WO2014024302A1 - Structure pour partie pliable d'endoscope - Google Patents

Structure pour partie pliable d'endoscope Download PDF

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Publication number
WO2014024302A1
WO2014024302A1 PCT/JP2012/070489 JP2012070489W WO2014024302A1 WO 2014024302 A1 WO2014024302 A1 WO 2014024302A1 JP 2012070489 W JP2012070489 W JP 2012070489W WO 2014024302 A1 WO2014024302 A1 WO 2014024302A1
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WO
WIPO (PCT)
Prior art keywords
wire guide
side engaging
guide
node ring
wire
Prior art date
Application number
PCT/JP2012/070489
Other languages
English (en)
Japanese (ja)
Inventor
野村　勝彦
Original Assignee
嘉潤國際有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 嘉潤國際有限公司 filed Critical 嘉潤國際有限公司
Priority to PCT/JP2012/070489 priority Critical patent/WO2014024302A1/fr
Publication of WO2014024302A1 publication Critical patent/WO2014024302A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments 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
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/0011—Manufacturing of endoscope parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments 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
    • A61B1/005—Flexible endoscopes
    • A61B1/0051—Flexible endoscopes with controlled bending of insertion part
    • A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments 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
    • A61B1/005—Flexible endoscopes
    • A61B1/0051—Flexible endoscopes with controlled bending of insertion part
    • A61B1/0057—Constructional details of force transmission elements, e.g. control wires

Definitions

  • the present invention relates to an endoscope bending portion structure.
  • an endoscope includes an endoscope bending portion (hereinafter referred to as a bending portion) for directing a visual field in a desired direction.
  • the bending portion includes a large number of flat cylindrical node rings (angle rings, bending pieces), and a large number of node rings are arranged in the direction of the cylinder center axis and are pivotally attached so as to be rotatable (oscillated) in order.
  • a wire guide is fixed to the inner surfaces of these many node rings, and an operation wire is movably inserted through the wire guide.
  • the operation wire is provided with two (one pair) or four (one pair two sets) according to the flexibility of the bending direction required for the bending portion, and the wires arranged on the inner surface of each node ring. After being inserted into the guide, its front end is fixed to the fixed portion at the front end of the bending portion, and its rear end is guided to the operation portion.
  • the bending unit is bent in the vertical direction or the horizontal direction.
  • Conventional wire guides are made of a cylindrical body (see Patent Document 1), a part of a wall of a node ring cut and processed (see Patent Document 2), and inserted and fixed in a hole formed in the node ring. And a specially shaped wire guide (see Patent Documents 3 and 4) in which a leg portion and a cylindrical portion through which an operation wire is inserted are integrated.
  • connection pins and the wire guides of Patent Documents 3 and 4 also serve as pins for connecting the node rings, and there is an advantage that the connection pins and the wire guides can be positioned at the same position in the circumferential direction. These parts are complicated in shape and difficult to assemble.
  • the present invention has been created in view of the above problems, and an object of the present invention is a simple structure that can increase the adhesive strength with a node ring, and is easy to assemble and inexpensive.
  • the object is to provide a mirror bending portion structure.
  • An endoscope bending portion structure in which a plurality of cylindrical node rings are arranged in the axial direction of the cylinder and are rotatably connected to each other, and an operation wire is inserted through a wire guide disposed on the inner peripheral surface of the node ring.
  • the wire guide is constituted by a coil spring having a guide portion for guiding the operation wire and a wire guide side engagement portion
  • the node ring is formed with a node ring side engaging portion that is engaged with the wire guide side engaging portion
  • the wire guide includes a wire guide side engaging portion and a node ring side engaging portion.
  • an endoscope bending portion structure that has a simple structure and can increase the adhesive strength with the node ring, and that is easy to assemble and low in cost.
  • FIG. 4 is a detailed view corresponding to FIG. 3 showing an endoscope bending portion structure according to a second embodiment of the present invention, where (A) is a plan sectional view, and (B) is a side surface taken along line BB of (A). It is sectional drawing.
  • FIG. 4 is a detailed view corresponding to FIG.
  • FIGS. 4A and 4B are detailed views corresponding to FIG. 3 showing an endoscope bending portion structure according to a fourth embodiment of the present invention, in which FIG. 3A is a cross-sectional plan view, and FIG. It is sectional drawing.
  • the endoscope according to the present embodiment is configured as a medical endoscope.
  • the endoscope includes an insertion portion 10 to be inserted into the body, an operation portion 11 connected to the proximal end portion of the insertion portion 10, and a universal connected to the operation portion 11.
  • Cord 12 The insertion portion 10 includes a distal end rigid portion 13, a bendable bending portion 14 provided continuously with the proximal end of the distal end rigid portion 13, and a flexible flexible portion 15 provided continuously with the proximal end of the bending portion 14. And comprising.
  • the flexible part 15 has a length of several meters in order to allow the distal rigid part 13 to reach a target position in the body.
  • the distal end rigid portion 13 includes an objective lens and a solid-state imaging device.
  • the image light of the site to be observed taken in from the objective lens is imaged by the solid-state imaging device.
  • An image signal obtained by the solid-state imaging device is sent to a processor device (not shown) connected to the universal cord 12 via a signal cable (not shown) inserted into the insertion unit 10 and the operation unit 11. Sent.
  • the processor device performs various types of image processing on the image signal, and displays it as an endoscopic image on a monitor (not shown). Further, the distal end rigid portion 13 is provided with an illumination window.
  • Illumination light from a light source device (not shown) connected to the universal cord 12 is guided to an illumination window via a light guide (not shown) inserted into the insertion unit 10 and the operation unit 11 to be illuminated. Irradiated from the window to the observed site.
  • the operation unit 11 is provided with a forceps port 16.
  • a treatment tool such as a forceps or an injection needle used for treatment of the affected part is inserted into the forceps port 16.
  • the forceps port 16 is connected to a forceps channel 17 (broken line) disposed in the insertion portion 10.
  • the forceps channel 17 is connected to a forceps outlet (not shown) provided in the distal end rigid portion 13.
  • the operation unit 11 is provided with an air / water supply button 18 and a suction button 19.
  • the air / water supply button 18 is operated when a liquid such as air or water is allowed to flow through an air / water supply channel (not shown) provided in the insertion portion 10.
  • the air or liquid that has flowed through the air / water supply channel is ejected from a nozzle (not shown) provided in the distal end rigid portion 13.
  • the suction button 19 is operated when sucking an object to be sucked such as a body fluid or tissue through the forceps channel 17.
  • the bending portion 14 includes a plurality (generally a dozen) node rings (angle rings, bending pieces) 20.
  • the plurality of node rings 20 are connected in series, and the outer periphery of the connected node rings 20 is covered with a flexible angle rubber 21.
  • the leading (front end) node ring 20 is fixed to the distal end rigid portion 13.
  • the bending portion 14 bends in the vertical direction in conjunction with the operation of the vertical angle knob 22 provided in the operation portion 11, and bends in the horizontal direction in conjunction with the operation of the left and right angle knob 23. Thereby, the front-end
  • FIG. 2 shows two node rings 20 constituting the bending portion 14.
  • the node ring 20 includes a cylindrical portion 25 and two pairs of an inner tongue 26 and an outer tongue 27 that form a pair with each other.
  • the two inner velocities 26, 26 are spaced apart 180 degrees in the circumferential direction from the end of the cylindrical portion 25 on the side of the operating portion 11, and project in the cylindrical axis direction.
  • Each of the 13 side end sides protrudes at a position facing the two inner velocities 26 and 26. That is, the inner tongue 26 and the outer tongue 27 are alternately arranged at intervals of 90 degrees in the circumferential direction of the cylindrical portion 25.
  • the inner tongue 26 is located one step away from the outer tongue 27 inward in the radial direction of the cylindrical portion 25. The amount of deviation is about the thickness of the cylindrical portion 25.
  • the inner tongue 26 has a connecting hole 28 at its center
  • the outer tongue 27 has a connecting hole 29 at its center.
  • the front and rear node rings 20, 20 are pivotally attached to each other by a connecting pin 30 inserted across the connecting hole 28 of the inner tongue 26 and the connecting hole 29 of the outer tongue 27.
  • the two node rings 20, 20 depicted in FIG. 2 can be bent in the left-right direction by the upper and lower connecting pins 30 in FIG. 2.
  • the node ring which is not shown in figure connected similarly via the connection pin 30 before and behind the two node rings 20 and 20 can be bent in the up-down direction. In this way, the bending portion 14 can be bent up and down and left and right by sequentially connecting a plurality of flat cylindrical node rings 20 arranged in the direction of the cylinder axis in order.
  • FIG. 2 shows only a pair of wire guides 40, 40 for bending in the left-right direction. That is, the pair of wire guides 40 and 40 are fixed to the inner peripheral surface of the node ring 20 to which the pair of left and right bending operation wires 32 and 32 are wired, respectively.
  • an operation wire and a wire guide for bending in the vertical direction are provided.
  • the operation wire 32 has a front end portion fixed to the distal end rigid portion 13 of FIG.
  • the rear end portion of the operation wire 32 is guided to the operation portion 11 through the flexible portion 15, and is coupled to the vertical angle knob 22 (and the left and right angle knob 23) as a bending operation mechanism.
  • the wire guide 40 (hereinafter referred to as a coil spring wire guide) according to the present embodiment is constituted by a closely wound coil spring.
  • the coil spring wire guide 40 is disposed at a specified position on the inner peripheral surface of the cylindrical portion 25 of the node ring 20, and is a fixed portion formed by brazing using a brazing filler metal. It is fixed by P.
  • the coil spring wire guide 40 includes a guide portion 41 for guiding the operation wire 32 and a wire guide side engagement portion (hereinafter referred to as a first engagement portion) 42 formed at the center in the length direction of the guide portion 41. And having.
  • the guide part 41 is constituted by a constant-diameter coil part of a closely wound coil spring.
  • the first engaging portion 42 is configured in series with the guide portion 41 with the central portion of the closely wound coil spring bulging outward in the radial direction.
  • the outer diameter of the first engaging portion 42 is formed to be larger than the outer diameter of the guide portion 41, that is, the outer diameter of the constant-diameter shaped portion of the closely wound coil spring. It is a concentric circle.
  • a through hole 43 as a node ring side engaging portion (hereinafter referred to as a second engaging portion) is formed at a position where the left and right bending operation wire 32 is laid on the inner peripheral surface of the cylindrical portion 25 of the node ring 20.
  • the coil spring wire guide 40 has a hard solder (a high melting point of 450 ° C. or higher) such as silver solder or gold solder in a state where the first engaging portion 42 is engaged with the through hole 43 from the inside of the cylindrical portion 25. It is fixed by a fixing portion P formed by brazing using a brazing filler metal.
  • the closely wound coil spring constituting the coil spring wire guide 40 is a coil spring in which a wire having a circular cross section (so-called round wire) made of a stainless steel material for a spring is closely wound in a cylindrical shape.
  • the coil spring wire guide 40 has a wire diameter, an outer diameter D2 of the constant diameter coil portion (guide portion 41), an outer diameter D1 of the large diameter coil portion (first engaging portion 42), an inner diameter d of the constant diameter coil portion, There is a wide degree of freedom in selecting the axial length L and the like.
  • wire diameter 0.2 to 0.3 mm
  • outer diameter D1 1.3 to 1.9 mm
  • outer diameter D2 1.0 to 1.3 mm
  • inner diameter d 0.6 to 1 3 mm.
  • the coil spring wire guide 40 is formed into a tightly wound coil from a wire having a circular cross section, and therefore uses a smooth R surface (convex curved surface) at the inner diameter end of both ends without requiring any special post-processing. Thus, friction with the operation wire 32 can be reduced.
  • the node ring 20 is made of, for example, a stainless steel material.
  • a cylindrical coil spring is optimal as a material for the wire guide, and if an engagement portion that engages the coil spring and the node ring is formed, the adhesive strength can be easily increased. Based on discovery.
  • the advantage of the cylindrical coil spring is that it is easy to obtain including the selection of the diameter, and that the R surface of the coil wire material is preliminarily attached to the inner circumferential surface of the end, so that R machining is not necessary, Since a periodic gap is formed on the contact surface with the ring by the R surface of the coil wire rod, it can be mentioned that it can be fixed to the node ring with high connection strength by interposing a hard solder in this gap.
  • the advantages of the coil spring wire guide are significant when compared with a conventional cylindrical body (a wire guide disclosed in Patent Document 1) that cuts a metal pipe.
  • the first engaging portion 42 can be easily formed by bulging the central portion of the tightly wound coil spring outward in the radial direction. Since the through hole 43 can be easily bored in the cylindrical portion 25, the second engaging portion 43 can be easily configured in the cylindrical portion 25. For example, the through-hole 43 can be drilled into the cylindrical portion 25, or can be molded simultaneously with the cylindrical portion 25 during molding (pressing or molding).
  • the through hole 43 and the first engagement portion Since the hard solder (silver solder or gold solder) enters the gap S between the contact surfaces 42 by capillary action or surface tension, the fixed portion P is formed, so that the coil spring wire guide 40 is attached to the node ring 20. It can be fixed securely.
  • the advantage of brazing is that hard brazing enters the gap S between adjacent circular wires formed (generated) on the contact surface between the coil spring wire guide 40 and the cylindrical portion 25 of the node ring 20, and is firmly bonded. Is in the point where is obtained.
  • the hard solder is not only in the contact portion between the first engagement portion 42 and the second engagement portion 43 but also in the gap S between the circular wire rods of the adjacent coil spring wire guide 40 on the center side of the node ring 20.
  • the fixing portion P has an effect of making the coil spring wire guide 40 itself a strong cylindrical body.
  • FIG. 4 shows a second embodiment of the present invention. This embodiment is different from the first embodiment in the configuration of the first engagement portion.
  • the coil spring wire guide 40A according to the present embodiment includes a guide portion 41 and a first engagement portion 42 formed at the center in the length direction of the guide portion 41, as in the first embodiment. .
  • the first engagement portion 42 is eccentric with respect to the guide portion 41 so that the end portion on the center side of the node ring 20 contacts the same tangential plane. That is, the guide part 41 and the first engagement part 42 have the same tangent line on the center side of the node ring 20.
  • the first engaging portion 42 does not protrude toward the center side of the node ring 20 with respect to the guide portion 41.
  • the storage space of the built-in object stored in the bending portion 14) is not sacrificed.
  • FIG. 5 shows a third embodiment of the present invention.
  • This embodiment is different from the first embodiment in the configuration of the first engagement portion and the second engagement portion.
  • both end portions of the guide portion 41 are extended outwardly to project the fixed leg portion 44 as the first engagement portion, and the cylindrical shape of the node ring 20
  • a pair of through holes 45, 45 for receiving the fixed leg portion 44 are formed as second engaging portions. According to this embodiment, there is an advantage that it is not necessary to process the coil spring by selecting the coil spring having a pair of locking portions.
  • FIG. 6 shows a third embodiment of the present invention. This embodiment is different from the first embodiment in the configuration of the first engagement portion and the second engagement portion.
  • a central portion in the length direction of the guide portion 41 is cut into a flat surface (so-called chamfering), and a notch portion 48 is formed as a first engagement portion.
  • an engagement convex portion 49 as a second engagement portion that engages with the notch portion 48 is formed on a flat surface.
  • the cutout portion 48 can be easily formed by chamfering the central portion of the close-wound coil spring, so that the first engagement portion 42 can be easily formed.
  • the first engagement portion 42 does not protrude toward the center side of the node ring 20 with respect to the guide portion 41, so that the built-in object stored in the node ring 20 (curved portion 14) There is an advantage that storage space is not sacrificed.
  • the coil spring wire guides 40A, 40B, 40C of the second to fourth embodiments are similar to the coil spring wire guide 40 of the first embodiment, and the inner peripheral surface of the cylindrical portion 25 of the node ring 20 by the fixing portion P. Fixed to.
  • FIG. 2 is merely an example of the shape of the node ring 20 and the coupling (pivoting) structure of the front and rear node rings.
  • the present invention can be applied regardless of the shape of the node ring and the joint (pivot) structure of the front and rear node rings.
  • the “constant diameter” of the constant diameter coil portion of the coil spring constituting the guide portion 41 does not mean “constant diameter” in a microscopic sense.
  • the diameter may be a “constant diameter”, that is, a diameter that allows the operation wire 32 to slide smoothly and relatively. That is, the coil spring is not limited to a cylindrical coil spring, and may be a non-cylindrical shape (via barrel shape, drum shape) or the like.
  • the coil spring is not limited to a compression coil spring, and may be a tension coil spring, a torsion coil spring, or the like.
  • the first engaging portion 42 is not limited to being provided at the central portion of the guide portion 41, but may be provided at the end portion of the guide portion 41, not limited to being provided at one location, and may be provided at a plurality of locations.
  • the second engagement portion is not limited to being formed in the through hole, but may be formed in a non-through hole (so-called blind hole), a depression, a groove, a recess, or the like.
  • the fixing portion P is not limited to being formed by brazing, but soldering (soldering iron) using soft brazing (a soldering filler material having a low melting point of less than 450 ° C., also referred to as solder), heat or pressure, or its It is possible to use fixing means such as welding that joins two members by both of them, adhesion or the like that joins two surfaces by chemical or physical force by an adhesive, or both.
  • the present invention is not limited to this, and can be applied to general endoscope bending portion structures such as industrial endoscopes.
  • the endoscope bending portion structure of the present invention can be widely used for all endoscopes such as medical endoscopes or industrial endoscopes.

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

Abstract

L'invention concerne une structure pour une partie pliable d'endoscope, avec laquelle la force de liaison de joints annulaires peut être augmentée à l'aide d'une structure simple, qui est facile à assembler et a des coûts réduits. Dans cette structure pour une partie pliable d'endoscope, plusieurs joints annulaires cylindriques (20) sont alignés dans la direction d'axe central de cylindre, chaque joint annulaire précité (20) étant accouplé de manière rotative, avec des câbles de manipulation (32) vissés à travers des fils-guides (40) qui sont positionnés sur les faces périphériques intérieures des joints annulaires (20). Les fils-guides (40) sont configurés par des ressorts hélicoïdaux ayant des parties de guidage (41) qui guident les câbles de manipulation (32), et des parties de prise côté fil-guide (42). Des parties de prise côté joint annulaire (43), qui sont en prise avec les parties de prise côté fil-guide (42), sont formées dans les joints annulaires (20). Les fils-guides (40) formés à partir de ressorts hélicoïdaux sont fixés aux joints annulaires (20) par des parties de fixation (P) qui sont formées par brasage des parties de prise côté fil-guide (42) et des parties de prise côté joint annulaire (43).
PCT/JP2012/070489 2012-08-10 2012-08-10 Structure pour partie pliable d'endoscope WO2014024302A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/JP2012/070489 WO2014024302A1 (fr) 2012-08-10 2012-08-10 Structure pour partie pliable d'endoscope

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Application Number Priority Date Filing Date Title
PCT/JP2012/070489 WO2014024302A1 (fr) 2012-08-10 2012-08-10 Structure pour partie pliable d'endoscope

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WO2014024302A1 true WO2014024302A1 (fr) 2014-02-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016144574A (ja) * 2015-02-09 2016-08-12 富士フイルム株式会社 内視鏡の湾曲部及び内視鏡
CN107951455A (zh) * 2017-11-03 2018-04-24 珠海普生医疗科技有限公司 一种蛇骨钢丝限位结构
WO2021181705A1 (fr) * 2020-03-13 2021-09-16 オリンパス株式会社 Endoscope
WO2022003889A1 (fr) * 2020-07-02 2022-01-06 オリンパス株式会社 Tube flexible d'endoscope, endoscope et procédé de fabrication de tube flexible d'endoscope

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0428335A (ja) * 1990-05-24 1992-01-30 Asahi Optical Co Ltd 内視鏡の湾曲装置
JPH0681508U (ja) * 1993-05-10 1994-11-22 オリンパス光学工業株式会社 内視鏡用処置具
JP2002191550A (ja) * 2000-12-22 2002-07-09 Asahi Optical Co Ltd 内視鏡の製造方法および内視鏡
US20080255422A1 (en) * 2006-01-13 2008-10-16 Olympus Medical Systems Corp. Medical device
JP2012040308A (ja) * 2010-08-23 2012-03-01 Olympus Corp ワイヤガイド部材

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0428335A (ja) * 1990-05-24 1992-01-30 Asahi Optical Co Ltd 内視鏡の湾曲装置
JPH0681508U (ja) * 1993-05-10 1994-11-22 オリンパス光学工業株式会社 内視鏡用処置具
JP2002191550A (ja) * 2000-12-22 2002-07-09 Asahi Optical Co Ltd 内視鏡の製造方法および内視鏡
US20080255422A1 (en) * 2006-01-13 2008-10-16 Olympus Medical Systems Corp. Medical device
JP2012040308A (ja) * 2010-08-23 2012-03-01 Olympus Corp ワイヤガイド部材

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016144574A (ja) * 2015-02-09 2016-08-12 富士フイルム株式会社 内視鏡の湾曲部及び内視鏡
CN105852781A (zh) * 2015-02-09 2016-08-17 富士胶片株式会社 内窥镜的弯曲部以及内窥镜
US10076236B2 (en) 2015-02-09 2018-09-18 Fujifilm Corporation Bending portion for endoscope and endoscope
CN107951455A (zh) * 2017-11-03 2018-04-24 珠海普生医疗科技有限公司 一种蛇骨钢丝限位结构
WO2021181705A1 (fr) * 2020-03-13 2021-09-16 オリンパス株式会社 Endoscope
WO2022003889A1 (fr) * 2020-07-02 2022-01-06 オリンパス株式会社 Tube flexible d'endoscope, endoscope et procédé de fabrication de tube flexible d'endoscope

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