Traction rope mounting assembly, active bending section and endoscope

Abstract

The present invention discloses a traction rope installation assembly, an active bending section and an endoscope, and relates to the technical field of medical devices. The traction rope installation assembly includes a snake bone first section and a traction rope. The snake bone first section includes: a main body and a first structural part, the first structural part is arranged on the main body and protrudes along the radial direction of the main body, and the first structural part is surrounded by a wire passing hole. The traction rope is passed through and stamped and fixed in the wire passing hole. The traction rope is passed through the wire passing hole surrounded by the first structural part, and the traction rope is fixed in the wire passing hole by stamping, so that the traction rope and the snake bone first section are fixed together. The traction rope and the snake bone first section are fixed by stamping. This fixing method will not change the material crystal phase of the snake bone first section and the traction rope, and thus will not reduce the structural strength of the snake bone first section and the traction rope. At the same time, the traction rope and the snake bone first section can be tightly connected together, which solves the problem that the structural strength of the snake bone first section and the traction rope is reduced due to welding.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a traction rope installation assembly, an active bending section and an endoscope. Background Art

[0002] Endoscope is a commonly used medical device. It is an inspection device that can directly enter the natural channels of the human body and provide the operator with sufficient diagnostic information to treat diseases. The endoscope can achieve active bending thanks to the snake joints in the endoscope. The operator can use the traction rope to rotate the snake joints, so that the endoscope can move freely in the natural channels of the human body.

[0003] At present, the traction rope and the first section of the snake bone are usually fixed by welding. However, the welding process will provide strong energy to the snake bone section and the traction rope, so as to change the crystal phase of the material of the snake bone section and the traction rope, which will cause the structural strength of the welding point of the snake bone section and the traction rope to decrease. After the traction rope is pulled multiple times, it is easy to cause the welding point of the snake bone section and the traction rope to break brittlely. Summary of the invention

[0004] The present invention discloses a traction rope installation assembly, an active bending section and an endoscope, so as to at least partially improve the above technical problems.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] On the one hand, the embodiment of the present application provides a traction rope installation assembly, including: a snake bone first section and a traction rope. The snake bone first section includes: a body and a first structure part, the first structure part is arranged on the body and protrudes along the radial direction of the body, and the first structure part is surrounded by a wire hole. The traction rope is passed through and stamped and fixed in the wire hole.

[0007] In one embodiment, the body is provided with cutting slits, the first structural portion is located between two of the cutting slits, and the cutting slits are extended along the axial direction of the body.

[0008] In one embodiment, two ends of a projection of the cutting slit in the radial direction of the body respectively extend out of two ends of a projection of the first structure portion in the radial direction of the body.

[0009] In one embodiment, the main body includes a first end and a second end relative to each other, the first end is used to connect to the front end seat, and the second end is used to connect to the snake bone joint; the first structural part protrudes in the direction of the first end, or the first structural part protrudes in the direction of the second end.

[0010] In one embodiment, the snake bone first section also includes: a second structural part, the second structural part is connected to the main body, the second structural part and the first structural part are axially distributed, and the second structural part is used to abut at least a partial area of ​​the first structural part.

[0011] In one embodiment, in the radial direction of the main body, the first structure portion protrudes further from the main body than the second structure portion, the traction rope abuts against the outer surface of the first structure portion, and a portion of the first structure portion away from the main body covers the second structure portion in the radial direction of the main body.

[0012] In one embodiment, the first structural parts are provided in plurality, wherein two of the first structural parts are symmetrically distributed along the radial direction of the main body, and the traction rope is provided in plurality, and the traction rope passes through the plurality of the wire passing holes in sequence.

[0013] In one embodiment, a connecting line of two first structural parts symmetrically distributed along the radial direction of the body is consistent with the pulling direction of the traction rope.

[0014] In one embodiment, the traction rope passes through the wire-passing hole multiple times, so that there are multiple strands of the traction rope in the wire-passing hole.

[0015] On the other hand, an embodiment of the present application also provides an active bending section, including a traction rope mounting assembly and a snake bone unit as described above, wherein the main body includes a first end and a second end relative to each other, the snake bone unit is connected to the second end, and the snake bone unit is provided with a threading hole. The traction rope passes through the threading hole and then through the threading hole. When projected in the radial direction of the main body, the traction rope itself has an angle greater than 90°.

[0016] On the other hand, an embodiment of the present application also provides an endoscope, comprising any one of the traction rope mounting assemblies described above.

[0017] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0018] The traction rope installation assembly provided in the embodiment of the present application is configured by setting the first section of the snake bone to include a main body and a first structural part, and configuring the first structural part to protrude in the radial direction of the main body, and then passing the traction rope through the wire hole surrounded by the first structural part, and fixing the traction rope in the wire hole by stamping, so that the traction rope and the first section of the snake bone are fixed together. In the embodiment of the present application, the traction rope and the first section of the snake bone are fixed by stamping. This fixing method will not change the material crystal phase of the first section of the snake bone and the traction rope, and will not reduce the structural strength of the first section of the snake bone and the traction rope. At the same time, the traction rope and the first section of the snake bone can be tightly connected together, which solves the problem in the prior art that the first section of the snake bone and the traction rope are welded, resulting in a decrease in the structural strength of the first section of the snake bone and the traction rope. The above-mentioned problem can also be solved when the above-mentioned traction rope installation assembly is applied to an endoscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A structural schematic diagram of a traction rope installation assembly in one embodiment of the present application is shown.

[0021] Figure 2 A front view of a traction rope mounting assembly in one embodiment of the present application is shown.

[0022] Figure 3 A top view of a traction rope mounting assembly in one embodiment of the present application is shown.

[0023] Figure 4 A cross-sectional view of a traction rope mounting assembly in one embodiment of the present application is shown.

[0024] Figure 5 yes Figure 4 Enlarged view of point C in the middle.

[0025] Figure 6 yes Figure 2 Enlarged view of point B in the middle.

[0026] Figure 7 yes Figure 1 Enlarged view of point A in the middle.

[0027] Figure 8 A schematic structural diagram of an active bending section in an embodiment of the present application is shown.

[0028] Fig. 9A schematic structural diagram of an endoscope in one embodiment of the present application is shown.

[0029] In the figure: 1, endoscope; 10, traction rope installation assembly; 110, first section of snake bone; 111, main body; 1111, cutting seam; 1112, first end; 1113, second end; 112, first structural part; 1121, wire hole; 113, second structural part; 120, traction rope; 2, active bending section; 20, snake bone unit; 210, threading hole. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0031] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0032] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0033] The inventive concept of the present application is described here:

[0034] Endoscope is a commonly used medical device. It is an inspection device that can directly enter the natural channels of the human body and provide the operator with sufficient diagnostic information to treat diseases. The endoscope can achieve active bending thanks to the snake joints in the endoscope. The operator can use the traction rope to rotate the snake joints, so that the endoscope can move freely in the natural channels of the human body.

[0035] At present, the traction rope and the first section of the snake bone are usually fixed by welding. However, since the welding process will provide strong energy to the first section of the snake bone and the traction rope, it will change the crystal phase of the material of the snake bone section and the traction rope, thereby welding the first section of the snake bone and the traction rope together. Although this can make the first section of the snake bone and the traction firmly connected, it will cause the structural strength of the welding point between the first section of the snake bone and the traction rope to decrease. After the traction rope is pulled many times, it is easy to cause the welding point between the snake bone section and the traction rope to break brittlely.

[0036] Based on this, the inventor provides a traction rope installation assembly, which uses stamping to fix the traction rope and the first section of the snake bone together, which does not change the material crystal structure of the traction rope and the first section of the snake bone, and can achieve a tight and stable connection between the traction rope and the first section of the snake bone. Figures 1 to 9 , the traction rope installation assembly provided by the present application is described in detail through specific embodiments and their application scenarios.

[0037] Please also see Figure 1-Figure 3 The embodiment of the present application provides a traction rope installation assembly 10 for installing a traction rope 120. The traction rope installation assembly 10 may include: a snake bone first section 110 and a traction rope 120.

[0038] The snake bone first section 110 may include a main body 111 and a first structural portion 112, wherein the main body 111 may be set as a cylindrical structure with a hollow interior. The specific form may be set according to actual conditions and is not limited here. The first structural portion 112 may be set on the main body 111 and protrude in the radial direction of the main body 111. The embodiment of the present application does not limit the specific protruding direction. For example, it may protrude radially outward or radially inward. It is understandable that the radially inward protrusion of the first structural portion 112 may help reduce the outer circumferential size of the entire snake bone first section 110, and the radially outward protrusion of the first structural portion 112 may be more conducive to the insertion of the traction rope 120. The specific form may be set according to specific conditions. For ease of explanation, the following description will be taken as an example of the radially inward protrusion of the first structural portion 112.

[0039] It should be noted that the embodiment of the present application does not limit the specific number and location of the first structural portion 112, nor does it limit the number of traction ropes 120. Figure 1For example, in one embodiment, a plurality of first structural parts 112 may be provided, wherein two first structural parts 112 are symmetrically distributed along the radial direction of the body 111, and the connection direction of the two first structural parts 112 is consistent with the pulling direction of the traction rope 120. In other embodiments, the first structural part 112 may also be provided at other positions, which may help improve the stability of the connection between the traction rope 120 and the first structural part 112. In addition, the embodiments of the present application do not limit the specific position of the first structural part 112. For example, in one embodiment, a plurality of first structural parts 112 may be provided on the same axial cross section of the body 111, which may facilitate the installation of the traction rope 120. In other embodiments, the first structural portion 112 can also be arranged along the axial direction of the main body 111 of the snake bone first section 110, that is, the first structural portion 112 is not on the same cross-section, so that when the traction rope 120 is pulled, the traction rope 120 will be subjected to the axial component of the main body 111 of the snake bone first section 110, so that the traction rope 120 is fixed more stably.

[0040] In addition, the traction rope 120 can be provided as one, and the traction rope 120 can be sequentially passed through a plurality of wire holes 1121, which can help reduce the space volume occupied by the traction rope 120, and also facilitate the traction rope 120 to be passed through the wire hole 1121. In addition, the embodiment of the present application does not limit the specific way of passing the traction rope 120. For example, in one embodiment, the traction rope 120 at least goes around the inner wall of the body 111 once, and the traction rope 120 can pass through the wire hole 1121 multiple times, so that there are multiple strands of traction rope 120 in the wire hole 1121. In the subsequent stamping process, the area where the traction rope 120 is crimped can be larger, which is conducive to improving the stability of the connection between the traction rope 120 and the first structural part 112, and can reduce or avoid the risk of loose crimping of the traction rope 120 during the stamping process.

[0041] Please also see Figure 1 and Figure 4 It can be understood that, in one embodiment, the traction rope 120 located between adjacent first structural parts 112 can be in close contact with the inner wall of the body 111, so that the traction rope 120 can be prevented from occupying too much internal space. The embodiment of the present application does not limit the specific method of the aforementioned close contact, for example, it can be directly bonded by glue, etc. In addition, before stamping the first structural part 112 and the traction rope 120, the traction rope 120 can be tightened first so that the traction rope 120 has a preset tension. At the same time, the traction rope 120 will gather toward the center of the snake bone first section 110, so that the traction rope 120 is tightly against the inner wall of the wire hole 1121 formed in the first structural part 112. In this way, after stamping, the traction rope 120 can be connected more tightly with the first structural part 112 after stamping, preventing the traction rope 120 from being not pressed.

[0042] For details, please refer to Figure 1 In this embodiment, the body 111 may include a first end 1112 and a second end 1113 relative to each other, wherein the first end 1112 may be used to connect to the front end seat, and the second end 1113 may be used to connect to the snake bone joint. The embodiment of the present application does not limit the direction in which the first structural part 112 is stamped. For example, in one embodiment, the first structural part 112 may be configured to be stamped in a direction from the first end 1112 to the second end 1113, and the first structural part 112 protrudes in the direction of the second end 1113. For another example, in another embodiment, the first structural part 112 may be configured to be stamped in a direction from the second end 1113 to the first end 1112, and the first structural part 112 protrudes in the direction of the first end 1112. The specific method used is not limited in this application. If the first stamping method is used, the stamping accuracy requirement is high to avoid deformation of the second end 1113 during the stamping process, thereby affecting the subsequent connection with the snake bone joint. If the second stamping method is used, the stamping accuracy is also required to be high. In the subsequent use process, when the traction rope 120 is pulled, the direction of the force on the traction rope 120 is from the first end 1112 to the second end 1113. Therefore, in the stamping process of the first structural part 112, it is necessary not only to ensure that there is sufficient friction between the traction rope 120 and the first structural part 112 in the circumferential direction of the main body 111 to prevent the traction rope 120 from sliding relative to the first structural part 112, but also to ensure that there is sufficient friction between the traction rope 120 and the first structural part 112 sub-components in the axial direction of the main body 111 to prevent the traction rope 120 from falling out of the first structural part 112. The specific stamping method can be set according to the actual situation and is not limited here. The embodiment of the present application is described by taking the protrusion of the first structural part 112 in the direction of the second end 1113 as an example.

[0043] Please also see Figure 1 , Figure 4 and Figure 5 The first structure part 112 is surrounded by a wire hole 1121. It should be noted that the wire hole 1121 can be surrounded by the first structure part 112 alone, or by the first structure part 112 and the body 111 together, which is not limited here. In this embodiment, the first structure part 112 can be formed by stamping the body 111.

[0044] For details, please also refer to Figure 1 , Figure 2 and Figure 6In this embodiment, the main body 111 may be provided with a cutting slit 1111, and the cutting slit 1111 may be provided as a long strip structure. By punching between two adjacent cutting slits 1111, a first structural portion 112 protruding along the radial direction of the main body 111 may be formed, and a wire hole 1121 may be formed.

[0045] Further, in this embodiment, the cutting slit 1111 can be extended along the axial direction of the body 111, that is, the cutting slit 1111 can be vertically arranged. In this embodiment, when the traction rope 120 is subsequently inserted into the wire hole 1121 and the first structure part 112 is punched, the traction rope 120 is subjected to the pressure of the first structure part 112 to be tightly connected with the first structure part 112. If the cutting slit 1111 is extended along the circumferential direction of the body 111, when the traction rope 120 is subsequently inserted into the wire hole 1121 and the first structure part 112 is punched, the punching direction is the radial direction, which not only makes the punching difficult, but also during the punching process, the traction rope 120 is subjected to the shear force of the first structure part 112, which easily leads to the risk of breaking the traction rope 120 due to the excessive punching of the first structure part 112, or the risk of loosening between the traction rope 120 and the first structure part 112 due to insufficient punching of the first structure part 112.

[0046] For further information, please also refer to Figure 6 and Figure 7 , the projected length of the cutting slit 1111 in the radial direction of the body 111 may be greater than the projected length of the first structural portion 112 in the radial direction of the body 111. That is to say, in this embodiment, the cutting slit 1111 has a reserved space for punching. It is understandable that when the first structural portion 112 is punched, the body 111 will be involved and deformed together with the moving body 111, and the aforementioned reserved space can prevent the body 111 from deforming, so that the deformation only occurs in the area between the two cutting slits 1111. The embodiment of the present application does not limit the specific length of the cutting slit 1111 in the axial direction of the body 111, and it is set according to actual conditions.

[0047] In a more specific embodiment, two ends of the projection of the cutting slit 1111 in the radial direction of the body 111 extend out of two ends of the projection of the first structure portion 112 in the radial direction of the body 111. In other words, in this embodiment, there is a reserved space above and below the cutting slit 1111, which can further prevent the body 111 from being deformed during the stamping process of the first structure portion 112.

[0048] Also, please refer again to Figure 1 and Figure 5In some embodiments, the snake bone first section 110 may further include a second structural portion 113, which may be connected to the body 111, and the second structural portion 113 may be axially distributed with the first structural portion 112. The embodiment of the present application does not limit the specifics of the second structural portion 113, which may be specifically set according to the stamping direction of the first structural portion 112. As mentioned above, since the first structural portion 112 protrudes toward the second end portion 1113 in the embodiment of the present application, the second structural portion 113 may be set on one side of the first structural portion 112 close to the second end portion 1113. The second structural portion 113 may be used to abut against at least a portion of the first structural portion 112, so as to ensure that the first structural portion 112 is stamped more in place and that the traction rope 120 and the first structural portion 112 are more closely connected.

[0049] It should be noted that the embodiment of the present application does not limit the specific form of the second structural portion 113. For example, in some embodiments, the second structural portion 113 can be set as a rod-shaped structure. For example, in another embodiment, the second structural portion 113 can be set as a stepped structure, that is, in this embodiment, the body 111 can be expanded to form the second structural portion 113. It is understandable that in some other embodiments, a pad or other structure can be set in the stamping process to replace the role of the second structural portion 113. However, this will increase the difficulty of stamping. For example, it is necessary to consider how to fix the aforementioned pad and prevent the pad from being displaced during the stamping process. In this embodiment, since the second structural portion 113 is directly set, that is, the second structural portion 113 is formed integrally with the body 111, there is no need to consider the aforementioned problem during the stamping process, which can reduce the difficulty of the stamping process.

[0050] Further, in the present embodiment, in the radial direction of the body 111, the first structure portion 112 protrudes further from the body 111 than the second structure, the traction rope 120 abuts against the outer surface of the first structure portion 112, and the portion of the first structure portion 112 away from the body 111 covers the second structure portion 113 in the radial direction of the body 111. That is, in the present embodiment, the first structure portion 112 can be stamped to partially cover the second structure portion 113, so that the second structure portion 113 can abut against a partial area of ​​the first structure portion 112, and after the first structure portion 112 is stamped, the traction rope 120 is enclosed in the wire hole 1121 to prevent the traction rope 120 from slipping out of the first structure portion 112.

[0051] In summary, the traction rope installation assembly 10 provided in the embodiment of the present application is configured to include a body 111 and a first structural portion 112, and the first structural portion 112 is configured to protrude in the radial direction of the body 111, and then the traction rope 120 is passed through the wire hole 1121 surrounded by the first structural portion 112, and the traction rope 120 is fixed in the wire hole 1121 by stamping, so that the traction rope 120 is fixed to the serpentine first section 110. In the embodiment of the present application, the traction rope 120 and the serpentine first section 110 are fixed by stamping, and this fixing method will not change the material crystal phase of the serpentine first section 110 and the traction rope 120, and thus will not reduce the structural strength of the serpentine first section 110 and the traction rope 120, while being able to tightly connect the traction rope 120 and the serpentine first section 110 together, thereby solving the problem in the prior art that the serpentine first section 110 and the traction rope 120 are welded, resulting in a decrease in the structural strength of the serpentine first section 110 and the traction rope 120.

[0052] See also Figure 8 The embodiment of the present application also provides an active bending section 2, which may include the aforementioned traction rope installation assembly 10 and a snake bone unit 20, the snake bone unit 20 is connected to the second end 1113 of the main body 111, and the snake bone unit 20 may be provided with a threading hole 210, which may be used to thread the traction rope 120. The embodiment of the present application does not limit the specific formation method of the threading hole 210, and the details may refer to the relevant prior art.

[0053] In this embodiment, the threading hole 210 and the wire passing hole 1121 can be arranged along the radial direction of the body, so that the traction rope 120 can be passed through the threading hole 210 and the wire passing hole 1121 in sequence. It can be understood that after the traction rope 120 is passed through the wire passing hole 1121, the traction rope 120 extends around the axial direction of the body 111. Since the traction rope 120 needs to be tightened after passing through the wire passing hole 1121, as mentioned above, since the threading hole 210 and the wire passing hole 1121 can be arranged along the radial direction of the body, the traction rope 120 will be bent at 90° after being guided by the threading hole 210 and the wire passing hole 1121, so the traction rope 120 is easily subjected to a large shear force at the part in contact with the wire passing hole 1121.

[0054] Further, in a preferred embodiment, the traction rope 120 passes through the threading hole 210 and then through the wire hole 1121. At this time, the angle of the traction rope 120 itself is greater than 90° when projected in the radial direction of the body, that is, the traction rope 120 can be arranged to be guided by the threading hole 210 and the wire hole 1121, and then the traction rope 120 will be bent by more than 90°, so that the shear force on the traction rope 120 can be reduced, and the traction rope 120 is relatively not easy to be damaged, which is conducive to improving the service life of the traction rope 120.

[0055] Please also see Figure 1 , Figure 8 and Fig. 9 The embodiment of the present application also provides an endoscope 1, comprising the active bending section 2 as described above. The endoscope 1 provided in the embodiment of the present application can also solve the problem in the prior art that the first section 110 of the snake bone and the traction rope 120 are welded, resulting in a decrease in the structural strength of the first section 110 of the snake bone and the traction rope 120.

[0056] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0057] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0058] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A traction rope installation assembly, characterized in that: include: The first section of the snake bone comprises: a main body and a first structure part, wherein the first structure part is arranged on the main body and protrudes along the radial direction of the main body, and the first structure part is surrounded by a wire hole; and, A traction rope, which is passed through and fixed by punching in the wire-passing hole; The first section of the snake bone also includes: a second structural part, the second structural part is connected to the main body, the second structural part and the first structural part are axially distributed, and the second structural part is used to abut at least a part of the area of ​​the first structural part.

2. The traction rope installation assembly according to claim 1, characterized in that: The body is provided with cutting slits, the first structure part is located between two of the cutting slits, and the cutting slits are extended along the axial direction of the body.

3. The traction rope installation assembly according to claim 2, characterized in that: Two ends of a projection of the cutting slit in the radial direction of the body respectively extend out of two ends of a projection of the first structure portion in the radial direction of the body.

4. The traction rope installation assembly according to claim 1, characterized in that: The main body includes a first end and a second end relative to each other, the first end is used to connect to the front end seat, and the second end is used to connect to the snake bone segment; the first structural part protrudes in the direction of the first end, or the first structural part protrudes in the direction of the second end.

5. The traction rope installation assembly according to claim 1, characterized in that: In the radial direction of the body, the first structure part protrudes further from the body than the second structure part, the traction rope abuts against the outer surface of the first structure part, and the part of the first structure part away from the body covers the second structure part in the radial direction of the body.

6. The traction rope installation assembly according to any one of claims 1 to 5, characterized in that: There are a plurality of the first structural parts, wherein two of the first structural parts are symmetrically distributed along the radial direction of the body, and there is one traction rope, which passes through the plurality of the wire passing holes in sequence; And / or, the traction rope passes through the wire passing hole multiple times so that there are multiple strands of the traction rope in the wire passing hole.

7. The traction rope installation assembly according to claim 6, characterized in that: The connecting line of the two first structural parts symmetrically distributed along the radial direction of the main body is consistent with the pulling direction of the traction rope.

8. An active bending section, characterized in that: It comprises a traction rope installation assembly and a snake bone unit as described in any one of claims 1 to 7, the main body comprises a first end and a second end opposite to each other, the snake bone unit is connected to the second end, the snake bone unit is provided with a threading hole, the traction rope passes through the threading hole and then through the threading hole, and the angle of the traction rope itself is greater than 90° when projected in the radial direction of the main body.

9. An endoscope, characterized in that: Comprising the active bending section as described in claim 8.

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