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JP2004147701A - Handle structure for surgical instrument - Google Patents

Handle structure for surgical instrument
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Publication number
JP2004147701A
JP2004147701AJP2002313415AJP2002313415AJP2004147701AJP 2004147701 AJP2004147701 AJP 2004147701AJP 2002313415 AJP2002313415 AJP 2002313415AJP 2002313415 AJP2002313415 AJP 2002313415AJP 2004147701 AJP2004147701 AJP 2004147701A
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Prior art keywords
lock
state
unit
surgical instrument
trigger
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JP4086621B2 (en
Inventor
Masatoshi Sakurai
正利 桜井
Takuya Miyazaki
卓也 宮崎
Shinsaku Ueda
伸作 上田
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a handle structure for a surgical instrument for reducing the possibility of erroneous operations and making an operation procedure consistent in the handle structure of the surgical instrument for performing a first operation and a second operation. <P>SOLUTION: This handle structure is provided with a clamp trigger 32 operated so as to perform the first operation of shifting a tip operation part from a start state to a second operation startable state, a fire trigger 34 operated so as to perform the second operation, a first lock part for making the fire trigger 34 inoperable, a release button 82 operated so as to shift the first lock part from a lock operation state to a lock release state, and a second lock part for making the release button 82 inoperable. The second lock part is released only when the tip operation part is shifted to the second operation startable state by a first operation part. <P>COPYRIGHT: (C)2004,JPO

Description

Translated fromJapanese

【0001】
【発明の属する技術分野】
本発明は、外科手術に用いられる、人体の生体組織の縫合を行う自動縫合器等の外科用器具のハンドル構造に関する。
【0002】
【従来の技術】
近年の医療技術の発展に伴って、外科用器具自体もまた非常に複雑化してきている。これら外科用器具の複雑化が進行するのと同時に、操作方法も多種多様な複雑化したものがあり、例えば、その自動縫合器もその1つに該当する。このような自動縫合器では、最終目的である縫合を行うために、大別して、組織の適切な位置決め・把持(クランプとも言う)を行う第1の作動と、組織の切除及び縫合(ファイヤとも言う)を行う第2の作動の2つの作動が存在する。
【0003】
このような2つの作動に対応するために、第1トリガと、第2トリガとを備えるハンドルが知られている(例えば、特許文献1。)。この特許文献1のハンドル構造では、第1トリガが、ハンドグリップから間隔の空いた未作動の第1トリガ位置から、ハンドグリップに隣接する完全に作動した第1トリガ位置へと反時計回りに旋回可能になっており、第2トリガが、第1トリガ位置から間隔の空いた未作動の第2トリガ位置から、第1トリガに隣接する完全に作動した第2トリガ位置へと反時計回りに旋回可能となっており、第1トリガが、第2トリガとハンドグリップとの間に位置している。
【0004】
そして、ハンドルよりも先端部にあるエンドエフェクターと第1トリガとは、第1伝導アッセンブリーによってつながれ、エンドエフェクターと第2トリガとは、第2伝導アッセンブリーによってつながれている。第1トリガを引くことにより、第1伝動アッセンブリーが基端方向へと移動して、第1の作動である組織の適切な位置決めが行われる。また、第2トリガを引くことにより、第2伝導アッセンブリーが先端方向へと移動して、第2の作動である組織の切除及び縫合が行われる。
【0005】
ところで、この作動の手順は絶対的なものであり、第1の作動の完了する前、または、第1の作動より前に第2の作動が行われることがないように、そのような誤作動を防ぐための手段が必要となる。このため、特許文献1において、第1トリガが未作動第1トリガに位置するとき、第2トリガは第2伝導アッセンブリーによって反時計回りの旋回が阻止されている。その一方で、第1トリガが未作動第1トリガ位置からハンドグリップに向かって旋回するときに、第2伝導アッセンブリーは、第2トリガの旋回ができるように先端方向へと移動する。こうして、第1トリガを引くまでは、第2トリガを引くことができないが、第1トリガを引いて初めて、第2トリガを引くことができるようになっている。
【0006】
第1の作動である組織の位置決めを適切に行うことは非常に重要であり、間違った部位で、第2の作動である組織の切除及び縫合をすることがないように、また、不完全な縫合による組織のダメージが発生することがないように、慎重に正確な位置で組織の把持を行う必要がある。そのため、この第1の作動は、しばしば、やり直しを必要とし、そのために、第1トリガは、作動中に、未作動第1トリガ位置へと戻ることができるようになっていなければならない。
【0007】
その一方で、第1の作動が適正に完了した後、第2の作動が開始されたならば、組織の把持解除といった誤作動が行われないようにしなければならない。
【0008】
【特許文献1】
特開平10−197号公報(特許請求の範囲、図1、図5〜図10)
【0009】
【発明が解決しようとする課題】
上記従来の構成では、第1トリガが引かれた後でも解除ボタンを操作することができるので、組織の把持のやり直しをすることはできるが、同時に第2トリガが操作可能となっているために、組織の位置決め、即ち第1の作動が適切ではないにもかかわらず、操作可能となっている第2トリガを操作するという誤操作を招くおそれがある。
【0010】
さらには、第2トリガの操作中においても、解除ボタンを操作することができるので、第2の作動を実行中にもかかわらず、第1の作動が解除されるという誤作動・誤操作を招くおそれがある。
【0011】
このように、従来の構成では、誤操作を防ぐための手段が不十分であるという問題がある。
【0012】
本発明は、かかる課題に鑑みなされたもので、その目的は、誤操作の可能性が低減され、且つ、操作手順に一貫性がある外科用器具のハンドル構造を提供することである。また、本発明の他の目的は、一貫性を有しつつ、操作のやり直しが容易にできるという柔軟性を有する外科用器具のハンドル構造を提供することである。
【0013】
【課題を解決するための手段】
前述した目的を達成するために、本発明は、第1の作動と第2の作動とを行う先端作動部を有する外科用器具の操作を行うための外科用器具のハンドル構造であって、
先端作動部を開始状態から第2の作動開始可能状態へと遷移させる第1の作動を行うために操作される第1の操作部と、
第2の作動を行うために操作される第2の操作部と、
第2の操作部を操作不可にする第1のロック部と、
前記第1のロック部をロック作動状態からロック解除状態へと遷移させるために操作される第3の操作部と、
第3の操作部を操作不可にする第2のロック部と、
を備え、第2のロック部は、第1の操作部によって前記先端作動部が第2の作動開始可能状態となった時にのみロック解除状態となることを特徴とする。
【0014】
本発明では、第1の操作部の操作を行って、先端作動部を開始状態から第2の作動開始可能状態へと遷移された後に直ぐには、第2の操作部が操作可能な状態にはならない。そのために、第1の作動が終了したときに、その第1の作動が適切であるかどうかを十分に確認することができ、第1の作動が不適切であるにもかかわらず、第2の作動を開始するという誤操作を防止することができる。先端作動部が第2の作動開始可能状態へと遷移した後、第3の操作部を操作することにより、第2の操作部の操作を行うことができる。この第3の操作部による操作を必要とすることにより、第2の作動開始可能状態における確認作業を行うことができるのである。一方、この第3の操作部は、先端作動部が第2の作動開始可能状態となった時にのみ操作可能となるので、第3の操作部を第2の作動開始可能状態以外の状態で操作して第2の操作部を操作可能状態にするという、誤操作も防止することができる。こうして、操作手順に一貫性を持たせることができる。
【0015】
請求項2記載の発明は、請求項1記載のものにおいて、前記先端作動部を前記第2の作動開始可能状態に保持するために、第1の操作部を操作不可とする第3のロック部と、
該第3のロック部をロック作動状態からロック解除状態へと遷移させるために操作される第4の操作部と、
をさらに備える。
【0016】
第1の操作部により先端作動部が第2の作動開始可能状態になった時において、その状態を第3のロック部により確実に保持する一方で、第1の作動のやり直しが必要とされる場合には、第4の操作部を操作することにより、そのやり直しを容易に行うことができ、操作手順に柔軟性を持たせることができる。第4の操作部を操作しても、第3の操作部が操作されない限り、第2の作動を行うことはできないので、誤操作を防止することができる。
【0017】
請求項3記載の発明は、請求項2記載のものにおいて、前記第4の操作部を操作不可にする第4のロック部をさらに備え、
前記第3の操作部は、前記第1のロック部をロック解除状態にすると同時に、第4のロック部をロック作動状態にすることを特徴とする。
【0018】
第3の操作部が操作された状態においては、第2の作動開始可能状態における確認作業が行われて、第2の操作部が操作可能となっている。この状態では、第1の作動のやり直しを行うべきではない。本発明では、第2の操作部が操作可能となっている状態においては、第4の操作部の操作は不可となっているため、第2の作動中に第1の作動の解除を行うような誤操作は確実に防止される。
【0019】
請求項4記載の発明は、請求項3記載のものにおいて、第1のロック部をロック解除状態からロック作動状態へと遷移させるために操作される第5の操作部をさらに備え、
該第5の操作部は、前記第1のロック部をロック作動状態にすると同時に、第4のロック部をロック解除状態にすることを特徴とする。
【0020】
第2の作動が終了した場合、または、第2の作動を開始する直前にその作動を中止する必要が出た場合には、第5の操作部を操作することにより、第1のロック部がロック作動状態になり、第2の操作部の操作は不可となる。また、第4のロック部がロック解除状態となり、第4の操作部の操作が可能となる。第4の操作部を操作することにより、第1の操作部が操作可能状態となる。こうして、前の状態への復帰または操作のやり直しをすることができ、操作手順に柔軟性を持たせることができる。
【0021】
請求項5記載の発明は、前記第2のロック部が、第1の操作部に設けられた規制ピンであり、該規制ピンが第1の操作部の操作と共に、前記第3の操作部の移動を阻止する位置と、移動を許容する位置とに移動することを特徴とする。
【0022】
請求項6記載の発明は、第1の操作部の操作力を前記先端作動部に伝達する第1の伝達部を備え、
前記第3のロック部は、該第1の伝達部に設けられたストッパ段部と、該ストッパ段部に係止可能となり、該第1の伝達部の方へと付勢されるロックのストッパ端部とから構成され、第1の操作部が操作されて第1の伝達部が移動すると、ロックのストッパ端部がストッパ段部に係止されて第1の伝達部の移動をロックするものであり、
前記第4の操作部の操作力により、前記ロックのストッパ端部のストッパ段部からの係止が外れることを特徴とする。
【0023】
請求項7記載の発明は、第4の操作部が回動軸を有し、回動軸を中心として回転操作可能であり、第4のロック部は、前記回動軸が挿通する溝を有するプレートからなり、該プレートの溝は、第3の操作部に一体的に連結されて第4の操作部の回動軸の回動を許容する部位と、回動軸の回動を阻止する部位とを有することを特徴とする。
【0024】
請求項8記載の発明は、第2の操作部の操作力を前記先端作動部に伝達する第2の伝達部を備え、前記第5の操作部は第2の伝達部と一体的に連結されることを特徴とする。
【0025】
【発明の実施の形態】
以下、図面を用いて本発明の実施の形態を説明する。以下の実施形態は本発明を限定するものではない。尚、説明において、術者側を近位側、術者から遠ざかる側を遠位側ということにする。
【0026】
図1は、本発明の実施の形態に係るハンドル構造を含む外科用器具全体の斜視図である。この外科用器具は、自動縫合器であり、既存のものの主構成と同様に、主として、器具の遠位側に位置する先端作動部10と、器具の近位側に位置するハンドル部30と、先端作動部10とハンドル部30とを連結するシャフト部20と、から構成される。
【0027】
ハンドル部30には、後述のように、先端作動部10に組織を把持するためのクランプトリガ(第1のトリガ、第1の操作部)32と、該クランプトリガ32よりも遠位側にあって、先端作動部10に切断・縫合を行わせるためのファイヤトリガ(第2のトリガ、第2の操作部)34とが設けられる。
【0028】
先端作動部10には、体内組織を挟持する開閉自在のジョー部12が設けられる。このジョー部12は、ステープルカートリッジ14と、このステープルカートリッジ14に対して開閉可能に連結されるアンビル16とから構成される。
【0029】
また、ステープルカートリッジ14には、U字型のステープルが両端部をアンビル16に向かって放出可能な状態で多数格納される。多数のステープルがカートリッジ14の長手方向に整列したものからなる列が、複数列、長手方向に直交する方向に並設されている。ステープルをアンビル16に向けて押出すために、テーパー面を有するテーパー部材(図示せず)がステープルの下方に、且つカートリッジ14の長手方向に摺動可能に設けられている。このテーパー部材と共に移動可能なカッターが、ステープルの中央の2列の間を、移動可能に設けられている。シャフト部20の後述の駆動ロッド24によって、このテーパー部材が摺動することで、ステープルをアンビル16の方向へ押し出すと共にカッターが移動することができるようになっている。以上の切断・縫合の動作については、公知であるため、これ以上の説明を省略する。
【0030】
シャフト部20は、図3に示すように、外側のアウタシャフト21と、該アウタシャフト21内に同心的に配設されて、前記アンビル16に接続されたスリーブ(第1の伝達部)22と、スリーブ22内を同心的に貫通し、前記駆動手段に接続された駆動ロッド(第2の伝達部)24とから構成される。スリーブ22の近位側への移動により、アンビル16がステープルカートリッジ14に対して閉じ、遠位側への移動により、アンビル16がステープルカートリッジ14に対して開くようになっている。また、駆動ロッド24を遠位方向へと移動させることにより、駆動手段を遠位方向に駆動させて、切断・縫合ができるようになっている。シャフト部20の近位端には、回転ダイヤル26がアウタシャフト21、スリーブ22及び駆動ロッド24と共に回転可能となっており、この回転ダイヤル26を回転させることにより、先端作動部10をシャフト部20の軸線を中心として回転させて所望の回転位置に変えることができるようになっている。
【0031】
図1に示すハンドル部30は、ハンドル本体31と、ハンドル本体31に対して揺動可能となった前記クランプトリガ32、ファイヤトリガ34及び解除レバー36を有している。ハンドル本体31の下方からは、ハンドル本体31に固定のグリップ部38が延設されている。グリップ部38に対して近位側から順に、クランプトリガ32、ファイヤトリガ34及び解除レバー36が設けられる。
【0032】
クランプトリガ32は、ジョー部12のアンビル16を閉作動させるためのものであり、ファイヤトリガ34は、ステープルを打ち出し、またカッター動作を駆動するためのものであり、解除レバー36は、アンビル16を開作動させるためのものである。
【0033】
以下、ハンドル部30の詳細構造について説明する。図2に示すように、クランプトリガ32は、ピン40を介してハンドル本体31に軸着されて、ハンドル本体31に対して回動可能となっており、グリップ部38のすぐ遠位側に位置している。図4に示すように、クランプトリガ32の上端部にはギア部32aが設けられており、このギア部32aは、ハンドル本体31内で回動可能に軸着された歯車42に常時、噛合っている。また、クランプトリガ32には、そのギア部32aの近傍に、横方向に伸びる規制ピン32bが設けられる(図4(b)参照)。
【0034】
ファイヤトリガ34もピン40によりハンドル本体31に軸着されて、ハンドル本体31に対して回動可能に配設される。ファイヤトリガ34の上端部には、ファイヤトリガ34の本体に対して回転自在となりスプリング34bによって本体に対して所定の回転方向に付勢されたラッチ部34aが設けられる。ラッチ部34aは、ハンドル本体31内上方で遠近方向に移動可能に配設され前記駆動ロッド24に連結されるラックバー44のラック44aに噛合い可能となっている。ファイヤトリガ34は、ピン40においてクランプトリガ32と交差しており、ハンドル本体31外においては、ファイヤトリガ34は、クランプトリガ32よりも遠位側に、ハンドル本体31内においては、ファイヤトリガ34は、クランプトリガ32よりも近位側に配置される。ファイヤトリガ34の上部には、引張スプリング46の一端が取り付けられており、ファイヤトリガ34を常時図示の時計回りに回転する方向に押圧しており、図2の状態では、ハンドル本体31内にあるストッパーによってその時計回りの回転位置が規制されている。また、このストッパーによって規制されている状態においては、ラッチ部34aの回転も規制されている。ファイヤトリガ34の下部がグリップ部38方向に接近しても、スプリング46により、図2の位置に戻るよう付勢される。
【0035】
アンビル16の開操作を行うための解除レバー36は、図2及び図5に示すように、解除レバー36の本体から横方向に突出している円柱部36cが、ハンドル本体31に軸承され、ハンドル本体31に対して回動自在に設けられている。円柱部36cは、解除レバー36の本体から突出した長円形の台座36dからさらに横方向に突出している。解除レバー36には、図5及び図7に示すように、その上部の遠位側部において、凹空間36aと、該凹空間36a内を横断して伸びる規制棒36bとが形成される。
【0036】
ハンドル本体31内において、解除レバー36よりも遠位側には、ロックホルダ50が固着される。ロックホルダ50は、図5及び図6に示すように、その平面視でコ字状をなした枠体部を有しており、そのコ字状の両端壁に渡りピン51が架設されている。そして、そのピン51の回りには、ロックスプリング52が巻回される。さらに、ピン51には、ロックホルダ50と同様に、その平面視でコ字状をなした枠体部を有するアンビルロック54のコ字状の両端壁が、回動可能に取り付けられている。ロックスプリング52の一端は、ロックホルダ50の下方から斜めに伸びて、ハンドル本体31に形成された係止部31a(図2参照)に係止される。また、ロックスプリング52の他端は、アンビルロック54のコ字状の中央部の壁を貫通して、後方の解除レバー36の方へと伸びている。ロックスプリング52の一端がハンドル本体31の係止部31aに係止された状態で、ロックスプリング52の他端は、水平よりも上方へ付勢されており、よって、アンビルロック54は上方へと付勢されている。アンビルロック54のコ字状の中央部の壁は、やや上方へと突出しており、その上端部にあるストッパ端部54bは、後述のロッドホルダ58下面に当接している(図6、図7参照)。
【0037】
アンビルロック54の中央部の壁には、近位側へと延びるロック片部54aが形成されており、ロック片部54aは、前記解除レバー36の凹空間36a内の規制棒36bの下方へと進入している。
【0038】
ロッドホルダ58は、ハンドル本体31内において、遠近方向に移動可能に配設され、前記シャフト部20内のスリーブ22の近位端に接続される。スリーブ22及びロッドホルダ58は、ロッドホルダ58内に配設された圧縮スプリング60によって、常時、遠位方向へと付勢されており、ハンドル本体31内に形成されたストッパー部31bにロッドホルダ58の前面(遠位側面)が当接して、それ以上の遠位方向への移動が禁止される。
【0039】
また、ロッドホルダ58の下面は、図7に示したように、遠位側が引込面58a、中央部が突出面58b、近位側がギア面58cとなっている。つまり、引込面58aは、突出面58bよりも上方に引込んだ面となっている。そして、引込面58aと突出面58bとの境界は、ストッパ段部58dとなっている。前記ロックスプリング52によって上方に付勢されたアンビルロック54のストッパ端部54bは、突出面58b及び引込面58aのいずれかに当接している。ギア面58cは、前記歯車42に噛合っている。つまり、クランプトリガ32をグリップ38側に回動させることで、歯車42に動力が伝わりロッドホルダ58が近位方向に移動を行うと、ロッドホルダ58の遠位側の引込面58aに、前記アンビルロック54のストッパ端部54bがはまり込み、ストッパ段部58dに係止することで、圧縮スプリング60の付勢力に抗して、ロッドホルダ58の遠位方向への移動が規制されて、ロックされる。
【0040】
アンビルロック54のストッパ端部54bがロッドホルダ58の引込面58aにはまり込むと、アンビルロック54のロック片部54aは、解除レバー36の凹空間36aに設けられた、規制棒36bに突き当たる位置に移動する(図7(b))。この状態において、解除レバー36を回動させると、規制棒36bがアンビルロック54のロック片部54aを下方へと移動させるので、そのストッパ端部54bが、ロッドホルダ58のストッパ段部58dから外れて、ロッドホルダ58が解放される。こうして、ロッドホルダ58のロックを解除することができる。
【0041】
図9〜14に示すように、ハンドル部30にはファイヤトリガ34、解除レバー36の動作を規制する為の、溝を持った3つの第1カムプレート62、第2カムプレート64及び第3カムプレート66が配設されており、それぞれのカムプレート62、64、66はピン72、74によってそれぞれ連動するように規制される。以下、このカムプレートについて説明する。
【0042】
まず、第1カムプレート62は、ハンドル本体31に固定されたピン70によってハンドル本体31に対して回動可能に取り付けられる。図14に示すように、第1カムプレート62には、第1カム溝62a、第2カム溝62b、第3カム溝62c、第4溝62dが形成されている。短い円弧状の第2カム溝62bには、ハンドル本体31に固定されたピン72が挿通しており、よって、第1カムプレート62は、ピン70を中心として、ピン72が第2カム溝62bを移動することができる範囲内で、ハンドル本体31に対して揺動可能となっている。また、第1カムプレート62の上端部には、横方向へと折曲された折曲爪部62eが形成されており、通常状態において、折曲爪部62eは、後述のリターンノブ80の下部から横方向に張り出した脚部80aのすぐ前側(遠位側)に位置している。
【0043】
次に、第2カムプレート64は、第1カムプレート62とほぼ重ね合わされるようにしてハンドル本体31に配設されており、第2カムプレート64には、第1ガイド溝64a、第2ガイド溝64b、第3ガイド溝64c、カム溝64dが形成されている。第1ガイド溝64aを前記ピン72が貫通しており、これにより、第1ガイド溝64aがピン72によってガイドされて、第2カムプレート64はハンドル本体31に対して遠近方向に移動可能となっている。また、第2カムプレート64の上部には、横方向へと折曲された折曲爪部64eが形成されており、通常状態において、折曲爪部64eは、後述のリターンノブ80の下部から横方向に張り出した脚部80aのすぐ後側(近位側)に位置している。第2カムプレート64の近位端には、ハンドル本体31の近位端部に配設されたトーションスプリング84が当接しており、このトーションスプリング84によって第2カムプレート64は常時遠位側へと移動する方向に付勢されている。
【0044】
次に、第3カムプレート66には、その遠位側にガイド溝66aが形成されており、このガイド溝66aを、前記解除レバー36の円柱部36c及び長円形の台座36dが挿通している。ガイド溝66aには、その中央部に溝幅が狭くなった細溝部66bが設けられている。第3カムプレート66の近位側には、ピン74が一体的に取り付けられる。ピン74は、前記第2カムプレート64の第2ガイド溝64bと第1カムプレート62の第1カム溝62aとを貫通しており、このピン74がこれらの溝64b、62aを相対移動することができる範囲内で、第3カムプレート66はハンドル本体31に対して遠近方向に移動可能となっている。このピン74及び、前記第1カムプレート62の第4溝62dと第2カムプレート64の第3ガイド溝64cとを貫通するピン76は、リリースボタン82と一体的に連結される。よって、第3カムプレート66は、リリースボタン82と一体的に運動する。
【0045】
リリースボタン82は、ハンドル本体31のハウジングの両側壁に形成された長溝から外部に張り出されており(図14に示すようにハウジングの両側壁に配設される2つの部品からなる)、前記ピン74、76と一体的に連結されて、前記第3カムプレート66と共に遠近方向に移動可能に配設される。リリースボタン82の近位端には、ハンドル本体31内部において、ハンドル本体31の近位端部に配設された引張スプリング86が取り付けられており、この引張スプリング86によってリリースボタン82及び第3カムプレート66は常時近位側へと移動する方向に付勢されている。
【0046】
また、リリースボタン82は、ハンドル本体31の内部において、弾性のあるフックプレート88を有している(図14参照)。フックプレート88の遠位端部には、横方向に突出した凸部88aが設けられており、この凸部88aは、第2カムプレート64のカム溝64d及び第1カムプレート62の第3カム溝62c内に進入しており、これらの溝64d、62c内を移動可能となっている。
【0047】
リターンノブ80は、ハンドル本体31のハウジングの上壁に形成された長溝31cから外部に突出しており、該長溝31c内を摺動可能となっている。そして、その下部は、前記ラックバー44に一体的に連結される。
【0048】
以上のように構成されるハンドル構造を備えた外科用器具について、その動作を図5〜13より説明する。
【0049】
まず、術者が目的部位の組織を決めると、クランプトリガ32を握ることで、ジョー部12を閉じて、組織を把持する。この動作としては、図8に示すように、クランプトリガ32をグリップ部38側へ回動運動させることにより、クランプトリガ32の上端部に設けられたギア部32aが歯車42を介して、ロッドホルダ58の下面に設けられたギア面54cと噛合い、ロッドホルダ58を近位側に引き込む。ロッドホルダ58は、スリーブ22と連結しているため、ロッドホルダ58が引き込まれることで、スリーブ22も引き込まれ、スリーブ22の遠位端に設けられたアンビル16も近位側にシャフト部20内へと引き込まれる。すると、アンビル16に形成された斜面が、アウターシャフト21内に入り込み、アンビル16が閉位置へと移動する。
【0050】
ロッドホルダ58が引き込まれると、前述したように、ロックホルダ50のロックスプリング52に一体に連結されたアンビルロック54のストッパ端部54bが、ロッドホルダ58の下面の遠位側に設けられた引込面58aにはまり込み、ストッパ段部58dに係止することで、ロッドホルダ58の軸方向への移動が規制される。すなわち遠位側への移動が規制されるので、アンビル16は閉状態を保持する。
【0051】
クランプトリガ32がグリップ部38側へと反時計回りに回動するのに伴い、クランプトリガ32に設けられた規制ピン32bが、下方へと移動する。これによって、クランプトリガ32が回動する前は、前記第3カムプレート66が遠位側に移動することができないが、クランプトリガ32が回動した後は、第3カムプレート66が遠位側へと移動することが可能になる。
【0052】
この状態で、ジョー部12が把持した組織の位置が適正な場合には、次に進むが、把持した組織の位置が適正でない場合には、ジョー部12を開いてやり直す。やり直す場合には、解除レバー36をグリップ部38側に引き込むと、前述したように(図7(b)参照)、解除レバー36内に設けられた規制棒36bがアンビルロック54のロック片部54aを押し下げるために、そのストッパ端部54bが、ロッドホルダ58のストッパ段部58dから外れるので、ロッドホルダ58及びスリーブ22がスプリング60のバネ力により、遠位方向に戻り、アンビル16を開位置に移動させる。ロッドホルダ58が遠位方向に戻るのと同時に、クランプトリガ32も元の位置に戻る。こうして、必要があればやり直しを行い、縫合するべき組織を把持し、第1の作動を完了する。
【0053】
次に、リリースボタン82の解除を行う。これは、リリースボタン82をハンドル本体31に対して遠位方向へスライドさせることで行う。この動作により、リリースボタン82と一体的となったピン74、76及び第3カムプレート66も同距離だけ遠位側へ移動する。
【0054】
ところで、ピン74は、第1カムプレート62の第1カム溝62aを通過しており、ピン74が遠位方向に移動するときに、遠位方向に対して角度の付いた第1カム溝62aに沿って移動するために、第1カムプレート62は、ピン70を中心として、時計回りに回転し、図11に示すように下方に揺動する。第1カムプレート62が下方に移動すると、第1カムプレート62に設けられた第3カム溝62cの近位側の第1位置にあったフックプレート88の凸部88aが、第3カム溝62cのテーパー面に沿って移動して、図11に示す、第3カム溝62cの遠位側の第2位置へと移動する。フックプレート88の凸部88aが、第3カム溝62cの第2位置において、この第3カム溝62cに引っ掛かることによって、第1カムプレート62は、図11の傾斜位置を保持することができる。また、フックプレート88を有するリリースボタン82及び第3カムプレート66も遠位方向に移動した位置を保持する。
【0055】
こうして、第1カムプレート62が図11に示す傾斜位置に保持されると、第1カムプレート62の上端部に設けられた折曲爪部62eも当然下方に位置するので、リターンノブ80の脚部80aの遠位側への移動が可能となり、これにより、リターンノブ80及びラックバー44の遠位側への移動が可能になる。
【0056】
第3カムプレート66は、図11に示す遠位位置に保持されており、この状態で、ガイド溝66aを挿通する解除レバー36の円柱部36c及び台座36dは、ガイド溝66aの細溝部66bへと相対移動する。円柱部36c及び台座36dが細溝部66bに位置すると、台座36dが回動することができなくなり、結果として、解除レバー36を回転させることができなくなる。これにより、この状態において、不用意に解除レバー36の操作が行われてアンビル16が開くことを、防止している。
【0057】
次に、ファイヤトリガ34をグリップ部38側に反時計回りに回転させると、ファイヤトリガ34の上端部に設けられたラッチ部34aがラックバー44のラック44aに噛合い、そして、ラックバー44は、前述のように、すでに遠位側へ移動する準備ができているので、このファイヤトリガ34の回転とともに、ラックバー44及びこれに連結された駆動ロッド24が遠位側へと移動する(図12)。ファイヤトリガ34の一回の反時計回りへの回転だけでは、ステープルカートリッジ14内のテーパー部材がその全行程を移動できない場合には、ファイヤトリガ34をそのスプリング46のばね力により図10の状態に戻して、再度、グリップ部38側への反時計回りの回動を行い、必要な回数だけ反復回動を繰り返す。こうして、ステープルを打ち出して組織の縫合を行うと共に、組織の切断を行い、第2の作動が完了する。
【0058】
こうして、縫合及び切断が終了すると、手動によってリターンノブ80を近位側に移動させる(図13)。リターンノブ80をハンドル本体31のハウジング端面まで近位側に移動させると、リターンノブ80の横方向に突出している脚部80aが、第2カムプレート64の折曲爪部64eを、トーションスプリング84の付勢力に抗して、近位側へと押し込むので、第2カムプレート64も近位側に移動する。第2カムプレート64が近位側に移動すると、図11に示すように、第1カムプレート62の第3カム溝62cの第2位置に位置付けられていたフックプレート88の凸部88aが、第2カムプレート64のカム溝64dのテーパ面に沿って移動させられて、第3カム溝62cの第1位置へと戻る。
【0059】
フックプレート88の凸部88aが第1の位置に戻るのと同時に、引張スプリング86のバネ力により、ピン74、76すなわちリリースボタン82が近位側の図9に示す位置に戻る。するとピン74、76が第1カムプレート62に設けられた第1カム溝62a、第2カム溝62bに沿って移動するため、第1カムプレート62も元の位置に戻る。これに従って、第1カムプレート62は、ピン70を中心として反時計回りに回動して、元の位置に戻る。
【0060】
第3カムプレート66は、前述したようにリリースボタン82と一体的に移動するので、リリースボタン82と一緒に、図10に示す位置に戻る。これにより、その第3カムプレート66のガイド溝66aと、解除レバー36の円柱部36c及び台座36dとの間の係合関係が解除されて、解除レバー36を回転することが可能になる。
【0061】
最後に、アンビル16を開位置へ移動するための操作は、解除レバー36をグリップ部38側に引き込むと、前述したように、アンビルロック54のストッパ端部54bがロッドホルダ58のストッパ段部58dから外れて、ロッドホルダ58及びスリーブ22が遠位側に移動し、アンビル16を開位置に移動させる。こうして、外科用器具を組織から退避させることができる。
【0062】
以上の操作をまとめると、図15の表のようになる。表において、○はトリガ、ボタン、ノブが操作可能であることを表し、×は操作不可であることを表す。
【0063】
まず、スタート時つまり開始状態においては、クランプトリガ32(第1の操作部)と解除レバー36(第4の操作部)とが操作可能となっており、ファイヤトリガ34(第2の操作部)、リリースボタン82(第3の操作部)及びリターンノブ80(第5の操作部)は操作不可となっている。但し、解除レバー36は、フリーとなっているだけであり(図7(a)参照)、その規制棒36bがアンビルロック54のロック片部54aと係り合わないために、回動操作を行っても何の変化ももたらさない。ファイヤトリガ34及びリターンノブ80は、第1カムプレート62の折曲爪部62e(第1のロック部)によって回動及び移動がそれぞれ阻止されている。また、リリースボタン82は、クランプトリガ32の規制ピン32b(第2のロック部)によって遠位側への移動が阻止されている。
【0064】
次に、この状態からクランプトリガ32を完全に操作すると、クランプトリガ32がロックされて操作不可となり、リリースボタン82が操作可能に変化し、クランプ状態(第2作動開始可能状態)となる。クランプトリガ32のロックは、アンビルロック54のストッパ端部54bとロッドホルダ58のストッパ段部58d(これらで第3のロック部が構成される)との係合により行われる。この状態において、操作可能である解除レバー36を操作することにより、アンビルロック54のストッパ端部54bとロッドホルダ58との係合を解除し、スタート時に戻ることができる。また、リリースボタン82は、クランプトリガ32が回動してその規制ピン32bが下方へと退避することにより、遠位側への移動が許容される。
【0065】
次に、このリリースボタン82を操作すると、ファイヤトリガ34及びリターンノブ80が操作可能となり、解除レバー36及びリリースボタン82が操作不可に変化し、リリース状態となる。リリースボタン82は、そのフックプレート88の凸部88aが第1カムプレート62の第3カム溝62cの第2位置へと保持されることにより、ロックされる。また、解除レバー36は、リリースボタン82と一体に移動する第3カムプレート66のガイド溝66aの細溝部66b(第4のロック部)によって回動が阻止される。また、ファイヤトリガ34及びリターンノブ80は、第1カムプレート62の折曲爪部62eがリターンノブ80の脚部80aとの干渉位置から下方へと退避することにより、回動及び移動がそれぞれ可能となる。この状態で、ファイヤトリガ34を操作すると、ファイヤが行われる。
【0066】
ファイヤトリガ34及びリターンノブ80またはリターンノブ80のみを操作すると、ファイヤトリガ34及びリターンノブ80が操作不可となり、解除レバー36及びリリースボタン82が操作可能に変化してリターン時となる。この状態は、クランプ時と同じである。そして、この状態から解除レバー36を操作すると、スタート時に戻る。
【0067】
このように、本実施形態においては、トリガ、ボタン、ノブの操作手順が確定されて一貫性を有しており、誤った手順を術者が行うことはできないようになっている。その一方で、手順のやり直しが容易にできるという柔軟性を有している。例えば、クランプトリガ32を操作して、組織を把持した後、その位置が正しいかどうかの確認を行わないうちに、ファイヤトリガ34を操作することはできず、リリースボタン82の操作を行ってはじめてファイヤトリガ34を操作することができる。このリリースボタン82は、組織を把持していなければ操作することはできず、組織を把持前に縫合が始まることはない。また、万が一、リリースボタン82を操作した直後に、前の状態に戻りたい場合には、リターンノブ80を操作することで、クランプ時と同じ状態に戻ることができる。また、リリースボタン82の操作を行った後には、誤って、解除レバー36を操作してアンビル16を開くといったことはできない。これにより、縫合・切断中にアンビル16が開くといった事態は回避できる。その一方で、リリースボタン82を操作する前には、何時でも、解除レバー36を操作して、アンビル16を開き、先端作動部10の位置決めからやり直すことができる。
【0068】
【発明の効果】
以上説明したように本発明によれば、先端作動部が第2の作動開始可能状態へと遷移した後、第3の操作部を操作して、第1のロック部をロック解除状態へと遷移させるために操作することにより、第2の作動開始可能状態における確認作業を行うことができ、誤操作の可能性が低減できる。また、第3の操作部は、先端作動部が第2の作動開始可能状態となった時にのみ解除されるので、第3の操作部を第2の作動開始可能状態以外の状態で操作することにより、第2の操作部を操作可能状態にするという、誤操作も防止することができる。こうして、操作手順に一貫性を持たせることができる。
【図面の簡単な説明】
【図1】本発明の実施の形態に係るハンドル構造を含む外科用器具の全体斜視図である。
【図2】本発明のハンドル部の内部構造を表す側面図であり、スタート時の状態を表す。尚、第1ないし第3カムプレートを取り除いている。
【図3】シャフト部の一部の断面図と、ハンドル部の内部の一部を表す図である。
【図4】(a)はクランプトリガとファイヤトリガの組立体の側面図、(b)はその組立体の遠位端側から見た図である。
【図5】解除レバーと、アンビルロックの分解斜視図である。
【図6】(a)はロックホルダとアンビルロックの組立体の平面図、(b)は(a)の組立体のb−b線に沿って見た断面図である。
【図7】(a)、(b)はアンビルロックの動作を表す説明図であり、(a)はロック解除時、(b)はロック時を表す。
【図8】本発明のハンドル部の内部構造を表す側面図であり、クランプ時の状態を表す。尚、第1ないし第3カムプレートを取り除いている。
【図9】本発明のハンドル部の内部構造を表す側面図であり、スタート時の状態を表す。
【図10】本発明のハンドル部の内部構造を表す側面図であり、クランプ時の状態を表す。
【図11】本発明のハンドル部の内部構造を表す側面図であり、リリース時の状態を表す。
【図12】本発明のハンドル部の内部構造を表す側面図であり、ファイヤ時の状態を表す。
【図13】本発明のハンドル部の内部構造を表す側面図であり、リターン時の状態を表す。
【図14】第1ないし第3カムプレート及びリリースボタンの分解斜視図である。
【図15】本発明の各操作部と、その操作可能・不可の状態の遷移を表す表である。
【符号の説明】
10 先端作動部
22 スリーブ(第1の伝達部)
24 駆動ロッド(第2の伝達部)
30 ハンドル部
32 クランプトリガ(第1の操作部)
32b 規制ピン(第2のロック部)
34 ファイヤトリガ(第2の操作部)
36 解除レバー(第4の操作部)
54b ストッパ端部(第3のロック部)
58d ストッパ段部(第3のロック部)
62e 折曲爪部(第1のロック部)
66 カムプレート
66a ガイド溝
66b 細溝部
80 リターンノブ(第5の操作部)
82 リリースボタン(第3の操作部)
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a handle structure of a surgical instrument used for a surgical operation, such as an automatic suturing device for suturing a living body tissue of a human body.
[0002]
[Prior art]
With the development of medical technology in recent years, surgical instruments themselves have also become very complicated. At the same time as these surgical instruments are becoming more complicated, there are various kinds of operation methods that have become more complicated. For example, the automatic suturing device is one of them. In such an automatic suturing device, in order to perform suturing, which is the final purpose, there are roughly divided a first operation for appropriately positioning and grasping (clamping) tissue, and a cutting and suturing of tissue (also called fire). ), There is a second act of performing a second act.
[0003]
In order to cope with such two operations, a handle provided with a first trigger and a second trigger is known (for example, Patent Document 1). In the handle structure of Patent Document 1, the first trigger pivots counterclockwise from an inactive first trigger position spaced from the handgrip to a fully activated first trigger position adjacent to the handgrip. Enabled, wherein the second trigger pivots counterclockwise from an inactive second trigger position spaced from the first trigger position to a fully activated second trigger position adjacent to the first trigger. It is possible that the first trigger is located between the second trigger and the handgrip.
[0004]
Then, the end effector and the first trigger located at the distal end of the handle are connected by a first conductive assembly, and the end effector and the second trigger are connected by a second conductive assembly. Pulling the first trigger causes the first transmission assembly to move in the proximal direction to perform the first act of properly positioning tissue. Also, by pulling the second trigger, the second conductive assembly moves in the distal direction, and the second operation, tissue resection and suturing, is performed.
[0005]
Incidentally, the procedure of this operation is absolute, and such an erroneous operation is performed so that the second operation is not performed before the first operation is completed or before the first operation. Means for preventing this are required. For this reason, in Patent Document 1, when the first trigger is located at the inactive first trigger, the second trigger is prevented from turning counterclockwise by the second conductive assembly. On the other hand, when the first trigger pivots from the unactuated first trigger position toward the handgrip, the second conductive assembly moves distally to allow the second trigger to pivot. Thus, the second trigger cannot be pulled until the first trigger is pulled, but the second trigger can be pulled only after the first trigger is pulled.
[0006]
Proper positioning of the first operation, tissue positioning, is very important, so that the second operation, tissue resection and suturing, is not performed at the wrong site, and imperfect. It is necessary to carefully grasp the tissue at an accurate position so that the suture does not damage the tissue. As such, this first actuation often requires a re-start, for which the first trigger must be able to return to the unactuated first trigger position during actuation.
[0007]
On the other hand, if the second operation is started after the first operation is properly completed, it is necessary to prevent an erroneous operation such as release of tissue grasping from being performed.
[0008]
[Patent Document 1]
JP-A-10-197 (Claims, FIGS. 1, 5 to 10)
[0009]
[Problems to be solved by the invention]
In the above-mentioned conventional configuration, the release button can be operated even after the first trigger is pulled, so that the grasping of the tissue can be performed again, but the second trigger can be operated at the same time. However, there is a risk that an erroneous operation of operating the operable second trigger even though the tissue positioning, that is, the first operation is not appropriate, may be caused.
[0010]
Furthermore, since the release button can be operated even during the operation of the second trigger, there is a possibility that the first operation is released even though the second operation is being performed, which may cause a malfunction or an erroneous operation. There is.
[0011]
As described above, the conventional configuration has a problem that the means for preventing the erroneous operation is insufficient.
[0012]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a handle structure of a surgical instrument in which the possibility of erroneous operation is reduced and operation procedures are consistent. It is another object of the present invention to provide a handle structure for a surgical instrument that is consistent and has the flexibility of being easy to redo.
[0013]
[Means for Solving the Problems]
To achieve the above-mentioned object, the present invention provides a handle structure of a surgical instrument for performing an operation of a surgical instrument having a tip operating portion for performing a first operation and a second operation,
A first operation unit that is operated to perform a first operation that causes the distal end operation unit to transition from a start state to a second operation startable state;
A second operation unit operated to perform a second operation;
A first lock unit that disables operation of the second operation unit;
A third operation unit operated to change the first lock unit from the lock operation state to the unlock state,
A second lock unit for disabling the third operation unit;
Wherein the second lock portion is unlocked only when the first operating portion causes the tip operating portion to enter a second operation startable state.
[0014]
In the present invention, the first operating unit is operated, and immediately after the tip operating unit is transitioned from the start state to the second operable state, the second operating unit is brought into an operable state. No. Therefore, when the first operation is completed, it is possible to sufficiently confirm whether the first operation is appropriate, and the second operation is performed even though the first operation is inappropriate. An erroneous operation of starting operation can be prevented. After the tip operating section has transitioned to the second operation startable state, the third operating section can be operated to operate the second operating section. By requiring the operation by the third operation unit, the confirmation operation in the second operation startable state can be performed. On the other hand, the third operating section is operable only when the distal end operating section is in the second operable state, so that the third operating section is operated in a state other than the second operable state. This makes it possible to prevent an erroneous operation of setting the second operation unit to an operable state. In this way, the operation procedure can be made consistent.
[0015]
According to a second aspect of the present invention, in the first aspect, a third lock unit that disables operation of the first operation unit in order to hold the distal end operation unit in the second operation start enable state. When,
A fourth operation unit operated to change the third lock unit from the lock operation state to the unlock state,
Is further provided.
[0016]
When the first operation unit causes the distal end operation unit to enter the second operation startable state, the state is securely held by the third lock unit, and the first operation needs to be performed again. In this case, the operation can be easily performed again by operating the fourth operation unit, and the operation procedure can be given flexibility. Even if the fourth operation unit is operated, the second operation cannot be performed unless the third operation unit is operated, so that erroneous operation can be prevented.
[0017]
The invention according to claim 3 is the device according to claim 2, further comprising a fourth lock unit that disables operation of the fourth operation unit,
The third operation unit may set the fourth lock unit to a lock operation state at the same time as setting the first lock unit to the unlocked state.
[0018]
In a state where the third operation unit has been operated, a confirmation operation in the second operation startable state is performed, and the second operation unit is operable. In this state, the first operation should not be performed again. According to the present invention, when the second operation unit is operable, the operation of the fourth operation unit is disabled, so that the first operation is canceled during the second operation. An erroneous operation is reliably prevented.
[0019]
The invention according to claim 4 is the device according to claim 3, further comprising a fifth operation unit operated to transition the first lock unit from the unlocked state to the lock operation state,
The fifth operating unit is configured to set the fourth lock unit to the unlocked state at the same time as setting the first lock unit to the lock operation state.
[0020]
When the second operation is completed, or when it is necessary to stop the operation immediately before starting the second operation, the first lock unit is operated by operating the fifth operation unit. The lock operation state is set, and the operation of the second operation unit is disabled. Further, the fourth lock unit is in the unlocked state, and the operation of the fourth operation unit is enabled. By operating the fourth operation unit, the first operation unit enters an operable state. In this way, it is possible to return to the previous state or to perform the operation again, and the operation procedure can be made flexible.
[0021]
In the invention according to claim 5, the second lock portion is a restriction pin provided on the first operation portion, and the restriction pin is operated together with the operation of the first operation portion to control the operation of the third operation portion. It is characterized by moving to a position where movement is prevented and a position where movement is permitted.
[0022]
The invention according to claim 6 includes a first transmission unit that transmits an operation force of a first operation unit to the distal end operation unit,
The third lock portion is provided with a stopper step provided on the first transmission portion, and a lock stopper which can be locked to the stopper step portion and is urged toward the first transmission portion. And an end portion, when the first operating portion is operated to move the first transmission portion, the stopper end portion of the lock is locked to the stopper step portion to lock the movement of the first transmission portion. And
The locking of the stopper end of the lock from the stopper step is released by the operating force of the fourth operating portion.
[0023]
According to a seventh aspect of the present invention, the fourth operating portion has a rotating shaft, and can be rotated around the rotating shaft, and the fourth lock portion has a groove through which the rotating shaft is inserted. A groove which is integrally connected to the third operating portion to allow rotation of the rotating shaft of the fourth operating portion, and a portion which prevents rotation of the rotating shaft. And characterized in that:
[0024]
The invention according to claim 8 includes a second transmission unit that transmits an operation force of a second operation unit to the distal end operation unit, and the fifth operation unit is integrally connected to the second transmission unit. It is characterized by that.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments do not limit the present invention. In the description, the operator side is referred to as a proximal side, and the side away from the operator is referred to as a distal side.
[0026]
FIG. 1 is a perspective view of an entire surgical instrument including a handle structure according to an embodiment of the present invention. This surgical instrument is an automatic suture instrument and, similar to the main configuration of the existing one, mainly includes a tip operating portion 10 located on the distal side of the instrument, ahandle portion 30 located on the proximal side of the instrument, Theshaft section 20 connects the distal end operating section 10 and thehandle section 30.
[0027]
As will be described later, thehandle unit 30 has a clamp trigger (first trigger, first operation unit) 32 for gripping the tissue with the distal end operating unit 10 and a distal end with respect to theclamp trigger 32. A fire trigger (second trigger, second operation unit) 34 for causing the distal end working unit 10 to perform cutting and suturing is provided.
[0028]
The distal end operating portion 10 is provided with ajaw portion 12 that can be freely opened and closed to hold a body tissue. Thejaw portion 12 includes astaple cartridge 14 and ananvil 16 that is openably and closably connected to thestaple cartridge 14.
[0029]
In thestaple cartridge 14, a large number of U-shaped staples are stored in such a manner that both ends can be discharged toward theanvil 16. A plurality of rows composed of a large number of staples arranged in the longitudinal direction of thecartridge 14 are arranged in parallel in a direction perpendicular to the longitudinal direction. A taper member (not shown) having a tapered surface is slidably provided below the staples and in the longitudinal direction of thecartridge 14 to push the staples toward theanvil 16. A cutter movable together with the taper member is movably provided between two central rows of staples. The taper member is slid by adrive rod 24 of theshaft portion 20 described later, so that the staple is pushed in the direction of theanvil 16 and the cutter can move. The above-described cutting and suturing operations are known, and therefore, further description is omitted.
[0030]
As shown in FIG. 3, theshaft portion 20 includes anouter shaft 21 and a sleeve (first transmission portion) 22 that is disposed concentrically inside theouter shaft 21 and connected to theanvil 16. , A driving rod (second transmitting portion) 24 penetrating concentrically through thesleeve 22 and connected to the driving means. Proximal movement of thesleeve 22 causes theanvil 16 to close relative to thestaple cartridge 14, and distal movement causes theanvil 16 to open relative to thestaple cartridge 14. In addition, by moving thedrive rod 24 in the distal direction, the drive means is driven in the distal direction so that cutting and suturing can be performed. At the proximal end of theshaft portion 20, arotary dial 26 is rotatable together with theouter shaft 21, thesleeve 22, and thedrive rod 24. By rotating therotary dial 26, the distal end operating portion 10 is moved to theshaft portion 20. , And can be changed to a desired rotation position.
[0031]
Thehandle portion 30 shown in FIG. 1 has a handlemain body 31, theclamp trigger 32, thefire trigger 34, and therelease lever 36 that can swing with respect to the handlemain body 31. Agrip 38 fixed to thehandle body 31 extends from below thehandle body 31. Theclamp trigger 32, thefire trigger 34, and therelease lever 36 are provided in order from the proximal side with respect to thegrip portion 38.
[0032]
Theclamp trigger 32 is for closing theanvil 16 of thejaw portion 12, thefire trigger 34 is for driving staples and driving the cutter operation, and therelease lever 36 is for releasing theanvil 16. This is for opening operation.
[0033]
Hereinafter, the detailed structure of thehandle portion 30 will be described. As shown in FIG. 2, theclamp trigger 32 is pivotally mounted on the handlemain body 31 via apin 40 and is rotatable with respect to the handlemain body 31. are doing. As shown in FIG. 4, agear portion 32 a is provided at an upper end portion of theclamp trigger 32, and thegear portion 32 a always meshes with agear 42 rotatably mounted in the handlemain body 31. ing. Theclamp trigger 32 is provided with arestriction pin 32b extending in the lateral direction near thegear portion 32a (see FIG. 4B).
[0034]
Thefire trigger 34 is also pivotally attached to the handlemain body 31 by thepin 40, and is disposed rotatably with respect to the handlemain body 31. At the upper end of thefire trigger 34, there is provided alatch portion 34a which is rotatable with respect to the main body of thefire trigger 34 and is urged in a predetermined rotational direction with respect to the main body by aspring 34b. Thelatch portion 34a is disposed movably in the perspective direction above the inside of the handlemain body 31 and can mesh with arack 44a of arack bar 44 connected to thedrive rod 24. Thefire trigger 34 intersects with theclamp trigger 32 at thepin 40. Outside thehandle body 31, thefire trigger 34 is located more distally than theclamp trigger 32, and within thehandle body 31, thefire trigger 34 is , Are disposed on the proximal side of theclamp trigger 32. One end of atension spring 46 is attached to the upper part of thefire trigger 34, and constantly presses thefire trigger 34 in the clockwise rotation direction shown in the drawing. In the state of FIG. The clockwise rotation position is regulated by the stopper. Further, in the state where the stopper is restricted, the rotation of thelatch portion 34a is also restricted. Even if the lower portion of thefire trigger 34 approaches thegrip portion 38, thespring 46 urges the lower portion to return to the position shown in FIG.
[0035]
As shown in FIGS. 2 and 5, therelease lever 36 for performing the opening operation of theanvil 16 has acylindrical portion 36c protruding laterally from the main body of therelease lever 36, which is supported by the handlemain body 31. 31 is provided so as to be rotatable. Thecylindrical portion 36c further projects laterally from anoval pedestal 36d projecting from the main body of therelease lever 36. As shown in FIGS. 5 and 7, therelease lever 36 has aconcave space 36a and a regulatingrod 36b extending across theconcave space 36a at the upper distal side.
[0036]
In thehandle body 31, alock holder 50 is fixed on a distal side of therelease lever 36. As shown in FIGS. 5 and 6, thelock holder 50 has a U-shaped frame portion in a plan view, and the crossover pins 51 are provided on both end walls of the U-shape. . Alock spring 52 is wound around thepin 51. Further, similarly to thelock holder 50, the U-shaped both end walls of theanvil lock 54 having the U-shaped frame portion in a plan view are rotatably attached to thepin 51. One end of thelock spring 52 extends obliquely from below thelock holder 50 and is locked by a lockingportion 31 a (see FIG. 2) formed on thehandle body 31. The other end of thelock spring 52 extends through the U-shaped central wall of theanvil lock 54 toward therelease lever 36 at the rear. In a state where one end of thelock spring 52 is locked by the lockingportion 31a of thehandle body 31, the other end of thelock spring 52 is urged upward from the horizontal, and thus theanvil lock 54 is moved upward. Being energized. A U-shaped central wall of theanvil lock 54 projects slightly upward, and astopper end 54b at an upper end thereof abuts a lower surface of arod holder 58 described later (FIGS. 6 and 7). reference).
[0037]
Alock piece 54a extending toward the proximal side is formed on the central wall of theanvil lock 54, and thelock piece 54a extends below the regulatingrod 36b in theconcave space 36a of therelease lever 36. Has entered.
[0038]
Therod holder 58 is disposed in the handlemain body 31 so as to be movable in the near and far directions, and is connected to the proximal end of thesleeve 22 in theshaft portion 20. Thesleeve 22 and therod holder 58 are constantly urged in the distal direction by acompression spring 60 disposed in therod holder 58, and therod holder 58 is attached to astopper portion 31 b formed in thehandle body 31. The front (distal side) of the abutment prevents further distal movement.
[0039]
As shown in FIG. 7, the lower surface of therod holder 58 has a retractingsurface 58a on the distal side, a protrudingsurface 58b at the center, and agear surface 58c on the proximal side. That is, thedrawing surface 58a is a surface that is drawn above the projectingsurface 58b. The boundary between the drawingsurface 58a and the protrudingsurface 58b is astopper step 58d. Thestopper end 54b of theanvil lock 54 urged upward by thelock spring 52 is in contact with one of the protrudingsurface 58b and the retractingsurface 58a. Thegear surface 58c meshes with thegear 42. That is, when the power is transmitted to thegear 42 by rotating theclamp trigger 32 toward thegrip 38 and therod holder 58 moves in the proximal direction, the anvil Thestopper end 54b of thelock 54 fits in and is locked to thestopper step 58d, so that therod holder 58 is restricted from moving in the distal direction against the urging force of thecompression spring 60 and locked. You.
[0040]
When thestopper end 54b of theanvil lock 54 fits into thedrawing surface 58a of therod holder 58, thelock piece 54a of theanvil lock 54 comes to a position where it comes into contact with the regulatingrod 36b provided in theconcave space 36a of therelease lever 36. It moves (FIG. 7B). When therelease lever 36 is rotated in this state, the restrictingrod 36b moves thelock piece 54a of theanvil lock 54 downward, so that thestopper end 54b is disengaged from thestopper step 58d of therod holder 58. Then, therod holder 58 is released. Thus, the lock of therod holder 58 can be released.
[0041]
As shown in FIGS. 9 to 14, threefirst cam plates 62, asecond cam plate 64, and a third cam having grooves for restricting the operations of thefire trigger 34 and therelease lever 36 are provided on thehandle portion 30. Aplate 66 is provided, and therespective cam plates 62, 64, 66 are regulated bypins 72, 74 so as to be interlocked with each other. Hereinafter, this cam plate will be described.
[0042]
First, thefirst cam plate 62 is rotatably attached to the handlemain body 31 by apin 70 fixed to the handlemain body 31. As shown in FIG. 14, thefirst cam plate 62 has afirst cam groove 62a, asecond cam groove 62b, athird cam groove 62c, and afourth groove 62d. Thepin 72 fixed to thehandle body 31 is inserted into the short arc-shapedsecond cam groove 62b. Therefore, thefirst cam plate 62 is Can be swung with respect to the handlemain body 31 within a range in which can be moved. Further, abent claw portion 62e bent in the lateral direction is formed at an upper end portion of thefirst cam plate 62. In a normal state, thebent claw portion 62e is provided at a lower portion of areturn knob 80 described later. It is located immediately in front (distal side) of theleg 80a that extends laterally from the front.
[0043]
Next, thesecond cam plate 64 is disposed on the handlemain body 31 so as to be substantially superimposed on thefirst cam plate 62. Thesecond cam plate 64 has afirst guide groove 64a and a second guide plate. Agroove 64b, athird guide groove 64c, and acam groove 64d are formed. Thepin 72 penetrates thefirst guide groove 64a, whereby thefirst guide groove 64a is guided by thepin 72, so that thesecond cam plate 64 can move in the perspective direction with respect to the handlemain body 31. ing. Further, abent claw portion 64e bent in the lateral direction is formed on an upper portion of thesecond cam plate 64. In a normal state, thebent claw portion 64e is moved from a lower portion of areturn knob 80 described later. It is located immediately behind (proximal side) the laterally extendingleg 80a. The proximal end of thesecond cam plate 64 is in contact with atorsion spring 84 disposed at the proximal end of thehandle body 31, and thesecond cam plate 64 is constantly moved to the distal side by thetorsion spring 84. And it is urged in the direction of movement.
[0044]
Next, aguide groove 66a is formed at the distal side of thethird cam plate 66, and thecylindrical portion 36c of therelease lever 36 and theoval pedestal 36d are inserted through theguide groove 66a. . Theguide groove 66a is provided with anarrow groove 66b having a narrow groove width at the center thereof. Apin 74 is integrally mounted on the proximal side of thethird cam plate 66. Thepin 74 penetrates through thesecond guide groove 64b of thesecond cam plate 64 and thefirst cam groove 62a of thefirst cam plate 62, and thepin 74 relatively moves between thegrooves 64b and 62a. Thethird cam plate 66 is movable in the near and far directions with respect to the handlemain body 31 within a range in which the distance can be adjusted. Thepin 74 and thepin 76 passing through thefourth groove 62d of thefirst cam plate 62 and thethird guide groove 64c of thesecond cam plate 64 are integrally connected to therelease button 82. Therefore, thethird cam plate 66 moves integrally with therelease button 82.
[0045]
Therelease buttons 82 project outward from long grooves formed on both side walls of the housing of the handle main body 31 (composed of two parts disposed on both side walls of the housing as shown in FIG. 14). It is integrally connected to thepins 74 and 76, and is disposed so as to be movable in the near and far directions together with thethird cam plate 66. At the proximal end of therelease button 82, atension spring 86 disposed at the proximal end of thehandle body 31 is attached inside thehandle body 31, and therelease button 82 and the third cam are provided by thetension spring 86. Theplate 66 is constantly biased in a direction to move to the proximal side.
[0046]
Therelease button 82 has anelastic hook plate 88 inside the handle main body 31 (see FIG. 14). The distal end of thehook plate 88 is provided with aprotrusion 88a projecting in the lateral direction. Theprotrusion 88a is formed by acam groove 64d of thesecond cam plate 64 and a third cam of thefirst cam plate 62. It has entered thegroove 62c and is movable in thesegrooves 64d and 62c.
[0047]
Thereturn knob 80 protrudes outside from along groove 31c formed in the upper wall of the housing of the handlemain body 31, and is slidable in thelong groove 31c. The lower part is integrally connected to therack bar 44.
[0048]
The operation of the surgical instrument having the handle structure configured as described above will be described with reference to FIGS.
[0049]
First, when the operator determines the tissue of the target site, thejaw portion 12 is closed by grasping theclamp trigger 32, and the tissue is grasped. As shown in FIG. 8, as shown in FIG. 8, by rotating theclamp trigger 32 toward thegrip portion 38, thegear portion 32 a provided at the upper end portion of theclamp trigger 32 is connected to the rod holder via thegear 42. Therod holder 58 meshes with the gear surface 54c provided on the lower surface of therod 58, and retracts therod holder 58 to the proximal side. Since therod holder 58 is connected to thesleeve 22, when therod holder 58 is retracted, thesleeve 22 is also retracted, and theanvil 16 provided at the distal end of thesleeve 22 is also moved proximally into theshaft portion 20. Drawn into. Then, the slope formed on theanvil 16 enters theouter shaft 21 and theanvil 16 moves to the closed position.
[0050]
When therod holder 58 is retracted, thestopper end 54b of theanvil lock 54 integrally connected to thelock spring 52 of thelock holder 50 is provided on the distal side of the lower surface of therod holder 58 as described above. Therod holder 58 is restricted from moving in the axial direction by fitting into thesurface 58a and engaging with thestopper step 58d. That is, since the movement to the distal side is regulated, theanvil 16 holds the closed state.
[0051]
As theclamp trigger 32 rotates counterclockwise toward thegrip portion 38, therestriction pin 32b provided on theclamp trigger 32 moves downward. Thereby, thethird cam plate 66 cannot move to the distal side before theclamp trigger 32 rotates, but after theclamp trigger 32 rotates, thethird cam plate 66 moves to the distal side. It is possible to move to.
[0052]
In this state, if the position of the tissue grasped by thejaw portion 12 is proper, the process proceeds to the next step. If the position of the grasped tissue is not proper, thejaw portion 12 is opened and the process is started again. In order to start over, when therelease lever 36 is pulled toward thegrip portion 38, as described above (see FIG. 7B), therestriction rod 36b provided in therelease lever 36 is locked by thelock piece 54a of theanvil lock 54. As thestopper end 54b is disengaged from thestopper step 58d of therod holder 58, therod holder 58 and thesleeve 22 return in the distal direction by the spring force of thespring 60, and move theanvil 16 to the open position. Move. At the same time that therod holder 58 returns in the distal direction, theclamp trigger 32 returns to its original position. In this way, if necessary, the operation is performed again, the tissue to be sutured is grasped, and the first operation is completed.
[0053]
Next, therelease button 82 is released. This is performed by sliding therelease button 82 in the distal direction with respect to the handlemain body 31. With this operation, thepins 74 and 76 and thethird cam plate 66 integrated with therelease button 82 also move to the distal side by the same distance.
[0054]
By the way, thepin 74 has passed through thefirst cam groove 62a of thefirst cam plate 62, and when thepin 74 moves in the distal direction, thefirst cam groove 62a is angled with respect to the distal direction. 11, thefirst cam plate 62 rotates clockwise around thepin 70 and swings downward as shown in FIG. When thefirst cam plate 62 moves downward, theprojection 88a of thehook plate 88 located at the first position on the proximal side of thethird cam groove 62c provided in thefirst cam plate 62 is moved to thethird cam groove 62c. And moves to the second position on the distal side of thethird cam groove 62c, as shown in FIG. At the second position of thethird cam groove 62c, theprojection 88a of thehook plate 88 is hooked on thethird cam groove 62c, so that thefirst cam plate 62 can maintain the inclined position of FIG. In addition, therelease button 82 having thehook plate 88 and thethird cam plate 66 also maintain the positions moved in the distal direction.
[0055]
When thefirst cam plate 62 is held in the inclined position shown in FIG. 11 in this manner, thebent claw 62e provided at the upper end of thefirst cam plate 62 is also naturally located below. The distal movement of theportion 80a is enabled, thereby enabling thereturn knob 80 and therack bar 44 to be moved distally.
[0056]
Thethird cam plate 66 is held at the distal position shown in FIG. 11, and in this state, thecylindrical portion 36c and thepedestal 36d of therelease lever 36 that passes through theguide groove 66a are moved to thenarrow groove portion 66b of theguide groove 66a. And relative movement. When thecylindrical portion 36c and thepedestal 36d are located in thenarrow groove portion 66b, thepedestal 36d cannot rotate, and as a result, therelease lever 36 cannot be rotated. This prevents theanvil 16 from opening due to careless operation of therelease lever 36 in this state.
[0057]
Next, when thefire trigger 34 is rotated counterclockwise toward thegrip portion 38, thelatch portion 34a provided at the upper end of thefire trigger 34 meshes with therack 44a of therack bar 44, and therack bar 44 As described above, therack bar 44 and thedrive rod 24 connected thereto are moved to the distal side with the rotation of thefire trigger 34 because thefire trigger 34 is already ready to be moved to the distal side (FIG. 12). If the taper member in thestaple cartridge 14 cannot move its entire stroke by only one rotation of thefire trigger 34 in the counterclockwise direction, thefire trigger 34 is returned to the state shown in FIG. After returning, the counterclockwise rotation toward thegrip portion 38 is performed again, and the repetitive rotation is repeated a required number of times. In this way, the staples are punched out, the tissue is sutured, and the tissue is cut, thereby completing the second operation.
[0058]
When the suturing and cutting are completed, thereturn knob 80 is manually moved to the proximal side (FIG. 13). When thereturn knob 80 is moved proximally to the housing end surface of thehandle body 31, theleg 80 a projecting in the lateral direction of thereturn knob 80 causes thebent claw 64 e of thesecond cam plate 64 to move thetorsion spring 84. Thesecond cam plate 64 also moves to the proximal side because it is pushed toward the proximal side against the urging force of (2). When thesecond cam plate 64 moves to the proximal side, as shown in FIG. 11, theprojection 88a of thehook plate 88 positioned at the second position of thethird cam groove 62c of thefirst cam plate 62 is moved to the second position. Thesecond cam plate 64 is moved along the tapered surface of thecam groove 64d, and returns to the first position of thethird cam groove 62c.
[0059]
At the same time as theprojection 88a of thehook plate 88 returns to the first position, thepins 74 and 76, that is, therelease button 82 return to the proximal position shown in FIG. Then, since thepins 74 and 76 move along thefirst cam groove 62a and thesecond cam groove 62b provided in thefirst cam plate 62, thefirst cam plate 62 also returns to the original position. Accordingly, thefirst cam plate 62 rotates counterclockwise about thepin 70 and returns to the original position.
[0060]
Since thethird cam plate 66 moves integrally with therelease button 82 as described above, thethird cam plate 66 returns to the position shown in FIG. Thereby, the engagement relationship between theguide groove 66a of thethird cam plate 66, thecylindrical portion 36c of therelease lever 36, and thepedestal 36d is released, and therelease lever 36 can be rotated.
[0061]
Finally, the operation for moving theanvil 16 to the open position is as follows. When therelease lever 36 is pulled toward thegrip portion 38, thestopper end 54b of theanvil lock 54 is moved to thestopper step 58d of therod holder 58 as described above. Out of the way, therod holder 58 and thesleeve 22 move distally, moving theanvil 16 to the open position. Thus, the surgical instrument can be retracted from the tissue.
[0062]
The above operations are summarized in the table of FIG. In the table, ○ indicates that the trigger, button, and knob can be operated, and X indicates that the operation cannot be performed.
[0063]
First, at the start, that is, in the start state, the clamp trigger 32 (first operation unit) and the release lever 36 (fourth operation unit) are operable, and the fire trigger 34 (second operation unit) is operated. , The release button 82 (third operating unit) and the return knob 80 (fifth operating unit) cannot be operated. However, therelease lever 36 is only free (see FIG. 7A), and since the regulatingrod 36b does not engage with thelock piece 54a of theanvil lock 54, a rotation operation is performed. Does not change anything. The rotation and movement of thefire trigger 34 and thereturn knob 80 are prevented by thebent claw portions 62e (first lock portions) of thefirst cam plate 62, respectively. Therelease button 82 is prevented from moving to the distal side by therestriction pin 32b (second lock portion) of theclamp trigger 32.
[0064]
Next, when theclamp trigger 32 is completely operated from this state, theclamp trigger 32 is locked and becomes inoperable, therelease button 82 is changed to be operable, and a clamp state (a state in which the second operation can be started) is established. Locking of theclamp trigger 32 is performed by engagement of thestopper end 54b of theanvil lock 54 with thestopper step 58d of the rod holder 58 (these three locks are formed). In this state, by operating therelease lever 36 that can be operated, the engagement between thestopper end 54b of theanvil lock 54 and therod holder 58 can be released, and the operation can return to the start. Further, therelease button 82 is allowed to move to the distal side when theclamp trigger 32 rotates and the regulatingpin 32b retracts downward.
[0065]
Next, when therelease button 82 is operated, thefire trigger 34 and thereturn knob 80 become operable, and therelease lever 36 and therelease button 82 are changed to an inoperable state, and a release state is set. Therelease button 82 is locked by theprotrusion 88 a of thehook plate 88 being held at the second position of thethird cam groove 62 c of thefirst cam plate 62. Further, the rotation of therelease lever 36 is prevented by thenarrow groove 66b (fourth lock portion) of theguide groove 66a of thethird cam plate 66 that moves integrally with therelease button 82. In addition, thefire trigger 34 and thereturn knob 80 can be rotated and moved by retracting thebent claw 62e of thefirst cam plate 62 downward from the interference position with theleg 80a of thereturn knob 80, respectively. It becomes. When thefire trigger 34 is operated in this state, a fire is performed.
[0066]
When only thefire trigger 34 and thereturn knob 80 or thereturn knob 80 are operated, thefire trigger 34 and thereturn knob 80 become inoperable, and therelease lever 36 and therelease button 82 are changed to be operable, and a return is made. This state is the same as when clamping. Then, when therelease lever 36 is operated from this state, the operation returns to the start.
[0067]
As described above, in the present embodiment, the operation procedure of the trigger, the button, and the knob is determined and has consistency, so that the operator cannot perform an erroneous procedure. On the other hand, it has the flexibility to easily redo the procedure. For example, after operating theclamp trigger 32 and grasping the tissue, thefire trigger 34 cannot be operated without confirming whether or not the position is correct. Thefire trigger 34 can be operated. Therelease button 82 cannot be operated unless the tissue is grasped, and suturing does not start before grasping the tissue. If the user wants to return to the previous state immediately after operating therelease button 82, the user can return to the same state as when clamping by operating thereturn knob 80. After therelease button 82 is operated, therelease lever 36 cannot be operated to open theanvil 16 by mistake. Thus, a situation in which theanvil 16 is opened during suturing or cutting can be avoided. On the other hand, before operating therelease button 82, therelease lever 36 can be operated at any time to open theanvil 16 and start over from the positioning of the distal end working unit 10.
[0068]
【The invention's effect】
As described above, according to the present invention, after the distal end operating unit has transitioned to the second operation startable state, the third operating unit is operated to transition the first lock unit to the unlocked state. By performing the operation for performing the operation, it is possible to perform the checking operation in the second operation startable state, and it is possible to reduce the possibility of an erroneous operation. Further, the third operation unit is released only when the distal end operation unit is in the second operation startable state, so that the third operation unit is operated in a state other than the second operation startable state. Accordingly, it is possible to prevent an erroneous operation of setting the second operation unit to an operable state. In this way, the operation procedure can be made consistent.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a surgical instrument including a handle structure according to an embodiment of the present invention.
FIG. 2 is a side view showing the internal structure of the handle portion of the present invention, showing a state at the time of start. The first to third cam plates have been removed.
FIG. 3 is a cross-sectional view of a part of a shaft part and a view showing a part of the inside of a handle part.
FIG. 4A is a side view of an assembly of a clamp trigger and a fire trigger, and FIG. 4B is a view of the assembly as viewed from the distal end side.
FIG. 5 is an exploded perspective view of a release lever and an anvil lock.
FIG. 6A is a plan view of an assembly of a lock holder and an anvil lock, and FIG. 6B is a cross-sectional view of the assembly of FIG.
FIGS. 7A and 7B are explanatory diagrams showing an operation of an anvil lock, wherein FIG. 7A shows a state of unlocking, and FIG. 7B shows a state of locking.
FIG. 8 is a side view showing the internal structure of the handle portion of the present invention, showing a state at the time of clamping. The first to third cam plates have been removed.
FIG. 9 is a side view showing the internal structure of the handle portion of the present invention, showing a state at the time of start.
FIG. 10 is a side view showing the internal structure of the handle portion of the present invention, showing a state at the time of clamping.
FIG. 11 is a side view showing the internal structure of the handle portion of the present invention, showing a state at the time of release.
FIG. 12 is a side view showing the internal structure of the handle portion of the present invention, showing a state at the time of fire.
FIG. 13 is a side view showing the internal structure of the handle portion of the present invention, showing a state at the time of return.
FIG. 14 is an exploded perspective view of first to third cam plates and a release button.
FIG. 15 is a table showing each operation unit of the present invention and a transition of an operable / unavailable state thereof.
[Explanation of symbols]
10 tip operating part
22 sleeve (first transmission part)
24 Drive rod (second transmission unit)
30 Handle
32 Clamp trigger (first operation unit)
32b regulating pin (second lock part)
34 Fire trigger (second operation unit)
36 Release lever (fourth operation unit)
54b Stopper end (third lock part)
58d Stopper step (third lock part)
62e Folding claw part (first lock part)
66 cam plate
66a Guide groove
66b Narrow groove
80 Return knob (fifth operation unit)
82 Release button (third operation unit)

Claims (8)

Translated fromJapanese
第1の作動と第2の作動とを行う先端作動部を有する外科用器具の操作を行うための外科用器具のハンドル構造であって、
先端作動部を開始状態から第2の作動開始可能状態へと遷移させる第1の作動を行うために操作される第1の操作部(32)と、
第2の作動を行うために操作される第2の操作部(34)と、
第2の操作部を操作不可にする第1のロック部と、
前記第1のロック部をロック作動状態からロック解除状態へと遷移させるために操作される第3の操作部(82)と、
第3の操作部を操作不可にする第2のロック部と、
を備え、第2のロック部は、第1の操作部によって前記先端作動部が第2の作動開始可能状態となった時にのみロック解除状態となることを特徴とする外科用器具のハンドル構造。
A handle structure of a surgical instrument for operating a surgical instrument having a tip operating portion for performing a first operation and a second operation,
A first operation unit (32) that is operated to perform a first operation of transitioning the distal end operation unit from the start state to the second operation startable state;
A second operation unit (34) operated to perform a second operation;
A first lock unit that disables operation of the second operation unit;
A third operation unit (82) operated to change the first lock unit from the lock operation state to the unlock state,
A second lock unit for disabling the third operation unit;
Wherein the second lock portion is unlocked only when the distal end operating portion is brought into the second operation startable state by the first operating portion.
前記先端作動部を前記第2の作動開始可能状態に保持するために、第1の操作部を操作不可とする第3のロック部と、
該第3のロック部をロック作動状態からロック解除状態へと遷移させるために操作される第4の操作部(36)と、
をさらに備えることを特徴とする請求項1記載の外科用器具のハンドル構造。
A third lock unit that disables operation of the first operation unit in order to hold the distal end operation unit in the second operation start enable state;
A fourth operation unit (36) operated to change the third lock unit from the lock operation state to the unlock state,
The handle structure of a surgical instrument according to claim 1, further comprising:
前記第4の操作部を操作不可にする第4のロック部をさらに備え、
前記第3の操作部は、前記第1のロック部をロック解除状態にすると同時に、第4のロック部をロック作動状態にすることを特徴とする請求項2記載の外科用器具のハンドル構造。
A fourth lock unit that disables operation of the fourth operation unit;
3. The handle structure for a surgical instrument according to claim 2, wherein the third operating section sets the first lock section in an unlocked state and simultaneously sets the fourth lock section in a locked operation state.
第1のロック部をロック解除状態からロック作動状態へと遷移させるために操作される第5の操作部(80)をさらに備え、
該第5の操作部は、前記第1のロック部をロック作動状態にすると同時に、第4のロック部をロック解除状態にすることを特徴とする請求項3記載の外科用器具のハンドル構造。
A fifth operation unit (80) that is operated to transition the first lock unit from the unlocked state to the locked operation state;
4. The handle structure for a surgical instrument according to claim 3, wherein the fifth operating portion sets the first lock portion in a lock operation state and simultaneously sets the fourth lock portion in an unlocked state.
前記第2のロック部は、第1の操作部に設けられた規制ピン(32b)であり、該規制ピンが第1の操作部の操作と共に、前記第3の操作部の移動を阻止する位置と、移動を許容する位置とに移動することを特徴とする請求項1ないし4のいずれか1項に記載の外科用器具のハンドル構造。The second lock portion is a restriction pin (32b) provided on the first operation portion, and the position where the restriction pin prevents the movement of the third operation portion together with the operation of the first operation portion. The handle structure of a surgical instrument according to any one of claims 1 to 4, wherein the handle structure moves to a position where movement is permitted.第1の操作部の操作力を前記先端作動部に伝達する第1の伝達部(22)を備え、
前記第3のロック部は、該第1の伝達部に設けられたストッパ段部(58d)と、該ストッパ段部(58d)に係止可能となり、該第1の伝達部の方へと付勢されるロックのストッパ端部(54b)とから構成され、第1の操作部が操作されて第1の伝達部が移動すると、ロックのストッパ端部(54b)がストッパ段部(58d)に係止されて第1の伝達部の移動をロックするものであり、
前記第4の操作部の操作力により、前記ロックのストッパ端部のストッパ段部からの係止が外れることを特徴とする請求項2ないし5のいずれか1項に記載の外科用器具のハンドル構造。
A first transmission unit (22) for transmitting an operation force of a first operation unit to the distal end operation unit,
The third lock portion can be locked to a stopper step (58d) provided on the first transmission portion and to the stopper step (58d), and is attached to the first transmission portion. When the first operating part is operated to move the first transmission part, the stopper end part (54b) of the lock is moved to the stopper step part (58d). Locked to lock the movement of the first transmission unit,
The handle of a surgical instrument according to any one of claims 2 to 5, wherein the locking of the stopper end of the lock from the stopper step is released by an operating force of the fourth operating portion. Construction.
第4の操作部は回動軸(36c)を有し、回動軸を中心として回転操作可能であり、第4のロック部は、前記回動軸が挿通する溝(66a)を有するプレート(66)からなり、該プレートの溝(66a)は、第3の操作部に一体的に連結されて第4の操作部の回動軸の回動を許容する部位と、回動軸の回動を阻止する部位(66b)とを有することを特徴とする請求項3または6に記載の外科用器具のハンドル構造。The fourth operating portion has a rotating shaft (36c) and is rotatable about the rotating shaft. The fourth lock portion has a plate (66a) having a groove (66a) through which the rotating shaft is inserted. 66), and the groove (66a) of the plate is integrally connected to the third operating portion to allow rotation of the rotating shaft of the fourth operating portion; The handle structure for a surgical instrument according to claim 3 or 6, further comprising a portion (66b) for preventing the operation of the surgical instrument.第2の操作部の操作力を前記先端作動部に伝達する第2の伝達部(24)を備え、前記第5の操作部は第2の伝達部と一体的に連結されることを特徴とする請求項4または7記載の外科用器具のハンドル構造。A second transmission section (24) for transmitting an operation force of a second operation section to the distal end operation section, wherein the fifth operation section is integrally connected to the second transmission section. The handle structure of a surgical instrument according to claim 4 or 7, wherein
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