WO2018066274A1 - Endoscope - Google Patents

Endoscope Download PDF

Info

Publication number
WO2018066274A1
WO2018066274A1 PCT/JP2017/031213 JP2017031213W WO2018066274A1 WO 2018066274 A1 WO2018066274 A1 WO 2018066274A1 JP 2017031213 W JP2017031213 W JP 2017031213W WO 2018066274 A1 WO2018066274 A1 WO 2018066274A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
ring
base
longitudinal axis
peripheral side
Prior art date
Application number
PCT/JP2017/031213
Other languages
English (en)
Japanese (ja)
Inventor
多惠 三ッ谷
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 WO2018066274A1 publication Critical patent/WO2018066274A1/fr

Links

Images

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
    • A61B1/005—Flexible endoscopes
    • 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 an endoscope provided with a flexible tube having a spiral tube and an outer skin covering the outer peripheral side of the spiral tube.
  • Japanese Patent Application Laid-Open No. 2004-329857 discloses an endoscope in which a flexible tube having a spiral tube and a sheath covering the outer peripheral side of the spiral tube is provided in the insertion portion.
  • both ends of the spiral tube are fixed to the base via an adhesive or the like in the direction along the longitudinal axis.
  • a bending portion is connected to one end side of the flexible tube in the direction along the longitudinal axis via a base, and an operation portion is connected to the other end side of the flexible tube in the direction along the longitudinal axis via the base. Connected.
  • An object of the present invention is to provide an endoscope in which an end portion of a spiral tube is securely fixed to a base, and a flexible tube is appropriately and firmly connected to another part through the base. .
  • an endoscope includes a spiral tube including a belt member wound spirally around an axis of a longitudinal axis, and an outer skin that covers an outer peripheral side of the spiral tube.
  • a flexible tube connected to one side in the direction along the longitudinal axis with respect to the flexible tube, the spiral tube being fixed to the outer periphery, and the spiral tube on the outer periphery of the mouthpiece
  • a ring provided on the outer peripheral side of the fixed portion, and a flexible tube that covers the outer peripheral side of the ring and keeps the fluid tight with the outer skin of the flexible tube.
  • FIG. 1 is a schematic diagram illustrating an endoscope according to the first embodiment.
  • FIG. 2 is a cross-sectional view schematically showing a configuration of a connection portion to the bending portion of the flexible tube portion according to the first embodiment.
  • FIG. 3 is a perspective view schematically showing the configuration of the ring according to the first embodiment.
  • FIG. 4 is a perspective view schematically showing a configuration of a ring according to a first modification of the first embodiment.
  • FIG. 5 is a cross-sectional view schematically showing a configuration of a connection portion to the bending portion of the flexible tube portion according to the second modification of the first embodiment.
  • FIG. 1 is a schematic diagram illustrating an endoscope according to the first embodiment.
  • FIG. 2 is a cross-sectional view schematically showing a configuration of a connection portion to the bending portion of the flexible tube portion according to the first embodiment.
  • FIG. 3 is a perspective view schematically showing the configuration of the ring according to the first embodiment.
  • FIG. 4 is
  • FIG. 6 is a cross-sectional view schematically showing a configuration of a connection portion to the bending portion of the flexible tube portion according to the third modification of the first embodiment.
  • FIG. 7 is a cross-sectional view schematically showing a configuration of a connection portion of the flexible tube portion to the operation portion according to the second embodiment.
  • FIG. 8 is a cross-sectional view schematically showing a connection configuration between the base end portion of the flexible tube portion and the base according to the second embodiment.
  • FIG. 1 is a diagram illustrating an endoscope 1 according to the present embodiment.
  • the endoscope 1 includes an elongated insertion portion 2, an operation portion 3 that can be held, and an elongated universal cord 5.
  • the insertion part 2 has a longitudinal axis C as a central axis.
  • one side in the direction along the longitudinal axis C is defined as the distal end side (arrow C1 side), and the opposite side to the distal end side is defined as the proximal end side (arrow C2 side).
  • the distal end configuration portion 6 the bending portion 7, and the flexible tube portion 8 are disposed in order from the distal end side.
  • the tip configuration part 6 forms the tip of the insertion part 2.
  • the flexible tube portion 8 forms the proximal end of the insertion portion 2, and the operation portion 3 is connected to the proximal end side of the flexible tube portion 8.
  • the flexible tube portion 8 is a flexible tube that is formed in an elongated shape along the longitudinal axis C and has flexibility.
  • the universal cord 5 has a longitudinal axis C ′ as a central axis.
  • the end of one side (arrow C'1 side) of the universal cord 5 in the direction along the longitudinal axis C ' is connected to the operation unit 3.
  • the scope connector 9 is provided in the edge part of the other side (arrow C'2 side) about the direction along the longitudinal axis C '.
  • the universal cord 5 is detachably connected to a peripheral device (not shown) used together with the endoscope 1 via the scope connector 9. Examples of the peripheral device include known devices such as an image processing device, a light source device, a display device, an air supply device, a liquid supply device, and a suction device.
  • the universal cord 5 is a flexible tube which is formed in an elongated shape along the longitudinal axis C ′ and has flexibility.
  • a light guide (not shown) is extended through the inside of the insertion portion 2, the inside of the operation portion 3, and the inside of the universal cord 5, as in a known endoscope. .
  • the light emitted from the light source device is guided through a light guide.
  • the light guided to the subject is irradiated through an illumination window (not shown) provided on the outer surface of the tip component 6.
  • an imaging element such as a CCD or a CMOS is built in the distal end configuration portion 6, similarly to a known endoscope.
  • the imaging element images a subject illuminated with illumination light through an observation window (not shown) provided on the outer surface of the tip component 6.
  • an imaging signal is transmitted from the imaging element to the above-described image processing device via an imaging cable (not shown) that extends through the inside of the insertion unit 2, the operation unit 3, and the universal cord 5.
  • an imaging cable (not shown) that extends through the inside of the insertion unit 2, the operation unit 3, and the universal cord 5.
  • an image of the subject is generated by the image processing device, and the generated image is displayed on the display device.
  • the bending portion 7 includes a bending tube 11.
  • a plurality of pieces 12 are continuously provided in the direction along the longitudinal axis C.
  • Each of the pieces 12 is formed in a tubular shape, and is connected to the adjacent piece 12 in a direction along the longitudinal axis C so as to be rotatable.
  • the piece 12 is preferably made of metal, and examples of the metal include SUS (stainless steel).
  • the bending portion 7 includes a cylindrical bending portion outer skin 13 that covers the outer peripheral side of the bending tube 11.
  • the bending portion outer skin 13 forms the outer surface of the bending portion 7 and is exposed to the outside.
  • the curved portion outer skin 13 is made of rubber, for example. Examples of the rubber material include fluorine rubber and silicone rubber. Therefore, the bending portion outer skin 13 becomes a flexible tube.
  • the operation unit 3 is provided with a bending knob 15 as a bending operation input unit.
  • a plurality of bending wires (not shown) are extended from the proximal end side to the distal end side inside the flexible tube portion 8 and the bending portion 7.
  • Each distal end (one end) of the bending wire is connected to, for example, a piece 12 positioned closest to the distal end in the bending tube 11.
  • each base end (the other end) of the bending wire is connected to, for example, a pulley or the like connected to the bending knob 15 in the operation unit 3.
  • Each of the bending wires is inserted through a corresponding coil pipe (not shown).
  • Each of the coil pipes has a distal end fixed to the proximal end portion of the bending tube 11 or the distal end portion of the flexible tube portion 8 and a proximal end fixed to the operation portion 3.
  • the bending wire moves along the longitudinal axis C.
  • each of the pieces 12 rotates with respect to the adjacent piece 12 in the direction along the longitudinal axis C, and the bending portion 7 is bent in the direction intersecting the longitudinal axis C. Therefore, the bending portion 7 is bent in the direction intersecting the longitudinal axis C when the operating force is transmitted from the operation portion 3, that is, the outside of the bending portion 7.
  • two bending wires may be provided, and the bending portion 7 may be bent in two directions intersecting the longitudinal axis C.
  • four bending wires are provided.
  • the bending portion 7 may be bendable in four directions intersecting the longitudinal axis C.
  • the bending portion 7 is actively bent by transmitting an operating force from the outside.
  • the bending tube 11 is passively applied to the bending portion 7 by an external force from the lumen wall.
  • a passive bending portion that is curved may be provided.
  • FIG. 2 is a diagram illustrating a configuration of a connection portion of the flexible tube portion 8 that is a flexible tube to the bending portion 7.
  • the flexible tube portion 8 includes a spiral tube 21, a mesh tube 22, and an outer skin 23 in order from the inner peripheral side.
  • the band member 25 is spirally wound around the longitudinal axis C.
  • the material of the band member 25 forming the spiral tube 21 is preferably a metal, and examples of the metal include SUS (stainless steel).
  • the outer skin 23 covers the outer peripheral side of the spiral tube 21 and is made of resin. Examples of the resin forming the outer skin 23 include urethane resin. Further, the outer skin 23 forms the outer surface of the flexible tube portion 8.
  • the mesh tube 22 is provided between the spiral tube 21 and the outer skin 23 in the radial direction, and extends along the longitudinal axis C.
  • the mesh tube 22 includes a plurality of fibers 26 and is formed in a tube shape in which the plurality of fibers 26 are knitted.
  • the material of the fiber 26 of the mesh tube 22 is preferably, for example, metal or resin, and examples of the metal include SUS (stainless steel).
  • the flexible tube portion 8 is connected to the bending portion 7 through a cylindrical base 30.
  • the base 30 is formed of a metal such as SUS, for example, and is integrally formed in the present embodiment.
  • the base 30 is connected to the distal end side which is one side in the direction along the longitudinal axis C with respect to the flexible tube portion 8.
  • One end of the spiral tube 21 in the direction along the longitudinal axis C, that is, the tip of the spiral tube 21 is fixed to the outer periphery of the base 30.
  • the spiral tube 21 is fixed to the outer periphery of the base 30 by any one of adhesive, soldering, brazing, and the like.
  • the spiral tube 21 is fixed to the outer periphery of the base 30 by the adhesive 28. It is preferable.
  • the adhesive 28 include an epoxy resin.
  • a step surface 31 that forms a step in the radial direction is provided on the outer periphery of the base 30.
  • the step surface 31 faces the flexible tube portion 8 side, that is, the proximal end side in the direction along the longitudinal axis C.
  • the distance from the longitudinal axis C is small compared with the site
  • the distal end of the spiral tube 21 contacts the step surface 31 from the proximal end side.
  • the spiral tube 21 is fixed to the base end side from the step surface 31, that is, the site on the soft tube portion 8 side from the step surface 31.
  • the tip of the mesh tube 22 covers the outer peripheral side of the portion fixed to the outer periphery of the base 30 in the spiral tube 21.
  • the distal end of the mesh tube 22 comes into contact with the step surface 31 from the proximal end side.
  • the mesh tube 22 is fixed to the outer periphery of the spiral tube 21 and the base 30 by an adhesive 28.
  • the mesh tube 22 may be fixed to the outer periphery of the spiral tube 21 and the base 30 by soldering or brazing.
  • a ring 33 is attached to the outer peripheral side of the portion fixed to the outer periphery of the base 30 in the spiral tube 21.
  • the ring 33 is preferably made of metal, and examples of the metal include SUS (stainless steel).
  • the ring 33 is provided on the further outer peripheral side of the mesh tube 22.
  • the ring 33 is located on the proximal end side with respect to the stepped surface 31 and is located on the distal end side with respect to the proximal end of the base 30.
  • the ring 33 is fixed to the spiral tube 21 and the mesh tube 22 coaxially or substantially coaxially with the base 30, that is, coaxially or substantially coaxially with the longitudinal axis C.
  • the ring 33 is fixed to the spiral tube 21 and the mesh tube 22 by any one of an adhesive, soldering, brazing, and the like.
  • the ring 33 is attached to the spiral tube 21 by the adhesive 28. It is preferable to be fixed to the mesh tube 22.
  • FIG. 3 is a diagram showing the configuration of the ring 33.
  • the ring 33 is formed by connecting two ring components 35A and 35B. That is, the ring 33 can be divided into two ring components 35A and 35B about the axis of the longitudinal axis C (the central axis of the ring 33).
  • the ring structure 35A extends around the longitudinal axis C, for example, over a range of 180 ° or approximately 180 °.
  • the ring structure 35B is extended over a range of 180 ° or approximately 180 ° different from the ring structure 35A around the longitudinal axis C.
  • the ring 33 has an outer periphery 36, and the outer periphery 36 is formed on a smooth or substantially smooth surface.
  • the ring 33 may be integrally formed.
  • the ring 33 may be divisible into three or more ring structures about the longitudinal axis C.
  • the bending portion side base 37 is connected to the distal end side of the base 30.
  • the bending portion side base 37 is made of, for example, metal, and is connected to the base end side with respect to the piece 12 positioned closest to the base end side in the bending tube 11.
  • the curved portion side base 37 abuts on the outer periphery of the base 30 at a portion on the tip side from the step surface 31 and is fixed to the base 30.
  • the outer peripheral surface of the coupling body of the ring 33, the base 30 and the bending portion side base 37 is smooth or substantially smooth. Preferably it is formed.
  • the bending portion side base 37 is not provided, and the most proximal piece 12 may be directly connected to the base 30 from the distal end side. In this case, the piece 12 on the most proximal side comes into contact with the outer periphery of the base 30 at the tip side of the step surface 31 and is fixed to the base 30.
  • the bending portion outer skin (tube) 13 covers the outer peripheral side of the ring 33 and the outer peripheral side of the bending portion side base 37.
  • the proximal end of the bending portion outer skin 13 is located on the proximal end side with respect to the ring 33 and is located on the distal end side with respect to the proximal end of the base 30.
  • the outer periphery of the ring 33 is covered with the bending portion skin 13 over the entire length from the base end to the tip end in the direction along the longitudinal axis C. Therefore, in the range in which the ring 33 is extended, the base 30, the spiral tube 21, the mesh tube 22, the ring 33, and the bending portion outer skin 13 are arranged in this order from the inner peripheral side.
  • the ring 33 is fixed to the inner periphery of the curved portion outer skin 13 with, for example, an adhesive 28.
  • the ring 33 may be fixed to the inner periphery of the curved outer skin 13 by soldering or brazing instead of the adhesive 28.
  • the outer skin 23 of the flexible tube portion (flexible tube) 8 extends from the base end of the base 30 to the distal end side portion. For this reason, the front end of the outer skin 23 is located on the front end side from the base end of the base 30.
  • the distal end of the outer skin 23 is located at the same or substantially the same position as the proximal end of the bending portion outer skin 13 in the direction along the longitudinal axis C, and faces the proximal end of the bending portion outer skin 13 from the proximal end side.
  • tip part of the outer skin 23 which is one end part of the outer skin 23 is adjacently provided in the base end side about the direction along the longitudinal axis C with respect to the site
  • the distal end of the outer skin 23 is located on the proximal end side with respect to the distal end of the spiral tube 21, the distal end of the mesh tube 22, and the ring 33. Because of the configuration as described above, between the base end of the base 30 and the tip of the outer skin 23 in the direction along the longitudinal axis C, the base 30, the spiral tube 21, the mesh tube 22, and the outer skin 23 are formed from the inner peripheral side. Arranged in order.
  • a thread 41 is wound around the outer periphery of a portion covering the outer peripheral side of the ring 33 in the bending portion outer skin (tube) 13 and the outer periphery of the distal end portion of the outer skin 23 (one end portion of the outer skin 23). That is, the thread 41 is wound around the outer periphery of the bending portion outer skin 13 and the outer periphery of the outer skin 23 in the range from the distal end portion of the outer skin 23 to the proximal end portion of the bending portion outer skin 13 in the direction along the longitudinal axis C. At the site where the thread 41 is wound, the bending portion outer skin 13 and the outer skin 23 of the flexible tube portion 8 are bound.
  • the outer periphery of the bending portion outer skin 13 and the outer periphery of the outer skin 23 are covered with a layer of the adhesive 42.
  • the adhesive 42 include an epoxy resin.
  • the boundary between the outer skin 23 and the curved portion outer skin 13, that is, the gap between the proximal end of the curved portion outer skin 13 and the distal end of the outer skin 23 is kept liquid-tight by the thread 41 and the adhesive 42. . That is, the thread 41 and the adhesive 42 are liquid-tight between the one end portion of the outer skin 23 and the portion covering the outer peripheral side of the ring 33 in the bending portion outer skin 13 in the direction along the longitudinal axis C. Thereby, the inflow of the liquid from the outside of the insertion part 2 through the space between the outer skin 23 and the bending part outer skin 13 to the inside of the insertion part 2 is prevented.
  • the bending portion 7 is connected to the distal end side of the flexible tube portion 8, which is a flexible tube, via a base 30.
  • the spiral tube 21 is fixed to the outer periphery of the base 30 with an adhesive 28 or a screw.
  • the spiral tube 21 is fixed to the outer periphery of the base 30 at the base end side of the step surface 31. Since the spiral tube 21 is fixed to the outer peripheral side of the base 30, the operator can easily visually confirm whether or not the adhesive 28 or the like is uniformly applied to the base 30.
  • the spiral tube 21 is fixed to the base 30 in a state where the adhesive 28 or the like is uniformly applied to the base 30, the distal end portion of the spiral tube 21 is securely fixed to the outer periphery of the base 30.
  • the tip of the mesh tube 22 is fixed with an adhesive 28 or the like on the outer peripheral side of the portion fixed to the outer periphery of the base 30 in the spiral tube 21.
  • the ring 33 is fixed with an adhesive 28 or the like on the outer peripheral side of the portion fixed to the outer periphery of the base 30 in the spiral tube 21 and on the outer peripheral side of the mesh tube 22.
  • the ring 33 is fixed to the outer peripheral side of the mesh tube 22 without crimping the ring 33. For this reason, excessive tightening force is prevented from being applied to the mesh tube 22 by the ring 33, and damage to the tip of the mesh tube 22 is effectively prevented.
  • the ring 33 is comprised from two ring structure 35A, 35B.
  • each of the ring constituting bodies 35A and 35B is attached from the outer peripheral side, that is, from the direction intersecting the longitudinal axis C. Is possible. Accordingly, the ring 33 is easily attached to the outer peripheral side of the portion fixed to the outer periphery of the base 30 in the spiral tube 21 and to the outer peripheral side of the mesh tube 22.
  • the inner peripheral surfaces of the ring constituent members 35A and 35B are moved along the longitudinal axis C by bringing the end portions of the ring constituent members 35A in the circumferential direction closer to the corresponding ones of the end portions of the ring constituent members 35B in the circumferential direction. Move toward the inner circumference.
  • ring structure 35A, 35B is connected and the ring 33 is formed.
  • the coupling body of the base 30, the spiral tube 21, and the mesh tube 22 is inserted into the ring 33 from the tip side.
  • the ring 33 is moved to the base end side with respect to the base 30, the spiral tube 21, and the mesh tube 22 until the ring 33 is positioned on the outer peripheral side of the portion fixed to the outer periphery of the base 30 in the spiral tube 21.
  • the ring 33 is attached to the flexible tube portion 8.
  • the ring 33 is formed from the two ring structures 35A and 35B, and the ring structures 35A and 35B are attached to the flexible tube portion (flexible tube) 8 from the outer peripheral side. For this reason, compared with the case where a ring is integrated and it is necessary to insert a built-in object such as a cable and a cap 30 into the ring, the ring 33 can be reduced in diameter without being crimped. . As a result, it is possible to reduce the diameter of the portion of the flexible tube portion 8 connected to the bending portion 7 via the base 30.
  • the bending portion side base 37 is attached to the base 30 from the distal end side. Then, the outer peripheral side of the ring 33 is covered with the bending portion outer skin 13 which is a tube, and the ring 33 is fixed to the inner periphery of the bending portion outer skin 13 with an adhesive 28 or the like. Thereby, the front-end
  • the thread 41 is wound around the outer periphery of the portion covering the outer peripheral side of the ring 33 in the bending portion outer skin 13 and the outer periphery of the distal end portion of the outer skin 23.
  • yarn 41 is wound in the outer periphery of the bending part outer skin 13 and the outer periphery of the outer skin 23 is covered with the layer of the adhesive agent 42.
  • FIG. Thereby, between the one end part of the outer skin 23 and the site
  • the mesh tube 22 is covered on the outer peripheral side of the portion fixed to the base 30 of the spiral tube 21, and the outer periphery side of the mesh tube 22 is covered with the ring 33.
  • the ring 33 becomes a base of a portion around which the thread 41 is wound on the outer periphery of the bending portion outer skin 13.
  • the outer periphery 36 of the ring 33 is a smooth or substantially smooth surface. For this reason, it is effectively prevented that an uneven surface is formed on the base of the portion around which the yarn 41 is wound on the outer periphery of the bending portion outer skin 13. Accordingly, the thread 41 is appropriately wound around the outer periphery of the bending portion outer skin 13, and the bending portion outer skin 13 is appropriately bound by the thread 41. Therefore, the curved portion outer skin 13 is firmly attached to the flexible tube portion 8 and the base 30.
  • the insertion portion 2 When observing a lumen using the endoscope 1, the insertion portion 2 is inserted into the lumen. Then, the subject is irradiated with the light guided by the light guide described above, and the lumen is observed while the subject is imaged by the image sensor.
  • a large external force may act on the insertion portion 2 when the insertion portion 2 passes through a bent portion or the like of the lumen.
  • a large external force is applied to the insertion portion 2, there is a possibility that the adhesion between the base 30 and the spiral tube 21 by the adhesive 28 or the like may be lowered, for example.
  • the ring 33 is attached to the outer peripheral side of the portion fixed to the base 30 in the spiral tube 21.
  • the spiral tube 21 and the mesh tube 22 are sandwiched between the base 30 and the ring 33 in the radial direction, and the flexible tube 21 and the mesh tube 22 are included via the base 30 and the ring 33.
  • the tube portion (flexible tube) 8 is appropriately and firmly connected to the bending portion 7 which is another portion. Therefore, even if the adhesion between the cap 30 and the spiral tube 21 is reduced by an external force or the like, the spiral tube 21 and the mesh tube 22 are sandwiched between the cap 30 and the ring 33.
  • the tube 22 is appropriately connected to the bending portion 7 via the base 30. That is, even when an external force is applied, the connection between the bending portion 7 and the flexible tube portion 8 via the base 30 is reliably maintained.
  • the ring 33 is formed of two ring structural bodies 35 ⁇ / b> A and 35 ⁇ / b> B as in the first embodiment.
  • an engagement protrusion 43A and an engagement groove 45A are formed at one end of the ring structure 35A around the longitudinal axis C.
  • an engagement protrusion 43B and an engagement groove 45B are formed on the other end of the ring structure 35A about the longitudinal axis C.
  • an engagement protrusion 47A and an engagement groove 48A are formed at one end of the ring structure 35B about the longitudinal axis C.
  • An engagement protrusion 47B and an engagement groove 48B are formed at the other end of the ring structure 35B around the longitudinal axis C.
  • Each of the engagement protrusions 43A and 43B engages with a corresponding one of the engagement grooves 48A and 48B, and each of the engagement protrusions 47A and 47B engages with a corresponding one of the engagement grooves 45A and 45B.
  • the ring structures 35A and 35B are connected to form the ring 33.
  • the ring components 35A and 35B are connected as described above, and therefore the movement of the ring members 35A and 35B in the direction along the longitudinal axis C in the ring 33 is restricted. Therefore, in the ring 33, the ring structural bodies 35A and 35B are prevented from being displaced from each other in the direction along the longitudinal axis C.
  • the flange 51 which protrudes in an outer peripheral side is provided in the nozzle
  • FIG. 5 shows a configuration of a connection portion of the flexible tube portion 8 to the bending portion 7 in this modification, and the bending portion outer skin 13, the thread 41, and the adhesive 42 are omitted.
  • the above-described step surface 31 is formed by the base end surface of the flange 51. Therefore, in this modification, the spiral tube 21 and the mesh tube 22 are fixed to the outer periphery of the base 30 at the base end side portion with respect to the flange 51.
  • the ring 33 is attached to the outer peripheral side of the portion fixed to the outer periphery of the base 30 in the spiral tube 21 and to the outer peripheral side of the mesh tube 22.
  • the step surface 52 is formed by the tip surface of the flange 51. The step surface 52 forms a step in the radial direction and faces the tip side.
  • the tip of the ring 33 is located on the tip side with respect to the flange 51 and the step surface 52.
  • the ring 33 is provided with a contact surface 53 that contacts the step surface 52 of the flange 51 from the front end side.
  • the operator determines that the ring 33 is positioned at a desired position in the direction along the longitudinal axis C based on the contact surface 53 contacting the step surface 52. to decide. That is, the ring 33 is positioned in the direction along the longitudinal axis C based on the step surface 52 and the contact surface 53. Thereby, in manufacture of the insertion part 2, the ring 33 is attached to an appropriate position.
  • the contact surface 53 contacts the stepped surface 52, thereby restricting the movement of the ring 33 toward the base end side with respect to the base 30. That is, when the ring 33 abuts on the flange 51, the movement of the ring 33 in the direction along the longitudinal axis C is restricted. For this reason, for example, when the endoscope 1 is used, the ring 33 is effectively prevented from being displaced in the direction along the longitudinal axis C with respect to the base 30, the spiral tube 21, and the mesh tube 22.
  • the tip of the ring 33 is located on the tip side of the flange 51, so that a configuration in which the bending portion side base 37 is provided adjacent to the tip of the ring 33 can be realized.
  • the outer diameter of the ring 33 and the outer diameter of the curved portion side base 37 are kept constant or substantially constant.
  • die 30 is formed from the cylindrical 1st nozzle
  • FIG. FIG. 6 shows a configuration of a connecting portion of the flexible tube portion 8 to the bending portion 7 in this modification, and the bending portion outer skin 13, the thread 41, and the adhesive 42 are omitted.
  • the second base component 56 is opposite to the side where the flexible tube (flexible tube) 8 is located in the direction along the longitudinal axis C with respect to the first base component 55. That is, it is connected to the bending portion 7 side.
  • the step surface 31 is formed by the base end surface of the second base structure 56. Therefore, in this modification, the spiral tube 21 and the mesh tube 22 are fixed to the outer periphery of the first base component 55.
  • the ring 33 is located on the base end side with respect to the base end of the second base structure 56 that is the step surface 31. Further, the curved portion side base 37 abuts on the outer periphery of the second base configuration body 56 at the tip side of the step surface 31.
  • the first base structure 55 can be formed into a simple shape such as a cylindrical shape having a constant or substantially constant inner diameter and outer diameter, for example. Become. Since the first base structure 55 has a simple shape, the first base structure 55 can be formed even from a hard material that is generally considered difficult to process.
  • the structural body 55 can be formed from a material harder than the second base structural body 56. In this case, it is preferable that the 1st nozzle
  • Examples of the metal forming the first base structure 55 include SUS, and examples of the metal forming the second base structure 56 include SUS or aluminum alloy that is softer than the first base structure 55.
  • the first base component 55 in which the distal end portion of the spiral tube 21 and the distal end portion of the mesh tube 22 are fixed to the outer periphery is formed of a hard material, so that a flexible tube portion including the spiral tube 21 and the mesh tube 22 (possible (Flexible tube) 8 is not easily crushed.
  • resin may be applied to the mesh tube 22, and the mesh tube 22 may be fixed to the inner periphery of the ring 33 by the applied resin.
  • the outer periphery 36 of the ring 33 may be roughened so that the curved portion outer skin 13 is easily adhered to the ring 33.
  • the outer surface 36 is roughened to such an extent that an uneven surface is not formed on the outer periphery 36, and the influence of the rough surface treatment on the outer periphery 36 with respect to the work of winding the yarn 41 is small.
  • the mesh tube 22 may not be provided.
  • the flexible tube portion (flexible tube) 8 is formed from the spiral tube 21 and the outer skin 23.
  • a ring 33 is directly fixed to the spiral tube 21 from the outer peripheral side at a portion fixed to the outer periphery of the base 30 in the spiral tube 21.
  • the outer peripheral side of the ring 33 is covered with a curved portion outer skin (tube) 13.
  • FIG. 7 is a diagram illustrating a configuration of a connection portion of the flexible tube portion (flexible tube) 8 of the present embodiment to the operation unit 3.
  • the operation portion side base 61 is connected to the frame 60 provided in the operation portion 3 from the distal end side.
  • the frame 60 and the operation unit side base 61 are preferably formed of, for example, metal.
  • the operation unit side base 61 is connected to the frame 60 while being inserted into the frame 60 from the distal end side.
  • a ring-shaped seal member 62 is disposed between the inner periphery of the frame 60 and the outer periphery of the operation unit side base 61. The seal member 62 keeps the space between the inner periphery of the frame 60 and the outer periphery of the operation unit side base 61 liquid-tight.
  • the cylindrical folding member 63 is provided in the connection part to the operation part 3 of the soft pipe part (flexible pipe) 8 (refer FIG. 1).
  • the folding member 63 includes a folding body 67 and a connecting pipe portion 66.
  • the connecting pipe portion 66 is preferably made of, for example, metal.
  • the folding main body 67 is a flexible tube formed from, for example, resin.
  • the connecting pipe portion 66 covers the outer peripheral side of the frame 60 and the outer peripheral side of the operation portion side base 61, and the folding main body 67 covers the outer peripheral side of the connecting pipe portion 66.
  • the connecting pipe portion 66 abuts on the outer periphery of the frame 60.
  • a ring-shaped seal member 65 is provided between the inner periphery of the connecting pipe portion 66 and the outer periphery of the operation unit side base 61.
  • the seal member 65 keeps the space between the inner periphery of the connecting pipe portion 66 of the folding stop member 63 and the outer periphery of the operation portion side base 61 liquid-tight.
  • the base 70 is connected to the operation unit side base 61 from the tip side.
  • the base 70 is made of, for example, metal and extends along the longitudinal axis C. Examples of the metal constituting the base 70 include SUS.
  • the base 70 With the base end portion of the base 70 inserted into the operation unit side base 61, the base 70 is connected to the operation unit side base 61. Further, a soft tube portion (flexible tube) 8 is connected to the base 70 from the tip side. Therefore, the flexible tube portion 8 is connected to the operation portion 3 which is another portion via the cylindrical base 70.
  • FIG. 8 is a diagram showing a connection configuration between the base end portion of the flexible tube portion (flexible tube) 8 and the base 70.
  • the proximal end portion of the spiral tube 21 is fixed to the outer periphery of the distal end portion of the base 70.
  • the spiral tube 21 is fixed to the outer periphery of the base 70 by an adhesive 72, soldering or brazing.
  • the adhesive 72 for example, an epoxy resin or the like can be used in the same manner as the adhesive 28.
  • the proximal end portion of the mesh tube 22 covers the outer peripheral side of the portion fixed to the outer periphery of the base 70 in the spiral tube 21.
  • the mesh tube 22 is fixed to the outer periphery of the spiral tube 21 and the base 70 with an adhesive 72 or the like.
  • a ring 71 is attached to the outer peripheral side of the portion fixed to the outer periphery of the base 70 in the spiral tube 21 and to the outer peripheral side of the mesh tube 22.
  • the ring 71 has the same configuration as that of the ring 33 described above, and is preferably formed of, for example, metal. An example of such a metal is SUS.
  • the ring 71 is located on the proximal end side with respect to the distal end of the base 70.
  • the ring 71 is fixed to the spiral tube 21 and the mesh tube 22 coaxially or substantially coaxially with the base 70, that is, coaxially or substantially coaxially with the longitudinal axis C.
  • the ring 71 is fixed to the spiral tube 21 and the mesh tube 22 by any one of an adhesive, soldering, brazing, and the like.
  • the ring 71 is connected to the spiral tube 21 by the adhesive 72. It is preferable to be fixed to the mesh tube 22.
  • the outer skin 23 of the flexible tube portion (flexible tube) 8 is extended from the distal end of the base 70 to the proximal end portion. For this reason, the base end of the outer skin 23 is located closer to the base end side than the tip end of the base 70. In the present embodiment, the base end of the outer skin 23 is located at the same or substantially the same position as the tip of the ring 71 in the direction along the longitudinal axis C. For this reason, the base end portion of the outer skin 23, which is one end portion of the outer skin 23, is adjacent to the distal end side in the direction along the longitudinal axis C with respect to the ring 71. However, the proximal end of the outer skin 23 is located on the distal end side with respect to the proximal end of the spiral tube 21 and the proximal end of the mesh tube 22.
  • the folding main body (tube) 67 of the folding member 63 covers the outer peripheral side of the ring 71 and the outer peripheral side of the base end portion of the outer skin 23.
  • the outer periphery of the ring 71 is covered by the folding main body 67 over the entire length from the proximal end to the distal end in the direction along the longitudinal axis C. Therefore, in the range where the ring 71 is extended, the base 70, the spiral tube 21, the mesh tube 22, the ring 71, and the clasp body 67 are arranged in this order from the inner peripheral side.
  • the inner periphery of the clasp body 67 is in close contact with the outer periphery of the ring 71. As a result, the space between the inner periphery of the clasp body 67 and the outer periphery of the ring 71 is kept liquid-tight.
  • the folding main body 67 comes into close contact with the ring 71 from the outer peripheral side, the inner circumference of the folding main body (tube) 67 also comes into close contact with the outer circumference of the base end portion of the outer skin 23. For this reason, the folding main body 67 is kept liquid-tight also between the inner periphery of the folding main body 67 and the outer periphery of the outer skin 23. As described above, the space between the inner periphery of the clasp body 67 and the outer periphery of the ring 71 is kept fluid-tight, so that the insertion portion 2 can be inserted from the outside of the insertion portion 2 through the space between the outer shell 23 and the folding member 63. The liquid is prevented from flowing into the interior.
  • the spiral tube 21 is fixed to the outer periphery of the base 70 in the same manner as the fixing of the spiral tube 21 to the base 30.
  • the ring 71 similar to the ring 33 is fixed to the outer peripheral side of the site
  • the folding main body 67 which is a flexible tube like the bending portion outer skin 13, covers the outer peripheral side of the ring 71. Instead of using the thread 41 and the adhesive 42, the folding main body 67 is in close contact with the outer skin 23, so that the space between the folding main body 67 and the outer skin 23, which is the same tube as the bending portion outer skin 13, is maintained. It is. Therefore, also in this embodiment, there exists an effect
  • Modification of the second embodiment Note that the modification described above in the modification of the first embodiment can also be applied to a configuration in which the flexible tube (flexible tube) 8 is connected to the operation unit 3 as in the second embodiment.
  • the universal cord 5 is formed of a spiral tube similar to the spiral tube 21, a mesh tube similar to the mesh tube 22, and an outer shell similar to the outer skin 23, or the above-described mesh shape.
  • the tube is not provided and is formed from the aforementioned spiral tube and skin.
  • tube) 8 to the operation part 3 like 2nd Embodiment is the one side of the universal cord (flexible pipe
  • the present invention can also be applied to a configuration in which the end on the arrow C′1 side in FIG. In this case, a base similar to the base 70 and a similar ring of the ring 71 are used, and a folding member 73 (see FIG. 1) including a folding main body (tube) similar to the folding main body 67 is used.
  • the configuration in which the flexible tube portion (flexible tube) 8 is connected to the operation portion 3 as in the second embodiment is the other side of the universal cord (flexible tube) 5 in the direction along the longitudinal axis C ′.
  • the present invention can also be applied to a configuration in which the end of the arrow C′2 side in FIG. In this case, a base similar to the base 70 and a ring similar to the ring 71 are used, and a folding member 75 (see FIG. 1) including a folding main body (tube) similar to the folding main body 67 is used.
  • the flexible tube (8; 5) of the endoscope (1) includes a belt member (25) wound spirally around the axis of the longitudinal axis (C) ( 21) and a skin (23) covering the outer peripheral side of the spiral tube (21).
  • a base (30; 70) is connected to one side of the flexible tube (8; 5) in the direction along the longitudinal axis (C), and a spiral tube (30; 70) is connected to the outer periphery of the base (30; 70). 21) is fixed.
  • a ring (33; 71) is provided on the outer peripheral side of the portion fixed to the outer periphery of the base (30; 70) in the spiral tube (21).
  • the flexible tube (13; 67) covers the outer peripheral side of the ring (33; 71), and the outer skin (23) of the flexible tube (8; 5) and the tube (13; 67). The space is kept liquid tight.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage.
  • the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained.
  • the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

Landscapes

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

Abstract

Cet endoscope comprend un tuyau flexible pourvu d'un tuyau en spirale dans lequel un élément de ruban est enroulé autour de l'axe longitudinal en forme de spirale et un revêtement externe qui recouvre le côté circonférentiel externe du tuyau en spirale. Un embout buccal est relié au tuyau flexible d'un côté dans une direction le long de l'axe longitudinal et le tuyau en spirale est fixé à la circonférence externe de l'embout buccal. Une bague est disposée sur le côté circonférentiel externe du tuyau en spirale au niveau de l'emplacement où le tuyau en spirale est fixé à la circonférence externe de l'embout buccal. Un tube présentant une certaine flexibilité recouvre le côté circonférentiel externe de la bague et un espace entre le revêtement externe du tuyau flexible et le tube est maintenu étanche aux fluides.
PCT/JP2017/031213 2016-10-06 2017-08-30 Endoscope WO2018066274A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-198161 2016-10-06
JP2016198161A JP2020014487A (ja) 2016-10-06 2016-10-06 内視鏡

Publications (1)

Publication Number Publication Date
WO2018066274A1 true WO2018066274A1 (fr) 2018-04-12

Family

ID=61831477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/031213 WO2018066274A1 (fr) 2016-10-06 2017-08-30 Endoscope

Country Status (2)

Country Link
JP (1) JP2020014487A (fr)
WO (1) WO2018066274A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0420323A (ja) * 1990-05-14 1992-01-23 Asahi Optical Co Ltd 内視鏡の可撓管及びその製造方法
JPH09253035A (ja) * 1996-03-25 1997-09-30 Fuji Photo Optical Co Ltd 内視鏡の処置具挿通チャンネル
JPH09253033A (ja) * 1996-03-25 1997-09-30 Fuji Photo Optical Co Ltd 内視鏡の処置具挿通チャンネル
JP2009153713A (ja) * 2007-12-26 2009-07-16 Olympus Medical Systems Corp 内視鏡
WO2015145790A1 (fr) * 2014-03-25 2015-10-01 オリンパス株式会社 Endoscope

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0420323A (ja) * 1990-05-14 1992-01-23 Asahi Optical Co Ltd 内視鏡の可撓管及びその製造方法
JPH09253035A (ja) * 1996-03-25 1997-09-30 Fuji Photo Optical Co Ltd 内視鏡の処置具挿通チャンネル
JPH09253033A (ja) * 1996-03-25 1997-09-30 Fuji Photo Optical Co Ltd 内視鏡の処置具挿通チャンネル
JP2009153713A (ja) * 2007-12-26 2009-07-16 Olympus Medical Systems Corp 内視鏡
WO2015145790A1 (fr) * 2014-03-25 2015-10-01 オリンパス株式会社 Endoscope

Also Published As

Publication number Publication date
JP2020014487A (ja) 2020-01-30

Similar Documents

Publication Publication Date Title
EP2478822B1 (fr) Endoscope
EP2564756A1 (fr) Endoscope
JP4680966B2 (ja) 内視鏡および内視鏡の挿入部
US20160249787A1 (en) Inserting instrument, rotary unit and inserting apparatus
JP5390048B1 (ja) 内視鏡システム
JP2010000269A (ja) 内視鏡
US11246475B2 (en) Endoscope
JP5964880B2 (ja) 内視鏡
US20170172385A1 (en) Endoscope
WO2016190011A1 (fr) Partie incurvée d'endoscope
JP2015119839A (ja) 内視鏡
CN112004452A (zh) 螺旋管和内窥镜
WO2015159619A1 (fr) Tube d'endoscope flexible, endoscope et procede de fabrication de tube d'endoscope flexible
JP3923701B2 (ja) 内視鏡
JP7309740B2 (ja) 内視鏡用チューブ及び内視鏡
WO2018066274A1 (fr) Endoscope
JP5810037B2 (ja) 内視鏡システム
US20210106213A1 (en) Endoscope
JP6223635B2 (ja) 内視鏡
JP6850694B2 (ja) 内視鏡及び内視鏡の製造方法
US20170231468A1 (en) Endoscope flexible tube and method of manufacturing endoscope flexible tube
EP3260034A1 (fr) Système d'endoscope
JP6402285B1 (ja) 内視鏡
US20210059505A1 (en) Endoscope bonding structure and endoscope
WO2021117202A1 (fr) Dispositif d'insertion

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17858113

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17858113

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP