Endoscopy

Abstract

Provided is an endoscope in which a wire traction member is prevented from rotating at a stage before use.　According to the present invention, an endoscope (10) comprises first and second angle knobs (51), (52) linked to first and second wire traction members (61), (62) for changing the direction of the tip (12a) of an insertion part (12). Until use, a rotation restriction member (50) is fitted instead of the first and second angle knobs (51), (52). The rotation restriction member (50) is provided with a first rotation restriction part (81) that engages with the first wire traction member (61) and restricts the first wire traction member (61) from rotating, and a second rotation restriction part (82) that engages with the second wire traction member (62) and restricts the second wire traction member (62) from rotating.

Description

[Technical Field]

[0001] The present invention relates to an endoscope. [Background technology]

[0002] Endoscopes for observing the inside of a subject's body are widely known. Endoscopes include an insertion section that is inserted into the subject's body and a control section that is connected to the proximal end of the insertion section. The control section includes a wire-pulling member that, when rotated, pulls a wire disposed inside the insertion section to change the orientation of the tip of the insertion section, and an angle knob that is connected to the wire-pulling member and transmits an operating force to the wire-pulling member. The orientation of the tip of the insertion section can be changed by rotating the angle knob.

[0003] As described in Patent Document 1 below, some endoscopes have angle knobs that are detachably attached to the control section. In such endoscopes, for example, the angle knob is shipped detached from the control section, and is attached to the control section when in use. By providing the angle knob in this detachable manner, it is possible, for example, to prepare multiple types of angle knobs with different outer diameters and allow the user to select which angle knob to attach and use. This allows the user to select the operating force required to bend the bending section depending on which angle knob is attached. Furthermore, Patent Document 2 below describes an attachment that can be placed over the angle knob. By placing an attachment over the angle knob in this way, it is possible to reduce the operating force required to bend the bending section. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 09-084754 [Patent Document 2] Utility Model Registration No. 3181928 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional endoscopes have had the problem that the insertion section bends during shipping or storage before use, causing the wire-pulling member to rotate.

[0006] The present invention has been made in view of the above background, and has as its object to provide an endoscope in which the wire-pulling member does not rotate before use. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the endoscope of the present invention comprises an insertion section that is inserted into the body of an object to be observed, a wire pulling member that pulls a wire arranged inside the insertion section as it is rotated, thereby changing the orientation of the tip of the insertion section, and an angle knob that is connected to the wire pulling member and transmits an operating force to the wire pulling member, and the angle knob is detached from the wire pulling member before use, and the endoscope is attached to the wire pulling member when in use, and further comprises a rotation restricting member that engages with the wire pulling member when the angle knob is detached from the wire pulling member to restrict the rotation of the wire pulling member and hold the wire pulling member in a predetermined rotational position.

[0008] The rotation restricting member may be removed during use and an angle knob may be attached instead.

[0009] The rotation restricting member may be provided so as to be movable between a rotation restricting position where it engages with the wire pulling member to restrict rotation of the wire pulling member, and a rotation allowing position where it disengages from the rotation restricting position and allows rotation of the wire pulling member, and may be pressed by the angle knob during the process of attaching the angle knob to the wire pulling member to move from the rotation restricting position to the rotation allowing position.

[0010] The wire-pulling member may be pressed by the rotation-restricting member in the process of attaching the rotation-restricting member and guided to a predetermined rotation position.

[0011] The wire may comprise a first wire that, when pulled, directs the tip of the insertion portion in a first direction, a second wire that, when pulled, directs the tip of the insertion portion in a second direction opposite to the first direction, a third wire that, when pulled, directs the tip of the insertion portion in a third direction perpendicular to the first direction, and a fourth wire that, when pulled, directs the tip of the insertion portion in a fourth direction opposite to the third direction; the wire pulling member may comprise a first wire pulling member connected to the first and second wires and selectively pulling one of the first and second wires in accordance with the direction of rotation, and a second wire pulling member connected to the third and fourth wires and selectively pulling one of the third and fourth wires in accordance with the direction of rotation; and the angle knob may comprise a first angle knob connected to the first wire pulling member and a second angle knob connected to the second wire pulling member.

[0012] The rotation restricting member may have a first rotation restricting portion that restricts the rotation of the first wire pulling member, and a second rotation restricting portion that restricts the rotation of the second wire pulling member, and when the restriction on the rotation of one of the first and second wire pulling members is released, the restriction on the rotation of the other wire pulling member is also released.

[0013] The rotation restricting member may comprise a first rotation restricting member that restricts the rotation of the first wire-pulling member, and a second rotation restricting member that restricts the rotation of the second wire-pulling member, and when the first angle knob is attached, the restriction on the rotation of the first wire-pulling member by the first rotation restricting member may be released, and when the second angle knob is attached, the restriction on the rotation of the second wire-pulling member by the second rotation restricting member may be released. [Effects of the Invention]

[0014] According to the present invention, an endoscope can be provided in which the wire-pulling member does not rotate before use. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is an external view of an endoscope. [Figure 2] FIG. 2 is an external view of a wire-pulling mechanism. [Figure 3] FIG. 2 is an exploded view of the wire-pulling mechanism. [Figure 4] FIG. 2 is an external view of a wire-pulling mechanism. [Figure 5] FIG. 2 is an exploded view of the wire-pulling mechanism. [Figure 6] 10 is an explanatory diagram of a mechanism for releasing the restriction on the rotation of the wire-pulling member during the process of attaching the angle knob. FIG. [Figure 7] 10 is an explanatory diagram of a mechanism for releasing the restriction on the rotation of the wire-pulling member during the process of attaching the angle knob. FIG. [Figure 8] 10 is an explanatory diagram of a mechanism for releasing the restriction on the rotation of the wire-pulling member during the process of attaching the angle knob. FIG. [Figure 9] 10 is an explanatory diagram of a mechanism for releasing the restriction on the rotation of the wire-pulling member during the process of attaching the angle knob. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] First Embodiment 1, an endoscope 10 includes an insertion section 12 that is inserted into the body of an observation subject. A tip 12a of the insertion section 12 is provided with an illumination window 14 that emits illumination light, an observation window 16 that receives reflected light from the observation subject, and a forceps outlet 20 that is an outlet for a treatment tool such as forceps that is inserted into the insertion section 12 from a forceps inlet 18.

[0017] A bending portion 30 is provided near the distal end 12a of the insertion portion 12. The bending portion 30 is provided so as to be bendable up, down, left, and right. Four wires, namely, first to fourth wires 31 to 34 (see FIGS. 2 and 3), arranged inside the insertion portion 12 are connected to the bending portion 30. The bending portion 30 is bent in a first direction (upward in this embodiment) by pulling the first wire 31 toward the proximal end of the insertion portion 12. The bending portion 30 is bent in a second direction (downward in this embodiment) by pulling the second wire 32 toward the proximal end of the insertion portion 12. The bending portion 30 is bent in a third direction (leftward in this embodiment) by pulling the third wire 33 toward the proximal end of the insertion portion 12. The bending portion 30 is bent in a fourth direction (rightward in this embodiment) by pulling the fourth wire 34 toward the proximal end of the insertion portion 12.

[0018] An operating section 40 is connected to the base end side of the insertion section 12. A rotation restricting member 50 is attached to the operating section 40 until the endoscope 10 is used, and when the endoscope 10 is used, the rotation restricting member 50 is removed and first and second angle knobs 51, 52 are attached instead. A wire pulling mechanism 60 is provided in the operating section 40, and the first and second angle knobs 51, 52 are attached instead. G The knobs 51 and 52 are attached to a wire pulling mechanism 60.

[0019] The wire-pulling mechanism 60 includes a first wire-pulling member 61 (see FIGS. 2 and 3) to which the first and second wires 31, 32 are connected, and the first angle knob 51 is attached to and connected to the first wire-pulling member 61. By rotating the first angle knob 51 in one direction (counterclockwise in this embodiment), the first wire 31 is pulled and the tip 12a of the insertion section 12 is directed upward, and by rotating it in the opposite direction (clockwise in this embodiment), the second wire 32 is pulled and the tip 12a of the insertion section 12 is directed downward.

[0020] The wire-pulling mechanism 60 also includes a second wire-pulling member 62 (see FIGS. 2 and 3) to which the third and fourth wires 33, 34 are connected, and the second angle knob 52 is attached to and connected to the second wire-pulling member 62. By rotating the second angle knob 52 in one direction (counterclockwise in this embodiment), the third wire 33 is pulled and the tip 12a of the insertion section 12 is turned leftward, and by rotating the second angle knob 52 in the opposite direction (clockwise in this embodiment), the fourth wire 34 is pulled and the tip 12a of the insertion section 12 is turned rightward.

[0021] 2 and 3, the wire-pulling mechanism 60 has the first and second wire-pulling members 61 and 62 housed in a cylindrical body 70 and supported so as to be rotatable about an axis CL. The cylindrical body 70 supports, from the outer periphery, a middle plate 71 on which the first wire-pulling member 61 is placed and a bottom plate 72 on which the second wire-pulling member 62 is placed. The first wire-pulling member 61 is formed in a cylindrical shape, and the second wire-pulling member 62 is formed in a shaft shape. The second wire-pulling member 62 penetrates the middle plate 71 and the first wire-pulling member 61, with its upper portion protruding above the cylindrical body 70.

[0022] The first wire 31 and the second wire 32 are attached to the lower outer periphery of the first wire-pulling member 61 at positions facing each other across the axis CL, and the first wire-pulling member 61 rotates counterclockwise around the axis CL. times By rotating counterclockwise, the first wire 31 is pulled, and by rotating clockwise, the second wire 32 is pulled.

[0023] A first engagement groove 61a and a first guide groove 61b are formed on the upper part of the first wire-pulling member 61. When the first angle knob 51 is attached to the operation unit 40, a first protrusion 51b of a first engagement ring 51a provided at the lower end of the first angle knob 51 engages with the first engagement groove 61a, connecting the first angle knob 51 and the first wire-pulling member. This causes the first angle knob 51 and the first wire-pulling member 61 to rotate together.

[0024] On the other hand, when the rotation restricting member 50 is attached to the operation unit 40, a protruding first rotation restricting portion 81 provided on the rotation restricting member 50 engages with the first engagement groove 61a. The rotation restricting member 50 is provided with a holder 80 that fits into the outer shell 40a (see FIG. 1) of the operation unit 40, and when the rotation restricting member 50 is attached to the operation unit 40, the holder 80 fits into the outer shell 40a, and the rotation restricting member 50 (first rotation restricting portion 81) is held in a predetermined position and posture. As a result, the rotation of the first wire-pulling member 61 is restricted by the first rotation restricting portion 81 engaged with the first engagement groove 61a, and the first wire-pulling member 61 is held in a predetermined rotation position.

[0025] The first guide groove 61b is a groove that is connected to the upper end side of the first engagement groove 61a and is formed so as to become wider as it extends upward. The first guide groove 61b has the function of guiding (rotating) the first wire-pulling member 61 to the predetermined rotation position (a position where the first engagement groove 61a engages with the first rotation restricting portion 81 when the rotation restricting member 50 is attached to the operation unit 40) during the process of attaching the rotation restricting member 50 to the operation unit 40. In other words, even if the first wire-pulling member 61 is in a rotation position different from the predetermined rotation position when attaching the rotation restricting member 50, the first rotation restricting portion 81 presses the side wall of the first guide groove 61b during the process of attaching the rotation restricting member 50, causing the first wire-pulling member 61 to rotate to the predetermined rotation position. This eliminates the need for the user to adjust the rotation position of the first wire-pulling member 61, which is convenient.

[0026] Similarly, the third wire 33 and the fourth wire 34 are attached to the lower outer periphery of the second wire-pulling member 62 at positions facing each other across the axis CL, and the second wire-pulling member 62 rotates counterclockwise around the axis CL. times By rotating counterclockwise, the third wire 33 is pulled, and by rotating clockwise, the fourth wire 34 is pulled.

[0027] A second engagement groove 62a and a second guide groove 62b are formed on the upper part of the second wire-pulling member 62. When the second angle knob 52 is attached to the operation unit 40, the second protrusion 52b of the second engagement ring 52a provided at the lower end of the second angle knob 52 engages with the second engagement groove 62a, connecting the second angle knob 52 and the second wire-pulling member 62. This allows the second angle knob 52 and the second wire-pulling member 62 to rotate together.

[0028] On the other hand, when the rotation restricting member 50 is attached to the operation unit 40, the protruding second rotation restricting portion 82 provided on the rotation restricting member 50 engages with the second engagement groove 62a. As described above, the rotation restricting member 50 is provided with the holder 80 that fits into the outer shell 40a of the operation unit 40, and when the rotation restricting member 50 is attached to the operation unit 40, the holder 80 fits into the outer shell 40a, and the rotation restricting member 50 (second rotation restricting portion 82) is held in a predetermined position and posture. As a result, the second rotation restricting portion 82 engaged with the second engagement groove 62a restricts the rotation of the second wire-pulling member 62, and the second wire-pulling member 62 is held in a predetermined rotation position.

[0029] The second guide groove 62b is a groove that is connected to the upper end side of the second engagement groove 62a and is formed so as to become wider as it extends upward. The second guide groove 62b has the function of guiding (rotating) the second wire-pulling member 62 to the predetermined rotation position (a position where the second engagement groove 62a engages with the second rotation restricting portion 82 when the rotation restricting member 50 is attached to the operation unit 40) during the process of attaching the rotation restricting member 50 to the operation unit 40. In other words, even if the second wire-pulling member 62 is in a rotation position different from the predetermined rotation position when attaching the rotation restricting member 50, the second rotation restricting portion 82 presses the side wall of the second guide groove 62b during the process of attaching the rotation restricting member 50, causing the second wire-pulling member 62 to rotate to the predetermined rotation position. This eliminates the need for the user to adjust the rotation position of the second wire-pulling member 62 when attaching the rotation restricting member 50, which is convenient.

[0030] In the above embodiment, an example has been described in which the wire-pulling member is rotated (guided) to a predetermined rotation position by grooves (first and second guide grooves 61b, 62b) that are formed to narrow downward (in the direction in which the rotation restricting member is attached to the endoscope) during the process of attaching the rotation restricting member, but the present invention is not limited to this. For example, a configuration may be adopted in which the groove width is constant and the width of the protrusion that engages with this groove is formed to narrow downward (in the direction in which the rotation restricting member is attached to the endoscope), so that the wire-pulling member is rotated (guided) to a predetermined rotation position during the process of attaching the rotation restricting member.

[0031] Furthermore, since the present invention is only required to include a rotation restricting member that restricts the rotation of the wire-pulling member when the angle knob is removed, the detailed configuration is not limited to the above embodiment and can be modified as appropriate. For example, in the above embodiment, an example has been described in which the rotation of the wire-pulling member is restricted by engaging a protrusion provided on the rotation restricting member with a groove provided on the wire-pulling member, but the rotation of the wire-pulling member may also be restricted by engaging a groove provided on the rotation restricting member with a protrusion provided on the wire-pulling member.

[0032] In the above embodiment, an example has been described in which the rotation of the first and second wire-pulling members 61, 62 is simultaneously restricted and released by attaching and detaching one rotation restricting member 50, but the present invention is not limited to this. Two rotation restricting members may be provided: a first rotation restricting member that restricts and releases the rotation of the first wire-pulling member 61, and a second rotation restricting member that restricts and releases the rotation of the second wire-pulling member 62, and the rotation of the first and second wire-pulling members 61, 62 may be restricted and released individually.

[0033] Second Embodiment In the first embodiment, the rotation restricting member 50 is configured to be detachable from the outer shell 40a of the operation unit 40, but in the second embodiment, the rotation restricting members (first and second rotation restricting members 121, 122 (see FIG. 5)) are built into the operation unit 40 (wire-pulling mechanism 100 (see FIGS. 4 and 5)). The second embodiment having such a configuration will be described below with reference to FIGS. 4 to 9. In the following description, like members to those in the first embodiment are denoted by like reference numerals, and description thereof will be omitted.

[0034] 4 and 5, the wire-pulling mechanism 100 of the second embodiment includes a cylindrical first wire-pulling member 101 placed on a middle plate 71 and rotatable about an axis CL. A first engagement groove 61a is provided on the upper part of the first wire-pulling member 101, and when a first angle knob 51 is attached to the first wire-pulling member 101, the first engagement groove 61a engages with a first protrusion 51b, connecting the first angle knob 51 and the first wire-pulling member 101. This causes the first angle knob 51 and the first wire-pulling member 101 to rotate together.

[0035] A first rotation restricting groove 111 is formed in the lower part of the first wire-pulling member 101. A first rotation restricting protrusion 121a provided on the first rotation restricting member 121 is engaged with the first rotation restricting groove 111. The first rotation restricting member 121 is supported so as to be slidable up and down by a first slide hole 131 that is long in the vertical direction and formed in the middle plate 71. The first rotation restricting member 121 moves between a rotation restricting position (see FIG. 6) where the rotation of the first wire-pulling member 101 is restricted by having an upper part protrude from the first slide hole 131 and engaging the first rotation restricting protrusion 121a with the first rotation restricting groove 111, and a rotation allowing position (see FIG. 7) where the first wire-pulling member 101 is housed inside the first slide hole 131 and the restriction on the rotation of the first wire-pulling member 101 is released (rotation is permitted).

[0036] A cylindrical first release member 141 is provided on the outer periphery of the first wire-pulling member 101 so as to be slidable in the direction of the axis CL (up and down direction). A first release protrusion 141a, which is inserted into the first rotation restricting groove 111, is provided on the lower end of the first release member 141.

[0037] 6, until the endoscope 10 is used, the first rotation restricting member 121 is set to the rotation restricting position, and the first rotation restricting protrusion 121a is engaged with the first rotation restricting groove 111. This restricts the rotation of the first wire-pulling member 101. Meanwhile, in this state, the first release protrusion 141a is disposed above the first rotation restricting protrusion 121a.

[0038] As shown in Fig. 7, when the first angle knob 51 is attached to the first wire-pulling member 101 during use of the endoscope 10, the first rotation restricting member 121 is pressed by the first engagement ring 51a and moves downward during this attachment process. This movement causes the first release protrusion 141a to press the first rotation restricting protrusion 121a, moving the first rotation restricting member 121 to the rotation-permitted position. This releases the restriction on the rotation of the first wire-pulling member 101. Thus, in the second embodiment, during the attachment process of the first angle knob 51, not only is the first angle knob 51 connected to the first wire-pulling member 101, but the restriction on the rotation of the first wire-pulling member 101 is also released at the same time.

[0039] 4 and 5, the wire-pulling mechanism 100 of the second embodiment includes a shaft-shaped second wire-pulling member 102 placed on the bottom plate 72 and rotatable about an axis CL. The second wire-pulling member 102 and a second release member 142 (described later) penetrate the middle plate 71, the first wire-pulling member 101, and the first release member 141, with their upper portions protruding above the cylindrical body 70. A second engagement groove 62a is provided on the upper portion of the second wire-pulling member 102, and a second angle knob 52 is provided to engage the second wire-pulling member 102. Material When the second angle knob 52 is attached to the second wire-pulling member 102, the second engagement groove 62a and the second protrusion 52b engage with each other, connecting the second angle knob 52 and the second wire-pulling member 102. This causes the second angle knob 52 and the second wire-pulling member 102 to rotate together.

[0040] A second rotation restricting groove 112 is formed in the lower part of the second wire-pulling member 102. A second rotation restricting protrusion 122a provided on the second rotation restricting member 122 is engaged with the second rotation restricting groove 112. The second rotation restricting member 122 is supported so as to be able to slide up and down by a second slide hole 132 that is long in the vertical direction and formed in the bottom plate 72. The second rotation restricting member 122 has an upper part that protrudes from the second slide hole 132, and the second rotation restricting protrusion 122a is engaged with the second rotation restricting groove 112. 1 2, the second wire-pulling member 102 moves between a rotation restriction position where the rotation of the second wire-pulling member 102 is restricted, and a rotation allowance position where the second wire-pulling member 102 is housed inside the second slide hole 132 and the restriction on the rotation of the second wire-pulling member 102 is released (rotation is allowed).

[0041] A cylindrical second release member 14 is attached to the outer periphery of the second wire-pulling member 102. 2 is provided so as to be slidable in the direction of the axis CL (up and down direction). A second release protrusion 142a, which is inserted into the second rotation restricting groove 112, is provided at the lower end of the second release member 142.

[0042] 8, until the endoscope 10 is used, the second rotation restricting member 122 is set to the rotation restricting position, and the second rotation restricting protrusion 122a is engaged with the second rotation restricting groove 112. This restricts the rotation of the second wire-pulling member 102. Meanwhile, in this state, the second release protrusion 142a is disposed above the second rotation restricting protrusion 122a.

[0043] As shown in Figure 9, when the second angle knob 52 is attached to the second wire-pulling member 102 during use of the endoscope 10, the second rotation restricting member 122 is pressed by the second engagement ring 52a and moves downward during this attachment process. This movement causes the second release protrusion 142a to press the second rotation restricting protrusion 122a, moving the second rotation restricting member 122 to the rotation-permitted position. This releases the restriction on the rotation of the second wire-pulling member 102. Thus, in the second embodiment, during the attachment process of the second angle knob 52, not only is the second angle knob 52 connected to the second wire-pulling member 102, but 2At the same time, the restriction on the rotation of the wire-pulling member 102 is released. [Explanation of symbols]

[0044] 10 Endoscopy 12 Insertion section 12a tip 14 Lighting window 16 Observation window 18 Forceps opening 20 Forceps exit 30 Curved section 31 First Wire 32 Second Wire 33 Third Wire 34 4th Wire 40 Control section 40a outer shell 50 Rotation restriction member 51 First angle knob 51a First engagement ring 51b 1st protrusion 52 Second angle knob 52a Second engagement ring 52b 2nd protrusion 60, 100 Wire pulling mechanism 61, 101 First wire pulling member 61a First engagement groove 61b First guide groove 62, 102 Second wire pulling member 62a Second engagement groove 62b Second guide groove 70 Cylinder 71 Middle Plate 72 Bottom plate 80 Holder 81 First rotation control part 82 Second rotation control part 111 First rotation restriction groove 112 Second rotation restriction groove 121 first rotation restricting member 121a First rotation restriction protrusion 122 second rotation restricting member 122a Second rotation restriction protrusion 131 First slide hole 132 Second slide hole 141 first release member 141a 1st release protrusion 142 second release member 142a 2nd release protrusion CL axis

Claims

1. an endoscope comprising an insertion section to be inserted into the body of an observation subject, a wire-pulling member that pulls a wire disposed in the insertion section as the insertion section is rotated to change the orientation of the tip of the insertion section, and an angle knob that is connected to the wire-pulling member and transmits an operating force to the wire-pulling member, wherein the angle knob is detached from the wire-pulling member before use and is attached to the wire-pulling member when in use; a rotation restricting member that engages with the wire-pulling member when the angle knob is detached from the wire-pulling member to restrict rotation of the wire-pulling member and hold the wire-pulling member at a predetermined rotation position.

2. 2. The endoscope according to claim 1, wherein the rotation restricting member is removed during use and the angle knob is attached instead.

3. 2. The endoscope according to claim 1, wherein the rotation restricting member is provided to be movable between a rotation restricting position where it engages with the wire pulling member to restrict rotation of the wire pulling member and a rotation allowing position where it releases the engagement to allow rotation of the wire pulling member, and is pressed by the angle knob in the process of attaching the angle knob to the wire pulling member to move from the rotation restricting position to the rotation allowing position.

4. 4. The endoscope according to claim 1, wherein the wire-pulling member is pressed by the rotation restricting member in the process of attaching the rotation restricting member and is guided to the predetermined rotation position.

5. the wires comprise a first wire that, when pulled, directs the tip of the insertion portion in a first direction; a second wire that, when pulled, directs the tip of the insertion portion in a second direction opposite to the first direction; a third wire that, when pulled, directs the tip of the insertion portion in a third direction perpendicular to the first direction; and a fourth wire that, when pulled, directs the tip of the insertion portion in a fourth direction opposite to the third direction; the wire-pulling members include a first wire-pulling member connected to the first and second wires and selectively pulling one of the first and second wires in accordance with the rotation direction, and a second wire-pulling member connected to the third and fourth wires and selectively pulling one of the third and fourth wires in accordance with the rotation direction, 5. The endoscope according to claim 1, wherein the angle knob comprises a first angle knob connected to the first wire-pulling member and a second angle knob connected to the second wire-pulling member.

6. the rotation restricting member includes a first rotation restricting portion that restricts rotation of the first wire-pulling member and a second rotation restricting portion that restricts rotation of the second wire-pulling member, The endoscope according to claim 5 , wherein when restriction on rotation of one of the first and second wire-pulling members is released, restriction on rotation of the other wire-pulling member is also released.

7. the rotation restricting member includes a first rotation restricting member that restricts rotation of the first wire-pulling member and a second rotation restricting member that restricts rotation of the second wire-pulling member, When the first angle knob is attached, the restriction on the rotation of the first wire-pulling member by the first rotation restricting member is released, The endoscope according to claim 5, wherein the restriction on the rotation of the second wire-pulling member by the second rotation restricting member is released when the second angle knob is attached.

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