JP2006314519A - Forceps - Google Patents

Forceps Download PDF

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JP2006314519A
JP2006314519A JP2005139735A JP2005139735A JP2006314519A JP 2006314519 A JP2006314519 A JP 2006314519A JP 2005139735 A JP2005139735 A JP 2005139735A JP 2005139735 A JP2005139735 A JP 2005139735A JP 2006314519 A JP2006314519 A JP 2006314519A
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claw member
movable claw
movable
forceps
fixed
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Akira Ogura
章 小倉
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Fujinon Sano Corp
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Fujinon Sano Corp
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Priority to JP2005139735A priority Critical patent/JP2006314519A/en
Priority to CN200610081807A priority patent/CN100594003C/en
Publication of JP2006314519A publication Critical patent/JP2006314519A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a forceps which can be composed of a small number of parts and which exhibits a high operability. <P>SOLUTION: The forceps 1 is composed of three constituents: a flexible cord 2, a fixed nail member 10 on the fixed side and a movable nail member 20 on the movable side, and an operating member 30 for performing their opening and closing operations by remote control. The fixed nail member 10 is provided with a gripping nail 11 at its end. An intermediate part is a boss part in which a pin insertion hole is formed and a proximal end part is a connection part 23 to which the flexible cord 2 is connected. The movable nail member 20 is provided with a gripping nail 21 which gets into or out of contact with the edge line of the gripping nail 11 at its end and a pivotally supporting part 22 provided with a pivotally supporting pin 24 mounted in the pin insertion hole. The proximal end of the pivotally supporting part 22 is a connection part 23 to which the end of the operating member 30 is coupled. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、内視鏡の処置具挿通チャンネル等に挿通されて、患部の摘出等の処置を施すために用いられる鉗子に関するものである。   The present invention relates to a forceps that is inserted into a treatment instrument insertion channel or the like of an endoscope and used for performing treatment such as extraction of an affected area.

内視鏡の処置具挿通チャンネル内に挿通して患部の摘出等の処置を施すために、鉗子が用いられる。鉗子は、例えば特許文献１に示されているように、密着コイル等からなる可撓性コードの先端に支持部材を設けて、この支持部材に作動部を装着する構成としたものが一般的である。作動部は開閉可能な一対の把持爪からなり、把持爪はリンク機構により開閉駆動される構成としている。リンク機構は複数のリンク部材から構成され、各把持爪はそれぞれリンク部材に枢着されており、操作ワイヤからなる遠隔操作手段によりこのリンク部材を作動させることによって、リンク部材を作動させて、両把持爪を開閉させる構成としている。   Forceps are used to insert into the treatment instrument insertion channel of the endoscope and perform treatment such as extraction of the affected area. For example, as shown in Patent Document 1, for example, a forceps generally has a structure in which a support member is provided at the distal end of a flexible cord made of a contact coil and the like, and an operating portion is attached to the support member. is there. The actuating part is composed of a pair of gripping claws that can be opened and closed, and the gripping claws are configured to be opened and closed by a link mechanism. The link mechanism is composed of a plurality of link members, and each gripping claw is pivotally attached to the link member. By operating the link member by remote operation means comprising an operation wire, the link member is operated, The gripping claws are configured to open and close.

以上のように構成することによって、内視鏡による検査の結果、例えば病変部の疑いのある箇所が発見されると、把持爪を閉鎖状態にした鉗子を処置具挿通チャンネル内に挿入して、その先端に設けた把持爪を処置具挿通チャンネルから突出させる。把持爪が患部等に対応する位置に配置されると、把持爪を開閉する手段を操作して、把持爪を開くようにする。そして、一対からなる把持爪の先端を体腔内壁に当接させるか、若しくは近接した位置において、把持爪を閉じる方向に操作することにより、患部の組織をサンプリングしたり、腫瘍を摘出したりする等といった処置が施されることになる。
特開２００１−２９９６８９号公報 By configuring as described above, as a result of the examination by the endoscope, for example, when a suspicious portion of a lesion is found, a forceps with the grasping nail closed is inserted into the treatment instrument insertion channel, The grasping claw provided at the tip is protruded from the treatment instrument insertion channel. When the gripping claw is arranged at a position corresponding to the affected part or the like, the gripping claw is opened by operating a means for opening and closing the gripping claw. Then, the tip of the pair of gripping claws is brought into contact with the inner wall of the body cavity, or the gripping claws are operated in the close direction at a position close thereto, thereby sampling the affected tissue or removing the tumor, etc. Such a treatment will be performed.
JP 2001-299689 A

ところで、鉗子は被検者の体内に挿入され、しかも体内組織を取り出すこと等の点で、使用中に汚損されることになる。従って、たとえ使用後に洗浄するにしても、鉗子を繰り返し使用することは衛生上の観点から好ましいものではない。つまり、１度使用した後は廃棄する、所謂使い捨てとすることが望まれる。このためには、鉗子は安価に製造できるものでなければならない。しかしながら、前述した特許文献１に示されている鉗子にあっては、可撓性コードを構成する密着コイルの先端に設けられる部材として、少なくとも２個の把持爪と、これら把持爪を支持する支持部材，２個の把持爪を相対回動させるための支軸及びリンク部材、さらにこのリンク部材を操作するための操作ワイヤが必要となり、部品点数が多い分だけ製造コストが高くなる。この点から、鉗子を構成する部品の点数を少なくすることが望ましい。   By the way, the forceps are contaminated during use in terms of being inserted into the body of the subject and taking out the body tissue. Therefore, even if it is washed after use, it is not preferable from the viewpoint of hygiene to use forceps repeatedly. In other words, it is desirable to make a so-called disposable that is discarded after being used once. For this purpose, the forceps must be inexpensive to manufacture. However, in the forceps shown in Patent Document 1 described above, at least two gripping claws and a support for supporting these gripping claws are provided as members provided at the tips of the contact coils constituting the flexible cord. A member, a support shaft for relatively rotating the two gripping claws and a link member, and an operation wire for operating the link member are required, and the manufacturing cost increases as the number of parts increases. From this point, it is desirable to reduce the number of parts constituting the forceps.

本発明は以上の点に鑑みてなされたものであって、その目的とするところは、少ない部品点数で鉗子を構成することができ、かつ操作性が良好な鉗子を提供することにある。   The present invention has been made in view of the above points. An object of the present invention is to provide a forceps that can be configured with a small number of parts and that has good operability.

前述した目的を達成するために、本発明は、可撓性コードの先端に固定的に設けた固定爪部材と、この固定爪部材に対して開閉可能となった可動爪部材と、この可動爪部材を開閉駆動するための操作部材とを備え、前記操作部材は、前記可撓性コード内に挿通され、前記可動爪部材にその先端を連結した曲げ方向に可撓性を有する線材から構成され、前記操作部材には、その先端近傍には曲折部が設けられて、この曲折部から先端側が前記可動爪部材を開く方向に押動する可動爪開放駆動手段とする構成したことをその特徴とするものである。   In order to achieve the above-described object, the present invention provides a fixed claw member fixedly provided at the tip of a flexible cord, a movable claw member that can be opened and closed with respect to the fixed claw member, and the movable claw. An operating member for opening and closing the member, and the operating member is inserted into the flexible cord, and is composed of a wire material having flexibility in a bending direction in which a distal end is connected to the movable claw member. The operation member is provided with a bent portion in the vicinity of the distal end thereof, and is configured as a movable claw opening driving means for pushing the movable claw member in the direction of opening the movable claw member from the bent portion. To do.

可撓性コードは、例えば可撓性のある樹脂のスリーブや、金属線材の密着コイル等で構成することができる。この可撓性コードの先端に固定爪部材を直接連結し、また可動爪部材はこの固定爪部材に開閉可能に連結する構成としている。ここで、固定爪部材または可動爪部材のいずれか一方にはピンが一体的に設けられ、相手方の部材にはボス部が設けられ、もって可動爪部材を構成する可動爪が固定爪部材を構成する固定爪に開閉可能に連結される。操作部材は曲げ方向に可撓性を有する線材、例えばばね性を有する線材から構成され、この線材の先端近傍部を曲折することにより可動爪部材を開く方向に付勢することができる。なお、繰り返し作動させる場合には、操作部材の曲折形状を維持するために、この操作部材を形状記憶合金で構成しても良い。いずれにしろ、可動爪部材は操作部材により開く方向に付勢されており、この操作部材を基端側に引っ張ることにより閉じるように動作する。可動爪部材を閉じる方向に操作するために操作部材を備えるが、この操作部材は可動爪部材を開く方向に付勢する駆動手段としても機能する。これによって、鉗子の先端部分を構成する部品の数は、固定爪部材，可動爪部材及び操作部材の３部材とすることができるので、部品点数が少なく、安価に製造できる。   The flexible cord can be formed of, for example, a flexible resin sleeve, a metal wire adhesive coil, or the like. A fixed claw member is directly connected to the distal end of the flexible cord, and the movable claw member is connected to the fixed claw member so as to be opened and closed. Here, either one of the fixed claw member and the movable claw member is integrally provided with a pin, and the other member is provided with a boss portion, so that the movable claw constituting the movable claw member constitutes the fixed claw member. It is connected to the fixed claw to open and close. The operation member is composed of a wire rod having flexibility in the bending direction, for example, a wire rod having springiness, and can be urged in a direction to open the movable claw member by bending the vicinity of the tip of the wire rod. In the case of repeated operation, the operation member may be made of a shape memory alloy in order to maintain the bent shape of the operation member. In any case, the movable claw member is biased in the opening direction by the operation member, and operates so as to be closed by pulling the operation member to the proximal end side. An operation member is provided to operate the movable claw member in the closing direction. The operation member also functions as a driving unit that biases the movable claw member in the opening direction. As a result, the number of parts constituting the distal end portion of the forceps can be three members, that is, a fixed claw member, a movable claw member, and an operation member.

可撓性コードの先端に設けられている作動部としては、固定爪部材と可動爪部材とから構成されており、固定爪部材は可撓性コードの先端に固定されている。そこで、この固定爪部材を切刃状に形成することによって、可動爪部材が開いたときに、体腔内壁に所定の深さ分だけ刺入することができる。そして、可動爪部材が固定爪部材に対して９０°の角度位置となると、それ以上回動しないように保持するストッパを設ける。これによって、可動爪部材が開いたときの固定爪部材の突出長さ寸法に応じて、その体腔内への刺入時の深さを制御することができる。これによって、細胞の採取等といった操作を安全に行うことができる。   The operating portion provided at the tip of the flexible cord is composed of a fixed claw member and a movable claw member, and the fixed claw member is fixed to the tip of the flexible cord. Therefore, by forming the fixed claw member in a cutting edge shape, when the movable claw member is opened, it can be inserted into the body cavity inner wall by a predetermined depth. A stopper is provided to hold the movable claw member so that it does not rotate any more when the movable claw member is at an angle of 90 ° with respect to the fixed claw member. Accordingly, the depth at the time of insertion into the body cavity can be controlled according to the protruding length dimension of the fixed claw member when the movable claw member is opened. Thereby, operations such as cell collection can be performed safely.

このように構成することによって、鉗子の構成が簡略化されて、部品点数を少なくすることができる。   With this configuration, the configuration of the forceps is simplified, and the number of parts can be reduced.

以下、図面に基づいて本発明の実施の形態について説明する。まず、図１及び図２に鉗子の先端部分の構成を示す。図中において、１は鉗子であり、この鉗子１は内視鏡の処置具挿通チャンネル内に挿通するのに適したものである。鉗子１は可撓性コード２の先端に作動部３を連結して設けたものである。ここで、可撓性コード２は密着コイルで構成されており、これによって中空で、曲げ方向に可撓性のある長尺コードとなっている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, FIG.1 and FIG.2 shows the structure of the front-end | tip part of forceps. In the figure, reference numeral 1 denotes a forceps, which is suitable for being inserted into a treatment instrument insertion channel of an endoscope. The forceps 1 is provided by connecting an operating portion 3 to the tip of a flexible cord 2. Here, the flexible cord 2 is composed of a close-contact coil, which is hollow and is a long cord that is flexible in the bending direction.

作動部３は一対の開閉可能な爪部材から構成されている。１０は把持爪１１を備えた固定側爪部材であり、２０は固定側の把持爪１１に対して近接・離間する方向に回動可能な把持爪２１を有する可動側爪部材である。そして、可撓性コード２の先端部は固定爪部材１０に連結されている。   The operation part 3 is comprised from a pair of nail | claw member which can be opened and closed. Reference numeral 10 denotes a fixed claw member provided with the grip claw 11, and reference numeral 20 denotes a movable claw member having a grip claw 21 which can be rotated in a direction approaching and separating from the fixed claw 11 on the fixed side. The distal end portion of the flexible cord 2 is connected to the fixed claw member 10.

固定爪部材１０は、その先端部に把持爪１１が形成されており、中間部はピン挿通孔１２ａを穿設したボス部１２となっている。さらに、固定爪部材１０の基端側の部位は円環状となった連結部１３となっており、この連結部１３には可撓性コード２の先端部が所定の長さ挿嵌されて、蝋付けやはんだ付け等の手段で固着されている。把持爪１１はカップ状となっており、図３から明らかなように、その先端部は鋭利となった切刃部１１ａを構成している。そして、把持爪１１は、先端の切刃部１１ａに向かうに応じて斜め下方に傾斜しており、これによって根元部分には高い強度を保持している。さらに、把持爪１１の凹状となった部位の中央部分には概略円形の開口部１４が形成されている。   The fixed claw member 10 has a grip claw 11 formed at the tip thereof, and the intermediate portion is a boss portion 12 having a pin insertion hole 12a. Further, the base end side portion of the fixed claw member 10 is an annular connecting portion 13, and the distal end portion of the flexible cord 2 is inserted into the connecting portion 13 for a predetermined length, It is fixed by means such as brazing or soldering. The grasping claw 11 has a cup shape, and, as is apparent from FIG. 3, the tip portion thereof constitutes a sharp cutting edge portion 11 a. And the holding nail | claw 11 inclines below diagonally as it goes to the cutting edge part 11a of the front-end | tip, and, thereby, the root part has high intensity | strength. Furthermore, a substantially circular opening 14 is formed in the central portion of the concave portion of the gripping claw 11.

可動爪部材２０は把持爪２１を先端に有し、この把持爪２１は伏椀状となっており、把持爪１１の稜線部分に当接するようになっている。把持爪２１はその全体が丸みを帯びたものであるが、先端部は体内組織に対して円滑に切り込むために、鉛直方向の切り欠き部２１ａが形成されて直線部となっている。また、可動爪部材２０の中間部は枢支部２２、基端部は連結部２３である。図４から明らかなように、枢支部２２には枢支ピン２４が一体的に設けられており、この枢支ピン２４は固定爪部材１０のボス部１２に設けたピン挿通孔１２ａに挿通されて、かしめ等により回動自在に固定されており、これにより固定爪部材１０と可動爪部材２０とが組み付けられることになる。   The movable claw member 20 has a gripping claw 21 at its tip, and the gripping claw 21 has a prone shape and comes into contact with a ridge line portion of the gripping claw 11. Although the gripping claw 21 is rounded as a whole, the tip portion is a straight portion formed with a vertical cutout portion 21a in order to smoothly cut into the body tissue. Further, the middle part of the movable claw member 20 is a pivotal support part 22, and the base end part is a connection part 23. As is clear from FIG. 4, a pivot pin 24 is provided integrally with the pivot portion 22, and this pivot pin 24 is inserted into a pin insertion hole 12 a provided in the boss portion 12 of the fixed claw member 10. Thus, the fixed claw member 10 and the movable claw member 20 are assembled together.

従って、可動爪部材２０は枢支ピン２４を中心として回動可能に固定爪部材１０と連結され、把持爪１１，２１の開閉時に、この固定爪部材１０のボス部１２は可動爪部材２０の枢支部２２と摺動することになり、このために所定の面積を有する摺動面が枢支ピン２４の軸線と直交する方向に形成されている。なお、２５は把持爪１１の開口部１４と対応する位置に設けた把持爪２１側の開口部である。   Therefore, the movable claw member 20 is connected to the fixed claw member 10 so as to be rotatable about the pivot pin 24, and the boss portion 12 of the fixed claw member 10 is connected to the movable claw member 20 when the gripping claws 11, 21 are opened and closed. For this purpose, a sliding surface having a predetermined area is formed in a direction perpendicular to the axis of the pivot pin 24. Reference numeral 25 denotes an opening on the gripping claw 21 side provided at a position corresponding to the opening 14 of the gripping claw 11.

可動爪部材２０の基端部に形成されている連結部２３は操作部材３０の先端部が連結される部位であり、この操作部材３０により把持爪２１が遠隔操作により枢支ピン２４を中心として回動操作されることになる。操作部材３０は、ばね性を有する鋼線からなり、その先端は連結部２３の止着孔２６に止着され、固定爪部材１０の連結部１３から可撓性コード２の内部に挿通されている。そして、操作部材３０の先端近傍の位置に第１の曲折部３０ａが形成されており、また先端に直近位置に第２の曲折部３０ｂが形成され、さらに先端部には第３の曲折部３０ｃが形成されている。ここで、操作部材３０における第１の曲折部３０ａの角度は鈍角となっており、この第１の曲折部３０ａより先端側に位置する第２の曲折部３０ｂは枢支ピン２４の軸線と平行な方向に概略９０°曲げられており、第３の曲折部３０ｃはこの枢支ピン２４の軸線と直交する方向に概略９０°曲げられている。そして、第２の曲折部３０ｂから第３の曲折部３０ｃまでの間は止着孔２６への挿入部であり、第３の曲折部３０ｃから先端側の部位は止着孔２６からの抜け止め部として機能する。   The connecting portion 23 formed at the base end portion of the movable claw member 20 is a portion to which the distal end portion of the operation member 30 is connected, and the gripping claw 21 is centered on the pivot pin 24 by remote operation by the operation member 30. It will be rotated. The operation member 30 is made of a steel wire having spring properties, and the tip thereof is fixed to the fixing hole 26 of the connecting portion 23, and is inserted into the flexible cord 2 from the connecting portion 13 of the fixed claw member 10. Yes. A first bent portion 30a is formed at a position near the tip of the operation member 30, a second bent portion 30b is formed at a position closest to the tip, and a third bent portion 30c is further formed at the tip. Is formed. Here, the angle of the first bent portion 30 a in the operation member 30 is an obtuse angle, and the second bent portion 30 b located on the distal end side from the first bent portion 30 a is parallel to the axis of the pivot pin 24. The third bent portion 30c is bent approximately 90 ° in a direction perpendicular to the axis of the pivot pin 24. A portion between the second bent portion 30b and the third bent portion 30c is an insertion portion into the fixing hole 26, and a portion on the tip side from the third bent portion 30c is prevented from coming off from the fixing hole 26. It functions as a part.

操作部材３０における第１の曲折部３０ａは、可動爪部材２０の開閉操作を行う部位であり、操作部材３０の可動爪部材２０における連結部２３への連結位置から所定の長さだけ基端側の位置に形成されている。そして、操作部材３０の可動爪部材２０における連結部２３への連結位置は、枢支ピン２４の回動中心位置を含む中心線Ａ（図１）に対して、可動爪部材２０が開く方向にＤだけオフセットしている。第１の曲折部３０ａは常に可撓性コード２の内面と当接しており、この当接位置から先端側は可動爪部材２０が開く方向に向けて傾斜している（図３及び図６参照）。従って、操作部材３０を可撓性コード２の内部側に引き込んだ状態では、可動爪部材２０は、その把持爪２１が把持爪１１に接合された閉鎖状態に保持されるが、操作部材３０を押し出すように操作すると、可動爪部材２０は枢支ピン２４を中心として回動して、把持爪２１が開くようになる。   The first bent portion 30a of the operation member 30 is a part that opens and closes the movable claw member 20, and is a base end side by a predetermined length from the connection position of the operation member 30 to the connection portion 23 of the movable claw member 20. It is formed at the position. And the connection position to the connection part 23 in the movable claw member 20 of the operation member 30 is the direction which the movable claw member 20 opens with respect to the centerline A (FIG. 1) including the rotation center position of the pivot pin 24. It is offset by D. The first bent portion 30a is always in contact with the inner surface of the flexible cord 2, and the tip end side is inclined toward the opening direction of the movable claw member 20 from this contact position (see FIGS. 3 and 6). ). Therefore, in a state where the operation member 30 is pulled into the inner side of the flexible cord 2, the movable claw member 20 is held in a closed state in which the grip claw 21 is joined to the grip claw 11. When operated to push, the movable claw member 20 rotates about the pivot pin 24 and the grip claw 21 opens.

操作部材３０は可撓性コード２の内部から固定爪部材１０における連結部１３の内部を通り、この固定爪部材１０のボス部１２と可動爪部材２０の枢支部２２との間を通って、その第２の曲折部３０ｂから先端側の部位が内側から止着孔２６に挿通され、またこの第２の曲折部３０ｂと直交する方向に曲げられた第３の曲折部３０ｃから先端までの部位を止着孔２６から導出させることによって、操作部材３０が可動爪部材２０から脱落するのを防止する抜け止め機能が発揮される。そして、止着孔２６を貫通させて可動爪部材２０の外面側に導出された操作部材３０の第３の曲折部３０ｃから先端までの部位が可動爪部材２０の外面から突出しないようにするために、止着孔２６の周囲には、操作部材３０の直径分以上の深さを有する凹部２７が形成されている。   The operation member 30 passes from the inside of the flexible cord 2 through the inside of the connecting portion 13 of the fixed claw member 10, and passes between the boss portion 12 of the fixed claw member 10 and the pivot portion 22 of the movable claw member 20, The portion from the second bent portion 30b to the tip end portion is inserted from the inside into the fastening hole 26 and bent in a direction perpendicular to the second bent portion 30b. The lead-out preventing function for preventing the operating member 30 from falling off the movable claw member 20 is exhibited by deriving from the fixing hole 26. In order to prevent the portion from the third bent portion 30 c of the operation member 30 led out to the outer surface side of the movable claw member 20 through the fixing hole 26 from protruding from the outer surface of the movable claw member 20. In addition, a recess 27 having a depth equal to or larger than the diameter of the operation member 30 is formed around the fastening hole 26.

以上のようにして可動爪部材２０は固定爪部材１０に対して開閉動作を行うが、図１に仮想線で示し、また後述の図６に示したように、可動爪部材２０の固定爪部材１０に対する最大開度は概略９０°となっており、可動爪部材２０は固定爪部材１０に対してほぼ直交する状態以上には開かないようにしている。ここで、固定爪部材１０と可動爪部材２０とは、それらの把持爪１１，２１は上下に接離するものであり、これに対してボス部１２及び連結部１３は、枢支部２２及び連結部２３と左右に接合されている。従って、可動爪部材２０が枢支ピン２４を中心として回動すると、枢支部２２が固定爪部材１０の把持爪１１の側方への張り出し部分と当接して、それ以上回動できなくなる。このように、把持爪１１の端壁部１１ｂと、枢支部２２の下面部２２ａとが当接したときに、可動爪部材２０が固定爪部材１０に対してほぼ直交する角度状態となるように設定している。   Although the movable claw member 20 opens and closes the fixed claw member 10 as described above, the fixed claw member of the movable claw member 20 is shown in phantom lines in FIG. 1 and as shown in FIG. The maximum opening with respect to 10 is approximately 90 °, and the movable claw member 20 is prevented from opening beyond a state substantially orthogonal to the fixed claw member 10. Here, the fixed claw member 10 and the movable claw member 20 are such that their gripping claws 11 and 21 are vertically contacted, and the boss portion 12 and the connecting portion 13 are connected to the pivot portion 22 and the connecting portion. The part 23 is joined to the left and right. Therefore, when the movable claw member 20 is rotated about the pivot pin 24, the pivot portion 22 comes into contact with the protruding portion of the fixed claw member 10 to the side of the grip claw 11 and cannot be rotated any further. Thus, when the end wall portion 11b of the gripping claw 11 and the lower surface portion 22a of the pivotal support portion 22 come into contact with each other, the movable claw member 20 is in an angle state substantially orthogonal to the fixed claw member 10. It is set.

以上のように構成される鉗子１は、その構成部材としては、可撓性コード２と、図５に示したように、固定側の固定爪部材１０及び可動側の可動爪部材２０と、その開閉動作を遠隔操作で行うための操作部材３０からなる３部材とである。従って、この鉗子１は部品点数が極めて少なく、組み付けも簡単であることから、鉗子１を安価に製造できる。   The forceps 1 configured as described above includes, as its constituent members, a flexible cord 2, a fixed claw member 10 on a fixed side, a movable claw member 20 on a movable side, as shown in FIG. The three members are composed of the operation member 30 for performing the opening / closing operation by remote operation. Therefore, the forceps 1 has a very small number of parts and is easy to assemble, so that the forceps 1 can be manufactured at a low cost.

このように、構造が簡単であるのにも拘らず、組織細胞の採取を行うに当っては、高い能力を発揮する。鉗子１を内視鏡の処置具挿通チャンネル内に挿入する際には、操作部材３０を引っ張ることによって、この操作部材３０の第１の曲折部３０ａを後退させる。これによって、可動爪部材２０の把持爪２１が把持爪１１に当接して、把持爪１１，２１が閉鎖状態になり、鉗子１は円滑に処置具挿通チャンネル内を進行することになる。そして、鉗子１を処置具挿通チャンネルの先端開口部から所定の長さ突出させる。   Thus, despite the simple structure, it exhibits a high ability when collecting tissue cells. When inserting the forceps 1 into the treatment instrument insertion channel of the endoscope, the first bent portion 30a of the operation member 30 is retracted by pulling the operation member 30. As a result, the gripping claws 21 of the movable claw member 20 come into contact with the gripping claws 11, the gripping claws 11 and 21 are closed, and the forceps 1 smoothly advance in the treatment instrument insertion channel. Then, the forceps 1 are projected from the distal end opening of the treatment instrument insertion channel by a predetermined length.

鉗子１の先端部が体腔内に導出されると、操作部材３０を図３の状態から図６に矢印Ｆで示した方向に押動する。これによって、この操作部材３０に設けた第１の曲折部３０ａが先端側に移動することになり、その先端に連結した可動爪部材２０が押動されて、枢支ピン２４を中心として回動する。その結果、可動爪部材２０の把持爪２１と固定爪部材１０の把持部１１との間が開くことになる。   When the distal end portion of the forceps 1 is led out into the body cavity, the operation member 30 is pushed in the direction indicated by the arrow F in FIG. As a result, the first bent portion 30a provided on the operation member 30 moves toward the distal end, and the movable claw member 20 connected to the distal end is pushed to rotate around the pivot pin 24. To do. As a result, the gap between the grip claw 21 of the movable claw member 20 and the grip portion 11 of the fixed claw member 10 is opened.

そこで、体腔内壁のうち、摘出しようとする組織の部位に鉗子１の先端部を対面させるようにして、可撓性コード２を図６の矢印Ｐで示したように、処置具挿通チャンネルから押し出す方向に変位させる。把持爪１１の先端は鋭利な切刃部１１ａとなっているので、この切刃部１１ａが組織内に切り込まれることになる。把持爪１１は先端側が鋭利になっているが、基端側に向けて連続的に厚みが増しているので、その体腔内壁への切り込みが円滑に行われ、この把持爪１１が高い強度を有することになり、損傷することはない。ここで、可動爪部材２０は固定爪部材１０に対して概略直交する状態になっているので、把持爪１１による切り込み深さはこの可動爪部材２０が体腔内壁に当接する位置まで、つまり把持爪１１が突出している部位に限定される。従って、誤って体腔内壁の深い位置まで把持爪１１が差し込まれて、体内に対するダメージを与えるおそれはない。   Therefore, the flexible cord 2 is pushed out from the treatment instrument insertion channel as indicated by an arrow P in FIG. 6 so that the distal end portion of the forceps 1 faces a portion of the tissue cavity to be extracted on the inner wall of the body cavity. Displace in the direction. Since the tip of the gripping claw 11 has a sharp cutting edge 11a, the cutting edge 11a is cut into the tissue. The grip claw 11 has a sharp tip, but since the thickness continuously increases toward the base end, the cut into the inner wall of the body cavity is smoothly performed, and the grip claw 11 has high strength. It will not be damaged. Here, since the movable claw member 20 is substantially orthogonal to the fixed claw member 10, the depth of cut by the grasping claw 11 reaches the position where the movable claw member 20 contacts the inner wall of the body cavity, that is, the grasping claw. It is limited to the part which 11 protrudes. Accordingly, there is no possibility that the grasping nail 11 is inserted by mistake to a deep position on the inner wall of the body cavity and damages the body.

このようにして把持爪１１が体腔内に切り込まれ、可動爪２０が体腔内壁に対面する状態となったときに、操作部材３０を矢印Ｂ方向に引っ張って可撓性コード２内に引き込むように操作する。その結果、可動爪部材２０は枢支ピン２４を中心として、矢印Ｒ方向に回動することになる。ここで、可動爪部材２０の把持爪２１はその全体が曲面形状となっているが、先端部には切り欠き部２１ａが設けられて、直線的な刃先が形成されているので、この可動爪部材２０の把持爪２１が円滑かつ確実に組織に食い込まれる。その結果、把持爪２１が回動して、体腔内壁に刺入されている固定爪部材１０の把持爪１１に当接することになる。これによって、所定量の組織が切断されて、把持爪１１，２１間に取り込まれる。従って、この把持爪１１，２１を閉じたままにして、可撓性コード２を引き抜くことによって、体内組織の採取が行なわれる。   In this way, when the gripping claw 11 is cut into the body cavity and the movable claw 20 faces the inner wall of the body cavity, the operating member 30 is pulled in the direction of the arrow B and pulled into the flexible cord 2. To operate. As a result, the movable claw member 20 rotates in the arrow R direction around the pivot pin 24. Here, the gripping claw 21 of the movable claw member 20 has a curved surface as a whole, but since the cutout portion 21a is provided at the tip and a linear blade edge is formed, this movable claw The grasping claw 21 of the member 20 is smoothly and reliably bitten into the tissue. As a result, the gripping claw 21 rotates and comes into contact with the gripping claw 11 of the fixed claw member 10 inserted in the body cavity inner wall. As a result, a predetermined amount of tissue is cut and taken between the grasping claws 11 and 21. Accordingly, the body tissue is collected by pulling out the flexible cord 2 while keeping the gripping claws 11 and 21 closed.

本発明の実施の一形態における鉗子の正面図である。It is a front view of the forceps in one embodiment of the present invention. 図１の平面図である。It is a top view of FIG. 図２のＸ−Ｘ断面図である。It is XX sectional drawing of FIG. 図１のＹ−Ｙ断面図である。It is YY sectional drawing of FIG. 本発明の実施の形態を示す鉗子の先端部分の分解図である。It is an exploded view of the front-end | tip part of the forceps which shows embodiment of this invention. 本発明の実施の形態を示す鉗子の作動説明図である。It is action | operation explanatory drawing of the forceps which shows embodiment of this invention.

符号の説明Explanation of symbols

１ 鉗子 ２ 可撓性コード
３ 作動部
１０ 固定爪部材 １１ 把持爪
１２ ボス部 １２ａ ピン挿通孔
１３ 連結部
２０ 可動爪部材 ２１ 把持爪
２２ 枢支部 ２３ 連結部
２４ 枢支ピン ２６ 止着孔
３０ 操作部材 ３０ａ 第１の曲折部
３０ｂ 第２の曲折部 ３０ｃ 第３の曲折部 DESCRIPTION OF SYMBOLS 1 Forceps 2 Flexible cord 3 Actuation part 10 Fixed claw member 11 Holding claw 12 Boss part 12a Pin insertion hole 13 Connection part 20 Movable claw member 21 Holding claw 22 Pivoting part 23 Connecting part 24 Pivoting pin 26 Fixing hole 30 Operation Member 30a First bent portion 30b Second bent portion 30c Third bent portion

Claims (4)

可撓性コードの先端に固定的に設けた固定爪部材と、この固定爪部材に対して開閉可能となった可動爪部材と、この可動爪部材を開閉駆動するための操作部材とを備え、
前記操作部材は、前記可撓性コード内に挿通され、前記可動爪部材にその先端を連結した曲げ方向に可撓性を有する線材から構成され、
前記操作部材には、その先端近傍には曲折部が設けられて、この曲折部から先端側が前記可動爪部材を開く方向に押動する可動爪開放駆動手段とする
構成としたことを特徴とする鉗子。 A fixed claw member fixedly provided at the distal end of the flexible cord, a movable claw member that can be opened and closed with respect to the fixed claw member, and an operation member for opening and closing the movable claw member,
The operation member is inserted from the flexible cord, and is composed of a wire material having flexibility in a bending direction in which the distal end is connected to the movable claw member,
The operation member is provided with a bent portion in the vicinity of the distal end thereof, and is configured to be a movable claw opening drive unit that pushes the movable claw member in a direction of opening the movable claw member from the bent portion. forceps. 前記可動爪部材は回動軸により前記固定爪部材に回動可能に連結されており、前記操作部材の前記可動爪部材への連結部は、前記回動軸の配設位置より基端側であって、その回動中心を含む軸線に対して回動方向前方に偏寄した位置となし、前記曲折部はこの連結位置から前記軸線と交差する方向に延在させる構成としたことを特徴とする請求項１記載の鉗子。 The movable claw member is pivotally connected to the fixed claw member by a pivot shaft, and the connecting portion of the operation member to the movable claw member is closer to the proximal side than the position where the pivot shaft is disposed. In addition, a position deviated forward in the rotation direction with respect to the axis including the rotation center, and the bent portion extends from the connection position in a direction intersecting the axis. The forceps according to claim 1. 前記可動爪部材は前記固定爪部材に対して概略直交する状態が最大開度となるように規制する構成としたことを特徴とする請求項２記載の鉗子。 The forceps according to claim 2, wherein the movable claw member is configured to regulate a state in which the movable claw member is substantially orthogonal to the fixed claw member to have a maximum opening degree. 前記固定爪部材の先端部には、体腔内壁に刺入可能な切刃部を設ける構成としたことを特徴とする請求項１記載の鉗子。 The forceps according to claim 1, wherein a cutting blade portion capable of being inserted into a body cavity inner wall is provided at a distal end portion of the fixed claw member.
JP2005139735A 2005-05-12 2005-05-12 Forceps Pending JP2006314519A (en)

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JP2009082467A (en) * 2007-09-28 2009-04-23 Hi-Lex Corporation Small forceps and small forceps system
JP2020503090A (en) * 2016-11-23 2020-01-30 ボストン サイエンティフィック サイムド，インコーポレイテッドＢｏｓｔｏｎ Ｓｃｉｅｎｔｉｆｉｃ Ｓｃｉｍｅｄ，Ｉｎｃ． Biopsy device
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