Endoscope and operation handle of endoscope

Abstract

To provide an endoscope and an operation handle of an endoscope that allow an operation wire for operating a tip bent part of an endoscope insertion part to be fixed reliably and easily, and allow the endoscope insertion part to be operated accurately.SOLUTION: An operation handle of an endoscope includes an operation lever 30 for rotating a pulley 32 wound with an operation wire 15 and driving the operation wire, and a lever stopper 40 for stopping the rotation of the pulley by sliding with respect to the rotation center of the pulley. The operation lever includes a lever gear part fixed to the operation lever, which is disposed on the circumference centering the rotation center. The lever stopper includes a stopper gear part provided at the tip part in a sliding direction to the rotation center, which is engaged with the lever gear part and stops the rotation of the pulley.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an endoscope and an operation handle of the endoscope, and particularly to a disposable endoscope and an operation handle.

Background Art

[0002] Endoscopes are widely used for examinations and treatments as medical devices. Endoscopes are generally cleaned, sterilized, and reused repeatedly.

[0003] In recent years, with the emergence of new infectious diseases, the demand for disposable endoscopes has been increasing. Along with this, the development of a disposable endoscope that can accurately operate the insertion portion of the endoscope has been demanded.

[0004] For example, Patent Document 1 discloses the hand-held end of an endoscope, and Patent Document 2 discloses a small endoscope and a handpiece. In addition, Patent Document 3 discloses a bending portion control mechanism of an endoscope.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been made in view of the above points, and an object thereof is to provide an endoscope and an operation handle of the endoscope that can securely and easily fix an operation wire for operating the distal end bending portion of the endoscope insertion portion and can accurately operate the endoscope insertion portion.

Means for Solving the Problems

[0007] An endoscope operation handle according to one embodiment of the present invention is an endoscope operation handle having an insertion tube, an operation wire for operating the bending of the insertion tube, and a wire guide through which the operation wire is inserted, and an operation lever for driving the operation wire by rotating a pulley around which the operation wire is wound, and a lever stopper that slides with respect to the rotation center of the pulley to stop the rotation of the pulley, and the operation lever has a lever gear portion fixed to the operation lever and provided on a circumference centered on the rotation center, and the lever stopper is provided at a tip portion in the sliding direction toward the rotation center, and has a stopper gear portion that meshes with the lever gear portion to stop the rotation of the pulley.

[0008] An endoscope according to another embodiment of the present invention is the above operation handle, and a wire guide through which the operation wire is inserted, and the insertion tube through which the wire guide is inserted.

Brief Description of Drawings

[0009]

Figure 1A

Figure 1B

Figure 2A

Figure 2B

Figure 2C

Figure 3

Figure 4A

Figure 4B

Figure 5A

Figure 5B

Figure 5C

Figure 6

Figure 7A

Figure 7B

Figure 7C

Figure 8A

Figure 8B

Figure 8C

Figure 9A

Figure 9B

Figure 9C

Figure 10A

Figure 10B

Figure 10C

Embodiments for Carrying Out the Invention

[0010] In the following, preferred embodiments of the present invention will be described, but these may be appropriately modified or combined and applied. Also, in the following description and the accompanying drawings, substantially the same or equivalent parts will be denoted by the same reference numerals and described.

[0011] FIG. 1A is a view showing mainly the appearance of the operation handle 11 of the endoscope 10 according to one embodiment of the present invention. The endoscope 10 has an operation handle 11, a universal cord 12, and an insertion tube 13. Inside the insertion tube 13, an imaging device such as a CCD, electronic devices such as a light source device, a cable connected to the electronic device, an air / water supply channel, a treatment tool channel, an operation wire, and the like are provided.

[0012] FIG. 1B is a view showing the structure of the endoscope 10, and in particular, a view showing the internal structure of the operation handle 11. The endoscope 10 has an operation wire 15 for bending the bending portion 13A at the tip of the insertion tube 13, and a tubular wire guide 16 which is an outer guide of the operation wire 15. The wire guide 16 is, for example, a spring tube, and is an outer guide in which, for example, a stainless steel round wire is wound densely.

[0013] Note that the end of the insertion tube 13 is fixed inside the operation handle 11. The direction toward the center of the insertion tube 13 coaxial with the central axis of the end of the insertion tube 13 is defined as the x direction, the direction perpendicular to the x direction in the plane in which the operation wire 15 is stretched is defined as the y direction, and the direction perpendicular to the x direction and the y direction is defined as the z direction. Therefore, the yz plane is a plane perpendicular to the central axis of the insertion tube 13.

[0014] Figures 2A and 2B are diagrams showing the left and right side views of the endoscope 10. The operation handle 11 is formed by fitting the housing side plates 21A (right side) and 21B (left side) to form the housing 21. When the housing side plates 21A and 21B are not particularly distinguished, they are collectively referred to as the housing 21 for explanation.

[0015] As shown in FIGS. 1B, 2A, and 2B, inside the operation handle 11, the operation wire 15 is inserted into the wire guide 16, and the wire guide 16 is held by the wire guide holding portion 50. Also, the wire guide 16 is drawn out from the end of the insertion tube 13, and the end of the insertion tube 13 is held by the insertion tube holding portion 70.

[0016] The wire guide holding portion 50 has a guide holding member 51, and the insertion tube holding portion 70 has a tubing 71.

[0017] The operation handle 11 is provided with an operation lever 30 and a lever stopper 40 for fixing the operation lever 30. Also, the operation handle 11 is provided with a suction button 22, a remote switch 23 including a capture switch, etc., a forceps hole 24, and a suction port 25.

[0018] FIG. 2C is a perspective view schematically showing the internal structure of the operation handle 11. A treatment tool and air / water / suction tube 24A is connected to the forceps hole 24, and the treatment tool and air / water / suction tube 24A is connected to the insertion tube 13. A suction tube 22A is connected to the suction button 22, and the suction tube 22A is connected to the insertion tube 13 via the treatment tool and air / water / suction tube 24A.

[0019] The suction button 22 is configured as a valve assembly. The suction button 22 is connected to the suction port 25 by an intermediate tube 22B and functions to open and close the flow path between the suction tube 22A and the suction port 25.

[0020] The remote switch 23 is connected by a wiring 23A to a circuit board 27 including processors such as a video processor and a light source control unit. The circuit board 27 is connected by a wiring 23B to the universal code 12. The universal code 12 has a connector 12A at its tip for connecting to the video endoscope system.

[0021] 1. Operating Lever and Lever Stopper FIG. 3 is an exploded assembly view showing the structures of the operating lever 30 and the lever stopper 40. The operating lever 30 has a pair of lever members 31A and 31B, and a pulley 32 provided between the lever members 31A and 31B and fitted with the lever members 31A and 31B.

[0022] The operating wire 15 is wound around the pulley 32, and by rotating the pulley 32 around the central axis CZ by operating the operating lever 30 (see the arrow in FIG. 1B), the operating wire 15 is driven, and the curved portion 13A at the tip of the insertion tube 13 can be curved.

[0023] Also, inside the lever members 31A and 31B, a lever gear portion 33 having a substantially gear shape is provided on the circumference centered on the central axis CZ of the pulley 32. The lever gear portion 33 is fixed to the operating lever 30 and rotates around the central axis CZ by the rotation of the operating lever 30.

[0024] The lever stopper 40 has a gripping portion 40A and a slide portion 40B. The slide portion 40B is provided so as to slide (in the slide direction) toward the center of the lever gear portion 33. In the present embodiment, the slide portions 40B are provided on both sides of the housing 21, and the lever gear portions 33 corresponding to the slide portions 40B are also provided on both sides, but they may be provided on only one side.

[0025] At least one inner side of the slide portion 40B is provided with a slide rail 41 extending in the slide direction. The slide rail 41 is provided with a protrusion 41A.

[0026] At the tip of the slide portion 40B, a stopper gear portion 43 having a substantially gear shape that meshes with the lever gear portions 33 of the lever members 31A and 31B is provided. Further, on the side surface (the side of the pulley 32) of the stopper gear portion 43, a reinforcing plate 43A for reinforcing the strength of the stopper gear portion 43 is provided. More specifically, the stopper gear portion 43 has a plurality of teeth (in the case of the figure, three), and the reinforcing plate 43A is provided on the entire side surface of the plurality of teeth.

[0027] The plurality of teeth of the stopper gear portion 43 have a shape that allows the plurality of teeth to easily enter the tooth grooves of the lever gear portion 33 when the slide portion 40B meshes with the lever gear portion 33. For example, when the stopper gear portion 43 consists of three teeth, the two outer teeth are shorter than the central tooth, and are formed at an angle or in a shape corresponding to the angle of the teeth of the lever gear portion 33 at the time of fixation. Thereby, the lever gear portion 33 can be securely fixed.

[0028] Also, even when the teeth of the lever gear portion 33 and the stopper gear portion 43 are in opposing contact, it is preferable to use a material such as polyacetal with high slidability for the teeth so that the teeth slide and fit together.

[0029] An hourglass structure 45 (corrugated plate structure) having a groove with an arcuate cross-section extending in a direction perpendicular to the sliding direction is formed in the intermediate portion between the gripping portion 40A and the slide portion 40B. In the hourglass structure 45, the sliding operation during the operation of the lever stopper 40 can be made smooth and reliable. Also, since the arcuate portion bends, ease of fitting into the rail groove 21G (see FIGS. 5A and 5B) during assembly is ensured.

[0030] FIG. 4A schematically shows the position of the lever stopper 40 when the operation lever 30 is not fixed (OFF), and FIG. 4B schematically shows the position of the lever stopper 40 when the operation lever 30 is fixed (ON).

[0031] Figure 5A shows a state in which the protrusion 41A of the slide rail 41 and the recess 21E (the recess on the distal side from the stopper gear portion 43) of the rail groove 21G of the housing 21 are engaged. That is, the lever gear portion 33 and the stopper gear portion 43 are not engaged at all, indicating a state in which the operation lever 30 can rotate freely.

[0032] Further, Figure 5B shows a state in which the protrusion 41A and the recess 21F (the recess on the proximal side of the stopper gear portion 43) are engaged when fixed (ON). Therefore, a click feeling is generated when the slide portion 40B slides, and the operator can visually distinguish the ON / OFF state.

[0033] Furthermore, as shown in Figure 5C, triangular symbol marks 21M and 40M are provided on the surfaces of the housing 21 and the lever stopper 40, respectively. It is easy to visually distinguish whether the lever gear portion 33 and the stopper gear portion 43 are engaged or disengaged by the coincidence or non-coincidence of the tops of the symbol marks 21M and 40M.

[0034] 2. Wire Guide Holding Portion Figure 6 is a perspective view showing the wire guide holding portion 50. The wire guide holding portion 50 includes a guide holding member 51, a holding member receiver 53 for receiving the guide holding member 51, and a holding member presser 55 for pressing the guide holding member 51.

[0035] The holding member receiver 53 is provided upright and fixed to the housing side plate 21A, and the holding member presser 55 is provided upright on the housing side plate 21B. The guide holding member 51 is fitted and inserted into the holding member receiver 53 and is carried and fixed between the holding member receiver 53 and the holding member presser 55.

[0036] Figures 7A and 7B are perspective views of the guide holding member 51 when viewed from the pulley 32 side of the operation lever 30 and when viewed from the insertion tube holding portion 70 side, respectively. Further, FIG. 7C is a top view showing the case where the operation wire 15 and the wire guide 16 are inserted through the guide holding member 51.

[0037] The guide holding member 51 is responsible for positioning the wiring of the operation wire 15 and also for fixing the end portion of the wire guide 16 which is a spring tube. The guide holding member 51 has an insertion portion 56 through which the operation wire 15 and the wire guide 16 are inserted, and a flat plate-shaped fixing portion 58 that extends from the insertion portion 56 and is fitted and fixed to the holding member receiving portion 53. The fixing portion 58 has a flat plate shape perpendicular to the central axis direction (x direction) of the wire guide 16.

[0038] The flat plate-shaped fixing portion 58 has a tapered shape that becomes thinner toward the tip so that the guide holding member 51 does not shift in position. The holding member receiving portion 53 is provided with a recess 53A into which the tapered flat plate-shaped fixing portion 58 is fitted and fixed (see FIG. 8B).

[0039] Further, the fixing portion 58 is provided with a protruding portion 58A to improve the fitting strength of the tapered fixing portion 58 and also to prevent misassembly. Also, as shown in FIG. 7B, a rib 58B is provided to relieve the stress at the corner portion between the insertion portion 56 and the fixing portion 58.

[0040] The insertion portion 56 has a pressing surface 56A on the upper surface and a pair of through grooves 57 dug from the pressing surface 56A toward the holding member receiving portion 53. As shown in FIGS. 7A and 7C, in the region RA through which the operation wire 15 is inserted, a through groove 57A (first through groove) having a U-shaped cross section is formed. That is, the bottom of the U-shaped through groove 57A has a substantially semi-cylindrical shape having the same diameter as the groove width of the through groove 57A. The groove width of the through groove 57A is larger than that of the operation wire 15, and the operation wire 15 can be easily inserted from above the groove. Note that it is preferable that the groove width of the through groove 57A is smaller than the inner diameter of the wire guide 16 in terms of the durability of preventing disengagement.

[0041] Also, as shown in FIGS. 7B and 7C, in the region RB through which the wire guide 16 is inserted, a through groove 57B (second through groove) having a C-shaped cross section at the bottom is formed. That is, the through groove 57B has the same groove width as the through groove 57A except for the bottom, and the bottom (C-shaped portion) of the through groove 57B has a cylindrical shape with a diameter larger than the same groove width. Further, the C-shaped portion has a diameter into which the wire guide 16 is fitted and fixed.

[0042] Therefore, the diameter of the bottom of the U-shaped through groove 57A is smaller than the diameter of the bottom of the through groove 57B, and the upward movement (z direction) of the wire guide 16 is restricted. Also, since the width of the bottom of the through groove 57A is smaller than the diameter of the bottom of the through groove 57B, the end of the wire guide 16 abuts against the through groove 57B, and the movement of the wire guide 16 in the central axis direction (-x direction) is restricted.

[0043] FIG. 8A is a top view schematically showing a holding member presser portion 55 that abuts against the pressing surface 56A and presses the guide holding member 51. FIGS. 8B and 8C are cross-sectional views schematically showing cross-sections along line A-A and line B-B of FIG. 8A, respectively.

[0044] When the housing side plate 21B is fitted to the housing side plate 21A, the holding member presser portion 55 abuts against the pressing surface 56A and presses and holds the guide holding member 51 from above (FIGS. 8B and 8C), and also presses the guide holding member 51 from both sides in the central axis direction (x direction) of the wire guide 16, ensuring the fixation of the guide holding member 51.

[0045] 3. Insertion Tube Holding Portion FIG. 9A is a view showing the internal structure when the housing side plate 21B is removed, and particularly shows the periphery of the insertion tube holding portion 70. The insertion tube holding portion 70 has a tubing 71 into which the insertion tube 13 is inserted and a tubing receiver 76 to which the tubing 71 is fitted. Note that the insertion tube 13 and the tubing 71 are fixed using, for example, an adhesive.

[0046] FIG. 9B is a perspective view of the tube ring 71 as viewed from the guide holding member 51 side, and FIG. 9C is a perspective view of the tube ring 71 as viewed from the insertion tube 13 side. In FIG. 9C, the case of viewing the lower surface side of the tube ring 71 is shown.

[0047] As shown in FIGS. 9B and 9C, the tube ring 71 has a columnar hollow main body portion 72 having an inner diameter substantially the same as the outer diameter of the columnar insertion tube 13 and into which the insertion tube 13 can be inserted. Further, the tube ring 71 has a plurality of ribs.

[0048] More specifically, the tube ring 71 has plate-like ribs 73A and 73B (a plurality of first ribs) protruding in a plane (xy plane) parallel to the plane in which the wire guide 16 is stretched and including the central axis CX of the tube ring 71 (that is, the plane including the pulley groove of the pulley 32). The ribs 73A and 73B are provided on opposite sides of the tube ring 71. It is preferable that the ribs 73A and 73B have different sizes and / or lengths from each other.

[0049] The tube ring 71 has plate-like ribs 74A and 74B (a plurality of second ribs) protruding in a plane (yz plane) perpendicular to the central axis CX of the tube ring 71. That is, the ribs 74A and 74B are provided to extend in a plane orthogonal to the ribs 73A and 73B.

[0050] Further, the ribs 74A and 74B are separated by a gap GP that includes the central axis CX of the tube ring 71 and sandwiches a plane (xz plane) perpendicular to the plane in which the ribs 73A and 73B are formed.

[0051] The tube ring 71 also has a rib 75 (a third rib) provided at the top of the tube ring 71. Specifically, the rib 75 is formed as a plate-like rib protruding in a plane (xz plane) that includes the central axis CX of the tube ring 71 and is perpendicular to the plane in which the ribs 73A and 73B are formed.

[0052] Incidentally, as shown in FIG. 9C, it is preferable in terms of strength improvement that the ribs 74A and 74B are directly connected to the ribs 73A and 73B (portion W surrounded by a broken line in the figure).

[0053] FIGS. 10A to 10C are diagrams schematically showing a tubing receiver 76, a tubing 71, and a tubing retainer 78 when the housing side plates 21A and 21B are fitted together. In each figure, the tubing receiver 76 and the tubing retainer 78 are shown with hatching in cross section.

[0054] FIG. 10A shows the holding structure of the tubing 71 in a plane (yz plane) perpendicular to the central axis CX of the tubing 71. The ribs 73A and 73B of the tubing 71 are held and fixed by a tubing receiver 76 erected and fixed on the housing side plate 21A and a tubing retainer 78 erected and fixed on the housing side plate 21B.

[0055] More specifically, the tubing receiver 76 has a plurality of plate-like receiving portions 76A, and the tubing retainer 78 has a plurality of plate-like pressing portions 78A facing the receiving portions 76A. The ribs 73A and 73B of the tubing 71 are sandwiched between the receiving portions 76A and the pressing portions 78A.

[0056] Also, through the gap GP between the ribs 74A and 74B, the receiving portion 76B of the tubing receiver 76 abuts against the hollow main body portion 72 of the tubing 71, and the tubing 71 is held and fixed by the receiving portion 76B and the pressing portion 78B of the tubing retainer 78. Further, the pressing portion 78B sandwiches the rib 75 at the top of the tubing 71 from both sides to hold and fix the tubing 71.

[0057] Figure 10B shows the holding structure of the tubing 71 when viewed from above (yy plane). The ribs 73A and 73B of the tubing 71 are shorter than the length of the tubing 71, and both ends (x direction) of the tubing 71 are held and fixed by the L-shaped receiving parts 76A. Also, both tip ends of the ribs 73A and 73B of the tubing 71 are fixed from both sides (y direction) by the receiving parts 76B.

[0058] Figure 10C shows the holding structure of the tubing 71 when viewed from above (xy plane). It shows the holding structure of the tubing 71 in a plane (xz plane) perpendicular to the plane in which the central axis CX of the tubing 71 is included and the ribs 73A and 73B are formed.

[0059] Both end faces of the cylindrical tubing 71 are restricted in movement and fixed by the receiving parts 76A from both sides. Also, the two pressing parts 78B of the tubing retainer 78 fix the rib 75 from both sides in the direction of the central axis CX of the tubing 71. Further, the receiving part 76B abuts against the hollow main body part 72 through the gap GP between the ribs 74A and 74B, and the tubing 71 is held and fixed by the two pressing parts 78B and the receiving part 76B.

[0060] Therefore, the tubing 71 is surely fixed in three mutually orthogonal axial directions (x, y, z directions) by the tubing receiver 76 and the tubing retainer 78, and the wire guide 16 and the insertion tube 13 can be surely fixed even when a force is applied to the wire guide 16 and the insertion tube 13 during the operation of the operation wire 15. Therefore, when the insertion tube 13 and the tubing 71 are adhered to each other with the orientations of the camera (e.g., a CCD camera) provided at the tip of the tubing 71 and the insertion tube 13 aligned, the camera can always be arranged in the same orientation by using a specific rib (e.g., a rib having a specific shape different from others) among the ribs of the tubing 71 as a mark. That is, it becomes possible to align the orientations of the cameras at the tip. Thereby, an endoscope in which the orientation of the camera is the same with respect to the operation handle 11 can be provided for any product.

[0061] As described in detail above, according to the present invention, it is possible to securely and easily fix the operation wire for operating the tip bending portion of the endoscope insertion portion, and it is possible to provide an endoscope and an operation handle of the endoscope that can accurately operate the endoscope insertion portion.

Explanation of Reference Numerals

[0062] 10: Endoscope 11: Operation handle 13: Insertion tube 15: Operation wire 16: Wire guide 21: Housing 21G: Rail groove 30: Operation lever 31A, 31B: Lever members 32: Pulley 33: Lever gear portion 40: Lever stopper 40A: Gripping portion 40B: Slide portion 41: Slide rail 41A: Projection 43: Stopper gear portion 50: Wire guide holding portion 51: Guide holding member 53: Holding member receiving portion 55: Holding member pressing portion 56: Insertion portion 56A: Pressing surface 57A: First through groove 57B: Second through groove 58: Fixing portion 70: Insertion tube holding part 71: Tubing 73A, 73B: Multiple first ribs 74A, 74B: Multiple second ribs 75: Third rib 76: Tubing receiver 78: Tubing retainer

Claims

1. An operation handle of an endoscope having an insertion tube, an operation wire for operating the bending of the insertion tube, and a wire guide through which the operation wire is inserted, an operation lever for driving the operation wire by rotating a pulley around which the operation wire is wound, and a lever stopper that slides with respect to the rotation center of the pulley to stop the rotation of the pulley, wherein the operation lever has a lever gear portion fixed to the operation lever and provided on a circumference centered on the rotation center, the lever stopper is provided at a tip portion in a sliding direction toward the rotation center, and has a stopper gear portion that meshes with the lever gear portion to stop the rotation of the pulley, the operation handle of the endoscope.

2. The operation handle has a housing, wherein the housing of the operation handle and the stopper have, on one hand, a slide rail and, on the other hand, a rail groove fitted into the slide rail, the slide rail and the rail groove have protrusions and recesses that face each other at a position where the stopper gear portion meshes with the lever gear portion, the operation handle according to claim 1.

3. The operation lever has two lever stoppers arranged on both sides of the housing, and two lever gear portions that respectively mesh with the two lever stoppers, the operation handle according to claim 1.

4. The stopper gear portion has a plurality of teeth, and the lever stopper has a reinforcing plate provided on a side surface of the plurality of teeth, the operation handle according to claim 3.

5. Two lever stoppers arranged on both sides of the housing, and a gripping portion coupled to the two lever stoppers, wherein the gripping portion has a knurled structure portion between the two lever stoppers, the operation handle according to claim 1.

6. It has a wire guide holding portion capable of holding the wire guide at an end of the wire guide, the wire guide holding portion has a guide holding member, a holding member receiving portion fitted to the guide holding member, and a holding member pressing portion that presses the guide holding member against the holding member receiving portion to fix the guide holding member, the operation handle according to claim 1.

7. The guide holding member has a first through groove with a U-shaped cross section and a second through groove with a cylindrical shape having a C-shaped cross section at the bottom and a diameter of the bottom larger than the groove width of the first through groove. The operation handle according to claim 6, wherein the diameter of the cylindrical shape has a diameter into which the wire guide is fitted and fixed.

8. The guide holding member has a fixing portion in the shape of a tapered flat plate that becomes thinner toward the tip. The operation handle according to claim 6, wherein the holding member receiving portion has a recess into which the fixing portion is fitted and fixed.

9. It further has an insertion tube holding portion capable of holding the insertion tube. The insertion tube holding portion has a tubing into which the insertion tube can be inserted, a tubing receiver for fixing the tubing, and a tubing presser for sandwiching the tubing between the tubing receiver and fixing the tubing. The tubing A plurality of first rib-shaped plates provided on opposite sides of the tubing, protruding from the hollow main body portion in a plane including the central axis of the tubing and in which the wire guide is stretched. A plurality of second rib-shaped plates provided on opposite sides of the tubing, protruding from the hollow main body portion, in a plane orthogonal to the plane in which the plurality of first ribs are provided and perpendicular to the central axis. The operation handle according to claim 1.

10. The operation handle according to claim 9, wherein the plurality of first ribs are directly connected to the plurality of second ribs at the ends.

11. The operation handle according to claim 10, further having a third rib-shaped plate provided on the opposite side of the plurality of second ribs in a plane orthogonal to the plurality of first ribs and the plurality of second ribs and protruding from the hollow main body portion.

12. The operation handle according to claim 11, wherein the tubing receiver and the tubing presser have respective receiving portions and pressing portions for sandwiching and fixing the plurality of first ribs, the plurality of second ribs, and the third rib of the tubing.

13. An endoscope having the operation handle according to any one of claims 1 to 12, a wire guide through which the operation wire is inserted, and an insertion tube through which the wire guide is inserted.

Images