良く、例えば接点ピン保持部材２３として絶縁性の部材の表面に導電性部材をコーティングしたり、金属箔を貼り付けたもの等でも良い。
【００６０】
また、コネクタ８は電子内視鏡２に着脱自在の信号伝送ケーブル６に設けたもので説明したが、電子内視鏡２と一体に信号伝送ケーブル６を設け、この信号伝送ケーブル６にコネクタ８を設けたものでも良い。
【００６１】
なお、上述した各実施の形態を部分的等で組み合わせて構成した実施の形態も本発明に属する。
なお、上述の各実施の形態では医療用電気装置或いは医療用電気機器の具体例として医療用内視鏡システムに使用されるコネクタ装置の場合で説明したが、本発明は医療用電気機器の医療用コネクタ装置としても適用できる。
【００６２】
例えば、電子内視鏡２に一体に設けた信号伝送ケーブル６のコネクタ８の代わりに生体に使用される医療用電気器具（例えば電気メス）の端部に設けたコネクタと、信号処理装置４のコネクタ１５の代わりに前記医療用電気器具を駆動し、１次回路、２次回路及び患者回路を有する駆動装置或いは制御装置（医療用電気器具が電気メスの場合には電気メスを駆動する高周波電源を含む電源装置）に設けられ、前記コネクタが着脱自在のコネクタ受けとで構成される医療用コネクタ装置に適用できる。この場合、コネクタ受けは駆動装置内の患者回路を構成する回路基板に接続ケーブル（具体例では複数の信号線３３）で接続される等、上述の実施の形態で説明したのと同様の構造を有する。従って、その説明を省略する。
【００６３】
［付記］
１．医療用電気器具に接続されるケーブルに設けられたコネクタと、前記医療用電気器具を駆動する駆動装置の患者回路と接続され、前記コネクタと着脱自在に接続されるコネクタ受けとを有する医療用コネクタ装置において、前記コネクタ受けの外周部に前記駆動装置の１次回路、２次回路及び患者回路から電気的に絶縁された導電性筒を設け、前記コネクタが装着された場合のみ前記導電性筒を患者回路の０Ｖ電位と導通する導通手段を設けた事を特徴とする医療用コネクタ装置。
【００６４】
２．前記導電性筒体の内周と、前記導電性筒体の内側に配置され、前記コネクタ受けの接点と患者回路を構成する回路基板に接続される接続ケーブルの外周部に配置され、患者回路の０Ｖ電位と導通した導電性筒部材の外周とに導電性弾性部材をそれぞれ取り付け、前記コネクタが装着された場合のみ前記導電性弾性部材及びコネクタを介して前記導電性筒体が前記導電性筒部材と電気的に接続され同電位となる事を特徴とする付記１記載の医療用コネクタ装置。
【００６５】
３．前記導電性筒体と前記導電性筒体の内側に配置され、前記コネクタ受けの接点と患者回路を構成する回路基板に接続される接続ケーブルの外周部に配置され、患者回路の０Ｖ電位と導通した導電性筒部材を１個以上の電磁スイッチを介し、２個以上の電磁スイッチを接続する時は導電性筒体と導電性筒部材との間に並列的に電磁スイッチを接続し、コネクタの着脱を検知しコネクタが装着された場合のみ前記１個以上の電磁スイッチを閉じ、前記導電性筒体が導電性筒部材と電気的に接続され同電位となる事を特徴とする付記１記載の医療用コネクタ装置。４．電子回路基板を内蔵し外部機器との通信用コネクタを備えた電子機器において、電子回路基板と電子回路基板に接続されている通信ケーブルを覆う導電性筒部材とを導電性筒部材の端部を突出する形で、シールドケースの導電性板部材で一体的に覆い、通信ケーブルを覆う導電性筒部材とシールドケースとの空間を導電性部材で覆ったことを特徴とするシールド構造。
【００６６】
５．シールドケースの通信ケーブルを覆う導電性筒部材の開口部周辺に複数の導電性弾性部材をシールドケースに電気的導通を保ちつつ一体的に設置し、導電性弾性部材の他端と前記通信ケーブルを覆う導電性筒部材を接触させ、通信ケーブルを覆う導電性筒部材とシールドケースとの空間を覆ったことを特徴とする付記４記載のシールド構造。
【００６７】
６．通信ケーブルを覆う導電性筒部材の外周にネジ部を設け、シールドケースの通信ケーブルを覆う導電性筒部材の開口部周辺を導電性筒部材に押しつける様に前記外周ネジ部に導電性リング部材を螺着させ、通信ケーブルを覆う導電性筒部材とシールドケースとの空間を覆ったことを特徴とする付記４記載のシールド構造。
【００６８】
７．撮像手段を有する医療用内視鏡に用いられ、前記撮像手段と接続されるケーブルに設けられたコネクタと、前記撮像手段に対する信号処理を行う信号処理装置の患者回路と接続され、前記コネクタと着脱自在に接続されるコネクタ受けとを有する内視鏡用コネクタ装置において、
前記コネクタ受けの外周部に前記信号処理装置の１次回路、２次回路及び患者回路から電気的に絶縁された導電性筒体を設け、前記コネクタが装着された場合のみ前記導電性筒体を患者回路のＧＮＤと導通する導通手段を設けた事を特徴とする内視鏡用コネクタ装置。
【００６９】
【発明の効果】
以上説明したように本発明によれば、導電性筒体から電磁波ノイズが輻射されるのを防止或いは解消できる。
【００７０】
また、回路基板とコネクタ受けとに接続されているケーブルを覆う導電性筒部材の端部を突出させてシールドケースで一体的に覆うことにより、ケーブルを覆う導電性筒部材とシールドケースとの隙間より電磁波ノイズが輻射されるのを解消できる。
【図面の簡単な説明】
【図１】内視鏡システムの略概構成図。
【図２】本発明の第１の実施の形態を構成する信号伝送ケーブルの端部に設けられたコネクタと、このコネクタが接続される信号処理装置のコネクタ受けの構造を示す縦断面図。
【図３】コネクタ受けにコネクタを装着した状態のコネクタ装置の拡大図。
【図４】本発明の第２の実施の形態のコネクタ装置の構造を示す断面図。
【図５】コネクタ着脱検知部の検知動作の概略説明図。
【図６】本発明の第３の実施の形態におけるコネクタ受けの構造を示す断面図。
【図７】シールドケースをコネクタ受け側から見た正面図。
【図８】シールドケースの構造を斜視図。
【図９】本発明の第４の実施の形態におけるコネクタ受けの一部の構造を示す図。
【符号の説明】
１…内視鏡システム
２…電子内視鏡
３…光源装置
４…信号処理装置
６…信号伝送ケーブル
８…（信号処理装置接続用）コネクタ
１１…ユニバーサルコード
１２…総合コネクタ
１５…コネクタ受け
２１…筐体シャーシ
２２…コネクタ台
２３…接点ピン保持筒
２５…回路基板
２６ａ，２６ｂ…シールドケース
２８…導通用バネ
２９…接点ピン
３１、３１′…接点ピン保持部材
３２…接点ピン
３３…信号線
３５…コネクタ固定筒
８…コネクタ
３７…ガイド筒
３８、３９…導通用バネ[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a medical connector device having a cable connector connected to a medical electrical device such as a medical endoscope, and a connector receiver detachably connected to the connector and having a connector receiver of a driving device.
[0002]
[Prior art]
As a prior art 1, a connector receiver for a signal transmission cable of a signal processing device is fixed to a housing chassis via an insulating material to form a patient circuit, and a connector of the signal transmission cable is securely and easily provided on an outer peripheral portion of the connector receiver. A signal transmission cable fixing tube (or connector fixing tube) provided with a cam pin for a cam groove lock structure to be fixed is arranged.
[0003]
This connector fixing tube is electrically insulated from the ground, primary circuit and secondary circuit in order to maintain the withstand voltage when the signal transmission cable connector is mounted, and also covers the signal transmission cable connector receiver by covering it. Since the signal transmission cable connector receiver connected to the patient circuit is not easily touched when the signal transmission cable connector is not attached to the processing device, it is also electrically insulated from the patient circuit. ing.
[0004]
As shown in Japanese Utility Model Application No. 60-113703, a concave opening for passing a communication cable is provided in order to shield electromagnetic noise radiated from an electronic circuit board to which the communication cable is connected. I was shielding with a shield case.
[0005]
Further, as another prior art, as shown in Japanese Patent Application No. 60-147185, an opening for passing a communication cable to shield electromagnetic wave noise radiated from an electronic circuit board to which the communication cable is connected, The shield is provided by a shield case provided with a conductive elastic member for closing the opening.
[0006]
Further, as another conventional technique, a communication cable connected to an electronic circuit board is covered with a conductive metal tube, and the conductive metal tube and the electronic circuit board covering the communication cable are connected to the end of the conductive metal tube. It was covered with a shield case made of a conductive metal plate in a protruding manner to shield electromagnetic noise radiated from the electronic circuit board.
[0007]
[Problems to be solved by the invention]
In the case of the prior art 1, the connector fixing tube located on the outer peripheral portion of the signal transmission cable connector receiver is electrically insulated from the ground, the primary circuit, the secondary circuit, and the patient circuit. When a connector is attached and a signal flows between the signal processing device and the signal transmission cable on the endoscope side, the connector fixed tube becomes electrically unstable, and electromagnetic noise transmitted to the connector fixed tube causes the connector fixed tube to lose its electromagnetic noise. There was a possibility of more radiation.
[0008]
The problem of Japanese Utility Model Application No. 60-113703 of prior art 2 is that electromagnetic noise from the electronic circuit board is easily radiated from the concave opening through which the communication cable of the shield case passes, and electromagnetic noise from the electronic circuit board is transmitted. It was conducted to the cable, and electromagnetic wave noise was easily radiated from the communication cable.
[0009]
The problem of Japanese Patent Application No. 60-147185 of prior art 2 is that the opening for passing the communication cable is closed by a conductive elastic member, but the electromagnetic wave noise from the electronic circuit board is transmitted to the communication cable to communicate. Electromagnetic noise is easily radiated from the cable as in the case of Japanese Utility Model Application No. 60-113703.
[0010]
The problem of the prior art 2 and other prior arts is that the electronic circuit board and the conductive metal tube are only covered by a shield case made of a conductive metal plate integrally with the end of the conductive metal tube protruding. Therefore, a space is formed in the opening of the conductive metal tube and the conductive metal tube of the shield case, and there is a possibility that electromagnetic wave noise from the electronic circuit board is radiated from the space.
[0011]
The present invention has been made in view of the above points, and a first object of the present invention is to prevent electromagnetic wave noise from being radiated from a connector fixing cylinder or a conductive cylinder disposed on an outer peripheral portion of a connector receiver. An object of the present invention is to provide a medical connector device.
[0012]
A second object of the present invention is to provide a medical connector device capable of preventing electromagnetic wave noise from being radiated from a gap between a conductive tubular member covering a communication cable and a shield case.
[0013]
[Means for Solving the Problems]
The present inventionIt has a connector and a connector receiverIn medical connector devices,A tubular member provided on a cable for connection to a medical electrical appliance to constitute the connector, formed of a conductive material and holding a first contact pin inside, and an electronic member provided on the connector receiver. A holding cylinder that is electrically connected to a circuit and holds a second contact pin for transmitting a signal from the electronic circuit, and the electronic circuit is electrically insulated, and an inner peripheral portion and the holding cylinder are In order to electrically connect a conductive cylinder provided in the connector receiver so as to form a space between the outer peripheral portion and the first contact pin and the second contact pin, the connector includes the connector. A first conductive spring provided at a predetermined position on the outer periphery of the holding cylinder which can be brought into contact with the inner peripheral surface of the cylinder when the cylinder member is inserted into the space while being mounted on a receiver; The connector is attached to the connector receptacle A second conductive spring provided at a predetermined position of the conductive cylinder that can contact an outer peripheral surface of the cylinder when the cylinder member is inserted into the space. I do.
[0015]
In addition, the conductive tubular member covering the cable connecting the circuit board and the connector receiver is integrally covered with a conductive plate constituting a shield case in a manner that the end of the conductive tubular member protrudes to cover the cable. By covering the space between the conductive tubular member and the shield case with the conductive member, the gap between the conductive tubular member and the shield case is eliminated, and the radiation of electromagnetic wave noise from the gap is eliminated.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
(First embodiment)
1 to 3 relate to a first embodiment of the present invention, FIG. 1 is a schematic diagram of an endoscope system, and FIG. 2 is an endoscope connector according to the first embodiment of the present invention. FIG. 3 is a longitudinal sectional view showing a connector provided at an end of a signal transmission cable constituting the device and a structure of a connector receiver of the signal processing device to which the connector is connected. FIG. 3 shows a state where the connector is mounted on the connector receiver. A partially enlarged view is shown.
[0017]
As shown in FIG. 1, an endoscope system 1 as a medical device includes an electronic endoscope 2 provided with an imaging unit, a light source device 3 for supplying illumination light to the electronic endoscope 2, and a signal for the imaging unit. A signal processing device (or a video signal processing device) 4 that performs processing and generates a video signal, a monitor 5 that is connected to the signal processing device 4 and displays an image, and the electronic endoscope 2 and the light source device 3 It comprises a signal transmission cable 6 for transmitting a signal to the signal processing device 4.
[0018]
The signal transmission cable 6 has a structure in which an endoscope connection connector 7 for connecting to the electronic endoscope 2 and a signal processing device connection connector 8 for connecting to the signal processing device 4 are provided at both ends. ing.
[0019]
The electronic endoscope 2 includes an elongated insertion portion 9 for insertion into a living body, an operation portion 1 provided at a rear end of the insertion portion 9, and a universal cord extending from a side portion of the operation portion 10. An integrated connector 12 is provided at the end of the universal cord 11. A light guide connector 13 provided at the front end of the integrated connector 12 is detachably connected to a light guide connector receiving portion of the light source device 3. Is done. The endoscope connection connector 7 is detachably connected to the connector receiver 14 on the side of the integrated connector 12.
[0020]
By connecting the light guide connector 13 to the light source device 3, the illumination light of a lamp (not shown) in the light source device 3 is supplied to the end face of the light guide connector 13, and the light enters the universal cord 11, the operation unit 10, and the insertion unit 9. Illumination light is transmitted by the inserted light guide, and the transmitted illumination light is emitted from the distal end surface attached to the illumination window at the distal end of the insertion section 9 to illuminate an object side such as an affected part in a body cavity.
[0021]
An observation window is provided adjacent to the illumination window, and an optical image of the object is focused on the focal plane by an objective lens attached to the observation window. A solid-state imaging device such as a CCD is arranged on the focal plane, and photoelectrically converts an optical image. This solid-state imaging device is connected to a connector receiver 14 of the general connector 12 via a signal transmission cable inserted through the inside of the insertion section 9 or the like.
[0022]
Therefore, by connecting the connector 7 for endoscope connection to the connector receiver 14 and further connecting the connector 8 for signal processing device connection to the connector receiver 15 of the signal processing device 4, a solid-state (not shown) A drive signal is applied from the imaging device drive circuit to the solid-state imaging device, a photoelectrically converted signal is read out, and input to a video signal processing circuit in the signal processing device 4 to generate a standard video signal. The signal is input to the color monitor 5 and an image of the object is displayed on the display surface of the color monitor 5.
[0023]
The signal processing device 4 includes a primary circuit connected to a commercial power supply (not shown), a secondary circuit electrically isolated from the primary circuit by an insulating transformer, and the like, and further isolated from the secondary circuit by an isolation means. And an imaging means of the electronic endoscope 2 is connected to the patient circuit. Therefore, the electric system in the present embodiment is configured to ensure safety even when the electronic endoscope 2 is used as a medical endoscope.
[0024]
The signal processing device 4 is connected to a ground of a primary circuit or a secondary circuit (hereinafter abbreviated to GND) by a metal via a connector base 22 formed of an insulating member constituting the connector receiver 15 on a housing chassis 21. And a cylindrical contact pin holding cylinder 23 made of a metal. The contact pin holding cylinder 23 holds a plurality of contact pins 29, 29,... Of the connector receiver 15 attached to the opening end on the side where the connector 8 is mounted via an insulating member. Further, a conductive cylindrical member that covers and shields a plurality of signal lines 33, 33,... Having a function as connection cables (or communication cables) for connecting the contact pins 29, 29,. It also has functions.
[0025]
Further, a circuit board 25 constituting a patient circuit is attached to the housing chassis 21 via an insulating member. The circuit board 25 is covered with an upper shield case 26a and a lower shield case 26a from above and below as a metallic patient circuit shield case insulated from the housing chassis 21. The upper shield case 26a and the lower shield case 26a have openings. One end of the contact pin holding cylinder 23 is inserted into the contact hole, and is fixed with a screw around an opening of a conductive plate member (specifically, a metal plate member) 27 erected on the circuit board 25. . The upper shield case 26a, the lower shield case 26a, and the plate member 27 are connected to GND of the circuit board 25.
[0026]
Around the openings of the shield cases 26 a and 26 b, a conductive elastic member, specifically, a conductive spring 28 made of metal such as phosphor bronze is provided and presses against the outer peripheral surface of the contact pin holding cylinder 23. As described above, the shield cases 26a and 26b and the contact pin holding cylinder 23 are electrically connected. That is, the contact pin holding cylinder 23 is held at the potential of the shield case 26 (that is, the zero potential or the GND potential of the patient circuit). And FIG. 8).
[0027]
Inside the open end on the other end side of the contact pin holding cylinder 23, two disc-shaped contacts made of an insulating member attached so that a plurality of contact pins 29, 29,. The pin holding member 31 and the contact pin holding member 31 'are fixed with screws.
[0028]
Each of the contact pins 29 has a concentric concave portion formed at the leading end of a thin metal column and is formed with a concave portion into which the contact pin 32 of the connector 8 can be inserted. Each signal line 33 connected to each connection lead is connected to an electronic circuit of the circuit board 25 via an edge connector 34 provided on the circuit board 25 through the contact pin holding cylinder 23. You.
[0029]
Outside the contact pin holding cylinder 23, a metal connector fixing cylinder 35 (for fixing the connector 8 mounted on the connector receiver 15) is provided concentrically with the contact pin holding cylinder 23. The base end (rear end) of 35 is fixed to the insulating connector base 22. Therefore, the connector fixing cylinder 35 is normally insulated from the ground, the primary circuit, the secondary circuit, and the patient circuit.
[0030]
The connector fixing cylinder 35 as a conductive cylinder disposed on the outer peripheral side of the connector receiver 15 is formed of a metal member into a substantially cylindrical shape, and the tip of the cylindrical shape projects forward from the front end face of the contact pin 29. Normally, the contact pin 29 is prevented from conducting accidentally (the connector fixing cylinder 35 is a metal member, but is usually insulated from the ground, the primary circuit, the secondary circuit, and the patient circuit). Current does not flow due to contact).
[0031]
A ring-shaped concave portion 36 is formed between the connector fixing tube 35 and the contact pin holding tube 23, and a guide tube 37 serving as a guide when the connector 8 is mounted, and a metal fixed inside the guide tube 37. The second contact pin holding cylinder 47 made of a metal can be inserted.
[0032]
Further, cam pins 41 are protruded from a plurality of locations on the outer peripheral surface of the connector fixing cylinder 35, and the cam pins 41 are engaged with cam grooves 43 formed on the deep side of the concave portion 42 for receiving the connector fixing cylinder 35 provided on the connector 8 side. By inserting the connector, the connector 8 is locked (fixed) to the connector receiver 15 so that the mounted state can be reliably maintained (see FIG. 3).
[0033]
In the present embodiment, when the connector 8 is mounted on the connector receiver 15, the connector fixing cylinder 35 is electrically connected to the contact pin holding cylinder 23 as described below, so that the connector fixing cylinder 35 is connected to the patient circuit when the connector 8 is mounted. A conduction means or a conduction mechanism for setting to GND (that is, a potential of 0 V of the patient circuit) is formed.
[0034]
As shown in FIG. 2, concave portions such as circumferential grooves are provided at positions substantially opposite to each other on the outer peripheral surface of the contact pin holding cylinder 23 and the inner peripheral surface of the connector fixing cylinder 35, respectively, and a conductive elastic member, specifically, phosphorus is provided. The base ends of the conductive springs 38 and 39 made of metal such as bronze and having elasticity are fixed, and the other ends are bent so as to protrude toward the recess 36 side.
The conducting springs 38 and 39 are provided on the entire outer peripheral surface of the contact pin holding cylinder 23 and the inner peripheral surface of the connector fixing cylinder 35.
[0035]
Here, the conduction spring 38 protrudes sufficiently from the outer diameter of the contact pin holding cylinder 23, but does not contact the connector fixing cylinder 35. On the other hand, the conduction spring 39 provided on the inner peripheral surface of the connector fixing 35 projects sufficiently from the inner diameter of the connector fixing cylinder 35 but does not contact the contact pin holding cylinder 23.
[0036]
Therefore, when the guide tube 37 of the connector 8 is inserted into the concave portion 36 and the connector 8 is mounted on the connector receiver 15, each of the conduction springs 38 and 39 becomes the second (inside of the guide tube 37) as shown in FIG. The contact pin holding cylinder 23 and the second contact pin holding cylinder 47, and the guide cylinder 37 and the connector fixing cylinder 35 are pressed against the inner surface of the contact pin holding cylinder 47 and the outer surface of the guide cylinder 37, respectively. It conducts and becomes electrically the same potential. That is, the connector fixing cylinder 35 is electrically connected to the contact pin holding cylinder 23 via the second contact pin holding cylinder 47 and the guide cylinder 37, and is electrically connected to the GND of the patient circuit.
[0037]
On the other hand, the connector 8 fixes the signal transmission cable 6 with the cable fixing portion 44, and passes a plurality of signal lines 45 of the signal transmission cable 6 through the first metal contact pin holding cylinder 46 to open the contact pin holding cylinder 46. Are respectively connected to a plurality of contact pins 32, 23,... Attached to insulating contact pin holding members 48, 49 and the like fixed to a metal second contact pin holding cylinder 47 at the end.
[0038]
The guide cylinder 37 is provided so as to fit on the outer peripheral surface of the second contact pin holding cylinder 47, and is fixed to the second contact pin holding cylinder 47 with screws. The second contact pin holding cylinder 47 and the guide cylinder 37 are electrically connected. The distal end side of the second contact pin holding cylinder 47 is cut out like a slit, leaving a portion corresponding to the conducting spring 38 in the middle.
[0039]
In the present embodiment, metal conductive springs 38 and 39 are provided on the outer peripheral surface of the contact pin holding cylinder 23 and the inner peripheral surface of the connector fixing cylinder 35 in the connector receiver 15 as described above, and the connector 8 is mounted. In this case, the conduction springs 38 and 39 are electrically connected to the second contact pin holding cylinder 47 and the guide cylinder 37, respectively, and are passed through both of these metallic members, that is, the second contact pin holding cylinder 47 and the guide cylinder 37. The connector fixing cylinder 35 provided outside the contact pin holding cylinder 23 is characterized in that it has a structure to conduct with the contact pin holding cylinder 23.
[0040]
Accordingly, when the connector 8 of the signal transmission cable 6 is mounted on the connector receiver 15 of the signal processing device 4, the state shown in FIG. 3 is obtained. In this state, the guide cylinder 37 is connected to the outer periphery of the contact pin holding cylinder 23 and the inside of the connector fixing cylinder 35. The contact pin holding cylinder 23 and the guide cylinder 37 are inserted into the space of the peripheral concave portion 36 and are electrically connected to each other via a conductive, more specifically, a metal conductive spring 38, so that the conductive Specifically, the guide cylinder 37 and the connector fixing cylinder 35 are electrically connected to each other via the metal conduction spring 39, and as a result, the connector fixing cylinder 35 and the contact bin holding cylinder 23 have the same electric potential. This has the effect that the potential of the connector fixing cylinder 35 becomes electrically stable and electromagnetic noise can be prevented from being radiated.
[0041]
(Second embodiment)
4 and 5 relate to a second embodiment of the present invention. FIG. 4 shows the structure of the connector device of the second embodiment, and FIG. 5 is a schematic diagram showing a detecting operation of a connector attaching / detaching detecting section.
[0042]
In the first embodiment, the guide cylinder 37 is inserted into the space of the concave portion 36 formed by the outer periphery of the contact pin holding cylinder 23 and the inner periphery of the connector fixing cylinder 35, and the functions of the conductive conduction springs 38 and 39 are provided. Although the connector fixing cylinder 35 and the contact pin holding cylinder 23 are electrically connected to the same potential, the present embodiment employs the following configuration without using one of the conduction springs 39.
[0043]
As shown in FIG. 4, the connector fixing cylinder 35 'and the contact pin holding cylinder 23 are electrically connected in a parallel circuit via the electromagnetic switch 51 and the electromagnetic switch 51', and the connector 8 of the signal transmission cable 6 is mounted. The difference is that the electromagnetic switch 51 and the electromagnetic switch 51 'are sometimes closed so that the connector fixing cylinder 35' and the contact pin holding cylinder 23 have the same electric potential. Here, the number of the electromagnetic switches 51 and 51 'is two, but may be one or two or more.
[0044]
The connector fixing cylinder 35 'is connected to the electromagnetic switch 51 and one end of the electromagnetic switch 51', respectively, and the other ends of the electromagnetic switch 51 and the electromagnetic switch 51 'are connected to the contact pin holding cylinder 23'.
[0045]
In the vicinity of the connector fixing tube 35 ', there is provided a connector attachment / detachment detection section 52 for detecting the attachment / detachment of the connector 8 by detecting the attachment / detachment detection pin 54 provided on the connector 8 side. The CPU 53 is connected to the ON / OFF control terminals of the electromagnetic switch 51 and the electromagnetic switch 51 '. As described above, one or two or more electromagnetic switches may be used instead of two.
[0046]
As shown in FIG. 5, the connector attachment / detachment detecting section 52 is composed of a light emitting element 55 and a light receiving element 56. When the connector 8 is mounted on the connector receiver 15, the attachment / detachment detection pin 54 made of a light-shielding material is connected to the light emitting element 55 and the light It is configured to be located between the elements 56.
[0047]
The operation and effect of the present embodiment are as follows.
When the connector 8 is attached to the connector receiver 15, the attachment / detachment detection pin 54 blocks the light from the light emitting element 55 to the light receiving element 56, detects that the connector 8 is attached, and the connector attachment / detachment detection unit 52 outputs the signal from the output end. A mounting detection signal is sent to the CPU 53, and the CPU 53 closes the electromagnetic switch 51 and the electromagnetic switch 51 'to turn them on. Conversely, when the operation of releasing the attachment of the connector 8 is performed, light is sent from the light emitting element 55 to the light receiving element 56, and it is detected that the connector 8 has been removed from the connector receiver 15, and an insertion / removal detection signal is sent to the CPU 53. The CPU 53 opens the electromagnetic switch 51 and the electromagnetic switch 51 'to turn them off.
[0048]
By the above operation, when the connector 8 is not mounted, the connector fixing tube 35 'and the contact pin holding tube 23 are insulated. When the connector 8 is mounted, the connector fixing tube 35' and the contact pin holding tube 23 are separated. Electrically the same potential (specifically, GND of the patient circuit), the connector fixing tube 35 'is in an electrically stable state, and electromagnetic noise is not radiated.
[0049]
(Third embodiment)
6 to 8 relate to a third embodiment of the present invention. FIG. 6 shows a structure of a connector receiver of a signal processing device and a part of a shield case of a circuit board. FIG. FIG. 8 is a perspective view showing the structure of the shield case.
[0050]
The connector receiver 15 in the present embodiment is the same as the connector receiver 15 described in the first embodiment, and each communication contact pin receiver 29 is connected to the circuit board 25 by a signal line 33. As described in the first embodiment, the contact pin receiver 29 and the signal line 33 are covered with the conductive (more specifically, a metal member) contact pin holding cylinder 23. The holding cylinder 23 extends to above the circuit board 25.
[0051]
The circuit board 25 is covered in a sandwiched manner from above and below, and the end of the contact pin holding cylinder 23 is covered in a manner to be inserted therein. A conductive (specifically, metal such as aluminum or copper plate) plate is formed in a box shape, An upper shield case 26a having a substantially U-shaped opening at the lower end and a lower U-shaped lower case 26b having a substantially U-shaped opening at the upper end is fixed to the circuit board 25. The circuit board 25 is fixed to the housing chassis 21 via an insulating member (not shown).
[0052]
The U-shaped openings of the upper shield case 26a and the lower shield case 26b are substantially L-shaped phosphor bronze, etc., which are conductive so as to surround the openings and whose cross-sectional shape is open at the tip from the bent portion. Are maintained conductive with the upper shield case 26a and the lower shield case 26b, and are screwed or welded to the upper shield case 26a and the lower shield case 26b.
[0053]
Here, the substantially circular diameter formed by the trajectories of the tip portions of the plurality of shield springs 28 fixed to the upper shield case 26a and the lower shield case 26b is smaller than the outer diameter of the contact pin holding cylinder 23. Therefore, the shield springs 28 come into contact with each other by pressing the outer peripheral surface of the contact pin holding cylinder 23 so that the conductive state is reliably maintained.
[0054]
Other configurations are the same as those of the first embodiment. The operation and effect of the present embodiment are as follows.
Since the diameter of the substantially circular shape formed by the trajectory of the tip of the shield spring 23 is smaller than the outer diameter of the contact pin holding cylinder 23, the shield spring 23 and the contact pin holding cylinder 23 are in pressure contact with each other to ensure electrical conduction. In addition, by covering the circuit board 16 with the lower shield case 22 and the upper shield case 21, electromagnetic wave noise generated from the circuit board 16 is transmitted from the gap between the opening of the lower shield case 22 and the upper shield case 21 and the contact pin holding cylinder 23. There is no adverse effect on other circuit boards of the housing and other devices outside the housing without being radiated.
[0055]
Therefore, the contact pin holding cylinder 23 as a conductive metal cylinder member covering the cable (specifically, the signal line 33) connecting the circuit board 25 and the connector receiver 15 (the contact pin 29 thereof) and the circuit board 25 And a shield structure in which electromagnetic wave noise is not radiated from a shield case that integrally covers the shield case. The other effects are the same as those of the first embodiment.
[0056]
(Fourth embodiment)
FIG. 9 shows a part of the connector receiver according to the fourth embodiment. In the third embodiment, the gap between the opening of the upper shield case 26a and the lower shield case 26b and the contact pin holding cylinder 23 is closed by the shield spring 28, whereas in the present embodiment, the contact pin holding cylinder 23 is closed. The difference is that a screw portion 23a is provided on the outer peripheral portion, and the upper shield case 26a and the lower shield case 26b are integrally sandwiched between the contact pin holding cylinders 23 "by using the screw portion 23a.
[0057]
A plate member 27 made of a conductive metal is screwed to an end surface inside the shield case 26a, 26b of the contact pin holding cylinder 23 ", and a distance from the plate member 27 to the upper shield case 26a and the lower shield case 26b is determined. A slightly long conductive fixed cylinder 61 made of, for example, a metal member is positioned on the outer periphery of the contact pin holding cylinder 23 ″ in a manner sandwiched between the plate member 27 and the upper and lower shield cases 26 a and 26 b. A screw portion 23a is provided outside the opening of the upper shield case 26a and the opening of the lower shield case 26b, and the screw portion 23a is electrically conductive so as to circumscribe the upper shield case 26a and the lower shield case 26b. For example, a screw having a screw diameter and a pitch that meshes with the screw portion 23a is provided on the inner peripheral surface of the metal member and the outer diameter is an upper shield case. The opening of the opening and the lower shield case 26b of 26a are to be fastened in a sufficiently large pinch ring 62.
[0058]
The operation and effect of the present embodiment are as follows.
The upper shield case 26a and the lower shield case 26b are integrally sandwiched by the fixed cylinder 61 and the sandwiching ring 62 with respect to the contact pin holding barrel 23 ", and the opening of the upper shield case 26a and the opening of the lower shield case 26b are sandwiched. When the circuit board 25 is covered with the ring 62 and the lower shield case 26b and the upper shield case 26a cover the circuit board 25, the electromagnetic noise generated from the circuit board 25 is held in the openings of the lower shield case 26b and the upper shield case 26a and the contact pins are held. There is no radiation from the gap between the cylinders 23 ″, and it is possible to prevent other circuit boards inside the housing and other devices outside the housing from being adversely affected.
[0059]
In each of the above-described embodiments, the metal member may be a member having at least conductivity. For example, the surface of an insulating member may be coated with a conductive member as the contact pin holding member 23, or a metal foil may be used. May be attached.
[0060]
Although the connector 8 is described as being provided on the signal transmission cable 6 detachable from the electronic endoscope 2, the signal transmission cable 6 is provided integrally with the electronic endoscope 2, and the connector 8 is connected to the signal transmission cable 6. May be provided.
[0061]
Note that an embodiment configured by combining the above-described embodiments in a partial manner or the like also belongs to the present invention.
In each of the above embodiments, the connector device used in the medical endoscope system has been described as a specific example of the medical electric device or the medical electric device. It can also be applied as a connector device.
[0062]
For example, instead of the connector 8 of the signal transmission cable 6 provided integrally with the electronic endoscope 2, a connector provided at an end of a medical electric appliance (for example, an electric scalpel) used for a living body, A driving device or a control device that drives the medical appliance instead of the connector 15 and has a primary circuit, a secondary circuit, and a patient circuit (a high-frequency power supply that drives the electric scalpel when the medical appliance is an electric scalpel) , And the connector can be applied to a medical connector device including a detachable connector receiver. In this case, the connector receiver is connected to a circuit board constituting a patient circuit in the drive device by a connection cable (a plurality of signal lines 33 in a specific example), and has the same structure as that described in the above embodiment. Have. Therefore, the description is omitted.
[0063]
[Appendix]
1. A medical connector comprising: a connector provided on a cable connected to a medical electrical appliance; and a connector receiver connected to a patient circuit of a driving device for driving the medical electrical appliance and detachably connected to the connector. In the device, a conductive tube electrically insulated from a primary circuit, a secondary circuit, and a patient circuit of the driving device is provided on an outer peripheral portion of the connector receiver, and the conductive tube is mounted only when the connector is mounted. A medical connector device comprising a conducting means for conducting with a 0 V potential of a patient circuit.
[0064]
2. The inner periphery of the conductive cylinder and the inside of the conductive cylinder, the contact of the connector receiver and the outer periphery of a connection cable connected to a circuit board constituting a patient circuit, and a patient circuit. A conductive elastic member is attached to the outer periphery of the conductive cylindrical member that is electrically connected to the 0 V potential, and the conductive cylindrical member is connected to the conductive cylindrical member via the conductive elastic member and the connector only when the connector is mounted. 2. The medical connector device according to claim 1, wherein the medical connector device is electrically connected to and has the same potential.
[0065]
3. The conductive cylinder and the inside of the conductive cylinder are arranged on the outer periphery of a connection cable connected to a contact of the connector receiver and a circuit board constituting a patient circuit, and are electrically connected to the 0V potential of the patient circuit. When connecting two or more electromagnetic switches via one or more electromagnetic switches to the conductive cylinder member, the electromagnetic switches are connected in parallel between the conductive cylinder and the conductive cylinder member, and the connector The attachment according to claim 1, wherein the one or more electromagnetic switches are closed only when attachment / detachment is detected and the connector is attached, and the conductive cylinder is electrically connected to the conductive cylinder member to have the same potential. Medical connector device. 4. In an electronic device having a built-in electronic circuit board and a connector for communication with an external device, the electronic circuit board and a conductive tubular member covering a communication cable connected to the electronic circuit board may include an end portion of the conductive tubular member. A shield structure wherein a space between a conductive cylinder member for covering a communication cable and a shield case is covered with a conductive member in a projecting manner and integrally covered with a conductive plate member of a shield case.
[0066]
5. A plurality of conductive elastic members are integrally installed around the opening of the conductive cylindrical member covering the communication cable of the shield case while maintaining electrical conduction in the shield case, and the other end of the conductive elastic member and the communication cable are connected to each other. The shield structure according to claim 4, wherein a space between the conductive tube member covering the communication cable and the shield case is covered by contacting the conductive tube member to cover.
[0067]
6. A thread portion is provided on the outer periphery of the conductive tubular member covering the communication cable, and a conductive ring member is attached to the outer peripheral thread portion so as to press the periphery of the opening of the conductive tubular member covering the communication cable of the shield case against the conductive tubular member. The shield structure according to claim 4, wherein the shield structure is screwed to cover a space between the conductive tubular member covering the communication cable and the shield case.
[0068]
7. A connector used for a medical endoscope having an imaging unit, provided on a cable connected to the imaging unit, and a patient circuit of a signal processing device that performs signal processing on the imaging unit, and attached to and detached from the connector. An endoscope connector device having a connector receiver that is freely connected,
A conductive cylinder electrically insulated from a primary circuit, a secondary circuit and a patient circuit of the signal processing device is provided on an outer peripheral portion of the connector receiver, and the conductive cylinder is provided only when the connector is mounted. A connector device for an endoscope, comprising a conducting means for conducting with a GND of a patient circuit.
[0069]
【The invention's effect】
According to the present invention as described above,, GuideElectromagnetic noise can be prevented or eliminated from being radiated from the conductive cylinder.
[0070]
Also, by protruding the end of the conductive tubular member covering the cable connected to the circuit board and the connector receiver and integrally covering with the shield case, the gap between the conductive tubular member covering the cable and the shield case is provided. The radiation of electromagnetic wave noise can be further eliminated.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an endoscope system.
FIG. 2 is a longitudinal sectional view showing a connector provided at an end of a signal transmission cable and a connector receiver of a signal processing device to which the connector is connected, which constitutes the first embodiment of the present invention.
FIG. 3 is an enlarged view of the connector device in a state where the connector is mounted on the connector receiver.
FIG. 4 is a sectional view showing a structure of a connector device according to a second embodiment of the present invention.
FIG. 5 is a schematic explanatory diagram of a detection operation of a connector attachment / detachment detection unit.
FIG. 6 is a sectional view showing a structure of a connector receiver according to a third embodiment of the present invention.
FIG. 7 is a front view of the shield case as viewed from a connector receiving side.
FIG. 8 is a perspective view showing the structure of a shield case.
FIG. 9 is a view showing a partial structure of a connector receiver according to a fourth embodiment of the present invention.
[Explanation of symbols]
1. Endoscope system
2. Electronic endoscope
3. Light source device
4: Signal processing device
6 ... Signal transmission cable
8 ... (for signal processing device connection) connector
11… Universal code
12 ... Comprehensive connector
15… Connector receiver
21: Chassis chassis
22 ... Connector stand
23 ... Contact pin holding cylinder
25 ... Circuit board
26a, 26b ... Shield case
28 Conducting spring
29 ... Contact pin
31, 31 '... contact pin holding member
32 ... Contact pin
33 ... Signal line
35 ... Connector fixed tube
8 Connector
37… Guide tube
38, 39 ... spring for conduction

Claims

In a medical connector device having a connector and a connector receiver ,
A tubular member provided on a cable for connection to a medical electrical appliance, constituting the connector, formed of a conductive material, and holding a first contact pin inside;
A holding cylinder that is provided in the connector receiver, is electrically connected to an electronic circuit, and holds a second contact pin for transmitting a signal from the electronic circuit;
The electronic circuit is electrically insulated, a conductive tube provided in the connector receiver so as to form a space between an inner peripheral portion and an outer peripheral portion of the holding cylinder,
In order to electrically connect the first contact pin and the second contact pin, when the connector is mounted on the connector receiver and the cylinder member is inserted into the space, the inner circumference of the cylinder is A first conduction spring provided at a predetermined position on the outer periphery of the holding cylinder that can contact a surface,
A second conductive spring provided at a predetermined position of the conductive tube, which can be in contact with the outer peripheral surface of the tube when the connector is mounted on the connector receiver and the tube member is inserted into the space; When,
A medical connector device comprising: