JP2009112537A - Flexible endoscope - Google Patents

Flexible endoscope Download PDF

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JP2009112537A
JP2009112537A JP2007289161A JP2007289161A JP2009112537A JP 2009112537 A JP2009112537 A JP 2009112537A JP 2007289161 A JP2007289161 A JP 2007289161A JP 2007289161 A JP2007289161 A JP 2007289161A JP 2009112537 A JP2009112537 A JP 2009112537A
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shape
wire
flexible
bent
tube
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Yuichi Oshima
有一 大島
Shigeru Ichikura
繁 市倉
Toru Komoto
徹 向本
Tetsuya Nakamura
哲也 中村
Hirohisa Ueda
裕久 植田
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Hoya Corp
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Hoya Corp
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064Constructional details of the endoscope body
    • A61B1/00071Insertion part of the endoscope body
    • A61B1/00078Insertion part of the endoscope body with stiffening means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005Flexible endoscopes
    • A61B1/0051Flexible endoscopes with controlled bending of insertion part
    • A61B1/0055Constructional details of insertion parts, e.g. vertebral elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005Flexible endoscopes
    • A61B1/0051Flexible endoscopes with controlled bending of insertion part
    • A61B1/0057Constructional details of force transmission elements, e.g. control wires
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133Tip steering devices
    • A61M25/0138Tip steering devices having flexible regions as a result of weakened outer material, e.g. slots, slits, cuts, joints or coils
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133Tip steering devices
    • A61M25/0147Tip steering devices with movable mechanical means, e.g. pull wires

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible endoscope capable of applying a bending state retaining function of prescribed strength to a desired range of a flexible insertion part, and capable of easily and securely changing the state to a state in which the endoscope is passively deformed with the external force or to a state in which the bending shape at any optional time can be stably held. <P>SOLUTION: A plurality of joint rings 7 are connected in series, and by drawing a shape-retaining operation wire 15 passing through a wire guide hole 91 bored in each joint ring 7 from the proximal end side, the friction resistance between the shape-retaining operation wire 15 and the wire guide hole 91 increases, so that the bending shape of a bending shape retainable part 11 is retained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、挿入部が可撓性を有する可撓性内視鏡に関する。   The present invention relates to a flexible endoscope in which an insertion portion has flexibility.

胆嚢摘出等のような腹腔内の手術は、以前は腹部を切開するいわゆる開腹手術により行われていたが、近年は、腹部に数cm程度の孔を幾つかあけて、そこから硬性内視鏡である腹腔鏡や手術用の処置具等を挿入して処置をする腹腔鏡下手術が広く一般に行われている。しかし、そのような腹腔鏡下手術であっても、手術を受けた患者の回復には一定以上の時間がかかるうえ、小さいとはいえ患者の体表に傷が残る。   Intra-abdominal surgery such as cholecystectomy was previously performed by so-called laparotomy in which the abdomen is incised. Recently, a few centimeters of holes are made in the abdomen, and then a rigid endoscope is used. Laparoscopic surgery in which treatment is performed by inserting a laparoscope, a surgical treatment tool, or the like is widely performed. However, even in such a laparoscopic operation, it takes a certain amount of time for the patient who has undergone the operation to recover, and even though it is small, a wound remains on the patient's body surface.

そこで、可撓性内視鏡を口から胃内に挿入し、その可撓性内視鏡の処置具挿通チャンネルに通した処置具で胃壁に孔をあけてそこから経内視鏡的に(即ち、内視鏡の処置具挿通チャンネルを通じて)腹腔内の手術を行う技術が注目されている。胃壁にあけられた孔は、手術終了後に内視鏡用クリップで閉じられる。   Therefore, a flexible endoscope is inserted into the stomach through the mouth, and a hole is made in the stomach wall with a treatment instrument passed through the treatment instrument insertion channel of the flexible endoscope, and then transendoscopically ( That is, a technique for performing intra-abdominal surgery (through a treatment instrument insertion channel of an endoscope) has attracted attention. The hole made in the stomach wall is closed with an endoscopic clip after the operation is completed.

ただし、可撓性内視鏡の挿入部は手術中に先端の姿勢や向きを長時間にわたって安定させることが困難であり、内視鏡手術中の挿入部先端の姿勢や向きが術者の意に反して変化すると、経内視鏡的腹腔内手術を円滑に行うことができない。   However, it is difficult to stabilize the posture and orientation of the distal end of the flexible endoscope during surgery for a long time, and the posture and orientation of the distal end of the insertion portion during endoscopic surgery are intended by the operator. On the contrary, transendoscopic intraperitoneal surgery cannot be performed smoothly.

そこで、可撓性挿入部に、屈曲形状が受動的に形状変化自在な状態と、任意の時点の屈曲形状をそのまま保持することができる状態とを切り換える機能を付与して、内視鏡手術中の可撓性挿入部の先端の姿勢や向きを術者の意思通りに制御できるようにすることが考えられる(例えば、特許文献1)。
特開2005−46279
Therefore, the flexible insertion portion is provided with a function of switching between a state in which the bent shape can be passively changed and a state in which the bent shape at an arbitrary time can be maintained as it is, during endoscopic surgery. It may be possible to control the posture and orientation of the distal end of the flexible insertion portion as intended by the operator (for example, Patent Document 1).
JP-A-2005-46279

特許文献1に記載された従来の可撓性内視鏡においては、帯状部材を一定の径で螺旋状に巻いて形成された二つの螺旋管が径方向に重ね合わされて挿入部可撓管内に配置されていて、内側の螺旋管を径が大きくなる方向に基端側から軸線周り方向に回転操作することにより、二つの螺旋管の間に摩擦力を発生させて屈曲形状保持機能が得られるようにしている。   In the conventional flexible endoscope described in Patent Document 1, two spiral tubes formed by spirally winding a band-shaped member with a constant diameter are overlapped in the radial direction to be inserted into the insertion portion flexible tube. By arranging the inner spiral tube to rotate in the direction of increasing the diameter from the base end side in the direction around the axis line, the friction force is generated between the two spiral tubes to obtain the bent shape maintaining function. I am doing so.

しかし、そのような構成では、一方の螺旋管を基端側から軸線周り方向に回転させた時にその螺旋管の径が基端側寄りの領域ではすぐに大きくなるものの、先端に近い領域ほど径の広がりが少なくなって十分な屈曲形状保持機能を得難く、特に最先端近傍部分では二つの螺旋管の間に殆ど圧接力が発生しないので、満足な屈曲形状保持機能が得られない問題があった。   However, in such a configuration, when one spiral tube is rotated from the proximal side to the axial direction, the diameter of the spiral tube immediately increases in the region closer to the proximal side, but the region closer to the distal end has a diameter. It is difficult to obtain a sufficient bent shape holding function due to the decrease in the spread of the sheet, and in particular, there is a problem that a satisfactory bent shape holding function cannot be obtained because there is almost no pressure contact force between the two spiral tubes in the vicinity of the most advanced part. It was.

本発明は、可撓性挿入部の所望の範囲に所望の強さの屈曲形状保持機能を付与することができて、外力により受動的に形状変化する状態と、任意の時点における屈曲形状を安定して保持することができる状態とを確実かつ容易に切り換えることができる可撓性内視鏡を提供することを目的とする。   The present invention can provide a bent shape holding function having a desired strength within a desired range of the flexible insertion portion, and can stably stabilize the bent shape at any point in time when the shape is passively changed by an external force. It is an object of the present invention to provide a flexible endoscope that can reliably and easily switch between a state that can be held and held.

上記の目的を達成するため、本発明の可撓性内視鏡は、可撓性挿入部の一部又は全部に、複数の短筒状の関節輪が各々隣接する関節輪と相対的に回動自在に連結軸で直列に連結されて全体としてあらゆる方向に屈曲自在に構成された骨組みを有する屈曲形状保持可能管部が設けられ、屈曲形状保持可能管部の先端部分には可撓性を有する少なくとも3本の形状保持用操作ワイヤの先端が連結されて、各関節輪に設けられたワイヤガイド孔内に形状保持用操作ワイヤが挿通され、ワイヤガイド孔は、そこに挿通された形状保持用操作ワイヤが緩く通過する径であって、形状保持用操作ワイヤに加わる張力が大きくなるのにしたがって形状保持用操作ワイヤとの間の摩擦抵抗が増大する湾曲した形状に形成され、その結果、各形状保持用操作ワイヤが基端側から牽引されていない状態では屈曲形状保持可能管部が受動的に形状変化自在であって、全ての形状保持用操作ワイヤが基端側から牽引されると、それによって全ての形状保持用操作ワイヤに加わる張力の増大に対応して各形状保持用操作ワイヤとワイヤガイド孔との間の摩擦抵抗が増大することにより、屈曲形状保持可能管部の屈曲形状が保持されるようにしたものである。   In order to achieve the above object, the flexible endoscope of the present invention is configured such that a plurality of short cylindrical joint rings rotate relative to adjacent joint rings in part or all of the flexible insertion portion. A flexible shape-maintainable tube portion having a framework that is connected in series with a connecting shaft so as to be freely movable in all directions as a whole is provided, and the distal end portion of the bent shape-maintainable tube portion is flexible. The tips of at least three shape-retaining operation wires are connected to each other, and the shape-retaining operation wires are inserted into the wire guide holes provided in the respective joint rings, and the wire guide holes are retained there. The diameter of the operation wire for loose passage is formed into a curved shape in which the frictional resistance with the shape holding operation wire increases as the tension applied to the shape holding operation wire increases. Each shape retention operation Y In the state where the tube is not pulled from the base end side, the shape of the bendable tube can be passively changed, and when all the shape holding operation wires are pulled from the base end side, all the shapes are Corresponding to the increase in tension applied to the holding operation wire, the frictional resistance between each shape holding operation wire and the wire guide hole is increased, so that the bent shape of the bendable shape can be held. It is a thing.

なお、ワイヤガイド孔が略くの字状に曲がった形状に形成されていてもよく、可撓性挿入部の屈曲形状保持可能管部より先端寄りの位置に、可撓性挿入部の基端側からの遠隔操作により屈曲する湾曲部が設けられていてもよい。   In addition, the wire guide hole may be formed in a substantially bent shape, and the proximal end of the flexible insertion portion is positioned closer to the distal end than the bendable tube holding portion of the flexible insertion portion. A bending portion that bends by remote operation from the side may be provided.

また、可撓性挿入部の基端側に操作部が連結されて、各形状保持用操作ワイヤの基端部分が屈曲形状保持可能管部の屈曲状態に追随して軸線方向に進退するように操作部に配置されると共に、全ての形状保持用操作ワイヤの基端部分を一緒に牽引操作するためのワイヤ牽引操作装置が操作部に設けられていてもよい。そして、操作部に、全ての形状保持用操作ワイヤの張力を均一化するためのワイヤ張力調整手段が設けられていてもよい。   In addition, the operation portion is connected to the proximal end side of the flexible insertion portion so that the proximal end portion of each shape holding operation wire advances and retracts in the axial direction following the bent state of the bent shape holdable tube portion. A wire pulling operation device for pulling the base end portions of all the shape-maintaining operation wires together may be provided in the operation unit. And the wire tension adjustment means for equalizing the tension | tensile_strength of all the shape maintenance operation wires may be provided in the operation part.

そのワイヤ張力調整手段は、全ての形状保持用操作ワイヤの中の一部の形状保持用操作ワイヤの基端が係合する第1のワイヤ係合部材と他の形状保持用操作ワイヤの基端が係合する第2のワイヤ係合部材との軸線方向位置関係を調整するものであってもよい。   The wire tension adjusting means includes a first wire engaging member that engages a proximal end of a part of the shape-retaining operation wires, and a proximal end of another shape-retaining operation wire. The positional relationship in the axial direction with the second wire engaging member with which the is engaged may be adjusted.

また、可撓性挿入部の屈曲形状保持可能管部より先端寄りの位置に、可撓性挿入部の基端側からの遠隔操作により屈曲する湾曲部が設けられて、湾曲部を遠隔操作により屈曲させるための湾曲操作装置が操作部に設けられていてもよい。   In addition, a bending portion that is bent by a remote operation from the proximal end side of the flexible insertion portion is provided at a position closer to the distal end than the tube portion capable of maintaining the bent shape of the flexible insertion portion. A bending operation device for bending may be provided in the operation unit.

また、少なくとも3本の形状保持用操作ワイヤが、屈曲形状保持可能管部の軸線周りに180°以上の間隔があかない位置関係で互いの間に間隔をあけて配置されていてもよく、形状保持用操作ワイヤとして、4本の形状保持用操作ワイヤが、屈曲形状保持可能管部の軸線周りに略90°間隔で配置されていてもよい。   In addition, at least three shape-maintaining operation wires may be arranged at intervals between each other in a positional relationship where there is no interval of 180 ° or more around the axis of the bent shape-maintainable tube portion. As the holding operation wires, four shape holding operation wires may be arranged at intervals of approximately 90 ° around the axis of the bent shape holding tube.

そして、可撓性挿入部の屈曲形状保持可能管部より基端寄りの部分が、外力により受動的に形状変化自在であって形状保持性のない可撓管部になっていてもよく、可撓管部内に、各形状保持用操作ワイヤを軸線方向に進退自在にガイドする可撓性のガイドパイプが配置されていてもよい。   The portion of the flexible insertion portion closer to the base end than the bent shape-maintainable tube portion may be a flexible tube portion that is passively changeable in shape by an external force and has no shape retainability. A flexible guide pipe that guides each shape-maintaining operation wire so as to advance and retreat in the axial direction may be disposed in the flexible tube portion.

本発明によれば、各関節輪に設けられたワイヤガイド孔の中を通過する形状保持用操作ワイヤを基端側から牽引することにより、形状保持用操作ワイヤとワイヤガイド孔との間の摩擦抵抗が増大して、屈曲形状保持可能管部の屈曲形状が保持されるので、ワイヤガイド孔の形状等を適宜設定することにより、可撓性挿入部の所望の範囲に所望の強さの屈曲形状保持機能を付与することができて、外力により受動的に形状変化する状態と、任意の時点における屈曲形状を安定して保持することができる状態とを確実かつ容易に切り換えることができる。   According to the present invention, the friction between the shape holding operation wire and the wire guide hole is obtained by pulling the shape holding operation wire passing through the wire guide hole provided in each joint ring from the proximal end side. Since the resistance increases and the bent shape of the bendable shape can be maintained, it is possible to bend the desired strength of the flexible insertion portion within the desired range by appropriately setting the shape of the wire guide hole. A shape maintaining function can be provided, and a state in which the shape is passively changed by an external force and a state in which the bent shape at an arbitrary time can be stably held can be switched reliably and easily.

可撓性挿入部の一部又は全部に、複数の短筒状の関節輪が各々隣接する関節輪と相対的に回動自在に連結軸で直列に連結されて全体としてあらゆる方向に屈曲自在に構成された骨組みを有する屈曲形状保持可能管部が設けられ、屈曲形状保持可能管部の先端部分には可撓性を有する少なくとも3本の形状保持用操作ワイヤの先端が連結されて、各関節輪に設けられたワイヤガイド孔内に形状保持用操作ワイヤが挿通され、ワイヤガイド孔は、そこに挿通された形状保持用操作ワイヤが緩く通過する径であって、形状保持用操作ワイヤに加わる張力が大きくなるのにしたがって形状保持用操作ワイヤとの間の摩擦抵抗が増大する湾曲した形状に形成され、その結果、各形状保持用操作ワイヤが基端側から牽引されていない状態では屈曲形状保持可能管部が受動的に形状変化自在であって、全ての形状保持用操作ワイヤが基端側から牽引されると、それによって全ての形状保持用操作ワイヤに加わる張力の増大に対応して各形状保持用操作ワイヤとワイヤガイド孔との間の摩擦抵抗が増大することにより、屈曲形状保持可能管部の屈曲形状が保持される。   A plurality of short cylindrical articulation rings are connected in series with a connecting shaft so as to be rotatable relative to adjacent articulation rings in part or all of the flexible insertion portion, and can be bent in all directions as a whole. Each of the joints is provided with a bent shape-maintainable tube portion having a structured frame, and the distal ends of the bent shape-maintainable tube portions are connected with distal ends of at least three flexible shape-maintaining operation wires. A shape-maintaining operation wire is inserted into a wire guide hole provided in the ring, and the wire guide hole has a diameter through which the shape-maintaining operation wire inserted therein passes loosely and is added to the shape-maintaining operation wire. As the tension increases, it is formed into a curved shape that increases the frictional resistance with the shape holding operation wire. As a result, each shape holding operation wire is bent when it is not pulled from the proximal side. Retention When the active tube part is passively changeable in shape and all the shape-holding operation wires are pulled from the proximal side, each shape corresponds to the increase in tension applied to all the shape-holding operation wires. By increasing the frictional resistance between the holding operating wire and the wire guide hole, the bent shape of the bent shape holdable tube portion is held.

以下、図面を参照して本発明の実施例を説明する。
図3は、本発明の実施例の可撓性内視鏡の全体構成を示しており、可撓性内視鏡は、全体としてあらゆる方向に屈曲自在で体腔内に挿脱自在な可撓性挿入部1と、可撓性挿入部1の基端に連結された操作部2とで構成されている。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 3 shows an overall configuration of a flexible endoscope according to an embodiment of the present invention. The flexible endoscope is flexible so that it can be bent in any direction and can be inserted into and removed from a body cavity as a whole. The insertion portion 1 and the operation portion 2 connected to the proximal end of the flexible insertion portion 1 are configured.

可撓性挿入部1の基端と操作部2との連結部には、可撓性挿入部1の基端付近が急激に曲がって座屈するのを防止するために、先細りのテーパ筒体状に形成された弾力性のあるゴム材等からなる折れ止め3が取り付けられている。   The connecting portion between the base end of the flexible insertion portion 1 and the operation portion 2 has a tapered tapered cylindrical shape in order to prevent the vicinity of the base end of the flexible insertion portion 1 from being bent suddenly and buckled. A crease stopper 3 made of an elastic rubber material or the like formed on is attached.

可撓性挿入部1の先端寄りの部分は、操作部2からの遠隔操作により任意の方向に任意の角度だけ屈曲させることができる湾曲部13になっている。6は、その操作のために操作部2に配置された湾曲操作ノブである。   A portion near the tip of the flexible insertion portion 1 is a bending portion 13 that can be bent at an arbitrary angle in an arbitrary direction by a remote operation from the operation portion 2. Reference numeral 6 denotes a bending operation knob disposed in the operation unit 2 for the operation.

可撓性挿入部1の基端寄りの部分はあらゆる方向に屈曲自在な可撓管部12になっていて、可撓管部12と湾曲部13との間の可撓性挿入部1の中間領域は、やはりあらゆる方向に屈曲自在な屈曲形状保持可能管部11になっている。   A portion near the base end of the flexible insertion portion 1 is a flexible tube portion 12 that can be bent in any direction, and an intermediate portion of the flexible insertion portion 1 between the flexible tube portion 12 and the bending portion 13. The region is a bent shape-maintainable tube portion 11 that can be bent in any direction.

屈曲形状保持可能管部11と可撓管部12との相違は、屈曲形状保持可能管部11は屈曲した形状を操作部2に配置されている操作用雌ねじ環5(ワイヤ牽引操作装置)の操作で保持することができるが、可撓管部12は屈曲した形状を保持することができない点であり、その点については詳細に後述する。   The difference between the bent shape-maintainable tube portion 11 and the flexible tube portion 12 is that the bent shape-maintainable tube portion 11 is different from the operation female screw ring 5 (wire pulling operation device) in which the bent shape is arranged in the operation portion 2. Although it can hold | maintain by operation, the flexible tube part 12 is a point which cannot hold | maintain the bent shape, and the point is mentioned later in detail.

なお、可撓性内視鏡の用途や手技等に応じ、可撓管部12は必ずしも設けなくてもよい。その場合、可撓性挿入部1のうち湾曲部13を除く全領域が屈曲形状保持可能管部11になる。また、屈曲形状保持可能管部11と可撓管部12との間や可撓管部12の手元側等に硬質部又は半硬質部等があってもよい。また、湾曲部13が必要ない手技の場合には湾曲部13を省いてもよい。   Note that the flexible tube portion 12 does not necessarily have to be provided depending on the use or procedure of the flexible endoscope. In that case, the entire region of the flexible insertion portion 1 except the bending portion 13 becomes the bent shape-maintainable tube portion 11. Further, a rigid portion or a semi-rigid portion may be provided between the bent shape-maintainable tube portion 11 and the flexible tube portion 12 or on the proximal side of the flexible tube portion 12. In the case of a procedure that does not require the bending portion 13, the bending portion 13 may be omitted.

可撓性挿入部1内には、図示されていない処置具等を挿通自在な可撓性の処置具挿通チャンネル4が全長にわたって軸線位置付近に挿通配置されており、処置具挿通チャンネル4の入口開口4aは操作部2の下端部付近に配置され、可撓性挿入部1の最先端に設けられた先端部本体10の先端面に処置具挿通チャンネル4の出口開口4bが配置されている。   In the flexible insertion portion 1, a flexible treatment instrument insertion channel 4 through which a treatment instrument (not shown) can be inserted is inserted in the vicinity of the axial position over the entire length, and the entrance of the treatment instrument insertion channel 4 is provided. The opening 4 a is disposed near the lower end of the operation unit 2, and the outlet opening 4 b of the treatment instrument insertion channel 4 is disposed on the distal end surface of the distal end main body 10 provided at the forefront of the flexible insertion unit 1.

その結果、入口開口4aから処置具挿通チャンネル4内に図示されていない処置具を差し込んで、その処置具の先端部分を出口開口4bから前方に任意に突没させることができる。   As a result, a treatment tool (not shown) can be inserted into the treatment tool insertion channel 4 from the inlet opening 4a, and the distal end portion of the treatment tool can be arbitrarily projected forward from the outlet opening 4b.

図4は可撓性挿入部1の構成を示している。先端部本体10は、金属又は硬質プラスチック材等により略円柱状に形成されて湾曲部13の先端部分に連結され、そこに観察窓14や図示されていない照明窓及び送気送水ノズル等が配置されている。   FIG. 4 shows the configuration of the flexible insertion portion 1. The tip body 10 is formed in a substantially cylindrical shape by a metal or a hard plastic material and connected to the tip portion of the curved portion 13, and an observation window 14, an illumination window (not shown), an air / water feed nozzle, and the like are arranged there. Has been.

また、処置具挿通チャンネル4の殆どの部分を形成する例えば四フッ化エチレン樹脂チューブ等からなる可撓性チューブの先端部分が、先端部本体10に後方から水密に接合固着されている。可撓性チューブは、その中に挿通された処置具と共に柔軟に屈曲することができる。   Further, a distal end portion of a flexible tube made of, for example, a tetrafluoroethylene resin tube or the like that forms most of the treatment instrument insertion channel 4 is bonded and fixed to the distal end portion body 10 from the rear in a watertight manner. The flexible tube can be flexibly bent together with the treatment instrument inserted therein.

処置具挿通チャンネル4は、図4では最先端部付近を除いて図示が省略されている。しかし、処置具挿通チャンネル4を形成する可撓性チューブは、可撓性挿入部1内の全長にわたって挿通配置されていて、その基端は操作部2内に位置している。   The treatment instrument insertion channel 4 is not shown in FIG. 4 except for the vicinity of the most distal portion. However, the flexible tube forming the treatment instrument insertion channel 4 is inserted through the entire length of the flexible insertion portion 1, and the base end thereof is located in the operation portion 2.

なお、処置具挿通チャンネル4を形成する可撓性チューブの耐座屈性を向上させるために、図5に例示されるように、可撓性チューブの外周に形成した螺旋溝4cに沿ってコイルスプリング4dを巻回する等の補強構造を採ってもよい。   In order to improve the buckling resistance of the flexible tube forming the treatment instrument insertion channel 4, a coil is formed along the spiral groove 4c formed on the outer periphery of the flexible tube as illustrated in FIG. A reinforcing structure such as winding the spring 4d may be employed.

図4に戻って、湾曲部13は公知の構成であり、例えば複数の(例えば5〜50個程度の)短筒状の関節輪37が、各関節輪37から前後双方向に突出する舌片部分において、隣接する関節輪37と相対的に回動自在に連結軸38で直列に連結されて、全体としてあらゆる方向に屈曲自在に構成された骨組みを有している。ただし、骨組みがその他の構成であっても差し支えない。   Returning to FIG. 4, the bending portion 13 has a known configuration. For example, a plurality of (for example, about 5 to 50) short cylindrical joint rings 37 project from each joint ring 37 in both the front and rear directions. In the portion, it is connected in series with a connecting shaft 38 so as to be rotatable relative to the adjacent joint ring 37, and has a skeleton that can be bent in all directions as a whole. However, the skeleton may have other configurations.

湾曲部13の最先端の関節輪37Aの内周部には、可撓性を有するステンレス鋼撚り線等からなる4本の湾曲操作ワイヤ35の先端が90°間隔で固定的に連結され、湾曲部13内においては各関節輪37の内周部に設けられたワイヤガイド39内を、各湾曲操作ワイヤ35が緩く通過している。   The distal ends of four bending operation wires 35 made of a flexible stainless steel stranded wire or the like are fixedly connected at 90 ° intervals to the inner peripheral portion of the most advanced joint ring 37A of the bending portion 13 to bend. In the portion 13, each bending operation wire 35 loosely passes through a wire guide 39 provided on the inner peripheral portion of each joint ring 37.

湾曲部13と屈曲形状保持可能管部11との境界部には、湾曲操作ワイヤ35を案内するためのガイドコイル40の先端部分が固定されている。ガイドコイル40は、先端部分以外が固定されることなく可撓性挿入部1内を通過して、その基端部分は操作部2に固定されている。   A distal end portion of a guide coil 40 for guiding the bending operation wire 35 is fixed to a boundary portion between the bending portion 13 and the bent shape-maintainable tube portion 11. The guide coil 40 passes through the flexible insertion portion 1 without being fixed except for the distal end portion, and the base end portion is fixed to the operation portion 2.

屈曲形状保持可能管部11は、複数の(例えば10〜100個程度の)短筒状の関節輪7が、各関節輪7から前後双方向に突出する舌片部分において、隣接する関節輪7と相対的に回動自在に連結軸8で直列に連結されて、全体としてあらゆる方向に屈曲自在に構成された骨組みを有している。関節輪7は肉厚が0.3〜0.4mm程度あれば足りるので、外径を細く構成することができる。   The bent shape-maintainable tube portion 11 includes a plurality of (for example, about 10 to 100) short cylindrical joint rings 7 that are adjacent to each other in the tongue piece portion in which the joint rings 7 protrude in the front-rear direction. Are connected in series by a connecting shaft 8 so as to be rotatable relative to each other, and as a whole, has a framework that can be bent in any direction. Since the articulation ring 7 only needs to have a thickness of about 0.3 to 0.4 mm, the outer diameter can be reduced.

図6には、そのような屈曲形状保持可能管部11の骨組みが最大限に屈曲した状態が例示されており、そのような構成と機能は一般的な内視鏡の湾曲部の骨組みと同様であり、各関節輪7の前後位置において連結軸8の配置が90°ずつ変化している。ただし、それ以外の角度変化(例えば60°等)であっても差し支えない。   FIG. 6 illustrates a state in which the framework of such a bent shape-maintainable tube portion 11 is bent to the maximum extent, and such a configuration and function are the same as those of a curved portion of a general endoscope. The arrangement of the connecting shaft 8 changes by 90 ° at the front and rear positions of each joint ring 7. However, other angle changes (for example, 60 °, etc.) may be used.

再び図4に戻って、屈曲形状保持可能管部11の最先端の関節輪7Aの内周部には、可撓性を有する形状保持用操作ワイヤ15の先端が固定的に連結されている。形状保持用操作ワイヤ15としては、一般的な内視鏡の湾曲操作ワイヤ等と同様のロープ状のステンレス鋼撚り線等を用いることができ、耐久性向上のために表面コーティング等を施したものであってもよい。   Returning to FIG. 4 again, the distal end of a flexible shape-retaining operation wire 15 is fixedly connected to the inner peripheral portion of the most advanced joint ring 7A of the bent-shape-retainable tube portion 11. As the shape maintaining operation wire 15, a rope-like stainless steel stranded wire or the like similar to a bending operation wire of a general endoscope can be used, and a surface coating or the like is applied to improve durability. It may be.

この実施例の屈曲形状保持可能管部11内には、4本の形状保持用操作ワイヤ15が、図4におけるVII−VII断面を図示する図7に示されるように、軸線周りに略90°間隔で配置されて、各関節輪7の内周部から内方に突出して配置されたワイヤガイド9のワイヤガイド孔91内に通されて案内されている。なお、図7においては、処置具挿通チャンネル4や信号ケーブル、配管チューブ等の各種内蔵物の図示が省略されている。   In the bent shape-maintainable tube portion 11 of this embodiment, four shape-maintaining operation wires 15 are arranged at approximately 90 ° around the axis as shown in FIG. 7 showing a VII-VII cross section in FIG. They are arranged at intervals and guided through the wire guide holes 91 of the wire guides 9 arranged to project inward from the inner peripheral portion of each joint ring 7. In FIG. 7, illustration of various built-in items such as the treatment instrument insertion channel 4, the signal cable, and the piping tube is omitted.

図8に示されるように、ワイヤガイド9は、連結軸8を通すために各関節輪7に穿設された連結軸孔71の位置に対応して、各関節輪7の内周部毎に90°間隔で4個取り付けられている。92は、各ワイヤガイド9から突出形成され、関節輪7の取り付け孔に差し込まれてそこに機械的に固定された取り付け足である。   As shown in FIG. 8, the wire guide 9 is provided for each inner peripheral portion of each joint ring 7 in accordance with the position of the connection shaft hole 71 formed in each joint ring 7 for passing the connection shaft 8. Four are attached at intervals of 90 °. Reference numeral 92 denotes a mounting foot which is formed so as to protrude from each wire guide 9 and is inserted into the mounting hole of the joint ring 7 and mechanically fixed thereto.

ワイヤガイド9に前後方向に貫通形成されたワイヤガイド孔91は、この実施例においては、図4及びその部分拡大図である図1に示されるように、前後両端部分が屈曲形状保持可能管部11の軸線寄りに位置して中間部分がそれより外周寄りに位置する状態に、屈曲形状保持可能管部11の軸線を含む平面上において略「く」の字状に曲がった形状に形成されている。   In this embodiment, the wire guide hole 91 penetratingly formed in the wire guide 9 in the front-rear direction is, as shown in FIG. 4 and FIG. 11 is formed in a shape bent in a substantially “<” shape on a plane including the axis of the bendable shape-maintainable tube portion 11 in a state where the intermediate portion is positioned closer to the outer periphery than the axial line of the bent portion 11. Yes.

ワイヤガイド孔91は、全長にわたって形状保持用操作ワイヤ15が緩く通過する内径寸法に形成されているが、図9及びその部分拡大図である図2に示されるように、形状保持用操作ワイヤ15が基端側から牽引されて張力により真っ直ぐな状態になろうとしても真っ直ぐになれない程度にカーブしている。   The wire guide hole 91 is formed to have an inner diameter through which the shape-maintaining operation wire 15 passes loosely over its entire length, but as shown in FIG. 9 and FIG. 2 which is a partially enlarged view thereof, the shape-maintaining operation wire 15. Is curved to such an extent that it cannot be straightened even if it is pulled straight from the base end and becomes straight due to tension.

言い換えると、各ワイヤガイド孔91は、可撓性のある形状保持用操作ワイヤ15ならワイヤガイド孔91の湾曲形状に沿って曲がりながら通過するが、形状保持用操作ワイヤ15と同径の硬質パイプは通過できない程度に湾曲した形状に形成されている。   In other words, each wire guide hole 91 passes while bending along the curved shape of the wire guide hole 91 if it is a flexible shape-maintaining operation wire 15, but a hard pipe having the same diameter as the shape-maintaining operation wire 15. Is formed in a curved shape so that it cannot pass through.

そのような構成により、4本の全ての形状保持用操作ワイヤ15が基端側から同時に牽引されると、4本の全ての形状保持用操作ワイヤ15に加わる張力の増大に対応して各形状保持用操作ワイヤ15とワイヤガイド孔91との間の摩擦抵抗が増大する。   With such a configuration, when all the four shape-retaining operation wires 15 are pulled simultaneously from the proximal end side, each shape corresponds to an increase in tension applied to all four shape-retaining operation wires 15. The frictional resistance between the holding operation wire 15 and the wire guide hole 91 increases.

なお、牽引された形状保持用操作ワイヤ15が摺接するワイヤガイド孔91の内周壁面部分は滑らかに丸められて、形状保持用操作ワイヤ15の損傷を防止している。また、この実施例のワイヤガイド孔91は、屈曲形状保持可能管部11の軸線を含む平面上で湾曲しているが、必ずしもその必要はなく、屈曲形状保持可能管部11の周方向その他の方向に湾曲していてもよい。   The inner peripheral wall surface portion of the wire guide hole 91 with which the pulled shape-maintaining operation wire 15 is slidably contacted is smoothly rounded to prevent the shape-maintaining operation wire 15 from being damaged. In addition, the wire guide hole 91 of this embodiment is curved on a plane including the axis of the bent shape-maintainable tube portion 11, but this is not necessarily required, and the circumferential direction of the bent shape-maintainable tube portion 11 is not limited. It may be curved in the direction.

屈曲形状保持可能管部11はゴムチューブ等のように柔軟で弾力性のある外皮チューブ16により水密に被覆されており、隣り合う関節輪7どうしの隙間に外皮チューブ16が挟み込まれないように、外皮チューブ16の内側には網状管19が配置されている。   The bent shape-maintainable tube portion 11 is watertightly covered with a flexible and elastic outer tube 16 such as a rubber tube or the like, so that the outer tube 16 is not sandwiched between the gaps between the adjacent joint rings 7. A mesh tube 19 is disposed inside the outer tube 16.

図4に戻って、可撓管部12は、一般的な可撓性内視鏡の挿入部と同様の構成であり、その骨組みは螺旋管18により形成されている。螺旋管18は、ステンレス鋼帯等を一定の径で螺旋状に巻いて形成されており、例えば巻方向が相違する二つの螺旋管を重ね合わせて構成されている。   Returning to FIG. 4, the flexible tube portion 12 has the same configuration as the insertion portion of a general flexible endoscope, and its framework is formed by the spiral tube 18. The spiral tube 18 is formed by spirally winding a stainless steel strip or the like with a constant diameter. For example, the spiral tube 18 is configured by overlapping two spiral tubes having different winding directions.

そして、螺旋管18の外周には伸び止めと捩じれ止め等のために網状管19が被覆され、最外層が外皮チューブ16で水密に被覆されている。ただし、螺旋管18に代えて関節輪7と同様の短筒等を連結した構成等を採用してもよく、可撓性を有するマルチルーメンチューブ等で可撓管部12を形成してもよい。   The outer periphery of the spiral tube 18 is covered with a mesh tube 19 for preventing extension and twisting, and the outermost layer is covered with the outer tube 16 in a watertight manner. However, a configuration in which a short cylinder similar to the articulation ring 7 is connected instead of the spiral tube 18 may be adopted, and the flexible tube portion 12 may be formed of a flexible multi-lumen tube or the like. .

なお、この実施例においては、湾曲部13、屈曲形状保持可能管部11及び可撓管部12が一つの外皮チューブ16(及び網状管19)で連続して被覆されているが、各部13,11,12を各々別の外皮チューブ及び網状管で被覆してもよく、可撓管部12だけを、ゴムよりやや硬質の合成樹脂チューブ等で被覆してもよい。   In this embodiment, the bending portion 13, the bent shape-maintainable tube portion 11 and the flexible tube portion 12 are continuously covered with one outer tube 16 (and the mesh tube 19). 11 and 12 may be covered with a separate outer tube and a mesh tube, or only the flexible tube portion 12 may be covered with a synthetic resin tube slightly harder than rubber.

可撓管部12内には、図4におけるX−X断面を図示する図10に示されるように、軸線位置付近に処置具挿通チャンネル4が配置されて、その周囲の内部空間に、4本の形状保持用操作ワイヤ15が可撓管部12内の全長にわたり可撓性のガイドパイプ17に通されて配置されている。なお、図10においては、処置具挿通チャンネル4やその他の各種内蔵物の図示が省略されている。   As shown in FIG. 10 illustrating the XX cross section in FIG. 4, the treatment instrument insertion channel 4 is arranged in the vicinity of the axial position in the flexible tube portion 12, and four in the surrounding internal space. The shape maintaining operation wire 15 is disposed through the flexible guide pipe 17 over the entire length of the flexible tube portion 12. In FIG. 10, the treatment instrument insertion channel 4 and other various built-in components are not shown.

各ガイドパイプ17は、例えばステンレス鋼線等のような金属線材を一定の径で密着巻きしたコイルパイプによって形成されている。ただし、軸線方向の耐圧縮性の優れた可撓性のパイプであればコイルパイプ以外でも使用可能である。   Each guide pipe 17 is formed of a coil pipe in which a metal wire such as a stainless steel wire or the like is tightly wound with a certain diameter. However, any flexible pipe that has excellent compression resistance in the axial direction can be used other than the coil pipe.

4本のガイドパイプ17の最先端部分は、屈曲形状保持可能管部11内のワイヤガイド9の配置に合わせて軸線周りに略90°間隔で、屈曲形状保持可能管部11と可撓管部12との境界部付近の内周部に固定されている。   The leading end portions of the four guide pipes 17 are arranged at approximately 90 ° intervals around the axis in accordance with the arrangement of the wire guides 9 in the bendable shape holdable tube portion 11, and bendable shape holdable tube portions 11 and flexible tube portions. 12 is fixed to the inner peripheral portion in the vicinity of the boundary portion with respect to 12.

そして、可撓管部12内に軸線と平行に配置された各ガイドパイプ17の基端は、可撓管部12の基端に連結された操作部2内に固定されて、そこから形状保持用操作ワイヤ15の基端が延出している。   And the base end of each guide pipe 17 arrange | positioned in the flexible tube part 12 in parallel with an axis line is fixed in the operation part 2 connected with the base end of the flexible tube part 12, and shape maintenance is carried out from there. The proximal end of the operation wire 15 is extended.

このように構成された可撓管部12は、周囲から受ける力や、処置具挿通チャンネル4内に挿通された可撓性内視鏡の挿入部の屈曲形状変化に対応して、屈曲形状が常に受動的に三次元的に変化自在であり、その屈曲形状を保持する特性は有していない。   The flexible tube portion 12 configured in this manner has a bent shape corresponding to the force received from the surroundings and the change in the bent shape of the insertion portion of the flexible endoscope inserted into the treatment instrument insertion channel 4. It is always passively changeable in three dimensions and does not have the characteristic of maintaining its bent shape.

図11と図12は各々屈曲形状保持可能管部11の骨組みだけを図示している。屈曲形状保持可能管部11は、図11に示されるように、形状保持用操作ワイヤ15が基端側から牽引されていない状態では屈曲形状が受動的に三次元的に変化自在であって、周囲から受ける力等で内視鏡の屈曲状態が変化するとそれに追従して、例えば2点鎖線で図示されるように受動的に屈曲形状が変化する。   FIG. 11 and FIG. 12 each illustrate only the framework of the bent shape-maintainable tube portion 11. As shown in FIG. 11, the bent shape-maintainable tube portion 11 is capable of passively changing the bent shape in a three-dimensional manner in a state where the shape-maintaining operation wire 15 is not pulled from the proximal end side, When the bending state of the endoscope changes due to the force received from the surroundings or the like, the bending shape passively changes as shown by, for example, a two-dot chain line.

そして、図12に示されるように、4本の全ての形状保持用操作ワイヤ15が基端側から同時に牽引された状態になると、4本の全ての形状保持用操作ワイヤ15に加わる張力の増大に対応して各形状保持用操作ワイヤ15とワイヤガイド孔91との間の摩擦抵抗が増大することにより、屈曲形状保持可能管部11の屈曲形状((注)屈曲角度がゼロの場合の真っ直ぐな形状も含む)が保持され、屈曲形状保持可能管部11の屈曲形状が変化しない。   Then, as shown in FIG. 12, when all the four shape holding operation wires 15 are pulled simultaneously from the proximal end side, the tension applied to all the four shape holding operation wires 15 increases. In response to the increase in the frictional resistance between each shape-holding operation wire 15 and the wire guide hole 91, the bent shape of the tube portion 11 that can hold the bent shape (Note: straight when the bending angle is zero) The bent shape of the tube portion 11 that can hold the bent shape does not change.

このように、本発明においては、各形状保持用操作ワイヤ15とワイヤガイド孔91との間の摩擦抵抗の増大により屈曲形状保持可能管部11の屈曲形状を保持することができるので、形状保持力が長手軸方向の位置によってばらつかない。   In this way, in the present invention, the bent shape of the tube portion 11 capable of holding the bent shape can be held by increasing the frictional resistance between each shape holding operation wire 15 and the wire guide hole 91. The force does not vary depending on the position in the longitudinal direction.

その結果、ワイヤガイド孔91の形状等を適宜設定することにより、可撓性挿入部1の所望の範囲に所望の強さの屈曲形状保持機能を付与することができて、外力等により受動的に形状変化する状態と、任意の時点における屈曲形状を安定して保持することができる状態とを容易に切り換えることができる。   As a result, by appropriately setting the shape and the like of the wire guide hole 91, it is possible to impart a bent shape holding function having a desired strength to a desired range of the flexible insertion portion 1, and passively by an external force or the like. It is possible to easily switch between a state in which the shape changes to a state and a state in which the bent shape at an arbitrary time can be stably maintained.

また、多数の関節輪7を直列に連結した骨組構造なので、屈曲形状保持可能管部11の重量が重くならず軽量で使い易く、且つ、容易に細径化して口から容易に挿入することができる。   In addition, since it has a frame structure in which a large number of articulation rings 7 are connected in series, the bent shape-maintainable tube portion 11 does not increase in weight, is light and easy to use, can be easily reduced in diameter, and can be easily inserted from the mouth. it can.

なお、全部の形状保持用操作ワイヤ15を基端側から牽引することで屈曲形状保持可能管部11が形状変化できないようにするためには、形状保持用操作ワイヤ15が少なくとも3本あればよい。ただし、各形状保持用操作ワイヤ15を、屈曲形状保持可能管部11の軸線周りに180°以上の間隔があかない位置関係で、互いの間に間隔をあけて配置する必要がある。   In order to prevent the shape of the bent shape-maintainable tube portion 11 from being changed by pulling all the shape-retaining operation wires 15 from the base end side, it is sufficient that at least three shape-retaining operation wires 15 are provided. . However, it is necessary to arrange the shape maintaining operation wires 15 at intervals between each other in a positional relationship in which there is no interval of 180 ° or more around the axis of the bent shape maintaining tube portion 11.

また、この実施例のように形状保持用操作ワイヤ15が4本設けられている場合にも、各形状保持用操作ワイヤ15を屈曲形状保持可能管部11の軸線周りに180°以上の間隔があかない位置関係に配置すれば、必ずしも等間隔に配置する必要はない。   Further, even when four shape-maintaining operation wires 15 are provided as in this embodiment, each shape-maintaining operation wire 15 has an interval of 180 ° or more around the axis of the tube portion 11 capable of holding the bent shape. If they are arranged in a non-existing positional relationship, it is not always necessary to arrange them at regular intervals.

図13は操作部2を略示しており、各湾曲操作ワイヤ35の基端は、湾曲操作ノブ6によって個別に回転駆動される二つのプーリ61に巻き回されており、湾曲操作ノブ6を回転操作することにより、湾曲部13を任意の方向に任意の角度だけ屈曲させることができる。62は、湾曲操作ワイヤ35の弛み吸収機能を有する公知のワイヤ繋ぎ部である。   FIG. 13 schematically shows the operation unit 2, and the proximal end of each bending operation wire 35 is wound around two pulleys 61 that are individually driven to rotate by the bending operation knob 6, and the bending operation knob 6 is rotated. By operating, the bending portion 13 can be bent at an arbitrary angle in an arbitrary direction. Reference numeral 62 denotes a known wire connecting portion having a function of absorbing the slack of the bending operation wire 35.

この実施例の操作用雌ねじ環5は操作部2の上端部に配置されていて、ガイドパイプ17の基端から延出する形状保持用操作ワイヤ15の基端部分が操作用雌ねじ環5の内側付近に達している。ガイドパイプ17の基端部分は操作部2に対し固定されている。   The operating female screw ring 5 of this embodiment is arranged at the upper end of the operating portion 2, and the base end portion of the shape-maintaining operating wire 15 extending from the base end of the guide pipe 17 is the inner side of the operating female screw ring 5. It has reached the vicinity. A base end portion of the guide pipe 17 is fixed to the operation unit 2.

図14は操作用雌ねじ環5の内部に配置された機構を示しており、図15はそのXV−XV 断面図である。ただし、図14は左半部と右半部とで異なる断面(図15におけるXIV−XIV断面) を図示している。   FIG. 14 shows a mechanism arranged inside the internal thread ring 5 for operation, and FIG. 15 is a sectional view taken along XV-XV. However, FIG. 14 illustrates different cross sections (XIV-XIV cross section in FIG. 15) in the left half and the right half.

21は、円筒状に形成されて操作部2のフレームに対し固定された台座であり、その台座21に対して動かないように配置された固定盤22と台座21とが、4本のガイドシャフト23で連結固定されている。ガイドシャフト23は、台座21の軸線周りに90°間隔で、軸線と平行に配置されている。台座21には、各ガイドパイプ17の基端部分が固定されている。   Reference numeral 21 denotes a pedestal that is formed in a cylindrical shape and is fixed to the frame of the operation unit 2. The fixed plate 22 and the pedestal 21 that are arranged so as not to move with respect to the pedestal 21 include four guide shafts. 23 is connected and fixed. The guide shaft 23 is arranged in parallel with the axis at 90 ° intervals around the axis of the pedestal 21. A base end portion of each guide pipe 17 is fixed to the base 21.

4本のガイドシャフト23により前後方向(図において上下方向)にスライド自在に支持された雄ねじ筒27の外周部には、操作用雌ねじ環5の内周部に形成された雌ねじと螺合する雄ねじが形成されている。30がその螺合部である。   A male screw threadedly engaged with a female screw formed on the inner peripheral part of the operating female screw ring 5 is provided on the outer peripheral part of the male screw cylinder 27 slidably supported by the four guide shafts 23 in the front-rear direction (vertical direction in the figure). Is formed. Reference numeral 30 denotes the screwing portion.

操作用雌ねじ環5は、軸線周りに回転自在に配置されているが、軸線方向への移動は、台座21と固定盤22とで規制されている。したがって、操作用雌ねじ環5を軸線周りに回転操作することにより、それと螺合する雄ねじ筒27がガイドシャフト23に沿って軸線方向に進退駆動される。   Although the internal thread 5 for operation is rotatably arranged around the axis, movement in the axial direction is restricted by the base 21 and the fixed platen 22. Therefore, by rotating the operating female screw ring 5 around the axis, the male screw cylinder 27 screwed with the operating screw ring 5 is driven to advance and retreat in the axial direction along the guide shaft 23.

そのような雄ねじ筒27には、4本の形状保持用操作ワイヤ15(15(I),15(O))が係合する第1と第2のワイヤ係合部材28,29が、図示されていないビス等により連結固定されている。32は、第1のワイヤ係合部材28と第2のワイヤ係合部材29とを連結固定する固定ビスである。   Such a male screw cylinder 27 is illustrated with first and second wire engaging members 28 and 29 with which four shape-retaining operation wires 15 (15 (I) and 15 (O)) are engaged. It is connected and fixed with screws that are not. Reference numeral 32 denotes a fixing screw for connecting and fixing the first wire engaging member 28 and the second wire engaging member 29.

略円柱状に形成された第1のワイヤ係合部材28の外表面には、図16に示されるように、一体につなげられてU字状に滑らかに曲げ戻された状態の2本の形状保持用操作ワイヤ15(I)の基端ループ部が係合する内側ワイヤ係合溝28gが、U字状に形成されている。なお、2本の形状保持用操作ワイヤ15(I)は1本のワイヤにより形成することができ、第1のワイヤ係合部材28の中心軸に対し180°対称の位置から内側ワイヤ係合溝28gに対し係合している。   On the outer surface of the first wire engaging member 28 formed in a substantially cylindrical shape, as shown in FIG. 16, the two shapes are connected together and smoothly bent back into a U shape. An inner wire engagement groove 28g with which the proximal loop portion of the holding operation wire 15 (I) is engaged is formed in a U shape. Note that the two shape-retaining operation wires 15 (I) can be formed by a single wire, and the inner wire engagement grooves are positioned 180 ° symmetrically with respect to the central axis of the first wire engagement member 28. It is engaged with 28g.

そのような形状保持用操作ワイヤ15(I)の基端部分は、矢印αで示されるように内側ワイヤ係合溝28gに沿って進退自在であり、したがって、屈曲形状保持可能管部11が受動的に屈曲動作する際にはそれに追随して形状保持用操作ワイヤ15(I)の基端部分が内側ワイヤ係合溝28gに沿って軸線方向に自由に進退し、屈曲形状保持可能管部11の屈曲動作に対して抵抗にならない。また、第1のワイヤ係合部材28を後方(図において上方)に移動させると、2本の形状保持用操作ワイヤ15(I)が同じ張力で牽引される。   The proximal end portion of the shape-retaining operation wire 15 (I) can be moved back and forth along the inner wire engaging groove 28g as indicated by an arrow α, and therefore the bent shape-retainable tube portion 11 is passive. When the bending operation is performed, the proximal end portion of the shape-maintaining operation wire 15 (I) freely moves forward and backward in the axial direction along the inner wire engagement groove 28g. It does not become resistance to the bending motion of Further, when the first wire engaging member 28 is moved backward (upward in the drawing), the two shape-maintaining operation wires 15 (I) are pulled with the same tension.

第1のワイヤ係合部材28の外周部には、略円筒状に形成された第2のワイヤ係合部材29が図17に示されるように被嵌固定されている。第2のワイヤ係合部材29の外表面にも、一体につなげられてU字状に滑らかに曲げ戻された状態の2本の形状保持用操作ワイヤ15(O)の基端ループ部が係合する外側ワイヤ係合溝29gが、内側ワイヤ係合溝28gとは90°位相をずらしてU字状に形成されている。   A second wire engagement member 29 formed in a substantially cylindrical shape is fitted and fixed to the outer peripheral portion of the first wire engagement member 28 as shown in FIG. Also on the outer surface of the second wire engaging member 29, the proximal end loop portions of the two shape-retaining operation wires 15 (O) connected together and smoothly bent back into a U shape are engaged. The mating outer wire engaging groove 29g is formed in a U shape with a 90 ° phase shift from the inner wire engaging groove 28g.

そのような形状保持用操作ワイヤ15(O)の基端部分は、矢印βで示されるように外側ワイヤ係合溝29gに沿って進退自在であり、したがって、屈曲形状保持可能管部11が受動的に屈曲動作する際にはそれに追随して形状保持用操作ワイヤ15(O)の基端部分が外側ワイヤ係合溝29gに沿って軸線方向に自由に進退し、屈曲形状保持可能管部11の屈曲動作に対して抵抗にならない。また、第2のワイヤ係合部材29を後方(図において上方)に移動させると、2本の形状保持用操作ワイヤ15(O)が同じ張力で牽引される。   The proximal end portion of the shape-retaining operation wire 15 (O) can be moved forward and backward along the outer wire engaging groove 29g as indicated by an arrow β, and therefore the bent shape-retainable tube portion 11 is passive. When the bending operation is performed, the proximal end portion of the shape-maintaining operation wire 15 (O) freely moves forward and backward in the axial direction along the outer wire engaging groove 29g. It does not become resistance to the bending motion of Further, when the second wire engaging member 29 is moved backward (upward in the drawing), the two shape-retaining operation wires 15 (O) are pulled with the same tension.

したがって、前出の固定ビス32で連結固定されている第1のワイヤ係合部材28と第2のワイヤ係合部材29を、矢印γで示されるように、一体に軸線方向の後方(図において上方)に移動させれば、4本の形状保持用操作ワイヤ15(I),15(O)が一緒に牽引される状態になる。   Accordingly, the first wire engaging member 28 and the second wire engaging member 29 that are connected and fixed by the fixing screw 32 described above are integrated into the rear in the axial direction (in the drawing, as indicated by an arrow γ). When moved upward), the four shape-retaining operation wires 15 (I) and 15 (O) are pulled together.

なお、第1のワイヤ係合部材28と第2のワイヤ係合部材29との連結位置(即ち、軸線方向の位置関係)を調整して固定ビス32で固定することにより、全部の形状保持用操作ワイヤ15(I),15(O)にかかる張力を均一化することができる。ただし、張力の均一化は、前出の公知のワイヤ繋ぎ部62(段落〔0059〕)等のような各種機構でも行うことができる。   It is to be noted that all the shapes can be retained by adjusting the connecting position (that is, the positional relationship in the axial direction) between the first wire engaging member 28 and the second wire engaging member 29 and fixing them with the fixing screw 32. The tension applied to the operation wires 15 (I) and 15 (O) can be made uniform. However, the tension can be made uniform by various mechanisms such as the above-described known wire connecting portion 62 (paragraph [0059]).

このような構成により、4本の形状保持用操作ワイヤ15(I),15(O)が操作部2側に牽引されていない状態では屈曲形状保持可能管部11が前述のように受動的に屈曲自在であり、操作用雌ねじ環5を回転操作して、4本の形状保持用操作ワイヤ15を基端側から一緒に牽引すると、各形状保持用操作ワイヤ15に均一な大きさの張力が発生して、前述のように屈曲形状保持可能管部11の屈曲形状が保持される状態になる。   With such a configuration, in a state where the four shape-maintaining operation wires 15 (I) and 15 (O) are not pulled toward the operation portion 2, the bent shape-maintainable tube portion 11 is passively set as described above. When the four shape-retaining operation wires 15 are pulled together from the proximal end side by rotating the operation female screw ring 5, a uniform tension is applied to each shape-retaining operation wire 15. As a result, the bent shape of the bent shape-holdable tube portion 11 is maintained as described above.

その際に、操作用雌ねじ環5の回転量を加減することにより屈曲形状保持可能管部11の形状保持力を適宜調整することもでき、操作用雌ねじ環5を元の状態に戻せば、屈曲形状保持可能管部11が再び受動的に屈曲自在な状態に戻る。   At that time, by adjusting the amount of rotation of the operating female thread ring 5, the shape retaining force of the bent shape-maintainable tube portion 11 can be adjusted as appropriate. If the operating female thread ring 5 is returned to its original state, The shape-maintainable tube portion 11 returns to the state in which it can passively bend again.

なお、操作部2を構成する各部材どうしの境界部等にはシール用のOリング等が適宜に装着されていて、形状保持用操作ワイヤ15等が配置されている内部空間を外部に対して水密にシールしている。そのような内部空間は、可撓性挿入部1の先端部分から操作部2内まで一つながりになっている。   It should be noted that a sealing O-ring or the like is appropriately attached to the boundary between the members constituting the operation unit 2 and the internal space in which the shape-retaining operation wire 15 or the like is disposed is open to the outside. Sealed watertight. Such an internal space is connected from the distal end portion of the flexible insertion portion 1 to the inside of the operation portion 2.

したがって、可撓性内視鏡が使用後に滅菌装置等に収容されて真空に近い環境内に置かれた状態になると、可撓性挿入部1を外装する柔軟な外皮チューブ16が膨らんでしまう可能性がある。そこで、可撓性内視鏡の内部空間の圧力が外部の圧力より一定以上高くなると開いて内部空間と外部とを連通させる逆止弁や、外部からの操作で内部空間と外部とを連通状態に保つことができる開放弁等(図示せず)を操作部2に配置すれば、そのような現象を防止することができる。   Therefore, when the flexible endoscope is housed in a sterilization apparatus or the like after use and placed in an environment close to a vacuum, the flexible skin tube 16 that sheathes the flexible insertion portion 1 may swell. There is sex. Therefore, when the pressure in the internal space of the flexible endoscope is higher than the external pressure, the check valve opens and communicates between the internal space and the outside. If an open valve or the like (not shown) that can be maintained at this position is disposed in the operation unit 2, such a phenomenon can be prevented.

図18は、上述の可撓性内視鏡の使用状態の一例を示しており、まず、屈曲形状保持可能管部11が受動的に形状変化自在な状態で、湾曲部13を遠隔操作しながら、先端部本体10が患者の口Aから食道を経て胃内に達するまで可撓性挿入部1を患者の体内に挿入する。   FIG. 18 shows an example of the usage state of the flexible endoscope described above. First, while the bent shape-maintainable tube portion 11 is passively changeable in shape, the bending portion 13 is remotely operated. The flexible insertion portion 1 is inserted into the patient's body until the distal end body 10 reaches the stomach from the patient's mouth A through the esophagus.

そして、処置具挿通チャンネル4に通した処置具60等で胃壁に孔Bを形成して、先端部本体10をその孔Bから胃の裏側に出し、先端部本体10が手術目標の胆嚢C等に対し正面から臨んだら、その状態で操作用雌ねじ環5を操作して屈曲形状保持可能管部11の屈曲形状を固定する。   Then, a hole B is formed in the stomach wall with the treatment instrument 60 or the like passed through the treatment instrument insertion channel 4, and the distal end body 10 is put out from the hole B to the back side of the stomach. On the other hand, when facing from the front, the operation internal thread ring 5 is operated in that state to fix the bent shape of the tube portion 11 capable of holding the bent shape.

それによって、屈曲形状保持可能管部11の屈曲形状を長時間にわたってそのまま保持することができるので、可撓性内視鏡50の処置具挿通チャンネル4に挿通した処置具60で胆嚢Cに対する処置を行って、手術を安全且つ円滑に行うことができる。60aは処置具60の先端部分である。そして、処置終了後には、屈曲形状保持可能管部11を受動的に屈曲自在な状態に戻して体内から抜去する。   Accordingly, the bent shape of the bendable shape-maintainable tube portion 11 can be held as it is for a long time, so that the treatment for the gallbladder C can be performed with the treatment tool 60 inserted into the treatment tool insertion channel 4 of the flexible endoscope 50. The operation can be performed safely and smoothly. Reference numeral 60 a denotes a distal end portion of the treatment instrument 60. Then, after the treatment is completed, the bent shape-maintainable tube portion 11 is returned to a passively bendable state and removed from the body.

なお、本発明は上記実施例に限定されるものではなく、例えば図19に示されるように、ワイヤガイド9を各関節輪7の内周部の180°対称位置に2個だけ取り付けて屈曲形状保持可能管部11を構成し、形状保持用操作ワイヤ15が2個の関節輪7毎に1個のワイヤガイド孔91内を通過するように構成しても差し支えない。また、ワイヤガイド孔が真っ直ぐに形成されているワイヤガイドが混在していてもよい。   The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 19, only two wire guides 9 are attached at 180 ° symmetrical positions on the inner peripheral portion of each joint ring 7 to be bent. The holdable tube portion 11 may be configured, and the shape maintaining operation wire 15 may be configured to pass through one wire guide hole 91 for every two joint rings 7. Moreover, the wire guide in which the wire guide hole is formed straight may be mixed.

また、ワイヤガイド孔91の形状は、形状保持用操作ワイヤ15が牽引されると、それによって形状保持用操作ワイヤ15に加わる張力の増大に対応して摩擦抵抗が増大する形状(即ち、形状保持用操作ワイヤ15と同径の硬質パイプが通過できない程度に湾曲した形状)に形成されていればどのような形状でもよい。   Further, the shape of the wire guide hole 91 is such that when the shape holding operation wire 15 is pulled, the frictional resistance increases corresponding to the increase in the tension applied to the shape holding operation wire 15 (that is, the shape holding). Any shape may be used as long as it is formed in such a shape that a hard pipe having the same diameter as the operation wire 15 cannot pass through.

また、形状保持用操作ワイヤ15としてチェーン状のワイヤや穴あきビーズを通したようなワイヤ等を用いてもよく、操作部2において形状保持用操作ワイヤ15を牽引する機構は、全ての形状保持用操作ワイヤ15を同時に牽引してその状態を保持することができる機構であればどのような機構を用いてもよい。また、本発明の可撓性内視鏡は口以外の体表開口又は体表の切開部等から体内に挿入して使用することもできる。   Further, a chain-like wire or a wire through which a perforated bead is passed may be used as the shape-retaining operation wire 15, and the mechanism for pulling the shape-retaining operation wire 15 in the operation unit 2 is capable of holding all shapes. Any mechanism may be used as long as the operating wire 15 can be pulled at the same time and the state can be maintained. The flexible endoscope of the present invention can also be used by being inserted into the body through a body surface opening other than the mouth or an incision in the body surface.

本発明の実施例に係る可撓性内視鏡の、形状保持用操作ワイヤに張力が作用していない状態における屈曲形状保持可能管部の部分拡大側面断面図である。FIG. 5 is a partially enlarged side cross-sectional view of a bent shape-maintainable tube portion of the flexible endoscope according to the embodiment of the present invention in a state where no tension is applied to the shape-maintaining operation wire. 本発明の実施例に係る可撓性内視鏡の、形状保持用操作ワイヤに張力が作用している状態における屈曲形状保持可能管部の部分拡大側面断面図である。FIG. 4 is a partially enlarged side cross-sectional view of a bent shape-maintainable tube portion in a state where tension is applied to the shape-maintaining operation wire of the flexible endoscope according to the embodiment of the present invention. 本発明の実施例に係る可撓性内視鏡の全体構成を示す側面図である。1 is a side view showing an overall configuration of a flexible endoscope according to an embodiment of the present invention. 本発明の実施例に係る可撓性内視鏡の、形状保持用操作ワイヤに張力が作用していない状態における可撓性挿入部の先端寄りの部分の側面断面図である。It is side surface sectional drawing of the part near the front-end | tip of a flexible insertion part in the state in which the tension | tensile_strength is not acting on the shape maintenance operation wire of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の、処置具挿通チャンネルの一例の側面部分断面図である。It is side surface fragmentary sectional view of an example of a treatment tool penetration channel of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の、屈曲形状保持可能管部の骨組みが屈曲した状態の斜視図である。It is a perspective view in the state where the framework of the flexible shape maintenance possible tube part of the flexible endoscope concerning the example of the present invention bent. 本発明の実施例に係る可撓性内視鏡の図4におけるVII−VII断面図である。FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 4 of the flexible endoscope according to the embodiment of the present invention. 本発明の実施例に係る可撓性内視鏡の、ワイヤガイドが取り付けられた関節輪単体の斜視図である。It is a perspective view of the joint ring single-piece | unit with which the wire guide was attached of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の、形状保持用操作ワイヤに張力が作用している状態における可撓性挿入部の先端寄りの部分の側面断面図である。It is side surface sectional drawing of the part near the front-end | tip of a flexible insertion part in the state in which tension | tensile_strength is acting on the shape maintenance operation wire of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の図4におけるX−X断面図である。It is XX sectional drawing in FIG. 4 of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の、形状保持用操作ワイヤに張力が作用していない状態における屈曲形状保持可能管部の骨組みの屈曲動作を説明するための側面断面図である。It is side surface sectional drawing for demonstrating bending | flexion operation | movement of the frame | frame of a bending shape maintenance possible pipe part in the state which tension is not acting on the shape maintenance operation wire of the flexible endoscope which concerns on the Example of this invention. . 本発明の実施例に係る可撓性内視鏡の、形状保持用操作ワイヤに張力が作用している状態における屈曲形状保持可能管部の骨組みの屈曲動作を説明するための側面断面図である。It is side surface sectional drawing for demonstrating bending | flexion operation | movement of the framework | frame of a bending shape maintenance possible tube part in the state which tension | tensile_strength acts on the shape maintenance operation wire of the flexible endoscope which concerns on the Example of this invention. . 本発明の実施例に係る可撓性内視鏡の操作部の略示図である。It is a schematic diagram of an operation part of a flexible endoscope concerning an example of the present invention. 本発明の実施例に係る可撓性内視鏡の操作部の操作用雌ねじ環の内部に配置された機構の側面断面図である。It is side surface sectional drawing of the mechanism arrange | positioned inside the internal thread ring for operation of the operation part of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の図14におけるXV−XV断面図である。It is XV-XV sectional drawing in FIG. 14 of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の操作部内の形状保持用操作ワイヤ係合部の部分斜視図である。It is a fragmentary perspective view of the shape maintenance operation wire engaging part in the operation part of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の操作部内の形状保持用操作ワイヤ係合部の部分斜視図である。It is a fragmentary perspective view of the shape maintenance operation wire engaging part in the operation part of the flexible endoscope which concerns on the Example of this invention. 本発明の実施例に係る可撓性内視鏡の使用状態の一例を示す略示図である。It is a schematic diagram showing an example of a use state of a flexible endoscope concerning an example of the present invention. 本発明の実施例に係る可撓性内視鏡の、ワイヤガイドが取り付けられた関節輪単体の変形例の斜視図である。It is a perspective view of the modification of the joint ring single-piece | unit to which the wire guide was attached of the flexible endoscope which concerns on the Example of this invention.

符号の説明Explanation of symbols

1 可撓性挿入部
2 操作部
4 処置具挿通チャンネル
4a 入口開口
4b 出口開口
5 操作用雌ねじ環(ワイヤ牽引操作装置)
6 湾曲操作ノブ(湾曲操作装置)
7 関節輪
8 連結軸
9 ワイヤガイド
11 屈曲形状保持可能管部
12 可撓管部
13 湾曲部
15(15(I),15(O)) 形状保持用操作ワイヤ
17 ガイドパイプ
27 雄ねじ筒(ワイヤ牽引操作装置)
28 第1のワイヤ係合部材(ワイヤ牽引操作装置)
29 第2のワイヤ係合部材(ワイヤ牽引操作装置)
32 固定ビス(ワイヤ張力調整手段)
60 処置具
91 ワイヤガイド孔
DESCRIPTION OF SYMBOLS 1 Flexible insertion part 2 Operation part 4 Treatment implement insertion channel 4a Inlet opening 4b Outlet opening 5 Female thread ring for operation (wire pulling operation apparatus)
6 Bending operation knob (Bending operation device)
DESCRIPTION OF SYMBOLS 7 Articulated ring 8 Connection shaft 9 Wire guide 11 Bending shape maintenance possible pipe part 12 Flexible pipe part 13 Bending part 15 (15 (I), 15 (O)) Shape maintenance operation wire 17 Guide pipe 27 Male screw cylinder (wire pulling) Operation device)
28 1st wire engaging member (wire pulling operation device)
29 Second wire engaging member (wire pulling operation device)
32 Fixing screw (wire tension adjusting means)
60 treatment tool 91 wire guide hole

Claims (11)

可撓性挿入部の一部又は全部に、複数の短筒状の関節輪が各々隣接する関節輪と相対的に回動自在に連結軸で直列に連結されて全体としてあらゆる方向に屈曲自在に構成された骨組みを有する屈曲形状保持可能管部が設けられ、
上記屈曲形状保持可能管部の先端部分には可撓性を有する少なくとも3本の形状保持用操作ワイヤの先端が連結されて、上記各関節輪に設けられたワイヤガイド孔内に上記形状保持用操作ワイヤが挿通され、
上記ワイヤガイド孔は、そこに挿通された形状保持用操作ワイヤが緩く通過する径であって、上記形状保持用操作ワイヤに加わる張力が大きくなるのにしたがって上記形状保持用操作ワイヤとの間の摩擦抵抗が増大する湾曲した形状に形成され、
その結果、上記各形状保持用操作ワイヤが基端側から牽引されていない状態では上記屈曲形状保持可能管部が受動的に形状変化自在であって、上記の全ての形状保持用操作ワイヤが基端側から牽引されると、それによって上記の全ての形状保持用操作ワイヤに加わる張力の増大に対応して上記各形状保持用操作ワイヤと上記ワイヤガイド孔との間の摩擦抵抗が増大することにより、上記屈曲形状保持可能管部の屈曲形状が保持されるようにしたことを特徴とする可撓性内視鏡。
A plurality of short cylindrical articulation rings are connected in series with a connecting shaft so as to be rotatable relative to adjacent articulation rings in part or all of the flexible insertion portion, and can be bent in all directions as a whole. A bent shape-maintainable tube portion having a structured frame is provided,
At least three flexible shape-retaining operation wires are connected to the distal end portion of the bent shape-retainable tube portion, and the shape-retaining tube is provided in a wire guide hole provided in each joint ring. The operation wire is inserted,
The wire guide hole is a diameter through which the shape holding operation wire inserted therethrough passes slowly, and the wire guide hole is formed between the wire and the shape holding operation wire as the tension applied to the shape holding operation wire increases. Formed in a curved shape with increased frictional resistance,
As a result, in the state where the shape-holding operation wires are not pulled from the proximal end side, the bent shape-holdable tube section can be passively changed in shape, and all the shape-holding operation wires are based on the above. When pulled from the end side, the frictional resistance between the shape-holding operation wires and the wire guide holes increases corresponding to the increase in tension applied to all the shape-holding operation wires. The flexible endoscope is characterized in that the bent shape of the bent shape-holdable tube portion is held.
上記ワイヤガイド孔が略くの字状に曲がった形状に形成されている請求項1記載の可撓性内視鏡。   The flexible endoscope according to claim 1, wherein the wire guide hole is formed in a substantially bent shape. 上記可撓性挿入部の上記屈曲形状保持可能管部より先端寄りの位置に、上記可撓性挿入部の基端側からの遠隔操作により屈曲する湾曲部が設けられている請求項1又は2記載の可撓性内視鏡。   The curved part bent by the remote operation from the base end side of the said flexible insertion part is provided in the position near the front-end | tip of the said bending shape holdable tube part of the said flexible insertion part. The flexible endoscope as described. 上記可撓性挿入部の基端側に操作部が連結されて、上記各形状保持用操作ワイヤの基端部分が上記屈曲形状保持可能管部の屈曲状態に追随して軸線方向に進退するように上記操作部に配置されると共に、上記の全ての形状保持用操作ワイヤの基端部分を一緒に牽引操作するためのワイヤ牽引操作装置が上記操作部に設けられている請求項1、2又は3記載の可撓性内視鏡。   An operation portion is connected to the proximal end side of the flexible insertion portion so that the proximal end portion of the shape-maintaining operation wire follows the bent state of the bent shape-retainable tube portion and advances and retreats in the axial direction. And a wire pulling operation device for pulling together the base end portions of all of the shape holding operation wires. 3. The flexible endoscope according to 3. 上記操作部に、上記の全ての形状保持用操作ワイヤの張力を均一化するためのワイヤ張力調整手段が設けられている請求項4記載の可撓性内視鏡。   The flexible endoscope according to claim 4, wherein the operation portion is provided with wire tension adjusting means for equalizing the tension of all the shape-maintaining operation wires. 上記ワイヤ張力調整手段が、上記の全ての形状保持用操作ワイヤの中の一部の形状保持用操作ワイヤの基端が係合する第1のワイヤ係合部材と他の形状保持用操作ワイヤの基端が係合する第2のワイヤ係合部材との軸線方向位置関係を調整するものである請求項5記載の可撓性内視鏡。   The wire tension adjusting means includes a first wire engaging member that engages with a proximal end of a part of the shape holding operation wires in all the shape holding operation wires, and another shape holding operation wire. 6. The flexible endoscope according to claim 5, wherein the positional relationship in the axial direction with the second wire engaging member with which the proximal end is engaged is adjusted. 上記可撓性挿入部の上記屈曲形状保持可能管部より先端寄りの位置に、上記可撓性挿入部の基端側からの遠隔操作により屈曲する湾曲部が設けられて、上記湾曲部を遠隔操作により屈曲させるための湾曲操作装置が上記操作部に設けられている請求項4、5又は6記載の可撓性内視鏡。   A bending portion that is bent by a remote operation from the proximal end side of the flexible insertion portion is provided at a position closer to the distal end than the bent shape-maintainable tube portion of the flexible insertion portion. The flexible endoscope according to claim 4, 5 or 6, wherein a bending operation device for bending by operation is provided in the operation section. 上記の少なくとも3本の形状保持用操作ワイヤが、上記屈曲形状保持可能管部の軸線周りに180°以上の間隔があかない位置関係で互いの間に間隔をあけて配置されている請求項1ないし7のいずれかの項に記載の可撓性内視鏡。   The at least three shape-maintaining operation wires are arranged at intervals between each other in a positional relationship in which there is no interval of 180 ° or more around the axis of the bent shape-retainable tube portion. The flexible endoscope according to any one of Items 7 to 7. 上記形状保持用操作ワイヤとして、4本の形状保持用操作ワイヤが、上記屈曲形状保持可能管部の軸線周りに略90°間隔で配置されている請求項1ないし8のいずれかの項に記載の可撓性内視鏡。   9. The shape holding operation wire includes four shape holding operation wires arranged at approximately 90 ° intervals around an axis of the bent shape holding tube. 10. Flexible endoscope. 上記可撓性挿入部の屈曲形状保持可能管部より基端寄りの部分が、外力により受動的に形状変化自在であって形状保持性のない可撓管部になっている請求項1ないし9のいずれかの項に記載の可撓性内視鏡。   The portion of the flexible insertion portion closer to the base end than the bent shape-maintainable tube portion is a flexible tube portion that is passively changeable in shape by an external force and has no shape retainability. The flexible endoscope according to any one of the above items. 上記可撓管部内には、上記各形状保持用操作ワイヤを軸線方向に進退自在にガイドする可撓性のガイドパイプが配置されている請求項10記載の可撓性内視鏡。   The flexible endoscope according to claim 10, wherein a flexible guide pipe that guides the shape-maintaining operation wires so as to advance and retreat in the axial direction is disposed in the flexible tube portion.
JP2007289161A 2007-11-07 2007-11-07 Flexible endoscope Pending JP2009112537A (en)

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Cited By (8)

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JP2009213602A (en) * 2008-03-10 2009-09-24 Fujinon Corp Insertion portion of endoscope
JP2010259478A (en) * 2009-04-30 2010-11-18 Hoya Corp Flexible endoscope
JP2010259477A (en) * 2009-04-30 2010-11-18 Hoya Corp Endoscope guide tube device
JP5253676B2 (en) * 2011-05-20 2013-07-31 オリンパスメディカルシステムズ株式会社 Endoscope
JP2014204899A (en) * 2013-04-15 2014-10-30 オリンパスメディカルシステムズ株式会社 Biliary tract endoscope system
WO2017142778A1 (en) * 2016-02-15 2017-08-24 St. Jude Medical, Cardiology Division, Inc. Deflectable catheter shaft
CN109803571A (en) * 2016-10-04 2019-05-24 奥林巴斯株式会社 The manufacturing method of endoscope-use swan-neck and endoscope-use swan-neck
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009213602A (en) * 2008-03-10 2009-09-24 Fujinon Corp Insertion portion of endoscope
JP2010259478A (en) * 2009-04-30 2010-11-18 Hoya Corp Flexible endoscope
JP2010259477A (en) * 2009-04-30 2010-11-18 Hoya Corp Endoscope guide tube device
JP5253676B2 (en) * 2011-05-20 2013-07-31 オリンパスメディカルシステムズ株式会社 Endoscope
US9173552B2 (en) 2011-05-20 2015-11-03 Olympus Corporation Endoscope
JP2014204899A (en) * 2013-04-15 2014-10-30 オリンパスメディカルシステムズ株式会社 Biliary tract endoscope system
WO2017142778A1 (en) * 2016-02-15 2017-08-24 St. Jude Medical, Cardiology Division, Inc. Deflectable catheter shaft
US10874832B2 (en) 2016-02-15 2020-12-29 St. Jude Medical, Cardiology Division, Inc. Deflectable catheter shaft
CN109803571A (en) * 2016-10-04 2019-05-24 奥林巴斯株式会社 The manufacturing method of endoscope-use swan-neck and endoscope-use swan-neck
CN109803571B (en) * 2016-10-04 2021-09-07 奥林巴斯株式会社 Endoscope curved tube and method for manufacturing endoscope curved tube
TWI674873B (en) * 2018-01-12 2019-10-21 新視電科技有限公司 Endoscope

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