JP4827514B2 - Endoscope operation lever connection and fixing structure - Google Patents

Endoscope operation lever connection and fixing structure Download PDF

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JP4827514B2
JP4827514B2 JP2005358387A JP2005358387A JP4827514B2 JP 4827514 B2 JP4827514 B2 JP 4827514B2 JP 2005358387 A JP2005358387 A JP 2005358387A JP 2005358387 A JP2005358387 A JP 2005358387A JP 4827514 B2 JP4827514 B2 JP 4827514B2
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operation lever
rotating shaft
endoscope
fixing structure
seat plate
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JP2007159744A (en
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義則 丸山
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Hoya Corp
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Hoya Corp
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Description

この発明は、内視鏡の操作部に設けられた回転軸の突端部に操作レバーがビス止めにより連結固定された内視鏡の操作レバーの連結固定構造に関する。   The present invention relates to a connection fixing structure for an operation lever of an endoscope in which an operation lever is connected and fixed to a protruding end portion of a rotating shaft provided in an operation portion of the endoscope by screws.

内視鏡の挿入部の先端近傍に設けられた湾曲部を手元側の操作部からの遠隔操作で屈曲させる操作を行うために、操作部に設けられた回転軸の突端部に湾曲操作レバーが取り付けられており、操作部を分解修理する際の必要性等から、湾曲操作レバーは回転軸の突端部にビス止め固定された構成になっている（例えば、特許文献１、２）。
特開２００５−１６０７９１ 特開２０００−１２６１１９ In order to perform an operation to bend the bending portion provided near the distal end of the insertion portion of the endoscope by remote operation from the operation portion on the hand side, a bending operation lever is provided at the protruding end portion of the rotary shaft provided in the operation portion. The bending operation lever is fixed to the projecting end portion of the rotating shaft by screws because of the necessity for disassembling and repairing the operation portion (for example, Patent Documents 1 and 2).
JP 2005-160791 JP 2000-126119 A

図１６は従来の内視鏡の操作レバーの連結固定構造の一例を示しており、内視鏡の操作部９０に設けられた回転軸９１の突端面にネジ孔９２が形成されて、そこに湾曲操作レバー９３が固定ビス９４で押圧固定されている。   FIG. 16 shows an example of a conventional connecting and fixing structure of an operation lever of an endoscope. A screw hole 92 is formed in a projecting end surface of a rotary shaft 91 provided in an operation portion 90 of the endoscope, and there is provided there. The bending operation lever 93 is pressed and fixed with a fixing screw 94.

しかし、回転軸９１には図示されていない湾曲操作ワイヤを牽引するための大きな力が作用するだけでなく、回転軸９１が図示されていないストッパにぶつかってそれ以上の回転が規制された状態になっても、湾曲操作レバー９３に大きな操作力が加えられる場合がある。   However, not only a large force for pulling the bending operation wire (not shown) acts on the rotation shaft 91 but also the rotation shaft 91 hits a stopper (not shown) so that further rotation is restricted. Even in such a case, a large operating force may be applied to the bending operation lever 93.

そのため、回転運動方向に対して垂直方向に作用する固定ビス９４の押圧力だけで湾曲操作レバー９３を回転軸９１に固定する図１６の構成では、すぐにガタつきが発生してしまう場合がある。   Therefore, in the configuration of FIG. 16 in which the bending operation lever 93 is fixed to the rotation shaft 91 only by the pressing force of the fixing screw 94 acting in the direction perpendicular to the rotational movement direction, rattling may occur immediately. .

また、図１７は従来の内視鏡の操作レバーの連結固定構造の他の例を示しており、回転軸９１の突端面に底側へ次第に幅が狭まった溝９５が形成され、湾曲操作レバー９３側も溝９５にピッタリ嵌まり込む台形状に形成されて、皿ビス９６により湾曲操作レバー９３が回転軸９１に押圧固定されている。   FIG. 17 shows another example of a conventional connecting and fixing structure of an operation lever of an endoscope. A groove 95 which is gradually narrowed to the bottom side is formed on the projecting end surface of the rotating shaft 91, and the bending operation lever is formed. The 93 side is also formed in a trapezoidal shape that fits perfectly into the groove 95, and the bending operation lever 93 is pressed and fixed to the rotating shaft 91 by a countersunk screw 96.

しかしそのような構成を採ると、例えば湾曲操作レバー９３で回転軸９１を回転限界位置以上に回転させようとする力が作用したとき等には、溝９５側から湾曲操作レバー９３が受ける反力によって皿ビス９６を斜め上に持ち上げる力が発生するため、皿ビス９６が緩んで湾曲操作レバー９３が回転軸９１に対してガタついた状態になってしまい易い。   However, when such a configuration is adopted, for example, when a force for rotating the rotation shaft 91 beyond the rotation limit position is applied by the bending operation lever 93, the reaction force received by the bending operation lever 93 from the groove 95 side. As a result, a force to lift the countersunk screw 96 upward is generated, so that the countersunk screw 96 is loosened and the bending operation lever 93 is likely to be loose with respect to the rotary shaft 91.

また、図１８に示されるように、溝９５が形成された回転軸９１の突端部分が湾曲操作レバー９３側から受ける力で広がった状態に塑性変形してしまうことにより、操作部カバー９７を取り外せなくなって操作部９０が分解不能になってしまう場合がある。   Further, as shown in FIG. 18, the operating portion cover 97 can be removed by plastic deformation of the protruding end portion of the rotating shaft 91 in which the groove 95 is formed to a state where it is expanded by the force received from the bending operation lever 93 side. In some cases, the operation unit 90 may not be disassembled.

そこで本発明は、回転軸に対して操作レバーを、操作部の分解性を損なうことなくビス止めにより強固に安定した状態に連結固定することができる内視鏡の操作レバーの連結固定構造を提供することを目的とする。   Therefore, the present invention provides a connection fixing structure for an operation lever of an endoscope that can connect and fix the operation lever to the rotating shaft in a stable and stable state by screwing without impairing the disassembly of the operation unit. The purpose is to do.

上記の目的を達成するため、本発明の内視鏡の操作レバーの連結固定構造は、内視鏡の
操作部に設けられた回転軸の突端部に操作レバーがビス止めにより連結固定された内視鏡の操作レバーの連結固定構造において、回転軸の突端面に凹溝を形成すると共にその凹溝の底面にネジ孔を形成し、操作レバーの基端部分には凹溝内に嵌まり込む幅の座板を形成して、座板を基端まで半幅に分割するスリットと、中心軸線がスリットを通過する皿孔とを座板に形成し、皿孔の形状に対応する皿状の頭部を有する皿ビスを皿孔側からネジ孔に締め込むことにより、スリットの幅が押し広げられる状態に座板が弾性変形して、座板の側壁外面が回転軸の凹溝の側壁内面に圧接された状態になって、操作レバーが回転軸に固定されるようにしたものである。 In order to achieve the above object, the endoscope operation lever coupling and fixing structure according to the present invention is such that an operation lever is coupled and fixed to a protruding end portion of a rotary shaft provided in an endoscope operation unit by screwing. In the connecting and fixing structure of the operation lever of the endoscope, a concave groove is formed on the protruding end surface of the rotating shaft and a screw hole is formed on the bottom surface of the concave groove, and the base end portion of the operating lever is fitted into the concave groove. A slit-shaped head corresponding to the shape of the countersink hole is formed by forming a slit that divides the baseplate into half widths to the base end and a countersink whose central axis passes through the slit. By tightening a countersunk screw with a threaded part into the screw hole from the countersink side, the seat plate elastically deforms in a state where the width of the slit is expanded, and the outer surface of the side wall of the seat plate becomes the inner surface of the concave groove of the rotating shaft The operation lever is fixed to the rotating shaft by being pressed.

なお、凹溝が底側へ次第に幅が広がった台形状の断面形状に形成されていて、座板の断面形状も凹溝の断面形状に対応する台形状の断面形状に形成されていてもよく、凹溝が深さ方向に幅が一定の矩形状の断面形状に形成されていて、座板も凹溝の断面形状に対応する矩形状の断面形状に形成されていてもよい。また、ネジ孔が凹溝に沿った方向の中心線位置に複数形成されていてもよい。   The groove may be formed in a trapezoidal cross-sectional shape that gradually widens toward the bottom, and the cross-sectional shape of the seat plate may be formed in a trapezoidal cross-sectional shape corresponding to the cross-sectional shape of the groove. The concave groove may be formed in a rectangular cross-sectional shape having a constant width in the depth direction, and the seat plate may be formed in a rectangular cross-sectional shape corresponding to the cross-sectional shape of the concave groove. A plurality of screw holes may be formed at the center line position in the direction along the groove.

そして、操作レバー側に、回転軸を挟み込むフォーク状の一対の補強腕が形成されていてもよく、その場合、座板を半幅に分割するスリットと平行に、補強腕の付け根側から操作レバーを分割するスリットが形成されていてもよく、補強腕の内壁面が、回転軸の外周面に嵌合する円弧状に形成されていてもよい。   A pair of fork-shaped reinforcing arms that sandwich the rotation shaft may be formed on the operating lever side.In that case, the operating lever is installed from the base side of the reinforcing arm in parallel with the slit that divides the seat plate into half widths. A slit to be divided may be formed, and the inner wall surface of the reinforcing arm may be formed in an arc shape that fits to the outer peripheral surface of the rotating shaft.

また、回転軸の外縁の断面形状が円形状に形成されていてもよく、回転軸の外周面の補強腕が当接する部分が平面状に切り削がれていてもよい。また、回転軸の外縁の断面形状が矩形状に形成されていてもよく、その場合、操作レバー側に、回転軸の外周面に嵌合する嵌合壁が形成されていてもよく、嵌合壁が座板に形成されていてもよい。   Moreover, the cross-sectional shape of the outer edge of a rotating shaft may be formed circularly, and the part which the reinforcement arm of the outer peripheral surface of a rotating shaft contact | abuts may be cut off planarly. The cross-sectional shape of the outer edge of the rotating shaft may be formed in a rectangular shape. In that case, a fitting wall that fits on the outer peripheral surface of the rotating shaft may be formed on the operation lever side. The wall may be formed on the seat plate.

また、凹溝の底面の幅方向の両端位置から回転軸の軸線と平行方向に回転軸を分割するスリットが形成されていてもよい。   Moreover, the slit which divides | segments a rotating shaft in the direction parallel to the axis line of a rotating shaft from the both ends position of the width direction of the bottom face of a ditch | groove may be formed.

本発明によれば、皿ビスを皿孔側からネジ孔に締め込むことにより、操作レバー側に形成されたスリットの幅が押し広げられる状態に操作レバーの座板が弾性変形して、座板の側壁外面が回転軸の凹部の側壁内面に圧接された状態になって、回転軸と操作レバーを塑性変形させることなく操作レバーが回転軸に固定されるので、回転軸に対して操作レバーを、操作部の分解性を損なうことなくビス止めにより強固に安定した状態に連結固定することができる。   According to the present invention, by tightening the countersunk screw into the screw hole from the countersink side, the seat plate of the operation lever is elastically deformed so that the width of the slit formed on the control lever side is expanded, and the seat plate Since the outer surface of the side wall is in pressure contact with the inner surface of the side wall of the recess of the rotating shaft, the operating lever is fixed to the rotating shaft without plastically deforming the rotating shaft and the operating lever. And, it can be firmly fixed in a stable state by screwing without impairing the decomposability of the operation part.

内視鏡の操作部に設けられた回転軸の突端部に操作レバーがビス止めにより連結固定された内視鏡の操作レバーの連結固定構造において、回転軸の突端面に凹溝を形成すると共にその凹溝の底面にネジ孔を形成し、操作レバーの基端部分には凹溝内に嵌まり込む幅の座板を形成して、座板を基端まで半幅に分割するスリットと、中心軸線がスリットを通過する皿孔とを座板に形成し、皿孔の形状に対応する皿状の頭部を有する皿ビスを皿孔側からネジ孔に締め込むことにより、スリットの幅が押し広げられる状態に座板が弾性変形して、座板の側壁外面が回転軸の凹溝の側壁内面に圧接された状態になって、操作レバーが回転軸に固定されるようにする。   In the connecting and fixing structure of the operating lever of the endoscope, in which the operating lever is connected and fixed to the protruding end portion of the rotating shaft provided on the operating portion of the endoscope by screwing, a concave groove is formed on the protruding end surface of the rotating shaft. A screw hole is formed in the bottom surface of the concave groove, a base plate having a width that fits into the concave groove is formed at the base end portion of the operation lever, and a slit that divides the seat plate into a half width to the base end, and a center By forming a countersink in the seat plate with an axis passing through the slit, and tightening a countersunk screw with a countersunk head corresponding to the shape of the countersink into the screw hole from the countersink side, the slit width is pushed. The seat plate is elastically deformed so as to be spread, and the outer surface of the side wall of the seat plate is brought into pressure contact with the inner surface of the side wall of the concave groove of the rotation shaft so that the operation lever is fixed to the rotation shaft.

図面を参照して本発明の実施例を説明する。
図６は本発明が適用される内視鏡の全体構成の一例を示しており、体内に挿入される可撓性の挿入部１の先端近傍部分に、遠隔操作によって屈曲する湾曲部２が形成され、観察
窓等が配置された先端部本体３が湾曲部２の先端に連結されている。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 6 shows an example of the entire configuration of an endoscope to which the present invention is applied. A bending portion 2 that is bent by remote operation is formed in the vicinity of the distal end of a flexible insertion portion 1 that is inserted into the body. The distal end portion main body 3 on which the observation window and the like are arranged is connected to the distal end of the bending portion 2.

挿入部１の基端に連結された操作部４には、湾曲部２を屈曲操作するための湾曲操作レバー５が回動自在に配置されており、湾曲操作レバー５を回動操作することにより湾曲操作ワイヤ６が牽引されて湾曲部２が屈曲する。   A bending operation lever 5 for bending the bending portion 2 is rotatably arranged on the operation portion 4 connected to the base end of the insertion portion 1. By rotating the bending operation lever 5, The bending operation wire 6 is pulled and the bending portion 2 is bent.

７は、操作ワイヤ６の基端が連結された図示されていないプーリを回転駆動するように操作部４に回転自在に配置された回転軸であり、その突端面に湾曲操作レバー５が二本の皿ビス８で着脱自在に連結固定されている。   Reference numeral 7 denotes a rotary shaft that is rotatably arranged on the operation unit 4 so as to rotationally drive a pulley (not shown) to which the base end of the operation wire 6 is connected. Two bending operation levers 5 are provided on the projecting end surface. It is connected and fixed detachably with a countersunk screw 8.

図１は、回転軸７に対する湾曲操作レバー５の固定部分の分解斜視図、図２は正面図である。回転軸７の突端面には底側へ次第に幅が広がった台形状の断面形状の凹溝７１が形成されて、その凹溝７１の底面７１ａには、凹溝７１に沿った方向の中心線位置に二つのネジ孔７２が回転軸７の軸線と平行に形成されている。   FIG. 1 is an exploded perspective view of a fixed portion of the bending operation lever 5 with respect to the rotating shaft 7, and FIG. 2 is a front view. A concave groove 71 having a trapezoidal cross-sectional shape gradually widening toward the bottom side is formed on the protruding end surface of the rotary shaft 7, and a center line in a direction along the concave groove 71 is formed on the bottom surface 71 a of the concave groove 71. Two screw holes 72 are formed at positions parallel to the axis of the rotary shaft 7.

一方、湾曲操作レバー５の基端部分には回転軸７の凹溝７１内に緩く嵌まり込む幅の座板５１が形成されていて、その座板５１の断面形状は凹溝７１の断面形状より僅かに幅狭で凹溝７１と同じ角度の台形状に形成されている。その部分の断面形状については、図２におけるIII−III断面図である図３に明示されている。   On the other hand, a seat plate 51 having a width that fits loosely into the recessed groove 71 of the rotating shaft 7 is formed at the proximal end portion of the bending operation lever 5, and the sectional shape of the seat plate 51 is the sectional shape of the recessed groove 71. It is formed in a trapezoidal shape that is slightly narrower and has the same angle as the concave groove 71. The sectional shape of the portion is clearly shown in FIG. 3, which is a sectional view taken along line III-III in FIG.

そして、図１及び図２に示されるように、湾曲操作レバー５には座板５１を半幅に分割するセンタースリット５２が基端側に達する状態に形成され、そのセンタースリット５２を通る二つの皿孔５３が、回転軸７側のネジ孔７２と位置を合わせて座板５１の板面に形成されている。センタースリット５２は、湾曲操作レバー５の基端側から二つの皿孔５３を突っ切ってさらに皿孔５３から離れた位置まで真っ直ぐに形成されている。   As shown in FIGS. 1 and 2, the bending operation lever 5 is formed with a center slit 52 that divides the seat plate 51 in half width so as to reach the base end side, and two dishes passing through the center slit 52. A hole 53 is formed in the plate surface of the seat plate 51 in alignment with the screw hole 72 on the rotating shaft 7 side. The center slit 52 is formed straight from the base end side of the bending operation lever 5 through the two countersinks 53 to a position further away from the countersink 53.

また、湾曲操作レバー５には、回転軸７を左右両側から挟み込むフォーク状の一対の補強腕５４が座板５１の左右両側に座板５１と平行に形成されていて、補強腕５４が当接する回転軸７の外周面部分が平面状に切り削がれている。７３がその切り削ぎ部である。そして、補強腕５４の付け根側から湾曲操作レバー５を分割するサイドスリット５５がセンタースリット５２と平行に形成されている。   The bending operation lever 5 has a pair of fork-shaped reinforcing arms 54 sandwiching the rotary shaft 7 from both the left and right sides, and is formed on both the left and right sides of the seat plate 51 in parallel with the seat plate 51. The outer peripheral surface portion of the rotating shaft 7 is cut into a flat shape. Reference numeral 73 denotes the cut portion. A side slit 55 that divides the bending operation lever 5 from the base side of the reinforcing arm 54 is formed in parallel with the center slit 52.

湾曲操作レバー５と回転軸７とは、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、皿孔５３の形状に対応する皿状の頭部を有する二本の皿ビス８が皿孔５３側からネジ孔７２にねじ込まれることにより、湾曲操作レバー５が回転軸７の突端に連結固定された状態になっている。   The bending operation lever 5 and the rotating shaft 7 are composed of two countersunk screws 8 each having a countersunk head corresponding to the shape of the countersink 53, as shown in FIG. Is screwed into the screw hole 72 from the countersink 53 side, so that the bending operation lever 5 is connected and fixed to the protruding end of the rotating shaft 7.

そして、皿ビス８がきつくねじ込まれると、図２に矢印Ｘで示されるように、皿ビス８の頭部によってセンタースリット５２の幅が広げられる状態に座板５１が弾性変形して、図５に示されるように、座板５１の側壁外面が回転軸７の凹溝７１の側壁内面に強く圧接された状態になる。   When the countersunk screw 8 is screwed in tightly, the seat plate 51 is elastically deformed so that the width of the center slit 52 is widened by the head of the countersunk screw 8 as shown by the arrow X in FIG. As shown in FIG. 5, the outer surface of the side wall of the seat plate 51 is strongly pressed against the inner surface of the side wall of the concave groove 71 of the rotating shaft 7.

すると、その座板５１と凹溝７１との圧接面が僅かではあるが下向きの斜面になっていて皿ビス８の締め付け方向に向いていることにより、座板５１が回転軸７の底面７１ａに潜ろうとする状態に強く押し付けられて固定された状態になり、皿ビス８の緩みや固定部のガタつきが発生しない。   Then, the pressure contact surface between the seat plate 51 and the recessed groove 71 is a slight but downward slope and faces the tightening direction of the countersunk screw 8, so that the seat plate 51 is placed on the bottom surface 71 a of the rotating shaft 7. It will be firmly pressed against the state where it is going to dive, and the flat screw 8 will not be loosened or the fixed part will not rattle.

また、回転軸７の突端部付近は、側方に広げようとする力が主に凹溝７１の底面７１ａ付近の位置からしか作用せず、また湾曲操作レバー５で挟まれていることも手伝って側方に広がった状態に塑性変形しないので、操作部４の分解に支障が発生することもない。   Further, in the vicinity of the projecting end portion of the rotating shaft 7, the force to spread laterally mainly acts only from the position near the bottom surface 71 a of the groove 71, and is also sandwiched by the bending operation lever 5. Therefore, there is no problem in disassembling the operation unit 4 because the plastic part is not plastically deformed in a laterally extended state.

このようにして、回転軸７に対して湾曲操作レバー５を二本の皿ビス８だけで強固に安定した状態にしかもコンパクトに連結固定することができる。そして、皿ビス８を緩めれば湾曲操作レバー５を回転軸７から取り外すことができ、側方に広がった状態に弾性変形していた座板５１が元の形状に戻って、繰り返し使用することができる。なお、座板５１が皿ビス８により押し広げられた状態になった時に塑性変形しないように、センタースリット５２とサイドスリット５５の長さを設定しておく。   In this manner, the bending operation lever 5 can be firmly and stably connected and fixed to the rotating shaft 7 with only the two countersunk screws 8. Then, if the countersunk screw 8 is loosened, the bending operation lever 5 can be removed from the rotating shaft 7, and the seat plate 51 that has been elastically deformed in a state of spreading laterally returns to its original shape and is repeatedly used. Can do. The lengths of the center slit 52 and the side slit 55 are set so that the seat plate 51 is not plastically deformed when the seat plate 51 is expanded by the countersunk screw 8.

図７は本発明の第２の実施例を示しており、回転軸７の外縁の断面形状を矩形状（例えば正方形）に形成したものである。このように構成すると、補強腕５４と回転軸７との当接面積を大きくすることができ、湾曲操作レバー５をより強固に回転軸７に連結固定することができる。   FIG. 7 shows a second embodiment of the present invention, in which the cross-sectional shape of the outer edge of the rotating shaft 7 is formed in a rectangular shape (for example, a square shape). If comprised in this way, the contact area of the reinforcement arm 54 and the rotating shaft 7 can be enlarged, and the bending operation lever 5 can be connected and fixed to the rotating shaft 7 more firmly.

図８は本発明の第３の実施例を示しており、回転軸７の突端面に形成されている凹溝７１を深さ方向に幅が一定の矩形状の断面形状に形成して、座板５１も凹溝７１の断面形状に対応する矩形状の断面形状に形成したものである。   FIG. 8 shows a third embodiment of the present invention, in which a concave groove 71 formed on the projecting end surface of the rotary shaft 7 is formed in a rectangular cross-sectional shape having a constant width in the depth direction, and a seat is formed. The plate 51 is also formed in a rectangular cross-sectional shape corresponding to the cross-sectional shape of the groove 71.

このように構成すると、回転軸７に対する湾曲操作レバー５の連結強度が第１の実施例より若干低下するが、座板５１の側壁外面が回転軸７の凹溝７１の側壁内面に強く圧接された状態になるので、従来の内視鏡の操作レバーの連結固定構造に比べると格段に強固に連結固定することができる。   With this configuration, the connection strength of the bending operation lever 5 to the rotating shaft 7 is slightly lower than that in the first embodiment, but the outer surface of the side wall of the seat plate 51 is strongly pressed against the inner surface of the side wall of the concave groove 71 of the rotating shaft 7. Therefore, it can be connected and fixed much more firmly than the conventional connecting and fixing structure of the operation lever of the endoscope.

図９及び図１０は本発明の第４の実施例を示しており、回転軸７の外周面に嵌合する嵌合壁５６を湾曲操作レバー５の座板５１の裏面部分に形成したものである。このように構成することにより、凹溝７１に対する座板５１の嵌め込みでは止められない方向の横ずれを嵌合によって抑えることができるので、回転軸７に対する湾曲操作レバー５の連結固定強度が向上する。   FIGS. 9 and 10 show a fourth embodiment of the present invention, in which a fitting wall 56 to be fitted to the outer peripheral surface of the rotating shaft 7 is formed on the back surface portion of the seat plate 51 of the bending operation lever 5. is there. By configuring in this way, lateral displacement in a direction that cannot be stopped by fitting of the seat plate 51 to the recessed groove 71 can be suppressed by fitting, so that the connecting and fixing strength of the bending operation lever 5 to the rotating shaft 7 is improved.

図１１は、本発明の第５の実施例を示しており、補強腕５４′の内壁面を回転軸７の外周に嵌合する円弧状に形成したものであり、この実施例では補強腕５４′が前方と後方から半分ずつ延出形成されている。このように構成しても、回転軸７に対する湾曲操作レバー５の連結固定強度を向上させることができる。   FIG. 11 shows a fifth embodiment of the present invention, in which the inner wall surface of the reinforcing arm 54 ′ is formed in an arc shape that fits to the outer periphery of the rotary shaft 7. In this embodiment, the reinforcing arm 54 is formed. ′ Is formed to extend from the front and the rear half. Even if comprised in this way, the connection fixed intensity | strength of the bending operation lever 5 with respect to the rotating shaft 7 can be improved.

図１２及び図１３は、本発明の第６の実施例を示しており、凹溝７１の底面７１ａの両端位置から回転軸７軸の軸線と平行方向に回転軸７を分割するスリット７４を形成したものである。このように構成することにより、皿ビス８で押された座板５１が、側方に押し広げられた状態に弾性変形して凹溝７１の内壁面に押し付けられると、それに押されてさらに回転軸７の突端部付近が補強腕５４の内壁面に強く押し付けられるので、回転軸７に対する湾曲操作レバー５の連結固定強度を向上させることができる。   12 and 13 show a sixth embodiment of the present invention, in which slits 74 that divide the rotating shaft 7 in the direction parallel to the axis of the rotating shaft 7 are formed from both end positions of the bottom surface 71a of the concave groove 71. It is a thing. By configuring in this way, when the seat plate 51 pressed by the countersunk screw 8 is elastically deformed into a state of being spread sideways and pressed against the inner wall surface of the groove 71, it is pressed and further rotated. Since the vicinity of the protruding end portion of the shaft 7 is strongly pressed against the inner wall surface of the reinforcing arm 54, the connecting and fixing strength of the bending operation lever 5 with respect to the rotating shaft 7 can be improved.

図１４及び図１５は、本発明の参考例を示しており、回転軸７の突端面に二つのネジ孔７２が形成されてその口元部分は皿状になっている。そして二つのネジ孔７２の中心位置を通るスリット７８が回転軸７の突端付近を二分割している。   14 and 15 show a reference example of the present invention, in which two screw holes 72 are formed on the projecting end surface of the rotating shaft 7, and the mouth portion thereof has a dish shape. A slit 78 passing through the center position of the two screw holes 72 divides the vicinity of the protruding end of the rotating shaft 7 into two.

そして、下方へ次第に幅が狭まった外側壁を有する凸部７７がスリット７８と平行の向きに回転軸７の突端面に突出形成されていて、湾曲操作レバー５には回転軸７の凸部７７が嵌め込まれる孔５８が凸部７７の断面形状に対応する断面形状で形成されている。   A convex portion 77 having an outer wall gradually narrowing downward is formed to project from the projecting end surface of the rotary shaft 7 in a direction parallel to the slit 78, and the convex portion 77 of the rotary shaft 7 is formed on the bending operation lever 5. Is formed in a cross-sectional shape corresponding to the cross-sectional shape of the convex portion 77.

このように構成すると、回転軸７にねじ込まれる皿ビス８で回転軸７側を押し広げて湾曲操作レバー５側に押し付けることにより、湾曲操作レバー５を回転軸７に連結固定する
ことができる。 If comprised in this way, the bending operation lever 5 can be connected and fixed to the rotating shaft 7 by expanding the rotating shaft 7 side with the countersunk screw 8 screwed into the rotating shaft 7 and pressing it against the bending operation lever 5 side.

なお、本発明は上記実施例に限定されず、例えば処置具起上操作レバー等のように湾曲操作レバー以外の操作レバーの連結固定部分に適用することもできる。   In addition, this invention is not limited to the said Example, For example, it can also apply to the connection fixed part of operation levers other than a bending operation lever like a treatment tool raising operation lever.

本発明の第１の実施例の内視鏡の操作レバーの連結固定構造の分解斜視図である。It is a disassembled perspective view of the connection fixing structure of the operation lever of the endoscope of the first embodiment of the present invention. 本発明の第１の実施例の内視鏡の操作レバーの連結固定構造の正面図である。It is a front view of the connection fixing structure of the operation lever of the endoscope of the first embodiment of the present invention. 本発明の第１の実施例の内視鏡の操作レバーの連結固定構造の図２におけるIII−III断面図である。FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2 of the connecting and fixing structure of the operation lever of the endoscope of the first embodiment of the present invention. 本発明の第１の実施例の内視鏡の操作レバーの連結固定構造の図２におけるIV−IV断面図である。FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2 of the connecting and fixing structure of the operation lever of the endoscope according to the first embodiment of the present invention. 本発明の第１の実施例の内視鏡の操作レバーの連結固定構造の皿ビスがきつくねじ込まれた状態の断面図（図２におけるIII−III断面図に相当する断面図）である。FIG. 3 is a cross-sectional view (a cross-sectional view corresponding to a cross-sectional view taken along the line III-III in FIG. 2) in which the countersunk screw of the connecting and fixing structure of the operation lever of the endoscope according to the first embodiment of the present invention is tightly screwed. 本発明が適用される内視鏡の一例の外観図である。1 is an external view of an example of an endoscope to which the present invention is applied. 本発明の第２の実施例の内視鏡の操作レバーの連結固定構造の正面図である。It is a front view of the connection fixation structure of the operation lever of the endoscope of the 2nd Example of this invention. 本発明の第３の実施例の内視鏡の操作レバーの連結固定構造の断面図（第１の実施例の図２におけるIII−III断面図に相当する断面図）である。It is sectional drawing (sectional drawing equivalent to the III-III sectional drawing in FIG. 2 of 1st Example) of the connection fixation structure of the operation lever of the endoscope of 3rd Example of this invention. 本発明の第４の実施例の内視鏡の操作レバーの連結固定構造の断面図（第１の実施例の図２におけるIV−IV断面図に相当する断面図）である。It is sectional drawing (sectional drawing equivalent to IV-IV sectional drawing in FIG. 2 of 1st Example) of the connection fixation structure of the operation lever of the endoscope of 4th Example of this invention. 本発明の第４の実施例の内視鏡の操作レバーの連結固定構造の分解斜視図である。It is a disassembled perspective view of the connection fixation structure of the operation lever of the endoscope of the 4th Example of this invention. 本発明の第５の実施例の内視鏡の操作レバーの連結固定構造の分解斜視図である。It is a disassembled perspective view of the connection fixing structure of the operation lever of the endoscope of the 5th Example of this invention. 本発明の第６の実施例の内視鏡の操作レバーの連結固定構造の断面図（第１の実施例の図２におけるIII−III断面図に相当する断面図）である。It is sectional drawing (sectional drawing equivalent to the III-III sectional drawing in FIG. 2 of 1st Example) of the connection fixation structure of the operation lever of the endoscope of 6th Example of this invention. 本発明の第６の実施例の内視鏡の操作レバーの連結固定構造の分解斜視図である。It is a disassembled perspective view of the connection fixing structure of the operation lever of the endoscope of the 6th Example of this invention. 本発明の参考例の断面図である。It is sectional drawing of the reference example of this invention. 本発明の参考例の分解斜視図である。It is a disassembled perspective view of the reference example of this invention. 従来の内視鏡の操作レバーの連結固定構造の一例の断面図である。It is sectional drawing of an example of the connection fixation structure of the operation lever of the conventional endoscope. 従来の内視鏡の操作レバーの連結固定構造の他の例の断面図である。It is sectional drawing of the other example of the connection fixation structure of the operation lever of the conventional endoscope. 従来の内視鏡の操作レバーの連結固定構造で生じる不具合の状態を例示する断面図である。It is sectional drawing which illustrates the state of the malfunction which arises in the connection fixed structure of the operation lever of the conventional endoscope.

符号の説明Explanation of symbols

５ 湾曲操作レバー
７ 回転軸
８ 皿ビス
５１ 座板
５２ センタースリット
５３ 皿孔
５４ 補強腕
５５ サイドスリット
５６ 嵌合壁
７１ 凹溝
７１ａ 底面
７２ ネジ孔
７３ 切り削ぎ部
７４ スリット 5 Bending operation lever 7 Rotating shaft 8 Countersunk screw 51 Seat plate 52 Center slit 53 Countersink 54 Reinforcing arm 55 Side slit 56 Fitting wall 71 Concave groove 71a Bottom surface 72 Screw hole 73 Cutting part 74 Slit

Claims (11)

内視鏡の操作部に設けられた回転軸の突端部に操作レバーがビス止めにより連結固定された内視鏡の操作レバーの連結固定構造において、
上記回転軸の突端面に凹溝を形成すると共にその凹溝の底面にネジ孔を形成し、
上記操作レバーの基端部分には上記凹溝内に嵌まり込む幅の座板を形成して、上記座板を基端まで半幅に分割するスリットと、中心軸線が上記スリットを通過する皿孔とを上記座板に形成し、
上記凹溝を底側へ次第に幅が広がった台形状の断面形状に形成して、上記座板の断面形状も上記凹溝の断面形状に対応する台形状の断面形状に形成し、
上記皿孔の形状に対応する皿状の頭部を有する皿ビスを上記皿孔側から上記ネジ孔に締め込むことにより、上記スリットの幅が押し広げられる状態に上記座板が弾性変形して、上記座板の側壁外面が上記回転軸の凹溝の側壁内面に圧接された状態になって、上記操作レバーが上記回転軸に固定されるようにしたことを特徴とする内視鏡の操作レバーの連結固定構造。 In the connecting and fixing structure of the operating lever of the endoscope in which the operating lever is connected and fixed to the protruding end portion of the rotating shaft provided in the operating portion of the endoscope by screws.
Forming a groove on the projecting end surface of the rotating shaft and forming a screw hole on the bottom surface of the groove;
The base end portion of the operating lever is formed with a seat plate having a width that fits into the concave groove, and a slit that divides the seat plate into a half width up to the base end, and a countersink with a central axis passing through the slit. Are formed on the seat plate,
The concave groove is formed into a trapezoidal cross-sectional shape that gradually widens to the bottom side, and the cross-sectional shape of the seat plate is also formed into a trapezoidal cross-sectional shape corresponding to the cross-sectional shape of the concave groove,
By tightening a countersunk screw having a countersunk head corresponding to the shape of the countersink into the screw hole from the countersink side, the seat plate elastically deforms in a state where the width of the slit is expanded. The operation of the endoscope, wherein the outer surface of the side wall of the seat plate is in pressure contact with the inner surface of the side wall of the concave groove of the rotating shaft so that the operating lever is fixed to the rotating shaft. Lever connecting and fixing structure. 上記ネジ孔が上記凹溝に沿った方向の中心線位置に複数形成されている請求項１記載の内視鏡の操作レバーの連結固定構造。 Coupling structure for fixing the screw hole the operating lever of the endoscope according to claim 1 Symbol placement are formed in a plurality of numbers in the center line position in a direction along said grooves. 上記操作レバー側に、上記回転軸を挟み込むフォーク状の一対の補強腕が形成されている請求項１又は２記載の内視鏡の操作レバーの連結固定構造。 The endoscope operation lever connecting and fixing structure according to claim 1 or 2, wherein a pair of fork-shaped reinforcing arms sandwiching the rotation shaft is formed on the operation lever side. 上記座板を半幅に分割するスリットと平行に、上記補強腕の付け根側から上記操作レバーを分割するスリットが形成されている請求項３記載の内視鏡の操作レバーの連結固定構造。 The endoscope operation lever connecting and fixing structure according to claim 3, wherein a slit for dividing the operation lever from the base side of the reinforcing arm is formed in parallel with the slit for dividing the seat plate into half widths. 上記補強腕の内壁面が、上記回転軸の外周面に嵌合する円弧状に形成されている請求項３又は４記載の内視鏡の操作レバーの連結固定構造。 5. An endoscope operation lever connecting and fixing structure according to claim 3 or 4 , wherein an inner wall surface of the reinforcing arm is formed in an arc shape that fits to an outer peripheral surface of the rotating shaft. 上記回転軸の外縁の断面形状が円形状に形成されている請求項３、４又は５のいずれかの項に記載の内視鏡の操作レバーの連結固定構造。 6. The connecting and fixing structure for an operation lever of an endoscope according to claim 3, wherein a cross-sectional shape of an outer edge of the rotating shaft is formed in a circular shape. 上記回転軸の外周面の上記補強腕が当接する部分が平面状に切り削がれている請求項６記載の内視鏡の操作レバーの連結固定構造。 7. The connecting and fixing structure for an operation lever of an endoscope according to claim 6, wherein a portion of the outer peripheral surface of the rotating shaft that comes into contact with the reinforcing arm is cut into a flat shape. 上記回転軸の外縁の断面形状が矩形状に形成されている請求項３、４又は５記載の内視鏡の操作レバーの連結固定構造。 6. The connecting / fixing structure for an operation lever of an endoscope according to claim 3, wherein a cross-sectional shape of an outer edge of the rotating shaft is formed in a rectangular shape. 上記操作レバー側に、上記回転軸の外周面に嵌合する嵌合壁が形成されている請求項１ないし８のいずれかの項に記載の内視鏡の操作レバーの連結固定構造。 The connecting and fixing structure for an operation lever of an endoscope according to any one of claims 1 to 8 , wherein a fitting wall that is fitted to an outer peripheral surface of the rotary shaft is formed on the operation lever side. 上記嵌合壁が上記座板に形成されている請求項９記載の内視鏡の操作レバーの連結固定構造。 The connection fixing structure of the operation lever of the endoscope according to claim 9, wherein the fitting wall is formed on the seat plate. 上記凹溝の底面の幅方向の両端位置から上記回転軸の軸線と平行方向に上記回転軸を分割するスリットが形成されている請求項１ないし１０のいずれかの項に記載の内視鏡の操作レバーの連結固定構造。
The endoscope according to any one of claims 1 to 10 , wherein slits are formed to divide the rotary shaft in parallel to the axis of the rotary shaft from both end positions in the width direction of the bottom surface of the concave groove. Connecting and fixing structure of operation lever.
JP2005358387A 2005-12-13 2005-12-13 Endoscope operation lever connection and fixing structure Expired - Fee Related JP4827514B2 (en)

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