Endoscopy

Abstract

The present invention provides an endoscope in which the rotation range of a standing-base operation lever can be selected according to the preference of a user.　An endoscope according to the present invention includes a bending operation member attached to a body of an operation part; and a standing-base operation lever that changes the standing angle of a treatment-tool standing base for standing a treatment tool provided at the distal end of an insertion part. The standing-base operation lever has finger parts (35) having rotation restricting members (35a, 35b) inside. Contact between the rotation restricting members (35a, 35b) and an outer circumferential surface (41a) of the body of the operation part restricts the rotation of the standing-base operation lever.

Description

[Technical Field]

[0001] The present invention relates to an endoscope in which the rotation range of the elevator operating lever can be selected according to the user's preference. [Background technology]

[0002] Among endoscopes through which treatment tools can be inserted, there is known an endoscope in which a treatment tool stand provided at the tip of the insertion section is connected to a stand operation lever of the operation section, and the position of the stand is displaced by rotating the stand operation lever, thereby changing the protruding direction of the treatment tool.

[0003] The rotation mechanism linked to the stand-up platform control lever and the stand-up platform has a function to restrict rotation, thereby restricting the rotation range of the stand-up platform. For example, in Patent Document 1, a stopper is provided on a rotating drum connected to the stand-up platform control lever to restrict the rotation range of the stand-up platform. In addition, in Patent Document 2, a rotation restriction member that rotates on the same axis as the stand-up platform is provided to restrict the rotation range of the stand-up platform. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-67768 [Patent Document 2] International Publication No. 2018 / 079792 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the methods of the cited documents 1 and 2 only allow for the rotation to be restricted within a certain range, and there is a problem in that the rotation range of the stand cannot be easily changed to suit the preferences of different users, for example, when using the endoscope.

[0006] The present invention has been made in view of the above circumstances, and has as its object to provide an endoscope in which the rotation range of the elevator operating lever can be selected according to the user's preference. [Means for solving the problem]

[0007] The present invention solves the above-mentioned problems, and provides an endoscope comprising a bending operation member attached to the main body of the operation section, and an erection table operation lever for varying the erection angle of a treatment instrument erection table for erecting a treatment instrument provided at the distal end of the insertion section, the erection table operation lever having a finger hook with a rotation restriction member provided on the inside, and rotation of the erection table operation lever is restricted by the rotation restriction member coming into contact with the outer circumferential surface of the main body of the operation section. The rotation restricting members protrude toward the outer peripheral surface on both sides in the width direction of the inner side of the finger hook portion.

[0008] It is preferable that the range of rotation of the treatment instrument elevator varies in accordance with the range of rotation of the elevator operating lever.

[0009] It is preferable that the range of rotation of the treatment instrument stand be changed by changing the position or shape of the rotation restricting member.

[0010] It is preferable that the range of rotation of the treatment instrument stand be changed by changing the height of the rotation restricting member in a direction perpendicular to the installation surface or the width in a direction horizontal to the installation surface.

[0011] It is preferable to provide a plurality of elevator operating levers with rotation restricting members having different positions or shapes, and to change the range of rotation of the treatment instrument elevator by replacing the elevator operating levers.

[0012] It is preferable that the finger hook portion can be attached and detached when the curved operating member and the stand operating lever are attached to the main body of the operating unit, and that the range of rotation of the treatment instrument stand can be changed by replacing the rotation restricting member with a finger hook portion having a different position or shape. [Effects of the Invention]

[0013] According to the present invention, an endoscope can be provided in which the rotation range of the elevator operating lever can be selected according to the user's preference. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an overall view of an endoscope according to the present invention; [Figure 2] FIG. 2 is an enlarged plan view of an operation unit of the endoscope. [Figure 3] FIG. 10 is a perspective view illustrating the rotation range of the stand. [Figure 4] FIG. 10 is a schematic diagram illustrating a platform rotation mechanism. [Figure 5] FIG. 2 is an exploded view illustrating an operation member attached to an operation section of the endoscope. [Figure 6] FIG. 10 is a perspective view illustrating a platform operating lever. [Figure 7] FIG. 10 is a schematic diagram illustrating the rotation range of the elevator operating lever. [Figure 8] 10 is a schematic diagram illustrating the rotation range of the elevator operating lever when the height of the rotation restricting member is changed. FIG. [Figure 9] FIG. 10 is a schematic diagram comparing the rotation ranges of elevator operating levers with different rotation ranges. [Figure 10] FIG. 10 is an explanatory diagram comparing a plurality of different rotation ranges of the stand when using a stand operation lever with different rotation ranges. [Figure 11] 10A and 10B are schematic diagrams illustrating the rotation range of the elevator operating lever when the width of the rotation restricting member is changed. [Figure 12] FIG. 10 is an explanatory diagram of a stand operation lever with a detachable finger hook. DETAILED DESCRIPTION OF THE INVENTION

[0015] [First embodiment] 1, an endoscope 10 has a gripping section 11 that is gripped by a user, an operation section 12 for performing various operations, an insertion section 13 that is inserted into a subject, and a universal cord 14 that is connected to a connection section 15. An illumination device (not shown) that supplies illumination light to the endoscope 10 and a processor device (not shown) that executes various processes in response to operations of the operation section 12 are connected to the endoscope 10 via the universal cord 14. The insertion section 13 is connected in order from the distal end to the proximal end to a distal end section 13a, a bending section 13b, and a flexible section 13c.

[0016] The endoscope 10 is a side-viewing endoscope such as a duodenoscope, and is provided with a treatment tool insertion port 17 for inserting a treatment tool 18 used for performing medical procedures such as treatment or examination. The inserted treatment tool 18 passes through an insertion path disposed inside the insertion section 13 from the treatment tool insertion port 17 to the tip end 13a, protrudes from the tip end 13a, and is used for various medical procedures.

[0017] As shown in FIG. 2, the operation unit 12 includes, as bending operation members, an up / down angle knob 21 for bending the bending portion 13b in the up / down direction, a left / right angle knob 22 for bending the bending portion 13b in the left / right direction, and an up / down lock lever 23 and a left / right lock knob 24 for locking or unlocking the rotation of the angle knobs by rotating them. By rotating the up / down and left / right angle knobs, the bending portion 13b is bent and the distal end portion 13a is directed in the desired direction. To maintain the bending state of the bending portion 13b, the up / down lock lever 23 and the left / right lock knob 24 are rotated as appropriate. The outer peripheral surface 41a of the main body 41 of the operation unit 12 is provided with a plurality of operation buttons 25 for executing various endoscope processes in cooperation with the processor device. In FIG. 2, the direction indicated by the arrow x is the longitudinal direction of the operation unit 12, and the direction indicated by the arrow y is the width direction of the operation unit 12. That is, the longitudinal direction is the direction that corresponds to the up and down direction when a user normally grips the endoscope 10, and the width direction is the direction perpendicular to the longitudinal direction. Furthermore, in this specification, unless otherwise specified, the upward direction refers to the direction toward the bending operation member side of the main body 41 (from the back side to the front side in FIG. 2), and the opposite direction refers to the downward direction.

[0018] The operation unit 12 is also provided with a stand operation lever 31. The stand operation lever 31 is connected to a treatment tool stand 32 (hereinafter simply referred to as the stand) provided at the distal end 13a shown in Fig. 3 by a traction wire 47 (see Fig. 4) inserted inside the endoscope 10, and by rotating the stand operation lever 31, a stand rotation mechanism 40 (described later) changes the stand 32 from a lying position to an upright position, or from an upright position to a lying position. When performing various medical procedures, the treatment tool 18 protrudes from the distal end 13a along the guide surface 32a of the stand 32, and the protruding direction changes according to the change in the position of the stand 32.

[0019] FIG. 4 is a schematic diagram illustrating the platform rotation mechanism 40. The platform rotation mechanism 40 includes a rotating member 42, a crank member 45 connected to the rotating member 42, and a slider 46 connected to the crank member 45. The slider 46 is connected to the platform rotation lever 33, which rotates the platform 32, by a pulling wire 47. The crank member 45 converts the rotational motion of the rotating member 42 into the linear motion of the slider 46. The platform is also connected to the platform operating lever 31 so that the angle of the platform 32 changes as the platform operating lever 31 rotates. Therefore, when the platform operating lever 31 is connected to the rotating member 42, rotating the platform operating lever 31 pushes and pulls the pulling wire 47 connected to the rotating member 42, and the position of the platform 32 changes in accordance with the rotation of the platform operating lever 31. For example, as shown in Figure 4, when the stand operation lever 31 is rotated counterclockwise (rotation direction R) as indicated by the arrow, the traction wire 47 is pulled and the stand 32 rotates toward the standing posture. The rotation range of the stand operation lever 31 corresponds to the rotation range of the stand 32, and the rotation ranges of the stand operation lever 31 and the stand 32 are configured to rotate within a predetermined rotation range using known technology. Note that the stand rotation mechanism 40 can also omit the stand rotation lever 33 and directly connect the traction wire 47 and the stand 32.

[0020] As shown in FIG. 5 , the bending operation members and the elevator operation lever 31 are attached to the main body 41 of the operation unit 12 in the following order from the outside: the left-right lock knob 24, the left-right angle knob 22, the up-down angle knob 21, the up-down lock lever 23, and the elevator operation lever 31, stacked on top of each other around the same rotation shaft 51. When attaching, the elevator operation lever 31 is attached first so that the attachment portions (not shown) provided at the center of each bending operation member and the elevator operation lever 31 are inserted into the rotation shaft 51, followed by the up-down lock lever 23, the up-down angle knob 21, the left-right angle knob 22, and the left-right lock knob 24 in that order. When attached to the main body 41, these members rotate independently. It is preferable that the bending operation members and the elevator operation lever 31 are detachable from the main body 41.

[0021] As shown in FIG. 6, the stand operating lever 31 comprises an annular connecting portion 34a and an L-shaped arm portion 34b (see FIG. 6) connected to the connecting portion 34a. 12 The stand-up platform operating lever 31 is made up of an attachment member 34 formed of a metal plate (see FIG. 7) and a finger hook 35. The finger hook 35 is fixed to the arm 34b of the attachment member 34 by a screw (not shown) or the like. Rotation restricting members 35a and 35b are provided on both sides of the inside of the finger hook 35 in the width direction. When the stand-up platform operating lever 31 is attached to the main body 41 and the stand-up platform operating lever 31 is rotated, the rotation restricting member 35a abuts against the outer peripheral surface 41a (see FIG. 5) of the main body 41 at the rotation starting end or rotation terminal end (see FIG. 7), thereby restricting the rotation range of the stand-up platform operating lever 31.

[0022] FIG. 7 is a schematic diagram illustrating the rotation range of the stand operating lever 31 having rotation restriction members 35a, 35b of height H1. When the stand operating lever 31 is rotated along the outer circumferential surface 41a of the main body 41, the finger hook 35 appears to rotate along the outer circumferential surface 41a of the main body 41. The height of the rotation restriction members 35a, 35b refers to the dimension in the direction perpendicular to the installation surface when the rotation restriction members 35a, 35b are attached to the finger hook 35. The stand operating lever 31 rotates around the rotation axis 51. Rotation direction R7. The angle θ is defined as the angle between a straight line passing through the pivot axis 51 in the longitudinal direction, indicated by a dashed line, and the center line of the elevator control lever 31, indicated by a dot-dash line, and the angle θ will be described with appropriate subscripts. As shown in FIG. 7, when the elevator control lever 31 attached to the main body 41 is rotated, when the elevator control lever 31 is at a rotation start position R1 on the rotation start side, the rotation restricting member 35a provided on the rotation start side relative to the main body 41 abuts against the outer circumferential surface 41a of the main body 41, and when the elevator control lever 31 is at a rotation end position R2 on the rotation end side, the rotation restricting member 35b provided on the rotation end terminal side relative to the main body 41 abuts against the outer circumferential surface 41a of the main body 41. In other words, if the angle θ when the rotation restricting member 35a abuts against the outer peripheral surface 41a at the rotation starting end of the main body 41 is defined as θ1, and the angle θ when it abuts against the outer peripheral surface 41a at the rotation terminal end is defined as θ2, the stand operating lever 31 will rotate within the range from angle θ1 to angle θ2.

[0023] When the rotation range of the stand operation lever 31 is restricted, the rotation range of the stand 32 is also restricted. As shown in Figures 2 and 7, when the stand operation lever 31 is at the rotation start position R1 at angle θ1, the stand 32 is in a most reclined position at the minimum angle θ of angle θ1a, and when the stand operation lever 31 is at the rotation end position R2 at angle θ2, the stand 32 is in a most upright position at the maximum angle θ of angle θ2a.

[0024] The endoscope 10 has a rotation restricting member 35a 、35bThe stand-up platform control lever 31 has a plurality of stand-up platform control levers 31 with different positions or shapes, and by replacing the stand-up platform control lever 31 with another stand-up platform control lever 31, the rotation range of the stand-up platform control lever 31 can be easily restricted, allowing the rotation range of the stand-up platform 32 to be selected according to the user's preference and the content of the medical procedure. As shown in FIG. 8, the rotation restriction member 35b at the rotation terminal end side of the finger hook 35 of the stand-up platform control lever 31 is formed so that the height H2 along the direction facing the main body 41 is higher than the rotation restriction member 35b (height H1) in FIG. 7. Therefore, the stand-up platform control lever 31 in FIG. 8 abuts at a rotation terminal position R3 where the angle θ is θ3, which is smaller than the angle θ2 at the rotation terminal end side when the stand-up platform control lever 31 in FIG. 7 is installed, and therefore has a narrower rotation range than the stand-up platform control lever 31 in FIG. 7. Note that "the shapes of the rotation restricting members 35a, 35b are different" means that not only the heights are different as described above but also the widths are different, and that the cross-sectional shapes of the rotation restricting members 35a, 35b are different, such as triangular or rectangular, rather than round. In other words, when the elevator control lever 31 is replaced with another elevator control lever 31, the abutment surfaces of the rotation restricting members 35a, 35b of the finger hook 35 that abut against the outer surface 41a of the main body 41 should be different in the direction of rotation. Note that the width of the rotation restricting members 35a, 35b refers to the dimension in the horizontal direction relative to the installation surface when the rotation restricting members 35a, 35b are attached to the finger hook 35.

[0025] Figure 9 is an explanatory diagram comparing the rotation range of the stand-up platform operation lever 31 in Figure 7 with that of the stand-up platform operation lever 31 in Figure 8. It can be seen that the stand-up platform operation lever 31 in Figure 7 rotates within a range in which the angle θ is from θ1 to θ2, while the rotation range of the stand-up platform operation lever 31 in Figure 8 is narrower than the rotation range in Figure 7, and rotates within a range in which the angle θ is from θ1 to θ3.

[0026] In other words, if the stand-up platform operation lever 31 is replaced with another stand-up platform operation lever 31 having a different shape of the rotation restricting member 35a, the rotation range of the stand-up platform operation lever 31 changes, and thereby the rotation range of the stand-up platform 32 is also restricted. FIG. 10 shows the difference in the rotation range of the stand-up platform 32 between the stand-up platform operation lever 31 in FIG. 7 and the stand-up platform operation lever 31 in FIG. 8. Referring to FIG. 2, when the stand-up platform operation lever 31 is rotated from left to right in FIG. 2, the stand-up platform 32 rotates in the standing direction. Therefore, when the stand-up platform operation lever 31 in FIG. 8 is used, the maximum angle θ is shallower (θ3a<θ2a), and the rotation range is narrower than when the stand-up platform operation lever 31 in FIG. 7 is used. In this way, the user can adjust the rotation range according to their preferences and the content of the medical procedure. Origin The rotation range of the stand 32 of the stand operating lever 31 can be selected.

[0027] [Second embodiment] In the first embodiment, the heights of the rotation restriction members 35a and 35b of the stand-up platform control lever 31 are different. However, the widths of the rotation restriction members 35a and 35b may also be different. As shown in FIG. 11, the rotation restriction member 35a at the rotation start end has a width W1, while the rotation restriction member 35b at the rotation end end has a width W2 that is longer than the width W1. Therefore, the rotation end position R4 of the stand-up platform control lever 31 in FIG. 11 is closer to the rotation direction R than the rotation end position R2 of the stand-up platform control lever 31 in FIG. 7. Furthermore, at this time, the stand-up platform control lever 31 rotates within a range from angle θ1 to angle θ4. In this way, the rotation range of the stand-up platform control lever 31 can also be restricted by changing the widths of the rotation restriction members 35a and 35b instead of changing their heights.

[0028] [Third embodiment] In the elevator control lever 31 of the first and second embodiments, the mounting member 34 and the finger hook 35 are fixed with screws or the like, and when replacing the elevator control lever 31, it is necessary to remove the curved operation member such as the up / down angle knob 21 attached above the elevator control lever 31. However, in the elevator control lever 31 of the third embodiment, as shown in FIG. 12, the finger hook 35 is detachable from the mounting member 34. In the elevator control lever 31 of this embodiment, the mounting member 34 is provided with a fitting groove 36a and a T-shaped fitting protrusion 36b. Meanwhile, the finger hook 35 is provided with a fitting protrusion 37a that fits into the fitting groove 36a and a fitting recess 37b that fits into the fitting protrusion 36b. When attaching the finger hook 35 to the mounting member 34, first, the finger hook 35 is inserted radially inward so as to cover the mounting member 34, and then pushed downward (in the direction of the L-shaped bend) to fit it over. The finger hook 35 is not completely fixed as with a screw, but since the raising platform control lever 31 is normally pressed downward when rotating, no inconvenience occurs as long as the finger hook 35 is fixed to the mounting member 34 in the circumferential and radial directions in which the raising platform control lever 31 rotates. With this configuration, the finger hook 35 of the raising platform control lever 31 can be replaced without removing the curved operation member, allowing the user to easily replace the raising platform control lever 31 with one having a desired rotation range.

[0029] In the above-described embodiments, the finger hook 35 has a pair of rotation-restricting members 35a, 35b on both sides of the inner surface of the finger hook 35. However, the finger hook 35 may be provided on only one side. That is, if only the rotation-restricting member 35a at the rotation start end of the stand control lever 31 is provided, rotation at the start end can be restricted. If only the rotation-restricting member 35b at the rotation end end is provided, rotation at the rotation end can be restricted. Also, in FIG. 8, only the rotation-restricting member 35b at the rotation end end is modified. However, only the rotation-restricting member 35a at the rotation start end may be modified. The shapes and arrangements of the rotation-restricting members 35a and 35b can be modified as appropriate. In this way, by determining the direction of rotation of the stand control lever 31 to be restricted and the shape and arrangement of the rotation-restricting members 35a, 35b according to the application, and by providing multiple stand control levers 31, the user can select and use the stand control lever 31 most suitable for the medical procedure. [Explanation of symbols]

[0030] 10 Endoscopy 11 Gripping part 12 Control section 13 Insertion section 13a Tip 13b Curved section 13c Flexible part 14 Universal Code 15 Connection 17 Treatment tool insertion port 18 Treatment tools 21 Up and down angle knob 22 Left and right angle knob 23 Upper and lower lock lever 24 Left and right lock knobs 25 Operation buttons 31 Standing platform operation lever 32 Treatment equipment stand (stand) 32a Guide surface 33 Standing platform rotation lever 34 Mounting material 34a Connection part 34b Arm 35 Finger rest 35a, 35b Rotation restriction members 36a Fitting groove 36b Fitting protrusion 37a Fitting protrusion 37b Fitting recess 40 Standing platform rotation mechanism 41 Main body 41a Outer surface 42 Rotating member 45 Crank parts 46 Slider 47 Towing Wire 51 Rotating shaft θ, θ1, θ2, θ3, θ4 angle θ1a, θ2a, θ3a angle R Rotation direction R1 Rotation start position R2, R3, R4 Rotation end positions

Claims

1. An endoscope including a bending operation member attached to a main body of an operation section, and a stand operation lever for changing an erection angle of a treatment instrument erection stand for erecting a treatment instrument provided at a distal end of an insertion section, The stand operation lever has a finger hook with a rotation restriction member provided on the inside, and the rotation of the stand operation lever is restricted by the rotation restriction member coming into contact with the outer circumferential surface of the main body of the operation unit, the rotation restricting members protrude toward the outer circumferential surface on both sides of the inner width direction of the finger hook portion, The elevator operating lever is attached to the main body on the same rotation axis as the bending operating member, The elevator operating lever rotates around the rotation axis along the outer circumferential surface of the main body, The finger hook rotates along the outer circumferential surface of the main body in accordance with the rotation of the elevator operation lever, the finger hook portion has a shape extending around the outer periphery of the bending operation member along the rotation direction of the elevator operation lever, An endoscope in which the width direction of the inner side of the finger hook is the direction in which the finger hook extends along the rotation direction.

2. 2. The endoscope according to claim 1, wherein the range of rotation of the treatment instrument elevator varies in accordance with the range of rotation of the elevator operation lever.

3. 3. The endoscope according to claim 1, wherein the range of rotation of the treatment instrument stand is changed by changing the position or shape of the rotation restricting member.

4. 3. The endoscope according to claim 1, wherein the range of rotation of the treatment instrument stand is changed by changing the height of the rotation restricting member in a direction perpendicular to the installation surface or the width of the rotation restricting member in a direction horizontal to the installation surface.

5. 5. The endoscope according to claim 1, wherein the stand operation levers have a plurality of different positions or shapes of the rotation restricting member, and the range of rotation of the treatment instrument stand is changed by replacing the stand operation levers.

6. 2. The endoscope according to claim 1, wherein the finger hook is detachable when the bending operation member and the stand operation lever are attached to the main body of the operation unit, and the range of rotation of the treatment instrument stand can be changed by replacing the rotation restricting member with the finger hook having a different position or shape.

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