JP2016154772A - Endoscope and coil fixing device of endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope and a coil fixing device of the endoscope capable of improving the durability and repairability of an operation wire in a coil fixing unit arranged inside the operation unit.SOLUTION: The proximal end side of a tightly wound coil 72 is fixed inside the operation unit 12 by a coil fixing unit 64 comprising a pipe member 74 and a sleeve member 78. The proximal end 73 of the tightly wound coil 72 is inserted into the pipe member 74 and the pipe member 74 is jointed to the tightly wound coil 72 by welding with the proximal end 73 of the tightly wound coil 72 arranged more proximally than a first proximal end 75 of the pipe member 74. The pipe member 74 with the tightly wound coil 72 joined thereto is inserted into the sleeve member 78 and the pipe member 74 is joined to the sleeve member 78 by soldering. The solder is melted to remove the pipe member 74 from the sleeve member 78 and the position at which the pipe member 74 is rejoined to the sleeve member 78 is shifted distally relative to their previously jointed position to adjust the length of the tightly wound coil 72.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an endoscope and a coil fixing device for an endoscope, and in particular, includes a coil fixing unit for fixing an adhesion coil that protects an operation wire for bending operation of a bending portion to an endoscope operation portion. The present invention relates to an endoscope and a coil fixing device for an endoscope.

  The insertion portion of the endoscope that is inserted into the subject includes a soft portion, a bending portion, and a distal end hard portion from the operation portion of the endoscope toward the distal end portion. The bending portion is composed of a plurality of cylindrical bending pieces called angle pieces or node rings. These bending pieces are arranged side by side in the axial direction of the insertion portion of the endoscope, and the connecting pieces formed at the ends of the adjacent bending pieces are connected to each other via a shaft such as a rivet pin. Thus, a curved portion is configured.

  A plurality of operation wires for bending the bending portion are inserted through the flexible portion and the bending portion. The distal ends of these operation wires are fixed to a bending piece disposed at the forefront of the bending portion, and the proximal ends of these operation wires are attached to the bending operation member of the operation portion. When the operation wire is pushed and pulled by the bending operation member, the plurality of bending pieces are rotated around the rivet pin, and the bending portion is operated to bend.

  The operation wire is inserted through the contact coil and protected in the soft part, and extends from the insertion part to the operation part together with the contact coil. In addition, the operation wire is inserted into the protection pipe and protected inside the operation unit. The protective pipe is fixed to the operation portion so that the operation wire can be pulled.

  Patent Document 1 discloses a coil fixing unit for a close-contact coil in an operation unit.

  In the coil fixing unit of Patent Document 1, a fitting pipe of a size that fits the proximal end side of the close-contact coil is fixed to the distal end of the protective pipe, and the proximal end side of the close-contact coil is fitted into the fit pipe, The proximal end of the coil is in contact with the distal end of the protective pipe. The operation wire is inserted through the protection pipe, and the protection pipe is fixed at a predetermined position of the operation unit. Further, the protective pipe is fixed to the sleeve by solder in a form in which the base end side protrudes from the base end side of the sleeve toward the base end side. The sleeve is engaged and held by the bracket of the operation unit. The bracket is attached to a support member to which the bending operation member is attached.

  On the other hand, Patent Literature 2 discloses a wire support portion for an operation wire in an operation portion.

  7A is a perspective view showing a part of the wire support portion 100 of Patent Document 2, and FIG. 7B is a longitudinal sectional view of the wire support portion 100 shown in FIG. 7A. is there.

  According to FIGS. 7A and 7B, the operation wire 102 is inserted through the protection member 104 formed of a protection pipe, and the protection member 104 is inserted through the fixing sleeve 106. The protection member 104 and the fixing sleeve 106 are fixed by solder. The fixing sleeve 106 is fitted and held in a bracket (not shown), and this bracket is attached to a support member to which the bending operation member of the operation unit is attached. Accordingly, the operation wire 102 is supported by the support member via the protective member 104, the fixing sleeve 106, and the bracket in the operation unit.

JP 20066641 A Japanese Patent Laid-Open No. 7-23893

  By the way, the insertion portion is required to have flexibility for insertion into a subject and durability against cleaning and disinfection, and periodic repairs are indispensable. That is, there is a demand for a structure that can appropriately perform periodic repairs in the coil fixing unit and the wire support portion of the contact coil.

  In the fixing portions of Patent Documents 1 and 2, when the operation wire is loosened, as shown in FIG. There was a fear. That is, the fixing parts of Patent Documents 1 and 2 have a problem with the durability of the operation wire.

  FIG. 8 shows a coil fixing unit 110 that solves the above-mentioned problems. 8A is a perspective view of the coil fixing unit 110, FIG. 8B is a longitudinal sectional view of the coil fixing unit 110, and FIG. 8C is an enlarged sectional view of a main part of the coil fixing unit 110.

  In order to improve the durability of the operation wire 102, the coil fixing unit shown in FIG. 8 replaces the protective member 104 shown in FIG. 108 and the fixing sleeve 106 are fixed by solder. That is, since the close contact coil 108 has a configuration in which a thin wire is closely wound in a pipe shape, the proximal end 109 of the close contact coil 108 is rounded, so that the operation wire 102 contacts the proximal end 109. However, the wear of the operation wire 102 can be greatly reduced.

  Further, according to the coil fixing unit 110 of FIG. 8, the adhesive coil 108 and the fixing sleeve 106 can be easily separated by simply melting the solidified solder at the time of repair for adjusting the length of the adhesive coil 108. There is an advantage that repair becomes easy. Reference numeral 107 in FIG. 8 denotes a solder injection port provided in the fixing sleeve 106, and solder is injected between the close contact coil 108 and the fixing sleeve 106 from the solder injection port 107.

  However, in the coil fixing unit 110 of FIG. 8, when the contact coil 108 and the fixing sleeve 106 are fixed by solder, solder and flux enter the inside of the contact coil 108 and adhere to the operation wire 102. There was a risk of affecting the durability of the wire 102.

  Therefore, there is a method of fixing the contact coil 108 and the fixing sleeve 106 by a joining method such as welding or caulking without using solder. In this fixing method, the contact coil 108 and the fixing sleeve 106 are connected to each other. Since it was difficult to separate, there was a problem that hindered repair.

  The present invention has been made in view of such circumstances, and in a coil fixing unit provided inside an operation unit, an endoscope and an endoscope that can improve durability and repairability of an operation wire. An object is to provide a coil fixing device.

  In one aspect of the present invention, in order to achieve the object of the present invention, an insertion portion having a distal end hard portion, a bending portion, and a flexible portion in order from the distal end side, and an operation portion connected to the proximal end portion of the insertion portion; An operation wire that is arranged from the bending portion or the hard end of the tip to the operation portion and is bent by being pushed and pulled by operation of the operation portion, and an operation wire that is arranged from the soft portion to the operation portion, and the operation wire is inserted in a freely reciprocating manner. A close contact coil, a coil fixing unit that is provided inside the operation portion and fixes a proximal end portion of the close contact coil, and a pedestal portion that is provided inside the operation portion and attaches the coil fixation unit to the operation portion. The coil fixing unit is a pipe member having a first tip, a first base end, and a first longitudinal axis, and a first contact coil is inserted between the first tip and the first base end. An insertion path is provided, and the first insertion path is A pipe member having a first length in the direction of one longitudinal axis and having a first joint that is joined to the close-contact coil in a state where the base end of the close-contact coil is disposed closer to the base end side than the first base end; A sleeve member having a second distal end, a second proximal end, and a second longitudinal axis parallel to the first longitudinal axis, wherein the pipe member is inserted between the second distal end and the second proximal end. A second insertion passage is provided, the second insertion passage has a second length shorter than the first length in the direction of the second longitudinal axis, and the second base end is the front end side of the first base end of the pipe member. There is provided an endoscope having a sleeve member having a second joint portion joined to a pipe member in a state of being disposed on the base member and a fixed portion to be secured to the pedestal portion.

  In one aspect of the present invention, in order to achieve the object of the present invention, an insertion portion having a distal end hard portion, a bending portion, and a flexible portion in order from the distal end side, and an operation portion connected to the proximal end portion of the insertion portion; An operation wire that is arranged from the bending portion or the hard end of the tip to the operation portion and is bent by being pushed and pulled by operation of the operation portion, and an operation wire that is arranged from the soft portion to the operation portion, and the operation wire is inserted in a freely reciprocating manner. In an endoscope comprising a contact coil, a coil fixing device for fixing the contact coil to the operation unit, which is attached to a pedestal part provided inside the operation unit, and is a proximal end portion of the contact coil The coil fixing unit is a pipe member having a first tip, a first base end, and a first longitudinal axis, and is between the first tip and the first base end. First insertion through which a close coil is inserted The first insertion passage has a first length in the direction of the first longitudinal axis, and is joined to the close contact coil with the proximal end of the close contact coil disposed closer to the proximal end than the first proximal end. A sleeve member having a first joining portion, a second tip, a second base, and a second longitudinal axis parallel to the first longitudinal axis, wherein the second tip and the second base A second insertion passage through which the pipe member is inserted is provided between the end, the second insertion passage has a second length shorter than the first length in the direction of the second longitudinal axis, and the second base end is An inner sleeve having a second joint portion that is joined to the pipe member in a state of being disposed on the distal end side of the first base end of the pipe member, and a fixed member that is secured to the pedestal portion; A coil fixing device for an endoscope is provided.

  According to one aspect of the present invention, the proximal end side of the close contact coil is fixed to the inside of the operation unit via the base by the pipe member and the sleeve member constituting the coil fixing unit.

  The close contact coil is inserted into the first insertion passage of the pipe member, and the pipe member is joined to the close contact coil in a state where the proximal end of the close contact coil is disposed on the proximal end side with respect to the first proximal end of the pipe member. Thereby, when the operation wire inserted through the contact coil is loosened, it is possible to reliably prevent the operation wire from being rubbed and worn against the first base end of the pipe member. In other words, the operation wire comes into contact with the proximal end of the close contact coil, but the surface of the proximal end is a smooth circular surface, so there is no fear of the operation wire being worn.

  Further, when repairing the adjustment of the length of the contact coil performed inside the operation unit, the pipe member is removed from the sleeve member, and the rejoining position of the pipe member with respect to the sleeve member is based on the previous joining position. Shift to the end side and adjust the length of the contact coil. Thereby, repair can be performed easily.

  In one embodiment of the present invention, the pipe member has a first joint surface that directly joins to the tight coil, and the sleeve member has a second joint surface that indirectly joins the pipe member via a bonding agent. Is preferred.

  According to one aspect of the present invention, the close contact coil and the pipe member are directly joined at the first joint surface of the first joint portion, and the pipe member and the sleeve member are joined at the second joint surface of the second joint portion. Are indirectly bonded through a bonding agent.

  In one embodiment of the present invention, it is preferable that the joining means for joining the pipe member and the close contact coil is welding or caulking.

  In one embodiment of the present invention, the bonding agent is preferably any one of solder, brazing, an adhesive, a thermosetting resin, and an ultraviolet curable resin.

  According to one embodiment of the present invention, a bonding means and a bonding agent are provided.

  That is, the joining means is a form in which the close contact coil and the pipe member are directly joined to each other by welding or caulking that is difficult to separate at the first joint.

  The bonding agent is solder, brazing, adhesive, thermosetting resin, ultraviolet curable resin that can be easily separated at the second bonding portion between the pipe member to which the adhesive coil is bonded and the sleeve member through which the pipe member is inserted. It is set as the form which is indirectly joined in any of these.

  As a result, the bonding agent such as solder does not enter the inside of the contact coil, and the pipe member and the sleeve member can be easily separated by dissolving the bonding agent at the time of repair. Easy to adjust.

  In one embodiment of the present invention, the sleeve member preferably has an injection port for injecting the bonding agent into the second insertion passage.

  In one embodiment of the present invention, the injection port is preferably provided at the second tip of the sleeve member.

  According to one aspect of the present invention, by providing the sleeve member with the injection port, the bonding agent can be easily injected from the injection port into the second insertion passage. Further, by providing the injection port at the second tip of the sleeve member, the bonding agent can be easily injected from the opening at the second tip into the second insertion passage.

  In one embodiment of the present invention, when the length of the proximal end of the contact coil protruding from the first base end of the pipe member to the proximal end side is defined as the coil protrusion amount, the coil protrusion amount is 0.5 turns of the contact coil. It is preferable that the length is equal to or more than 2 turns.

  According to one aspect of the present invention, the wear of the operation wire can be reliably prevented if the number of turns of the contact coil is 0.5 or more. In addition, since the number of turns is set to 2 or less, problems caused by excessive coil protrusion amount, for example, the proximal end of the protruded close contact coil contacts other parts inside the operation unit and obstructs operation of the operation wire. To solve the problem.

  In one embodiment of the present invention, it is preferable that the sleeve member is disposed closer to the base end side than the first joint portion.

  According to one aspect of the present invention, when the extension length of the first base end of the pipe member from the second base end of the sleeve member becomes longer during the repair for adjusting the length of the contact coil, the pipe The length of the pipe member is also adjusted by cutting away the first base end of the member. In this case, since the first joint portion is on the distal end side of the sleeve member, the length of the pipe member can be adjusted without cutting the first joint portion.

  According to the endoscope and the coil fixing device for an endoscope of the present invention, it is possible to improve durability and repairability of the operation wire inside the operation unit.

Overall configuration diagram of an endoscope to which the bending portion of the embodiment is applied The principal part expansion perspective view of the front-end | tip hard part of the endoscope shown in FIG. The side view of the operation part which showed the internal structure of the operation part of the endoscope of FIG. The principal part perspective view which expanded and showed the coil fixing unit of FIG. The perspective view which showed a part of coil fixing unit of FIG. 5A is a side view of the coil fixing unit shown in FIG. 5, FIG. 5B is a sectional view of the coil fixing unit, and FIG. (A) is the perspective view which showed the conventional wire fixing part, (B) is a longitudinal cross-sectional view of a wire fixing part. (A) is a perspective view of a conventional wire fixing portion, (B) is a longitudinal sectional view of the wire fixing portion, and (C) is an enlarged sectional view of a main part of the support structure.

  Hereinafter, preferred embodiments of an endoscope and a coil fixing device for an endoscope according to the present invention will be described in detail with reference to the accompanying drawings.

[Overall configuration of endoscope 10]
FIG. 1 is an overall configuration diagram of an endoscope 10 according to an embodiment of the present invention.

  The endoscope 10 includes an operation unit 12 held by a practitioner, and an insertion unit 14 having a proximal end connected to the operation unit 12 and inserted into a subject. A base end portion of the universal cable 16 is connected to the operation portion 12, and a light guide connector 18 is provided at the distal end portion of the universal cable 16. The light guide connector 18 is connected to the light source device 20, whereby illumination light is sent from the light source device 20 to illumination windows 22 and 22 (see FIG. 2) described later. In addition, an electrical connector 26 is connected to the light guide connector 18 via a cable 24, and the electrical connector 26 is connected to the processor unit 28.

<Operation unit 12>
The operation unit 12 is provided with an air / water feed button 30, a suction button 32, and a shutter button 34 operated by a practitioner, and a pair of angle knobs 36 and 38 are provided coaxially. The operation unit 12 is provided with a forceps insertion unit 40.

<Insertion part 14>
The insertion portion 14 includes a flexible portion 42, a bending portion 44, and a distal end hard portion 46 from the proximal end portion of the operation portion 12 toward the distal end portion. That is, the insertion portion 14 includes a distal end hard portion 46, a bending portion 44, and a flexible portion 42 in order from the distal end side. The bending portion 44 is remotely bent by turning the angle knobs 36 and 38 of the operation unit 12. Thereby, the distal end hard portion 46 can be directed in a desired direction.

<Hard tip 46>
FIG. 2 is an enlarged perspective view of a main part of the distal end hard portion 46.

  The distal end surface 48 of the distal end rigid portion 46 is provided with an observation window 50, the illumination windows 22 and 22, the air / water supply nozzle 52, and the forceps port 54.

  An observation optical system and an image sensor (not shown) are disposed inside the distal end hard portion 46 and on the proximal end side of the observation window 50, and a signal cable (not shown) is connected to a substrate that supports the image sensor. Is done. The signal cable is inserted into the insertion portion 14, the operation portion 12, the universal cable 16, and the cable 24 of FIG. 1, extends to the electrical connector 26, and is connected to the processor unit 28. The observation image captured from the observation window 50 in FIG. 2 is formed on the light receiving surface of the image sensor via the observation optical system, converted into an electrical signal by the image sensor, and then sent to the processor unit 28 via the signal cable. It is output and converted into a video signal. As a result, an observation image is displayed on the monitor 56 connected to the processor unit 28. As the image sensor, a CCD (Charge Coupled Device) type image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor can be used.

  An emission end of an optical fiber (not shown) is disposed behind the illumination windows 22 and 22. This optical fiber is inserted through the insertion portion 14, the operation portion 12, and the universal cable 16 of FIG. 1 and extends to the light guide connector 18. Therefore, when the light guide connector 18 is connected to the light source device 20, the illumination light emitted from the light source device 20 is transmitted to the illumination windows 22 and 22 in FIG. Is irradiated.

  The air / water supply nozzle 52 communicates with an air / water supply valve (not shown) operated by the air / water supply button 30 in FIG. Further, the air / water supply valve is connected to a water supply connector 58 provided in the light guide connector 18 via a tube (not shown). An air / water supply means (not shown) is connected to the water supply connector 58, and air and water are supplied from the air / water supply means. Therefore, by operating the air / water supply button 30, air or water can be ejected from the air / water supply nozzle 52 of FIG. 2 toward the observation window 50.

  The forceps port 54 communicates with the forceps insertion portion 40 via a forceps channel (not shown) inserted through the insertion portion 14 of FIG. Therefore, by inserting various treatment tools such as forceps and a high-frequency knife from the forceps insertion portion 40, the treatment tool can be led out from the forceps port 54 of FIG. The forceps channel communicates with a suction valve (not shown) operated by the suction button 32 of FIG. 1, and this suction valve is connected to a suction connector 60 provided in the light guide connector 18 via a tube (not shown). Connected. Accordingly, by connecting a suction pump (not shown) to the suction connector 60 and operating the suction valve by the suction button 32, residues, dirt, and the like can be sucked from the forceps port 54 via the forceps channel.

<The coil fixing unit 64 and the coil fixing device of the close contact coil 72>
FIG. 3 is a side view of the operation unit 12 showing the internal structure of the operation unit 12. In particular, FIG. 3 shows a coil fixing unit 64 for fixing the proximal end 73 of the contact coil 72 inside the operation unit 12. The coil fixing unit 64 is provided inside the operation unit 12. The close contact coil 72 is a member that protects the operation wire 62 that bends the bending portion 44 (see FIG. 1), is disposed from the flexible portion 42 to the operation portion 12, and the operation wire 62 is inserted in a freely reciprocating manner. 4 is an enlarged perspective view of a main part of the coil fixing unit 64 shown in FIG.

  As shown in FIG. 3, a pulley 66 connected to a rotation shaft (not shown) of the angle knobs 36 and 38 is rotatably disposed inside the operation unit 12. The pulley 66 is provided for each angle knob 36 and angle knob 38. The pulley 66 is rotatably attached to a plate-like support member 68 (see FIG. 4) to which the coil fixing unit 64 is attached. That is, the pulley 66 and the coil fixing unit 64 are attached to a support member 68 that is the same member.

  As shown in FIG. 4, a total of four operation wires 62 are arranged in the operation unit 12, each of which includes two for bending in the vertical direction and for bending in the horizontal direction. These operation wires 62 are connected at their distal ends to the curved portion 44 or the distal end hard portion 46 in FIG. 1, and connected to the pulley 66 in FIG. 3 via a connector 69 and a short connection wire 70 at the proximal end. . That is, the operation wire 62 is disposed from the bending portion 44 or the distal end hard portion 46 to the operation portion 12. Further, the operation wire 62 is pushed and pulled by a pulling operation corresponding to the rotation operation of the pulley 66 which is an operation of the operation unit 12, whereby the bending portion 44 is bent in the vertical direction and the left-right direction.

  As shown in FIG. 4, the coil fixing unit 64 constituting the coil fixing device includes a pipe member 74 and a sleeve member 78.

  Inside the operation unit 12, the operation wire 62 is inserted and protected by the contact coil 72, and is inserted through the metal pipe member 74 together with the contact coil 72.

  FIG. 5 is a perspective view showing the coil fixing unit 64. 6A is a side view of the coil fixing unit 64 shown in FIG. 5, FIG. 6B is a cross-sectional view of the coil fixing unit 64, and FIG. 6C is an enlarged cross-sectional view of the main part of the coil fixing unit 64. It is. 4 to 6, the arrow A points to the proximal end side, and the arrow B points to the distal end side.

<< Pipe member 74 >>
The pipe member 74 has a first distal end 74A, a first proximal end 75, and a first longitudinal axis 74B, and the first coil 74 is inserted between the first distal end 74A and the first proximal end 75. One insertion path 74C is provided. The first insertion passage 74 </ b> C has a first length L <b> 1 in the direction of the first longitudinal axis 74 </ b> B, and is in close contact with the base end 73 of the close contact coil 72 positioned closer to the base end side than the first base end 75. The first joint 76 is joined to the coil 72.

  The proximal end 73 of the close contact coil 72 extends from the first proximal end 75 of the pipe member 74 to the proximal end side indicated by the arrow A in FIG. The number of turns will be described later.

  Further, the close contact coil 72 and the pipe member 74 are the first joining portion 76 and are joined by spot welding with laser light as joining means at a position closer to the distal end side than the second distal end 78A of the sleeve member 78. Has been. That is, the 1st junction part 76 is a welding part. The first joint portion 76 is provided at a plurality of locations in the axial direction and the circumferential direction of the pipe member 74 on the distal end side of the pipe member 74, whereby the distal end side inner circumferential surface which is the first joint surface of the pipe member 74. Is directly joined to the contact coil 72.

  In addition, you may select the form which joins the contact | adherence coil 72 and the pipe member 74 directly in any one of ultrasonic welding, resistance welding, and caulking instead of laser welding. Even in the case of joining by ultrasonic welding, resistance welding, and caulking, it is preferable to carry out at the distal end side of the pipe member 74.

  The base end side of the pipe member 74 is inserted through the metal sleeve member 78, and the first base end 75 of the pipe member 74 extends from the second base end 79 of the sleeve member 78 to the base end side indicated by the arrow A. A predetermined amount is extended. The proximal end side of the pipe member 74 inserted into the sleeve member 78 is fixed to the sleeve member 78 with solder.

<< Sleeve member 78 >>
The sleeve member 78 has a second distal end 78A, a second proximal end 79, and a second longitudinal axis 78B parallel to the first longitudinal axis 74B, and between the second distal end 78A and the second proximal end 79. A second insertion passage 78C through which the pipe member 74 is inserted is provided. The second insertion passage 78C has a second length L2 that is shorter than the first length L1 in the direction of the second longitudinal axis 78B. The sleeve member 78 has a second joint portion that is joined to the pipe member 74 in a state where the second base end 79 is disposed on the distal end side of the first base end 75 of the pipe member 74, and the operation portion 12. 78D to be fixed. The second joint portion is an inner peripheral surface of the second insertion passage 78C.

  The second tip 78A of the sleeve member 78 is configured as a large diameter cylindrical portion. At the opening end of the second tip 78A, as shown in FIG. 6C, an injection port 80 whose diameter is increased in a tapered shape toward the tip is formed. From the gap between the injection port 80 and the pipe member 74, Solder that is a bonding agent is injected into the second insertion passage 78C. The solder injection is stopped when the solder leaks from the open end of the second base end 79 of the sleeve member 78. Then, when the injected solder is solidified, the pipe member 74 and the sleeve member 78 are joined by the solder. That is, the inner peripheral surface which is the second joint surface of the sleeve member 78 is joined to the outer peripheral surface of the pipe member 74 via the solder which is a bonding agent.

  The position of the injection port 80 is not limited to the opening end of the second tip 78A, and may be provided at an arbitrary position of the sleeve member 78. The solidified solder is melted and removed when the coil fixing unit 64 is repaired. Thereby, the pipe member 74 can be easily separated from the sleeve member 78. Therefore, the length adjustment work of the close contact coil 72 performed with the pipe member 74 can be easily performed. In addition, solder is exemplified as the bonding agent, but the bonding agent is not limited to this, and the bonding agent may be indirectly bonded using any one of wax, adhesive, thermosetting resin, and ultraviolet curable resin. May be.

  The sleeve member 78 includes a fixed portion 78D including a pair of flanges 82 and 82 spaced apart from each other at an intermediate portion in the axial direction. The fixed portion 78D is fixed to a pedestal portion 84 fixed to the support member 68 of the operation portion 12 as shown in FIG. The pedestal portion 84 is detachably fixed to the support member 68 by a fastening member (not shown) such as a bolt. Thereby, the base end side including the base end 73 of the close contact coil 72 is fixed to the pedestal portion 84 via the pipe member 74 and the sleeve member 78 constituting the coil fixing unit 64.

<< pedestal part 84 >>
The pedestal portion 84 is composed of three divided members 84A, 84B, and 84C of an upper stage, a middle stage, and a lower stage that detachably engage and hold the four sleeve members 78. Two sleeve members 78 are engaged and held by the upper divided member 84A and the middle divided member 84B, and the remaining two sleeve members 78 are engaged and held by the middle divided member 84B and the lower divided member 84C. Is done. The divided members 84A, 84B, and 84C are stacked vertically as shown in FIG. 4, and then detachably attached to the support member 68 by a fastening member (not shown) that penetrates the divided members 84A, 84B, and 84C.

<Procedure for Fixing Adhesive Coil 72 to Support Member 68>
When the close contact coil 72 extending from the proximal end portion of the insertion portion 14 to the proximal end side is supported by the support member 68 of the operation portion 12, first, the proximal end 73 of the close contact coil 72 is connected to the second end of the pipe member 74. The base end 73 of the close contact coil 72 is projected from the first base end 75 of the pipe member 74 to the base end side by a predetermined length.

  When the protruding length is defined as the coil protruding amount, the coil protruding amount is set to a length corresponding to the number of turns of the close contact coil 72 of not less than 0.5 and not more than 2.

  Next, the contact coil 72 and the pipe member 74 are fixed by spot welding with a laser. The position of the first joint 76 is the tip side of the pipe member 74 and is located on the tip side of the second tip 78A as viewed from the sleeve member 78. Thereby, the length adjusting operation of the contact coil 72 performed with the pipe member 74 can be performed on the first base end 75 side of the pipe member 74 and on the base end 73 side of the contact coil 72.

  Next, the pipe member 74 is inserted into the sleeve member 78, and the first base end 75 of the pipe member 74 is extended from the second base end 79 of the sleeve member 78 by a predetermined amount.

  Next, solder is injected from the gap between the injection port 80 and the pipe member 74, and the solder injection is stopped when the solder leaks from the opening of the second base end 79 of the sleeve member 78. Thereafter, the injected solder is solidified, so that the pipe member 74 and the sleeve member 78 are joined.

  Next, each sleeve member 78 is engaged and held with the divided members 84A, 84B, 84C of the pedestal portion 84. Thereafter, the base portion 84 is fixed to the support member 68 by a fastening member (not shown).

  With the above operation, the contact coil 72 can be fixed to the support member 68.

<Repair procedure for adjusting the length of the contact coil 72>
First, the fastening member is loosened, the pedestal portion 84 is removed from the support member 68, and the sleeve members 78 are removed from the divided members 84A, 84B, 84C.

  Next, the sleeve member 78 is heated to melt and remove the solder joining the sleeve member 78 and the pipe member 74.

  Next, the rejoining position of the pipe member 74 with respect to the sleeve member 78 is shifted to the proximal end side with respect to the previous joining position, and the length of the contact coil 72 is adjusted. At this time, when the extension length of the first base end 75 of the pipe member 74 from the second base end 79 of the sleeve member 78 is long, the first base end 75 of the pipe member 74 is cut away to form the pipe member 74. Adjust the length. In this case, since the 1st junction part 76 exists in the front end side of the pipe member 74, the length of the pipe member 74 can be adjusted, without excising the 1st junction part 76. FIG.

  Next, solder is injected from the gap between the injection port 80 and the pipe member 74, and the pipe member 74 and the sleeve member 78 are fixed together at the rejoining position.

  Next, each sleeve member 78 is engaged and held with the divided members 84A, 84B, 84C of the pedestal portion 84, and the pedestal portion 84 is fixed to the support member 68 by a fastening member (not shown).

  With the above operation, the length of the contact coil 72 in the operation unit 12 can be easily adjusted.

[Characteristics of the coil fixing unit 64]
A) A feature is that the proximal end side of the close contact coil 72 is fixed to the inside of the operation unit 12 via a pedestal 84 by a pipe member 74 and a sleeve member 78 constituting the coil fixing unit 64.

  That is, the base end 73 of the close contact coil 72 is inserted into the first insertion passage 74 </ b> C of the pipe member 74, and the base end 73 of the close contact coil 72 is disposed closer to the base end side than the first base end 75 of the pipe member 74. Then, the pipe member 74 is joined to the contact coil 72.

  Accordingly, even when the operation wire 62 inserted through the close contact coil 72 is loosened, it is possible to reliably prevent the operation wire 62 from being rubbed and worn against the first base end 75 of the pipe member 74. That is, although the operation wire 62 contacts the base end 73 of the close contact coil 72, since the surface of the base end 73 is a smooth circular surface, wear of the operation wire 62 can be prevented.

  Moreover, according to the said characteristic, the repair which adjusts the length of the close_contact | adherence coil 72 performed inside the operation part 12 becomes easy. That is, the length of the contact coil 72 can be easily adjusted simply by removing the pipe member 74 from the sleeve member 78 and shifting the rejoining position of the pipe member 74 relative to the sleeve member 78 to the proximal end side with respect to the previous joining position. can do.

  B) It is characterized by having a joining means and a joining agent.

  That is, the first joining portion 76 joins the close coil 72 and the pipe member 74 with a joining means, and the joining means may be a direct joining form such as welding or caulking, ultrasonic welding, resistance welding, or the like. preferable.

  The second joint portion joins the pipe member 74 and the sleeve member 78 with a joining agent, and the joining agent uses any one of solder, brazing, an adhesive, a thermosetting resin, and an ultraviolet curable resin. It is preferable that the indirect bonding form be used.

  That is, the joining means joins the close contact coil 72 and the pipe member 74 by welding or caulking that is difficult to separate, ultrasonic welding, or resistance welding at the first joining portion.

  As the bonding agent, the pipe member 74 to which the close contact coil 72 is bonded and the sleeve member 78 into which the pipe member 74 is inserted are easily separated at the second bonding portion by solder, brazing, adhesive, thermosetting resin, Joining with any of the UV curable resins.

  Thereby, since the bonding agent such as solder does not enter the inside of the close contact coil 72, the durability of the operation wire 62 can be improved. Moreover, since the pipe member 74 and the sleeve member 78 can be easily separated by dissolving the bonding agent at the time of repair, repair for adjusting the length of the contact coil is facilitated.

  C) The sleeve member 78 is provided with an injection port 80 for injecting the bonding agent into the second insertion passage 78C, and the injection port 80 is provided at the second tip 78A of the sleeve member 78.

  That is, by providing the injection port 80 in the sleeve member 78, the bonding agent can be easily injected from the injection port 80 into the second insertion passage 78C. Further, by providing the injection port 80 at the second tip 78A of the sleeve member 78, the bonding agent can be easily injected from the opening of the second tip 78A into the second insertion passage 78C.

  D) When the length by which the base end 73 of the close contact coil 72 protrudes from the first base end 75 of the pipe member 74 toward the base end is defined as the coil protrusion amount, the number of turns of the close contact coil 72 is 0.5 or more and 2 turns. It is characterized in that the coil protrusion amount is set to a length corresponding to the following.

  That is, if the number of turns of the contact coil 72 is 0.5 or more, the wear of the operation wire 62 can be reliably prevented. Further, since the number of turns is set to 2 or less, problems due to excessive coil protrusion amount, for example, the proximal end 73 of the protruding contact coil 72 comes into contact with other components inside the operation unit 12, and the operation wire 62. The problem of obstructing the operation can be solved.

  E) There is a feature in that the sleeve member 78 is arranged on the proximal end side with respect to the first joint portion 76. In other words, the first joining portion 76 is characterized by being positioned at a position closer to the distal end side than the second distal end 78A of the sleeve member 78.

  When the extension length of the first base end 75 of the pipe member 74 from the second base end 79 of the sleeve member 78 becomes longer during the repair for adjusting the length of the contact coil 72, the first base end 75. And the length of the pipe member 74 is adjusted. In this case, since the first joint portion 76 is on the tip side of the second tip 78A of the sleeve member 78, the length of the pipe member 74 can be adjusted without cutting the first joint portion 76.

  As described above, the coil fixing unit 64 of the endoscope 10 according to the embodiment has been described in detail. However, the present invention is not limited to the above examples, and various improvements and modifications can be made without departing from the gist of the present invention. Of course, you may also do.

  DESCRIPTION OF SYMBOLS 10 ... Endoscope, 12 ... Operation part, 14 ... Insertion part, 16 ... Universal cable, 18 ... Light guide connector, 20 ... Light source device, 22 ... Illumination window, 24 ... Cable, 26 ... Electric connector, 28 ... Processor unit , 30 ... Air / water feed button, 32 ... Suction button, 34 ... Shutter button, 36, 38 ... Angle knob, 40 ... Forceps insertion part, 42 ... Soft part, 44 ... Curved part, 46 ... Hard tip part, 48 ... Front end surface, 50 ... Observation window, 52 ... Air / water supply nozzle, 54 ... Forceps port, 56 ... Monitor, 58 ... Water supply connector, 60 ... Suction connector, 62 ... Operation wire, 64 ... Coil fixing unit, 66 ... Pulley, 68 ... support member, 69 ... connector, 70 ... connection wire, 72 ... close contact coil, 73 ... proximal end, 74 ... pipe member, 74A ... first distal end, 75 ... first proximal end, 76 ... first Junction, 78 ... sleeve member, 78A ... second proximal, 78D ... fixed portion, 79 ... second proximal, 80 ... inlet, 82 ... flange, 84 ... base portion, 84A, 84B, 84C ... dividing member

Claims (9)

An insertion portion having a distal end hard portion, a bending portion, and a soft portion in order from the distal end side;
An operation unit connected to a base end of the insertion unit;
An operation wire that is arranged from the bending portion or the distal end hard portion to the operation portion and is bent by the operation of the operation portion;
A close contact coil that is arranged from the flexible portion to the operation portion, and through which the operation wire is inserted so as to freely advance and retract;
A coil fixing unit that is provided inside the operation portion and fixes a proximal end portion of the contact coil;
A pedestal part that is provided inside the operation part and attaches the coil fixing unit to the operation part,
The coil fixing unit is
A pipe member having a first tip, a first base end, and a first longitudinal axis, wherein a first insertion passage through which the adhesion coil is inserted between the first tip and the first base end The first insertion path has a first length in the direction of the first longitudinal axis, and the close contact is in a state where the proximal end of the contact coil is disposed closer to the proximal end than the first proximal end. A pipe member having a first joint joined to the coil;
A sleeve member having a second distal end, a second proximal end, and a second longitudinal axis parallel to the first longitudinal axis, wherein the pipe member is between the second distal end and the second proximal end. A second insertion passage is provided, the second insertion passage having a second length shorter than the first length in the direction of the second longitudinal axis, and the second base end of the pipe member. A sleeve member having a second joint portion that is joined to the pipe member in a state of being disposed on the distal end side relative to the first base end, and a fixed portion that is secured to the pedestal portion;
Endoscope with.   The pipe member has a first joint surface that joins directly to the tight coil, and the sleeve member has a second joint surface that joins the pipe member indirectly through a bonding agent. The endoscope according to 1.   The endoscope according to claim 2, wherein a joining means for joining the pipe member and the contact coil is welding or caulking.   The endoscope according to claim 2 or 3, wherein the bonding agent is any one of solder, brazing, an adhesive, a thermosetting resin, and an ultraviolet curable resin.   The endoscope according to any one of claims 2 to 4, wherein the sleeve member has an injection port for injecting the bonding agent into the second insertion passage.   The endoscope according to claim 5, wherein the injection port is provided at the second tip of the sleeve member.   When the length that the base end of the close contact coil protrudes from the first base end to the base end side of the pipe member is defined as the coil protrusion amount, the coil protrusion amount is equal to or greater than 0.5 turns of the close contact coil. The endoscope according to any one of claims 1 to 6, which has a length corresponding to two or less turns.   The endoscope according to any one of claims 1 to 7, wherein the sleeve member is disposed on a proximal end side with respect to the first joint portion. An insertion portion having a distal end hard portion, a bending portion, and a flexible portion in order from the distal end side, an operation portion connected to a proximal end portion of the insertion portion, and the bending portion or the distal end hard portion to the operation portion. An operation wire that bends the bending portion by being pushed and pulled by an operation of the operation portion, and a contact coil that is disposed from the flexible portion to the operation portion and through which the operation wire is inserted so as to freely advance and retract. In an endoscope,
A coil fixing device for fixing the contact coil to the operation unit,
A coil fixing unit that is attached to a pedestal provided inside the operation unit and fixes a proximal end of the contact coil;
The coil fixing unit is
A pipe member having a first tip, a first base end, and a first longitudinal axis, wherein a first insertion passage through which the adhesion coil is inserted between the first tip and the first base end The first insertion path has a first length in the direction of the first longitudinal axis, and the close contact is in a state where the proximal end of the contact coil is disposed closer to the proximal end than the first proximal end. A pipe member having a first joint joined to the coil;
A sleeve member having a second distal end, a second proximal end, and a second longitudinal axis parallel to the first longitudinal axis, wherein the pipe member is between the second distal end and the second proximal end. A second insertion passage is provided, the second insertion passage having a second length shorter than the first length in the direction of the second longitudinal axis, and the second base end of the pipe member. A sleeve member having a second joint portion that is joined to the pipe member in a state of being disposed on the distal end side relative to the first base end, and a fixed portion that is secured to the pedestal portion;
A coil fixing device for an endoscope.

Images