Positioning tool for assembling hard tube endoscope

Abstract

The invention discloses a positioning tool for assembling a hard tube endoscope, and belongs to the technical field of optical lens processing devices.The positioning tool comprises a bottom plate, conveying guide rails are integrally formed and connected to the two sides of the top end of the bottom plate, sliding blocks fixed to pushing air cylinders are movably connected to the conveying guide rails, and the pushing air cylinders are symmetrically arranged with the bottom plate as the center; the eyepiece clamping and docking mechanism comprises a first rack arranged on the sliding block, a first motor is installed on the first rack, an output shaft of the first motor extends to first rotating teeth on the inner wall of the first cover body, and the first cover body is fixedly connected with a shell of the first motor through a first rotating rod. The technical problems that during manual assembly, the working efficiency is low, and during machine assembly, a single-shape clamping mechanism cannot be used for effective limiting and fixing and cannot be used for adaptive clamping according to the shape of an assembly, so that the follow-up assembly work is affected can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of optical component positioning tooling, and in particular relates to a positioning tooling for assembling a rigid tube endoscope. Background Art

[0002] Rigid tube endoscopes are mainly used for the diagnosis and treatment of lesions in the superficial and shallow natural cavities of the human body and through puncture of the oral cavity, such as cystoscopes and hysteroscopes. They cannot be bent during operation. Rigid tube endoscopes are mainly composed of optical imaging systems and lighting systems: the optical part looks like a long and thin metal tube, and a complete optical system composed of many lenses is installed inside. The optical imaging system consists of three major systems: the objective system, the image transfer system, and the eyepiece system. The inverted image of the object being observed through the objective lens is converted into a positive image through the image transfer system and transmitted to the eyepiece, which is then magnified by the eyepiece and observed by the human eye.

[0003] When assembling a rigid tube endoscope, due to the small length of the workpiece, manual assembly will result in low work efficiency on the one hand, and poor assembly positioning accuracy on the other hand, which will easily affect the effective connection between the objective lens and the eyepiece, thereby reducing the product assembly quality. At the same time, if an automated machine is used for assembly and positioning, due to the non-uniform shapes of the various components of the rigid tube endoscope, a single-shaped clamping mechanism cannot effectively limit and fix, and cannot adaptively clamp according to the shape of the component, thereby affecting subsequent assembly work and being detrimental to the normal operation of the device. Summary of the invention

[0004] The purpose of the present invention is to provide a positioning tool for assembling a rigid tube endoscope to solve the technical problems of low work efficiency during manual assembly and the inability of a single-shaped clamping mechanism to effectively limit and fix during machine assembly, and the inability to adaptively clamp according to the shape of the component, thereby affecting subsequent assembly work.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A positioning tool for assembling a rigid tube endoscope, comprising: A bottom plate, both sides of the top of the bottom plate are integrally connected with conveying rails, and the conveying rails are movably connected with sliders fixed on the pushing cylinders, and the pushing cylinders are symmetrically arranged around the center of the bottom plate; An eyepiece clamping and docking mechanism, the eyepiece clamping and docking mechanism comprises a first frame placed on a slider, a first motor is mounted on the first frame, an output shaft of the first motor extends to a first rotating tooth on an inner wall of a first cover body, the first cover body and the housing of the first motor are fixedly connected via a first rotating rod, both ends of the outer wall of the first rotating tooth are meshed with a first gear plate and a second gear plate that move in opposite directions, and one end of the first gear plate and the second gear plate both extend to a first clamping assembly connected to the eyepiece; Wherein, the first clamping assembly comprises a mold with a tapered groove, a through hole disposed on the inner wall of the mold is provided at an extension of one end of the tapered groove, and an inclined surface connected to the eyepiece is provided in the length direction of the through hole; A working mirror tube clamping and docking mechanism, the working mirror tube clamping and docking mechanism comprises a second frame placed on a slider, a second motor is mounted on the second frame, an output shaft of the second motor extends to a second rotating tooth on an inner wall of a second cover body, the second cover body and the housing of the second motor are fixedly connected via a second rotating rod, both ends of the outer wall of the second rotating tooth are meshed with a third gear plate and a fourth gear plate that move in opposite directions, and one end of the third gear plate and the fourth gear plate both extend to a second clamping assembly connected to the working mirror tube; Wherein, the second clamping assembly includes a first rotating disk, the first rotating disk and the second cover body are fixedly connected by a crossbeam, one end of the crossbeam passes through the first rotating disk and extends to the outer wall of the second rotating disk, and the third gear plate and the fourth gear plate are connected to the upper arc clamping plate and the lower arc clamping plate at the extension of one end, and the upper arc clamping plate and the lower arc clamping plate are arranged along the slide groove in the height direction of the first rotating disk and the second rotating disk, and the first rotating disk and the second rotating disk are both provided with a central groove; The outer walls of the first motor and the second motor are both fixedly mounted with turbines placed on the first frame and the second frame, the outer walls of the turbines are spirally meshed with a worm fixed on the rotating shaft, one end of the rotating shaft is connected to a rotating handle extending to the outside, and as the rotating handle rotates, the turbine drives the eyepiece clamping and docking mechanism and the working mirror tube clamping and docking mechanism to rotate.

[0006] Furthermore, it also includes a positioning ring placed at the center of the bottom plate and connected to the optical cable interface, wherein the positioning ring is provided with a positioning hole and is equipped with an adjusting bolt adapted thereto.

[0007] Furthermore, the eyepiece and the working lens tube are both provided with threads at one end of the outer wall and are installed on the optical cable interface by means of threaded connection.

[0008] Furthermore, the working mirror tube clamping and docking mechanism also includes a positioning component placed at both ends of the center groove, the positioning component includes a fixed block fixed on the first turntable, one end of the outer wall of the fixed block is connected to a movable plate through a compression spring, a positioning column is fixedly connected to the movable plate, and one side of the outer wall of the positioning column is connected to an inwardly inclined conical surface near the center groove.

[0009] Furthermore, the fixed block and the movable plate are connected via a guide column, and one end of the guide column passes through the movable slot on the fixed block and extends to the outside.

[0010] Furthermore, the bottom ends of the first and second turntables are each provided with an arc-shaped plate fixed on the second frame, the arc-shaped plate is arranged along the outer wall edge of the first and second turntables and is provided with an arc-shaped groove, and the inner wall of the arc-shaped groove is provided with a rolling wheel connected to the first and second turntables.

[0011] Furthermore, the first turntable and the second turntable are arranged in parallel, and both ends of the outer walls of the first turntable and the second turntable are provided with slopes placed on the arc plate.

[0012] Furthermore, a U-shaped groove connected to the conveying guide rail is connected to the bottom end of the slider, and the piston rod on the push cylinder and the slider are fixedly connected via a bending rod.

[0013] Furthermore, the transmission ratio between the first rotating tooth and the first gear plate remains the same as the transmission ratio between the first rotating tooth and the second gear plate, and the transmission ratio between the second rotating tooth and the third gear plate remains the same as the transmission ratio between the second rotating tooth and the fourth gear plate.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) A positioning ring is provided at the center of the bottom plate. The optical cable interface can be inserted into the slot on the positioning ring, and then the optical cable interface can be further locked and fixed by adjusting the bolt. In addition, a threaded hole is provided on the inner wall of the optical cable interface to facilitate the threaded connection of the eyepiece and the working lens tube on the endoscope.

[0015] (2) An eyepiece clamping and docking mechanism is provided. After the first motor is started, it can drive the rotation of the first rotating tooth. With the help of the meshing transmission of the gears, the molds at both ends are brought close to each other and the eyepiece is clamped and limited. The conical groove on the mold cooperates with the through hole to better adapt to the shape of the eyepiece with a large front end and a small rear end. In addition, the inclined surface on the through hole can effectively allow the eyepiece to enter the conical groove when the eyepiece is clamped. For eyepieces that have deviated to a certain extent, the position can be corrected in time. In this way, it can achieve the effect of clamping and fixing while also preventing the eyepiece from deviating from the position, thereby improving the accuracy of the clamping position and ensuring the orderly docking of the eyepiece and the optical cable interface.

[0016] (3) A working mirror tube clamping and docking mechanism is provided. Since the working mirror tube is relatively long, it can be first placed on the central groove between the first turntable and the second turntable. Then, after the second motor is started, it can drive the rotation of the first rotating tooth. With the help of the meshing transmission of the gears, the upper arc clamping plate and the lower arc clamping plate at both ends are fixed by centering and clamping. In conjunction with the positioning component, the contact area can be reduced by the conical surface on the positioning column, thereby increasing the pressure. In addition, the positioning component is provided with a movable plate and a compression spring, so that comprehensive adaptive clamping and fixing can be achieved around the outer wall of working mirror tubes of different sizes. The positioning effect is good and the application performance is strong, thereby ensuring the orderly docking of the working mirror tube and the optical cable interface.

[0017] (4) A worm gear mechanism is provided. The first rotating rod and the second rotating rod can ensure that after the first motor and the second motor are started, the first cover body and the second cover body can be fixedly connected, and the gear transmission member can maintain normal operation. The worm gear mechanism can make the first motor and the second motor rotate accordingly, so that the eyepiece clamping and docking mechanism and the working mirror tube clamping and docking mechanism can be driven to rotate as a whole. In addition, a rolling wheel is provided on the working mirror tube clamping and docking mechanism, which provides corresponding support force and can also reduce friction damage, thereby ensuring that the first turntable and the second turntable can rotate freely, thereby improving the service life of the device. In cooperation with the pushing cylinder, the eyepiece and the working mirror tube are threadedly connected under the action of rotation and pushing, which effectively ensures the assembly quality, is convenient for manual operation, and has high control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of a positioning tool for assembling a rigid tube endoscope according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a positioning tool for assembling a rigid tube endoscope according to the present invention. Figure 2 ; Figure 3 It is a front view of a positioning tool for assembling a rigid tube endoscope according to the present invention; Figure 4 It is a schematic structural diagram of the hard tube endoscope of the present invention; Figure 5 is a schematic diagram of the meshing transmission of the first rotating tooth of the present invention; Figure 6 The present invention Figure 2 A magnified image of point A; Figure 7 is a schematic diagram of the meshing transmission of the second rotating tooth of the present invention; Figure 8 is a schematic structural diagram of the first rotating disk of the present invention; Fig. 9 It is a structural schematic diagram of the curved plate of the present invention; Fig.10 It is a connection schematic diagram of the turbine and the worm gear of the present invention.

[0020] Figure numerals: 1, bottom plate; 2, conveying guide rail; 3, push cylinder; 4, slider; 5, eyepiece clamping and docking mechanism; 6, first frame; 7, first motor; 8, first cover; 9, first rotating gear; 10, first rotating rod; 11, first gear plate; 12, second gear plate; 13, eyepiece; 14, first clamping assembly; 15, tapered groove; 16, mold; 17, through hole; 18, working mirror tube clamping and docking mechanism; 19, second frame; 20, second motor; 21, second cover; 22, second rotating gear; 23, The second rotating rod; 24, the third gear plate; 25, the fourth gear plate; 26, the working mirror tube; 27, the second clamping assembly; 28, the first turntable; 29, the crossbeam; 30, the second turntable; 31, the upper arc-shaped clamping plate; 32, the lower arc-shaped clamping plate; 33, the center groove; 34, the turbine; 35, the worm; 36, the handle; 37, the optical cable interface; 38, the positioning ring; 39, the positioning assembly; 40, the fixed block; 41, the compression spring; 42, the moving plate; 43, the positioning column; 44, the guide column; 45, the arc-shaped plate; 46, the rolling wheel. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Reference Manual Attached Figure 1 and Figure 2 As shown, a positioning tool for assembling a rigid tube endoscope comprises: A bottom plate 1, both sides of the top of the bottom plate 1 are integrally connected with conveying guide rails 2, and the conveying guide rails 2 are movably connected with sliders 4 fixed on the pushing cylinders 3, and the pushing cylinders 3 are symmetrically arranged around the center of the bottom plate 1; The eyepiece clamping and docking mechanism 5 includes a first frame 6 placed on the slider 4, a first motor 7 is installed on the first frame 6, an output shaft of the first motor 7 extends to a first rotating tooth 9 on the inner wall of the first cover body 8, the first cover body 8 and the housing of the first motor 7 are fixedly connected by a first rotating rod 10, both ends of the outer wall of the first rotating tooth 9 are meshed with a first gear plate 11 and a second gear plate 12 that move in opposite directions, one end of the first gear plate 11 and the second gear plate 12 are extended to a first clamping assembly 14 connected to the eyepiece 13; wherein the first clamping assembly 14 includes a mold 16 with a tapered groove 15, a through hole 17 placed on the inner wall of the mold 16 is provided at an extension of one end of the tapered groove 15, and an inclined surface connected to the eyepiece 13 is provided in the length direction of the through hole 17; Specifically, the bottom end of the slider 4 is connected to a U-shaped groove connected to the conveying guide rail 2, and the piston rod on the pushing cylinder 3 and the slider 4 are fixedly connected by a bending rod. The conveying guide rail 2 is set in a "mountain shape", and a U-shaped groove is set at the bottom of the slider 4, which can effectively dock and interfere with the conveying guide rail 2, expand the contact surface, and increase the interference limit point, so that under the action of the pushing cylinder 3, it is not easy to deviate from the position during movement.

[0023] A positioning ring 38 is provided at the center of the base plate 1, and the optical cable interface 37 can be inserted into the slot on the positioning ring 38, and then the optical cable interface 37 is further locked and fixed by an adjusting bolt. In addition, a threaded hole is provided on the inner wall of the optical cable interface 37, so as to facilitate the threaded connection of the eyepiece 13 and the working lens tube 26 on the endoscope.

[0024] refer to Figure 1 , Figure 7 , Figure 8 and Fig. 9 , a working mirror tube clamping and docking mechanism 18, the working mirror tube clamping and docking mechanism 18 includes a second frame 19 placed on the slider 4, a second motor 20 is installed on the second frame 19, the output shaft of the second motor 20 extends to the second rotating tooth 22 on the inner wall of the second cover body 21, the second cover body 21 and the housing of the second motor 20 are fixedly connected by a second rotating rod 23, both ends of the outer wall of the second rotating tooth 22 are meshed with a third gear plate 24 and a fourth gear plate 25 that move in the opposite direction, and one end of the third gear plate 24 and the fourth gear plate 25 are extended to the second clamping assembly 27 connected to the working mirror tube 26; The second clamping assembly 27 includes a first rotating disk 28, and the first rotating disk 28 and the second cover body 21 are fixedly connected by a crossbeam 29, one end of the crossbeam 29 passes through the first rotating disk 28 and extends to the outer wall of the second rotating disk 30, and the third gear plate 24 and the fourth gear plate 25 are connected to the upper arc clamping plate 31 and the lower arc clamping plate 32 at the extended ends thereof, and the upper arc clamping plate 31 and the lower arc clamping plate 32 are arranged along the slide groove in the height direction of the first rotating disk 28 and the second rotating disk 30, and the first rotating disk 28 and the second rotating disk 30 are both provided with a central groove 33; Specifically, the extended sections of the third gear plate 24 and the fourth gear plate 25 can pass through the first turntable 28 and extend to the slide groove on the outer wall of the second turntable 30, so that a mechanical linkage effect can be achieved, so that the upper arc clamping plate 31 and the lower arc clamping plate 32 on the first turntable 28 and the second turntable 30 can be simultaneously centered and clamped. In addition, the cross beam 29 between the first turntable 28 and the second turntable 30 can ensure that the second turntable 30 is fixedly connected to the first turntable 28, so as to prevent the upper arc clamping plate 31 and the lower arc clamping plate 32 from mechanically shaking due to the force during the movement, thereby ensuring the stability of the device.

[0025] A working mirror tube clamping and docking mechanism 18 is set. Since the distance of the working mirror tube 26 is relatively long, it can be first placed on the central groove 33 between the first turntable 28 and the second turntable 30. Then, after the second motor 20 is started, it can drive the rotation of the first rotating tooth 9. With the help of the meshing transmission of the gears, the upper arc clamping plate 31 and the lower arc clamping plate 32 at both ends are fixed by centering and clamping. In conjunction with the positioning component 39, the contact area can be reduced by the conical surface on the positioning column 43, thereby increasing the pressure. The positioning component 39 is provided with a movable plate 42 and a compression spring 41 that are movably connected. In this way, comprehensive adaptive clamping and fixing can be achieved around the outer wall of the working mirror tube 26 of different sizes, with good positioning effect and strong application performance, thereby ensuring the orderly docking of the working mirror tube 26 and the optical cable interface 37.

[0026] refer to Figure 1 , Figure 2 and Fig.10The outer walls of the first motor 7 and the second motor 20 are fixedly mounted with turbines 34 placed on the first frame 6 and the second frame 19. The outer wall of the turbine 34 is spirally meshed with a worm 35 fixed on the rotating shaft. One end of the rotating shaft is connected to a handle 36 extending to the outside. As the handle 36 rotates, the turbine 34 drives the eyepiece clamping docking mechanism 5 and the working mirror tube clamping docking mechanism 18 to rotate. In the process of docking the eyepiece 13 and the working mirror tube 26 with the optical cable interface 37, first, under the action of the pushing cylinder 3, the eyepiece 13 and the working mirror tube 26 are connected. 26 is brought close to the optical cable interface 37, and then the worm 35 is rotated by rotating the handle 36, and the turbine 34 drives the first motor 7 and the second motor 20 to rotate by means of the transmission effect of the spiral engagement, so that the clamped eyepiece 13 and the working mirror tube 26 can be effectively threadedly connected under the action of the rotating and pushing cylinder 3, so as to be assembled into the overall structure of the hard tube endoscope, and the speed of manual adjustment can be effectively controlled, the manual operation is convenient, the docking accuracy is high, and the assembly quality is effectively guaranteed.

[0027] A worm gear mechanism is provided, and the first rotating rod 10 and the second rotating rod 23 are provided, so that after the first motor 7 and the second motor 20 are started, the first cover body 8 and the second cover body 21 can be fixedly connected, and the gear transmission member can maintain normal operation. The worm gear mechanism is provided, so that the first motor 7 and the second motor 20 can rotate accordingly, so that the eyepiece clamping and docking mechanism 5 and the working mirror tube clamping and docking mechanism 18 can be driven to rotate as a whole, and a rolling wheel 46 is provided on the working mirror tube clamping and docking mechanism 18, so that the corresponding supporting force can be given and the friction damage can be reduced, thereby ensuring that the first turntable 28 and the second turntable 30 can rotate freely, and the service life of the device is improved. The rolling wheel 46 is arranged in an arc shape, which can be effectively laid on the turntable, thereby expanding the contact surface and saving costs. The design is reasonable, and the pushing cylinder 3 is cooperated, so that the eyepiece 13 and the working mirror tube 26 are threadedly connected with the optical cable interface 37 under the action of rotation and pushing, which effectively ensures the assembly quality, is convenient for manual operation, and has high control accuracy.

[0028] refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 A positioning tool for assembling a rigid tube endoscope also includes a positioning ring 38 placed at the center of the base plate 1 and connected to the optical cable interface 37. The positioning ring 38 is provided with a positioning hole and an adjusting bolt adapted thereto is installed. The eyepiece 13 and one end of the outer wall of the working mirror tube 26 are both provided with threads and are installed on the optical cable interface 37 by means of threaded connection.

[0029] The working mirror tube clamping and docking mechanism 18 also includes a positioning assembly 39 placed at both ends of the center groove 33. The positioning assembly 39 includes a fixed block 40 fixed on the first turntable 28. One end of the outer wall of the fixed block 40 is connected to a movable plate 42 through a compression spring 41. A positioning column 43 is fixedly connected to the movable plate 42. One side of the outer wall of the positioning column 43 is connected to an inwardly inclined conical surface near the center groove 33. The fixed block 40 and the movable plate 42 are connected by a guide column 44. One end of the guide column 44 passes through the movable groove on the fixed block 40 and extends to the outside.

[0030] Specifically, the bottom ends of the first turntable 28 and the second turntable 30 are each provided with an arc-shaped plate 45 fixed to the second frame 19, the arc-shaped plate 45 is arranged along the edge of the outer wall of the first turntable 28 and the second turntable 30 and is provided with an arc-shaped groove, the inner wall of the arc-shaped groove is provided with a rolling wheel 46 connected to the first turntable 28 and the second turntable 30, the first turntable 28 and the second turntable 30 are maintained in parallel, and both ends of the outer walls of the first turntable 28 and the second turntable 30 are provided with slopes placed on the arc-shaped plate 45, the above-mentioned slope setting can play a buffering and guiding role in the connection between the first turntable 28 and the second turntable 30 and the arc-shaped plate 45, even if the two come into contact, it can avoid structural collision damage due to the small force area.

[0031] The transmission ratio between the first rotating tooth 9 and the first gear plate 11 remains the same as the transmission ratio between the first rotating tooth 9 and the second gear plate 12, and the transmission ratio between the second rotating tooth 22 and the third gear plate 24 remains the same as the transmission ratio between the second rotating tooth 22 and the fourth gear plate 25. An electric lifting platform corresponding to the eyepiece clamping and docking mechanism 5 can be provided on the base plate 1, so that the eyepiece 13 can be placed on the table and conveniently clamped and limited accordingly.

[0032] An eyepiece clamping and docking mechanism 5 is provided. After the first motor 7 is started, it can drive the rotation of the first rotating tooth 9. With the help of the meshing transmission of the gears, the molds 16 at both ends are brought close to each other and the eyepiece 13 is clamped and limited. The conical groove 15 on the mold 16 cooperates with the through hole 17, which can better adapt to the shape of the eyepiece with a "large front end and a small rear end". In addition, the inclined surface setting on the through hole 17 can make the eyepiece 13 effectively enter the conical groove 15 when the eyepiece 13 is clamped, and the position of the eyepiece 13 that deviates to a certain extent can be corrected in time. In this way, it can achieve the effect of clamping and fixing while also preventing the eyepiece 13 from deviating in position, thereby improving the accuracy of the clamping position and ensuring the orderly docking of the eyepiece 13 and the optical cable interface 37.

[0033] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0034] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning tool for assembling a rigid tube endoscope, characterized in that: include: A bottom plate (1), wherein both sides of the top of the bottom plate (1) are integrally connected to conveying guide rails (2), and the conveying guide rails (2) are movably connected to sliders (4) fixed on a pushing cylinder (3), and the pushing cylinder (3) is symmetrically arranged around the center of the bottom plate (1); An eyepiece clamping and docking mechanism (5), the eyepiece clamping and docking mechanism (5) comprising a first frame (6) disposed on a slider (4), a first motor (7) being mounted on the first frame (6), an output shaft of the first motor (7) extending to a first rotating tooth (9) on an inner wall of a first cover body (8), the first cover body (8) and a housing of the first motor (7) being fixedly connected via a first rotating rod (10), both ends of an outer wall of the first rotating tooth (9) being meshed with a first gear plate (11) and a second gear plate (12) that move in opposite directions, one end of each of the first gear plate (11) and the second gear plate (12) extending to a first clamping assembly (14) connected to the eyepiece (13); The first clamping assembly (14) comprises a mold (16) having a tapered groove (15), a through hole (17) disposed on the inner wall of the mold (16) is provided at an extension of one end of the tapered groove (15), and an inclined surface connected to the eyepiece (13) is provided in the length direction of the through hole (17); A working mirror tube clamping and docking mechanism (18), the working mirror tube clamping and docking mechanism (18) comprising a second frame (19) disposed on a slide block (4), a second motor (20) being mounted on the second frame (19), an output shaft of the second motor (20) extending to a second rotating tooth (22) on an inner wall of a second cover body (21), the second cover body (21) and a housing of the second motor (20) being fixedly connected via a second rotating rod (23), both ends of an outer wall of the second rotating tooth (22) being meshed with a third gear plate (24) and a fourth gear plate (25) that move in opposite directions, one end of each of the third gear plate (24) and the fourth gear plate (25) extending to a second clamping assembly (27) connected to the working mirror tube (26); The second clamping assembly (27) comprises a first rotating disk (28), the first rotating disk (28) and the second cover body (21) are fixedly connected via a crossbeam (29), one end of the crossbeam (29) passes through the first rotating disk (28) and extends to the outer wall of the second rotating disk (30), and the extended parts of one end of the third gear plate (24) and the fourth gear plate (25) are correspondingly connected to the upper arc clamping plate (31) and the lower arc clamping plate (32), the upper arc clamping plate (31) and the lower arc clamping plate (32) are arranged along the slide grooves in the height direction of the first rotating disk (28) and the second rotating disk (30), and the first rotating disk (28) and the second rotating disk (30) are both provided with a central groove (33); A turbine (34) disposed on the first frame (6) and the second frame (19) is fixedly mounted on the outer wall of each of the first motor (7) and the second motor (20); a worm (35) fixed on a rotating shaft is spirally meshed on the outer wall of the turbine (34); one end of the rotating shaft is connected to a rotating handle (36) extending to the outside; as the rotating handle (36) rotates, the turbine (34) drives the eyepiece clamping and docking mechanism (5) and the working lens tube clamping and docking mechanism (18) to rotate.

2. A positioning tool for assembling a rigid tube endoscope according to claim 1, characterized in that: It also includes a positioning ring (38) which is placed at the center of the base plate (1) and connected to the optical cable interface (37); the positioning ring (38) is provided with a positioning hole and is equipped with an adjustment bolt which matches the positioning hole.

3. A positioning tool for assembling a rigid tube endoscope according to claim 2, characterized in that: The eyepiece (13) and the working lens tube (26) are both provided with threads at one end of their outer walls and are mounted on the optical cable interface (37) by means of threaded connection.

4. The positioning tool for assembling a rigid tube endoscope according to claim 1, characterized in that: The working mirror tube clamping and docking mechanism (18) further comprises positioning components (39) disposed at both ends of the central groove (33), the positioning components (39) comprising a fixed block (40) fixed on the first rotating disk (28), one end of the outer wall of the fixed block (40) being connected to a moving plate (42) via a compression spring (41), a positioning column (43) being fixedly connected to the moving plate (42), and one side of the outer wall of the positioning column (43) being connected to an inwardly inclined conical surface near the central groove (33).

5. The positioning tool for assembling a rigid tube endoscope according to claim 4, characterized in that: The fixed block (40) and the movable plate (42) are connected via a guide column (44), and one end of the guide column (44) passes through a movable slot on the fixed block (40) and extends to the outside.

6. A positioning tool for assembling a rigid tube endoscope according to claim 4, characterized in that: The bottom ends of the first rotating disk (28) and the second rotating disk (30) are both provided with an arc-shaped plate (45) fixed to the second frame (19); the arc-shaped plate (45) is arranged along the outer wall edge of the first rotating disk (28) and the second rotating disk (30) and is provided with an arc-shaped groove; the inner wall of the arc-shaped groove is provided with a rolling wheel (46) connected to the first rotating disk (28) and the second rotating disk (30).

7. A positioning tool for assembling a rigid tube endoscope according to claim 6, characterized in that: The first rotating disk (28) and the second rotating disk (30) are arranged in parallel, and both ends of the outer walls of the first rotating disk (28) and the second rotating disk (30) are provided with slope surfaces placed on the arc-shaped plate (45).

8. The positioning tool for assembling a rigid tube endoscope according to claim 1, characterized in that: The bottom end of the slider (4) is connected to a U-shaped groove connected to the conveying guide rail (2), and the piston rod on the push cylinder (3) and the slider (4) are fixedly connected via a bent rod.

9. The positioning tool for assembling a rigid tube endoscope according to claim 1, characterized in that: The transmission ratio between the first rotating tooth (9) and the first gear plate (11) remains the same as the transmission ratio between the first rotating tooth (9) and the second gear plate (12), and the transmission ratio between the second rotating tooth (22) and the third gear plate (24) remains the same as the transmission ratio between the second rotating tooth (22) and the fourth gear plate (25).

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