Skin assembly tool and skin assembly method

Abstract

Disclosed in the present invention are a skin assembly tool and a skin assembly method. The tool comprises a first mandrel and a support member, wherein the first mandrel is configured to be inserted into a lumen of an active bending section and / or a passive bending section of an insertion portion, and the first mandrel abuts against the inner wall of the active bending section and / or the passive bending section; and the support member has a first channel, and a skin to be assembled is placed in the first channel and attached to the wall surface of the first channel to form an assembly channel, the assembly channel being configured for the active bending section and / or the passive bending section to pass through. By means of the action of the first mandrel and the support member, the tool can not only reduce the assembly difficulty of the skin, but also prevent the skin from being damaged.

Description

Skin assembly tool and skin assembly method TECHNICAL FIELD

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

[0002] The distal end of the insertion part is provided with a camera module. After the insertion part is inserted into the cavity, the situation inside the cavity can be observed by using the camera module. 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 is usually a riveted snake bone, and the passive bending section is a spiral pipe or an integral cutting snake bone. The surfaces of the active bending section and the passive bending section are also covered with a skin to make the insertion part form a smooth structure.

[0003] The skin has a certain elastic tightening force. Usually, the inner diameter of the skin is smaller than the outer diameter of the insertion part, so that the skin tightly covers the outer periphery of the insertion part after installation. However, the inventors have found that when the skin is assembled outside the insertion part, there are problems of great assembly difficulty and easy damage to the skin, and the product quality is difficult to guarantee. SUMMARY

[0004] The present application discloses a skin assembly tool and a skin assembly method to solve the technical problems of great assembly difficulty and easy damage to the skin when assembling the skin outside the insertion part in the related art.

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

[0006] The skin assembly tool of the present application is used for the insertion part of an endoscope. The skin assembly tool includes a first core rod and a support. The first core rod is used for being 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 has a first channel. The skin to be assembled is placed in the first channel and is in contact with the wall surface of the first channel, so that the skin to be assembled forms an assembly channel. The assembly channel is used for the active bending section and / or the passive bending section to pass through.

[0007] The skin assembly method of the present application is realized based on the skin assembly tool of any one of the technical solutions in the present application. The skin assembly method includes the following steps: installing the skin to be assembled in the first channel of the support, and making the skin to be assembled form an assembly channel; inserting the first core rod into the cavity of the active bending section and / or the passive bending section, and making the active bending section and / or the passive bending section keep a straight state; passing the active bending section and / or the passive bending section through the assembly channel, and making the skin to be assembled cover the active bending section and / or the passive bending section.

[0008] The technical scheme adopted by the present application can achieve the following beneficial effects:

[0009] The skin assembly tool of the present application, 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, so that the active bending section and / or the passive bending section remain in a straight state, even when a larger 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, so that during the process of inserting the active bending section and / or the passive bending section into the skin to be assembled, the radial dimension of the active bending section and / or the passive bending section does not change, which is beneficial to reduce the difficulty of inserting the active bending section and / or the passive bending section.

[0010] Through the supporting role of the first core rod, the active bending section and / or the passive bending section always remain in a straight state during the process of inserting the active bending section and / or the passive bending section into the skin to be assembled, and the problem that the end face of the snake bone joint will puncture the skin after the active bending section and / or the passive bending section is bent can also be avoided, thereby improving the consistency of the product.

[0011] The skin assembly tool of the present application further comprises a support member, the skin to be assembled is in a flexible structure, and after the skin to be assembled is placed in the first channel and adheres to the wall surface of the first channel, the skin to be assembled can be in a taut state, and the skin to be assembled can form an assembly channel 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. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a schematic view of an endoscope according to an embodiment of the present application;

[0013] Fig. 2 is a schematic view of an active bending section in a straightened state according to an embodiment of the present application;

[0014] Fig. 3 is a schematic view of an active bending section in a bent state according to an embodiment of the present application;

[0015] Fig. 4 is a schematic view of an active bending section with an outer covering skin according to an embodiment of the present application;

[0016] Fig. 5 is a schematic view of an active bending section with an outer covering skin according to another embodiment of the present application;

[0017] Fig. 6 is an enlarged view of portion A in Fig. 5;

[0018] Fig. 7 is a schematic view of a first core rod according to an embodiment of the present application;

[0019] Fig. 8 is a schematic view of a support member according to an embodiment of the present application;

[0020] Fig. 9 is a schematic view of a skin to be assembled assembled on a support member according to an embodiment of the present application;

[0021] Fig. 10 is a schematic view of a second mandrel according to an embodiment of the present application;

[0022] Fig. 11 is a schematic view of a first mandrel cooperating with an active bending section according to an embodiment of the present application;

[0023] Fig. 12 is a schematic view of a skin to be assembled on an active bending section according to an embodiment of the present application;

[0024] Fig. 13 is a schematic view of a first mandrel cooperating with an active bending section according to another embodiment of the present application;

[0025] Fig. 14 is a schematic view of a first mandrel cooperating with an active bending section according to another embodiment of the present application;

[0026] Fig. 15 is a schematic view of a second mandrel cooperating with an active bending section according to an embodiment of the present application;

[0027] Fig. 16 is a partial schematic view of a first mandrel and a second mandrel cooperating with an active bending section according to an embodiment of the present application;

[0028] Fig. 17 is a schematic view of a skin to be assembled on an active bending section according to another embodiment of the present application.

[0029] Fig. 110, first mandrel; 111, handle; 112, avoiding slot; 112a, first avoiding slot; 112b, second avoiding slot; 120, support; 121, support tube; 121a, first channel; 121b, negative pressure cavity; 122, joint; 130, second mandrel; 131, insertion section; 132, support section; 132a, rounding; 133, abutting surface; 20, insertion part; 21, active bending section; 21a, rivet; 21b, traction rope mounting part; 21c, snake bone section; 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

[0030] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. "And / or" means at least one of the connected objects, and the character " / " generally means that the front and rear associated objects are in an "or" relationship. "Proximal" and "distal" refer to the relative position of each component to the user in the use environment. "Front end" and "rear end" refer to the relative position of each component to the insertion direction in the use environment.

[0031] The skin assembly tool and the skin assembly method provided by the present application will be described in detail below in conjunction with Figs. 1 to 17 through specific embodiments and application scenarios.

[0032] The skin assembly tool of the embodiment is used for the insertion part 20 of the endoscope. Specifically, it is used for assembling the skin on the active bending section 21 and / or the passive bending section 22 of the insertion part 20.

[0033] FIG. 1 shows a schematic diagram of the endoscope. As shown in FIG. 1, the endoscope includes an insertion part 20 and a handle 40. The insertion part 20 has an active bending section 21 at the distal end and a passive bending section 22 at the proximal end, as shown in FIG. 1. An instrument tube is also provided in the insertion part 20, which is used for inserting an instrument. The distal end face of the active bending section 21 is provided with a camera module and other structures. The active bending section 21 can be in a straightened state or a bent state under the action of a traction cord, as shown in FIG. 2 or FIG. 3.

[0034] The endoscope system of the embodiment can be a digestive endoscope, a bronchoscope, a renal pelviscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasoscope, an oral mirror, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The type of the endoscope system is not specifically limited in the embodiment.

[0035] The skin assembly tool of the embodiment is used for assembling the skin on the active bending section 21.

[0036] As shown in FIG. 2, the active bending section 21 includes a plurality of snake bone joints 21c, and adjacent two snake bone joints 21c are riveted by a rivet 21a.

[0037] For example, the skin on the active bending section 21 can be of an integrated structure, as shown in FIG. 4.

[0038] For example, the skin on the active bending section 21 can also be of a segmented structure. That is, the skin on 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 tube 34, as shown in FIG. 5 and FIG. 6. For example, the connecting tube 34 is made of a high polymer material, so that the connecting tube 34 can be fusedly connected with the first skin section 32 and the second skin section 33. For example, the first skin section 32 is located at the distal end of the active bending section 21, and the second skin section 33 is located at the proximal end of the active bending section 21, as shown in FIG. 5 and FIG. 6. In some embodiments, the hardness of the first skin section 32 is less than that of the second skin section 33. For example, the thickness of the first skin section 32 is less than that of the second skin section 33, or the number of layers of the first skin section 32 is less than that of the second skin section 33.

[0039] The hardness of the first skin section 32 is less than that of the second skin section 33, so that the active bending section 21 can form a bending mode of bending the distal end first and the proximal end later, so as to reduce the area swept when the active bending section 21 is bent, and reduce the bending difficulty of the active bending section 21 in the body.

[0040] The skin assembly tool of the embodiment can be used to assemble the integral skin on the active bending section 21, and can also be used to assemble the first skin section 32 and the second skin section 33 on the active bending section 21.

[0041] The skin assembly tool of the embodiment includes a first mandrel 110, as shown in FIG. 7. The first mandrel 110 can be solid or hollow. The first mandrel 110 has a large hardness and is not easy to deform. For example, the first mandrel 110 is made of stainless steel, titanium alloy, engineering plastic, nickel-titanium alloy, ceramic, or the like. The outer diameter of the first mandrel 110 matches the inner diameter of the active bending section 21, so that after the first mandrel 110 is inserted into the cavity of the active bending section 21, the first mandrel 110 can abut against the inner wall of the active bending section 21. The abutment of the first mandrel 110 against the inner wall of the active bending section 21 prevents the adjacent two snake bone joints 21c of the active bending section 21 from rotating relative to each other, that is, the active bending section 21 cannot bend.

[0042] FIGS. 11-17 show schematic views of the insertion of the first mandrel 110 into the active bending section 21.

[0043] After the first mandrel 110 is inserted into the cavity of the active bending section 21, the first mandrel 110 can support the active bending section 21, so that the active bending section 21 remains straight. Even when a large force is applied to pass the active bending section 21 through the skin 30 to be assembled, the active bending section 21 still remains straight and is not easy to bend, so that the radial dimension of the active bending section 21 does not change during the insertion of the active bending section 21 into the skin 30 to be assembled, which is beneficial to reduce the difficulty of insertion of the active bending section 21.

[0044] On the other hand, due to the support of the first mandrel 110, the active bending section 21 always remains straight during the insertion of the active bending section 21 into the skin 30 to be assembled, and the problem that the end face of the snake bone joint 21c pierces the skin can also be avoided, so that the consistency of the product can be improved.

[0045] The skin assembly tool of the embodiment also includes a support 120, as shown in FIG. 8. The support 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 be inserted into the skin 30 to be assembled.

[0046] In some embodiments, the support 120 has a first channel 121a, the skin 30 to be assembled is placed in the first channel 121a and is in contact with the wall of the first channel 121a, so that the skin 30 to be assembled forms an assembly channel 31, as shown in FIGS. 8 and 9. The assembly channel 31 can be used for the active bending section 21 and / or the passive bending section 22 to pass through. For example, 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 in contact with the wall of the first channel 121a, the assembly channel 31 formed by the skin 30 to be assembled is 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.

[0047] Generally, the skin 30 to be assembled is flexible and cannot form a straight channel for the insertion of the active bending section 21 in a natural state. The skin assembly tool of the present embodiment further comprises a support 120, the support 120 has a first channel 121a, and after the skin 30 to be assembled is placed in the first channel 121a and is in contact with the wall of the first channel 121a, the skin 30 to be assembled is in a taut state, the skin 30 to be assembled can form an assembly channel 31, and the assembly channel 31 is used for the active bending section 21 to pass through, so as to reduce the difficulty of insertion of the active bending section 21.

[0048] In the above technical solution, through the action of the first mandrel 110 and the support 120, when the skin is assembled, not only can the assembly difficulty of the skin be reduced, but also the skin can be prevented from being damaged, and the technical problems of great assembly difficulty and easy damage of the skin when the skin is assembled outside the insertion part 20 in the related art are solved.

[0049] In some embodiments, one end of the first mandrel 110 is provided with a handle 111, and the other end of the first mandrel 110 protrudes out of the active bending section 21, as shown in FIGS. 11 and 12. For example, along the insertion direction of the active bending section 21 (as shown by the arrow in FIG. 9), the handle 111 is located at the rear end of the first mandrel 110, and the front end of the first mandrel 110 protrudes out of the active bending section 21, as shown in FIGS. 11 and 12. In the above technical solution, the handle 111 is arranged 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 limits the position of the first mandrel 110 through the handle 111, so that the first mandrel 110 is not easy to come off the active bending section 21; the front end of the first mandrel 110 protrudes out of the active bending section 21, which can ensure that the first mandrel 110 can support the entire active bending section 21.

[0050] In some embodiments, the first core rod 110 is provided with a handle 111 at one end, and the other end of the first core rod 110 is located at the last snake bone section 21c of the active bending section 21, as shown in FIG. 13. For example, along the insertion direction of the active bending section 21, the handle 111 is located at the rear end of the first core rod 110, and the front end of the first core rod 110 is located at the last snake bone section 21c of the active bending section 21, as shown in FIG. 13. In the above technical solution, the handle 111 is arranged at the rear end of the first core rod 110, which not only facilitates the application of force to the active bending section 21, but also limits the position of the handle 111, so that the first core rod 110 is not easy to be separated from the active bending section 21; the front end of the first core rod 110 is located at the last snake bone section 21c of the active bending section 21, that is, the front end of the first core rod 110 does not protrude from the active bending section 21, which also ensures that the first core rod 110 can support the entire active bending section 21.

[0051] In some embodiments, the skin assembly tool further comprises a second core rod 130, as shown in FIG. 10. The second core rod 130 is partially inserted into the active bending section 21, and the second core rod 130 abuts against the first core rod 110, as shown in FIGS. 14-17. For example, the second core rod 130 is located at the end opposite to the handle 111, and the second core rod 130 is inserted into the active bending section 21 from the front end of the active bending section 21, and the second core rod 130 abuts against the first core rod 110.

[0052] The inventors have found in research that the active bending section 21 has a bendable performance, and during the process of inserting the first core rod 110 from the rear end to the front end of the active bending section 21, the active bending section 21 may also be bent, which is not conducive to the insertion of the first core rod 110. The skin assembly tool of the present embodiment inserts the first core rod 110 and the second core rod 130 from the two ends of the active bending section 21 respectively, and makes the second core rod 130 abut against the first core rod 110, which not only reduces the difficulty of inserting the core rod into the active bending section 21 and improves the insertion efficiency of the core rod, but also ensures that the first core rod 110 and the second core rod 130 can support the entire active bending section 21.

[0053] In some embodiments, 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, and L2 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 core rod 130 is large, which cannot be inserted into the active bending section 21, so as to limit the insertion length of the second core rod 130, and realize the partial insertion of the second core rod 130 into the active bending section 21.

[0054] The inventor has also found in the research that, only when the first mandrel 110 is inserted into the active bending section 21, whether the front end of the first mandrel 110 protrudes out of the active bending section 21 or the front end of the first mandrel 110 is located at the terminal herringbone section 21c of the active bending section 21, the end face of the terminal herringbone section 21c of the active bending section 21 is opposite to the insertion direction, and the end face of the terminal herringbone section 21c is prone to puncture the to-be-assembled skin 30.

[0055] In the scheme of the embodiment, the radial dimension of the front end of the second mandrel 130 is larger, specifically larger than the radial dimension of the active bending section 21 after the to-be-assembled skin 30 is wrapped around the active bending section 21. The end face of the terminal herringbone section 21c of the active bending section 21 can be shielded by the front end of the second mandrel 130, so as to avoid that the end face of the terminal herringbone section 21c is opposite to the insertion direction and the end face of the terminal herringbone section 21c punctures the to-be-assembled skin 30. On the other hand, when the active bending section 21 is inserted into the assembly channel 31, the front end of the second mandrel 130 can appropriately expand the assembly channel 31, which not only reduces the difficulty of inserting the active bending section 21 into the assembly channel 31, but also further avoids that the herringbone sections 21c and / or the rivets 21a on the active bending section 21 puncture the to-be-assembled skin 30.

[0056] In some embodiments, the second mandrel 130 includes an insertion section 131 and a support section 132, as shown in FIG. 10. The insertion section 131 and the support section 132 can 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. 10. The surface of the support section 132 is a smooth structure, so that when the support section 132 is used to expand the assembly channel 31, damage to the to-be-assembled skin 30 can be avoided.

[0057] In some embodiments, the front end of the support section 132 is provided with a rounded corner 132a, as shown in FIG. 10. When the support section 132 is inserted into the assembly channel 31, the rounded corner 132a can play a guiding role, further reducing the insertion difficulty.

[0058] In some embodiments, the connection between the insertion section 131 and the support section 132 forms an abutting surface 133, as shown in FIG. 10. 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. By abutting the abutting surface 133 against the front end face of the active bending section 21, the second mandrel 130 can be limited. In addition, when the abutting surface 133 abuts against the front end face of the active bending section 21, even if a stepped surface is formed between the support section 132 and the active bending section 21, since the stepped surface is not opposite to the insertion direction, the problem that the stepped surface damages the to-be-assembled skin 30 does not exist.

[0059] In some embodiments, the first core rod 110 is provided with a relief groove 112, as shown in FIG. 7. The insertion section 131 is also provided with a relief groove 112, as shown in FIG. 10. The relief groove 112 is used to accommodate the rivet 21a and the traction rope mounting portion 21b on the active bending section 21, and to make the rivet 21a and the traction rope mounting portion 21b abut against the relief groove 112. For example, the relief groove 112 includes a first relief groove 112a and a second relief groove 112b. The first relief groove 112a is used to accommodate the rivet 21a, and the rivet 21a abuts against the first relief groove 112a. The second relief groove 112b is used to accommodate the traction rope mounting portion 21b, and the traction rope mounting portion 21b abuts against the second relief groove 112b, as shown in FIGS. 7, 10-17.

[0060] The rivet 21a protrudes from the inner wall of the snake bone section 21c, and the traction rope mounting portion 21b is recessed towards the cavity of the snake bone section 21c. In the scheme of the present embodiment, by providing the relief groove 112, and making the rivet 21a and the traction rope mounting portion 21b on the active bending section 21 abut against the relief groove 112, the support points of the first core rod 110 and the insertion section 131 on the active bending section 21 in the circumferential direction of the first core rod 110 and the insertion section 131 can be increased, and the support performance of the first core rod 110 and the insertion section 131 can be improved.

[0061] In some embodiments, the support member 120 includes a support tube 121, as shown in FIG. 8. The support tube 121 is internally formed with a first channel 121a, as shown in FIG. 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 on the two ends of the support tube 121, so that the skin 30 to be assembled is attached to the wall of the first channel 121a, and the skin 30 to be assembled forms an assembly channel 31, as shown in FIG. 9.

[0062] In some embodiments, the front end of the active bending section 21 can be guided into the assembly channel 31 through a guide wire.

[0063] In some embodiments, the support member 120 further includes a connector 122, as shown in FIG. 8. The connector 122 is used to connect a negative pressure generating device. The first channel 121a is further formed with a negative pressure cavity 121b, and the negative pressure cavity 121b is in communication with the first channel 121a and the connector 122, as shown in FIG. 8. For example, a through hole is provided on the wall of the first channel 121a, so that the first channel 121a and the negative pressure cavity 121b are in communication through the through hole.

[0064] The to-be-assembled skin 30 is placed in the first channel 121a, and the two ends of the to-be-assembled skin 30 are folded on the two ends of the support pipe 121, so that the negative pressure cavity 121b is formed into a sealed cavity. Through the suction effect of the negative pressure generating device, a negative pressure environment is formed in the negative pressure cavity 121b, and the air between the to-be-assembled skin 30 and the wall surface of the first channel 121a enters the negative pressure cavity 121b, so that the to-be-assembled skin 30 is more closely attached to the wall surface of the first channel 121a, the size of the assembly channel 31 can be appropriately increased, the to-be-assembled skin 30 is expanded, and the insertion difficulty of the active bending section 21 is further reduced.

[0065] It is known that the skin assembly tool of the embodiment is used for assembling the skin outside the passive bending section 22, or simultaneously assembling the skin outside the active bending section 21 and the passive bending section 22, and has the same or similar structure, which will not be described here.

[0066] The skin assembly method of the embodiment is used for assembling the skin outside the active bending section 21 as an example.

[0067] The skin assembly method of the embodiment is realized based on the skin assembly tool of any one of the technical solutions in the embodiment. The skin assembly method of the embodiment includes the following steps:

[0068] Step S100: The to-be-assembled skin 30 is installed in the first channel 121a of the support 120, and the to-be-assembled skin 30 forms an assembly channel 31, as shown in FIG. 9.

[0069] Step S200: The first mandrel 110 is inserted into the cavity of the active bending section 21, and the active bending section 21 is kept in a straight state, as shown in FIG. 11 or FIG. 13.

[0070] Step S300: The active bending section 21 passes through the assembly channel 31, and the to-be-assembled skin 30 is wrapped on the active bending section 21, as shown in FIG. 12. For example, after the active bending section 21 passes through the assembly channel 31, the to-be-assembled skin 30 is removed from the support 120, so that the to-be-assembled skin 30 is wrapped on the active bending section 21, and then the active bending section 21 wrapped with the skin is taken out of the first channel 121a.

[0071] It is known that the first mandrel 110 can be inserted into the cavity of the active bending section 21 first, and then the to-be-assembled skin 30 is installed in the first channel 121a of the support 120, that is, the order of steps S100 and S200 can be exchanged.

[0072] The skin assembling method of the embodiment can fix the skin 30 to be assembled, and also improve the hardness of the active bending section 21 by the first core rod 110, so that when the skin is assembled, the assembling difficulty of the skin can be reduced, and the skin can be prevented from being damaged, and the technical problems of great assembling difficulty and easy damage of the skin when the skin is assembled outside the insertion part in the related art are solved.

[0073] In some embodiments, after the skin 30 to be assembled is installed in the first channel 121a of the support 120, the following steps are further included: the two ends of the skin 30 to be assembled are folded and sleeved on the support pipe 121, and the negative pressure cavity 121b is formed into a sealed cavity. The negative pressure generating device connected with the connector 122 is started, so that the negative pressure cavity 121b is kept in a negative pressure state. By the suction force of the negative pressure generating device, the skin 30 to be assembled can be more closely attached to the wall surface of the first channel 121a, the size of the assembling channel 31 can be appropriately increased, the skin 30 to be assembled can be expanded, and the insertion difficulty of the active bending section 21 can be further reduced.

[0074] For example, after the active bending section 21 passes through the assembling channel 31, the negative pressure generating device is closed, so that the skin 30 to be assembled is wrapped on the active bending section 21, and then the active bending section 21 wrapped with the skin is taken out of the first channel 121a.

[0075] In some embodiments, after the first core rod 110 is inserted into the cavity of the active bending section 21, the following steps are further included: the insertion section 131 of the second core rod 130 is inserted into the front end of the active bending section 21, and the abutting surface 133 of the second core rod 130 abuts against the front end surface of the active bending section 21, as shown in FIG. 15.

[0076] In the scheme of the embodiment, by inserting the second core rod 130 into the front end of the active bending section 21, first, the insertion of the first core rod 110 from both ends of the active bending section 21 can reduce the insertion difficulty of the first core rod 110; second, the abutting surface 133 abutting against the front end surface of the active bending section 21 can prevent the front end surface of the active bending section 21 from puncturing the skin 30 to be assembled; third, the front end of the second core rod 130 can appropriately expand the assembling channel 31, which can reduce the difficulty of inserting the active bending section 21 into the assembling channel 31, and can further prevent the snake bone joints 21c and / or the rivets 21a on the active bending section 21 from puncturing the skin 30 to be assembled.

[0077] It can be known that the skin assembling method of the embodiment is used for assembling the skin outside the passive bending section 22, or simultaneously assembling the skin outside the active bending section 21 and the passive bending section 22, and has the same or similar method, which will not be described here.

[0078] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A skin assembly jig for an insertion section of an endoscope, characterized by, The skin assembly tool comprises a first mandrel and a support, The first mandrel 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 mandrel abuts against the inner wall of the active bending section and / or the passive bending section. The support has a first channel, the skin to be assembled is placed in the first channel, and the skin to be assembled is attached to the wall surface of the first channel, so that the skin to be assembled forms an assembly channel for the active bending section and / or the passive bending section to pass through.

2. The skin assembly tool of claim 1, wherein, One end of the first mandrel is provided with a handle, and the other end of the first mandrel protrudes out of the active bending section or the passive bending section; or One end of the first mandrel is provided with a handle, and the other end of the first mandrel is located at the last snake bone joint of the active bending section or the passive bending section.

3. A skin assembly tool according to claim 1 or 2, wherein, A second mandrel is further included, 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 L1≥L2, wherein, L1 is the radial dimension of the front end of the second mandrel, L2 is the radial dimension of the active bending section or the passive bending section after the skin to be assembled is wrapped outside the active bending section or the passive bending section.

4. The skin assembly tool of claim 3, wherein, The second mandrel comprises an insertion section and a support section, the radial dimension of the insertion section is smaller than that of the support section, the insertion section is used to be inserted into the active bending section or the passive bending section, and the surface of the support section is smooth.

5. The skin assembly tool of claim 4, wherein, The connection between the insertion section and the support section forms an abutting surface, and when the second mandrel is inserted into the active bending section or the passive bending section, the abutting surface abuts against the front end surface of the active bending section or the front end surface of the passive bending section.

6. The skin assembly tool of claim 4, wherein, The first mandrel and the insertion section are provided with a avoiding slot, the avoiding slot is used to accommodate a riveting part and a traction rope mounting part on the active bending section and / or the passive bending section, and the riveting part and the traction rope mounting part abut against the avoiding slot.

7. The skin assembly tool of claim 1, wherein, The support comprises a support pipe and a joint, wherein, The inside of the support pipe forms the first channel, and a negative pressure cavity is further formed outside the first channel, the negative pressure cavity communicates with the first channel and the joint; The joint is used to connect a negative pressure generating device.

8. A method of assembling a skin, characterized in that, The skin assembly tool according to any one of claims 1 to 7 is implemented, and the skin assembly method comprises the following steps: The skin to be assembled is installed in the first channel of the support, and the skin to be assembled forms an assembly channel; The first mandrel is inserted into the cavity of the active bending section and / or the passive bending section, and the active bending section and / or the passive bending section is kept in a straight state; The active bending section and / or the passive bending section passes through the assembly channel, and the skin to be assembled is wrapped on the active bending section and / or the passive bending section.

9. The method of assembling a skin of claim 8, wherein, After the skin to be assembled is installed in the first channel of the support, the following steps are further included: The two ends of the skin to be assembled are folded and sleeved on the support pipe, and the negative pressure cavity is formed into a sealed cavity; The negative pressure generating device connected with the joint is started to keep the negative pressure state of the negative pressure cavity.

10. The method of assembling a skin of claim 8, wherein, After the first core rod is inserted into the cavity of the active bending section and / or the passive bending section, the method further comprises the following steps: The insertion section of the second core rod is inserted into the front end of the active bending section or the passive bending section, and the abutting surface of the second core rod abuts against the front end surface of the active bending section or the front end surface of the passive bending section.

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