JP2009213731A - Treatment instrument for endoscope - Google Patents

Treatment instrument for endoscope Download PDF

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JP2009213731A
JP2009213731A JP2008061981A JP2008061981A JP2009213731A JP 2009213731 A JP2009213731 A JP 2009213731A JP 2008061981 A JP2008061981 A JP 2008061981A JP 2008061981 A JP2008061981 A JP 2008061981A JP 2009213731 A JP2009213731 A JP 2009213731A
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distal
distal end
treatment member
flexible sheath
cylindrical body
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Kenta Murayama
健太 村山
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Hoya Corp
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Hoya Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment instrument for an endoscope, capable of accurately restraining the projection and rotation of a distal-end treatment member by easy operation. <P>SOLUTION: A pair of notches 5a, opened toward the distal end side, are formed at 180° symmetrical positions in a part close to the distal end of a cylinder 5 disposed to move forward/backward in response to the forward/backward movement of the distal-end treatment member 2, and a cylinder aperture 8 to narrow the part close to the distal end of the cylinder when the cylinder 5 is moved forward is disposed in a distal end part 1a of a flexible sheath 1. As the part close to the distal end of the cylinder 5 is fitted into the cylinder aperture 8 from rear, the advancement of the cylinder 5 is blocked, and further forward projection of the distal-end treatment member 2 is restrained. At the same time, a rear half part 2b of the distal-end treatment member 2 is pressed and fixed inside the part close to the distal end of the cylinder 5 narrowed by the cylinder aperture 8, so that the rotation of the distal-end treatment member 2 in the axial direction is restrained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は内視鏡用処置具に関する。   The present invention relates to an endoscope treatment tool.

いわゆる内視鏡用高周波切開具等のように、内視鏡の処置具挿通チャンネルに通されて生体組織を高周波電流で切開する等の処置を行う内視鏡用処置具にあっては、高周波電極である先端処置部材が可撓性シースの先端から前方に突没自在に且つ可撓性シースの軸線周り方向に回転自在に配置されて、可撓性シース内に軸線方向に進退自在に挿通配置された操作ワイヤを基端側から進退操作することにより先端処置部材が可撓性シースの先端から突没し、操作ワイヤを基端側から軸線周り方向に回転操作することにより先端処置部材が可撓性シースの軸線周り方向に回転するように構成されたものが少なくない。   In the case of an endoscopic treatment instrument that performs a treatment such as incising a living tissue with a high-frequency current through a treatment instrument insertion channel of an endoscope, such as a so-called endoscopic high-frequency incision instrument. A tip treatment member, which is an electrode, is disposed so as to protrude forward and backward from the distal end of the flexible sheath and to be rotatable about the axis of the flexible sheath, and is inserted into the flexible sheath so as to advance and retract in the axial direction. The distal treatment member protrudes and retracts from the distal end of the flexible sheath by advancing and retracting the arranged operation wire from the proximal end side, and the distal treatment member is rotated by rotating the operation wire in the direction around the axis from the proximal end side. Many are configured to rotate around the axis of the flexible sheath.

ただし、切開処置を行う際に先端処置部材が振らつかないようにするために、先端処置部材が可撓性シースの先端から一定以上突出するのを規制するストッパと、先端処置部材が可撓性シースの先端から突出した状態の時に可撓性シースに対して軸線周り方向に相対的に回転するのを規制する回転規制機構とを設けることが望ましい（例えば、特許文献１）。
特開２００４−２６１３７２ However, in order to prevent the distal treatment member from shaking when performing the incision treatment, a stopper that restricts the distal treatment member from protruding from the distal end of the flexible sheath to a certain extent and the distal treatment member is flexible. It is desirable to provide a rotation restricting mechanism for restricting relative rotation in the direction around the axis with respect to the flexible sheath when protruding from the distal end of the sheath (for example, Patent Document 1).
JP2004-261372

特許文献１には、摩擦抵抗を利用して先端処置部材の回転規制を行うようにしたものや（図２等）、操作ワイヤの先端付近に設けられた突起が係合する多条溝を可撓性シースの先端内に配置された部材の内周部に軸線と平行方向に形成して回転規制を行うようにしたもの（図１０等）が記載されている。   Patent Document 1 allows the use of frictional resistance to restrict the rotation of the distal treatment member (FIG. 2 and the like) and the multi-slot groove that engages the protrusion provided near the distal end of the operation wire. There is described a member (FIG. 10 and the like) that is formed in the inner peripheral portion of the member disposed in the distal end of the flexible sheath in a direction parallel to the axis to restrict rotation.

しかし、特許文献１の図２等に記載されている摩擦抵抗を利用して回転規制を行うようにしたものは、操作ワイヤを一定以上の力で押し込み操作し続けないと先端処置部材が外力で回転する状態になってしまうので操作性が極めてよくない。   However, in the case where the rotation restriction is performed by using the frictional resistance described in FIG. 2 of Patent Document 1, the distal treatment member has an external force unless the operation wire is pushed in with a certain force or more. Since it will be in a rotating state, operability is not very good.

また、特許文献１の図１０等に記載されているように多条溝を可撓性シースの先端内に配置された部材に形成したものは、回転位置の規制が多条溝の溝位置でしか行えないので、所望通りの正確な向きに位置決めすることができない。   In addition, as described in FIG. 10 of Patent Document 1, etc., in which a multi-slot groove is formed on a member disposed in the distal end of the flexible sheath, the rotation position is regulated at the multi-slot groove position. Since it can only be done, it cannot be positioned in the exact orientation as desired.

本発明は、先端処置部材の突出規制と回転規制を容易な操作で正確に行うことができる内視鏡用処置具を提供することを目的とする。   It is an object of the present invention to provide an endoscopic treatment tool that can accurately control the protrusion and rotation of the distal treatment member with an easy operation.

上記の目的を達成するため、本発明の内視鏡用処置具は、可撓性シースの先端から前方に突没自在に且つ可撓性シースの軸線周り方向に回転自在に先端処置部材が配置されて、可撓性シース内に軸線方向に進退自在に挿通配置された操作ワイヤを基端側から進退操作することにより先端処置部材が可撓性シースの先端から突没し、操作ワイヤを基端側から軸線周り方向に回転操作することにより先端処置部材が可撓性シースの軸線周り方向に回転するように構成されると共に、先端処置部材が可撓性シースの先端から一定以上突出するのを規制するストッパと、先端処置部材が可撓性シースの先端から突出した状態の時に可撓性シースに対して軸線周り方向に相対的に回転するのを規制する回転規制機構とが設けられた内視鏡用処置具において、先端処置部材の前後方向への移動に対応して前後方向に移動するように設けられた筒体の先端寄りの部分に、先端側に開口する一対の切り欠きを１８０°対称位置に形成して、先端処置部材の後半部分を切り欠き部において筒体内に緩く嵌まる状態に配置すると共に、筒体が前方に移動した時にその先端寄りの部分を窄まらせる筒体絞り孔を可撓性シースの先端部分に設け、筒体の先端寄りの部分が筒体絞り孔内に後方から嵌まり込むことにより、筒体の前進が阻止されて先端処置部材のそれ以上の前方への突出が規制されると同時に、筒体絞り孔によって窄められた筒体の先端寄りの部分内に先端処置部材の後半部分が圧迫固定されて、先端処置部材の軸線周り方向への回転が規制されるようにしたものである。   In order to achieve the above object, the treatment instrument for an endoscope of the present invention has a distal treatment member disposed so as to be able to project forward and backward from the distal end of the flexible sheath and to be rotatable around the axis of the flexible sheath. The distal treatment member protrudes and retracts from the distal end of the flexible sheath by moving the manipulation wire inserted in the flexible sheath so as to be movable back and forth in the axial direction from the proximal end side. The distal treatment member is configured to rotate in the direction around the axis of the flexible sheath by rotating from the end side in the direction around the axis, and the tip treatment member protrudes from the distal end of the flexible sheath more than a certain amount. And a rotation restricting mechanism for restricting relative rotation in the direction around the axis relative to the flexible sheath when the distal treatment member protrudes from the distal end of the flexible sheath. In the treatment instrument for endoscope A pair of notches opened on the distal end side are formed at 180 ° symmetrical positions in a portion closer to the distal end of the cylindrical body provided to move in the front-rear direction corresponding to the movement of the distal treatment member in the front-rear direction. In addition, the rear end portion of the distal treatment member is disposed so as to be loosely fitted into the cylindrical body at the cutout portion, and the cylindrical throttle hole for constricting the portion near the distal end when the cylindrical body moves forward is flexible. Provided at the distal end portion of the sheath, and the portion closer to the distal end of the cylindrical body is fitted into the cylindrical throttle hole from the rear side, so that the forward movement of the cylindrical body is prevented and the distal treatment member protrudes further forward. At the same time, the latter half portion of the distal treatment member is pressed and fixed in the portion near the distal end of the cylindrical body that is narrowed by the cylindrical aperture, and the rotation of the distal treatment member in the direction around the axis is restricted. It is what I did.

なお、切り欠きが、先端側へ次第に幅が広がるＶ状に形成されていてもよい。   Note that the notch may be formed in a V shape that gradually increases in width toward the tip side.

本発明によれば、筒体の先端寄りの部分が筒体絞り孔内に後方から嵌まり込むことにより、筒体の前進が阻止されて先端処置部材のそれ以上の前方への突出が規制されると同時に、筒体絞り孔によって窄められた筒体の先端寄りの部分内に先端処置部材の後半部分が圧迫固定されて、先端処置部材の軸線周り方向への回転が規制されるようにしたことにより、先端処置部材が、可撓性シースの先端から最も突出した状態では、その直前に調整された通りの向きに正確に位置決め固定され、先端処置部材によるその後の処置を正しく容易に行うことができる。   According to the present invention, the portion closer to the distal end of the cylindrical body is fitted into the cylindrical throttle hole from the rear, whereby the forward movement of the cylindrical body is prevented and further forward protrusion of the distal treatment member is restricted. At the same time, the latter half portion of the distal treatment member is pressed and fixed in the portion of the cylindrical body that is narrowed by the cylindrical aperture, so that the rotation of the distal treatment member in the direction around the axis is restricted. As a result, in the state where the distal treatment member protrudes most from the distal end of the flexible sheath, the distal treatment member is accurately positioned and fixed in the direction adjusted just before it, and the subsequent treatment by the distal treatment member is performed correctly and easily. be able to.

可撓性シースの先端から前方に突没自在に且つ可撓性シースの軸線周り方向に回転自在に先端処置部材が配置されて、可撓性シース内に軸線方向に進退自在に挿通配置された操作ワイヤを基端側から進退操作することにより先端処置部材が可撓性シースの先端から突没し、操作ワイヤを基端側から軸線周り方向に回転操作することにより先端処置部材が可撓性シースの軸線周り方向に回転するように構成されると共に、先端処置部材が可撓性シースの先端から一定以上突出するのを規制するストッパと、先端処置部材が可撓性シースの先端から突出した状態の時に可撓性シースに対して軸線周り方向に相対的に回転するのを規制する回転規制機構とが設けられた内視鏡用処置具において、先端処置部材の前後方向への移動に対応して前後方向に移動するように設けられた筒体の先端寄りの部分に、先端側に開口する一対の切り欠きを１８０°対称位置に形成して、先端処置部材の後半部分を切り欠き部において筒体内に緩く嵌まる状態に配置すると共に、筒体が前方に移動した時にその先端寄りの部分を窄まらせる筒体絞り孔を可撓性シースの先端部分に設け、筒体の先端寄りの部分が筒体絞り孔内に後方から嵌まり込むことにより、筒体の前進が阻止されて先端処置部材のそれ以上の前方への突出が規制されると同時に、筒体絞り孔によって窄められた筒体の先端寄りの部分内に先端処置部材の後半部分が圧迫固定されて、先端処置部材の軸線周り方向への回転が規制されるようにする。   The distal treatment member is disposed so as to be able to project forward and backward from the distal end of the flexible sheath and to be rotatable in the direction around the axis of the flexible sheath, and is inserted into the flexible sheath so as to be movable forward and backward in the axial direction. The distal treatment member protrudes and retracts from the distal end of the flexible sheath by operating the operation wire forward and backward from the proximal end side, and the distal treatment member is flexible by rotating the operation wire from the proximal end side in the direction around the axis. The stopper is configured to rotate around the axis of the sheath, the stopper for restricting the distal treatment member from projecting from the distal end of the flexible sheath to a certain extent, and the distal treatment member projects from the distal end of the flexible sheath. In the endoscope treatment tool provided with a rotation restricting mechanism for restricting relative rotation in the direction around the axis with respect to the flexible sheath in the state, the distal treatment member can be moved in the front-rear direction. Forward and backward A pair of notches that open to the distal end side are formed at a 180 ° symmetrical position in the portion near the distal end of the cylindrical body provided to move, and the latter half of the distal treatment member is loosened into the cylindrical body at the notched portion. A cylindrical throttle hole is provided in the distal end portion of the flexible sheath so that when the cylindrical body moves forward, the portion close to the distal end of the cylindrical body is narrowed. By fitting into the body throttle hole from the rear, the cylinder is prevented from moving forward, and further forward protrusion of the tip treatment member is restricted, and at the same time, the cylinder narrowed by the cylinder throttle hole The second half of the distal treatment member is pressed and fixed in the portion near the distal end of the distal end of the distal treatment member so that the rotation of the distal treatment member in the direction around the axis is restricted.

以下、図面を参照して本発明の実施例を説明する。
図４、図５及び図６は内視鏡用処置具の先端部分の側面断面図、平面断面図、及び正面図であり、この実施例では内視鏡用高周波切開具に本発明が適用されている。 Embodiments of the present invention will be described below with reference to the drawings.
4, 5 and 6 are a side sectional view, a plan sectional view, and a front view of the distal end portion of the endoscope treatment tool. In this embodiment, the present invention is applied to a high-frequency cutting instrument for an endoscope. ing.

図示されていない内視鏡の処置具挿通チャンネルに挿脱される可撓性シース１は、四フッ化エチレン樹脂チューブ等のような電気絶縁性の可撓性チューブで形成されており、例えば直径が２ｍｍ程度で長さが１〜２ｍ程度のものである。   A flexible sheath 1 that is inserted into and removed from a treatment instrument insertion channel of an endoscope (not shown) is formed of an electrically insulating flexible tube such as a tetrafluoroethylene resin tube. Is about 2 mm in length and about 1-2 m in length.

可撓性シース１の先端には略円筒状の硬質の先端口金１ａが可撓性シース１と軸線位置を合わせて固定的に取り付けられている。そして、先端が側方に折れ曲がったフック状に形成された導電金属製の先端処置部材２が、先端口金１ａの先端から前方に突没自在に且つ先端口金１ａの軸線周り方向に回転自在に配置されている。   A substantially cylindrical hard distal end cap 1 a is fixedly attached to the distal end of the flexible sheath 1 with the axial position aligned with the flexible sheath 1. A conductive metal tip treatment member 2 formed in a hook shape with the tip bent sideways is disposed so as to be able to project forward and backward from the tip of the tip cap 1a and to rotate around the axis of the tip cap 1a. Has been.

可撓性シース１内には、導電金属製の操作ワイヤ３が軸線方向に進退自在に且つ軸線周り方向に回転自在に挿通配置されており、可撓性シース１の基端側に連結された操作部（図示せず）において、操作ワイヤ３の基端を可撓性シース１に対して相対的に進退操作及び回転操作することができる。   An operation wire 3 made of a conductive metal is inserted in the flexible sheath 1 so as to be movable forward and backward in the axial direction and rotatable in the direction around the axial line, and is connected to the proximal end side of the flexible sheath 1. In the operation portion (not shown), the proximal end of the operation wire 3 can be moved forward and backward and rotated relative to the flexible sheath 1.

そのような先端処置部材２の後端と操作ワイヤ３の先端とは接続パイプ４を介して連結されている。具体的には、先端処置部材２の後端尾部２ａと操作ワイヤ３の最先端部分とが接続パイプ４に前側からと後側から各々差し込まれて、銀ロー付け等で一体的に固着されている。   The rear end of such a front treatment member 2 and the front end of the operation wire 3 are connected via a connection pipe 4. Specifically, the rear end tail portion 2a of the distal treatment member 2 and the most distal portion of the operation wire 3 are respectively inserted into the connection pipe 4 from the front side and the rear side, and are integrally fixed by silver brazing or the like. Yes.

その結果、操作ワイヤ３を基端側から進退操作することにより先端処置部材２を可撓性シース１の先端口金１ａの先端から突没させ、操作ワイヤ３を基端側から軸線周り方向に回転操作することにより先端処置部材２を可撓性シース１の軸線周り方向に回転させることができる。   As a result, the distal end treatment member 2 is projected and retracted from the distal end of the distal end cap 1a of the flexible sheath 1 by moving the operation wire 3 forward and backward from the proximal end side, and the operation wire 3 is rotated in the direction around the axis from the proximal end side. By operating, the distal treatment member 2 can be rotated around the axis of the flexible sheath 1.

そのような先端処置部材２と操作ワイヤ３との連結接続部には、全体として略円筒状の筒体５が緩く被嵌されている。筒体５は、可撓性シース１内から先端口金１ａ内にまたがる状態に配置されていて、その後端部には、接続パイプ４の後端面（図において右側の端面）に当接する後端口金６が固着されている。なお、筒体５を先端側の外径がやや先細りのテーパ筒状に形成してもよい。   A generally cylindrical body 5 is loosely fitted as a whole to such a connecting and connecting portion between the distal treatment member 2 and the operation wire 3. The cylindrical body 5 is disposed so as to straddle the flexible sheath 1 and the distal end cap 1a, and a rear end cap that abuts the rear end surface (the right end surface in the drawing) of the connection pipe 4 at the rear end portion. 6 is fixed. The cylindrical body 5 may be formed in a tapered cylindrical shape having a slightly tapered outer diameter on the distal end side.

操作ワイヤ３には、後端口金６の後端面に当接する駆動パイプ７が後端口金６からやや間隔を開けた位置に固着されている。その結果、操作ワイヤ３が軸線方向に進退操作されると、前進（即ち、図において左方への移動）の際には後端口金６が駆動パイプ７で押される。   A drive pipe 7 that contacts the rear end face of the rear end cap 6 is fixed to the operation wire 3 at a position slightly spaced from the rear end cap 6. As a result, when the operation wire 3 is operated to advance and retract in the axial direction, the rear end cap 6 is pushed by the drive pipe 7 when moving forward (that is, moving leftward in the figure).

また、後退の際には後端口金６が接続パイプ４で押され、後端口金６が操作ワイヤ３の動きよりやや遅れて軸線方向に進退する。その結果、後端口金６と共動する筒体５が、操作ワイヤ３と共動する先端処置部材２の前後方向の移動に対応して前後方向に移動する。   Further, at the time of retreat, the rear end cap 6 is pushed by the connection pipe 4, and the rear end cap 6 moves back and forth in the axial direction with a slight delay from the movement of the operation wire 3. As a result, the cylindrical body 5 that moves together with the rear end cap 6 moves in the front-rear direction corresponding to the movement in the front-rear direction of the distal treatment member 2 that moves together with the operation wire 3.

図７に分解して示されるように、筒体５の先端寄りの部分（例えば、筒体５の先側の半部）には、先端側に開口する一対の切り欠き５ａが１８０°対称位置に形成されている。この実施例では、各切り欠き５ａが先端側へ次第に幅が広がるＶ状に形成されている。ただし、切り欠き５ａが平行溝状等であっても差し支えない。   As shown in an exploded view in FIG. 7, a pair of notches 5 a that open to the distal end side are positioned 180 ° symmetrically at a portion closer to the distal end of the tubular body 5 (for example, the front half of the tubular body 5). Is formed. In this embodiment, each notch 5a is formed in a V-shape that gradually increases in width toward the tip side. However, the notch 5a may have a parallel groove shape or the like.

そして、先端処置部材２の後半部分が筒体５内の切り欠き５ａの部分内に緩く嵌まる状態に配置されている。また、全体として略一定厚に形成されている先端処置部材２には、切り欠き５ａの部分内に位置するように突起部２ｂが左右両面に突出形成されている。   Then, the rear half portion of the distal treatment member 2 is disposed so as to be loosely fitted into the notch 5 a in the cylindrical body 5. Further, the distal treatment member 2 formed with a substantially constant thickness as a whole is provided with protruding portions 2b projecting on both the left and right sides so as to be located within the notch 5a.

なお、図６は内視鏡用処置具の先端部分の正面図であるが、筒体５の内周面と先端処置部材２の突起部２ｂとの間に隙間がある状態を把握し易いように、筒体５と先端処置部材２の突起部２ｂとに斜線と砂目を付してある。   FIG. 6 is a front view of the distal end portion of the endoscope treatment tool, so that it is easy to grasp a state where there is a gap between the inner peripheral surface of the cylindrical body 5 and the protruding portion 2b of the distal treatment member 2. Further, the cylindrical body 5 and the protrusion 2b of the distal treatment member 2 are hatched and grained.

図４と図５に戻って、可撓性シース１の先端口金１ａの内周部の中間位置には、筒体５の先端寄りの部分が嵌まり込む筒体絞り孔８が形成されている。筒体絞り孔８の径は筒体５の外径よりやや小さく形成されていて、筒体絞り孔８の後端壁面部は後方から前方に向かって次第に窄まったテーパ孔状に形成されている。その結果、筒体５が前方に移動すると、筒体５の先端寄りの部分が、筒体絞り孔８内に次第に嵌まり込んで窄められた状態になっていく。   Returning to FIGS. 4 and 5, a cylindrical throttle hole 8 into which a portion closer to the distal end of the cylindrical body 5 is fitted is formed at an intermediate position of the inner peripheral portion of the distal end cap 1 a of the flexible sheath 1. . The diameter of the cylindrical throttle hole 8 is formed to be slightly smaller than the outer diameter of the cylindrical body 5, and the rear end wall surface portion of the cylindrical throttle hole 8 is formed in a tapered hole shape gradually narrowing from the rear toward the front. Yes. As a result, when the cylindrical body 5 moves forward, the portion near the tip of the cylindrical body 5 is gradually fitted into the cylindrical throttle hole 8 and becomes constricted.

このような構成により、操作ワイヤ３が基端側に牽引された状態では、図４及び図５に示されるように、先端処置部材２が可撓性シース１の先端口金１ａ内に引き込まれており、操作ワイヤ３が基端側から先端側に向かって押し込み操作されると、先端処置部材２が可撓性シース１の先端口金１ａから前方に押し出されて突出して行く。   With such a configuration, when the operation wire 3 is pulled toward the proximal end side, the distal treatment member 2 is drawn into the distal end cap 1a of the flexible sheath 1 as shown in FIGS. When the operation wire 3 is pushed from the proximal end side toward the distal end side, the distal treatment member 2 is pushed forward from the distal end cap 1a of the flexible sheath 1 and protrudes.

その途中で、操作ワイヤ３が軸線周り方向に回転操作されるとそれに追従して先端処置部材２が可撓性シース１の軸線周り方向に回転する。したがって、先端処置部材２の向きを切開処置に都合のよい所望の向きに調整することができる。   On the way, when the operation wire 3 is rotated in the direction around the axis, the distal treatment member 2 rotates in the direction around the axis of the flexible sheath 1 following the rotation. Therefore, the direction of the distal treatment member 2 can be adjusted to a desired direction convenient for the incision treatment.

そして、さらに操作ワイヤ３が先端側に向かって押し込み操作されると、それに伴って前方に移動させられる筒体５の先端寄りの部分が筒体絞り孔８内を通過して次第に窄まり、図１及び図２に示されるように、筒体５の先端寄りの部分がある程度窄まった位置に達すると、筒体５がそれ以上前進できない状態になる。   When the operation wire 3 is further pushed toward the distal end side, the portion closer to the distal end of the cylindrical body 5 that is moved forward along with the operation wire 3 passes through the cylindrical aperture 8 and gradually narrows. As shown in FIG. 1 and FIG. 2, when the portion near the tip of the cylindrical body 5 reaches a position where it is narrowed to some extent, the cylindrical body 5 is in a state where it cannot advance any further.

このようにして、先端処置部材２が可撓性シース１の（先端口金１ａの）先端から一定以上突出するのを規制するストッパが、筒体５と筒体絞り孔８との係合部で構成されている。   In this way, the stopper that restricts the distal treatment member 2 from protruding from the distal end (of the distal end cap 1 a) of the flexible sheath 1 more than a certain amount is the engaging portion between the tubular body 5 and the tubular body aperture 8. It is configured.

また、そのようにして先端処置部材２が可撓性シース１から最も突出した状態になった時は、正面図である図３に示されるように、筒体５の先端寄りの部分が筒体絞り孔８で窄められることにより、先端処置部材２の後半部分に形成された突起部２ｂが筒体５により圧迫固定され、先端処置部材２が可撓性シース１に対して軸線周り方向に相対的に回転できないように回転規制された状態になっている。   In addition, when the distal treatment member 2 is in the most protruded state from the flexible sheath 1 in this way, as shown in FIG. 3 which is a front view, the portion closer to the distal end of the tubular body 5 is the tubular body. By being narrowed by the restriction hole 8, the protrusion 2 b formed in the latter half of the distal treatment member 2 is pressed and fixed by the cylindrical body 5, and the distal treatment member 2 is axially rotated with respect to the flexible sheath 1. The rotation is restricted so that it cannot rotate relatively.

したがって、先端処置部材２は、可撓性シース１の先端から最も突出した状態の時に、その直前に調整された通りの切開処置に都合のよい向き（可撓性シース１に対する軸線周り方向の向き）に正確に固定され、切開処置を正しく容易に行うことができる。   Therefore, when the distal treatment member 2 is in the state of being most protruded from the distal end of the flexible sheath 1, the distal treatment member 2 is oriented in the direction convenient for the incision treatment as just adjusted (the orientation in the direction around the axis with respect to the flexible sheath 1). Incision procedure can be performed correctly and easily.

なお、本発明は上記実施例に限定されるものではなく、例えば、高周波電流を使用しない各種の内視鏡用処置具に本発明を適用してもよい。   In addition, this invention is not limited to the said Example, For example, you may apply this invention to the various treatment tools for endoscopes which do not use a high frequency current.

本発明の実施例の内視鏡用処置具において先端処置部材が前方に突出した状態の先端部分の側面断面図である。It is side surface sectional drawing of the front-end | tip part of the state which the front-end | tip treatment member protruded ahead in the treatment tool for endoscopes of the Example of this invention. 本発明の実施例の内視鏡用処置具において先端処置部材が前方に突出した状態の先端部分の平面断面図である。It is a plane sectional view of the tip part in the state where the tip treatment member protrudes ahead in the endoscope treatment tool of the example of the present invention. 本発明の実施例の内視鏡用処置具において先端処置部材が前方に突出した状態の先端部分の正面図である。It is a front view of the tip part in the state where the tip treatment member protrudes ahead in the treatment instrument for endoscopes of the example of the present invention. 本発明の実施例の内視鏡用処置具において先端処置部材が可撓性シース内に退避した状態の先端部分の側面断面図である。It is side surface sectional drawing of the front-end | tip part state in the state which the front-end | tip treatment member evacuated in the flexible sheath in the treatment tool for endoscopes of the Example of this invention. 本発明の実施例の内視鏡用処置具において先端処置部材が可撓性シース内に退避した状態の先端部分の平面断面図である。It is a plane sectional view of the tip part in the state where the tip treatment member was retracted in the flexible sheath in the endoscope treatment tool of the embodiment of the present invention. 本発明の実施例の内視鏡用処置具において先端処置部材が可撓性シース内に退避した状態の先端部分の正面図である。FIG. 6 is a front view of the distal end portion of the endoscope treatment tool according to the embodiment of the present invention in a state where the distal treatment member is retracted into the flexible sheath. 本発明の実施例の内視鏡用処置具の部分分解斜視図である。It is a partial exploded perspective view of the treatment tool for endoscopes of the example of the present invention.

符号の説明Explanation of symbols

１ 可撓性シース
１ａ 先端口金（可撓性シースの先端部分）
２ 先端処置部材
３ 操作ワイヤ
５ 筒体
５ａ 切り欠き
６ 後端口金
７ 駆動パイプ
８ 筒体絞り孔 DESCRIPTION OF SYMBOLS 1 Flexible sheath 1a Tip cap (tip part of flexible sheath)
2 End treatment member 3 Operation wire 5 Cylindrical body 5a Notch 6 Rear end cap 7 Drive pipe 8 Cylindrical throttle hole

Claims (2)

可撓性シースの先端から前方に突没自在に且つ上記可撓性シースの軸線周り方向に回転自在に先端処置部材が配置されて、上記可撓性シース内に軸線方向に進退自在に挿通配置された操作ワイヤを基端側から進退操作することにより上記先端処置部材が上記可撓性シースの先端から突没し、上記操作ワイヤを基端側から軸線周り方向に回転操作することにより上記先端処置部材が上記可撓性シースの軸線周り方向に回転するように構成されると共に、上記先端処置部材が上記可撓性シースの先端から一定以上突出するのを規制するストッパと、上記先端処置部材が上記可撓性シースの先端から突出した状態の時に上記可撓性シースに対して軸線周り方向に相対的に回転するのを規制する回転規制機構とが設けられた内視鏡用処置具において、
上記先端処置部材の前後方向への移動に対応して前後方向に移動するように設けられた筒体の先端寄りの部分に、先端側に開口する一対の切り欠きを１８０°対称位置に形成して、上記先端処置部材の後半部分を上記切り欠き部において上記筒体内に緩く嵌まる状態に配置すると共に、上記筒体が前方に移動した時にその先端寄りの部分を窄まらせる筒体絞り孔を上記可撓性シースの先端部分に設け、上記筒体の先端寄りの部分が上記筒体絞り孔内に後方から嵌まり込むことにより、上記筒体の前進が阻止されて上記先端処置部材のそれ以上の前方への突出が規制されると同時に、上記筒体絞り孔によって窄められた上記筒体の先端寄りの部分内に上記先端処置部材の後半部分が圧迫固定されて、上記先端処置部材の軸線周り方向への回転が規制されるようにしたことを特徴とする内視鏡用処置具。 A distal treatment member is disposed so as to protrude and retract forward from the distal end of the flexible sheath and to be rotatable about the axis of the flexible sheath, and is inserted into the flexible sheath so as to advance and retract in the axial direction. The distal treatment member projects and retracts from the distal end of the flexible sheath by advancing and retracting the operated wire from the proximal end side, and the distal end by rotating the operation wire in the direction around the axis from the proximal end side. A treatment member is configured to rotate in a direction around the axis of the flexible sheath, and a stopper for restricting the distal treatment member from protruding from the distal end of the flexible sheath to a certain extent, and the distal treatment member An endoscopic treatment instrument provided with a rotation restricting mechanism for restricting relative rotation in the direction around the axis with respect to the flexible sheath when the arm is protruding from the distal end of the flexible sheath. ,
A pair of notches opened on the distal end side are formed at 180 ° symmetrical positions in a portion near the distal end of the cylindrical body provided to move in the front / rear direction corresponding to the movement of the distal treatment member in the front / rear direction. And a cylindrical diaphragm for squeezing a portion near the tip when the cylindrical body moves forward while the latter half of the distal treatment member is disposed in a state of loosely fitting in the cylindrical body at the notch. A hole is provided in the distal end portion of the flexible sheath, and the portion closer to the distal end of the cylindrical body is fitted into the cylindrical body throttle hole from the rear, so that the advancement of the cylindrical body is prevented and the distal treatment member Further forward protrusion of the tube is restricted, and at the same time, the latter half portion of the distal treatment member is compressed and fixed in a portion near the distal end of the cylindrical body that is narrowed by the cylindrical throttle hole, and the distal end The rotation of the treatment member in the direction around the axis is Endoscopic treatment tool characterized in that so as to be braking. 上記切り欠きが、先端側へ次第に幅が広がるＶ状に形成されている請求項１記載の内視鏡用処置具。   The endoscopic treatment tool according to claim 1, wherein the notch is formed in a V shape that gradually increases in width toward the distal end side.
JP2008061981A 2008-03-12 2008-03-12 Treatment instrument for endoscope Pending JP2009213731A (en)

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