Skin assembly tool and skin assembly method

Abstract

The present invention discloses a skin assembly tool and a skin assembly method, and relates to the technical field of medical devices. The skin assembly tool of the present invention comprises a first core rod and a support member, wherein the first core rod is used to be inserted into the cavity of the active bending section and / or the passive bending section of the insertion part, and the first core rod abuts against the inner wall of the active bending section and / or the passive bending section; the support member has a first channel, and the skin to be assembled is placed in the first channel, and the skin to be assembled is made to fit with the wall of the first channel, and the skin to be assembled forms an assembly channel, and the assembly channel is used for the active bending section and / or the passive bending section to pass through. The skin assembly tool of the present invention can not only reduce the difficulty of assembling the skin, but also avoid damage to the skin through the action of the first core rod and the support member.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a skin assembly tool and a skin assembly method. Background Art

[0002] An endoscope is a commonly used medical device that can directly enter the human body for examination and provide doctors with sufficient diagnostic information. An endoscope usually includes: an insertion portion for inserting into the human body, a handle for controlling the bending of the front end of the insertion portion, and a display device for displaying the internal environment of the human body's natural cavity.

[0003] A camera module is provided at the distal end of the insertion part. After the insertion part is inserted into the cavity, the camera module can be used to observe the situation in the cavity. In the related art, the insertion part includes an active bending section and a passive bending section, and the active bending section is located at the distal end of the insertion part. In order to maintain the bending performance of the insertion part, the active bending section usually adopts a riveted snake bone, and the passive bending section is a spiral tube or an integrally cut snake bone. The surfaces of the active bending section and the passive bending section are also covered with a skin, so that the insertion part is formed into a smooth structure.

[0004] The skin has a certain elastic tightening force, and the inner diameter of the skin is usually smaller than the outer diameter of the insert, so that the skin will tightly wrap around the outer periphery of the insert after installation. However, the inventors found that when the skin is assembled outside the insert, there are problems such as greater assembly difficulty and easy damage to the skin, and it is difficult to ensure product quality. Summary of the invention

[0005] The invention discloses a skin assembly tool and a skin assembly method, so as to solve the technical problems in the related art that when assembling the skin outside the insertion part, the assembling is difficult and the skin is easily damaged.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] A first aspect of the present invention provides a skin assembly tool.

[0008] The skin assembly tool of the present invention is used for the insertion part of an endoscope, and the skin assembly tool comprises a first core rod and a support member, wherein the first core rod is used to be inserted into the cavity of the active bending section and / or the passive bending section of the insertion part, and the first core rod abuts against the inner wall of the active bending section and / or the passive bending section; the support member has a first channel, and the skin to be assembled is placed in the first channel, and the skin to be assembled is made to fit with the wall of the first channel, and the skin to be assembled forms an assembly channel, and the assembly channel is used for the active bending section and / or the passive bending section to pass through.

[0009] According to an optional embodiment, a handle is provided at one end of the first mandrel, and the other end of the first mandrel extends out of the active bending segment or the passive bending segment; or a handle is provided at one end of the first mandrel, and the other end of the first mandrel is located at the terminal serpentine segment of the active bending segment or the passive bending segment.

[0010] According to an optional embodiment, the skin assembly tool further includes a second mandrel, the second mandrel is partially inserted into the active bending section or the passive bending section, the second mandrel abuts against the first mandrel, and the radial dimension of the front end of the second mandrel satisfies: L 1 ≥L 2 , where L 1 is the radial dimension of the front end of the second mandrel, L 2 It is the radial dimension of the active bending section or the passive bending section after the skin to be assembled is covered on the outside of the active bending section or the passive bending section.

[0011] According to an optional embodiment, the second core rod includes an insertion segment and a support segment, the radial dimension of the insertion segment is smaller than the radial dimension of the support segment, and the insertion segment is used to be inserted into the active bending segment or the passive bending segment, and the surface of the support segment is a smooth structure.

[0012] According to an optional embodiment, a contact surface is formed at the connection between the insertion section and the support section, and when the second core rod is inserted into the active bending section or the passive bending section, the contact surface abuts against the front end face of the active bending section or the front end face of the passive bending section.

[0013] According to an optional embodiment, an avoidance groove is provided on the first core rod and the insertion section, and the avoidance groove is used to accommodate the rivet and the traction rope installation portion on the active bending section and / or the passive bending section, and make the rivet and the traction rope installation portion abut against the avoidance groove.

[0014] According to an optional embodiment, the support member includes a support tube and a joint, wherein the first channel is formed inside the support tube, and a negative pressure cavity is also formed outside the first channel, and the negative pressure cavity is connected to the first channel and the joint; the joint is used to connect the negative pressure generating device.

[0015] A second aspect of the present invention provides a skin assembly method.

[0016] The skin assembly method of the present invention is implemented based on the skin assembly tooling described in any one of the technical solutions of the present invention, and the skin assembly method includes the following steps: installing the skin to be assembled in the first channel of the support, and forming an assembly channel for the skin to be assembled; inserting the first core rod into the cavity of the active bending section and / or the passive bending section, and keeping the active bending section and / or the passive bending section in a straight state; passing the active bending section and / or the passive bending section through the assembly channel, and covering the skin to be assembled on the active bending section and / or the passive bending section.

[0017] According to an optional embodiment, after the skin to be assembled is installed in the first channel of the support, the following steps are also included: folding the two ends of the skin to be assembled and sleeved on the support tube, and forming the negative pressure cavity into a sealed cavity; starting the negative pressure generating device connected to the joint to keep the negative pressure cavity in a negative pressure state.

[0018] According to an optional embodiment, after the first core rod is inserted into the cavity of the active bending segment and / or the passive bending segment, the following steps are also included: inserting the insertion section of the second core rod into the front end of the active bending segment or the passive bending segment, and making the abutment surface of the second core rod abut against the front end surface of the active bending segment or the front end surface of the passive bending segment.

[0019] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0020] In the first aspect, the skin assembly tool of the present invention includes a first core rod. After the first core rod is inserted into the cavity of the active bending section and / or the passive bending section, the first core rod can play a supporting role to keep the active bending section and / or the passive bending section in a straight state. Even when a large force is applied to pass the active bending section and / or the passive bending section through the skin to be assembled, the active bending section and / or the passive bending section still remain in a straight state and are not prone to bending. Therefore, during the process of inserting the active bending section and / or the passive bending section into the skin to be assembled, the radial size of the active bending section and / or the passive bending section will not change, which is beneficial to reducing the difficulty of inserting the active bending section and / or the passive bending section.

[0021] Secondly, through the supporting effect of the first core rod, the active bending section and / or the passive bending section always remain straight during the process of inserting the active bending section and / or the passive bending section into the skin to be assembled. It can also avoid the problem that the end face of the serpentine section will pierce the skin after the active bending section and / or the passive bending section is bent, thereby improving the consistency of the product.

[0022] On the third aspect, the skin assembly tool of the present invention also includes a support member. The skin to be assembled is a flexible structure. After the skin to be assembled is placed in the first channel and fits against the wall of the first channel, the skin to be assembled can be in a taut state. The skin to be assembled can form an assembly channel, and the assembly channel is for the active bending section and / or the passive bending section to pass through, thereby further reducing the difficulty of inserting the active bending section and / or the passive bending section.

[0023] That is, the skin assembly tool of the present invention, through the functions of the first core rod and the support member, can not only reduce the difficulty of assembling the skin, but also avoid damage to the skin, thereby solving the technical problems in the related art of assembling the skin outside the insertion part, that is, the assembly is difficult and the skin is easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 is a schematic diagram of an endoscope according to an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of an active bending section in an extended state according to an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of an active bending section in a bending state according to an embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of the outer covering skin of the active bending section of the embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of the outer covering skin of the active bending section of another embodiment of the present application;

[0030] Figure 6 yes Figure 5 A magnified view of part A;

[0031] Figure 7 is a schematic diagram of a first mandrel according to an embodiment of the present application;

[0032] Figure 8 is a schematic diagram of a support member according to an embodiment of the present application;

[0033] Fig. 9 is a schematic diagram of the skin to be assembled on the support member in the embodiment of the present application;

[0034] Fig.10is a schematic diagram of a second mandrel according to an embodiment of the present application;

[0035] Fig.11 is a schematic diagram of the cooperation between the first mandrel and the active bending section in an embodiment of the present application;

[0036] Fig.12 is a schematic diagram of a skin to be assembled covering an active bending section in an embodiment of the present application;

[0037] Fig.13 is a schematic diagram of the cooperation between the first core rod and the active bending section in another embodiment of the present application;

[0038] Fig.14 is a schematic diagram of the cooperation between the first core rod and the active bending section in another embodiment of the present application;

[0039] Fig.15 It is a schematic diagram of the cooperation between the second mandrel and the active bending section of the present application;

[0040] Fig.16 It is a partial schematic diagram of the cooperation between the first mandrel and the second mandrel and the active bending section of the present application;

[0041] Fig.17 This is a schematic diagram of another embodiment of the present application in which a skin to be assembled is covered on an active bending section.

[0042] In the figure: 110, first core rod; 111, handle; 112, avoidance groove; 112a, first avoidance groove; 112b, second avoidance groove; 120, support member; 121, support tube; 121a, first channel; 121b, negative pressure cavity; 122, joint; 130, second core rod; 131, insertion section; 132, support section; 132a, chamfer; 133, abutment surface; 20, insertion part; 21, active bending section; 21a, rivet; 21b, traction rope mounting part; 21c, snake bone joint; 22, passive bending section; 30, skin to be assembled; 31, assembly channel; 32, first skin section; 33, second skin section; 34, connecting tube; 40, handle. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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".

[0046] In each embodiment of the present application, "front end" and "rear end" refer to each component in the use environment, relative to the insertion direction, wherein the end located in front of the insertion direction is designated as the "front end" and the end located behind the insertion direction is designated as the "rear end".

[0047] In the related art, both the active bending section and the passive bending section of the insertion part have bendable properties, and the stiffness of the active bending section is less than that of the passive bending section. Exemplarily, the active bending section includes a plurality of serpentine joints, and two adjacent serpentine joints are connected by rivets; the passive bending section is formed into a plurality of serpentine joints by integral cutting, and there is a gap between two adjacent serpentine joints. When the skin is assembled outside the insertion part, since the inner diameter of the skin is smaller than the outer diameter of the insertion part, during the assembly process, the operator needs to use a large force to insert the active bending section and the passive bending section into the skin. When the operator applies force to the active bending section and the passive bending section, the connection between the two adjacent serpentine joints is prone to rotation, and it is difficult for the insertion part to remain in a straight shape. When the connection between two adjacent serpentine joints rotates, the radial dimension of the insertion part changes, which increases the difficulty of assembling the skin. On the other hand, the skin is usually a thin rubber tube. When the connection between two adjacent serpentine joints rotates, the end face of the serpentine joint faces the skin. When force continues to be applied to the insertion part, not only is the resistance large, but the end face of the serpentine joint can easily puncture the skin, affecting product quality.

[0048] To this end, the present application provides a skin assembly tool, which includes a support member, through which the skin of the flexible structure can be kept in a taut state to form an assembly channel for the active bending section and / or the passive bending section to pass through; in addition, the skin assembly tool also includes a first core rod, after the first core rod is inserted into the cavity of the active bending section and / or the passive bending section, the active bending section and / or the passive bending section can always remain in a straight state. During the skin assembly process, there will be no problems of greater assembly difficulty and easy damage to the skin due to the bending of the active bending section and / or the passive bending section.

[0049] The following is combined with Figures 1 to 17 , the skin assembly tooling and skin assembly method provided by the present application are described in detail through specific embodiments and their application scenarios.

[0050] The first aspect of this embodiment provides a detailed description of the skin assembly tooling.

[0051] The skin assembly tool of this embodiment is used for the insertion portion 20 of the endoscope. Specifically, it is used to attach the skin outside the active bending section 21 and / or the passive bending section 22 of the insertion portion 20. That is, the skin assembly tool of this embodiment can be used to assemble the skin outside the active bending section 21, or to assemble the skin outside the passive bending section 22, or to assemble the skin outside the active bending section 21 and the passive bending section 22.

[0052] Figure 1 Figure 2 shows the overall schematic diagram of the endoscope. Figure 1 As shown, the endoscope includes an insertion portion 20 and a handle 40. The insertion portion 20 is used to be inserted into the cavity, and the handle 40 is provided with an operating member for the convenience of the doctor's operation. The insertion portion 20 has an active bending section 21 and a passive bending section 22. The active bending section 21 is located at the distal end, and the passive bending section 22 is located at the proximal end. Figure 1 As shown. The insertion part 20 is also provided with an instrument tube for inserting instruments. The distal end surface of the active bending section 21 is provided with a camera module and other structures. The active bending section 21 can be in a straight state or a bent state under the action of the traction rope, such as Figure 2 or Figure 3 shown.

[0053] The endoscope system of this embodiment may be a digestive endoscope, a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. This embodiment does not specifically limit the type of the endoscope system.

[0054] The following is a description of the skin assembly tooling of this embodiment being used to assemble the skin outside the active bending section 21 as an example.

[0055] like Figure 2As shown, the active bending section 21 includes a plurality of serpentine joints 21c, and two adjacent serpentine joints 21c are riveted together by rivets 21a.

[0056] For example, the outer skin of the active bending section 21 may be an integral structure, such as Figure 4 shown.

[0057] Exemplarily, the skin outside the active bending section 21 may also be a segmented structure. That is, the active bending section 21 includes a first skin section 32 and a second skin section 33, and the first skin section 32 and the second skin section 33 are connected by a connecting pipe 34, such as Figure 5 and Figure 6 As shown. Exemplarily, the connecting tube 34 is made of polymer material, so that the connecting tube 34 can be fused and connected with the first skin segment 32 and the second skin segment 33. Exemplarily, the first skin segment 32 is located at the distal end of the active bending segment 21, and the second skin segment 33 is located at the proximal end of the active bending segment 21, as shown in FIG. Figure 5 and Figure 6 In some embodiments, the hardness of the first skin segment 32 is less than that of the second skin segment 33. For example, the thickness of the first skin segment 32 is less than that of the second skin segment 33, or the number of layers of the first skin segment 32 is less than that of the second skin segment 33.

[0058] The hardness of the first skin segment 32 is less than that of the second skin segment 33, so that the active bending segment 21 can form a bending mode in which the distal end bends first and the proximal end bends later, so as to reduce the area swept by the active bending segment 21 when bending and reduce the difficulty of bending the active bending segment 21 in the body.

[0059] The skin assembly tool of the present embodiment can be used to connect an integral skin to the outer surface of the active bending section 21 , and can also be used to connect a split first skin section 32 and a second skin section 33 to the outer surface of the active bending section 21 .

[0060] The skin assembly tool of this embodiment includes a first core rod 110, such as Figure 7 As shown. The first core rod 110 can be a solid structure or a hollow structure. The first core rod 110 has a relatively high hardness and is not easily deformed. Exemplarily, the first core rod 110 is made of materials such as stainless steel, titanium alloy, engineering plastic, nickel-titanium alloy, and ceramic. The outer diameter of the first core rod 110 matches the inner diameter of the active bending segment 21, so that after the first core rod 110 is inserted into the cavity of the active bending segment 21, the first core rod 110 can abut against the inner wall of the active bending segment 21. The first core rod 110 abuts against the inner wall of the active bending segment 21, so that the two adjacent snake bone nodes 21c of the active bending segment 21 cannot rotate relative to each other, that is, the active bending segment 21 cannot bend.

[0061] Figure 11~Figure 17A schematic diagram showing the first mandrel 110 being inserted into the active bending section 21 is shown.

[0062] In the skin assembly tooling of the present embodiment, after the first core rod 110 is inserted into the cavity of the active bending segment 21, the first core rod 110 can support the active bending segment 21, so that the active bending segment 21 remains straight. Even when a large force is applied to pass the active bending segment 21 through the skin 30 to be assembled, the active bending segment 21 still remains straight and is not prone to bending. Therefore, during the process of inserting the active bending segment 21 into the skin 30 to be assembled, the radial dimension of the active bending segment 21 will not change, which helps to reduce the difficulty of inserting the active bending segment 21.

[0063] On the other hand, through the supporting effect of the first core rod 110, the active bending section 21 always remains straight during the process of inserting the active bending section 21 into the skin 30 to be assembled. It can also avoid the problem that the end face of the serpentine joint 21c will pierce the skin after the active bending section 21 is bent, thereby improving the consistency of the product.

[0064] The skin assembly tool of this embodiment also includes a support member 120, such as Figure 8 The support member 120 is used to expand the skin 30 to be assembled, that is, to expand the inner diameter of the skin 30 to be assembled, so that the active bending section 21 is easy to insert into the skin 30 to be assembled.

[0065] In some embodiments, the support member 120 has a first channel 121a, the skin 30 to be assembled is placed in the first channel 121a, and the skin 30 to be assembled is made to fit with the wall of the first channel 121a, so that the skin 30 to be assembled can form an assembly channel 31, such as Figure 8 and Fig. 9 As shown. The assembly channel 31 can be used for the active bending section 21 and / or the passive bending section 22 to pass through. Exemplarily, the inner diameter of the first channel 121a is slightly larger than the outer diameter of the active bending section 21, so that after the skin 30 to be assembled is attached to the wall of the first channel 121a, the assembly channel 31 formed by the skin 30 to be assembled can be slightly larger than the outer diameter of the active bending section 21, so as to facilitate the insertion of the active bending section 21 into the assembly channel 31.

[0066] Generally, the skin 30 to be assembled is a flexible structure, and in a natural state, it is impossible to form a straight channel for the active bending section 21 to be inserted. The skin assembly tool of this embodiment also includes a support member 120, and the support member 120 has a first channel 121a. After the skin 30 to be assembled is placed in the first channel 121a and fits against the wall of the first channel 121a, the skin 30 to be assembled can be in a taut state, and the skin 30 to be assembled can form an assembly channel 31, and the assembly channel 31 is for the active bending section 21 to pass through, thereby reducing the difficulty of inserting the active bending section 21.

[0067] In the above technical solution, through the action of the first core rod 110 and the support member 120, when assembling the skin, not only the difficulty of assembling the skin can be reduced, but also damage to the skin can be avoided, thereby solving the technical problems in the related art that when assembling the skin outside the insertion part 20, there is a greater difficulty in assembly and the skin is easily damaged.

[0068] In some embodiments, a handle 111 is provided at one end of the first mandrel 110, and an active bending section 21 extends out from the other end of the first mandrel 110. Fig.11 and Fig.12 As shown. Exemplarily, along the insertion direction of the active bending section 21 (eg Fig. 9 As shown by the arrow in the middle, the handle 111 is located at the rear end of the first mandrel 110, and the front end of the first mandrel 110 extends out of the active bending section 21, as shown in FIG. Fig.11 and Fig.12 In the above technical solution, a handle 111 is provided at the rear end of the first mandrel 110, which not only facilitates the application of force to the active bending section 21, but also allows the handle 111 to limit the position, so that the first mandrel 110 is not easy to be separated from the active bending section 21; the front end of the first mandrel 110 extends out of the active bending section 21, which can ensure that the first mandrel 110 can support the entire active bending section 21.

[0069] In some embodiments, a handle 111 is provided at one end of the first mandrel 110, and the other end of the first mandrel 110 is located at the last snake bone joint 21c of the active bending section 21. Fig.13 As shown. Exemplarily, along the insertion direction of the active bending section 21, the handle 111 is located at the rear end of the first mandrel 110, and the front end of the first mandrel 110 is located at the last snake bone section 21c of the active bending section 21, as shown in FIG. Fig.13 In the above technical solution, a handle 111 is provided at the rear end of the first mandrel 110, which is not only convenient for applying force to the active bending section 21, but also can be limited by the handle 111, so that the first mandrel 110 is not easy to be separated from the active bending section 21; the front end of the first mandrel 110 is located at the last snake bone section 21c of the active bending section 21, that is, the front end of the first mandrel 110 does not extend out of the active bending section 21, which can also ensure that the first mandrel 110 can play a supporting role for the entire active bending section 21.

[0070] In some embodiments, the skin assembly tool further includes a second mandrel 130, such as Fig.10 The second mandrel 130 is partially inserted into the active bending section 21, and the second mandrel 130 abuts against the first mandrel 110, as shown. Figure 14~Figure 17 Exemplarily, the second mandrel 130 is located at an end opposite to the handle 111 , and the second mandrel 130 is inserted from the front end of the active bending section 21 , and the second mandrel 130 is brought into contact with the first mandrel 110 .

[0071] The inventors found in their research that the active bending section 21 has a bendable property, and in the process of inserting the first mandrel 110 from the rear end to the front end of the active bending section 21, the active bending section 21 may also bend, which is not conducive to the insertion of the first mandrel 110. The skin assembly tool of this embodiment inserts the first mandrel 110 and the second mandrel 130 from both ends of the active bending section 21, and makes the second mandrel 130 abut against the first mandrel 110, which not only reduces the difficulty of inserting the mandrel into the active bending section 21 and improves the insertion efficiency of the mandrel, but also ensures that the first mandrel 110 and the second mandrel 130 can support the entire active bending section 21.

[0072] In some embodiments, the radial dimension of the front end of the second mandrel 130 satisfies: L 1 ≥L 2 Among them, L 1 is the radial dimension of the front end of the second mandrel 130, L 2 It is the radial dimension of the active bending section 21 after the skin 30 to be assembled is covered on the active bending section 21. The radial dimension of the front end of the second mandrel 130 is too large to be inserted into the active bending section 21, so the insertion length of the second mandrel 130 can be limited, so that the second mandrel 130 can be partially inserted into the active bending section 21.

[0073] The inventors also found in the research that when the first core rod 110 is inserted only into the active bending section 21, no matter the front end of the first core rod 110 extends out of the active bending section 21 or the front end of the first core rod 110 is located at the last serpentine section 21c of the active bending section 21, the end face of the last serpentine section 21c of the active bending section 21 is facing the insertion direction, and the end face of the last serpentine section 21c is prone to pierce the skin 30 to be assembled.

[0074] In the scheme of this embodiment, the radial dimension of the front end of the second core rod 130 is larger, specifically, larger than the radial dimension of the active bending section 21 after the skin 30 to be assembled is covered on the active bending section 21. The end face of the last snake bone section 21c of the active bending section 21 can be shielded by the front end of the second core rod 130 to avoid the end face of the last snake bone section 21c facing the insertion direction, thereby avoiding the problem of the end face of the last snake bone section 21c piercing the skin 30 to be assembled. On the other hand, when the active bending section 21 is inserted into the assembly channel 31, the front end of the second core rod 130 can be used to appropriately expand the assembly channel 31, which can not only reduce the difficulty of inserting the active bending section 21 into the assembly channel 31, but also further avoid the snake bone section 21c and / or the rivet 21a on the active bending section 21 from piercing the skin 30 to be assembled.

[0075] In some embodiments, the second mandrel 130 includes an insertion section 131 and a support section 132. Fig.10As shown. Exemplarily, the insertion section 131 and the support section 132 may be an integrated structure or a split structure. The radial dimension of the insertion section 131 is smaller than the radial dimension of the support section 132, and the insertion section 131 is used to be inserted into the active bending section 21, as shown in FIG. Fig.10 The surface of the support segment 132 is a smooth structure, so when the support segment 132 is used to expand the assembly channel 31, it can be avoided that the support segment 132 causes damage to the skin 30 to be assembled.

[0076] In some embodiments, the front end of the support section 132 is provided with a rounded shape 132a, such as Fig.10 When the support section 132 is inserted into the assembly channel 31, the rounded portion 132a can play a guiding role, further reducing the difficulty of insertion.

[0077] In some embodiments, the connection between the insertion section 131 and the support section 132 forms an abutment surface 133, such as Fig.10 As shown. When the second mandrel 130 is inserted into the active bending section 21, the abutting surface 133 abuts against the front end face of the active bending section 21. The second mandrel 130 can be limited by the abutting surface 133 against the front end face of the active bending section 21. In addition, when the abutting surface 133 abuts against the front end face of the active bending section 21, even if a step surface is formed between the support section 132 and the active bending section 21, since the step surface is not directly facing the insertion direction, there is no problem of the step surface causing damage to the skin 30 to be assembled.

[0078] In some embodiments, the first mandrel 110 is provided with an avoidance groove 112, such as Figure 7 The insertion section 131 is provided with an avoidance groove 112, as shown in FIG. Fig.10 As shown. The avoidance groove 112 is used to accommodate the rivet 21a and the traction rope installation part 21b on the active bending section 21, and the rivet 21a and the traction rope installation part 21b are abutted against the avoidance groove 112. Exemplarily, the avoidance groove 112 includes a first avoidance groove 112a and a second avoidance groove 112b, the first avoidance groove 112a is used to accommodate the rivet 21a, and the rivet 21a is abutted against the first avoidance groove 112a; the second avoidance groove 112b is used to accommodate the traction rope installation part 21b, and the traction rope installation part 21b is abutted against the second avoidance groove 112b, as shown. Figure 7 , Figure 10~Figure 17 shown.

[0079] The rivet 21a protrudes from the inner wall of the serpentine joint 21c, and the traction rope mounting portion 21b is recessed toward the cavity direction of the serpentine joint 21c. In the scheme of this embodiment, an avoidance groove 112 is provided, and the rivet 21a and the traction rope mounting portion 21b on the active bending segment 21 are abutted against the avoidance groove 112, so that in the circumferential direction of the first core rod 110 and the insertion segment 131, the support points of the first core rod 110 and the insertion segment 131 on the active bending segment 21 can be increased, thereby improving the support performance of the first core rod 110 and the insertion segment 131.

[0080] In some embodiments, the support member 120 includes a support tube 121, such as Figure 8 A first channel 121a is formed inside the support tube 121. Figure 8 After the skin 30 to be assembled is placed in the first channel 121a, the two ends of the skin 30 to be assembled can be folded over the two ends of the support tube 121, so that the skin 30 to be assembled fits the wall surface of the first channel 121a, and the skin 30 to be assembled forms an assembly channel 31, as shown in FIG. Fig. 9 shown.

[0081] In some embodiments, the front end of the active bending section 21 can be guided into the assembly channel 31 by a guide wire.

[0082] In some embodiments, the support member 120 further includes a joint 122, such as Figure 8 The connector 122 is used to connect the negative pressure generating device. A negative pressure cavity 121b is formed outside the first channel 121a, and the negative pressure cavity 121b is connected to the first channel 121a and the connector 122. Figure 8 As shown. Exemplarily, a through hole is provided on the wall surface of the first channel 121a, so that the first channel 121a and the negative pressure cavity 121b can be connected through the through hole.

[0083] The skin 30 to be assembled is placed in the first channel 121a, and the two ends of the skin 30 to be assembled are folded over the two ends of the support tube 121, so that the negative pressure cavity 121b can be formed into a sealed cavity, and a negative pressure environment can be formed in the negative pressure cavity 121b through the suction action of the negative pressure generating device, and the air between the skin 30 to be assembled and the wall of the first channel 121a enters the negative pressure cavity 121b, so that the skin 30 to be assembled and the wall of the first channel 121a can be more closely fitted, and the size of the assembly channel 31 can be appropriately increased to expand the skin 30 to be assembled, and the difficulty of inserting the active bending section 21 can be further reduced.

[0084] It can be known that the skin assembly tooling of this embodiment is used to assemble the skin outside the passive bending section 22, or to assemble the skin outside the active bending section 21 and the passive bending section 22 at the same time, and has the same or similar structure, which will not be repeated here.

[0085] The second aspect of this embodiment describes the skin assembly method in detail.

[0086] Similarly, the following description will be made by taking the skin assembly method of this embodiment for assembling the skin outside the active bending section 21 as an example.

[0087] The skin assembly method of this embodiment is implemented based on the skin assembly tooling of any technical solution of this embodiment. The skin assembly method of this embodiment includes the following steps:

[0088] Step S100: Install the skin 30 to be assembled in the first channel 121a of the support 120, and form an assembly channel 31 for the skin 30 to be assembled, such as Fig. 9 shown.

[0089] Step S200: insert the first mandrel 110 into the cavity of the active bending section 21, and keep the active bending section 21 in a straight state. Fig.11 or Fig.13 shown.

[0090] Step S300: Pass the active bending section 21 through the assembly channel 31, and cover the skin 30 to be assembled on the active bending section 21. Fig.12 Exemplarily, after the active bending section 21 passes through the assembly channel 31, the skin 30 to be assembled is removed from the support 120, so that the skin 30 to be assembled can be covered on the active bending section 21, and then the active bending section 21 covered with the skin can be taken out from the first channel 121a.

[0091] It is known that the first core rod 110 may be inserted into the cavity of the active bending section 21 first, and then the skin 30 to be assembled may be installed in the first channel 121a of the support member 120, that is, the order of step S100 and step S200 may be interchanged.

[0092] The skin assembly method of the present embodiment fixes the skin 30 to be assembled and also increases the hardness of the active bending section 21 by means of the first core rod 110, thereby not only reducing the difficulty of assembling the skin but also preventing damage to the skin when assembling the skin, thereby solving the technical problems in the related art of assembling the skin outside the insertion part, that is, the difficulty of assembly is large and the skin is easily damaged.

[0093] In some embodiments, after the skin 30 to be assembled is installed in the first channel 121a of the support member 120, the following steps are also included: the two ends of the skin 30 to be assembled are folded and sleeved on the support tube 121, and the negative pressure cavity 121b is formed into a sealed cavity. The negative pressure generating device connected to the joint 122 is started to keep the negative pressure cavity 121b in a negative pressure state. The suction force of the negative pressure generating device can make the skin 30 to be assembled fit more closely with the wall surface of the first channel 121a, and the size of the assembly channel 31 can be appropriately increased, which plays a role in expanding and supporting the skin 30 to be assembled, and can further reduce the difficulty of inserting the active bending section 21.

[0094] Exemplarily, after the active bending section 21 passes through the assembly channel 31, the negative pressure generating device is turned off, so that the skin 30 to be assembled can be covered on the active bending section 21, and then the active bending section 21 covered with the skin can be taken out from the first channel 121a.

[0095] In some embodiments, after the first mandrel 110 is inserted into the cavity of the active bending section 21, the following steps are further included: inserting the insertion section 131 of the second mandrel 130 into the front end of the active bending section 21, and making the abutting surface 133 of the second mandrel 130 abut against the front end surface of the active bending section 21, such as Fig.15 shown.

[0096] In the scheme of this embodiment, by inserting the second core rod 130 at the front end of the active bending section 21, on the first hand, the first core rod 110 and the second core rod 130 are respectively inserted from both ends of the active bending section 21, which can reduce the difficulty of inserting the first core rod 110; on the second hand, the abutment surface 133 abuts against the front end surface of the active bending section 21, which can avoid the problem of the front end surface of the active bending section 21 piercing the skin 30 to be assembled; on the third hand, the front end of the second core rod 130 can appropriately expand the assembly channel 31, which can reduce the difficulty of inserting the active bending section 21 into the assembly channel 31, and at the same time can further avoid the snake bone node 21c and / or the rivet 21a on the active bending section 21 from piercing the skin 30 to be assembled.

[0097] It can be known that the skin assembly method of this embodiment is used to assemble the skin outside the passive bending section 22, or to assemble the skin outside the active bending section 21 and the passive bending section 22 at the same time. The same or similar method is used and will not be repeated here.

[0098] 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.

[0099] 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.

[0100] 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 skin assembly tool for an insertion portion (20) of an endoscope, characterized in that: The skin assembly tool comprises a first core rod (110) and a support member (120), wherein: The first core rod (110) is used to be inserted into the cavity of the active bending section (21) and / or the passive bending section (22) of the insertion portion (20), and the first core rod (110) abuts against the inner wall of the active bending section (21) and / or the passive bending section (22); The support member (120) has a first channel (121a), the skin to be assembled (30) is placed in the first channel (121a), and the skin to be assembled (30) is made to fit with the wall surface of the first channel (121a), the skin to be assembled (30) forms an assembly channel (31), and the assembly channel (31) is used for the active bending section (21) and / or the passive bending section (22) to pass through; The skin assembly tool also includes a second core rod (130), wherein the second core rod (130) is partially inserted into the active bending section (21) or the passive bending section (22), and the second core rod (130) abuts against the first core rod (110).

2. The skin assembly tool according to claim 1, characterized in that: One end of the first mandrel (110) is provided with a handle (111), and the other end of the first mandrel (110) extends out of the active bending section (21) or the passive bending section (22); or, A handle (111) is provided at one end of the first mandrel (110), and the other end of the first mandrel (110) is located at the terminal serpentine segment (21c) of the active bending segment (21) or the passive bending segment (22).

3. The skin assembly tool according to claim 1 or 2, characterized in that: The radial dimension of the front end of the second core rod (130) satisfies: L1≥L2, wherein: L1 is the radial dimension of the front end of the second core rod (130), L2 is the radial dimension of the active bending section (21) or the passive bending section (22) after the skin (30) to be assembled is covered on the outside of the active bending section (21) or the passive bending section (22).

4. The skin assembly tool according to claim 3, characterized in that: The second core rod (130) comprises an insertion section (131) and a support section (132); the radial dimension of the insertion section (131) is smaller than the radial dimension of the support section (132); the insertion section (131) is used to be inserted into the active bending section (21) or the passive bending section (22); and the surface of the support section (132) is a smooth structure.

5. The skin assembly tool according to claim 4, characterized in that: A contact surface (133) is formed at the connection between the insertion section (131) and the support section (132); when the second core rod (130) is inserted into the active bending section (21) or the passive bending section (22), the contact surface (133) contacts the front end surface of the active bending section (21) or the front end surface of the passive bending section (22).

6. The skin assembly tool according to claim 4, characterized in that: The first mandrel (110) and the insertion section (131) are provided with an avoidance groove (112), the avoidance groove (112) being used to accommodate a rivet (21a) and a traction rope mounting portion (21b) on the active bending section (21) and / or the passive bending section (22), and to make the rivet (21a) and the traction rope mounting portion (21b) abut against the avoidance groove (112).

7. The skin assembly tool according to claim 1, characterized in that: The support member (120) comprises a support tube (121) and a joint (122), wherein: The first channel (121a) is formed inside the support tube (121), and a negative pressure cavity (121b) is also formed outside the first channel (121a), and the negative pressure cavity (121b) is in communication with the first channel (121a) and the joint (122); The connector (122) is used to connect a negative pressure generating device.

8. A skin assembly method, characterized in that: The skin assembly tool is implemented based on any one of claims 1 to 7, and the skin assembly method comprises the following steps: Installing the skin to be assembled (30) in the first channel (121a) of the support member (120), and forming an assembly channel (31) with the skin to be assembled (30); Inserting a first mandrel (110) into the cavity of the active bending section (21) and / or the passive bending section (22), and partially inserting a second mandrel (130) into the active bending section (21) or the passive bending section (22), so that the second mandrel (130) abuts against the first mandrel (110), and the active bending section (21) and / or the passive bending section (22) remain in a straight state; The active bending section (21) and / or the passive bending section (22) are passed through the assembly channel (31), and the skin (30) to be assembled is covered on the active bending section (21) and / or the passive bending section (22).

9. The skin assembly method according to claim 8, characterized in that: The support member (120) comprises a support tube (121) and a joint (122); the first channel (121a) is formed inside the support tube (121); a negative pressure cavity (121b) is formed outside the first channel (121a); ​​the negative pressure cavity (121b) is in communication with the first channel (121a) and the joint (122); the joint (122) is used to connect to a negative pressure generating device; After the skin (30) to be assembled is installed in the first channel (121a) of the support member (120), the following steps are also included: Folding the two ends of the to-be-assembled skin (30) and sleeve-connecting them to the support tube (121), and forming the negative pressure cavity (121b) into a sealed cavity; The negative pressure generating device connected to the joint (122) is started to maintain the negative pressure chamber (121b) in a negative pressure state.

10. The skin assembly method according to claim 8, characterized in that: The second core rod (130) comprises an insertion section (131) and a support section (132); the radial dimension of the insertion section (131) is smaller than the radial dimension of the support section (132); a contact surface (133) is formed at the connection between the insertion section (131) and the support section (132); After the first core rod (110) is inserted into the cavity of the active bending section (21) and / or the passive bending section (22), the following steps are also included: The insertion section (131) of the second core rod (130) is inserted into the front end of the active bending section (21) or the passive bending section (22), and the abutment surface (133) of the second core rod (130) is abutted against the front end surface of the active bending section (21) or the front end surface of the passive bending section (22).

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