JP2018198731A - Endoscope - Google Patents

Abstract

To provide an endoscope which allows a wire between an operation section and a rising base to be set to a predetermined length and the wire and the rising base to be mounted correctly.SOLUTION: An endoscope 1 includes: an insertion section 5; a direction changing member for changing the direction of the distal end of a treatment instrument T; an operation section 4; a long member for operating the direction changing member; a movement section 21 provided to the operation section 4 and arranged along the long member; an operation lever 11 for moving the movement section 21 in an axial direction; and a fixing mechanism 51 for fixing the long member to the movement section 21 to prevent its movement in a leaving direction L and for releasing the fixing when the long member moves in an entry direction E.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an endoscope.

  2. Description of the Related Art Conventionally, there is an endoscope in which a treatment instrument inserted through a treatment instrument insertion port into a distal end portion of an insertion portion is raised by an elevator provided at the distal end portion of the insertion portion and guided to a subject. The elevator is connected to the operation lever by a wire inserted through the insertion portion, and swings as the wire advances and retreats according to the operation of the operation lever. After being used for the subject, the elevator and the wire are removed from the endoscope and cleaned. After being cleaned, the elevator and the wire are again attached to the endoscope.

  For example, in European Patent No. EP1759626B1, the operation lever is set to a predetermined position and the elevator is laid down with the user's fingers so that the predetermined wire length is provided between the operation unit and the elevator. And an endoscope in which a base and a wire can be attached.

European Patent No. EP1759626B1

  However, in the conventional endoscope, the operation lever is set to a predetermined position by the user's fingers, the raising base is laid down, and the operating section and the wire are connected after the operating section and the raising base are set to a predetermined wire length. Otherwise, there is a concern that the wire and the elevator cannot be attached to perform a predetermined operation.

  Therefore, an object of the present invention is to provide an endoscope in which the wire between the operation unit and the raising base can be more reliably set to a predetermined length, and the wire and the raising base can be correctly attached. .

  An endoscope according to an aspect of the present invention changes an orientation of an insertion portion that is inserted into a lumen in an axial direction and a distal end portion of a treatment instrument that is provided on the distal end side of the insertion portion and is inserted through the insertion portion. A direction changing member, an operation portion connected to the proximal end side of the insertion portion, and inserted through the insertion portion and the operation portion, connected to the direction change member, and moved in the axial direction to the direction A long member for operating the changing member; a moving unit provided in the operating unit; and disposed along the long member; provided in the operating unit; coupled to the moving unit; An operating lever that moves in the axial direction, and the elongate member fixed to the moving portion so as not to move in the retracting direction that is the direction of retracting from the moving portion along the axial direction, opposite to the retracting direction Direction to the moving part along the axial direction. The elongate member to the approach direction is a direction input to release the fixed and moving, having a fixing mechanism.

  According to the present invention, it is possible to provide an endoscope in which the wire between the operation unit and the elevator can be more surely set to a predetermined length, and the wire and the elevator can be correctly attached.

It is explanatory drawing explaining the schematic structure of the endoscope concerning embodiment of this invention. It is explanatory drawing explaining the structure of the insertion part front-end | tip part of an endoscope concerning embodiment of this invention. It is explanatory drawing explaining the structure of the treatment tool direction change mechanism of the endoscope concerning embodiment of this invention. It is sectional drawing cut | disconnected by the IV-IV line of FIG. 3 concerning embodiment of this invention. It is explanatory drawing explaining the structure of the treatment tool direction change mechanism of the endoscope concerning embodiment of this invention. It is explanatory drawing explaining the structure of the treatment tool direction change mechanism of the endoscope concerning embodiment of this invention. It is explanatory drawing explaining the structure of the treatment tool direction change mechanism of the endoscope concerning embodiment of this invention. It is explanatory drawing explaining the structure of the treatment tool direction change mechanism of an endoscope concerning the modification 1 of embodiment of this invention. It is sectional drawing cut | disconnected by the IX-IX line | wire of FIG. 8 concerning the modification 1 of embodiment of this invention. It is explanatory drawing explaining the structure of the treatment tool direction change mechanism of the endoscope concerning the modification 2 of embodiment of this invention. It is explanatory drawing explaining the structure of the treatment tool direction change mechanism of an endoscope concerning the modification 3 of embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Configuration of endoscope 1)
FIG. 1 is an explanatory diagram illustrating a schematic configuration of an endoscope 1 according to an embodiment of the present invention.

  The endoscope 1 includes a scope connector 2, a universal cord 3 extending from the scope connector 2, an operation unit 4 attached to the universal cord 3, and an insertion unit 5 connected to the distal end side of the operation unit 4. And an insertion portion distal end portion D. That is, the operation unit 4 is connected to the proximal end side of the insertion unit 5.

  The scope connector 2 is configured to be connected to an endoscope apparatus main body M such as a power source or a control device.

  The universal cord 3 is connected to the scope connector 2 and the operation unit 4 through various pipes, signal lines and optical fibers (not shown).

  The operation unit 4 is configured so that various operations of the endoscope 1 can be performed. The operation unit 4 includes a treatment instrument insertion port 4a, an angle knob 4b, an air / water supply button 4c, and a suction button 4d.

  The treatment instrument insertion port 4 a can be inserted with a treatment instrument T (FIG. 2) that protrudes from the distal end portion D of the insertion portion via the insertion portion 5. The treatment tool T is, for example, a forceps.

  The angle knob 4b is connected to the bending portion 5a of the insertion portion 5 by a bending wire (not shown), and a bending instruction for the bending portion 5a can be input by a user operation.

  The air / water supply button 4c can input an air supply instruction or a liquid supply instruction from the endoscope apparatus main body M to the nozzle 6c at the distal end portion D of the insertion section by a user operation.

  The suction button 4d can input a suction instruction of a suction target object from the opening 7 of the insertion portion distal end D to the endoscope apparatus main body M by a user operation.

  The insertion portion 5 is formed in an elongated shape and is configured to be inserted in the axial direction into the lumen of the subject. The insertion portion 5 includes a bending portion 5a, a treatment instrument insertion conduit 5b, and a wire insertion conduit 5c.

  The bending portion 5a is provided in the vicinity of the insertion portion distal end portion D, and is bent by the operation of the angle knob 4b.

  The treatment instrument insertion conduit 5b is provided inside the insertion portion 5 so that the treatment instrument T can be inserted, and allows the treatment instrument insertion port 4a and the insertion portion distal end D to communicate with each other.

  The wire insertion conduit 5c is provided inside the operation unit 4 and the insertion unit 5 so that the wire W can be inserted, and allows the operation unit 4 and the insertion unit distal end D to communicate with each other.

  In addition to the treatment instrument insertion conduit 5b and the wire insertion conduit 5c, the insertion portion 5 is provided with various conduits, signal lines, and optical fibers, but description thereof is omitted here.

  FIG. 2 is an explanatory diagram illustrating the configuration of the insertion portion distal end portion D of the endoscope 1 according to the embodiment of the present invention.

  As shown in FIG. 2, the insertion portion distal end portion D is formed in a cylindrical shape by a hard member. The insertion portion distal end portion D is detachably attached to the insertion portion 5. The insertion portion distal end portion D has a flat portion 6, an opening portion 7, and a raising base 8.

  The flat portion 6 is formed in a flat shape by cutting out a part of the outer peripheral side portion of the insertion portion distal end portion D. The flat portion 6 is provided with an illumination window 6a, an observation window 6b, and a nozzle 6c.

  The illumination window 6a is constituted by an optical lens, and irradiates the subject with illumination light guided from the light source of the endoscope apparatus main body M.

  The observation window 6b captures the return light of the subject and projects it on an image sensor (not shown). The imaging element converts the return light into an imaging signal and outputs it to the endoscope apparatus main body M.

  The nozzle 6c discharges the gas or liquid sent by the endoscope apparatus main body M.

  The opening 7 is formed so as to open on the outer peripheral side portion of the insertion portion distal end portion D. The opening 7 communicates with the treatment instrument insertion conduit 5b and the wire insertion conduit 5c.

  FIG. 3 is an explanatory view illustrating the configuration of the treatment instrument direction changing mechanism P according to the embodiment of the present invention.

  As shown in FIG. 3, the raising base 8 is provided on the distal end side of the insertion portion 5 and performs an operation of raising the distal end portion of the treatment tool T inserted through the insertion portion 5. More specifically, the elevator 8 is provided in the opening 7, swings in accordance with the advancement / retraction of the wire W, and guides the treatment instrument T so as to protrude in the outer peripheral direction of the insertion portion distal end D. The elevator base 8 has a rotation shaft hole 8a, a wire connecting portion 8b, and a guide surface 8c.

  The rotation shaft hole 8 a is provided at the base end portion of the elevator base 8 and is rotatably inserted on the rotation shaft in the opening 7.

  The wire connecting portion 8b is provided at the distal end portion of the raising base 8, and is connected to the distal end portion of the wire W that is led into the opening 7 via the wire insertion conduit 5c.

  The guide surface 8c is formed in a concave shape, and guides the treatment instrument T so as to protrude in the outer peripheral direction of the insertion portion distal end portion D.

  That is, the elevator base 8 is a guide member that guides the treatment instrument T so as to protrude in the outer peripheral direction of the insertion portion distal end portion D. In other words, the raising base 8 is provided on the distal end side of the insertion portion 5, and the treatment instrument that has entered the opening 7 via the treatment instrument insertion conduit 5b so as to protrude in the outer peripheral direction of the insertion portion distal end D. A direction changing member that changes the direction of the tip of T.

(Configuration of treatment instrument direction changing mechanism P)
4 is a cross-sectional view taken along line IV-IV in FIG. 3 according to the embodiment of the present invention.

  The treatment instrument direction changing mechanism P is configured to change the direction of the treatment instrument T in accordance with the operation of the operation unit 4. The treatment instrument direction changing mechanism P includes a cylinder C, an operation lever 11, a moving unit 21, and a wire W.

  The cylinder C is provided at the proximal end portion of the wire insertion conduit 5 c in the operation unit 4. The base end of the cylinder C opens to the outside, and the moving part 21 is inserted so as to be able to advance and retreat.

  The operation lever 11 is provided in the operation unit 4. The operation lever 11 allows the user to input an instruction to raise or fall the elevator 8. The operation lever 11 includes a lever main body 12, a disk portion 13, and a rod 14.

  The lever body 12 is attached to the operation unit 4 so as to be rotatable about the lever shaft 12a so that it can be operated by the user. The lever body 12 can be switched to one of a predetermined raising instruction position P1 for instructing raising of the elevator 8 and a predetermined lowering instruction position P2 for instructing raising of the elevator 8 by a rotation operation. is there. For example, the predetermined raising instruction position P1 is a predetermined position on the tip side of the lever shaft 12a (FIG. 3). Further, the predetermined lodging instruction position P2 is a predetermined position on the base end side with respect to the lever shaft 12a (FIG. 5).

  Note that the operation unit 4 may be provided with a stopper (not shown) on which the swinging lever body 12 is stopped.

  The disc part 13 is connected with the lever shaft 12a, and rotational force is transmitted from the lever shaft 12a.

  One end of the rod 14 is connected to the periphery of the disk portion 13, and the other end is connected to the moving portion 21. The rod 14 converts the rotational motion of the disk portion 13 into a linear motion and transmits it to the moving portion 21.

  That is, the operation lever 11 is provided in the operation unit 4 and connected to the moving unit 21 to move the moving unit 21 in the axial direction.

  The moving unit 21 is provided in the operation unit 4 and arranged along the wire W, and connects the base end of the wire W and the operation lever 11. The moving part 21 includes a piston 31, a cylindrical part 41, a fixing mechanism 51, a lid 61, a compression spring 71, and a knob 81.

  Although the material of the piston 31 is not specified, a metal or the like is used as an example, and the piston 31 is connected to the distal end side of the cylindrical portion 41 and is formed in a cylindrical shape. The piston 31 is inserted into the cylinder C and moves forward and backward in the axial direction by the wire W. That is, the piston 31 is connected to the distal end side of the cylindrical portion 41 and moves together with the wire W inside a pipe line through which the wire W in the operation portion 4 is inserted. The piston 31 includes a flange portion 32, O-rings 33 and 34, and a screw portion 35.

  The bowl-shaped portion 32 is made of resin or the like as an example although the material is not specified. The hook-shaped portion 32 is provided on the outer peripheral side portion in the vicinity of the base end portion of the piston 31 and is formed in a hook shape. The rod-shaped portion 32 is connected to the rod 14 for moving the moving portion 21 forward and backward. That is, the operation lever 11 is connected to the piston 31.

  The O-rings 33 and 34 are made of rubber, elastic resin, or the like as an example, although the material is not specified. The O-ring 33 is provided on the outer peripheral side of the tip of the piston 31 so that the piston 31 is inserted into the cylinder C in a watertight manner. That is, the piston 31 has an O-ring 33 that is a sealing member that ensures watertightness between the piston 31 and the cylinder C that is a pipe line through which the piston 31 is inserted.

  The O-ring 34 is provided on the outer peripheral side portion closer to the base end side than the flange portion 32 so that the piston 31 is attached to the cylindrical portion 41 in a watertight manner.

  The threaded portion 35 is provided on the outer peripheral side portion of the base end portion of the piston 31 so that the threaded portion 35 can be screwed to the tubular portion 41.

  Although the cylindrical part 41 does not specify material, it is comprised by using resin etc. as a material as an example, and is formed in a cylindrical shape. The cylindrical portion 41 is provided so as to surround the fixing mechanism 51, and the wire W is inserted therein. The cylindrical part 41 includes an attachment cylinder 42, a wire insertion port 43, a taper part 44, and a screw part 45.

  The mounting cylinder 42 is provided at the tip of the cylindrical portion 41. The attachment cylinder 42 is formed in a short cylinder shape. The mounting cylinder 42 has a stopper plate 42a and a screw portion 42b.

  The stopper plate 42a is formed at the base end portion of the mounting cylinder 42 so as to be orthogonal to the axial direction so that the base end of the piston 31 is stopped.

  The screw portion 42b is provided on the inner peripheral portion of the mounting cylinder 42 so that the screw portion 42b can be screwed with the screw portion 35. When the screw-like portion 42 b is screwed to the screw-like portion 35, the inner peripheral portion of the mounting cylinder 42 hits the O-ring 34. In FIG. 3, the base end of the piston 31 is abutted by the abutment plate 42 a, but the front end of the mounting cylinder 42 may be abutted against the hook-shaped portion 32.

  The wire insertion port 43 is provided at a position facing the opening on the proximal end side of the piston 31 so that the wire W can be inserted. In the example of FIG. 3, the wire insertion port 43 is provided at the center of the stopper plate 42 a.

  The tapered portion 44 is provided on the proximal end side with respect to the wire insertion port 43 and is formed so that the inner diameter becomes smaller toward the distal end. That is, the taper portion 44 is formed in an inner peripheral portion of a portion where a fixing body 54 described later is disposed so as to narrow toward the withdrawal direction L.

  The screw portion 45 is provided on the inner peripheral side portion of the base end portion of the tubular portion 41.

  Although the material is not specified, the fixing mechanism 51 is made of resin or the like as an example. The fixing mechanism 51 fixes the wire W to the moving unit 21 so that the wire W does not move from the fixing mechanism 51 in the withdrawal direction L, which is the direction in which the wire W is withdrawn, and the entry direction in which the wire W enters the fixing mechanism 51. When the wire W moves to E, the fixing is released. That is, the fixing mechanism 51 fixes the wire W to the moving unit 21 so as not to move in the retreating direction L that is a direction of retreating from the moving unit 21 along the axial direction, and is in a direction opposite to the retreating direction L. When the wire W moves in the approach direction E, which is the direction of entering the moving unit 21 along the axial direction, the fixation is released. The fixing mechanism 51 includes a cylindrical body 52, a holding portion 53, a fixing body 54, and a screw portion 55.

  The cylindrical body 52 is provided along the axial direction so that the opening on the distal end side faces the wire insertion port 43 so that the wire W can be inserted into the inner peripheral side.

  The holding part 53 is provided at the tip of the cylindrical body 52 and holds the fixed body 54. The holding part 53 includes holding plates 53a and 53b, a column body 53c, and an opening 53d.

  The holding plate 53a is formed in a flange shape so as to protrude from the outer peripheral side portion.

  The holding plate 53b is provided on the tip side of the holding plate 53a so as to be orthogonal to the axial direction, and is formed in a ring shape.

  The column body 53c is provided between the holding plate 53a and the holding plate 53b. In the example of FIG. 4, three column bodies 53c are provided at intervals in the circumferential direction.

  The opening 53d is formed in a portion surrounded by the holding plates 53a and 53b and the column body 53c. A plurality of openings 53d are provided on the peripheral side portion so as to allow communication between the inner peripheral portion and the outside.

  Although the material is not specified, the fixed body 54 is made of rubber or metal as an example, is formed in a spherical shape, and is movably disposed in the opening 53d. In other words, the fixed body 54 is loosely fitted in the opening 53 d provided in a part of the peripheral wall of the cylindrical body 52 of the fixing mechanism 51. The fixed body 54 is provided around the wire W and generates a frictional force with the outer peripheral surface of the wire W moving in the withdrawal direction L. More specifically, the fixed body 54 is held by the cylindrical body 52 so as to contact the tapered portion 44 and the wire W, and contacts the wire W to fix the wire W. In other words, a plurality of the fixing bodies 54 are provided so as to surround the wire W, and when it comes into contact with the taper portion 44, it comes into contact with the wire W and fixes the wire W by frictional force.

  3 and 4, the three fixed bodies 54 are provided, but the number is not limited to three, and may be two or four or more.

  The threaded portion 55 is provided on the outer peripheral side portion of the base end portion of the cylindrical body 52.

  Although the material of the lid 61 is not specified, the lid 61 is made of resin or the like as an example, is formed in a ring shape, and the cylindrical body 52 is inserted into a hole provided in the center portion, and is attached to the base end portion of the storage cylinder. The lid 61 includes a screw portion 62 and an O-ring 63.

  The screw portion 62 is provided on the distal end side of the lid 61 and is screwed to the screw portion 45.

  The O-ring 63 is provided on the inner periphery of the hole and makes the inside of the tubular portion 41 watertight.

  The compression spring 71 is made of a metal or the like as an example although the material is not specified. The compression spring 71 is provided between the lid 61 and the holding plate 53a, and biases the fixing mechanism 51 in the retreat direction L.

  That is, the compression spring 71 is an urging portion that is provided in the tubular portion 41 and has a predetermined urging force that urges the fixing mechanism 51 in the retreat direction L with respect to the tubular portion 41. The compression spring 71 operates the fixing mechanism 51 by pressing the fixing mechanism 51 against the tubular portion 41 in the retracting direction L when the wire W moves in the retracting direction L. The predetermined urging force is set empirically or experimentally to at least an amount of force that does not release the fixing of the moving part 21 and the wire W when the elevator base 8 is laid down.

  The knob 81 is provided at the proximal end portion of the fixing mechanism 51. When the knob 81 is pulled in a direction away from the cylindrical portion 41 by an external force, the fixing body 54 is moved in the entering direction E to be separated from the wire W, and Release the fixation of the wire W. The knob 81 has a screw portion 82 and is screwed to the screw portion 55.

  The moving part 21 is screwed into the screw parts 35 and 42b, the fixing mechanism 51 is inserted into the cylindrical part 41, and the compression spring 71 is externally inserted into the cylinder 52 so as to hit the holding plate 53a. The lid 61 is screwed to the base end portion, and the knob 81 is screwed to the base end portion of the cylindrical body 52 to be assembled.

  Although the material is not specified, the wire W is made of metal or the like as an example. The wire W is inserted into the wire insertion conduit 5 c, the tip end portion is connected to the elevator 8, and the other end portion is connected to the moving portion 21.

  That is, the wire W is a long member. The wire W is detachably attached to the moving unit 21. The wire W is inserted through the insertion portion 5 and the operation portion 4 and connected to the raising base 8 and moves in the axial direction to operate the raising base 8.

(Function)
The operation of the treatment instrument direction changing mechanism P of the endoscope 1 according to the embodiment will be described.

  5-7 is explanatory drawing explaining the structure of the treatment tool direction change mechanism P of the endoscope 1 concerning embodiment of this invention.

  The user inserts the wire W connected to the elevator 8 into the wire insertion conduit 5 c, attaches the distal end portion D of the insertion portion to the insertion portion 5, and pulls out the proximal end portion of the wire W from the cylinder C and the piston 31. Subsequently, the user inserts the wire W into the wire insertion opening 43 and attaches the attachment cylinder 42 to the proximal end portion of the piston 31. The wire W is inserted from the wire insertion port 43 to the inner peripheral side of the cylindrical body 52.

  As shown in FIG. 5, when the lever main body 12 is rotated toward a predetermined lodging instruction position P <b> 2 by the user's finger, the moving unit 21 is moved in the distal direction by the disk unit 13 and the rod 14.

  When moving in the distal direction, the moving unit 21 pushes the wire W in the distal direction and causes the elevator 8 to fall. When the moving unit 21 further moves in the distal direction in the state where the elevator 8 is lying down, the fixing of the moving unit 21 by the fixing mechanism 51 is released, and the wire W moves in the fixing direction 51 in the approach direction E.

  When the elevator 8 falls down and the lever main body 12 reaches a predetermined lodging instruction position P2, the wire length between the moving unit 21 and the elevator 8 is set to a predetermined wire length, and the fixing mechanism 51 causes the wire W to move to the moving unit. 21 is fixed. The predetermined wire length is the length of the wire between the moving unit 21 and the elevator 8 that causes the elevator 8 to perform a predetermined operation.

  As shown in FIG. 6, when the lever main body 12 is rotated to the predetermined raising instruction position P <b> 1, the wire W pulls up the raising table 8 and raises it.

  As shown in FIG. 7, when the knob 81 is pulled by the user's finger, the fixed body 54 is separated from the wire W, and the fixing of the moving unit 21 and the wire W is released. Furthermore, the wire W is withdrawn from the tubular portion 41 by removing the distal end portion D of the insertion portion from the insertion portion 5 and pulling out the wire W connected to the raising base 8 from the insertion portion 5. Further, when the screwing of the screw portions 35 and 42 b is released, the cylindrical portion 41 is detached from the piston 31. In preparation for the next use, the user performs a regeneration process such as cleaning of the distal end portion D of the insertion portion and the wire W.

  Thereby, the user can attach the wire W and the raising base 8 without worrying about raising or lowering of the raising base 8 and the rotation position of the lever main body 12, and the lever main body 12 is operated by rotating the lever main body 12. When the upper base 8 is laid down, the wire length between the moving unit 21 and the raising base 8 is adjusted to a predetermined wire length.

  According to the above-described embodiment, the endoscope 1 can move the operation lever 11 to a predetermined position more reliably, and can set the wire W between the operation unit 4 and the elevator 8 to a predetermined length. The wire W and the raising base 8 can be correctly attached.

(Modification 1 of embodiment)
In the embodiment, the moving unit 21 fixes the wire W by the fixing mechanism 51 accommodated in the cylindrical part 41, but the wire W is fixed by the fixing mechanism 121 having a ratchet structure accommodated in the cylindrical part 101. It doesn't matter.

  FIG. 8 is an explanatory diagram illustrating the configuration of the treatment instrument direction changing mechanism P of the endoscope 1 according to the first modification of the embodiment of the present invention. FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8 according to Modification 1 of the embodiment of the present invention. In the description of this modified example, the description of the same configuration as that of the other embodiments and modified examples is omitted.

  As shown in FIG. 8, the wire insertion opening 43 has a chamfered portion 43a formed in a chamfered shape at the edge so that the wire W can be inserted smoothly.

  The cylindrical part 101 includes a wire housing part 111 and a fixing mechanism 121.

  The wire housing portion 111 communicates with the wire insertion port 43 and the wire W is inserted therein.

  As shown in FIG. 9, the fixing mechanism 121 includes a cam 131, a cam shaft 141, and a torsion spring 151.

  The cam 131 is attached to the camshaft 141 and has ratchet teeth 132 at a portion where it hits the wire W.

  One end of the camshaft 141 is inserted into the concave portion 142 in the cylindrical portion 101, and is inserted into the through hole 143 of the cylindrical portion 101, and is rotatably supported by the concave portion 142 and the through hole 143. The other end of the camshaft 141 is brought out of the cylindrical portion 101, and a handle 144 is continuously provided so that the camshaft 141 can be rotated by a user's fingers. An O-ring 145 is provided on the inner periphery of the through-hole 143 so that the tubular portion 101 can be brought into a watertight state by hitting the camshaft 141.

  The torsion spring 151 is attached to the camshaft 141 between the recess 142 and the cam 131, and urges the cam 131 in the direction in which the ratchet teeth 132 come into contact with the wire W.

  When the moving unit 21 moves in the distal direction, the fixing of the fixing unit 121 to the moving unit 21 is released, and the wire W moves in the entering direction E through the fixing mechanism 121. Subsequently, when the moving unit 21 moves in the proximal direction, the ratchet teeth 132 hit the wire W, and the wire W is fixed to the moving unit 21. As a result, the distance between the moving unit 21 and the elevator 8 is set to a predetermined wire length, and the fixing mechanism 121 fixes the wire W to the moving unit 21.

  The fixing mechanism 121 fixes the wire W accommodated in the wire accommodating part 111 to the moving part 21 so as not to move in the withdrawal direction L, and releases the fixation when the wire W moves in the entry direction E.

  That is, the fixing mechanism 121 includes a cam 131 having ratchet teeth 132, and the ratchet teeth 132 are arranged so as to contact the wire W, and are fixed and released by the cam 131.

  When the handle 144 is grasped by the user's finger and the cam 131 is rotated so as to be separated from the wire W, the fixing of the moving unit 21 and the wire W is released. Further, by removing the distal end portion D of the insertion portion from the insertion portion 5 and pulling out the wire W connected to the raising base 8, the wire W is withdrawn from the tubular portion 101.

(Modification 2 of embodiment)
In the first modification of the embodiment, the wire W is fixed by the fixing mechanism 121 having the cam 131. However, the wire W may be fixed by pressing the fixing plate 231 with the compression spring 241.

  FIG. 10 is an explanatory diagram illustrating the configuration of the treatment instrument direction changing mechanism P of the endoscope 1 according to the second modification of the embodiment of the present invention. In the description of this modified example, the description of the same configuration as that of the other embodiments and modified examples is omitted.

  As shown in FIG. 10, the cylindrical portion 201 includes a wire housing portion 211 and a fixing mechanism 221.

  The wire accommodating portion 211 communicates with the wire insertion port 43 and the wire W is inserted.

  The fixing mechanism 221 includes a fixing plate 231 and a compression spring 241.

  The fixed plate 231 is formed in a plate shape. The fixing plate 231 has a tooth portion 232 formed in a sawtooth shape in cross section on the wire contact surface. The tooth portion 232 is configured such that the wire W moving in the entry direction E is not locked and the wire W moving in the withdrawal direction L is locked.

  One end of the compression spring 241 is attached to the recess 242 in the cylindrical portion 201, the other end is attached to the fixing plate 231, and the fixing plate 231 is biased so as to contact the wire W.

  When the moving unit 21 moves in the distal direction, the fixing of the moving unit 21 by the fixing mechanism 221 is released, and the wire W moves in the entering direction E through the fixing mechanism 221. Subsequently, when the moving part 21 moves in the proximal direction, the tooth part 232 locks the wire W, and the wire W is fixed to the moving part 21. A predetermined wire length is set between the moving unit 21 and the elevator 8, and the fixing mechanism 221 fixes the wire W to the moving unit 21.

  The fixing mechanism 221 fixes the wire W accommodated in the wire accommodating part 211 to the moving part 21 so as not to move in the withdrawal direction L, and releases the fixation when the wire W moves in the entry direction E.

  That is, the fixing mechanism 221 includes a fixing plate 231 having a tooth portion 232 formed in a sawtooth shape in cross section, and a compression spring 241, and the tooth portion 232 is disposed so as to contact the wire W, and the compression spring 241 is The fixing plate 231 is attached, and the fixing plate 231 is urged in the direction in which the tooth portion 232 contacts the wire W, and the fixing plate 231 fixes and releases the fixing.

(Modification 3 of embodiment)
In the first modification of the embodiment, the wire W is fixed by the fixing mechanism 121 having the cam 131, and in the second modification, the fixing plate 231 is pressed against the compression spring 241 to fix the wire W, but the wire W is fixed by the plate spring 331. You may comprise so that W may be fixed.

  FIG. 11 is an explanatory diagram illustrating the configuration of the treatment instrument direction changing mechanism P of the endoscope 1 according to the third modification of the embodiment of the present invention. In the description of this modified example, the description of the same configuration as that of the other embodiments and modified examples is omitted.

  As shown in FIG. 11, the cylindrical portion 301 includes a wire housing portion 311 and a fixing mechanism 321.

  The wire accommodating portion 311 communicates with the wire insertion port 43 and the wire W is inserted therein.

  The fixing mechanism 321 has a leaf spring 331.

  The leaf spring 331 has a mating portion 332 and an insertion hole 333 formed by folding a single plate into two and aligning both ends in the longitudinal direction.

  The wire W is inserted from the outside into the insertion hole 333 and is sandwiched between the mating portions 332. The leaf spring 331 is configured such that the wire W moving in the entry direction E is not locked and the wire W moving in the withdrawal direction L is locked.

  When the moving unit 21 moves in the distal direction, the fixing to the moving unit 21 by the fixing mechanism 321 is released, and the wire W moves in the entering direction E through the fixing mechanism 321. Subsequently, when the moving unit 21 moves in the proximal direction, the mating unit 332 locks the wire W, and the wire W is fixed to the moving unit 21. Thereby, the distance between the moving unit 21 and the elevator 8 is set to a predetermined wire length, and the fixing mechanism 321 fixes the wire W to the moving unit 21.

  The fixing mechanism 321 fixes the wire W accommodated in the wire accommodating portion 311 to the moving portion 21 so as not to move in the withdrawal direction L, and releases the fixation when the wire W moves in the entry direction E.

  In other words, the fixing mechanism 321 includes a plate spring 331, and the plate spring 331 includes a mating portion 332 formed by folding a single plate into two and aligning both ends in the longitudinal direction, and an insertion hole 333. Then, the wire W inserted through the insertion hole 333 and clamped by the mating portion 332 is fixed and released.

  In the embodiment and the modification, the elevator base 8 swings according to the advancement / retraction of the wire W, but may be anything that operates according to the advancement / retraction of the wire W, and is not limited to the swinging base. For example, the raising base 8 may be configured to slide in the forward / backward direction in accordance with the advance / retreat of the wire W and raise the distal end portion of the treatment instrument T.

  In the embodiment and the modification, the raising base 8 raises the treatment instrument T, but may be a treatment instrument swinging base that swings the treatment instrument T.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Endoscope 2 Scope connector 3 Universal cord 4 Operation part 4a Treatment tool insertion port 4b Angle knob 4c Air / water supply button 4d Suction button 5 Insertion part 5a Bending part 5b Treatment tool insertion line 5c Wire insertion line 6 Flat part 6a Illumination window 6b Observation window 6c Nozzle 7 Opening portion 8 Raising base 8a Rotating shaft hole 8b Wire connecting portion 8c Guide surface 11 Operation lever 12 Lever main body 12a Lever shaft 13 Disc portion 14 Rod 21 Moving portion 31 Piston 32 Gutter-shaped portion 33 O-ring 34 O-ring 35 Screw portion 41 Tube portion 42 Attachment tube 42a Stop plate 42b Screw portion 43 Wire insertion port 43a Chamfer 44 Tapered portion 45 Screw portion 51 Fixing mechanism 52 Tube 53 Holding portion 53a Holding plate 53b Holding Plate 53c Column body 53d Opening 54 Fixing body 55 Screw part 61 Lid 62 Screw part 63 O-ring 71 Compression spring DESCRIPTION OF SYMBOLS 1 Knob 82 Screw part 101 Tube part 111 Wire accommodating part 121 Fixing mechanism 131 Cam 132 Ratchet tooth 141 Cam shaft 142 Recess 143 Through-hole 144 Handle 145 O-ring 151 Torsion spring 201 Cylindrical part 211 Wire accommodating part 221 Fixing mechanism 231 Fixing plate 232 Tooth part 241 Compression spring 242 Recessed part 301 Cylindrical part 311 Wire accommodating part 321 Fixing mechanism 331 Leaf spring 332 Matching part 333 Insertion hole C Cylinder D Insertion part distal end E Entrance direction L Exit direction M Endoscope body P Treatment instrument direction change mechanism P1 Predetermined raising instruction position P2 Predetermined lodging instruction position T Treatment instrument W wire

Claims (14)

An insertion portion that is inserted axially into the lumen;
A direction changing member that is provided on the distal end side of the insertion portion and changes the direction of the distal end portion of the treatment instrument inserted through the insertion portion;
An operation unit continuously provided on the proximal end side of the insertion unit;
A long member that is inserted through the insertion portion and the operation portion, is connected to the direction changing member, and moves in the axial direction to operate the direction changing member;
A moving unit provided in the operating unit and arranged along the elongated member;
An operation lever provided in the operation unit, connected to the moving unit, and moving the moving unit in the axial direction;
The elongate member is fixed to the moving part so as not to move in the retreating direction that is a direction retreating from the moving part along the axial direction, and is in a direction opposite to the retreating direction and along the axial direction. A fixing mechanism that releases the fixing when the elongate member moves in an entering direction that is a direction to enter the moving part;
The endoscope characterized by having. The moving unit is
A cylindrical portion provided so as to surround the fixing mechanism and into which the long member is inserted;
An urging portion having a predetermined urging force for urging the fixing mechanism in the withdrawal direction with respect to the tubular portion,
The endoscope according to claim 1. The moving part has a piston,
The piston is connected to the distal end side of the cylindrical portion, and moves with the long member inside a pipe line through which the long member in the operation portion is inserted.
The operating lever is coupled to the piston;
The endoscope according to claim 2. Having a sealing member,
The sealing member ensures watertightness between the piston and a pipe line through which the piston is inserted;
The endoscope according to claim 3, wherein   The endoscope according to claim 2, wherein the predetermined urging force is set to at least an amount of force that is not released when the direction changing member is laid down. The fixing mechanism includes a fixing body that is provided around the long member and generates a frictional force with an outer peripheral surface of the long member that moves in the withdrawal direction.
The cylindrical portion has a tapered portion that narrows toward the withdrawal direction on the inner peripheral portion of the portion where the fixed body is disposed.
The endoscope according to claim 2.   The endoscope according to claim 6, wherein the fixed body is loosely fitted in an opening provided in a part of a peripheral wall of the fixing mechanism. The fixing mechanism has a knob,
The knob is provided at a base end portion of the fixing mechanism, and when the knob is pulled in a direction away from the cylindrical portion by an external force, the fixing body is moved in the entering direction to be separated from the long member, and the movement The fixing of the part and the long member,
The endoscope according to claim 6. The fixed body is provided in a plurality so as to surround the long member, and when it hits the taper portion, it presses against the long member and fixes the long member by a frictional force.
The endoscope according to claim 6.   The endoscope according to claim 1, wherein the direction changing member is an elevator for raising the treatment instrument. The direction changing member is detachably provided in the insertion portion,
The long member is detachably attached to the moving part.
The endoscope according to claim 1. The fixing mechanism has a cam having ratchet teeth;
The ratchet teeth are arranged to hit the elongated member;
The cam performs the fixing of the long member to the moving part and the releasing of the fixing.
The endoscope according to claim 1. The fixing mechanism includes a fixing plate having a tooth portion formed in a sawtooth shape in cross section, and a compression spring,
The tooth portion is arranged so as to hit the long member,
The compression spring is attached to the fixed plate, and biases the fixed plate in a direction in which the tooth portion hits the long member,
The fixing plate performs the fixing of the long member to the moving portion and the releasing of the fixing.
The endoscope according to claim 1. The fixing mechanism has a leaf spring,
The leaf spring has a mating portion formed by folding one plate in two and aligning both ends in the longitudinal direction, and an insertion hole, and is inserted through the insertion hole and sandwiched by the mating portion. The fixing of the long member to the moving part and the releasing of the fixing are performed.
The endoscope according to claim 1.

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