Active bending section, insertion part and endoscope

Abstract

The utility model discloses an active bending section, an insertion part and an endoscope, and relates to the technical field of medical instruments. The active bending section is used for the endoscope, the active bending section comprises a net pipe and a snake bone body, the snake bone body comprises a plurality of snake bone units, and every two adjacent snake bone units are connected and can be bent relatively so as to achieve the bending action of the snake bone body. The net pipe at least sleeves the near end of the snake bone body, so that the bending resistance of the snake bone units on the near end side of the snake bone body is at least increased through the net pipe. At least the near end of the active bending section is provided with the net pipe, when the active bending section is bent, the far end of the active bending section can be bent first and then bent, the area swept by the far end in the bending process of the active bending section can be reduced, and when a doctor uses the device in an operation, the operation difficulty can be reduced, and tissue damage can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an active bending section, an insertion part and an endoscope. Background Art

[0002] The insertion portion of the endoscope includes an active bending section and a passive bending section, with the active bending section located at the distal end of the insertion portion. In related art, a traction rope is provided within the handle, the distal end of which is fixedly connected to the snake-bone unit at the distal end of the active bending section, and the proximal end of which is fixedly connected to a dial or knob on the handle. By operating the dial or knob, the traction ropes can be moved synchronously in opposite directions, thereby bending the active bending section of the insertion portion. A camera module is provided at the distal end of the active bending section. By bending the active bending section, the direction of the camera module can be adjusted, allowing the camera module to be aimed at the lesion site to provide diagnostic information to the doctor.

[0003] However, the inventors discovered that when the active bending segment bends, its proximal end bends before the distal end. This bending method causes the distal end of the active bending segment to sweep a larger area during the bending process. When the doctor uses it during surgery, if it is necessary to bend the active bending segment to the infrarenal calyx end, the operation is more difficult. Utility Model Content

[0004] The utility model discloses an active bending section, an insertion portion and an endoscope, so as to solve the technical problem in the related art that when the active bending section of the endoscope is bent, its distal end sweeps a large area, making it difficult for doctors to operate during surgery.

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

[0006] A first aspect of the present invention provides an active bending segment.

[0007] The active bending section of the utility model is used for an endoscope, and the active bending section includes a mesh tube and a snake bone body, wherein the snake bone body includes a plurality of snake bone units, and two adjacent snake bone units are connected and can bend relative to each other to realize the bending action of the snake bone body; the mesh tube is at least sleeved on the outside of the proximal end of the snake bone body to increase the bending resistance of the snake bone unit on the proximal side of the snake bone body through the mesh tube.

[0008] According to an optional embodiment, the mesh tube includes a tube body, which is a mesh structure formed of wire, and the tube body has an installation channel, which passes through the tube body in an axial direction, and is used to install the snake bone body.

[0009] According to an optional embodiment, the wires include at least a first wire and a second wire, and the first wire and the second wire are woven together to form the mesh structure.

[0010] According to an optional embodiment, there are multiple first wires and multiple second wires, and the first wires and the second wires are distributed obliquely, and the inclination directions of the first wires and the second wires are opposite; or there are multiple first wires and multiple second wires, and the first wires are distributed along one of the transverse direction and the longitudinal direction, and the second wires are distributed along the other of the transverse direction and the longitudinal direction.

[0011] According to an optional embodiment, the hardness of the tube body gradually increases from the distal end to the proximal end.

[0012] According to an optional embodiment, the size of the mesh formed by weaving the first wire and the second wire of the wire gradually decreases from the distal end to the proximal end; or the thickness of the first wire and / or the second wire of the wire gradually increases from the distal end to the proximal end.

[0013] According to an optional embodiment, the wire is made of stainless steel, and both ends of the tube body are welded to the snake-bone unit.

[0014] According to an optional embodiment, the welding point between the tube body and the snake-bone unit is formed as a welding portion, and along the axial direction of the snake-bone unit, the welding portion extends from one end to the other end of the snake-bone unit.

[0015] A second aspect of the present invention provides an insertion portion.

[0016] The insertion portion of the present invention comprises an active bending section and a passive bending section. The active bending section is the active bending section described in any technical solution of the present invention, and the proximal end of the active bending section is connected to the distal end of the passive bending section.

[0017] A third aspect of the present invention provides an endoscope.

[0018] The endoscope of the present invention comprises an insertion portion and a handle. The insertion portion is the insertion portion described in any one of the technical solutions of the present invention, and the proximal end of the insertion portion is connected to the handle.

[0019] The technical solution adopted by the utility model can achieve the following beneficial effects:

[0020] The active bending section of the utility model includes a mesh tube and a snake bone body. The mesh tube is at least sleeved on the outside of the proximal end of the snake bone body. When the active bending section is bent by controlling the traction rope, the snake bone unit at the proximal end of the snake bone body is not only subject to the resistance of the snake bone body itself, but also subject to the constraint of the mesh tube, so that the bending resistance of the snake bone unit on the proximal side of the snake bone body is larger, and the snake bone unit on the distal side of the snake bone body is easier to bend than the snake bone unit on the proximal side. As the tension of the traction rope increases, the snake bone unit on the proximal side can also bend, thereby enabling the active bending section to achieve the form of bending the distal end first and then bending the proximal end.

[0021] The active bending segment's distal end bends before its proximal end, thus reducing the area swept by the distal end during bending. This reduces the difficulty of the procedure during surgery, for example, when bending the active bending segment from the superior to the inferior calyx. It also prevents kidney damage caused by excessive sweeping of the active bending segment during bending. The active bending segment of the present invention addresses the technical issue in related art where the distal end of the active bending segment sweeps a large area during bending, making it difficult for the surgeon to perform the procedure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0023] Figure 1 is a schematic diagram of an endoscope according to an embodiment of the present utility model;

[0024] Figure 2 It is a schematic diagram of the snake bone body of the embodiment of the present utility model;

[0025] Figure 3 This is a first schematic diagram of an embodiment of the present invention in which a mesh tube is sleeved on the proximal end of the snake bone body;

[0026] Figure 4 This is a second schematic diagram of an embodiment of the present invention in which a mesh tube is sleeved on the proximal end of the snake bone body;

[0027] Figure 5 This is a schematic diagram of an embodiment of the utility model wherein a skin is sleeved onto a snake bone body;

[0028] Figure 6 This is a first schematic diagram of a network management system according to an embodiment of the present utility model;

[0029] Figure 7 yes Figure 6 Enlarged view of part A;

[0030] Figure 8 A second schematic diagram of the network management according to an embodiment of the present utility model;

[0031] Figure 9 This is a first schematic diagram of a network management system according to another embodiment of the present invention;

[0032] Figure 10 yes Figure 9 Enlarged view of part B;

[0033] Figure 11 This is a schematic diagram of the active bending section of the embodiment of the utility model in a bent state;

[0034] Figure 12 It is a schematic diagram of the bending path of the active bending section in an embodiment of the present utility model.

[0035] In the figure: 100, active bending section; 110, mesh tube; 111, tube body; 111a, installation channel; 111b, first wire; 111c, second wire; 112, welding part; 113, mesh; 120, snake bone body; 121, snake bone unit; 122, rivet; 130, skin; 200, passive bending section; 300, insertion part; 400, handle. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0037] The terms "first," "second," and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, the term "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0038] In each embodiment of the present invention, "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".

[0039] In related art, the active bending section consists of multiple snake-bone units. Each unit has a traction rope channel on its wall for passage of a traction rope. The traction rope channel is recessed toward the center of the active bending section, and this recessed area is used to install the traction rope. The traction rope passes through each snake-bone unit, with the distal end of the traction rope fixed to the distal end of the active bending section. Furthermore, adjacent snake-bone units are connected by rivets. When the traction rope is used to control the bending of the active bending section, the applied force must overcome the friction between the rivet and the snake-bone unit to bend the active bending section.

[0040] However, the inventors discovered that when the active bending segment is controlled to bend by a traction rope, the force exerted by the traction rope causes the proximal end of the active bending segment to bend first and the distal end to bend later. This bending method results in a larger area swept by the distal end of the active bending segment during the bending process. When the doctor uses it during surgery, if it is necessary to bend the active bending segment to the infrarenal calyx end, the operation is more difficult.

[0041] To this end, the present invention provides an active bending section, in which a mesh tube is disposed at least at the proximal end of the serpentine body. When the active bending section is bent by a traction rope, the proximal end of the serpentine body is not only subject to the resistance of the serpentine body itself, but also to the restraint of the mesh tube. This makes the distal end of the active bending section easier to bend than the proximal end. As the tension of the traction rope increases, the proximal end of the active bending section can also bend, thereby enabling the active bending section to achieve a form in which the distal end bends first and the proximal end bends later. This bending form helps to reduce the area swept by the distal end of the active bending section during bending, which can reduce the difficulty of operation when used by doctors during surgery.

[0042] The following is combined with Figures 1 to 12 , the active bending section, insertion portion and endoscope provided by the present invention are described in detail through specific embodiments and their application scenarios.

[0043] The first aspect of this embodiment provides a detailed description of the active bending segment.

[0044] The active bending section 100 of this embodiment is used for endoscopes. Figure 1 As shown, the endoscope includes an insertion portion 300 and a handle 400. The insertion portion 300 is used to be inserted into the cavity, and the handle 400 is provided with an operating member for the convenience of the doctor's operation. The insertion portion 300 has an active bending section 100 and a passive bending section 200. The active bending section 100 is located at the distal end, and the passive bending section 200 is located at the proximal end. Figure 1As shown. An instrument tube is also provided within the insertion portion 300 for inserting instruments. The distal end surface of the active bending section 100 is provided with a camera module and other structures. The active bending section 100 can be in an extended or bent state under the action of the traction rope. Figures 2 to 5 shows a schematic diagram of the active bending section 100 in a straightened state, Figure 11 FIG. 1 is a schematic diagram showing the active bending section 100 in a bent state.

[0045] The active bending section 100 of this embodiment includes a snake bone body 120, such as Figure 2 As shown. For example, the snake bone body 120 includes a plurality of snake bone units 121, and two adjacent snake bone units 121 are riveted together by rivets 122, as shown in FIG. Figure 2 As shown. Thus, under the action of the pulling force of the traction rope, the snake bone unit 121 can rotate and bend to achieve the bending action of the snake bone body 120. Not limited to this, the snake bone body 120 can also be formed by integral cutting.

[0046] In some embodiments, the active bending section 100 further includes a mesh tube 110, such as Figure 3 The mesh tube 110 is at least sleeved on the proximal end of the serpentine body 120 , so as to at least increase the bending resistance of the serpentine unit 121 on the proximal side of the serpentine body 120 through the mesh tube 110 . Figures 3 to 5 A schematic diagram is shown in which the mesh tube 110 is only provided at the proximal end of the snake bone body 120 .

[0047] Without limitation, the mesh tube 110 may also be provided on the entire snake bone body 120. When the mesh tube 110 is provided on the entire snake bone body 120, the hardness of the tube body 111 of the mesh tube 110 gradually increases from the distal end to the proximal end.

[0048] The active bending section 100 of the above embodiment includes a mesh tube 110, which is at least sleeved on the proximal end of the serpentine body 120. When the active bending section 100 is bent by controlling the traction rope, the serpentine unit 121 at the proximal end of the serpentine body 120 is not only subject to the resistance of the serpentine body 120 itself, but also subject to the constraint of the mesh tube 110, so that the bending resistance of the serpentine unit 121 on the proximal side of the serpentine body 120 is larger, and the serpentine unit 121 on the distal side of the serpentine body 120 is easier to bend than the serpentine unit 121 on the proximal side. As the tension of the traction rope increases, the serpentine unit 121 on the proximal side can also bend, thereby enabling the active bending section 100 to achieve the form of bending the distal end first and then bending the proximal end.

[0049] The distal end of the active bending segment 100 bends before the proximal end, which helps reduce the area swept by the distal end during bending. During surgery, for example, when a doctor needs to bend the active bending segment 100 from the superior renal calyx to the inferior renal calyx, this not only reduces the difficulty of the operation but also avoids kidney damage caused by excessive sweeping of the active bending segment 100 during bending. In other words, the active bending segment 100 of this embodiment solves the technical problem in related arts where the distal end of the active bending segment 100 sweeps a large area during bending, making the operation more difficult for the doctor.

[0050] In some embodiments, the network management system 110 includes a management body 111. Figure 8 As shown, the tube body 111 has a mounting channel 111a, which runs through the axial direction of the tube body 111. The mounting channel 111a is used to mount the snake bone body 120. For example, the tube body 111 has an axially running mounting channel 111a. When assembling, the tube body 111 can be sleeved on the proximal end of the snake bone body 120, as shown in FIG. Figure 3 shown.

[0051] In some embodiments, the tube body 111 is a mesh structure formed by wires. Specifically, the wall surface of the tube body 111 is a mesh structure. Exemplarily, the wires can be connected to each other by welding, weaving, bonding, etc. to form a mesh structure. Exemplarily, the wires of this embodiment are sheets with a certain width and length, and the wires are deformable. For example, the wires of this embodiment are stainless steel sheets. The use of sheet-like wires in this embodiment can not only reduce the influence of the mesh tube 110 on the radial dimensions of the insertion portion 300, but also avoid the mesh tube 110 from exerting too much restraining force on the proximal end of the serpentine body 120, which results in the problem of difficulty in bending the proximal end of the active bending section 100.

[0052] The pipe body 111 of this embodiment is a mesh structure, so that mesh holes 113 are formed on the mesh pipe 110. Figure 7 and Figure 10 When the mesh tube 110 is sleeved onto the proximal end of the serpentine body 120, the mesh holes 113 can reduce the rigidity of the mesh tube 110, thereby enhancing its deformability and preventing the mesh tube 110 from exerting excessive restraint on the proximal end of the serpentine body 120, which would otherwise cause difficulty in bending the proximal end of the active bending section 100.

[0053] In some embodiments, the wires include at least a first wire 111b and a second wire 111c, and the first wire 111b and the second wire 111c are woven together to form a mesh structure, such as Figures 6 to 10As shown. The first wire 111b and the second wire 111c are arranged in different directions so that the first wire 111b and the second wire 111c are woven together to form a mesh structure. The materials of the first wire 111b and the second wire 111c can be the same or different. The weaving of this embodiment means that the first wire 111b and the second wire 111c are crossed and interwoven with each other, such as Figures 6 to 10 shown.

[0054] For example, there are multiple first wires 111b and second wires 111c, and the first wires 111b and second wires 111c are tilted and distributed in opposite directions, such as Figures 6 to 8 As shown. Exemplarily, the plurality of first wires 111b are parallel to each other, and the plurality of second wires 111c are parallel to each other, and the first wires 111b and the second wires 111c are inclined in opposite directions. The first wires 111b and the second wires 111c are inclined relative to the axial direction of the snake bone body 120.

[0055] Exemplarily, there are multiple first wires 111b and second wires 111c, the first wires 111b are distributed along one of the transverse direction and the longitudinal direction, and the second wires 111c are distributed along the other of the transverse direction and the longitudinal direction, as shown in FIG. Figure 9 and Figure 10 shown.

[0056] The braided structure of the first and second wires 111b, 111c ensures the reliability of the connection between the first and second wires 111b, 111c. During the bending of the active bending section 100, the net tube 110 will also deform and bend. The braided structure of the net tube 110, formed by the first and second wires 111b, 111c, prevents the connection between the first and second wires 111b, 111c from becoming detached during repeated bending of the net tube 110, which could affect the bending performance of the active bending section 100.

[0057] In some embodiments, the length of the mesh tube 110 is the same as the length of the proximal end of the snake bone body 120. That is, the mesh tube 110 is only sleeved on the proximal end of the snake bone body 120, and the distal end of the snake bone body 120 is not provided with the mesh tube 110. Figure 3 shown.

[0058] For example, the distal end and proximal end of the serpent bone body 120 herein are defined by the middle of the serpent bone body 120 as the dividing line, with the portion distal to the dividing line being the distal end of the serpent bone body 120 and the portion proximal to the dividing line being the proximal end of the serpent bone body 120. Without limitation, the distal end and proximal end of the serpent bone body 120 may also be defined in other ways.

[0059] In some embodiments, the length of the mesh tube 110 may be the same as the length of the entire snake body 120 , that is, the mesh tube 110 may be sleeved onto the entire snake body 120 .

[0060] In some embodiments, the hardness of the tube 111 gradually increases from the distal end to the proximal end. This gradually increasing hardness of the tube 111 from the distal end to the proximal end means that when subjected to the same force, the degree of deformation at the distal end of the tube 111 is greater than that at the proximal end of the tube 111. In other words, when subjected to the same force, the proximal end of the tube 111 is less likely to deform than the distal end of the tube 111.

[0061] In the solution of this embodiment, the hardness of the tube body 111 gradually increases from the distal end to the proximal end, so that the mesh tube 110 is not limited to being provided at the proximal end of the serpentine body 120, but can also be provided on the entire serpentine body 120. Specifically, when the mesh tube 110 is provided on the entire serpentine body 120, the hardness of the tube body 111 gradually increases from the distal end to the proximal end, so that the active bending section 100 forms a bending manner that gradually bends from the distal end to the proximal end, such as Figure 12 shown.

[0062] For example, the mesh 113 formed by weaving the first wire 111b and the second wire 111c together gradually decreases in size from the distal end to the proximal end. That is, the density of the first wire 111b and the second wire 111c gradually increases from the distal end to the proximal end, thereby gradually increasing the hardness of the tube 111 from the distal end to the proximal end.

[0063] Exemplarily, the distance between two adjacent first wires 111b or two adjacent second wires 111c gradually decreases from the distal end to the proximal end. Exemplarily, the width of the first wires 111b and / or the second wires 111c gradually increases from the distal end to the proximal end. All of the above solutions can achieve a gradual decrease in the size of the mesh 113 formed by the braiding of the first wires 111b and the second wires 111c from the distal end to the proximal end.

[0064] For example, the thickness of the first wire 111b and / or the second wire 111c gradually increases from the distal end to the proximal end. The above solution can also make the hardness of the tube body 111 gradually increase from the distal end to the proximal end.

[0065] In some embodiments, both ends of the tube 111 are welded to the snake unit 121. In some embodiments, the wire is made of stainless steel, which facilitates the welding connection between the tube 111 and the snake unit 121. Welding the tube 111 to the snake unit 121 prevents the ends of the tube 111 from warping, which could damage the outer covering 130. It also prevents displacement of the tube 111 after repeated bending of the active bending section 100.

[0066] In some embodiments, the welding portion between the tube body 111 and the snake bone unit 121 is formed as a welding portion 112, such as Figure 4 and Figure 5 As shown. Along the axial direction of the snake bone unit 121, the welding portion 112 extends from one end of the snake bone unit 121 to the other end. Figure 4 and Figure 5 That is, the welding between the tube body 111 and the snake unit 121 is not a point welding, but the welding portion 112 has a certain length in the axial direction of the snake unit 121, thereby ensuring the welding effect between the tube body 111 and the snake unit 121.

[0067] In some embodiments, the active bending section 100 further includes a skin 130, such as Figure 5 As shown, the skin 130 wraps around the mesh tube 110 and extends to the distal end of the serpentine body 120. In other words, the skin 130 covers the entire serpentine body 120. The covering effect of the skin 130 protects the serpentine body 120 and also creates a smooth surface for the active bending section 100.

[0068] In some embodiments, the portion of the snake bone body 120 where the mesh tube 110 is not provided has a thicker skin 130; the portion of the snake bone body 120 where the mesh tube 110 is provided has a thinner skin 130, such as Figure 5 As shown, the surface of the active bending section 100 can be made into a flat structure, which is convenient for inserting the active bending section 100 into the cavity.

[0069] The second aspect of this embodiment describes the insertion portion in detail.

[0070] The inserting portion 300 of this embodiment includes an active bending section 100, such as Figure 1 The active bending section 100 is the active bending section of any technical solution in this embodiment. The insertion portion 300 of this embodiment also includes a passive bending section 200, the distal end of the passive bending section 200 is connected to the proximal end of the active bending section 100, as shown. Figure 1 The structure of the passive bending section 200 may be the same as that in the prior art, and will not be described in detail here.

[0071] The insertion portion 300 of this embodiment has an active bending segment 100 according to any one of the technical solutions in this embodiment. When the active bending segment 100 is controlled to bend by a traction rope, the distal end of the active bending segment 100 can be bent first and the proximal end can bend later. This bending method is beneficial for reducing the area swept by the distal end of the active bending segment 100 during the bending process. When used by doctors during surgery, it can reduce the difficulty of operation and the probability of tissue damage.

[0072] The third aspect of this embodiment provides a detailed description of the endoscope.

[0073] The endoscope of this embodiment includes an insertion portion 300, such as Figure 1 The insertion portion 300 is the insertion portion of any technical solution in this embodiment. The endoscope of this embodiment also includes a handle 400, which is connected to the proximal end of the insertion portion 300. Figure 1 The handle 400 may be a structure of the prior art, which will not be described in detail here.

[0074] The endoscope system of this embodiment can be a digestive endoscope, bronchoscope, pyeloscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral mirror, laryngoscope, colposcope, laparoscope, arthroscope, etc. This embodiment does not impose any specific restrictions on the type of endoscope system.

[0075] The endoscope of this embodiment has an insertion portion according to any one of the technical solutions of this embodiment, which can reduce the difficulty of operation when used by doctors during surgery and can also reduce the probability of tissue damage.

[0076] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0077] Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present invention is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order, depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0078] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An active bending section for an endoscope, characterized in that: The active bending section comprises a mesh tube (110) and a snake bone body (120), wherein: The snake bone body (120) comprises a plurality of snake bone units (121), and two adjacent snake bone units (121) are connected and can be bent relative to each other to achieve a bending action of the snake bone body (120); The mesh tube (110) is at least sleeved on the outside of the proximal end of the serpentine body (120) so as to at least increase the bending resistance of the serpentine unit (121) on the proximal side of the serpentine body (120) through the mesh tube (110).

2. The active bending section according to claim 1, characterized in that: The mesh tube (110) comprises a tube body (111), the tube body (111) is a mesh structure formed of wires, and the tube body (111) has an installation channel (111a), the installation channel (111a) passes through the tube body (111) in an axial direction, and the installation channel (111a) is used to install the snake bone body (120).

3. The active bending section according to claim 2, characterized in that: The wires at least comprise a first wire (111b) and a second wire (111c), and the first wire (111b) and the second wire (111c) are woven together to form the mesh structure.

4. The active bending section according to claim 3, characterized in that: There are multiple first wires (111b) and multiple second wires (111c), the first wires (111b) and the second wires (111c) are distributed obliquely, and the first wires (111b) and the second wires (111c) have opposite inclination directions; Alternatively, there are multiple first wires (111b) and multiple second wires (111c), the first wires (111b) are distributed along one of the transverse direction and the longitudinal direction, and the second wires (111c) are distributed along the other of the transverse direction and the longitudinal direction.

5. The active bending segment according to any one of claims 2 to 4, characterized in that: The hardness of the tube body (111) gradually increases from the distal end to the proximal end.

6. The active bending section according to claim 5, characterized in that: From the distal end to the proximal end, the size of the mesh (113) formed by weaving the first wire (111b) and the second wire (111c) of the wire gradually decreases; Alternatively, the thickness of the first wire (111b) and / or the second wire (111c) gradually increases from the distal end to the proximal end.

7. The active bending section according to claim 2, characterized in that: The wire is made of stainless steel, and both ends of the tube body (111) are welded to the snake-bone unit (121).

8. The active bending section according to claim 7, characterized in that: The welding point between the tube body (111) and the snake-bone unit (121) forms a welding portion (112), and along the axial direction of the snake-bone unit (121), the welding portion (112) extends from one end of the snake-bone unit (121) to the other end.

9. An insertion portion, characterized in that: The invention comprises an active bending segment (100) and a passive bending segment (200), wherein the active bending segment (100) is the active bending segment according to any one of claims 1 to 8, and the proximal end of the active bending segment (100) is connected to the distal end of the passive bending segment (200).

10. An endoscope, characterized in that: The invention comprises an insertion part (300) and a handle (400), wherein the insertion part (300) is the insertion part according to claim 9, and the proximal end of the insertion part (300) is connected to the handle (400).

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