WO2019163252A1 - Structure de raccordement de tuyau - Google Patents

Structure de raccordement de tuyau Download PDF

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Publication number
WO2019163252A1
WO2019163252A1 PCT/JP2018/044757 JP2018044757W WO2019163252A1 WO 2019163252 A1 WO2019163252 A1 WO 2019163252A1 JP 2018044757 W JP2018044757 W JP 2018044757W WO 2019163252 A1 WO2019163252 A1 WO 2019163252A1
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WO
WIPO (PCT)
Prior art keywords
tubular body
central axis
rivet
protrusion
bending piece
Prior art date
Application number
PCT/JP2018/044757
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English (en)
Japanese (ja)
Inventor
圭 小林
Original Assignee
オリンパス株式会社
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 オリンパス株式会社 filed Critical オリンパス株式会社
Publication of WO2019163252A1 publication Critical patent/WO2019163252A1/fr

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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/08—Joints with sleeve or socket with additional locking means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes

Definitions

  • the present invention relates to a tube connection structure suitable for connecting a thin tubular body constituting an insertion portion of an endoscope or a catheter.
  • endoscopes and catheter insertion portions used in the medical field and the like are configured using a thin and long tubular structure.
  • a tubular structure is configured by connecting a plurality of tubular bodies for realizing various functions along a longitudinal axis (center axis).
  • various functional parts such as a front-end
  • FIG. 5 of Japanese Patent Application Laid-Open No. 2017-129229 a female joint for connecting with a male joint with a pin (protrusion) protruding on the outer peripheral side is shown.
  • a circumferential intermediate passage extending in the circumferential direction, a longitudinal front passage extending forward from one end of the circumferential intermediate passage, and a longitudinal rear passage extending in the other end pattern of the circumferential intermediate passage.
  • a technology for connecting two pipes by providing a pin receiving passage (groove) with a male joint pin in the pin receiving passage.
  • the present invention has been made in view of the above circumstances, and an object thereof is to provide a pipe connection structure capable of accurately connecting thin tubular bodies in a good connection state.
  • a pipe connection structure includes a first tubular body having a central axis, an outer diameter smaller than an inner diameter of the first tubular body, and the inside of the first tubular body along the central axis.
  • a second tubular body having a slidable sliding portion and extending from one end to the other along the central axis, and projecting from the inner peripheral surface of the first tubular body toward the central axis
  • a projection provided on the first tubular body having a portion and a sliding portion provided on the sliding portion of the second tubular body, wherein the projection is received and the projection is slid from the one end side to the other end side.
  • 1 groove portion and the sliding portion of the second tubular body are provided in communication with the first groove portion, the protrusion is received, and the protrusion is slid in a direction intersecting the direction along the central axis. And a second groove portion having an end surface against which the slid protrusion is abutted.
  • FIG. 11 XI-XI cross-sectional view of FIG. 11
  • FIG. 1 is an overall view of an endoscope
  • FIG. 2 is a cross-sectional view of a main portion of an insertion portion
  • FIG. 3 is a main portion of a connecting portion between a bending portion and a flexible tube portion
  • 4 is an exploded perspective view
  • FIG. 4 is a perspective view showing the relationship between the connection base to which the flexible tube is connected and the most proximal bending piece
  • FIG. 5 is a cross-sectional view of the main part showing the relationship between the most proximal bending piece and the rivet.
  • 6 is a perspective view of the rivet
  • FIG. 7 is a plan view showing the relationship between the most proximal bending piece and the coupling cap
  • FIG. 8 is a sectional view taken along the line VIII-VIII in FIG.
  • An endoscope 1 shown in FIG. 1 includes an insertion portion 2 that is formed in an elongated tube shape and is inserted into a subject such as a body cavity, an operation portion 3 that is connected to the proximal end side of the insertion portion 2, and an operation
  • positioned at the front end side of the universal cord 4 are provided as main components.
  • the endoscope 1 of the present embodiment is a transnasal endoscope that performs inspection of the upper digestive tract such as the esophagus, stomach, and duodenum via the nose of the subject.
  • the outer diameter of 2 is a small diameter of about 5 mm.
  • the insertion portion 2 of the endoscope 1 includes, in order from the distal end side along the longitudinal direction, a distal end portion 6, a bending portion 7 connected to the proximal end side of the distal end portion 6, and a proximal end of the bending portion 7. And a long flexible tube portion 8 continuously provided on the side.
  • the operation unit 3 covers the proximal end of the flexible tube unit 8 and is connected to the flexible tube unit 8, and the operation unit 3 is connected to the folding unit 3 a, and the user uses the endoscope 1. And a gripping portion 3b that is gripped by a hand.
  • Various operation members are disposed on the proximal end side of the grasping portion 3b, and a treatment instrument insertion port 9 for guiding a treatment instrument such as forceps into the body cavity is provided on the distal end side of the grasping portion 3b.
  • the bending operation knob 10 As an operation member provided in the operation unit 3, there is a bending operation knob 10 for performing the bending operation of the bending unit 7 described above.
  • the bending operation knob 10 pulls or relaxes the bending operation wire 40 as a long object inserted over the entire length in the insertion portion 2 in accordance with a user operation input, for example, the bending portion 7.
  • the up and down direction and the left and right direction of the bending portion 7 and the like are associated with, for example, the up and down direction and the left and right direction of an image captured by an imaging unit (not shown) built in the tip portion 6. Is defined.
  • the bending operation knob 10 is provided with a bending fixing lever 11 for fixing the bending state of the bending portion 7. Furthermore, as operation members provided in the operation unit 3, a plurality of operation switches for performing operations corresponding to air / water supply operations or suction operations, imaging, illumination, and the like are provided.
  • the universal cord 4 passes through the inside of the bending portion 7 and the flexible tube portion 8 from the distal end of the insertion portion 2 to the operation portion 3, and further inserts various signal lines and the like extending from the operation portion 3.
  • a light guide for transmitting illumination light of a light source device (not shown) is inserted, and an air / water supply tube extending from an air / water supply device (not shown) is further provided. It is a composite cable.
  • the connector 5 provided at the extending end of the universal cord 4 is connected to various devices such as a signal processing device (video processor) light source device, an air / water supply device, and other peripheral devices.
  • the endoscope 1 constitutes an endoscope system together with various device groups.
  • the distal end portion 6 positioned at the distal end of the insertion portion 2 is configured to have a distal end configuration portion (hereinafter referred to as a distal end rigid portion) 20 that is a rigid cylindrical frame.
  • the distal end hard portion 20 includes an illumination optical system for illuminating the inside of the subject, an imaging unit, and the like, and an air / water supply channel and forceps for supplying fluid to the target portion in the subject.
  • a treatment instrument insertion channel or the like from which a treatment instrument is derived is opened at the distal end surface (none of which is shown).
  • the most advanced bending piece 22 located at the most distal end of the bending piece set 21 described later is fixed to the proximal end side of the distal end hard portion 20.
  • a plurality of bending pieces 23 for constituting a bending piece set 21 which is a bending structure is disposed inside the bending portion 7.
  • the plurality of bending pieces 23 are arranged in a line along the longitudinal axis (center axis O) on the proximal end side of the most advanced bending piece 22.
  • the most proximal end bending piece 24 as a first tubular body having a substantially cylindrical shape is disposed on the proximal end side of the piece row composed of a plurality of bending pieces 23 (that is, the most proximal end of the bending piece set 21).
  • the most advanced bending piece 22, the plurality of bending pieces 23, and the most proximal bending piece 24 are rotated by a rivet 25, which is a pivot member, at a portion where adjacent connecting portions overlap each other at positions corresponding to the vertical and horizontal directions.
  • a bending structure is formed that can be bent in four directions perpendicular to the upper and lower sides and the right and left sides.
  • the rivet 25 has a flange-like side of the head arranged on the inner diameter side of the bending piece set 21 in order to prevent the rivet 25 from protruding to the outer shape side.
  • the cutting edge bending piece 22 is provided with a wire fixing portion 22a for fixing one end of the wire 40 on the distal end side.
  • the wire fixing portions 22a are provided at four locations on the inner peripheral side of the most advanced bending piece 22 corresponding to the four wires 40 for bending operation in the four directions of up and down and left and right.
  • annular guide rings 23 a and 24 a are provided at appropriate positions on the inner peripheral side of each bending piece 23 and the most proximal bending piece 24.
  • Each guide ring 23a, 24a is inserted into the middle of each wire 40 having a distal end fixed to the wire fixing portion 22a, and the base end side of each wire 40 is connected to the bending operation knob 10 of the operation portion 3 (see FIG. (Not shown).
  • the bending portion 7 bends in any of the vertical and horizontal directions.
  • the bending portion 7 has a bending structure formed by connecting a plurality of bending pieces 23 in the longitudinal axis direction, and pulling operation by the wires 40 from the operation portion 3 in four directions perpendicular to the upper and lower sides and the left and right. Actively curves with input.
  • the outer periphery of the plurality of bending pieces 23 is covered with a net-like blade 15 formed by braiding a metal or non-metallic fine wire. Further, the outer periphery of the blade 15 is covered with a curved rubber 17, and an outer skin from the distal end portion 6 to the curved portion 7 is formed by the curved rubber 17.
  • the curved rubber 17 is fixed to the outer periphery of the distal end portion 6 in a watertight manner, but other portions along the insertion direction are the most advanced bending piece 22, the plurality of bending pieces 23, and the most proximal end.
  • the outer periphery of the bending piece 24 is covered with no adhesion.
  • a spiral tube (flex) 30 configured by spirally winding a band-shaped member is disposed inside the flexible tube portion 8.
  • the outer periphery of the spiral tube 30 is covered with a mesh blade (mesh tube) 31 formed by braiding a metal or non-metallic fine wire.
  • the outer periphery of the blade 31 is covered with an outer skin 32, and the distal end side of the outer skin 32 is liquid-tightened by a bobbin adhering portion 33 on the proximal end side of the curved rubber 17 extending to the flexible tube portion 8 side. It is connected.
  • connection cap 35 as a second tubular body having a substantially cylindrical shape is connected to the tip of the spiral tube 30 covered with the blade 31.
  • the distal ends of four guide sheaths 41 as wire guide members into which the four wires 40 are inserted so as to be able to advance and retreat are fixed to the inner periphery of the coupling base 35 by brazing or the like.
  • the guide sheath 41 is formed as a flexible coil pipe formed by tightly winding a stainless steel wire, for example, and is inserted through the inner peripheral side of the flexible tube portion 8 of the insertion portion 2.
  • connection base 35 is connected to the inner periphery on the proximal end side of the most proximal end bending piece 24, thereby configuring the spiral tube 30 constituting the flexible tube portion 8 and the bending portion 7. Connection with the bending piece set 21 is realized.
  • the most proximal bending piece 24 has a substantially cylindrical tip side region 45 and a larger diameter than the tip side region 45.
  • forms the substantially cylindrical shape formed is comprised by the cylindrical part with the step provided in a row.
  • the distal end region 45 of the most proximal bending piece 24 is provided with a connecting portion 45a with the adjacent bending piece 23 and the above-described guide ring 24a.
  • a through hole 46a penetrating in the thickness direction of the most proximal end bending piece 24 that is, from the inner peripheral side to the outer peripheral side of the most proximal end bending piece 24. (See FIGS. 3 and 5 etc.).
  • a rivet 47 is held in the through hole 46a.
  • the shaft portion 47 a is inserted into the through hole 46 a from the inner peripheral side of the most proximal end bending piece 24, and the tip of the shaft portion 47 a is caulked on the outer peripheral side of the most proximal end bending piece 24. It is held in the hole 46a.
  • the head 47b having a flange-like shape in the rivet 47 is disposed so as to protrude toward the inner periphery of the most proximal end bending piece 24, thereby realizing a function as a protrusion.
  • the rivet 47 is provided with a slit 47c in a portion from the head 47b to a part of the shaft portion 47a.
  • the slit 47c is positioned so as to extend in a direction orthogonal to the central axis O of the most proximal bending piece 24 when the rivet 47 is held in the through hole 46a.
  • the head 47b of the rivet 47 can be elastically deformed in the direction of the central axis O within the range allowed by the slit 47c.
  • connection cap 35 is, for example, a stepped portion in which a distal end side region 50 having a substantially cylindrical shape and a proximal end side region 51 having a substantially cylindrical shape formed in a larger diameter than the distal end side region 50 are connected. It is comprised by the cylindrical part.
  • the distal end side region 50 of the coupling base 35 has an outer diameter smaller than the inner diameter of the proximal end side region 46 of the most proximal end bending piece 24, and slides inside the most proximal end bending piece 24 along the central axis O. It has a function as a movable sliding part.
  • the tip end of the above-described guide sheath 41 is fixed to the inner periphery of the tip end side region 50 of the coupling base 35 (see FIG. 4).
  • the coupling cap 35 is provided with an engagement groove 52 that can receive and engage the head 47b of the rivet 47 held by the most proximal bending piece 24.
  • the engagement groove 52 is a through groove penetrating in the thickness direction of the coupling base 35, and a first groove portion 52 a that slides the head 47 b of the rivet 47 from one end side to the other end side of the coupling base 35,
  • the rivet 47 is constituted by a substantially L-shaped groove having a second groove portion 52b that slides the head portion 47b of the rivet 47 in a direction intersecting with the direction along the central axis O of the coupling base 35.
  • the first groove 52 a has substantially the same groove width as the head 47 b of the rivet 47, and is constituted by a groove extending along the central axis O from the distal end side to the proximal end side of the connection cap 35. .
  • One end of the first groove 52 a is opened at the tip of the connection base 35.
  • the extending direction of the first groove portion 52a does not necessarily coincide with the central axis O, and the main component of the extending direction may be the direction of the central axis O.
  • the second groove portion 52b basically has the same groove width as the head portion 47b of the rivet 47, and is configured by a groove portion extending along the circumferential direction of the coupling base 35 orthogonal to the central axis O. .
  • One end of the second groove portion 52b communicates with the other end of the first groove portion 52a.
  • the other end of the second groove portion 52b is closed in a bag shape, whereby an end face for abutting the head portion 47b of the rivet 47 is formed at the other end of the second groove portion 52b.
  • a narrowed portion 52c in which the groove width is partially narrowed is formed in the middle of the second groove portion 52b.
  • the extending direction of the second groove 52b is not necessarily required to be completely coincident with the direction orthogonal to the central axis O, and may be any direction in which the main component of the extending direction is orthogonal to the central axis O.
  • the engagement groove 52 having such a configuration is, for example, when the head portion 47b of the rivet 47 held by the most proximal end bending piece 24 is positioned at the other end of the second groove portion 52b (when it hits).
  • the pair of guide rings 24a provided on the most proximal end bending piece 24 and the distal ends of the guide sheaths 41 corresponding to the guide rings 24a are set so as to be positioned coaxially or substantially coaxially, respectively. Yes.
  • the pair of guide rings 24a has a function as a first receiving portion, and the pair of guide sheaths 41 corresponding to the pair of guide rings 24a functions as a second receiving portion.
  • the distal end of the spiral tube 30 covered with the blade 31 is coupled to the inner periphery of the proximal end side region 51 of the coupling base 35.
  • the outer peripheral surface of the distal end side region 50 of the coupling base 35 is pushed into the inner peripheral surface of the proximal end region 46 of the most proximal end bending piece 24 while sliding in the direction of the central axis O. 47b and the first groove portion 52a are slid, and the head portion 47b of the rivet 47 is relatively moved toward the base end side (the other end side) of the first groove portion 52a.
  • the inner peripheral surface of the proximal end side region 46 of the most proximal end bending piece 24 and the outer peripheral surface of the distal end side region 50 of the coupling base 35 are relatively rotated while sliding around the central axis O, whereby the rivet 47
  • the head 47b and the second groove 52b are slid, and the head 47b of the rivet 47 is relatively moved to the base end side (the other end side) of the second groove 52b.
  • the head portion 47b of the rivet 47 slides while elastically deforming in the diameter reducing direction at the throttle portion 52c, or the head portion 47c is slid while elastically deforming the periphery of the throttle portion 52c.
  • the pair of guide rings 24a provided on the most proximal end bending piece 24 and the pair of guide sheaths 41 corresponding to these guide rings 24a are arranged coaxially (see FIG. 2).
  • the proximal end side region 46 of the most proximal end bending piece 24 having the center axis O and the outer diameter smaller than the proximal end side region 46 of the most proximal end bending piece 24,
  • a distal end side region 50 of the coupling base 35 slidable inside the proximal end side region 46 of the most proximal end bending piece 24 along the axis O, and an inner peripheral surface of the proximal end side region 46 of the most proximal end bending piece 24.
  • the head portion 47b of the rivet 47 is accommodated to receive a base from the distal end side.
  • the first groove 52a to be slid to the end side and the first groove 52 are communicated, and the head 47b of the rivet 47 is accommodated and slid in a direction intersecting with the direction along the central axis O and slid
  • an endoscope such as a nasal endoscope needs to reduce the diameter of the insertion portion 2, but the head 47 b of the rivet 47 that engages with the engagement groove 52 is attached to the proximal end bending piece 24.
  • the head 47 b of the rivet 47 that engages with the engagement groove 52 is attached to the proximal end bending piece 24.
  • the coupling mechanism using the head 47b of the rivet 47 as a protrusion, the thickness of the proximal end bending piece 24 and the coupling base 35 cannot be screwed (that is, the thread cannot be formed). Even when the thickness is reduced to a small dimension), the connection between the most proximal bending piece 24 and the connection base 35 can be accurately realized.
  • a tongue piece 55 is projected at the proximal end of the most proximal bending piece 24, and this tongue piece It is also possible to form a protrusion (folded portion) by folding 55 to the inner peripheral side.
  • This configuration can further simplify the connection structure. Furthermore, the length of the proximal end region 51 in the direction of the central axis O can be shortened, and the length of the connection region in which bending or the like is impossible can be shortened.
  • the length of the proximal end region 51 in the direction of the central axis O is shortened and partially protruded from the proximal end region 51.
  • 57 can be formed, and the rivet 47 can be partly projected from the proximal end of the most proximal bending piece 24 and held.
  • the present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the technical scope of the present invention.
  • the example in which the tube connection structure of the present invention is applied to the insertion portion of the nasal endoscope has been described.
  • the present invention is not limited to this, and for example, the intranasal endoscope In addition to endoscopes, it may be applied to insertion parts of otolaryngological and urological endoscopes, and may also be applied to catheters having a curved portion composed of bending pieces other than endoscopes. Is possible.

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

Abstract

Selon la présente invention, une structure de connexion est configurée pour comprendre : la région côté extrémité de base 46 d'une pièce de courbure 24 située la plus proche d'une extrémité de base et ayant un axe central O ; la région côté extrémité avant 50 d'un raccord de connexion 35, qui a un diamètre externe plus petit que la région côté extrémité de base 46 de la pièce de courbure 24 la plus proche de l'extrémité de base et qui peut coulisser le long de l'axe central O dans la région côté extrémité de base 46 de la pièce de courbure 24 la plus proche de l'extrémité de base ; la section de tête 47b d'un rivet 47, qui est fixée de manière à faire saillie dans la direction de l'axe central O à partir de la surface périphérique interne de la région côté extrémité de base 46 de la pièce de courbure 24 la plus proche de l'extrémité de base ; une première section de rainure 52a qui est disposée dans la région côté extrémité avant 50 du raccord de connexion 35, contient la section de tête 47b du rivet 47, et permet à la section de tête 47b de coulisser du côté extrémité avant au côté extrémité de base ; et une seconde section de rainure 52b qui est en communication avec la première section de rainure, contient la section de tête 47b du rivet 47, permet à la section de tête 47b de coulisser dans une direction croisant la direction de l'axe central O, et a une surface d'extrémité contre laquelle la section de tête 47b coulissante est amenée à venir en butée.
PCT/JP2018/044757 2018-02-22 2018-12-05 Structure de raccordement de tuyau WO2019163252A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018029721 2018-02-22
JP2018-029721 2018-02-22

Publications (1)

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WO2019163252A1 true WO2019163252A1 (fr) 2019-08-29

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4890076U (fr) * 1972-02-04 1973-10-30
JPS57116610U (fr) * 1981-01-07 1982-07-20
JPS57187909U (fr) * 1981-05-25 1982-11-29
JPS59171168U (ja) * 1983-04-28 1984-11-15 沼田金属工業株式会社 フエンス類の胴縁連結装置
JP2006180933A (ja) * 2004-12-24 2006-07-13 Olympus Medical Systems Corp 手術用処置具
JP2013202304A (ja) * 2012-03-29 2013-10-07 Olympus Medical Systems Corp 挿入機器
JP2017148300A (ja) * 2016-02-25 2017-08-31 富士フイルム株式会社 内視鏡

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4890076U (fr) * 1972-02-04 1973-10-30
JPS57116610U (fr) * 1981-01-07 1982-07-20
JPS57187909U (fr) * 1981-05-25 1982-11-29
JPS59171168U (ja) * 1983-04-28 1984-11-15 沼田金属工業株式会社 フエンス類の胴縁連結装置
JP2006180933A (ja) * 2004-12-24 2006-07-13 Olympus Medical Systems Corp 手術用処置具
JP2013202304A (ja) * 2012-03-29 2013-10-07 Olympus Medical Systems Corp 挿入機器
JP2017148300A (ja) * 2016-02-25 2017-08-31 富士フイルム株式会社 内視鏡

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