JP2008289762A

JP2008289762A - Frontward-projecting treatment instrument for endoscope

Info

Publication number: JP2008289762A
Application number: JP2007139975A
Authority: JP
Inventors: Masayasu Sato; 雅康佐藤
Original assignee: Hoya Corp
Current assignee: Hoya Corp
Priority date: 2007-05-28
Filing date: 2007-05-28
Publication date: 2008-12-04

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frontward-projecting treatment instrument for endoscopes retaining a distal treatment member in a maximally projecting state without any need of an assistant when performing a treatment, and retaining the distal treatment member in a maximally retracted state without any need of the assistant when inserting/removing it relative to a treatment instrument insertion channel of an endoscope. <P>SOLUTION: This frontward-projecting treatment instrument is provided with an energization means 7 for energizing the distal treatment member 3 in the direction of projecting frontward from the distal end of a flexible sheath 1, and an operation member locking means 16 freely locking and unlocking a sliding member 14 relative to an operation part body 11 in a state where the distal treatment member 3 is drawn to the distal side of the flexible sheath 1 against the energization of the energization means 7. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、内視鏡の処置具挿通チャンネルに通して使用される内視鏡用前方突出型処置具に関する。 The present invention relates to an endoscope front-projection type treatment instrument that is used through a treatment instrument insertion channel of an endoscope.

内視鏡の処置具には、可撓性シースの先端部分に配置された先端処置部材が遠隔操作によって嘴状に開閉動作するもの、膨縮動作するもの、或いは前後に進退動作するもの等があるが、本発明は、そのうちの進退動作をする内視鏡用前方突出型処置具に係るものである。 Endoscopic treatment tools include those in which the distal treatment member disposed at the distal end portion of the flexible sheath is opened and closed like a hook by remote control, inflated or retracted, or moved forward and backward. However, the present invention relates to a forward-projecting treatment instrument for an endoscope that moves forward and backward.

そのような内視鏡用前方突出型処置具は一般に、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の先端部分に配置された先端処置部材が、可撓性シース内に挿通された操作ワイヤを可撓性シースの基端に連結された操作部において軸線方向に進退操作することにより、可撓性シースの先端から前方に突出して軸線方向に進退動作するように構成されている（例えば、特許文献１）。
特開２００４−３１３５３７ Such a front-projection type treatment instrument for an endoscope generally has a distal treatment member disposed at the distal end portion of the flexible sheath inserted into and removed from the treatment instrument insertion channel of the endoscope in the flexible sheath. The inserted operation wire is configured to move forward and backward in the axial direction by projecting forward and backward from the distal end of the flexible sheath by operating in the axial direction at the operation portion connected to the proximal end of the flexible sheath. (For example, Patent Document 1).
JP2004-313537

上述のような内視鏡用前方突出型処置具を使用する場合には、例えば高周波電流を通電しながら先端処置部材を可撓性シースの先端から最も前方に突出させ、術者はその状態を保って内視鏡の手元側で可撓性シースを摘んで前後に進退操作したり内視鏡の湾曲操作を行ったりする。 In the case of using the endoscope front-projection type treatment tool as described above, for example, the distal treatment member is projected forward from the distal end of the flexible sheath while applying a high-frequency current, and the surgeon Hold the flexible sheath on the proximal side of the endoscope and move it back and forth or perform bending operation of the endoscope.

ただし、そのような動作の最中に、先端処置部材が体内組織に当接することにより可撓性シース内に押し込まれて引っ込んでしまうことがある。そこで、先端処置部材が可撓性シースの先端から最大限に突出した状態を保つように、補助者が操作ワイヤを手元側から押し込み続ける必要があり、常時二人がかりの手間のかかる作業になってしまう。 However, during such an operation, the distal treatment member may be pushed into the flexible sheath and retracted due to contact with the body tissue. Therefore, it is necessary for the assistant to keep pushing the operation wire from the proximal side so that the distal treatment member protrudes from the distal end of the flexible sheath to the maximum extent, which is a time-consuming work for two people. End up.

そのような不都合を解消するためには、先端処置部材を可撓性シースの先端から前方に突出する方向に付勢するばねを設ければよいと考えられる。しかし、単にそのような構成を採ると、処置具を内視鏡の処置具挿通チャンネルに挿脱する際にも先端処置部材が可撓性シースの先端から最大限に突出した状態になっているので、先端処置部材が破損したり、逆に先端処置部材で処置具挿通チャンネルの内面を傷つけたりするおそれがある。 In order to eliminate such an inconvenience, it is considered that a spring for urging the distal treatment member in a direction protruding forward from the distal end of the flexible sheath may be provided. However, simply adopting such a configuration, the distal treatment member protrudes to the maximum from the distal end of the flexible sheath even when the treatment instrument is inserted into and removed from the treatment instrument insertion channel of the endoscope. Therefore, there is a possibility that the distal treatment member may be damaged, or conversely, the inner surface of the treatment instrument insertion channel may be damaged by the distal treatment member.

本発明は、処置を行う際に補助者を要することなく先端処置部材が最大限に突出した状態を保つことができ、しかも、内視鏡の処置具挿通チャンネルに挿脱する際にも補助者を要することなく先端処置部材を最も退避した状態に保つことができる内視鏡用前方突出型処置具を提供することを目的とする。 The present invention can maintain a state in which the distal treatment member protrudes to the maximum without requiring an assistant when performing a procedure, and also assists when inserting / removing into / from a treatment instrument insertion channel of an endoscope. It is an object of the present invention to provide an endoscope front-projection type treatment instrument that can keep the distal treatment member in the most retracted state without requiring a large amount of treatment.

上記の目的を達成するため、本発明の内視鏡用前方突出型処置具は、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の先端部分に配置された先端処置部材が、可撓性シース内に挿通された可撓性の操作ワイヤを可撓性シースの基端に連結された操作部において軸線方向に進退操作することにより、可撓性シースの先端から前方に突出する状態に進退するように構成された内視鏡用前方突出型処置具であって、操作部には、可撓性シースの基端に連結された操作部本体と、操作ワイヤの基端に連結されて操作部本体に対しスライド自在に係合するスライド操作部材とが設けられた内視鏡用前方突出型処置具において、先端処置部材を可撓性シースの先端から前方に突出する方向に付勢する付勢手段を設けると共に、先端処置部材が付勢手段の付勢力に抗して可撓性シースの先端側に引き寄せられた状態において、スライド操作部材を操作部本体に対し係止及び係止解除自在な操作部材ロック手段を設けたものである。 In order to achieve the above-described object, the front-projection type treatment instrument for an endoscope of the present invention includes a distal treatment member disposed at a distal end portion of a flexible sheath that is inserted into and removed from the treatment instrument insertion channel of the endoscope. The flexible operation wire inserted into the flexible sheath is moved forward and backward in the axial direction at the operation portion connected to the proximal end of the flexible sheath, thereby protruding forward from the distal end of the flexible sheath. An endoscope forward-projecting treatment instrument configured to advance and retreat to a state in which the operation unit includes an operation unit body connected to a proximal end of a flexible sheath, and a proximal end of an operation wire. In the endoscope front-projection type treatment instrument provided with a slide operation member that is connected and slidably engages with the operation unit main body, the distal treatment member protrudes forward from the distal end of the flexible sheath. A biasing means for biasing is provided and a tip treatment member is In a state of being attracted to the distal end side of the flexible sheath against the biasing force of the means it is provided with a locking and unlocking freely operating member locking means slide operation member with respect to the operation portion main body.

なお、付勢手段がシースの先端部分に内蔵されていてもよく、スライド操作部材には、操作ワイヤの基端に連結された板状部材と、その板状部材に連結された指掛け部材とが設けられて、操作部本体には、板状部材がスライド自在に係合するスリットが形成されると共に、操作部材ロック手段として、板状部材が操作ワイヤの軸線周りに回転されることにより係合する切り欠きが、スリットを挟む位置の壁部に形成されていてもよい。そのスリットは、操作部本体の丸棒状部分に軸線方向に真っ直ぐに形成されていて、その丸棒状部分が、指掛け部材に貫通形成された孔内に緩く嵌合していてもよい。 The biasing means may be built in the distal end portion of the sheath, and the slide operation member includes a plate-like member connected to the proximal end of the operation wire and a finger hooking member connected to the plate-like member. The operating portion body is provided with a slit in which the plate-like member is slidably engaged, and as the operation member lock means, the plate-like member is engaged by being rotated around the axis of the operation wire. The notch to be formed may be formed in a wall portion at a position sandwiching the slit. The slit may be formed straight in the axial direction in the round bar-shaped portion of the operation unit main body, and the round bar-shaped portion may be loosely fitted in a hole formed through the finger-hanging member.

また、切り欠きの先端側壁面が垂直壁であってもよく、その先端側壁面と板状部材とに、互いにクリック係合する凹部と凸部が形成されていてもよい。また、切り欠きの先端側壁面が切り欠きの開口部側から奥側へ次第に後退する斜面状に形成されていてもよく、その先端側壁面に階段状の段差が形成されていてもよい。 Moreover, the front end side wall surface of the notch may be a vertical wall, and the front end side wall surface and the plate-like member may be formed with a concave portion and a convex portion that are click-engaged with each other. Moreover, the front end side wall surface of the notch may be formed in a slope shape gradually retreating from the opening side of the notch to the back side, and a stepped step may be formed on the front end side wall surface.

本発明によれば、先端処置部材を可撓性シースの先端から前方に突出する方向に付勢する付勢手段を設けたことにより、処置を行う際に補助者を要することなく先端処置部材が最大限に突出した状態を保つことができ、さらに、先端処置部材が付勢手段の付勢力に抗して可撓性シースの先端側に引き寄せられた状態において、スライド操作部材を操作部本体に対し係止及び係止解除自在な操作部材ロック手段を設けたことにより、内視鏡の処置具挿通チャンネルに挿脱する際にも補助者を要することなく先端処置部材を最も退避した状態に保って、先端処置部材や処置具挿通チャンネルの損傷を防止することができる。 According to the present invention, by providing the biasing means for biasing the distal treatment member in a direction protruding forward from the distal end of the flexible sheath, the distal treatment member can be used without requiring an assistant when performing the treatment. The slide operation member can be kept on the operation portion main body in a state in which the distal treatment member is pulled toward the distal end side of the flexible sheath against the urging force of the urging means. By providing an operation member locking means that can be locked and unlocked, the distal treatment member is kept in the most retracted state without requiring an assistant when inserting into and removing from the treatment instrument insertion channel of the endoscope. Thus, damage to the distal treatment member and the treatment instrument insertion channel can be prevented.

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の先端部分に配置された先端処置部材が、可撓性シース内に挿通された可撓性の操作ワイヤを可撓性シースの基端に連結された操作部において軸線方向に進退操作することにより、可撓性シースの先端から前方に突出する状態に進退するように構成された内視鏡用前方突出型処置具であって、操作部には、可撓性シースの基端に連結された操作部本体と、操作ワイヤの基端に連結されて操作部本体に対しスライド自在に係合するスライド操作部材とが設けられた内視鏡用前方突出型処置具において、先端処置部材を可撓性シースの先端から前方に突出する方向に付勢する付勢手段を設けると共に、先端処置部材が付勢手段の付勢力に抗して可撓性シースの先端側に引き寄せられた状態において、スライド操作部材を操作部本体に対し係止及び係止解除自在な操作部材ロック手段を設ける。 The distal treatment member disposed at the distal end portion of the flexible sheath that is inserted into and removed from the treatment instrument insertion channel of the endoscope transmits the flexible operation wire inserted into the flexible sheath to the flexible sheath. An endoscope front-projection type treatment instrument configured to advance and retract in a state of projecting forward from the distal end of a flexible sheath by performing an advance / retreat operation in an axial direction at an operation unit coupled to a proximal end. The operation portion is provided with an operation portion main body connected to the proximal end of the flexible sheath, and a slide operation member connected to the proximal end of the operation wire and slidably engaged with the operation portion main body. In the endoscope front-projection type treatment instrument, an urging means for urging the distal treatment member in a direction projecting forward from the distal end of the flexible sheath is provided, and the distal treatment member resists the urging force of the urging means. And pulled toward the distal end of the flexible sheath Oite provided a locking and unlocking freely operating member locking means relative to the operation portion main body slide operation member.

以下、図面を参照して本発明の実施例を説明する。
図１は本発明の第１の実施例の内視鏡用前方突出型処置具の全体構成を示しており、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、例えば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により形成されている。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows the overall configuration of a front-projecting treatment instrument for an endoscope according to a first embodiment of the present invention, and a flexible sheath that is inserted into and removed from a treatment instrument insertion channel of an endoscope (not shown). 1 is formed of an electrically insulating flexible tube such as a tetrafluoroethylene resin tube.

可撓性シース１内には、可撓性を有する導電性の操作ワイヤ２が軸線方向に進退自在に全長にわたって挿通配置されていて、導電性の剛体からなる先端処置部材３が可撓性シース１の先端に連結されている。なお、この実施例の先端処置部材３はフック状に形成されているが、その他の形状のものであってもよい。 A flexible conductive operation wire 2 is inserted through the entire length of the flexible sheath 1 so as to be movable back and forth in the axial direction, and the distal treatment member 3 made of a conductive rigid body is provided with the flexible sheath. 1 is connected to the tip. Although the distal treatment member 3 of this embodiment is formed in a hook shape, it may have other shapes.

１０は、可撓性シース１の基端側から操作ワイヤ２を進退操作するための操作部であり、可撓性シース１の基端に取り付けられた基端口金９が、操作部本体１１の先端に取り付けられた受け口金１９に対して、例えばルアーロック係合等により着脱自在に連結されている。 Reference numeral 10 denotes an operation unit for operating the operation wire 2 to advance and retract from the proximal end side of the flexible sheath 1, and a proximal end cap 9 attached to the proximal end of the flexible sheath 1 is attached to the operation unit main body 11. For example, a luer lock engagement or the like is detachably connected to the receiving cap 19 attached to the tip.

受け口金１９は、操作部本体１１に対して軸線方向には移動できないが軸線周りには回転自在に取り付けられており、受け口金１９を動かないように保持して操作部本体１１を軸線周りに回転させれば、可撓性シース１内で操作ワイヤ２が軸線周りに回転して、先端処置部材３が可撓性シース１の先端部分で軸線周り方向に回転する。 The receiving base 19 cannot be moved in the axial direction with respect to the operation unit main body 11 but is rotatably attached around the axial line. The receiving base 19 is held so as not to move, and the operation unit main body 11 is moved around the axis. When rotated, the operation wire 2 rotates around the axis within the flexible sheath 1, and the distal treatment member 3 rotates around the axis at the distal end portion of the flexible sheath 1.

丸棒状に形成された操作部本体１１の手元側端部には操作者の親指を係合させるための環状の第１の指掛け１２が設けられ、操作部本体１１の丸棒状部分には一定幅のスリット１３が軸線方向に真っ直ぐにほぼ全長にわたって形成されている。Ｓ−Ｓは、スリット１３部分の断面形状を示している。 An annular first finger hook 12 for engaging the operator's thumb is provided at the proximal end of the operation portion main body 11 formed in a round bar shape, and the round bar portion of the operation portion main body 11 has a constant width. The slit 13 is formed substantially over the entire length in a straight line in the axial direction. SS indicates a cross-sectional shape of the slit 13 portion.

操作部本体１１にスライド自在に係合するスライド操作部材１４は、操作ワイヤ２の基端２ａが連結固定された板状部材１４ａと、操作者の人指し指と中指を係合させる第２の指掛け１４ｂとが一体的に結合されたものであり、図示されていない高周波電源コードを接続するための接続端子１５が操作ワイヤ２に電気的に導通する状態に配置されている。 The slide operation member 14 slidably engaged with the operation portion main body 11 includes a plate-like member 14a to which the proximal end 2a of the operation wire 2 is connected and fixed, and a second finger hook 14b for engaging the operator's index finger and middle finger. Are integrally coupled, and a connection terminal 15 for connecting a high-frequency power cord (not shown) is disposed in a state of being electrically connected to the operation wire 2.

第２の指掛け１４ｂには操作部本体１１の丸棒状部分が緩く嵌合する断面形状が円形の貫通孔が形成され、板状部材１４ａはスリット１３内に軸線方向にスライド自在に嵌め込まれている。 The second finger hook 14b is formed with a through-hole having a circular cross-sectional shape into which the round bar-like portion of the operation portion main body 11 is loosely fitted. .

したがって、矢印Ａで示されるようにスライド操作部材１４をスライド操作することにより、操作ワイヤ２が可撓性シース１内で軸線方向に進退して、矢印Ｂで示されるように先端処置部材３が可撓性シース１の先端の前方において軸線方向に進退する。また、接続端子１５に高周波電源コードを接続することにより、操作ワイヤ２を介して先端処置部材３に高周波電流を通電することができる。 Therefore, when the slide operation member 14 is slid as indicated by the arrow A, the operation wire 2 advances and retreats in the axial direction within the flexible sheath 1, and the distal treatment member 3 is moved as indicated by the arrow B. It advances and retreats in the axial direction in front of the distal end of the flexible sheath 1. Further, by connecting a high frequency power cord to the connection terminal 15, a high frequency current can be applied to the distal treatment member 3 via the operation wire 2.

図２は、可撓性シース１の先端付近を示しており、操作ワイヤ２と先端処置部材３は金属製の接続パイプ４により機械的及び電気的に接続されている。可撓性シース１の最先端部分には略円筒状の先端口金５が固定的に取り付けられて、その先端口金５の先端開口より内径の小さな抜け止め筒体６が先端口金５の最先端部分に固着されている。 FIG. 2 shows the vicinity of the distal end of the flexible sheath 1, and the operation wire 2 and the distal treatment member 3 are mechanically and electrically connected by a metal connection pipe 4. A substantially cylindrical distal end cap 5 is fixedly attached to the most distal end portion of the flexible sheath 1, and a retaining cylinder 6 having an inner diameter smaller than the distal end opening of the distal end cap 5 is the most distal end portion of the distal end base 5. It is fixed to.

先端口金５内に位置する先端処置部材３の基部には、図３にも示されるように、上下一対の係合突起８ａが側方に突出形成されている。また、抜け止め筒体６の先端内周部分には、図２におけるIV−IV断面を図示する図４に示されるように、先端処置部材３に形成された係合突起８ａが軸線方向に移動することにより係脱する放射状の係合溝８ｂが全周にわたって等間隔に形成されている。この実施例では係合溝８ｂが３０°間隔で１２個形成されていて、係合突起８ａはその中のどの係合溝８ｂに対してもガタつきなく係合することができる。 As shown in FIG. 3, a pair of upper and lower engaging protrusions 8 a are formed on the base portion of the distal treatment member 3 located in the distal end cap 5 so as to protrude laterally. Further, as shown in FIG. 4 illustrating the IV-IV cross section in FIG. 2, an engaging protrusion 8 a formed on the distal treatment member 3 moves in the axial direction on the inner peripheral portion of the distal end of the retaining cylinder 6. Thus, radial engagement grooves 8b that are engaged and disengaged are formed at equal intervals over the entire circumference. In this embodiment, twelve engagement grooves 8b are formed at intervals of 30 °, and the engagement protrusions 8a can engage with any of the engagement grooves 8b therein without rattling.

先端処置部材３は、可撓性シース１の先端に対して（したがって、先端口金５及び抜け止め筒体６に対しても）軸線方向に進退自在に配置されていて、図２に示されるように係合突起８ａが抜け止め筒体６の先端小径部に後方から当接することにより、先端処置部材３のそれ以上の前進が規制される。 The distal treatment member 3 is disposed so as to be movable forward and backward in the axial direction with respect to the distal end of the flexible sheath 1 (and therefore also with respect to the distal end cap 5 and the retaining cylinder 6), as shown in FIG. Further, when the engagement protrusion 8a comes into contact with the small diameter portion of the distal end of the retaining cylinder 6 from the rear, further advancement of the distal treatment member 3 is restricted.

したがって、先端処置部材３がその進退範囲の前端の最も突出した位置にあるときは、係合突起８ａが係合溝８ｂに係合していて、先端処置部材３が可撓性シース１の先端に対して軸線周り方向に回転できない状態になる。 Therefore, when the distal treatment member 3 is at the most protruding position at the front end of the advance / retreat range, the engagement protrusion 8 a is engaged with the engagement groove 8 b, and the distal treatment member 3 is the distal end of the flexible sheath 1. However, it cannot rotate in the direction around the axis.

そして、先端処置部材３が操作ワイヤ２で牽引されて後方（即ち、可撓性シース１内の方向）に退避すると、図５に示されるように係合突起８ａと係合溝８ｂとの係合が外れて、先端処置部材３が可撓性シース１の先端に対して軸線周り方向に自由に回転できる状態になり、手元側で可撓性シース１に対して操作部１０を軸線周りに回転させることにより、可撓性シース１の先端で先端処置部材３が軸線周り方向に回転する。 Then, when the distal treatment member 3 is pulled by the operation wire 2 and retracted rearward (that is, in the direction in the flexible sheath 1), the engagement between the engagement protrusion 8a and the engagement groove 8b as shown in FIG. As a result, the distal end treatment member 3 can freely rotate in the direction around the axis with respect to the distal end of the flexible sheath 1, and the operation unit 10 is moved around the axis with respect to the flexible sheath 1 on the hand side. By rotating, the distal treatment member 3 rotates around the axis at the distal end of the flexible sheath 1.

このように構成された内視鏡用処置具の可撓性シース１の先端に取り付けられた先端口金５内には、図２及び図５に示されるように、圧縮コイルスプリング７（付勢手段）が、先端処置部材３を常に可撓性シース１の先端から前方に突出する方向に付勢する状態に、係合突起８ａの後端に後方から当接して配置されている。 In the distal end cap 5 attached to the distal end of the flexible sheath 1 of the endoscope treatment instrument thus configured, as shown in FIGS. 2 and 5, a compression coil spring 7 (biasing means) is provided. ) Is disposed in contact with the rear end of the engagement protrusion 8a from the rear in such a state that the distal treatment member 3 is always urged in a direction protruding forward from the distal end of the flexible sheath 1.

したがって、操作部１０が何も操作されていない状態では、図２に示されるように、先端処置部材３が最も突出した状態になって、回転規制手段８が係合状態（即ち、係合突起８ａと係合溝８ｂとが係合した状態）になっている。 Therefore, in a state in which no operation part 10 is operated, as shown in FIG. 2, the distal treatment member 3 is in the most protruded state, and the rotation restricting means 8 is in the engaged state (that is, the engagement protrusion). 8a and the engaging groove 8b are engaged).

そして、操作部１０でスライド操作部材１４により操作ワイヤ２が牽引操作された状態の時だけ、図５に示されるように、先端処置部材３が後方に退避して、回転規制手段８の係合状態が解除され、先端処置部材３が可撓性シース１に対して軸線周り方向に回転可能になる。 Then, only when the operation wire 2 is pulled by the slide operation member 14 in the operation unit 10, as shown in FIG. 5, the distal treatment member 3 is retracted backward and the rotation restricting means 8 is engaged. The state is released, and the distal treatment member 3 can rotate about the axis with respect to the flexible sheath 1.

そのような構成により、本実施例の内視鏡用前方突出型処置具を内視鏡の処置具挿通チャンネルに通して使用している最中に、必要に応じて可撓性シース１の先端に対する先端処置部材３の向きを調整することができる。 With such a configuration, the distal end of the flexible sheath 1 can be used as needed while the endoscope front-projecting treatment instrument of the present embodiment is being used through the treatment instrument insertion channel of the endoscope. The direction of the distal treatment member 3 with respect to can be adjusted.

そして、スライド操作部材１４の牽引操作を止めることで、図２に示されるように、先端処置部材３が圧縮コイルスプリング７の付勢力により可撓性シース１の先端から前方に最も突出した状態まで押し出される。 Then, by stopping the pulling operation of the slide operation member 14, as shown in FIG. 2, the distal treatment member 3 is protruded most forward from the distal end of the flexible sheath 1 by the urging force of the compression coil spring 7. Extruded.

すると、回転規制手段８が係合状態になるので、先端処置部材３が可撓性シース１の先端で軸線周り方向に自由に回転できないロック状態になり、圧縮コイルスプリング７の付勢力によりその状態が保たれて安全かつ容易に切開処置等を行うことができる。 Then, since the rotation restricting means 8 is in an engaged state, the distal treatment member 3 is in a locked state where the distal end of the flexible sheath 1 cannot freely rotate in the direction around the axis, and this state is brought about by the urging force of the compression coil spring 7. Therefore, incision or the like can be performed safely and easily.

図６及び図７に分解状態が示されるように、操作部本体１１の中間部分には、板状部材１４ａが係合及び係合解除自在な切り欠き１６（操作部材ロック手段）がスリット１３を挟む位置の壁部に形成されている。切り欠き１６は１８０°点対称の位置に一対形成されており、その先端側壁面１６ａは垂直壁（即ち、操作部本体１１等の軸線方向に対して垂直な壁面）である。 As shown in the exploded state in FIGS. 6 and 7, a notch 16 (operation member locking means) in which the plate-like member 14 a can be engaged and disengaged has a slit 13 in the middle portion of the operation portion main body 11. It is formed in the wall part of the position to pinch | interpose. A pair of notches 16 are formed at positions symmetrical with respect to 180 °, and the tip side wall surface 16a is a vertical wall (that is, a wall surface perpendicular to the axial direction of the operation portion main body 11 or the like).

そして、図１におけるVIII−VIII断面を図示する図８に示されるようにスリット１３内にスライド自在に係合している板状部材１４ａを、切り欠き１６の位置で軸線周りに回動させると、図９に示されるように板状部材１４ａが切り欠き１６に嵌まり込んだ状態に係合する。図１０は、その係合状態を示す部分斜視図であり、板状部材１４ａの軸線方向移動が切り欠き１６との係合によって阻止され、操作ワイヤ２が軸線方向に進退できなくなる。 Then, when the plate-like member 14a slidably engaged in the slit 13 is rotated around the axis at the position of the notch 16 as shown in FIG. 8 illustrating the VIII-VIII cross section in FIG. As shown in FIG. 9, the plate-like member 14 a engages with the notch 16. FIG. 10 is a partial perspective view showing the engaged state. The axial movement of the plate-like member 14a is blocked by the engagement with the notch 16, and the operation wire 2 cannot advance or retreat in the axial direction.

そのような板状部材１４ａの回動操作は、板状部材１４ａと一体に結合されている第２の指掛け１４ｂを操作部本体１１の軸線周りに回動させることで容易に行うことができ、第２の指掛け１４ｂから手を離してもその状態が保たれる。 Such a rotation operation of the plate-shaped member 14a can be easily performed by rotating the second finger hook 14b integrally coupled to the plate-shaped member 14a around the axis of the operation unit main body 11. Even if the hand is released from the second finger hook 14b, the state is maintained.

また、板状部材１４ａと切り欠き１６との係合を解く動作も、第２の指掛け１４ｂを逆方向に回動させるだけで容易に行うことができ、第２の指掛け１４ｂから手を離してもその状態が保たれる。 Further, the operation of releasing the engagement between the plate-like member 14a and the notch 16 can be easily performed only by rotating the second finger hook 14b in the reverse direction, and the hand is released from the second finger hook 14b. The state is maintained.

図１１は、そのようにして板状部材１４ａが切り欠き１６に係合した状態の内視鏡用前方突出型処置具の全体構成を示しており（図９におけるXI−XI断面図に相当）、先端処置部材３が圧縮コイルスプリング７の付勢力に抗して可撓性シース１の先端側に引き寄せられた状態のときに板状部材１４ａが切り欠き１６に係合するように、組み立て時に操作ワイヤ２の長さが調整されている。 FIG. 11 shows the overall configuration of the endoscope front-projection treatment instrument in a state where the plate-like member 14a is engaged with the notch 16 in this manner (corresponding to the XI-XI cross-sectional view in FIG. 9). When the assembly is performed such that the plate-like member 14a engages with the notch 16 when the distal treatment member 3 is pulled toward the distal end side of the flexible sheath 1 against the urging force of the compression coil spring 7. The length of the operation wire 2 is adjusted.

したがって、図示されていない内視鏡の処置具挿通チャンネルに可撓性シース１を挿脱する際には、操作部１０において板状部材１４ａが切り欠き１６に係合した状態にすることにより、先端処置部材３が可撓性シース１の先端側に引き寄せられた退避状態が保たれ、先端処置部材３が破損したり、逆に先端処置部材３で処置具挿通チャンネルの内面を傷つけたりするおそれがない。 Therefore, when the flexible sheath 1 is inserted into and removed from the treatment instrument insertion channel of the endoscope (not shown), the plate-like member 14a is engaged with the notch 16 in the operation portion 10, The retracted state in which the distal treatment member 3 is drawn toward the distal end side of the flexible sheath 1 is maintained, and the distal treatment member 3 may be damaged, or conversely, the distal treatment member 3 may damage the inner surface of the treatment instrument insertion channel. There is no.

そして、可撓性シース１の先端が処置具挿通チャンネル内を通過したら、操作部１０において板状部材１４ａと切り欠き１６との係合を解くことにより、先端処置部材３が圧縮コイルスプリング７の付勢力で前方に最も突出した状態が保たれ、内視鏡を操作する術者による一人操作でも安定した状態で処置を行うことができる。 When the distal end of the flexible sheath 1 passes through the treatment instrument insertion channel, the distal treatment member 3 of the compression coil spring 7 is released by releasing the engagement between the plate-like member 14 a and the notch 16 in the operation portion 10. The state that protrudes most forward by the urging force is maintained, and even a single operation by an operator who operates the endoscope can be performed in a stable state.

このように、操作部本体１１に切り欠き１６を形成するだけという極めて簡単な構成により、そしてスライド操作部材１４を軸線周りに回動操作するだけという極めて簡単な操作により、処置具操作において優れた作用効果を得ることができる。 As described above, the operation tool body 11 is excellent in operation of the treatment tool by an extremely simple configuration in which only the notch 16 is formed in the operation portion main body 11 and by an extremely simple operation in which only the slide operation member 14 is rotated around the axis. An effect can be obtained.

図１２は本発明の第２の実施例を示しており、切り欠き１６の先端側壁面１６ａと板状部材１４ａとに、互いにクリック係合する凹部１７と凸部１８を形成したものである。その他の部分は第１の実施例と同じ構成である。このようにすることにより、板状部材１４ａが切り欠き１６に係合した状態をより安定して維持させることができる。 FIG. 12 shows a second embodiment of the present invention, in which a concave portion 17 and a convex portion 18 that are click-engaged with each other are formed on the tip side wall surface 16a of the notch 16 and the plate-like member 14a. Other parts are the same as those of the first embodiment. By doing in this way, the state which the plate-shaped member 14a engaged with the notch 16 can be maintained more stably.

図１３及び図１４は本発明の第３の実施例を示しており、切り欠き１６の先端側壁面１６ａを切り欠き１６の開口部側から奥側へ次第に後退する斜面状に形成したものである。その他の部分は第１の実施例と同じ構成である。 FIGS. 13 and 14 show a third embodiment of the present invention, in which the front end side wall surface 16a of the notch 16 is formed in a slope shape gradually retreating from the opening side of the notch 16 to the back side. . Other parts are the same as those of the first embodiment.

このようにすることにより、温度変化や屈曲の程度の変化等により可撓性シース１と操作ワイヤ２の各長さにバラツキが発生しても、板状部材１４ａを切り欠き１６の先端側壁面１６ａの何処かに当接させることで、先端処置部材３を可撓性シース１の先端側に最も引き寄せられた退避状態に確実に保持することができる。 By doing so, even if the lengths of the flexible sheath 1 and the operation wire 2 are varied due to temperature changes, changes in the degree of bending, etc., the plate-like member 14a is cut away from the distal end side wall surface of the notch 16. By abutting somewhere on 16a, the distal treatment member 3 can be reliably held in the retracted state that is most drawn toward the distal end side of the flexible sheath 1.

図１５は、第３の実施例と同様に切り欠き１６の開口部側から奥側へ次第に後退する斜面状に形成された先端側壁面１６ａに階段状の段差を形成したものである。このように構成することにより、切り欠き１６の先端側壁面１６ａの途中の位置においても板状部材１４ａを安定した状態に係合させてその状態を保持することができる。 FIG. 15 shows a stepped step formed on the tip side wall surface 16a which is formed in a slope shape gradually retreating from the opening side to the back side of the notch 16 as in the third embodiment. By configuring in this way, the plate-like member 14a can be engaged in a stable state and maintained at a position in the middle of the front end side wall surface 16a of the notch 16 as well.

本発明の第１の実施例の内視鏡用前方突出型処置具の全体構成を示す側面断面図である。It is side surface sectional drawing which shows the whole structure of the front protrusion type treatment tool for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用前方突出型処置具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 front protrusion type treatment tool for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用前方突出型処置具の先端処置部材の斜視図である。It is a perspective view of the front-end | tip treatment member of the front protrusion type treatment tool for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用前方突出型処置具の図２におけるIV−IV断面図である。It is IV-IV sectional drawing in FIG. 2 of the front protrusion type treatment tool for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用前方突出型処置具の先端部分の動作を説明する側面断面図である。It is side surface sectional drawing explaining operation | movement of the front-end | tip part of the front protrusion type treatment tool for endoscopes of 1st Example of this invention. 本発明の第１の実施例の内視鏡用前方突出型処置具の操作部の部分分解斜視図である。It is a partial disassembled perspective view of the operation part of the front-projection type treatment instrument for an endoscope according to the first embodiment of the present invention. 本発明の第１の実施例の内視鏡用前方突出型処置具の操作部の部分分解側面断面図である。It is a partial exploded side sectional view of the operation part of the forward projection type treatment instrument for endoscopes of the 1st example of the present invention. 本発明の第１の実施例の内視鏡用前方突出型処置具の図１におけるVIII−VIII断面図である。It is VIII-VIII sectional drawing in FIG. 1 of the front protrusion type treatment tool for endoscopes of the 1st Example of this invention. 図８に示される状態から板状部材１４ａが切り欠き１６に係合した状態の断面図である。FIG. 9 is a cross-sectional view of a state in which a plate-like member 14a is engaged with a notch 16 from the state shown in FIG. 本発明の第１の実施例の板状部材１４ａが切り欠き１６に係合した状態の部分斜視図である。It is a fragmentary perspective view in the state where plate-like member 14a of the 1st example of the present invention engaged with notch 16. 本発明の第１の実施例の板状部材１４ａが切り欠き１６に係合した状態の内視鏡用前方突出型処置具の全体構成を示す側面断面図である。It is side surface sectional drawing which shows the whole structure of the front protrusion type treatment tool for endoscopes of the state which the plate-shaped member 14a of the 1st Example of this invention engaged with the notch. 本発明の第２の実施例の内視鏡用前方突出型処置具の操作部の部分分解斜視図である。It is a partial disassembled perspective view of the operation part of the front protrusion type treatment tool for endoscopes of the 2nd example of the present invention. 本発明の第３の実施例の内視鏡用前方突出型処置具の操作部の部分分解斜視図である。It is a partial disassembled perspective view of the operation part of the frontward protrusion type treatment tool for endoscopes of the 3rd Example of the present invention. 本発明の第３の実施例の内視鏡用前方突出型処置具の操作部の部分分解側面断面図である。It is a partial exploded side sectional view of an operation part of a forward projection type treatment instrument for endoscopes of the 3rd example of the present invention. 本発明の第４の実施例の内視鏡用前方突出型処置具の操作部の部分分解斜視図である。It is a partial disassembled perspective view of the operation part of the front protrusion type treatment tool for endoscopes of the 4th example of the present invention.

符号の説明Explanation of symbols

１可撓性シース
２操作ワイヤ
３先端処置部材
７圧縮コイルスプリング（付勢手段）
１０操作部
１１操作部本体
１３スリット
１４スライド操作部材
１４ａ板状部材
１４ｂ第２の指掛け（指掛け部材）
１６切り欠き（操作部材ロック手段）
１６ａ先端側壁面
１７，１８凹部と凸部 DESCRIPTION OF SYMBOLS 1 Flexible sheath 2 Operation wire 3 End treatment member 7 Compression coil spring (biasing means)
DESCRIPTION OF SYMBOLS 10 Operation part 11 Operation part main body 13 Slit 14 Slide operation member 14a Plate-shaped member 14b 2nd finger hook (finger hook member)
16 Notch (operating member locking means)
16a Tip side wall surface 17, 18 Concave portion and convex portion

Claims

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の先端部分に配置された先端処置部材が、上記可撓性シース内に挿通された可撓性の操作ワイヤを上記可撓性シースの基端に連結された操作部において軸線方向に進退操作することにより、上記可撓性シースの先端から前方に突出する状態に進退するように構成された内視鏡用前方突出型処置具であって、
上記操作部には、上記可撓性シースの基端に連結された操作部本体と、上記操作ワイヤの基端に連結されて上記操作部本体に対しスライド自在に係合するスライド操作部材とが設けられた内視鏡用前方突出型処置具において、
上記先端処置部材を上記可撓性シースの先端から前方に突出する方向に付勢する付勢手段を設けると共に、上記先端処置部材が上記付勢手段の付勢力に抗して上記可撓性シースの先端側に引き寄せられた状態において、上記スライド操作部材を上記操作部本体に対し係止及び係止解除自在な操作部材ロック手段を設けたことを特徴とする内視鏡用前方突出型処置具。 The distal treatment member disposed at the distal end portion of the flexible sheath that is inserted into and removed from the treatment instrument insertion channel of the endoscope has the flexible operation wire inserted into the flexible sheath. A forward-projecting treatment instrument for an endoscope configured to advance and retract in a state of projecting forward from the distal end of the flexible sheath by performing an advance / retreat operation in an axial direction at an operation unit connected to the proximal end of the sheath. Because
The operation portion includes an operation portion main body connected to the proximal end of the flexible sheath, and a slide operation member connected to the proximal end of the operation wire and slidably engaged with the operation portion main body. In the endoscope front-projection type treatment instrument provided,
There is provided biasing means for biasing the distal treatment member in a direction protruding forward from the distal end of the flexible sheath, and the flexible sheath is against the biasing force of the biasing means. An operation-protruding treatment instrument for an endoscope, which is provided with an operation member locking means capable of locking and releasing the slide operation member with respect to the operation portion main body in a state of being pulled toward the distal end side of the endoscope .

上記付勢手段が上記シースの先端部分に内蔵されている請求項１記載の内視鏡用前方突出型処置具。 The endoscope forward-projecting treatment instrument according to claim 1, wherein the biasing means is built in a distal end portion of the sheath.

上記スライド操作部材には、上記操作ワイヤの基端に連結された板状部材と、その板状部材に連結された指掛け部材とが設けられて、上記操作部本体には、上記板状部材がスライド自在に係合するスリットが形成されると共に、上記操作部材ロック手段として、上記板状部材が上記操作ワイヤの軸線周りに回転されることにより係合する切り欠きが、上記スリットを挟む位置の壁部に形成されている請求項１又は２記載の内視鏡用前方突出型処置具。 The slide operation member is provided with a plate-like member connected to the base end of the operation wire, and a finger hooking member connected to the plate-like member, and the plate-like member is provided on the operation portion main body. A slit that is slidably engaged is formed, and as the operation member locking means, a notch that engages when the plate-like member is rotated around the axis of the operation wire is located at a position sandwiching the slit. The forward protruding treatment tool for an endoscope according to claim 1 or 2, wherein the treatment tool is formed on a wall portion.

上記スリットは、上記操作部本体の丸棒状部分に軸線方向に真っ直ぐに形成されていて、その丸棒状部分が、上記指掛け部材に貫通形成された孔内に緩く嵌合している請求項３記載の内視鏡用前方突出型処置具。 The said slit is formed in the round bar-shaped part of the said operation part main body in the straight line direction, and the round bar-shaped part is loosely fitted in the hole penetrated by the said finger-hook member. A forward-projecting treatment tool for endoscopes.

上記切り欠きの先端側壁面が垂直壁である請求項１ないし４のいずれかの項に記載の内視鏡用前方突出型処置具。 The front-projection type treatment instrument for an endoscope according to any one of claims 1 to 4, wherein a front end side wall surface of the notch is a vertical wall.

上記切り欠きの先端側壁面と上記板状部材とに、互いにクリック係合する凹部と凸部が形成されている請求項５記載の内視鏡用前方突出型処置具。 The forward projecting type treatment instrument for an endoscope according to claim 5, wherein a concave portion and a convex portion that are click-engaged with each other are formed on the side wall surface of the notch and the plate member.

上記切り欠きの先端側壁面が上記切り欠きの開口部側から奥側へ次第に後退する斜面状に形成されている請求項１ないし４のいずれかの項に記載の内視鏡用前方突出型処置具。 The front-projection type treatment for an endoscope according to any one of claims 1 to 4, wherein a front end side wall surface of the notch is formed in a slope shape gradually retreating from the opening side to the back side of the notch. Ingredients.

上記切り欠きの先端側壁面に階段状の段差が形成されている請求項７記載の内視鏡用前方突出型処置具。 The endoscope front-projection type treatment instrument according to claim 7, wherein a stepped step is formed on a front end side wall surface of the notch.