Welding positioning tool for fixing endoscope traction rope

Abstract

The utility model provides a welding positioning tool for fixing an endoscope traction rope, and relates to the technical field of welding, the welding positioning tool comprises a base and a positioning table, the positioning table is installed on the base, the positioning table is provided with an abutting side face, and a chuck located on the same side with the abutting side face is arranged on the positioning table in a protruding mode; the chuck is used for being inserted into the pipe cavity and enabling the head structure to abut against the inner pipe wall of the pipe cavity; the abutting side face is used for making contact with the head structure so as to limit the position of the head structure in the axial direction of the tube cavity. According to the structural design of the tool, the positioning firmness of the bending structure and the head structure can be improved, the shifting risk in the welding process is reduced, and the welding quality and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and more specifically, to a welding positioning fixture for fixing an endoscope traction rope. Background Technology

[0002] In existing technology, an endoscope assembly includes a curved structure, a head structure, and a cable. The cable passes through the head structure and is fixedly engaged with it using a compression method. The curved structure is tubular and has a cavity. The head structure is located within the cavity and is fixedly connected to the inner wall of the cavity, thereby achieving a fixed connection between the cable and the curved structure. By applying force to the cable, the curved structure can bend, adjusting its direction. Currently, the head structure and the curved structure are fixed using welding.

[0003] The inventors discovered in their research that the welding methods used for the head structure and bending structure in the prior art have at least the following drawbacks:

[0004] During welding, the head structure and the curved structure are manually positioned, and then welded using laser welding equipment. The manual positioning posture needs to be maintained continuously during the welding process, which is labor-intensive, carries the risk of displacement, and results in poor welding quality. Utility Model Content

[0005] The purpose of this utility model includes, for example, providing a welding positioning fixture for fixing an endoscope traction rope, which can improve the positioning stability, reduce the risk of displacement during welding, and improve welding quality and efficiency.

[0006] The embodiments of this utility model can be implemented as follows:

[0007] In a first aspect, this utility model provides a welding positioning fixture for fixing an endoscope traction rope, used to position a head structure and a curved structure to be welded, wherein the curved structure has a cavity, and the head structure is located within the cavity, comprising:

[0008] A base and a positioning platform are provided. The positioning platform is mounted on the base and has an abutting side. A clamp protrudes from the positioning platform and is located on the same side as the abutting side. The clamp is used to insert into the cavity and allows the head structure to abut against the inner wall of the cavity. The abutting side is used to contact the head structure to limit the axial position of the head structure in the cavity.

[0009] In an optional embodiment, the positioning platform and the base are slidably engaged in a preset direction to adjust the external force exerted by the positioning platform on the head structure against the inner tube wall.

[0010] Based on the above scheme, when positioning the curved structure, the positioning platform can be moved close to the base first. The small distance between the chuck on the positioning platform and the base makes it less likely for the chuck to interfere with the end face of the curved structure when it is inserted into the tube cavity, facilitating insertion. After insertion, the positioning platform is moved away from the base, allowing it to contact the head structure and press it firmly against the inner wall of the tube cavity, thus achieving the positioning of both the head structure and the curved structure.

[0011] In an optional embodiment, the welding positioning fixture for fixing the endoscope traction rope further includes an elastic element, which is connected to both the base and the positioning platform, and is used to give the positioning platform a tendency to move away from the base.

[0012] Based on the above solution, the positioning platform can automatically rebound through the elastic element. That is, after pressing the positioning platform close to the base, the positioning platform is released. Under the action of the elastic element, the positioning platform moves away from the base, and the clamp on the positioning platform can automatically contact the head structure and press against the inner tube wall through the elastic element head structure, making the operation flexible.

[0013] In an optional embodiment, the welding positioning fixture for fixing the endoscope traction rope further includes a guide member, which is fixed to the base, and the positioning platform and the guide member are slidably engaged in the preset direction.

[0014] Based on the above solution, the positioning platform slides along the guide, resulting in a smoother sliding motion.

[0015] In an optional embodiment, the guide member is provided with a limiting portion, which is used to abut against the positioning platform to prevent the positioning platform from disengaging from the guide member when it moves away from the base.

[0016] Based on the above solution, the positioning platform will not detach from the guide under the action of the limiting part, ensuring safe use.

[0017] In an optional embodiment, the elastic element is sleeved around the guide element.

[0018] Based on the above solution, the guide component can not only serve as a guide and positioning platform, but also as a positioning elastic component, making the elastic force of the elastic component more stable, the elastic component less prone to damage, and its service life longer.

[0019] In an optional embodiment, there are two positioning platforms, which are arranged at intervals. The clamps on both positioning platforms are used to simultaneously insert into the cavity to restrict the radial degrees of freedom of the head structure and the bending structure in the cavity.

[0020] Based on the above scheme, by using two positioning platforms to clamp the bending structure, the stability of the bending structure's position in the radial direction of the tube can be guaranteed. During welding, the bending structure and the head structure are less likely to be displaced in the radial direction, resulting in high welding quality.

[0021] In an optional embodiment, the positioning platform is provided with an anti-rotation protrusion, the abutting side is provided on the anti-rotation protrusion, and the clamp is fixedly connected to the anti-rotation protrusion; the anti-rotation protrusion is used to engage with the end of the bending structure to restrict the bending structure from rotating relative to the clamp.

[0022] Based on the above scheme, the port of the curved structure can be inserted with the anti-rotation protrusion, which can not only realize the rapid positioning of the chuck and the head structure, but also ensure that the curved structure and the head structure will not rotate around the axis of the cavity, and the head structure will not leave the chuck due to rotation. The fit between the curved structure and the chuck is tighter, and the positioning effect is better.

[0023] In an optional embodiment, the base is provided with a positioning groove for positioning the curved structure.

[0024] Based on the above solution, the curved structure is placed in the positioning groove, making the position of the curved structure more stable. The curved structure slides along the positioning groove and can be inserted and matched with the clamp, reducing the positioning difficulty and shortening the positioning time.

[0025] In an optional embodiment, the welding positioning fixture for fixing the endoscope traction rope further includes a pressure plate and a locking member. The pressure plate is movably connected to the base and is used to cooperate with the base to clamp the tube body connected to the curved structure. The locking member is used to connect to both the pressure plate and the base simultaneously so that the pressure plate is held in the position where it cooperates with the base to clamp the tube body.

[0026] Based on the above scheme, the tube body and the bending structure are fixed together. The tube body is positioned by the cooperation of the pressure plate and the base, which increases the positioning points of the bending structure. The position of the bending structure is more secure, and it is not easy to shift during welding, resulting in higher welding quality.

[0027] The beneficial effects of this utility model embodiment include, for example:

[0028] In summary, the welding and positioning fixture for fixing the endoscope traction rope provided in this embodiment requires welding. First, the cable is fixed to the head structure. Then, the head structure is inserted into the curved structure, and finally, the curved structure is installed on the positioning fixture. Specifically, the end of the curved structure closest to the head structure is brought close to the positioning table, so that the clamp on the positioning table is inserted into the cavity, and the clamp contacts the head structure located in the cavity, causing the head structure to abut against the inner wall of the cavity. In this way, the head structure is clamped by the cooperation of the clamp and the inner wall, and the radial position of the head structure and the curved structure in the cavity is stable. At the same time, during the process of fitting the distal end of the curved structure outside the clamp, the curved structure can drive the head structure to move closer to the abutting side through the positioning plate. When the head structure contacts the abutting side, the curved structure can no longer move closer to the abutting side. The axial positioning of the curved structure and the head structure is completed. In this way, the position of the head structure relative to the curved structure is restricted in both the radial and axial directions. Moreover, welding does not rely on manual positioning, resulting in low labor intensity, less displacement, and high welding quality. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the endoscope insertion tube;

[0031] Figure 2 This is a schematic diagram illustrating the application of the welding positioning fixture for fixing the endoscope traction rope according to an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the base according to an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the positioning stage according to an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the positioning component according to an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the locking component according to an embodiment of this application.

[0036] icon:

[0037] 001-Tube body; 002-Bending structure; 021-Anti-rotation groove; 003-Head structure; 004-Cable; 005-Positioning plate; 100-Base; 101-Assembly groove; 102-Positioning groove; 200-Positioning platform; 201-Abutting side; 202-Clamp; 203-Anti-rotation protrusion; 210 First positioning platform; 220-Second positioning platform; 300-Guide component; 310-Limiting part; 400-Elastic component; 500-Pressure plate; 600-Mounting platform; 700-Rotating shaft; 800-Anti-slip block; 900-Locking component; 910-Knob; 920-Screw. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0043] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0044] Please combine Figure 1In the prior art, the endoscope insertion tube includes a tube body 001, a curved structure 002, a head structure 003, and a cable 004. The distal end of the tube body 001 is fixedly connected to the proximal end of the curved structure 002. The proximal end of the cable 004 passes through the head structure 003 and is fixedly connected to it. The head structure 003 is generally welded to the inner wall of the curved structure 002. Simultaneously, to facilitate positioning of the head structure 003 within the lumen, a positioning plate 005 is provided on the inner wall of the curved structure 002. The positioning plate 005 is a curved plate, and it cooperates with the inner wall to define a positioning channel. The positioning channel is located near the distal end of the curved structure 002. The side of the positioning plate 005 near the distal end of the curved structure 002 can be called the positioning side. The distance between the positioning side and the distal end of the curved structure 002 is no greater than the axial dimension of the head structure 003 within the lumen. Before welding the head structure 003 to the curved structure 002, the proximal end of the pull cable 004 is inserted into the distal end of the curved structure 002, and the pull cable 004 passes through the positioning channel. Pulling the pull cable 004 causes the head structure 003 to retract from the distal end into the curved structure 002, allowing the head structure 003 to abut against the positioning side. The positioning plate 005 restricts the position of the head structure 003. The proximal and distal reference points of each component are the same; the proximal end is the end closer to the operator when operating the endoscope, while the distal end is the end closer to the patient.

[0045] The designers found that, in the existing technology, when welding and fixing the head structure 003 and the curved structure 002, the head structure 003 and the curved structure 002 are generally positioned manually, which is labor-intensive, prone to displacement during welding, and results in poor welding quality.

[0046] In view of this, the designers have provided a welding positioning fixture for fixing the endoscope traction rope, which can improve the positioning effect and welding quality.

[0047] It should be noted that this positioning fixture is mainly used to position the endoscope insertion tube. In other embodiments, it can also be used to position other parts to be welded that need to be positioned from the inside. This embodiment does not exhaustively list them.

[0048] Please combine Figure 2 and Figure 4 In this embodiment, the welding positioning fixture for fixing the endoscope traction rope includes a base 100 and a positioning platform 200. The positioning platform 200 is mounted on the base 100 and has an abutting side 201. A clamp 202 protrudes from the positioning platform 200 and is located on the same side as the abutting side 201. The clamp 202 is used to be inserted into the lumen and can make the head structure 003 abut against the inner wall of the lumen. The abutting side 201 is used to contact the head structure 003 to limit the position of the head structure 003 in the axial direction of the lumen.

[0049] As described above, the welding positioning fixture for fixing the endoscope traction rope provided in this embodiment is used as follows:

[0050] Before starting, insert the cable 004 into the positioning channel from the far end of the curved structure 002. Pulling the cable 004 will bring the head structure 003 into contact with the positioning side of the positioning plate 005. Then, bring the far end of the curved structure 002 close to the positioning platform 200 so that the clamp 202 on the positioning platform 200 is inserted into the cavity and contacts the head structure 003 located in the cavity, so that the head structure 003 abuts against the inner wall of the cavity. After installation, the clamp 202 is at the bottom, and the weight of the curved structure 002 and the head structure 003 acts directly on the clamp 202. In this way, the head structure 003 is clamped by the cooperation of the clamp 202 and the inner wall of the cavity, and the head structure 003 and the curved structure 002 are stabilized in the radial direction of the cavity. Simultaneously, during the process of fitting the distal end of the curved structure 002 onto the clamp 202, the curved structure 002 can move the head structure 003 closer to the abutment side 201 via the positioning plate 005. When the head structure 003 contacts the abutment side 201, the curved structure 002 can no longer move closer to the abutment side 201, thus completing the axial positioning of the curved structure 002 and the head structure 003. In this way, the position of the head structure 003 relative to the curved structure 002 is restricted both radially and axially, requiring less manual intervention, reducing labor intensity, and minimizing displacement of the head structure 003 and the curved structure 002 during welding, resulting in high welding quality.

[0051] It should be understood that after positioning, the welding positions of the bent structure 002 and the head structure 003 are located above the base 100, making them less likely to be obstructed and providing sufficient operating space for the welding torch, resulting in convenient and efficient welding. Furthermore, welding can be performed using methods such as laser welding; this embodiment does not impose specific limitations.

[0052] The following embodiments illustrate the detailed structure of the welding positioning fixture for fixing the endoscope traction rope of this application by way of example.

[0053] Please combine Figure 2 In this embodiment, optionally, the welding positioning fixture for fixing the endoscope traction rope includes a base 100, a positioning component, and a locking component. The positioning component is mounted on the base 100 and can cooperate with the base 100 to position the bending structure 002 and the head structure 003. The locking component is mounted on the base 100 and can cooperate with the base 100 to clamp the tube body 001, thereby improving the stability of the tube body 001 and the bending structure 002 relative to the base 100.

[0054] By using the positioning and locking components together, the bent structure 002 can be positioned on the base 100, and the head structure 003 can also be positioned relative to the bent structure 002. During welding, the head structure 003 is firmly and reliably positioned relative to the bent structure 002, and is not easily displaced, resulting in high welding quality.

[0055] Please combine Figure 2 and Figure 3 Optionally, the base 100 can be configured as a plate-like structure. An assembly groove 101 is provided on the top plate surface of the base 100. The assembly groove 101 is a rectangular through-slot extending in the width direction of the base 100. A positioning groove 102 is also provided on the top plate surface of the base 100. The positioning groove 102 can be an arc-shaped through-slot, and its length extends in the length direction of the base 100. One end of the positioning groove 102 connects to the assembly groove 101, and the other end extends to the side of the base 100. Multiple positioning grooves 102 can be provided, evenly spaced in the width direction of the base 100. For example, in this embodiment, there are six positioning grooves 102. Thus, each positioning groove 102 can hold one tube 001, and the six positioning grooves 102 can simultaneously hold six tubes 001, enabling simultaneous welding of six endoscope insertion tubes and improving welding efficiency.

[0056] Please combine Figure 2 and Figure 4 Optionally, the positioning component includes a positioning platform 200, which can be a rectangular block. One side of the positioning platform 200 is provided with an anti-rotation protrusion 203 and a clamp 202. The side of the anti-rotation protrusion 203 away from the positioning platform 200 is the abutment side 201. The clamp 202 can be fixed to the anti-rotation protrusion 203, or the clamp 202 and the anti-rotation protrusion 203 can be arranged alternately, with the clamp 203 and the anti-rotation protrusion 203 located on the same side of the positioning platform 200. Furthermore, the positioning platform 200, the anti-rotation protrusion 203, and the clamp 202 can be configured as a single integrated structure. Correspondingly, an anti-rotation groove 021 is provided on the distal end face of the curved structure 002. When the distal end of the curved structure 002 approaches the positioning table 200, the clamp 202 can extend into the cavity of the curved structure 002, and the anti-rotation protrusion 203 can engage with the anti-rotation groove 021, thereby restricting the curved structure 002 from rotating around its own axis. This prevents the curved structure 002 and the head structure 003 from rotating relative to the base 100, resulting in better positioning. It should be understood that there can be two anti-rotation grooves 021 on the distal end face of the curved structure 002. The two anti-rotation grooves 021 are arranged symmetrically at the center and engage with the anti-rotation protrusion 203, resulting in better anti-rotation effect.

[0057] Optionally, the chuck 202 can be configured as a strip. For example, in this embodiment, the chuck 202 is configured as a strip plate, which has a large contact area with the head structure 003 and a good positioning effect.

[0058] Please combine Figure 2 and Figure 5 In this embodiment, optionally, to improve the positioning effect, the number of positioning platforms 200 is two. For ease of description, the two positioning platforms 200 are referred to as the first positioning platform 200 and the second positioning platform 220. The positioning assembly also includes a guide member 300 and an elastic member 400. The first positioning platform 200 is installed in the assembly groove 101. The guide member 300 is connected to both the first positioning platform 200 and the base 100, fixing the first positioning platform 200 within the assembly groove 101. The second positioning platform 220 is sleeved on the guide member 300, and the second positioning platform 220 and the guide member 300 are slidably engaged in a preset direction, which is the length direction of the guide member 300. Furthermore, a limiting part 310 is provided at the top of the guide member 300. The limiting part 310 can be an end cap. When the second positioning platform 220 slides away from the first positioning platform 200 or the base 100, it can contact the limiting part 310, preventing the second positioning platform 220 from directly sliding away from the guide member 300. The second positioning platform 220 slides relative to the guide member 300, and can adjust the distance between the clamps 202 on the first positioning platform 200 and the clamps 202 on the second positioning platform 220. When installing the curved structure 002, the distance between the two clamps 202 is reduced, so that the far end of the curved structure 002 can be sleeved on the two clamps 202.

[0059] Optionally, the elastic element 400 can be a spring. The elastic element 400 is sleeved outside the guide element 300. The two ends of the elastic element 400 are in contact with the first positioning platform 200 and the second positioning platform 220 respectively, so that the elastic element 400 is in a compressed state and has a tendency to move the second positioning platform 220 away from the first positioning platform 200. In other words, when assembling the curved structure 002, the second positioning platform 220 can be pressed first to bring it closer to the first positioning platform 200, reducing the distance between the two clamps 202. Then, the curved structure 002 is sleeved on the two clamps 202. The curved structure 002 drives the head structure 003 to move until the head structure 003 contacts the abutting side 201. The axial positions of the curved structure 002 and the head structure 003 are determined. The second positioning platform 220 is released. Under the action of the elastic element 400, the second positioning platform 220 moves upward, thereby increasing the distance between the two clamps 202, so that the clamps 202 contact the corresponding head structure 003, and press the head structure 003 against the inner tube wall of the curved structure 002, thus completing the positioning of the curved structure 002 and the head structure 003.

[0060] It should be understood that the curved structure 002 is generally used in conjunction with two or four cables 004. In this embodiment, the curved structure 002 is used in conjunction with two cables 004 as an example. The two cables 004 are configured with two head structures 003. After the first positioning platform 200 and the second positioning platform 220 are used in conjunction with the curved structure 002, the two clamps 202 contact the two head structures 003 respectively, thereby achieving positioning. After positioning, the two head structures 003 are arranged in a preset direction, that is, they are arranged vertically. Generally, the upper head structure 003 is welded to the curved structure 002 first, the insertion tube is removed, and the positioning operation is re-performed. The lower head structure 003 is adjusted to the upper position and then welded. Since the upper part of the curved structure 002 is not affected by the base 100, the space is large, the welding operation is more convenient, the welding efficiency is high, and the welding quality is high.

[0061] Furthermore, when there are multiple positioning grooves 102, multiple endoscope insertion tubes to be welded can be positioned simultaneously on the base 100. Correspondingly, there are multiple positioning components, each capable of positioning a corresponding insertion tube. For example, in this embodiment, there are six positioning components arranged in the width direction of the base 100. It should be understood that the positioning operation of each insertion tube is performed independently and does not affect each other.

[0062] Please combine Figure 2 and Figure 6 In this embodiment, optionally, the locking assembly includes a pressure plate 500, a mounting platform 600, a rotating shaft 700, an anti-slip block 800, and a locking element 900. The mounting platform 600 is fixed to the base 100. One side of the pressure plate 500 is rotatably engaged with the mounting platform 600 via the rotating shaft 700. The anti-slip block 800 is mounted on the surface of the pressure plate 500 near the base 100, and the anti-slip block 800 can be a silicone pad, etc. The locking element 900 is fixed to the pressure plate 500 and can be screwed to the base 100. Thus, before welding, the pressure plate 500 is opened, leaving the slot of the positioning groove 102 uncovered. The tube body 001 is placed in the positioning groove 102, and the pressure plate 500 is rotated so that the anti-slip body on the pressure plate 500 contacts the tube body 001. The pressure plate 500 and the anti-slip body work together to press the tube body 001 firmly onto the base 100. Then, the locking component 900 is rotated to screw it onto the base 100. The pressure plate 500 is not easily loosened from the tube body 001, resulting in good positioning. During welding, the curved structure 002 and the head structure 003 are limited by the positioning component, and the tube body 001 is positioned by the locking component. The tube body 001 is fixedly connected to the curved structure 002. This provides more positioning points during welding of the endoscope insertion tube, resulting in better positioning.

[0063] Optionally, the locking element 900 may include a knob 910 and a screw 920. The screw 920 passes through the pressure plate 500 and the two are rotatably engaged. The knob 910 is fixed to one end of the screw 920 and abuts against the pressure plate 500. The other end of the screw 920 can be screwed onto the base 100, thereby limiting the position of the pressure plate 500 through the engagement of the knob 910 and the base 100. Applying force to the knob 910 facilitates the rotation of the screw 920, requiring less effort.

[0064] It should be understood that in other embodiments, the pressure plate 500 can also be movably engaged with the base 100 by means of sliding, etc., to adjust the position of the pressure plate 500 relative to the base 100, thereby locking or releasing the tube body 001.

[0065] The welding and positioning fixture for fixing the endoscope traction rope provided in this embodiment places the tube body 001 and the curved structure 002 in the positioning groove 102. Two positioning platforms 200 press the head structure 003 against the inner wall of the curved structure 002, achieving radial positioning of the head structure 003 and the curved structure 002. Furthermore, the distal end of the head structure 003 can contact the abutment side 201 on the positioning platform 200, clamping the head structure 003 between the abutment side 201 and the positioning side of the positioning plate 005, achieving axial positioning of the head structure 003 and the curved structure 002. Simultaneously, the anti-rotation groove 021 on the distal end of the curved structure 002 can engage with the anti-rotation protrusion 203, achieving circumferential positioning of the curved structure 002 and the head structure 003. The positioning effect of the curved structure 002 and the head structure 003 is good, and the welding quality is high.

[0066] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A welding positioning fixture for fixing an endoscope traction rope, used to position a head structure (003) and a curved structure (002) to be welded, the curved structure (002) having a lumen, the head structure (003) being located within the lumen, characterized in that, include: A base (100) and a positioning platform (200) are provided. The positioning platform (200) is mounted on the base (100). The positioning platform (200) has an abutment side (201). A clamp (202) is protruding from the positioning platform (200) and located on the same side as the abutment side (201). The clamp (202) is used to insert into the cavity and allows the head structure (003) to abut against the inner wall of the cavity. The abutment side (201) is used to contact the head structure (003) to limit the position of the head structure (003) in the axial direction of the cavity.

2. The welding positioning fixture for fixing the endoscope traction rope according to claim 1, characterized in that: The positioning platform (200) and the base (100) are slidably engaged in a preset direction to adjust the positioning platform (200) so that the head structure (003) abuts against the inner tube wall.

3. The welding positioning fixture for fixing the endoscope traction rope according to claim 2, characterized in that: The welding positioning fixture for fixing the endoscope traction rope also includes an elastic element (400), which is connected to both the base (100) and the positioning platform (200). The elastic element (400) is used to make the positioning platform (200) have a tendency to move away from the base (100).

4. The welding positioning fixture for fixing the endoscope traction rope according to claim 3, characterized in that: The welding positioning fixture for fixing the endoscope traction rope also includes a guide (300), which is fixed to the base (100), and the positioning platform (200) and the guide (300) are slidably engaged in the preset direction.

5. The welding positioning fixture for fixing the endoscope traction rope according to claim 4, characterized in that: The guide member (300) is provided with a limiting part (310), which is used to abut against the positioning platform (200) to prevent the positioning platform (200) from disengaging from the guide member (300) when it moves away from the base (100).

6. The welding positioning fixture for fixing the endoscope traction rope according to claim 4, characterized in that: The elastic element (400) is sleeved on the outside of the guide element (300).

7. The welding positioning fixture for fixing the endoscope traction rope according to claim 1, characterized in that: The number of positioning platforms (200) is two, and the two positioning platforms (200) are arranged at intervals. The clamps (202) on the two positioning platforms (200) are used to be inserted into the cavity at the same time to restrict the degree of freedom of the head structure (003) and the bending structure (002) in the radial direction of the cavity.

8. The welding positioning fixture for fixing the endoscope traction rope according to claim 1, characterized in that: The positioning platform (200) is provided with an anti-rotation protrusion (203), the abutting side (201) is provided on the anti-rotation protrusion (203), and the clamp (202) is fixedly connected to the anti-rotation protrusion (203); the anti-rotation protrusion (203) is used to engage with the end of the bending structure (002) to restrict the bending structure (002) from rotating relative to the clamp (202).

9. The welding positioning fixture for fixing the endoscope traction rope according to claim 1, characterized in that: The base (100) is provided with a positioning groove (102), which is used to position the curved structure (002).

10. The welding positioning fixture for fixing the endoscope traction rope according to any one of claims 1-9, characterized in that: The welding positioning fixture for fixing the endoscope traction rope also includes a pressure plate (500) and a locking member (900). The pressure plate (500) is movably connected to the base (100). The pressure plate (500) is used to cooperate with the base (100) to clamp the curved structure (002). The locking member (900) is used to connect to both the pressure plate (500) and the base (100) at the same time, so that the pressure plate (500) is held in the position where it cooperates with the base (100) to clamp the curved structure (002).

Images