JP2008017876A - Medical treatment instrument - Google Patents

Medical treatment instrument Download PDF

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JP2008017876A
JP2008017876A JP2006189675A JP2006189675A JP2008017876A JP 2008017876 A JP2008017876 A JP 2008017876A JP 2006189675 A JP2006189675 A JP 2006189675A JP 2006189675 A JP2006189675 A JP 2006189675A JP 2008017876 A JP2008017876 A JP 2008017876A
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connecting rod
movement
lever member
tip
medical treatment
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Tetsuya Araki
哲也 荒木
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical treatment instrument in which an acting part at its distal end can be swung and a clamping piece can surely opened and closed. <P>SOLUTION: The acting part 13 at the distal end of the medical treatment instrument is freely turnably attached. A shaft part is provided with a connecting rod 25 for transmitting the movement of a holding handle to the distal end part and connecting rods 26a and 26b for transmitting the movement of a dial to the distal end part. The movement of the connecting rod 25 is converted to the movement of opening and closing the clamping piece by a first motion converting mechanism comprising a slit plate 71 with a slit 72, a lever member 75 and a lever member 60. The movement of the connecting rods 26a and 26b is converted to the movement of the swing of the acting part 13 by a second motion converting mechanism comprising rack parts 86a and 86b at the distal ends of the connecting rods 26a and 26b, pinion gears 84a and 84b engaged with the rack parts 86a and 86b and gear parts 58a and 58b extended from a cylindrical part 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、患部の組織の把持、切断に用いられる医療用処置具に関するもので、特に、先端を首振り可能にしたものに関する。   The present invention relates to a medical treatment instrument used for grasping and cutting a tissue of an affected area, and particularly relates to a medical device in which a tip can be swung.

手術時に患部の組織を把持したり、切断したりするのに、鉗子と呼ばれる医療用処置具が使用されている。従来のこのような医療用処置具は、シャフトの先端に挟持片が配設され、把持ハンドルの操作により、挟持片が開閉され、この挟持片により、患部の組織の把持や切断が行われる。   A medical treatment tool called forceps is used to grasp or cut the affected tissue during surgery. In such a conventional medical treatment instrument, a holding piece is disposed at the tip of the shaft, and the holding piece is opened and closed by operating a holding handle, and the tissue of the affected part is held or cut by this holding piece.

しかしながら、このような従来の医療用処置具では、その先端の角度が固定されているため、患者の体内に確保したトンネル状の通路に医療用処置具の先端を挿入して手術を行うような場合に、通路の周辺の広がりを持って処置することが困難である。   However, since the angle of the tip of such a conventional medical treatment tool is fixed, the operation is performed by inserting the tip of the medical treatment tool into a tunnel-shaped passage secured in the patient's body. In some cases, it is difficult to treat the spread around the passage.

そこで、例えば、特許文献１に示されるように、複数の短管を継手を介して連結して、先端を首振り可能とした医療用処置具が提案されている。
特開２００６−１０２０９３号公報 Thus, for example, as shown in Patent Document 1, a medical treatment instrument has been proposed in which a plurality of short pipes are connected via a joint so that the tip can be swung.
JP 2006-102093 A

このように、先端を首振り可能にした医療用処置具では、先端の角度を簡単に調整できるようにすると共に、先端の角度がどのようになっていても、把持ハンドルの操作により、挟持片をスムーズに開閉できるようにする必要がある。   As described above, in the medical treatment instrument having the tip swingable, the angle of the tip can be easily adjusted, and the gripping handle can be operated by operating the grip handle regardless of the angle of the tip. Need to be able to open and close smoothly.

把持ハンドルの操作により挟持片を開閉させる機構としては、把持ハンドルにより連接棒を前後に動かし、この連接棒に連動して、挟持片を開閉させるようにすることが考えられる。ところが、連接棒を介して挟持片に伝えるような構成では、先端の角度の変化にフレキシブルに対応することが難しい。   As a mechanism for opening and closing the holding piece by operating the grip handle, it is conceivable that the connecting rod is moved back and forth by the holding handle and the holding piece is opened and closed in conjunction with the connecting rod. However, it is difficult to respond flexibly to changes in the angle of the tip in a configuration in which it is transmitted to the holding piece via the connecting rod.

そこで、先端の角度にフレキシブルに対応できる伝達機構として、把持ハンドルの動きをワイヤー等で伝達して挟持片を開閉するようにした構成が考えられる。しかしながら、ワイヤーを用いた機構では、ガタツキが生じる可能性がある。   Therefore, as a transmission mechanism that can flexibly cope with the angle of the tip, a configuration in which the movement of the grip handle is transmitted by a wire or the like to open and close the clamping piece is conceivable. However, the mechanism using the wire may cause rattling.

また、特許文献１に示したように、複数の短管を継手を介して連結した構成では、２本のワイヤーにより、先端部を屈曲させるようにしている。このような構成では、首振り機構にガタツキが生じやすい。   Moreover, as shown in Patent Document 1, in the configuration in which a plurality of short pipes are connected via a joint, the tip portion is bent by two wires. With such a configuration, the swing mechanism is likely to be rattled.

本発明は、上述の課題を鑑み、先端を首振り可能にすると共に、挟持片を確実に開閉できるようにした医療用処置具を提供することを目的とする。   In view of the above-described problems, an object of the present invention is to provide a medical treatment instrument that can swing the tip and can reliably open and close the clamping piece.

上述の課題を解決するために、本発明は、一対の挟持片が配設され、回動自在に取り付けられた作用部と、挟持片の開閉操作を行う把持ハンドルと、作用部と基体とを連結するシャフト部と、作用部の首振り操作を行う首振り操作部と、把持ハンドルの動きに応じて移動し、把持ハンドルの動きをシャフト部の先端部に伝える第１の連接棒と、首振り操作部の動きに応じて移動し、首振り操作部の動きをシャフト部の先端部に伝える第２の連接棒と、第１の連接棒の動きを挟持片の開閉の動きに変換する第１の運動変換機構と、第２の連接棒の動きを作用部の揺動の動きに変換する第２の運動変換機構とを備えるようにしたことを特徴とする。   In order to solve the above-described problem, the present invention includes a working portion provided with a pair of sandwiching pieces and rotatably attached thereto, a grip handle for opening and closing the sandwiching piece, and a working portion and a base. A connecting shaft portion, a swing operation portion for swinging the action portion, a first connecting rod that moves in accordance with the movement of the grip handle and transmits the motion of the grip handle to the tip portion of the shaft portion, and the neck A second connecting rod that moves according to the movement of the swing operation portion and transmits the movement of the swing operation portion to the tip of the shaft portion, and a first connecting rod that converts the movement of the first connecting rod into an opening / closing motion of the clamping piece. 1 motion converting mechanism and a second motion converting mechanism for converting the motion of the second connecting rod into the swing motion of the action portion.

好ましくは、第１の運動変換機構は、第１の連接棒の先端に設けられ、斜め方向のスリットを有するスリット板と、一端がスリット板のスリットに係合され、他端が第２のてこ部材の一端に連結された第１のてこ部材と、一端が前記第１のてこ部材の他端に連結され、他端が挟持片の一端に連結された第２のてこ部材とからなるようにしたことを特徴とする。   Preferably, the first motion conversion mechanism is provided at the tip of the first connecting rod, and has a slit plate having an oblique slit, one end engaged with the slit of the slit plate, and the other end of the second lever. A first lever member connected to one end of the member, and a second lever member having one end connected to the other end of the first lever member and the other end connected to one end of the holding piece. It is characterized by that.

好ましくは、第１のてこ部材と、第２のてこ部材とを球状のジョイントで連結するようにしたことを特徴とする。   Preferably, the first lever member and the second lever member are connected by a spherical joint.

好ましくは、第２の変換機構は、第２の連接棒の先端に設けられたラックと、ラックと歯合されたピニオンギアと、作用部から延出され、ピニオンギアと歯合されたギア部とからなるようにしたことを特徴とする。   Preferably, the second conversion mechanism includes a rack provided at the tip of the second connecting rod, a pinion gear meshed with the rack, and a gear portion meshed with the pinion gear extending from the action portion. It is characterized by comprising

好ましくは、更に、首振り操作部の動きに応じて、第２の連接棒と相対する方向に前後に移動する第３の連接棒と、第３の連接棒の先端に設けられた第２のラックと、第２の連接棒と相対する方向から、第２のラックと歯合された第２のピニオンギアと、作用部から延出され、第２のピニオンギアと歯合された第２のギア部とを設けるようにしたことを特徴とする。   Preferably, a third connecting rod that moves back and forth in a direction opposite to the second connecting rod according to the movement of the swing operation portion, and a second connecting rod provided at the tip of the third connecting rod. A second pinion gear meshed with the second rack and a second gear meshed with the second pinion gear extended from the action portion from a direction opposite to the rack and the second connecting rod A gear portion is provided.

本発明によれば、一対の挟持片が配設され、回動自在に取り付けられた作用部と、挟持片の開閉操作を行う把持ハンドルと、作用部と基体とを連結するシャフト部と、作用部の首振り操作を行う首振り操作部と、把持ハンドルの動きに応じて移動し、把持ハンドルの動きをシャフト部の先端部に伝える第１の連接棒と、首振り操作部の動きに応じて移動し、首振り操作部の動きをシャフト部の先端部に伝える第２の連接棒と、第１の連接棒の動きを挟持片の開閉の動きに変換する第１の運動変換機構と、第２の連接棒の動きを作用部の揺動の動きに変換する第２の運動変換機構とを備えるようにしているので、作用部を簡単に首振り動作できると共に、作用部の角度をどのようにした場合でも、把持ハンドルの操作により、挟持片を確実に開閉できる。   According to the present invention, a pair of sandwiching pieces are disposed and are pivotally attached to an action part, a grip handle for opening and closing the sandwiching piece, a shaft part connecting the action part and the base, and an action A swing operation unit that performs a swing operation of the head, a first connecting rod that moves according to the movement of the grip handle, and transmits the motion of the grip handle to the distal end of the shaft portion, and a motion according to the motion of the swing control unit A second connecting rod that transmits the movement of the swing operation portion to the tip of the shaft portion, and a first motion conversion mechanism that converts the movement of the first connecting rod into the opening and closing movement of the clamping piece, Since the second movement conversion mechanism that converts the movement of the second connecting rod into the swinging movement of the action portion is provided, the action portion can be easily swung, and the angle of the action portion can be changed. Even in this case, the gripping piece can be opened reliably by operating the grip handle. It can be.

また、本発明によれば、第１の運動変換機構は、第１の連接棒の先端に設けられ、斜め方向のスリットを有するスリット板と、一端がスリット板のスリットに係合され、他端が第２のてこ部材の一端に連結された第１のてこ部材と、一端が前記第１のてこ部材の他端に連結され、他端が挟持片の一端に連結された第２のてこ部材とからなるようにしている。このような構成では、挟持片には、揺動の力のみが加わり、前後方向等の無駄な力を受けることがない。このため、挟持片を、ガタツキが生じることなく、確実に開閉させることができる。また、作用部にも無駄な力が加われないので、作用部の回動部分にガタツキが生じることがない。   According to the present invention, the first motion conversion mechanism is provided at the tip of the first connecting rod, and has a slit plate having an oblique slit, one end engaged with the slit of the slit plate, and the other end. The first lever member is connected to one end of the second lever member, and the second lever member is connected to the other end of the first lever member and the other end is connected to one end of the holding piece. It is made up of. In such a configuration, only the swinging force is applied to the sandwiching piece, and no unnecessary force such as the front-rear direction is received. For this reason, the clamping piece can be reliably opened and closed without causing rattling. In addition, no wasteful force is applied to the action portion, so that the rotating portion of the action portion does not rattle.

また、本発明によれば、第１のてこ部材と、第２のてこ部材とを球状のジョイントで連結するようにしている。このため、作用部がどのような角度であっても、第１の連接棒の動きを挟持片に確実に伝えることができる。   Moreover, according to this invention, the 1st lever member and the 2nd lever member are connected with a spherical joint. For this reason, the movement of the first connecting rod can be reliably transmitted to the sandwiching piece regardless of the angle of the action portion.

また、本発明によれば、第２の変換機構は、第２の連接棒の先端に設けられたラックと、ラックと歯合されたピニオンギアと、作用部から延出され、ピニオンギアと歯合されたギア部とからなるようにしている。このように、ラック・アンド・ピニオンの機構により、作用部を回動させているため、スムーズで、確実に、作用部の首振り操作を行うことができる。   Further, according to the present invention, the second conversion mechanism includes a rack provided at the tip of the second connecting rod, a pinion gear meshed with the rack, an extension from the action portion, and the pinion gear and the tooth. It is made up of a combined gear part. Thus, since the action part is rotated by the rack and pinion mechanism, the swinging operation of the action part can be performed smoothly and reliably.

また、本発明によれば、更に、首振り操作部の動きに応じて、第２の連接棒と相対する方向に前後に移動する第３の連接棒と、第３の連接棒の先端に設けられた第２のラックと、第２の連接棒と相対する方向から、第２のラックと歯合された第２のピニオンギアと、作用部から延出され、第２のピニオンギアと歯合された第２のギア部とを設けるようにしている。このように、２本の連接棒を使って、作用部の首振りを行っているので、作用部の首振りの動きがスムーズで、確実になる。   Further, according to the present invention, a third connecting rod that moves back and forth in a direction opposite to the second connecting rod according to the movement of the swing operation portion, and a tip of the third connecting rod are provided. A second pinion gear engaged with the second rack, and a second pinion gear extending from the operating portion, in a direction opposite to the second connecting rod and the second connecting rod. The second gear portion is provided. In this way, since the action portion is swung using the two connecting rods, the movement of the action portion is smooth and reliable.

第１実施形態．
以下、本発明の実施の形態について図面を参照しながら説明する。図１は、本発明の第１実施形態の医療用処置具１の全体構成を示す斜視図である。この医療用処置具１は、例えばステンレス鋼等の金属から形成されている。 First embodiment.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of the medical treatment tool 1 according to the first embodiment of the present invention. The medical treatment instrument 1 is made of a metal such as stainless steel.

図１において、１１及び１２は把持ハンドル、１３は作用部、１４はシャフト部、１５は首振り操作部としてのダイアル部である。   In FIG. 1, 11 and 12 are grip handles, 13 is an action part, 14 is a shaft part, and 15 is a dial part as a swing operation part.

把持ハンドル１１及び１２は、作用部１３に設けられた挟持片２１及び２２を開閉させるものである。把持ハンドル１１は、基体１０に回動自在に取り付けられる。把持ハンドル１２は、基体１０と一体的に形成されている。把持ハンドル１１及び１２には、組織の把持、切断を行う際に、手術者の指が挿入される指穴１６及び１７がそれぞれ設けられる。   The grip handles 11 and 12 open and close the clamping pieces 21 and 22 provided in the action unit 13. The grip handle 11 is rotatably attached to the base body 10. The grip handle 12 is formed integrally with the base body 10. The grasping handles 11 and 12 are respectively provided with finger holes 16 and 17 into which the operator's fingers are inserted when tissue is grasped and cut.

作用部１３には、挟持片２１及び２２が設けられる。挟持片２１及び２２は、組織を把持したり、切断したりする部分である。挟持片２１及び２２は、把持ハンドル１１及び１２の操作により、開閉される。挟持片２１及び２２の開閉機構については、後に詳述する。   The action part 13 is provided with sandwiching pieces 21 and 22. The sandwiching pieces 21 and 22 are parts for grasping or cutting the tissue. The sandwiching pieces 21 and 22 are opened and closed by operating the grip handles 11 and 12. The opening / closing mechanism of the holding pieces 21 and 22 will be described in detail later.

また、本発明の第１実施形態の医療用処置具１には、作用部１３がシャフト部１４の先端部１８に回動自在に取り付けられており、医療用処置具１の先端の作用部１３は、軸５７を中心に首振りができるようになっている。すなわち、ダイアル部１５を回転させると、これに伴って、作用部１３が揺動する。これにより、手術を行うのに最適な角度となるように、作用部１３の角度を調整することができる。作用部１３の首振り機構については、後に詳述する。   Further, in the medical treatment instrument 1 according to the first embodiment of the present invention, the action part 13 is rotatably attached to the distal end part 18 of the shaft part 14, and the action part 13 at the distal end of the medical treatment instrument 1. Can swing around the shaft 57. That is, when the dial portion 15 is rotated, the action portion 13 swings accordingly. Thereby, the angle of the action part 13 can be adjusted so that it may become an optimal angle for performing surgery. The swing mechanism of the action unit 13 will be described in detail later.

シャフト部１４は、基体１０と作用部１３とを連結している。シャフト部１４内には、図２に示すように、把持ハンドル１１の操作による動きをシャフト部１４の先端部１８に伝える連接棒２５と、ダイアル部１５の操作による動きをシャフト部１４の先端部１８に伝える連接棒２６ａ及び２６ｂが配設される。   The shaft portion 14 connects the base body 10 and the action portion 13. In the shaft portion 14, as shown in FIG. 2, a connecting rod 25 that transmits the movement caused by the operation of the grip handle 11 to the distal end portion 18 of the shaft portion 14, and the movement caused by the operation of the dial portion 15, Connecting rods 26a and 26b are provided for transmission to 18.

図２に示すように、把持ハンドル１１は、ピン３１により、基体１０に回動自在に取り付けられる。把持ハンドル１１の先端と連接棒２５の一端とは、ピン３２により回動自在に連結される。したがって、把持ハンドル１１を回動させると、ピン３１を支点として、把持ハンドル１１の先端が揺動し、これに連結された連接棒２５が前後に移動する。連接棒２５が前後に移動すると、図１におけるシャフト部１４の先端部１８の内部にある第１の運動変換機構に連接棒２５の前後の動きが伝えられる。   As shown in FIG. 2, the grip handle 11 is rotatably attached to the base body 10 by a pin 31. The tip of the grip handle 11 and one end of the connecting rod 25 are connected to each other by a pin 32 so as to be freely rotatable. Therefore, when the grip handle 11 is rotated, the tip of the grip handle 11 is swung with the pin 31 as a fulcrum, and the connecting rod 25 connected thereto moves back and forth. When the connecting rod 25 moves back and forth, the back-and-forth movement of the connecting rod 25 is transmitted to the first motion conversion mechanism inside the tip portion 18 of the shaft portion 14 in FIG.

シャフト部１４の先端部１８及び作用部１３には、後に説明するように、連接棒２５の前後の動きを挟持片２１及び２２の開閉の動きに変換する第１の運動変換機構が設けられる。これにより、把持ハンドル１１の操作により、挟持片２１及び２２を開閉させることができる。   As will be described later, the distal end portion 18 and the action portion 13 of the shaft portion 14 are provided with a first motion conversion mechanism that converts the back-and-forth movement of the connecting rod 25 into the opening and closing movements of the sandwiching pieces 21 and 22. Thereby, the holding pieces 21 and 22 can be opened and closed by operating the grip handle 11.

また、ダイアル部１５を回転させると、図２における連接棒２６ａ及び２６ｂが逆方向に前後に移動する。つまり、図１に示すように、基体１０の背部には、溝１９が形成される。この溝１９内に、図２に示すように、平板状の連結部材３５ａ及び３５ｂが対向して配置される。連結部材３５ａ及び３５ｂには、ガイド溝３６ａ及び３７ａ、ガイド溝３６ｂ及び３７ｂがそれぞれ形成される。連結部材３５ａ及び３５ｂは、ガイド溝３６ａ及び３６ｂ、ガイド溝３７ａ及び３７ｂに沿って、直線的に移動する。   When the dial portion 15 is rotated, the connecting rods 26a and 26b in FIG. 2 move back and forth in the opposite direction. That is, as shown in FIG. 1, a groove 19 is formed in the back portion of the base 10. In this groove 19, as shown in FIG. 2, flat connecting members 35 a and 35 b are arranged to face each other. Guide grooves 36a and 37a and guide grooves 36b and 37b are formed in the connecting members 35a and 35b, respectively. The connecting members 35a and 35b move linearly along the guide grooves 36a and 36b and the guide grooves 37a and 37b.

ダイアル部１５の底面には、突起３８ａ及び３８ｂが形成される。ダイアル部１５が回転軸４０に取り付けられ、ダイアル部１５の突起３８ａ及び３８ｂが連結部材３５ａ及び３５ｂの一端の凹部３９ａ及び３９ｂにそれぞれ挿入される。また、ダイアル部１５には、セレーション４９が設けられている。基体１０には、スプリングにより付勢された突出部４２が設けられる。ダイアル部１５を回転軸４０に取り付けると、突出部４２の先端がセレーション４９に係合する。その結果、ダイアル部１５の回転は、セレーション４９の溝でノッチングされる。   On the bottom surface of the dial portion 15, protrusions 38a and 38b are formed. The dial part 15 is attached to the rotary shaft 40, and the protrusions 38a and 38b of the dial part 15 are inserted into the recesses 39a and 39b at one ends of the connecting members 35a and 35b, respectively. The dial portion 15 is provided with a serration 49. The base 10 is provided with a protrusion 42 biased by a spring. When the dial portion 15 is attached to the rotary shaft 40, the tip of the protruding portion 42 is engaged with the serration 49. As a result, the rotation of the dial portion 15 is notched by the groove of the serration 49.

連結部材３５ａ及び３５ｂの一端は、それぞれ、ピン４３ａ及び４３ｂにより、Ｌ字状てこ部材４４ａ及び４４ｂの一端に回動自在に連結される。Ｌ字状てこ部材４４ａ及び４４ｂの他端は、ピン４５により、基体１０に回動自在に取り付けられる。Ｌ字状てこ部材４４ａ及びＬ字状てこ部材４４ｂの中間部は、それぞれ、ピン４８ａ及び４８ｂにより、連接棒２６ａ及び２６ｂの一端に回動自在に連結される。   One ends of the connecting members 35a and 35b are rotatably connected to one ends of the L-shaped lever members 44a and 44b by pins 43a and 43b, respectively. The other ends of the L-shaped lever members 44 a and 44 b are rotatably attached to the base body 10 by pins 45. Intermediate portions of the L-shaped lever member 44a and the L-shaped lever member 44b are rotatably connected to one ends of the connecting rods 26a and 26b by pins 48a and 48b, respectively.

ダイアル部１５を回転させると、連結部材３５ａ及び３５ｂが互いに反対方向に直線的に移動する。連結部材３５ａ及び３５ｂが移動すると、Ｌ字状てこ部材４４ａ及び４４ｂはピン４５を支点として互いに反対方向に揺動する。Ｌ字状てこ部材４４ａ及び４４ｂの動きは、連接棒２６ａ及び２６ｂにそれぞれ伝えられ、Ｌ字状てこ部材４４ａ及び４４ｂが揺動すると、連接棒２６ａ及び２６ｂが互いに反対方向に前後に移動する。このように、ダイアル部１５を回転させると、連接棒２６ａ及び２６ｂが互いに反対方向に前後に移動する。   When the dial portion 15 is rotated, the connecting members 35a and 35b move linearly in opposite directions. When the connecting members 35a and 35b move, the L-shaped lever members 44a and 44b swing in opposite directions with the pin 45 as a fulcrum. The movements of the L-shaped lever members 44a and 44b are transmitted to the connecting rods 26a and 26b, respectively. When the L-shaped lever members 44a and 44b swing, the connecting rods 26a and 26b move back and forth in opposite directions. Thus, when the dial part 15 is rotated, the connecting rods 26a and 26b move back and forth in opposite directions.

連接棒２６ａ及び２６ｂの動きは、図１におけるシャフト部１４の先端部１８に伝えられる。シャフト部１４の先端部１８には、後に説明するように、連接棒２６ａ及び２６ｂの動きを、作用部１３を揺動させる動きに変換する第２の運動変換機構が設けられている。これにより、ダイアル部１５の回転操作により、作用部１３の首振り動作を行うことができる。   The movement of the connecting rods 26a and 26b is transmitted to the distal end portion 18 of the shaft portion 14 in FIG. As will be described later, the distal end portion 18 of the shaft portion 14 is provided with a second motion conversion mechanism that converts the movement of the connecting rods 26a and 26b into a motion that causes the action portion 13 to swing. Thereby, the swinging operation of the action part 13 can be performed by the rotation operation of the dial part 15.

このように、本発明の第１実施形態の医療用処置具１では、把持ハンドル１１及び１２を開閉操作し、挟持片２１及び２２を開閉させることで、患部の組織を把持したり、切断したりすることができる。そして、ダイアル部１５を回転させることで、作用部１３の首振り動作が可能となる。   As described above, in the medical treatment instrument 1 according to the first embodiment of the present invention, the grasping handles 11 and 12 are opened and closed, and the sandwiching pieces 21 and 22 are opened and closed to grasp or cut the affected tissue. Can be. Then, by rotating the dial portion 15, the action portion 13 can swing.

図３は、シャフト部１４の先端部１８及び作用部１３の構成を示す分解斜視図である。図３において、作用部１３は、円筒部５０と、挟持片２１及び２２とから構成される。挟持片２１は、円筒部５０と一体的に形成されている。挟持片２１には、挟持片２２の形状に対応した開口５１が形成されており、この開口５１を囲む周縁にブレードが形成されている。挟持片２２には、その周縁にブレードが形成されている。開口５１内に挟持片２２が配置され、円筒部５０の軸挿入口５２と、挟持片２２軸挿入口５３とに連通して、ピン５４が挿入され、円筒部５０に挟持片２２が回動自在に取り付けられる。   FIG. 3 is an exploded perspective view showing the configuration of the distal end portion 18 and the action portion 13 of the shaft portion 14. In FIG. 3, the action portion 13 includes a cylindrical portion 50 and sandwiching pieces 21 and 22. The clamping piece 21 is formed integrally with the cylindrical portion 50. An opening 51 corresponding to the shape of the sandwiching piece 22 is formed in the sandwiching piece 21, and a blade is formed around the periphery of the opening 51. A blade is formed on the periphery of the sandwiching piece 22. The holding piece 22 is disposed in the opening 51, communicates with the shaft insertion port 52 of the cylindrical portion 50 and the holding piece 22 shaft insertion port 53, the pin 54 is inserted, and the holding piece 22 rotates in the cylindrical portion 50. Can be attached freely.

円筒部５０の端面からは、突出片５６ａ及び５６ｂが延出される。この突出片５６ａ及び５６ｂの中心には、軸挿入口５７ａ及び５７ｂがそれぞれ形成される。また、突出片５６ａ及び５６ｂの周囲には、ギア５８ａ及び５８ｂが形成される。   Projecting pieces 56 a and 56 b extend from the end surface of the cylindrical portion 50. Shaft insertion ports 57a and 57b are formed at the centers of the protruding pieces 56a and 56b, respectively. Further, gears 58a and 58b are formed around the protruding pieces 56a and 56b.

円筒部５０内にてこ部材６０が配置され、円筒部５０の軸挿入口５９とてこ部材６０の軸挿入口６１とに連通して、ピン６２が挿入され、円筒部５０内にてこ部材６０が回動自在に取り付けられる。   A lever member 60 is disposed in the cylindrical portion 50, and a pin 62 is inserted in communication with the shaft insertion port 59 of the cylindrical portion 50 and the shaft insertion port 61 of the lever member 60. It can be pivotally attached.

てこ部材６０の一端には、Ｕ字形のジョイント部６３が形成され、てこ部材６０の他端には、球形のジョイント部６４が形成される。てこ部材６０の一端のＵ字形のジョイント部６３が挟持片２２のピン６５に係合され、てこ部材６０の一端と挟持片２２とが回動自在に連結される。   A U-shaped joint portion 63 is formed at one end of the lever member 60, and a spherical joint portion 64 is formed at the other end of the lever member 60. The U-shaped joint portion 63 at one end of the lever member 60 is engaged with the pin 65 of the holding piece 22, and the one end of the lever member 60 and the holding piece 22 are rotatably connected.

一方、シャフト部１４の先端部１８には、先端カバー７０が取り付けられる。連接棒２５、連接棒２６ａ及び２６ｂの先端は、先端カバー７０内に配置される。   On the other hand, a tip cover 70 is attached to the tip portion 18 of the shaft portion 14. The distal ends of the connecting rod 25 and the connecting rods 26 a and 26 b are disposed in the distal end cover 70.

連接棒２５の先端には、スリット板７１が設けられる。スリット板７１には、斜め方向にスリット７２が形成される。   A slit plate 71 is provided at the tip of the connecting rod 25. A slit 72 is formed in the slit plate 71 in an oblique direction.

先端カバー７０の側面に、軸挿入口８０が形成される。軸挿入口８０に、ピン７４が挿入され、このピン７４がてこ部材７５の軸挿入口７６に挿通され、てこ部材７５が先端カバー７０内に回動自在に取り付けられる。   A shaft insertion port 80 is formed on the side surface of the tip cover 70. A pin 74 is inserted into the shaft insertion port 80, the pin 74 is inserted through the shaft insertion port 76 of the lever member 75, and the lever member 75 is rotatably attached to the tip cover 70.

てこ部材７５の一端は、ガイドピン７７により、スリット７２内に摺動自在に係合される。てこ部材７５の他端には、球形のジョイントの受け側を構成するジョイント部７３が形成される。てこ部材７５の他端のジョイント部７３と、てこ部材６０の他端のジョイント部６４とが係合され、てこ部材７５とてこ部材６０とが自在に連結される。   One end of the lever member 75 is slidably engaged in the slit 72 by a guide pin 77. At the other end of the lever member 75, a joint portion 73 constituting the receiving side of the spherical joint is formed. The joint portion 73 at the other end of the lever member 75 and the joint portion 64 at the other end of the lever member 60 are engaged, and the lever member 75 and the lever member 60 are freely connected.

先端カバー７０の上面には、軸挿入口８１ａ及び８２ａが形成され、先端カバー７０の下面には、軸挿入口８１ｂ及び８２ｂが形成される。軸挿入口８１ａ及び８１ｂには、ピン８３ａ及び８３ｂがそれぞれ挿入され、このピン８３ａ及び８３ｂにより、ピニオンギア８４ａ及び８４ｂが先端カバー７０内に回転自在に取り付けられる。   Shaft insertion ports 81 a and 82 a are formed on the top surface of the tip cover 70, and shaft insertion ports 81 b and 82 b are formed on the bottom surface of the tip cover 70. Pins 83a and 83b are inserted into the shaft insertion ports 81a and 81b, respectively, and the pinion gears 84a and 84b are rotatably mounted in the tip cover 70 by the pins 83a and 83b.

軸挿入口８２ａ及び８２ｂ、軸挿入口５７ａ及び５７ｂに連通して、ピン８５ａ及び８５ｂがそれぞれ挿入され、このピン８５ａ及び８５ｂにより、先端カバー７０と、円筒部５０とが回動自在に取り付けられる。そして、ピニオンギア８４ａ及び８４ｂがギア部５８ａ及び５８ｂにそれぞれ歯合される。   Pins 85a and 85b are inserted into the shaft insertion ports 82a and 82b and the shaft insertion ports 57a and 57b, respectively, and the tip cover 70 and the cylindrical portion 50 are rotatably attached by the pins 85a and 85b. . Then, the pinion gears 84a and 84b are engaged with the gear portions 58a and 58b, respectively.

連接棒２６ａ及び２６ｂの先端には、ラック部８６ａ及び８６ｂが形成される。連接棒２６ａ及び２６ｂは、連接棒２５を挟んだ状態で互いに対応するように配置され、連接棒２６ａ及び２６ｂのラック部８６ａ及び８６ｂは、先端カバー７０を通過して、相対する方向から、ピニオンギア８４ａ及び８４ｂにそれぞれ歯合される。   Rack portions 86a and 86b are formed at the tips of the connecting rods 26a and 26b. The connecting rods 26a and 26b are arranged so as to correspond to each other with the connecting rod 25 sandwiched therebetween, and the rack portions 86a and 86b of the connecting rods 26a and 26b pass through the tip cover 70 and are pinned from opposite directions. The gears 84a and 84b are engaged with each other.

かかる構成からなる本発明の第１実施形態の医療用処置具１では、スリット７２を有するスリット板７１と、その一端がスリット７２に係合され、他端がてこ部材６０に連結されたてこ部材７５と、その一端が挟持片２２に連結され、その他端がてこ部材７５に連結されたてこ部材６０とにより、連接棒２５の前後の動きを挟持片２１及び２２の開閉の動きに変換する第１の運動変換機構が構成される。   In the medical treatment instrument 1 of the first embodiment of the present invention having such a configuration, the slit plate 71 having the slit 72 and the lever member having one end engaged with the slit 72 and the other end connected to the lever member 60. 75 and a lever member 60 having one end connected to the holding piece 22 and the other end connected to the lever member 75, the first and second movements of the connecting rod 25 are converted into opening and closing movements of the holding pieces 21 and 22. One motion conversion mechanism is configured.

図４及び図５は、挟持片２１及び２２の開閉機構を示すものである。図４は、挟持片２１及び２２を開いているときの状態を示し、図５は、挟持片２１及び２２を閉じているときの状態を示している。   4 and 5 show an opening / closing mechanism for the holding pieces 21 and 22. FIG. 4 shows a state when the holding pieces 21 and 22 are opened, and FIG. 5 shows a state when the holding pieces 21 and 22 are closed.

図４に示される第１の運動変換機構について以下に説明する。挟持片２１及び２２を開くときには、連接棒２５が矢印Ａ１１方向に移動される。連接棒２５が矢印Ａ１１方向に移動されると、スリット７２に沿ってガイドピン７７が矢印Ａ１２方向に移動し、これに伴っててこ部材７５の先端７３が矢印Ａ１３方向に回動し、てこ部材６０の先端のジョイント部６３が矢印Ａ１４方向に回動し、これに伴って挟持片２２が矢印Ａ１５の方向に回動する。これにより、図４に示すように、２２が開いた状態になる。   The first motion conversion mechanism shown in FIG. 4 will be described below. When opening the clamping pieces 21 and 22, the connecting rod 25 is moved in the direction of arrow A11. When the connecting rod 25 is moved in the direction of the arrow A11, the guide pin 77 is moved in the direction of the arrow A12 along the slit 72. Accordingly, the tip 73 of the lever member 75 is rotated in the direction of the arrow A13. The joint portion 63 at the tip of 60 rotates in the direction of arrow A14, and accordingly, the clamping piece 22 rotates in the direction of arrow A15. Thereby, as shown in FIG. 4, 22 will be in the open state.

これに対して、図５に示すように、連接棒２５を矢印Ａ２１方向に移動させると、スリット７２に沿ってガイドピン７７が矢印Ａ２２方向に移動し、これに伴っててこ部材７５の先端７３が矢印Ａ２３に方向に回動し、てこ部材６０の先端のジョイント部６３が矢印Ａ２４方向に回動し、これに伴って挟持片２２が矢印Ａ２５方向に回動する。これにより、図５に示すように、２２が閉じた状態になる。   On the other hand, as shown in FIG. 5, when the connecting rod 25 is moved in the direction of arrow A21, the guide pin 77 moves in the direction of arrow A22 along the slit 72, and accordingly, the tip 73 of the lever member 75 is moved. Rotates in the direction of arrow A23, the joint portion 63 at the tip of the lever member 60 rotates in the direction of arrow A24, and accordingly, the clamping piece 22 rotates in the direction of arrow A25. Thereby, as shown in FIG. 5, 22 will be in the closed state.

このように、本発明の第１実施形態の医療用処置具１では、連接棒２５の前後の動きを挟持片２２の開閉の動きに変換する第１の運動変換機構を、スリット７２を有するスリット板７１と、てこ部材７５、てこ部材６０とにより構成するようにしている。そして、てこ部材７５とてこ部材６０とは、球形のジョイント（球形ジョイント部６４、ジョイント部７３）で結合するようにしている。このため、作用部１３をどのような角度に揺動させても、挟持片２２を確実に開閉させることができる。   Thus, in the medical treatment instrument 1 according to the first embodiment of the present invention, the first motion conversion mechanism that converts the back-and-forth movement of the connecting rod 25 into the opening / closing movement of the clamping piece 22 is a slit having the slit 72. The plate 71, the lever member 75, and the lever member 60 are configured. The lever member 75 and the lever member 60 are coupled to each other by a spherical joint (a spherical joint portion 64 and a joint portion 73). For this reason, the clamping piece 22 can be reliably opened and closed regardless of the angle at which the action portion 13 is swung.

また、連接棒２５の前後の動きを、スリット板７１及びてこ部材７５により揺動運動に変換した後に、この揺動運動をてこ部材６０に伝え、挟持片２２に伝えている。この場合、挟持片２２には、てこ部材６０の揺動の力のみが加わり、無駄な力を受けることがない。このため、挟持片２２を、ガタツキが生じることなく、確実に開閉させることができる。また、作用部１３全体にも無駄な力が加われないので、作用部１３の回動部分にガタツキが生じることがない。   In addition, after the back and forth movement of the connecting rod 25 is converted into a swinging motion by the slit plate 71 and the lever member 75, this swinging motion is transmitted to the lever member 60 and transmitted to the holding piece 22. In this case, only the swinging force of the lever member 60 is applied to the sandwiching piece 22, and no unnecessary force is received. For this reason, the clamping piece 22 can be reliably opened and closed without generating rattling. Further, since no useless force is applied to the entire action portion 13, the rotating portion of the action portion 13 is not rattled.

また、本発明の第１実施形態の医療用処置具１では、連接棒２６ａ及び２６ｂの先端のラック部８６ａ及び８６ｂと、ラック部８６ａ及び８６ｂに歯合するピニオンギア８４ａ及び８４ｂと、円筒部５０から延出しているギア部５８ａ及び５８ｂとにより、連接棒２６ａ及び２６ｂの動きを作用部１３を揺動させる動きに変換する第２の運動変換機構が構成される。   In the medical treatment instrument 1 according to the first embodiment of the present invention, the rack portions 86a and 86b at the tips of the connecting rods 26a and 26b, the pinion gears 84a and 84b that mesh with the rack portions 86a and 86b, and the cylindrical portion The gear portions 58 a and 58 b extending from 50 constitute a second motion conversion mechanism that converts the movement of the connecting rods 26 a and 26 b into a motion that swings the action portion 13.

つまり、図６に示すように、連接棒２６ａを矢印Ｂ１１方向に移動させると、連接棒２６ａのラック部８６ａと歯合されているピニオンギア８４ａが矢印Ｂ１２方向に回転する。ピニオンギア８４ａが矢印Ｂ１２方向に回転されると、この回転がギア部５８ａに伝えられ、ギア部５８ａが矢印Ｂ１３方向に回転し、作用部１３が矢印Ｂ１４方向に回動する。このとき、連接棒２６ｂは連接棒２６ａと反対方向の矢印Ｂ２１方向に移動される。連接棒２６ａ及び２６ｂは、相対する方向からピニオンギア８４ａ及び８４ｂに歯合されているため、連接棒２６ｂを矢印Ｂ２１方向に移動させると、図示されないピニオンギア８４ｂは、ピニオンギア８４ａと同一方向の矢印Ｂ１２方向に回転される。この回転がギア部５８ｂに伝えられ、作用部１３が矢印Ｂ１４方向に回動する。   That is, as shown in FIG. 6, when the connecting rod 26a is moved in the arrow B11 direction, the pinion gear 84a meshed with the rack portion 86a of the connecting rod 26a rotates in the arrow B12 direction. When the pinion gear 84a is rotated in the arrow B12 direction, this rotation is transmitted to the gear portion 58a, the gear portion 58a rotates in the arrow B13 direction, and the action portion 13 rotates in the arrow B14 direction. At this time, the connecting rod 26b is moved in the direction of arrow B21 opposite to the connecting rod 26a. Since the connecting rods 26a and 26b are engaged with the pinion gears 84a and 84b from opposite directions, when the connecting rod 26b is moved in the direction of the arrow B21, the pinion gear 84b (not shown) has the same direction as the pinion gear 84a. It is rotated in the direction of arrow B12. This rotation is transmitted to the gear part 58b, and the action part 13 rotates in the arrow B14 direction.

このように、本発明の第１実施形態の医療用処置具１では、連接棒２６ａ及び２６ｂの前後の動きを作用部１３の揺動の動きに変換する第２の運動変換機構を、連接棒２６ａ及び２６ｂの先端のラック部８６ａ及び８６ｂと、ラック部８６ａ及び８６ｂに歯合するピニオンギア８４ａ及び８４ｂと、円筒部５０から延出しているギア部５８ａ及び５８ｂとにより構成するようにしている。このように、ラック・アンド・ピニオンの機構により、作用部１３を回動させているため、作用部１３の角度を、スムーズに、確実に調整することができる。   As described above, in the medical treatment instrument 1 according to the first embodiment of the present invention, the second motion conversion mechanism that converts the back-and-forth movement of the connecting rods 26a and 26b into the swinging motion of the action portion 13 is provided with the connecting rod. 26a and 26b, rack portions 86a and 86b, pinion gears 84a and 84b meshing with the rack portions 86a and 86b, and gear portions 58a and 58b extending from the cylindrical portion 50. . Thus, since the action part 13 is rotated by the rack and pinion mechanism, the angle of the action part 13 can be adjusted smoothly and reliably.

第２実施形態．
図７は、本発明の第２実施形態のシャフト部１４の先端部１８及び作用部１３の構成を示す分解斜視図である。 Second embodiment.
FIG. 7 is an exploded perspective view showing configurations of the distal end portion 18 and the action portion 13 of the shaft portion 14 according to the second embodiment of the present invention.

前述の第１実施形態では、連接棒２６ａ及び２６ｂの前後の動きを作用部１３の揺動の動きに変換する第２の運動変換機構を、連接棒２６ａ及び２６ｂと、連接棒２６ａ及び２６ｂの先端のラック部８６ａ及び８６ｂと、ラック部８６ａ及び８６ｂに歯合するピニオンギア８４ａ及び８４ｂと、円筒部５０から延出しているギア部５８ａ及び５８ｂとにより構成するようにしている。この第１実施形態の場合には、相対するように配設された２本の連接棒２６ａ及び２６ｂを使って、作用部１３の首振りを行っているので、作用部１３の首振りの動きがスムーズで、確実になるという利点がある。   In the first embodiment described above, the second motion conversion mechanism that converts the back-and-forth movement of the connecting rods 26a and 26b into the swinging motion of the action portion 13 is used as the connecting rods 26a and 26b and the connecting rods 26a and 26b. Rack portions 86a and 86b at the front end, pinion gears 84a and 84b meshing with the rack portions 86a and 86b, and gear portions 58a and 58b extending from the cylindrical portion 50 are configured. In the case of the first embodiment, the action part 13 is swung using the two connecting rods 26a and 26b arranged so as to face each other. Has the advantage of being smooth and reliable.

これに対して、この第２実施形態では、１本の連接棒２６ａと、連接棒２６ａの先端のラック部８６ａと、ラック部８６ａに歯合するピニオンギア８４ａと、円筒部５０から延出しているギア部５８ａとにより構成するようにしている。このように、この実施形態では、１本の連接棒２６ａで、作用部１３の首振りを行うことができ、器具の小型化を図ることができる。他の構成については、前述の第１実施形態と同様であり、その説明は、省略する。   In contrast, in the second embodiment, one connecting rod 26a, the rack portion 86a at the tip of the connecting rod 26a, the pinion gear 84a meshing with the rack portion 86a, and the cylindrical portion 50 are extended. The gear portion 58a is configured. Thus, in this embodiment, the action part 13 can be swung with one connecting rod 26a, and the size of the instrument can be reduced. About another structure, it is the same as that of the above-mentioned 1st Embodiment, The description is abbreviate | omitted.

本発明は、上述した実施形態に限定されるものではなく、この発明の要旨を逸脱しない範囲内で様々な変形や応用が可能である。   The present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the gist of the present invention.

本発明は、鉗子のように、患部の組織の把持、切断に用いられる医療用処置具として用いることができる。   The present invention can be used as a medical treatment tool used for grasping and cutting tissue in an affected area, such as forceps.

本発明の第１実施形態の医療用処置具の全体構成を示す斜視図である。It is a perspective view showing the whole medical treatment instrument composition of a 1st embodiment of the present invention. 本発明の第１実施形態の医療用処置具における連接棒の移動機構の説明に用いる斜視図である。It is a perspective view used for description of the movement mechanism of the connecting rod in the medical treatment tool of the first embodiment of the present invention. 本発明の第１実施形態のシャフト部の先端及び作用部の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the front-end | tip of a shaft part of 1st Embodiment of this invention, and an action part. 挟持片の開閉機構の説明図である。It is explanatory drawing of the opening / closing mechanism of a clamping piece. 挟持片の開閉機構を説明図である。It is explanatory drawing of the opening / closing mechanism of a clamping piece. 作用部の首振り機構の説明図である。It is explanatory drawing of the swing mechanism of an action part. 本発明の第２実施形態のシャフト部の先端部及び作用部の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the front-end | tip part of a shaft part of 2nd Embodiment of this invention, and an action part.

符号の説明Explanation of symbols

１ 医療用処置具
１０ 基体
１１、１２ 把持ハンドル
１３ 作用部
１４ シャフト部
１５ ダイアル部
１６，１７ 指穴
１８ 先端部
１９ 溝
２１，２２ 挟持片
２５ 連接棒
２６ａ，２６ｂ 連接棒
３５ａ，３５ｂ 連結部材
３６ａ，３６ｂ，３７ａ，３７ｂ ガイド溝
３８ａ，３８ｂ 突起
３９ａ，３９ｂ 凹部
４０ 回転軸
４２ 突出部
４４ａ，４４ｂ Ｌ字状てこ部材
４９ セレーション
５０ 円筒部
５１ 開口
５６ａ，５６ｂ 突出片
５８ａ，５８ｂ ギア部
６０ てこ部材
６３ Ｕ字形のジョイント部
６４ 球形ジョイント部
６５ ピン
７０ 先端カバー
７１ スリット板
７２ スリット
７３ ジョイント部
７５ てこ部材
７６ 軸挿入口
７７ ガイドピン
８０ 軸挿入口
８４ａ，８４ｂ ピニオンギア
８６ａ，８６ｂ ラック部
DESCRIPTION OF SYMBOLS 1 Medical treatment tool 10 Base | substrate 11, 12 Grasp handle 13 Action part 14 Shaft part 15 Dial part 16, 17 Finger hole 18 Tip part 19 Grooves 21, 22 Nipping piece 25 Connecting rod 26a, 26b Connecting rod 35a, 35b Connecting member 36a , 36b, 37a, 37b Guide grooves 38a, 38b Protrusion 39a, 39b Recess 40 Rotating shaft 42 Protruding part 44a, 44b L-shaped lever member 49 Serration 50 Cylindrical part 51 Opening 56a, 56b Protruding piece 58a, 58b Gear part 60 63 U-shaped joint portion 64 Spherical joint portion 65 Pin 70 Tip cover 71 Slit plate 72 Slit 73 Joint portion 75 Lever member 76 Shaft insertion port 77 Guide pin 80 Shaft insertion port 84a, 84b Pinion gears 86a, 86b Rack portion

Claims (5)

一対の挟持片が配設され、回動自在に取り付けられた作用部と、
前記挟持片の開閉操作を行う把持ハンドルと、
前記作用部と基体とを連結するシャフト部と、
前記作用部の首振り操作を行う首振り操作部と、
前記把持ハンドルの動きに応じて移動し、前記把持ハンドルの動きを前記シャフト部の先端部に伝える第１の連接棒と、
前記首振り操作部の動きに応じて移動し、前記首振り操作部の動きを前記シャフト部の先端部に伝える第２の連接棒と、
前記第１の連接棒の動きを前記挟持片の開閉の動きに変換する第１の運動変換機構と、
前記第２の連接棒の動きを前記作用部の揺動の動きに変換する第２の運動変換機構と
を備えるようにしたことを特徴とする医療用処置具。 A pair of sandwiching pieces disposed and pivotally attached to the action part;
A grip handle for opening and closing the clamping piece;
A shaft portion connecting the working portion and the base body;
A swing operation section for performing a swing operation of the action section;
A first connecting rod that moves according to the movement of the grip handle and transmits the movement of the grip handle to the tip of the shaft portion;
A second connecting rod that moves according to the movement of the swing operation section and transmits the movement of the swing operation section to the tip of the shaft section;
A first motion conversion mechanism that converts the movement of the first connecting rod into the opening and closing movement of the clamping piece;
A medical treatment instrument comprising: a second motion conversion mechanism that converts a motion of the second connecting rod into a swing motion of the action portion. 前記第１の運動変換機構は、前記第１の連接棒の先端に設けられ、斜め方向のスリットを有するスリット板と、
一端が前記スリット板のスリットに係合され、他端が第２のてこ部材の一端に連結された第１のてこ部材と、
一端が前記第１のてこ部材の他端に連結され、他端が前記挟持片の一端に連結された第２のてこ部材と
からなるようにしたことを特徴とする請求項１に記載の医療用処置具。 The first motion conversion mechanism is provided at the tip of the first connecting rod, and has a slit plate having an oblique slit;
A first lever member having one end engaged with the slit of the slit plate and the other end coupled to one end of the second lever member;
2. The medical device according to claim 1, wherein one end is connected to the other end of the first lever member, and the other end is connected to the second lever member connected to one end of the holding piece. Treatment tool. 前記第１のてこ部材と、前記第２のてこ部材とを球状のジョイントで連結するようにしたことを特徴とする請求項１に記載の医療用処置具。   The medical treatment instrument according to claim 1, wherein the first lever member and the second lever member are connected by a spherical joint. 前記第２の変換機構は、前記第２の連接棒の先端に設けられたラックと、
前記ラックと歯合されたピニオンギアと、
前記作用部から延出され、前記第２のピニオンギアと歯合されたギア部と
からなるようにしたことを特徴とする請求項１に記載の医療用処置具。 The second conversion mechanism includes a rack provided at a tip of the second connecting rod;
A pinion gear meshed with the rack;
2. The medical treatment instrument according to claim 1, wherein the medical treatment tool includes a gear portion extending from the action portion and meshed with the second pinion gear. 更に、前記首振り操作部の動きに応じて、前記第２の連接棒と相対する方向に前後に移動する第３の連接棒と、
前記第３の連接棒の先端に設けられた第２のラックと、
前記第２の連接棒と相対する方向から、前記第２のラックと歯合された第２のピニオンギアと、
前記作用部から延出され、前記ピニオンギアと歯合された第２のギア部とを設ける
ようにしたことを特徴とする請求項４に記載の医療用処置具。
And a third connecting rod that moves back and forth in a direction opposite to the second connecting rod in accordance with the movement of the swing operation portion;
A second rack provided at the tip of the third connecting rod;
A second pinion gear meshed with the second rack from a direction opposite to the second connecting rod;
The medical treatment tool according to claim 4, wherein a second gear portion extending from the action portion and meshed with the pinion gear is provided.
JP2006189675A 2006-07-10 2006-07-10 Medical treatment instrument Pending JP2008017876A (en)

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