WO2021193691A1

WO2021193691A1 - Endoscope

Info

Publication number: WO2021193691A1
Application number: PCT/JP2021/012148
Authority: WO
Inventors: 原田　高志
Original assignee: 富士フイルム株式会社
Priority date: 2020-03-27
Filing date: 2021-03-24
Publication date: 2021-09-30

Abstract

Provided is an endoscope in which a wire affixing member has an integrated configuration and can affix a wire with a simple operation. This endoscope comprises: an operation part that is provided with an operation member; a raising platform that is provided to the tip end part of an insertion part; a wire that operates the raising platform; a wire affixing member that affixes the wire; and a linking member equipped with a connection member that makes it possible to connect to the wire affixing member, and a rod that is connected to the operation member. The wire affixing member affixes the base-end side of the wire, and comprises, in an integrated configuration: a wire channel into which the wire is inserted; a wire gripping member that has a through hole with a length along the length axis direction in which the wire is inserted, and a slit in the outer peripheral surface extending along the through hole; a sliding member that accommodates the wire gripping member; and a holding member that holds the sliding member. The wire is affixed by clamping the wire gripping member, constricting the gap of the slit, and reducing the diameter of the through hole.

Description

Endoscope

The present invention relates to an endoscope, and particularly relates to an endoscope provided with a stand on the tip side of an insertion portion to change the direction in which the treatment tool is taken out.

In the endoscope, various treatment tools are introduced from the treatment tool introduction port provided in the operation part, and this treatment tool is taken out from the treatment tool outlet opened at the tip of the insertion part and used for treatment. ing. For example, in a duodenal endoscope, a treatment tool such as a guide wire or a contrast tube is used. Treatment tools such as puncture needles are used in ultrasonic endoscopes. In other direct speculums and perspective mirrors, treatment tools such as forceps or snares are used. Such a treatment tool needs to change the lead-out direction at the tip in order to treat a desired position in the subject. Therefore, the tip body of the tip is provided with a stand for changing the direction in which the treatment tool is taken out. The endoscope is provided with a treatment tool standing mechanism that displaces the posture of the standing table between the standing position and the lying position.

The endoscope of Patent Document 1 has a stand on the tip side of the work channel. The pedestal is rotated around the pivot axis by a wire so that the medical device can be accurately directed to the surgical area. The base end side of the wire is inserted through the collet, and then the nut is rotated to tighten the collet and the collet secures the wire.

U.S. Patent Application Publication No. 2007/099500

However, in Cited Document 1, the collet and the nut are composed of separate parts, and the wire is fixed by a plurality of members. Therefore, it is necessary to insert the wire into the collet and push the collet into the nut to rotate it. Therefore, there is a concern that the operation for fixing the wire becomes complicated.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an endoscope in which a wire fixing member is integrally formed and an upright operation wire can be fixed by a simple operation.

The endoscope of the first form has an operation portion provided with an operation member, an insertion portion provided on the tip side of the operation portion and inserted into a subject, and a treatment tool provided on the tip portion of the insertion portion. The standing table, the standing operation wire whose tip side is connected to the treatment tool standing table and pushed and pulled according to the operation of the operating member to operate the treatment tool standing table, the wire channel through which the standing operation wire is inserted, and the standing position. A wire fixing member that fixes the base end side of the operation wire, in which a through hole having a length in the longitudinal axis direction through which the standing operation wire is inserted is formed, and a wire having a slit along the through hole on the outer peripheral surface. A wire fixing member integrally including a gripping member, a sliding member for accommodating the wire gripping member, and a holding member for holding the sliding member, and a wire fixing member arranged on the base end side of the operation portion. It is provided with a sliding control pipe that slidably accommodates the sliding member, a connecting member that accommodates the wire fixing member and enables connection with the wire fixing member, and a rod connected to the operating member, and is operated. An endoscope provided with a link member arranged outside the portion and capable of moving the wire fixing member in the longitudinal axis direction of the standing operation wire in conjunction with the operation member, the wire fixing member. By rotating the holding member to move the sliding member and the wire gripping member relatively, the wire gripping member is tightened to reduce the gap between the slits and the through hole to reduce the diameter of the standing operation wire. Fix it. According to the first embodiment, the standing operation wire can be fixed by a simple operation.

In the second form of endoscope, the holding member has a snap that elastically deforms, the connecting member has a protrusion, and the holding member and the connecting member snap-fit and engage with each other by the snap and the protrusion. According to the second form, the wire fixing member and the connecting member can be fixed.

In the third form of endoscope, the sliding member has a snap regulating member that regulates elastic deformation of the snap. According to the third embodiment, the wire fixing member is prevented from being unintentionally separated from the connecting member.

In the endoscope of the fourth form, the holding member of the wire fixing member has a fixed side index, the connecting member of the link member has a link side index, and at the stop position of the rotational operation of the holding member, the fixed side index and the fixed side index. The link-side index is provided at a position where the stop position can be recognized. According to the fourth aspect, the wire fixing member can fix the standing operation wire with a sufficient gripping force.

In the endoscope of the fifth form, the sliding member of the wire fixing member has a sliding side protrusion on the outer peripheral surface, and the snap of the holding member gets over the sliding side protrusion at the stop position of the rotational operation of the holding member. According to the fifth embodiment, the wire fixing member can fix the standing operation wire with a sufficient gripping force.

In the endoscope of the sixth form, the holding member of the wire fixing member has a fixing side protrusion, the connecting member of the link member has a link side protrusion, and the fixed side protrusion is at a stop position of the rotational operation of the holding member. Overcome the link side protrusion. According to the sixth embodiment, the wire fixing member can fix the standing operation wire with a sufficient gripping force.

In the endoscope of the seventh form, the sliding member of the wire fixing member has an engaging portion on the outer peripheral surface, a through hole is formed in the connecting member, and the through hole moves the sliding member in the wire axial direction. It is possible and has an engaged portion that engages with the engaging portion, and regulates the rotation of the sliding member. According to the seventh aspect, the wire gripping member can be tightened by the sliding member.

According to the endoscope of the present invention, the wire fixing member is integrally configured, and the standing operation wire can be fixed by a simple operation.

FIG. 1 is a block diagram of an endoscope system including an endoscope. FIG. 2 is an enlarged perspective view of the tip portion. FIG. 3 is a perspective view of the tip main body shown in FIG. FIG. 4 is a perspective view of the cap shown in FIG. FIG. 5 is a partially enlarged view of the hand operation unit. FIG. 6 is a partially enlarged view of the hand operation unit. FIG. 7 is a partially enlarged view of the hand operation unit. FIG. 8 is an assembly drawing of the wire fixing member. FIG. 9 is a diagram showing a procedure for fixing the standing operation wire and the link member by the wire fixing member. FIG. 10 is a diagram showing a procedure for fixing the standing operation wire and the link member by the wire fixing member. FIG. 11 is a diagram showing a procedure for fixing the standing operation wire and the link member by the wire fixing member. FIG. 12 is a diagram showing a procedure for fixing the standing operation wire and the link member by the wire fixing member. FIG. 13 is a diagram showing a procedure for fixing the standing operation wire and the link member by the wire fixing member. FIG. 14 shows a first aspect in which the user can recognize the stop position of the rotation operation. FIG. 15 shows a second aspect in which the user can recognize the stop position of the rotation operation. FIG. 16 shows a third aspect in which the user can recognize the stop position of the rotation operation.

Hereinafter, preferred embodiments of the endoscope of the present invention will be described with reference to the accompanying drawings. As used herein, "containment" includes the case of completely accommodating and the case of accommodating only a part.

FIG. 1 is a configuration diagram of an endoscope system 12 including an endoscope 10 according to an embodiment of the present invention. The endoscope system 12 includes an endoscope 10, an endoscope processor device 14, and a display 18.

The endoscope 10 includes a hand operation unit 22 provided with a standing operation lever 20 and an insertion unit 24 having a base end portion connected to the hand operation unit 22 and inserted into a subject. The standing operation lever 20 is an example of the operation member of the present invention.

The insertion portion 24 has a long axis direction Ax from the proximal end portion to the distal end portion, and includes a soft portion 26, a curved portion 28, and a tip end portion 30 in this order from the proximal end side to the distal end side. The detailed configuration of the tip portion 30 will be described later, but first, a schematic configuration of the tip portion 30 will be described.

FIG. 2 is an enlarged perspective view of the tip portion 30. Here, the endoscope 10 of the embodiment (see FIG. 1) is a lateral endoscope used as, for example, a duodenal endoscope, and the tip portion 30 of FIG. 2 has a configuration of a lateral endoscope. ..

FIG. 3 is a perspective view of the tip portion main body 32 constituting the tip portion 30. FIG. 4 is a perspective view of the cap 34 constituting the tip portion 30. As shown in FIGS. 2 to 4, the tip portion 30 is configured by attaching a cap 34 to the tip portion main body 32. As will be described later, the cap 34 is provided with a treatment tool standing table 36 (hereinafter, standing table 36) having a treatment tool guiding surface 36A, and in FIGS. 2 and 4, the standing table 36 is located at an inverted position. The state of being shown is shown.

In addition to the tip portion 30, various contents arranged inside the insertion portion 24 of the endoscope 10 (see FIG. 1) are shown in FIGS. 2 and 3. That is, a standing operation for changing the lead-out direction of the treatment tool channel 37 that guides the tip of the treatment tool (not shown) to the tip body 32 and the tip of the treatment tool that is led out from the tip body 32. A wire 38 (hereinafter referred to as a wire 38), a wire channel 40 through which the wire 38 is inserted, an air supply / water supply tube 42, and a cable insertion channel 44 are shown. Further, a light guide (not shown) that guides the illumination light supplied from the light source device 15 (see FIG. 1) to the tip body 32, and an angle wire (not shown) for bending the curved portion 28 (see FIG. 1). ) And the like are also arranged inside the insertion portion 24. The wire channel 40 is an example of the wire insertion channel of the present invention, and the wire 38 is inserted and arranged inside the wire channel 40 so as to be able to advance and retreat. The wire channel 40 is arranged from the hand operation unit 22 (see FIG. 1) to the insertion unit 24.

In this specification, a three-dimensional Cartesian coordinate system in the three-axis directions (X-axis direction, Y-axis direction, Z-axis direction) will be described. That is, when the tip portion 30 is viewed from the hand operating portion 22 and the direction in which the treatment tool (not shown) is drawn out by the standing table 36 is the upward direction, the upward direction is the Z (+) direction and the opposite direction. The downward direction is the Z (−) direction. Further, the right direction at that time is the X (+) direction, and the left direction is the X (−) direction. Further, the front direction (the direction toward the tip end side in the long axis direction Ax direction of the insertion portion 24) at that time is the Y (+) direction, and the rear direction (the base end side in the long axis direction Ax direction of the insertion portion 24). Direction) is the Y (-) direction. The Y-axis direction including the Y (+) direction and the Y (−) direction is parallel to the direction of the major axis direction Ax of the insertion portion 24. The Z-axis direction is a direction orthogonal to the long-axis direction Ax. The X-axis direction is a direction orthogonal to the Y-axis direction and the Z-axis direction, respectively.

Returning to FIG. 1, the hand operation unit 22 is configured to have a substantially cylindrical shape as a whole. The hand operation unit 22 has an operation unit main body 46 provided with the standing operation lever 20 and a grip portion 48 connected to the operation unit main body 46. The grip portion 48 is a portion that is gripped by the operator when the endoscope 10 is operated, and the base end portion of the insertion portion 24 is connected to the tip end side of the grip portion 48 via a breakthrough tube 50. A link member 120 is arranged outside the operation unit main body 46. The link member 120 moves in conjunction with the operation of the standing operation lever 20. The wire fixing member 80 is accommodated and fixed on the side of the base end of the link member 120. The wire fixing member 80 fixes the wire 38 (not shown). The wire fixing member 80 fixes the wire 38 and the link member 120.

The base end portion of the universal cable 52 is connected to the operation unit main body 46, and the connector device 54 is provided at the tip end portion of the universal cable 52. The connector device 54 is connected to the endoscope processor device 14. The endoscope processor device 14 includes a light source device 15 and an image processing device 16. The light source device 15 is provided with a processor-side connector 15A to which the connector device 54 is connected. Further, a display 18 for displaying an image processed by the image processing device 16 is connected to the image processing device 16. The endoscope system 12 transmits power, optical signals, and the like between the endoscope 10 and the endoscope processor device 14 via a connector portion composed of a connector device 54 and a processor-side connector 15A. It has a configuration for non-contact transmission. As a result, the light from the light source device 15 is transmitted via an optical fiber cable (not shown) and is emitted from an illumination window 74 (see FIG. 2) provided on the tip surface of the tip portion 30. Further, the optical signal of the image captured from the observation window 76 (see FIG. 2) is image-processed by the image processing device 16 and displayed as an image on the display 18.

Further, the air supply / water supply button 57 and the suction button 59 are arranged side by side on the operation unit main body 46. The air supply / water supply button 57 is a button that can be operated in two stages, and air can be supplied to the air supply / water supply nozzle 58 (see FIG. 2) via the air supply / water supply tube 42 by the first stage operation. Water can be supplied to the air supply / water supply nozzle 58 via the air supply / water supply tube 42 by the operation of the step. Further, when the suction button 59 is operated, body fluid such as blood can be sucked from the treatment tool outlet 60 (see FIGS. 2 and 3) via the treatment tool channel 37.

As shown in FIG. 1, a pair of angle knobs 62, 62 for bending the curved portion 28 are arranged on the operation unit main body 46. The pair of angle knobs 62, 62 are provided coaxially and rotatably. For example, four angle wires (not shown) are connected to the angle knobs 62 and 62 and the curved portion 28, and these angle wires are pushed and pulled by the rotation operation of the angle knobs 62 and 62. The curved portion 28 is curved vertically and horizontally.

Further, the standing operation lever 20 is rotatably provided coaxially with the angle knobs 62 and 62. The standing operation lever 20 is rotationally operated by the operator who grips the grip portion 48. When the standing operation lever 20 is rotated, the link member 120 moves, and the wire fixing member 80 fixed to the link member 120 moves. Since the wire fixing member 80 fixes the wire 38 shown in FIG. 2, this operation pushes and pulls the wire 38. By pushing and pulling the wire 38, the posture of the standing table 36 connected to the tip of the wire 38 is changed between the lodging position shown in FIG. 2 and the standing position (not shown).

As shown in FIG. 1, the grip portion 48 of the hand operation portion 22 includes a treatment tool introduction port 64 for introducing the treatment tool. The treatment tool (not shown) introduced from the treatment tool introduction port 64 with the tip at the top is inserted into the treatment tool channel 37 (see FIGS. 2 and 3) and is led out from the treatment tool outlet 60 to the outside. NS. Examples of the treatment tool include a biopsy forceps having a cup capable of collecting biological tissue at the tip, a knife for EST (Endoscopic Sphincterotomy), and a contrast tube.

Next, the structure of the tip portion 30 shown in FIG. 2 will be described. First, the tip body 32 will be described.

The tip main body 32 is made of, for example, a metal material having corrosion resistance, and has a partition wall 68 projecting in the Y (+) direction as shown in FIG. By attaching the cap 34 of FIG. 4 to the tip main body 32, the upright stand accommodating space 66 of FIG. 2 is defined by the partition wall 68 of the tip main body 32 and the wall portion 34B of the cap 34. The standing table accommodating space 66 is arranged at a position on the X (+) direction side of the partition wall 68 and at a position on the Y (+) direction side of the treatment tool outlet 60. As shown in FIG. 3, a through hole 61 is formed in the tip body 32, and the wire 38 is inserted through the through hole 61.

An illumination window 74 and an observation window 76 are arranged adjacent to each other in the Y direction on the upper surface 68A on the Z (+) side of the partition wall 68. The illumination window 74 can irradiate the visual field region in the Z (+) direction with illumination light, and the observation window 76 can observe the visual field region in the Z (+) direction. The tip main body 32 is provided with an air supply / water supply nozzle 58 toward the observation window 76, and the observation window 76 is cleaned by air and water ejected from the air supply / water supply nozzle 58.

Next, the cap 34 shown in FIG. 4 will be described.

The cap 34 is made of an elastic material, for example, a rubber material such as fluororubber or silicon rubber, and a resin material such as polysulfone or polycarbonate.

The cap 34 includes a wall portion 34B whose tip side is sealed and formed in a substantially cylindrical shape, and a substantially rectangular opening window 34A is formed in a part of the wall portion 34B. The opening window 34A is opened in the Z (+) direction.

When the cap 34 is attached to the tip body 32, as shown in FIG. 2, the standing table accommodating space 66 is defined in the tip body 32, and the opening window 34A is opened in the Z (+) direction. NS. As a result, the treatment tool outlet 60 of the tip main body 32 is communicated with the opening window 34A via the upright stand accommodating space 66.

As shown in FIG. 4, the cap 34 is provided with a bearing 34C that rotatably supports the upright stand 36 inside the cap 34. The bearing 34C is configured as a plate-like body having a height in the Z (+) direction and extending in the Y (+) direction.

The upright stand 36 has a rotating shaft 36B along the X direction, and the rotating shaft 36B is rotatably supported by a through hole (not shown) of the bearing 34C. As a result, the standing table 36 is rotated around the rotation shaft 36B, and its posture is changed between the lying position and the standing position.

The tip of the wire 38 is connected to the stand 36. The wire 38 is connected to the tip side of the upright stand 36 on the side opposite to the side on which the rotation shaft 36B is formed and at a position adjacent to the treatment tool guide surface 36A.

The cap 34 of the embodiment is of a type to which the standing table 36 is attached in advance, and the wire 38 is also connected to the standing table 36 in advance. When the treatment of the endoscope 10 is completed, the cap 34 configured in this way is removed from the tip body 32 and discarded together with the standing table 36 and the wire 38 as, for example, disposable. The standing table 36 may be attached to the tip main body 32 instead of the cap 34.

Based on FIGS. 5 to 7, the operation of the standing operation lever 20 for moving the standing table 36 between the lying position and the standing position will be described. 5 and 6 show a partially enlarged view of the hand operation unit 22 of the operation unit main body 46 when the angle knobs 62 and 62 are removed from the operation unit main body 46 shown in FIG. FIG. 7 further shows a partially enlarged view of the hand operation unit 22 when the link member 120 is removed. 5 and 7 show the position of the standing operation lever 20 when the standing table 36 (see FIG. 2) is positioned in the inverted position, and FIG. 6 shows the standing operation when the standing table 36 is positioned in the standing position. The position of the lever 20 is shown.

As shown in FIGS. 5 and 6, the hand operation unit 22 includes a rotating shaft 102 and a rotating ring 104 that is rotatably held by the rotating shaft 102 within a certain angle range. The rotation shaft 102 is arranged parallel to the X-axis direction. The standing operation lever 20 has one end of the ring shape, and one end of the ring shape is connected to the surface of the rotary ring 104 facing the X (+) side by a screw or the like. The standing operation lever 20 and the rotary ring 104 are connected, and the rotary ring 104 is rotated about the rotary shaft 102 by the operation of the standing operation lever 20 by the operator.

As shown in FIGS. 5 and 6, the link member 120 includes a rod 122 and a connecting member 124. The rod 122 is composed of a member having a longitudinal axis in the Y-axis direction. The rod 122 is connected to one end of the ring shape of the standing operation lever 20 via the connecting member 106 on the tip side. The rod 122 is connected to the rotary ring 104 via the connecting member 106 and the standing operation lever 20, and the link member 120 and the rotary ring 104 are connected to each other.

The connecting member 124 is connected to the rod 122 with a screw or the like. The rod 122 and the connecting member 124 integrally form the link member 120. The connecting member 124 accommodates the wire fixing member 80.

The wire fixing member 80 fixes a wire 38 (not shown) guided from the operation unit main body 46 to the base end side. When fixing the wire 38, the wire fixing member 80 is fixed to the link member 120 via the connecting member 124. Therefore, the wire 38 and the link member 120 are fixed by the wire fixing member 80.

As shown in FIG. 7, the wire fixing member 80 has holding

members

84 and 88 and a sliding member 82 held by the holding

members

84 and 88. The structure of the wire fixing member 80 will be described later.

The sliding control pipe 108 is arranged substantially parallel to the Y-axis direction on the side of the base end of the hand operation unit 22. The sliding control pipe 108 is fixedly arranged inside the operation unit main body 46 of the hand operation unit 22. The sliding control pipe 108 is made of a tubular member and has a through hole penetrating between the base end side and the tip end side. The sliding control pipe 108 slidably accommodates the sliding member 82 of the wire fixing member 80. The sliding member 82 can move along the sliding regulation pipe 108. The sliding regulation pipe 108 regulates the sliding direction of the sliding member 82 of the wire fixing member 80.

The operation of moving the standing table between the standing position and the lying position will be described with reference to FIGS. 5 to 7.

As shown in FIG. 5, the standing operation lever 20 is located on the base end side (Y (−) side) by the operator's operation. The link member 120 connected to the standing operation lever 20 and the rotary ring 104 is located on the tip side (Y (+) side). The wire fixing member 80 housed in the connecting member 124 of the link member 120 is located on the tip side (Y (+) side). At this position, the wire 38 fixed to the wire fixing member 80 is pushed to the tip side (Y (+) side), and the upright stand 36 (not shown) connected to the wire 38 is laid down. Located in position.

As shown in FIG. 6, the standing operation lever 20 is located on the tip side (Y (+) side) by the operation of the operator. The link member 120 connected to the standing operation lever 20 and the rotary ring 104 is located on the base end side (Y (−) side). The wire fixing member 80 housed in the connecting member 124 of the link member 120 is located on the base end side (Y (−) side). At this position, the wire 38 fixed to the wire fixing member 80 is pulled toward the tip side (Y (-) side), and the standing table 36 (not shown) connected to the wire 38 stands up. Located in position. When the operator operates the standing operation lever 20, the link member 120 is configured to be able to move the wire fixing member 80 in the longitudinal axis direction of the wire 38 in conjunction with the standing operation lever 20. The wire 38 fixed to the wire fixing member 80 moves the standing table 36 to an arbitrary position between the lying position and the standing position. As shown in FIG. 7, in which the upright stand 36 moves, the sliding member 82 is housed in the sliding restricting pipe 108, so that the sliding direction of the wire fixing member 80 is restricted. As shown in FIGS. 5 to 7, the rotary motion of the standing operation lever 20 is converted into a linear motion by the link member 120.

Next, the structure of the wire fixing member 80 will be described based on the assembly drawing of FIG. In FIG. 8, the terms “tip side” and “base end side” mean the positional relationship when the wire fixing member 80 is attached to the hand operating portion 22 of the endoscope 10.

As shown in 8-1, the wire fixing member 80 includes a wire gripping member 86, a sliding member 82 accommodating the wire gripping member 86, and holding

members

84 and 88 accommodating the sliding member 82. A movement restricting member 90 for restricting the movement of the wire gripping member 86 is provided on the side of the base end of the holding member 88. Although the holding member 88 and the movement restricting member 90 are shown as separate members in FIG. 8, they may be integrally formed of one member.

The sliding member 82 is made of a tubular member and has a through hole penetrating between the base end side and the tip end side. A groove 82A is formed on the outer peripheral surface of the sliding member 82 on the tip end side, and a packing 92 is arranged in the groove 82A. The packing 92 is, for example, an O-ring.

In the sliding member 82, two engaging portions 82B are formed on the outer peripheral surface on the side of the base end side of the groove 82A. The engaging portion 82B projects outward from the outer peripheral surface in the radial direction of the sliding member 82. The sliding member 82 includes a snap restricting member 82C that projects from the engaging portion 82B toward the proximal end along the outer peripheral surface. The sliding member 82 includes a screw portion 82D on the base end side of the snap regulating member 82C. The screw portion 82D is formed in the shape of a male screw in which a screw thread protrudes from the outer peripheral surface.

The holding member 84 is composed of a two-stage tubular member, and has a through hole penetrating between the base end side and the tip end side. The outer shape of the holding member 84 on the tip side is smaller than the outer shape on the base end side. The holding member 84 includes two snaps 84A. The snap 84A has a fixed end that is cantilevered on the proximal side and a free end that extends to the distal end. The snap 84A is configured to be elastically deformable with the fixed end as a fulcrum. The holding member 84 includes a claw portion 84B extending from the base end side of the tubular member toward the base end side.

The wire gripping member 86 has a tubular shape having a tapered surface, penetrates between the tip end side and the base end side, and has a length in the longitudinal axis direction through which the wire 38 (not shown) is inserted. Has holes. The wire gripping member 86 can insert the wire 38. A plurality of slits 86B extending from the base end side to the tip end side along the through hole are formed on the outer peripheral surface of the wire gripping member 86. By tightening the wire gripping member 86, reducing the gaps between the plurality of slits 86B, and reducing the diameter of the through holes, the wire gripping member 86 can fix the wire 38. The wire gripping member 86 has a tapered surface 86A on the outer peripheral surface that expands in diameter toward the proximal end side. The wire gripping member 86 is housed in the sliding member 82 from the side of the base end of the sliding member 82. The gap of the slit 86B is reduced as the sliding member 82 approaches the wire gripping member 86, and the through hole is reduced in diameter. The gap of the slit 86B expands to the original state when the sliding member 82 moves away from the wire gripping member 86, and the through hole expands in diameter. The wire fixing member 80 can detachably fix the wire 38 by the operation of reducing the diameter and expanding the diameter of the through hole of the wire gripping member 86. A collet can be applied as an example of the wire gripping member 86.

The holding member 88 is composed of a two-stage tubular member, and has a through hole penetrating between the base end side and the tip end side. The outer shape of the member 88A on the tip side of the holding member 88 is smaller than the outer shape of the member 88B on the base end side. The member 88B has a substantially cylindrical shape and extends inside the member 88A. The inner peripheral surface of the member 88B includes a screw portion (not shown). The screw portion (not shown) is formed in the shape of a female screw having a thread on the inner peripheral surface of the member 88B. The member 88A of the holding member 88 is housed in the holding member 84.

The holding member 88 has an engaging surface 88C. The engaging surface 88C is formed on the member 88B and engages with the claw portion 84B of the holding member 84. The engaging surface 88C is composed of an opening edge of a through hole formed in the member 88B. The through hole of the member 88B extends from the tip end side to the base end side.

The movement restricting member 90 is arranged in the opening on the base end side of the holding member 88. The movement restricting member 90 is formed of a thin plate having a thin thickness. However, the shape is not limited.

As shown in 8-2, the wire fixing member 80 is configured by integrally assembling the sliding member 82, the holding member 84, the wire gripping member 86, the holding member 88, and the movement restricting member 90. The screw portion 82D of the sliding member 82 and the screw portion 88D of the holding member 88 (see FIG. 10) are movably meshed with each other.

In the present specification, the cylindrical shape is not limited to a cylindrical shape as long as it has a through hole, and can be configured in either a single stage or a multi-stage shape.

Next, a procedure for fixing the wire 38 and the link member 120 with the wire fixing member 80 will be described with reference to FIGS. 9 to 13.

First, a cap 34 with a stand 36 to which the wire 38 is connected is prepared (see FIG. 4). The wire 38 connected to the upright stand 36 is inserted from the through hole 61 (see FIG. 3) of the tip main body 32 toward the base end side. The wire 38 is guided to the side of the base end of the hand operation unit 22 through the wire channel 40. A cap 34 with a stand 36 is attached to the tip body 32.

As shown in FIG. 9, the wire 38 passes through the openings of the operation unit main body 46 and the connecting member 124 of the link member 120, and protrudes toward the proximal end side. The wire fixing member 80 is prepared and the sliding member 82 is positioned toward the opening of the connecting member 124. The wire fixing member 80 and the connecting member 124 are moved in a direction in which they are relatively close to each other. The wire 38 is housed in the through hole of the sliding member 82. In FIG. 9, the base end side of the wire 38 is housed in the through hole of the sliding member 82.

FIG. 10 shows a state in which the wire fixing member 80 and the connecting member 124 are closer to each other as compared with FIG. As shown in 10-2, the wire fixing member 80 is substantially housed in the connecting member 124, leaving the holding member 88.

As shown in 10-1, the sliding member 82 of the wire fixing member 80 passes through the through hole 124B of the connecting member 124 and is guided to the sliding regulation pipe 108 of the operation unit main body 46. A part of the sliding member 82 is housed in the connecting member 124.

The protrusion 124A is continuously provided along the inner peripheral surface of the connecting member 124. The protrusion 124A projects inward in the radial direction of the through hole 124B of the connecting member 124. The holding member 84 is housed in the connecting member 124, and the snap 84A of the holding member 84 and the protrusion 124A come into contact with each other. The snap 84A is elastically deformed inward by the protrusion 124A with the fixed end as a fulcrum. A notch 84C for accommodating the protrusion 124A is formed on the side of the snap 84A near the fixed end.

The inner peripheral surface of the through hole 124B of the connecting member 124 has a shape that follows the snap 84A on the tip side of the protrusion 124A, and has a shape that tapers toward the tip side.

A tapered surface 82E is formed on the inner peripheral surface of the sliding member 82 on the base end side. The tapered surface 82E is arranged so as to face the wire gripping member 86 at a position separated from the tapered surface 86A.

A screw portion 88D that meshes with the screw portion 82D is provided on the inner peripheral surface of the through hole of the holding member 88.

FIG. 11 shows a state in which the wire fixing member 80 and the connecting member 124 are closer to each other as compared with FIG. As shown in 11-2, the wire fixing member 80 is housed deeper in the connecting member 124, leaving the holding member 88.

As shown in 11-1, the wire fixing member 80 is further moved to the tip side, and the protrusion 124A is located at the notch 84C on the fixed end side of the snap 84A. In this state, the elastic deformation of the snap 84A is released, and the snap 84A returns to the shape of the natural body. The snap 84A is housed following the inner peripheral surface of the through hole 124B.

The holding member 84 and the connecting member 124 are snap-fit-engaged by the snap 84A and the protrusion 124A. The wire fixing member 80 and the connecting member 124 are snapped into place, and the wire fixing member 80 and the connecting member 124 are fixed by snap-fit engagement.

FIG. 12 shows a state in which the wire fixing member 80 is rotated with respect to the connecting member 124. As shown in 12-1, the wire fixing member 80 is rotated about 1/4 clockwise with respect to the connecting member 124 as shown by an arrow when viewed from the base end side.

As shown in 12-2, the connecting member 124 regulates the wire fixing member 80 from moving toward the tip side.

When the wire fixing member 80 is rotated, the holding member 84, the wire gripping member 86, the holding member 88, and the movement restricting member 90, excluding the sliding member 82, rotate. Since the screw portion 82D of the sliding member 82 and the screw portion 88D of the holding member 88 are movably meshed with each other, the sliding member 82 is moved to the base end side along the screw portion 88D of the holding member 88. Moving. On the other hand, the wire gripping member 86 is restricted from moving toward the proximal end by the movement restricting member 90. The sliding member 82 and the wire gripping member 86 can be moved so as to be relatively close to each other, and the tapered surface 86A of the wire gripping member 86 and the tapered surface 82E of the sliding member 82 come into contact with each other. The sliding member 82 tightens the wire gripping member 86. By this tightening, the gap of the slit 86B of the wire gripping member 86 is reduced, the through hole is reduced in diameter, and the wire gripping member 86 grips and fixes the wire 38.

By moving the sliding member 82 toward the base end, the snap restricting member 82C of the sliding member 82 is located at the free end of the snap 84A. Since the snap restricting member 82C fills the gap between the sliding member 82 and the snap 84A, the elastic deformation of the snap 84A is restricted. The regulation of elastic deformation of the snap 84A prevents the wire fixing member 80 from coming off the connecting member 124.

Next, FIG. 13 is a perspective view of the link member 120 and the wire fixing member 80 as viewed from the tip side. In 13-1, the wire fixing member 80 is omitted. As shown in 13-1, a through hole 124B is formed in the connecting member 124 of the link member 120. An engaged portion 124C is formed in the through hole 124B. The engaged portion 124C is a so-called key groove formed along the through hole 124B.

13-2 shows the state after rotating the wire fixing member 80 shown in FIG. As shown in 13-2, the sliding member 82 of the wire fixing member 80 is inserted into the through hole 124B of the connecting member 124. Therefore, the sliding member 82 can move in the wire axial direction.

The engaging portion 82B of the sliding member 82 engages with the engaged portion 124C of the connecting member 124. The engaging portion 82B and the engaged portion 124C are in a key-keyway relationship. Since it engages with the engaged portion 124C of the connecting member 124, the rotation of the sliding member 82 is restricted. The engaging portion 82B can be used as a key groove, and the engaged portion 124C can be used as a key.

Since the rotation of the sliding member 82 is restricted, when the holding

members

84 and 88 of the wire fixing member 80 are rotated, the sliding member 82 is based on the engagement between the screw portion 82D and the screw portion 88D. Can be moved to the edge side. As shown in FIGS. 9 to 13, the wire fixing member 80 of the embodiment is integrally configured, and the wire 38 and the link member 120 can be fixed by a simple operation.

In the embodiment, the wire gripping member 86 is tightened by rotating the holding

members

84 and 88 of the wire fixing member 80. By this tightening, the wire gripping member 86 grips and fixes the wire 38. Therefore, in order to securely tighten the wire gripping member 86, it is necessary to rotate the holding

members

84 and 88 to the stop position of the rotation operation. Therefore, it is preferable that the user can recognize that the holding

members

84 and 88 have been rotated to the stop position.

A mode in which the user can recognize the stop position of the rotation operation will be described with reference to FIGS. 14 to 16.

FIG. 14 is a view showing the first aspect, and is a view of the state in which the holding

members

84 and 88 of the wire fixing member 80 are in the stop position of the rotational operation from the side of the base end. FIG. 14 corresponds to the state of FIG.

The wire fixing member 80 is housed in the connecting member 124 of the link member 120. The holding member 88 of the wire fixing member 80 has a fixing side index 88E. The fixed side index 88E is composed of, for example, ribs protruding outward from the outer shape of the holding member 88.

The connecting member 124 of the link member 120 has a link side index 124D on the accommodating surface on the accommodating side of the wire fixing member 80. The link-side index 124D is, for example, a print formed on the accommodating surface.

The fixed side index 88E and the link side index 124D are provided at positions where the stop position can be recognized. After rotating the holding

members

84 and 88, the user can recognize the stop position from the positional relationship between the fixed side index 88E and the link side index 124D.

As shown in FIG. 14, when the fixed side index 88E is viewed clockwise and passes through the link side index 124D, it can be determined that the holding

members

84 and 88 are in the stop position of the rotational operation. On the other hand, when the fixed-side index 88E does not pass through the link-side index 124D when viewed clockwise, it can be determined that the holding

members

84 and 88 have not reached the stop position of the rotational operation.

The structure of the fixed side index 88E and the link side index 124D is not limited as long as the stop position can be recognized, and unevenness, printing, ribs, etc. are applied.

With the screw portion 82D (not shown) of the sliding member 82 so as to obtain the set chuck tightening force at the stop position (1/2 rotation or 1/4 rotation) of the rotation operation of the holding

members

84 and 88. , The pitch and the like of the screw portion 88D of the holding member 88 are set.

FIG. 15 is a view showing the second aspect, and is a perspective view of the wire fixing member 80 as viewed from the tip side. 15-1 is a diagram corresponding to the state of FIG. In the state of 15-1, the holding

members

84 and 88 are not rotated. As shown in 15-1, the sliding member 82 includes one sliding side protrusion 82F between the engaging portion 82B and the snap regulating member 82C. The sliding side projection 82F projects outward from the outer peripheral surface of the sliding member 82 in the radial direction of the sliding member 82.

15-2 is a diagram corresponding to the state of FIG. In the state of 15-2, the holding

members

84 and 88 are rotated. When the holding

members

84 and 88 rotate, the sliding member 82 moves toward the base end. The snap 84A approaches the sliding side protrusion 82F, and the snap 84A gets over the sliding side protrusion 82F. When the snap 84A gets over the sliding side protrusion 82F, a click feeling is generated, so that the user can recognize the stop position of the rotation operation.

The holding

members

84 and 88 are held together with the screw portion 82D (not shown) of the sliding member 82 so that the set chuck tightening force is obtained at the stop position of the rotational operation and the snap 84A gets over the sliding side protrusion 82F. The pitch and the like of the screw portion 88D of the member 88 are set.

FIG. 16 is a view showing a third aspect, and is a perspective view of the wire fixing member 80 as viewed from the tip side. 16-1 is a diagram corresponding to the state of FIG. In the state of 16-1, the holding

members

84 and 88 are not rotated. As shown in 16-1, the holding member 88 of the wire fixing member 80 has a fixing side protrusion 88F. The fixed side protrusion 88F is formed on the surface of the holding member 88 facing the connecting member 124, and projects toward the connecting member 124.

The connecting member 124 of the link member 120 has a link side protrusion 124E. The link-side projection 124E is formed on the accommodating surface on the accommodating side of the wire fixing member 80, and projects toward the holding member 88.

16-2 is a diagram corresponding to the state of FIG. In the state of 16-2, the holding

members

84 and 88 are rotated. When the holding

members

84 and 88 rotate, the fixed side protrusion 88F approaches the link side protrusion 124E, and the fixed side protrusion 88F gets over the link side protrusion 124E. When the fixed side protrusion 88F gets over the link side protrusion 124E, a click feeling is generated, so that the user can recognize the stop position of the rotation operation.

At the stop position of the rotation operation (1/2 rotation or 1/4 rotation), the holding

members

84 and 88 have the set chuck tightening force, and the fixed side protrusion 88F gets over the link side protrusion 124E. The pitch and the like of the screw portion 82D (not shown) of the sliding member 82 and the screw portion 88D of the holding member 88 are set.

The example in which the endoscope according to the present invention is applied to a duodenal endoscope has been described above, but the technique of the present invention is not limited to the duodenal mirror and can be applied to other endoscopes such as a colonoscope or an enteroscopy. .. In addition, the present invention may be modified or modified without departing from the gist of the present invention.

10 Endoscope 12 Endoscope system 14 Endoscope processor device 15 Light source device 15A Processor side connector 16 Image processing device 18 Display 20 Standing operation lever 22 Hand operation part 24 Insertion part 26 Flexible part 28 Curved part 30 Tip part 32 Tip body 34 Cap 34A Opening window 34B Wall 34C Bearing 36 Treatment tool Stand 36A Treatment tool guide surface 36B Rotating shaft 37 Treatment tool channel 38 Standing operation wire 40 Wire channel 42 Air supply / water supply tube 44 Cable insertion channel 46 Operation unit body 48 Grip 50 Fold-proof pipe 52 Universal cable 54 Connector device 57 Air supply water supply button 58 Air supply water supply nozzle 59 Suction button 60 Treatment tool outlet 61 Through hole 62 Angle knob 64 Treatment tool introduction port 66 Standing stand storage space 68 Partition 68A Top surface 74 Illumination window 76 Observation window 80 Wire fixing member 82 Sliding member 82A Groove 82B Engagement part 82C Snap regulation member 82D Screw part 82E Tapered surface 82F Sliding side protrusion 84 Holding member 84A Snap 84B Claw part 84C Notch 86 Wire gripping member 86A Tapered surface 86B Slit 88 Holding member 88A Member 88B Member 88C Engagement surface 88D Screw part 88E Fixed side index 88F Fixed side protrusion 90 Movement restricting member 92 Packing 102 Rotating shaft 104 Rotating ring 106 Connecting member 108 Sliding restricting pipe 120 Link member 122 Rod 124 Connector 124A Protrusion 124B Through hole 124C Engagement part Ax Long axis direction

Claims

An operation unit provided with an operation member and
An insertion part provided on the tip side of the operation part and inserted into the subject,
A treatment tool standing stand provided at the tip of the insertion portion and
An upright operation wire that operates the treatment tool stand by connecting the tip end side to the treatment tool stand and pushing and pulling according to the operation of the operation member.
The wire channel through which the standing operation wire is inserted and
It is a wire fixing member for fixing the base end side of the standing operation wire, and a through hole having a length in the longitudinal axis direction through which the standing operation wire is inserted is formed, and a through hole is formed on the outer peripheral surface along the through hole. A wire fixing member integrally including a wire gripping member having a slit, a sliding member accommodating the wire gripping member, and a holding member holding the sliding member.
A sliding control pipe arranged on the side of the base end of the operating portion and slidably accommodating the sliding member of the wire fixing member,
A link member that includes a connecting member that accommodates the wire fixing member and enables connection with the wire fixing member, and a rod that is connected to the operating member, and is arranged outside the operating portion. An endoscope comprising a link member capable of moving the wire fixing member in the longitudinal axis direction of the standing operation wire in conjunction with the operation member.
The wire fixing member tightens the wire gripping member by relatively moving the sliding member and the wire gripping member by the rotational operation of the holding member to reduce the gap between the slits and the through hole. An endoscope for fixing the standing operation wire by reducing the diameter of the endoscope.
The method according to claim 1, wherein the holding member has a snap that elastically deforms, the connecting member has a protrusion, and the holding member and the connecting member are snap-fit-engaged by the snap and the protrusion. Endoscope.
The endoscope according to claim 2, wherein the sliding member has a snap regulating member that regulates elastic deformation of the snap.
The holding member of the wire fixing member has a fixing side index, the connecting member of the link member has a link side index, and the fixing side index and the link side at a stop position of the rotational operation of the holding member. The endoscope according to any one of claims 1 to 3, wherein the index is provided at a position where the stop position can be recognized.
2. The sliding member of the wire fixing member has a sliding side protrusion on an outer peripheral surface, and the snap of the holding member gets over the sliding side protrusion at a stop position of the rotational operation of the holding member. Or the endoscope according to 3.
The holding member of the wire fixing member has a fixing side projection, the connecting member of the link member has a link side projection, and the fixing side projection is on the link side at a stop position of the rotational operation of the holding member. The endoscope according to any one of claims 1 to 3, which overcomes a protrusion.
The sliding member of the wire fixing member has an engaging portion on the outer peripheral surface and has an engaging portion.
A through hole is formed in the connecting member, and the through hole has an engaged portion that allows the sliding member to move in the wire axial direction and engages with the engaging portion, and the sliding member. The endoscope according to any one of claims 1 to 6, which regulates the rotation of the endoscope.