Endoscope and bending control mechanism thereof

Abstract

The utility model discloses an endoscope and a bending control mechanism thereof. The bending control mechanism comprises a shaft body, a main jacking body, an unwinding wheel, a jacked body and a flexible elastic damping ring, wherein the main jacking body can rotate around the axis of the shaft body; the unwinding wheel is sleeved on the shaft body and can rotate around the shaft body; the jacked body is located between the main jacking body and the unwinding wheel in the axial direction of the shaft body, and the main jacking body pushes the jacked body to slide towards the position close to the unwinding wheel in the process of rotating around the axis of the shaft body. The shaft body is sleeved with the elastic damping ring, the elastic damping ring is located between the jacked body and the unwinding wheel in the axial direction of the shaft body, the elastic damping ring is extruded and deformed by the unwinding wheel and the jacked body in the process that the jacked body slides towards the position close to the unwinding wheel, and the elastic damping ring which is extruded and deformed locks the unwinding wheel; the structure is simplified, the cost is saved, and production and assembly are facilitated.

Description

Technical Field

[0001] The utility model relates to a medical device, in particular to an endoscope and a bending control mechanism thereof. Background Art

[0002] As we all know, medical endoscopes are widely used in surgical operations and routine medical examinations. Compared with traditional surgical operations, minimally invasive surgeries using medical endoscopes have smaller incisions and patients recover faster after surgery. Therefore, medical endoscopes are becoming more and more popular in the medical industry.

[0003] Among them, in the existing medical endoscope, the control mechanism for controlling the distal end of the insertion portion to bend up, down, left and right has the defect of a relatively complex structure. The reason is that: in addition to the linkage cooperation structure between the main top wheel and the receiving top wheel, a compression spring is required between the receiving top wheel and the unwinding wheel, as well as an engaging protrusion on the receiving top wheel and an engaging groove on the unwinding wheel; the main top wheel pushes the receiving top wheel toward the unwinding wheel, so that the engaging protrusion of the receiving top wheel is engaged with the engaging groove of the unwinding wheel, thereby achieving the purpose of locking the receiving top wheel and the unwinding wheel, and the compression spring at this time provides elastic force for the receiving top wheel to reset.

[0004] However, such a structure will make the structure of the control mechanism more complicated, which is not conducive to production and assembly.

[0005] Therefore, there is an urgent need for an endoscope and a bending control mechanism thereof to overcome the above-mentioned defects. Utility Model Content

[0006] An object of the present invention is to provide a bending control mechanism for an endoscope, so as to simplify the structure, save costs and facilitate production and assembly.

[0007] Another object of the present invention is to provide a bending control mechanism for an endoscope, so as to simplify the structure, save costs and facilitate production and assembly.

[0008] To achieve the above-mentioned objectives, the bending control mechanism of the endoscope of the present invention comprises a shaft, a main top body that can rotate about the axis of the shaft, an unwinding wheel that is externally mounted on the shaft and can rotate about the shaft, a support body that is externally mounted on the shaft and can slide in the axial direction of the shaft, and a flexible elastic damping ring. The support body is located between the main top body and the unwinding wheel in the axial direction of the shaft, and the main top body pushes the support body to slide toward the unwinding wheel during the process of rotating about the axis of the shaft. The elastic damping ring is externally mounted on the shaft, and is located between the support body and the unwinding wheel in the axial direction of the shaft. The elastic damping ring is squeezed and deformed by both the unwinding wheel and the support body during the process of the support body sliding toward the unwinding wheel, and the unwinding wheel is locked by the squeezed and deformed elastic damping ring.

[0009] Compared with the prior art, with the help of a flexible elastic damping ring which is sleeved on the shaft and located between the top-receiving body and the unwinding wheel in the axial direction of the shaft, the elastic damping ring is squeezed and deformed by both the unwinding wheel and the top-receiving body during the process of the top-receiving body sliding toward the unwinding wheel, thereby locking the unwinding wheel by the squeezed and deformed elastic damping ring. Compared with the traditional method, structures such as the compression spring, the engaging protrusion and the engaging groove are omitted, thereby simplifying the structure of the bending control mechanism of the utility model, saving costs and facilitating production and assembly.

[0010] Preferably, the receiving body is provided with a guide structure for guiding the sliding of the receiving body, and the guide structure is arranged along the axial direction of the shaft body; a plurality of guide structures are arranged spaced apart in the circumferential direction of the receiving body, and the guide structure is an outer protrusion protruding from the receiving body.

[0011] Preferably, the main top body is provided with a main top spiral surface that spirally inclines and rises toward the receiving body, the spiral center line of the main top spiral surface coincides with the axial center line of the shaft body, and the receiving body is correspondingly provided with a receiving spiral surface that pushes and cooperates with the main top spiral surface.

[0012] Preferably, a plurality of the main top spiral surfaces are arranged spaced apart in the circumferential direction of the main top body, and each of the main top spiral surfaces corresponds to one of the receiving top spiral surfaces.

[0013] Preferably, the elastic damping ring is partially embedded in the top receiving body and has an interference fit with the top receiving body; the elastic damping ring is a rubber damping ring or a silicone damping ring.

[0014] Preferably, the unwinding wheel includes a first unwinding wheel and a second unwinding wheel, a partition plate which is externally mounted on the shaft body is provided between the first unwinding wheel and the second unwinding wheel, the elastic damping ring, the top receiving body and the main top body are sequentially arranged on the side of the first unwinding wheel which is opposite to the partition plate, and the main top body is fixed together with the shaft body; the elastic damping ring, the top receiving body and the main top body are sequentially arranged on the side of the second unwinding wheel which is opposite to the partition plate, and the main top body can be rotatably externally mounted on the shaft body.

[0015] Preferably, the bending control mechanism of the endoscope of the present invention also includes a cylindrical frame fixedly connected to the partition and externally mounted on both the main top body and the top receiving body configured for the first unwinding wheel, the cylindrical frame is provided with a limiting structure for limiting the rotation angle of the shaft body around the axis of the shaft body, and the main top body fixedly connected to the shaft body is provided with a matching limiting structure that cooperates with the limiting structure to limit the position.

[0016] Preferably, a first cylinder is axially extended from the center position of the first unwinding wheel and is sleeved on the shaft body. The first cylinder passes through the partition, the second unwinding wheel and the elastic damping ring, the top body and the main top body configured for the second unwinding wheel. The first cylinder is also assembled and connected with a first knob. A second cylinder is axially extended from the center position of the second unwinding wheel and is sleeved on the first cylinder. The second cylinder passes through the elastic damping ring, the top body and the main top body configured for the second unwinding wheel. The second cylinder is also assembled and connected with a second knob.

[0017] Preferably, an operating handle is fixed on the main top body of the second unwinding wheel, an operating cap is fixed on the shaft, and the operating handle, second knob, first knob and operating cap are arranged in sequence along the passing direction of the second cylinder.

[0018] To achieve the above-mentioned purpose, the endoscope of the present invention comprises a handle, an insertion portion, and the aforementioned bending control mechanism. The proximal end of the insertion portion is assembled and connected to the handle, and the bending control mechanism is assembled on the handle and is used to control the bending movement of the distal end of the insertion portion.

[0019] Compared with the prior art, since the endoscope of the present invention includes a bending control mechanism, the endoscope of the present invention also has the aforementioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the endoscope of the present invention.

[0021] Figure 2 It is a three-dimensional diagram of the bending control mechanism in the endoscope of the present invention.

[0022] Figure 3 yes Figure 2 An exploded perspective view of the bending control mechanism shown.

[0023] Figure 4 yes Figure 2 The bending control mechanism is shown in a top-down plan view.

[0024] Figure 5 It is along Figure 4 Internal view cut along the midline BB.

[0025] Figure 6 yes Figure 3 A three-dimensional view of the elastic damping ring and the top receiving body configured and assembled together on the side of the first unwinding wheel facing away from the partition.

[0026] Figure 7 yes Figure 6 3D exploded view of .

[0027] Figure 8 yes Figure 3 A three-dimensional view of the elastic damping ring and the top receiving body configured and assembled together on the side of the second unwinding wheel facing away from the partition.

[0028] Figure 9 yes Figure 8 A three-dimensional image from another angle.

[0029] Figure 10 yes Figure 9 3D exploded view of .

[0030] Figure 11 yes Figure 3 A three-dimensional view of the main top body configured on the side of the second unwinding wheel facing away from the partition.

[0031] Figure 12 yes Figure 3 A three-dimensional view of the cylinder rack in FIG.

[0032] Figure 13 yes Figure 3 A three-dimensional diagram of the main top body and the shaft body configured on the side of the first unwinding wheel facing away from the partition being fixed together.

[0033] Figure 14 yes Figure 13 A stereogram from another angle. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with specific implementation examples and the accompanying drawings, and the technical solutions of the utility model are explained. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. Many specific details are explained in the following description to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below. The embodiments of the utility model are now described with reference to the accompanying drawings, and similar element numbers in the accompanying drawings represent similar elements.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0036] See also Figure 1 The endoscope 100 of the present invention includes a bending control mechanism 10, a handle 20, and an insertion portion 30. The proximal end 31 of the insertion portion 30 is assembled and connected to the handle 20. The bending control mechanism 10 is assembled on the handle 20 and is used to control the bending movement of the distal end 32 of the insertion portion 30. Since the specific structures of the handle 20 and the insertion portion 30 are well known to those skilled in the art, they will not be described in detail here. The specific structure of the bending control mechanism 10 is as follows:

[0037] Combine Figure 2 、 Figure 3 and Figure 5 As an example, the bending control mechanism 10 includes a shaft 11, a main top body 12 that can rotate around the axis C of the shaft 11, a reel 13 that is externally mounted on the shaft 11 and can rotate around the shaft 11, a top-receiving body 14 that is externally mounted on the shaft 11 and can slide in the axial direction of the shaft 11 (as indicated by the double arrow A), and a flexible elastic damping ring 15. The top-receiving body 14 is located between the main top body 12 and the reel 13 in the axial direction of the shaft 11; the elastic damping ring 15 is externally mounted on the shaft 11 and is located between the top-receiving body 14 and the reel 13 in the axial direction of the shaft 11. The state is shown in FIG. Figure 2 and Figure 5 shown.

[0038] Therefore, during the rotation of the main top body 12 around the axis C of the shaft body 11, the main top body 12 pushes the support body 14 to slide toward the unwinding wheel 13. During the sliding of the support body 14 toward the unwinding wheel 13, the elastic damping ring 15 is squeezed and deformed by both the unwinding wheel 13 and the support body 14. The squeezed and deformed elastic damping ring 15 locks the unwinding wheel 13, thereby achieving the purpose of locking the unwinding wheel 13. Among them, the preferred embodiment of how the main top body 12 pushes the support body 14 to slide toward the unwinding wheel 13 is as follows:

[0039] like Figure 3As shown, as an example, the main top body 12 is provided with a main top spiral surface 121 that spirally rises in the direction close to the receiving body 14, and the spiral center line of the main top spiral surface 121 coincides with the axis C of the shaft body 11; the receiving body 14 is correspondingly provided with a receiving spiral surface 142 that pushes and cooperates with the main top spiral surface 121, so that the receiving body 14 generates axial displacement during the rotation of the main top body 12 around the axis C of the shaft body 11 by means of the cooperation between the main top spiral surface 121 and the receiving spiral surface 142, thereby achieving the purpose of the receiving body 14 being pushed by the main top body 12 to slide close to the unwinding wheel 13; therefore, the structure of the main top body 12 pushing the receiving body 14 to slide toward the unwinding wheel 13 is simplified, and the smoothness and reliability of the sliding of the receiving body 14 toward the unwinding wheel 13 is ensured. Specifically, Figure 11 and Figure 14 As an example, a plurality of main top spiral surfaces 121 are arranged in a circumferential direction of the main top body 12, and each main top spiral surface 121 corresponds to a receiving spiral surface 142. Figure 8 shown.

[0040] In order to ensure smoother axial sliding of the top receiving body 14, Figure 3 In the embodiment, the pusher 14 is provided with a guide structure 141 for guiding the sliding of the pusher 14, and the guide structure 141 is arranged along the axial direction of the shaft 11; Figures 6 to 10 As an example, two guide structures 141 are arranged at intervals on the circumference of the top receiving body 14 to guide from two positions on the circumference of the top receiving body 14, further improving the smoothness of the sliding of the top receiving body 14. Obviously, according to actual needs, the number of guide structures 141 can also be three or four. Figures 6 to 10 additionally, the guide structure 141 is a convex block 14 of the top body. Obviously, according to actual needs, the guide structure 141 may be made into a recessed groove on the top body 14, so it is not limited thereto.

[0041] like Figure 5 、 Figure 6 and Figure 9 As shown in FIG. 1 , as an example, the elastic damping ring 15 is partially embedded in the support body 14 and is interference-fitted with the support body 14. That is, the portion of the elastic damping ring 15 embedded in the support body 14 is fixed to the support body 14 by using an interference fit method. The support body 14 provides support for the elastic damping ring 15, thereby simplifying the assembly relationship between the elastic damping ring 15 and the shaft body 11. Specifically, Figure 7 and Figure 10In the embodiment, the receiving top body 14 is provided with an embedded groove 143, which is in interference fit with the elastic damping ring 15. For example, the elastic damping ring 15 is a rubber damping ring or a silica gel damping ring, so that the elastic damping ring 15 has better damping and elastic effect, so that when the main top body 12 is separated from the receiving top body 14, the receiving top body 14 is reset to the direction away from the unwinding wheel 13 by the elastic reset force of the elastic damping ring 15.

[0042] As shown in Figure 2 , Figure 3 and Figure 5 , the unwinding wheel 13 includes a first unwinding wheel 13a and a second unwinding wheel 13b, which meet the needs of the first unwinding wheel 13a for unwinding the first traction member (for example, but not limited to, a steel wire rope) and the second unwinding wheel 13b for unwinding the second traction member (for example, but not limited to, a steel wire rope), so that the first unwinding wheel 13a controls the bending movement (for example, but not limited to, left-right bending movement) of the distal end 32 of the insertion part 30 through the first traction member, and the second unwinding wheel 13b controls the bending movement (for example, but not limited to, up-down bending movement) of the distal end 32 of the insertion part 30 through the second traction member. Since the assembly relationship between the first traction member and the distal end 32 of the insertion part 30, the assembly relationship between the first traction member and the first unwinding wheel 13a, the assembly relationship between the second traction member and the distal end 32 of the insertion part 30, and the assembly relationship between the second traction member and the second unwinding wheel 13a are well known in the art, they will not be described here.

[0043] Meanwhile, a partition plate 16 is provided on the shaft body 11 between the first unwinding wheel 13a and the second unwinding wheel 13b, which provides axial limiting action for the first unwinding wheel 13a and the second unwinding wheel 13b. The side of the first unwinding wheel 13a opposite to the partition plate 16 is sequentially provided with the elastic damping ring 15, the receiving top body 14 and the main top body 12, which is fixed with the shaft body 11, as shown in Figure 3 , Figure 5 , Figure 13 and Figure 14 . The side of the second unwinding wheel 13b opposite to the partition plate 16 is sequentially provided with the elastic damping ring 15, the receiving top body 14 and the main top body 12, which is rotatably sleeved on the shaft body 11, as shown in Figure 2 and Figure 5 . Therefore, the main top body 12 provided on the side of the first unwinding wheel 13a opposite to the partition plate 16 is fixedly connected with the shaft body 11, and the main top body 12 provided on the side of the second unwinding wheel 13b opposite to the partition plate 16 is rotatably sleeved on the shaft body 11. Therefore, the first unwinding wheel 13a and the second unwinding wheel 13b are provided with corresponding main top bodies 12, receiving top bodies 14 and elastic damping rings 15 for locking.

[0044] In order to ensure that the partition 16 is reliably assembled and fixed with the handle 20, Figure 2 、 Figure 3 and Figure 5 As an example, the bending control mechanism 10 further includes a drum frame 17 fixedly connected to the partition 16 and mounted on both the main top body 12 and the top receiving body 14 configured by the first unwinding wheel 13a. In other words, the drum frame 17 is mounted on the outside of the drum frame 17. Figure 5 On both the main top body 12 and the top body 14 at the lower position; optionally, Figure 2 and Figure 3 As an example, the partition 16 is fixed to the partition 16 at its two opposite ends by screws 171, and the drum frame 17 is fixedly connected to the handle 20. Therefore, when the first unwinding wheel 13a and the second unwinding wheel 13b are locked by the elastic damping ring 15, the partition 16 can provide axial resistance. Figure 5 and Figure 11 As an example, a limiting structure 172 is provided in the cylinder frame 17 for limiting the rotation angle of the shaft body 11 around the axis C of the shaft body 11, and a matching limiting structure 122 is provided on the main top body 12 fixedly connected to the shaft body 11 for cooperating with the limiting structure 172 to limit the position. Optionally, as an example, the limiting structure 172 is a groove structure, and correspondingly, the matching limiting structure 122 is a convex column structure; obviously, according to actual needs, the relationship between the two can be reversed. In addition, combined with Figure 5 and Figure 12 As an example, a guide groove 173 is further provided in the cylinder frame 17 for cooperating with the guide structure 141 on the top receiving body 14 fixedly connected to the shaft body 11.

[0045] Recombination Figure 3 and Figure 5 As an example, a first cylinder 131 is axially extended from the center of the first unwinding wheel 13a and is sleeved on the shaft 11. The first cylinder 131 passes through the partition 16, the second unwinding wheel 13b and the elastic damping ring 15 configured for the second unwinding wheel 13b, the top body 14 and the main top body 12 (i.e. Figure 5The elastic damping ring 15, the top body 14 and the main top body 12 in the upper middle part), the first cylinder 131 is also assembled and connected with a first knob 18a, so that the operator can control the first unwinding wheel 13a to rotate around the shaft 11 with the help of the first knob 18a, so as to correspondingly unwind or rewind the first traction member. A second cylinder 132 is axially extended from the center position of the second unwinding wheel 13b and is sleeved on the first cylinder 131. The second cylinder 132 passes through the elastic damping ring 15, the top body 14 and the main top body 12 configured for the second unwinding wheel 13b. The second cylinder 132 is also assembled and connected with a second knob 18b, so that the operator can control the second unwinding wheel 13b to rotate around the shaft 11 with the help of the second knob 18b, so as to correspondingly unwind or rewind the second traction member. In addition, combined with Figure 2 、 Figure 3 and Figure 5 As an example, an operating cap 19a for operation is fixed on the shaft 11, and an operating handle 19b for operation is fixed on the main top body 12 configured with the second unwinding wheel 13b. The operating handle 19b, the second knob 18b, the first knob 18a and the operating cap 19a are arranged along the passing direction of the second cylinder 132 (visible Figure 5 The main top body 12 provided with the second unwinding wheel 13b is arranged in sequence (from bottom to top) by means of the operating handle 19b, so that the operator can control the main top body 12 configured with the second unwinding wheel 13b to rotate around the shaft body 11; and the operating cap 19a is used to facilitate the operator to control the main top body 12 fixedly connected to the shaft body 11 to rotate around the axis C of the shaft body 11.

[0046] Compared with the prior art, the flexible elastic damping ring 15 is externally mounted on the shaft 11 and is located between the support body 14 and the unwinding wheel 13 in the axial direction of the shaft 11. When the support body 14 slides toward the unwinding wheel 13, the elastic damping ring 15 is squeezed and deformed by both the unwinding wheel 13 and the support body 14, thereby locking the unwinding wheel 13 with the squeezed and deformed elastic damping ring 15. Compared with the conventional method, the compression spring, the engaging protrusion and the engaging groove are omitted, thereby simplifying the structure of the bending control mechanism 10, saving costs and facilitating production and assembly. Since the endoscope 100 of the present invention has the bending control mechanism 10, it also has the beneficial effects of the bending control mechanism 10.

[0047] It is worth noting that Figure 5In the figure, it shows the initial state in which the main top body 12 does not push the receiving body 14 to slide toward the unwinding wheel 13. Therefore, the elastic damping ring 15 is not squeezed by the unwinding wheel 13 and the receiving body 14. In addition, since the main top body 12, the receiving body 14 and the elastic damping ring 15 are both configured on the side facing away from the partition 16 of the first unwinding wheel 13a and the second unwinding wheel 13b, the number of main spiral surfaces 121 of the main top body 12 configured for the first unwinding wheel 13a can be different from the number of main spiral surfaces 121 of the main top body 12 configured for the second unwinding wheel 13b. For example, Figure 14 In the embodiment, the number of the main spiral surfaces 121 of the main top body 12 configured by the first unwinding wheel 13a is two, and Figure 11 In the embodiment, the number of the main spiral surfaces 121 of the main top body 12 configured by the second unwinding wheel 13b is three.

[0048] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved. At the same time, what is disclosed above is only the preferred embodiment of the present invention, and of course it cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A bending control mechanism for an endoscope, comprising a shaft, a main top body rotatable around the axis of the shaft, a reel mounted on the shaft and rotatable around the shaft, and a receiving body mounted on the shaft and slidable in the axial direction of the shaft, wherein the receiving body is located between the main top body and the reel in the axial direction of the shaft, and the main top body pushes the receiving body to slide toward the reel during the process of rotating around the axis of the shaft, characterized in that: The bending control mechanism of the endoscope also includes a flexible elastic damping ring, which is sleeved on the shaft. The elastic damping ring is located between the top-receiving body and the unwinding wheel in the axial direction of the shaft. The elastic damping ring is squeezed and deformed by both the unwinding wheel and the top-receiving body during the process of the top-receiving body sliding toward the unwinding wheel, and the unwinding wheel is locked by the squeezed and deformed elastic damping ring.

2. The bending control mechanism of an endoscope according to claim 1, characterized in that: The receiving body is provided with a guide structure for guiding the sliding of the receiving body, and the guide structure is arranged along the axial direction of the shaft body; a plurality of guide structures are arranged spaced apart in the circumferential direction of the receiving body, and the guide structures are external protrusions protruding from the receiving body.

3. The bending control mechanism of an endoscope according to claim 1, wherein: The main top body is provided with a main top spiral surface that spirally slopes upward in the direction approaching the receiving body, the spiral center line of the main top spiral surface coincides with the axial center line of the shaft body, and the receiving body is correspondingly provided with a receiving spiral surface that pushes and cooperates with the main top spiral surface.

4. The bending control mechanism of an endoscope according to claim 3, characterized in that: A plurality of main top spiral surfaces are arranged spaced apart in the circumferential direction of the main top body, and each main top spiral surface corresponds to one receiving top spiral surface.

5. The bending control mechanism of an endoscope according to claim 1, wherein: The elastic damping ring is partially embedded in the top receiving body and is interference fit with the top receiving body; the elastic damping ring is a rubber damping ring or a silicone damping ring.

6. The bending control mechanism of an endoscope according to claim 1, characterized in that: The unwinding wheel includes a first unwinding wheel and a second unwinding wheel, a partition plate which is sleeved on the shaft body is provided between the first unwinding wheel and the second unwinding wheel, the elastic damping ring, the top receiving body and the main top body are sequentially arranged on the side of the first unwinding wheel facing away from the partition plate, and the main top body is fixed together with the shaft body; the elastic damping ring, the top receiving body and the main top body are sequentially arranged on the side of the second unwinding wheel facing away from the partition plate, and the main top body can be rotatably sleeved on the shaft body around the shaft body.

7. The bending control mechanism of an endoscope according to claim 6, characterized in that: It also includes a cylinder frame fixedly connected to the partition and externally mounted on both the main top body and the top receiving body configured for the first unwinding wheel. The cylinder frame is provided with a limiting structure for limiting the rotation angle of the shaft body around the axial center line of the shaft body, and the main top body fixedly connected to the shaft body is provided with a matching limiting structure that cooperates with the limiting structure to limit the position.

8. The bending control mechanism of an endoscope according to claim 7, characterized in that: A first cylinder is axially extended from the center position of the first unwinding wheel and is sleeved on the shaft. The first cylinder passes through the partition, the second unwinding wheel and the elastic damping ring, the top body and the main top body configured for the second unwinding wheel. The first cylinder is also assembled and connected with a first knob. A second cylinder is axially extended from the center position of the second unwinding wheel and is sleeved on the first cylinder. The second cylinder passes through the elastic damping ring, the top body and the main top body configured for the second unwinding wheel. The second cylinder is also assembled and connected with a second knob.

9. The bending control mechanism of an endoscope according to claim 8, characterized in that: An operating handle is fixed on the main top body of the second unwinding wheel, and an operating cap is fixed on the shaft body. The operating handle, the second knob, the first knob and the operating cap are arranged in sequence along the passing direction of the second cylinder.

10. An endoscope comprising a handle and an insertion portion, wherein the proximal end of the insertion portion is assembled and connected to the handle, characterized in that: The endoscope further comprises a bending control mechanism according to any one of claims 1 to 9, wherein the bending control mechanism is mounted on the handle and is used to control the bending movement of the distal end of the insertion portion.

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