Lead screw of a medical endoscope motor

Abstract

The utility model discloses a lead screw of a medical endoscope motor, comprising a shell, wherein a lead screw adjustment mechanism is installed inside the shell. The utility model drives the lead screw to rotate through the endoscope motor, thereby adjusting the position of the endoscope lens as needed, changing the focal length, and realizing microscopic photography. Compared with the traditional electronic adjustment, the image is clearer and the distortion is reduced. In addition, an oil storage tank, an oil filling pipe, a sealing plug, and an oil outlet are arranged between the nut and the limit block, so that the lead screw can be lubricated and protected during the adjustment process, friction can be reduced and wear can be prevented, thereby improving the service life of the lead screw and extending the use time of the endoscope. A buffer component is arranged on one side of the nut, and when the buffer plate is hit, the piston plate squeezes the elastic member, thereby achieving the effect of buffer protection, reducing the collision of the nut during the adjustment process, and improving the service life of the nut.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a lead screw of a medical endoscope motor. Background Art

[0002] With the popularity of non-invasive surgery, the application of medical endoscopes is becoming more and more extensive, and most endoscopes use electronic focusing. In order to observe the affected area more clearly during surgery and reduce image distortion, using micro servo motors for CNC optical focusing is a significant solution. In order to achieve optical focusing in endoscopes and precise micro-displacement of the lens, a micro servo motor is needed to drive the lead screw to rotate, thereby driving the lens for adjustment.

[0003] During operation, the existing lead screw causes certain damage due to friction and wear, and lubricating oil needs to be added to extend the service life of the lead screw. In addition, most nuts on the lead screw are not provided with a buffer protection structure, which causes the nut to collide and be damaged during the adjustment of the endoscope lens, thereby reducing the service life of the nut. Utility Model Content

[0004] The utility model aims to provide a lead screw of a medical endoscope motor to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a lead screw of a medical endoscope motor, comprising a housing, wherein a lead screw adjustment mechanism is installed inside the housing.

[0006] The lead screw adjustment mechanism includes an endoscope motor, which is arranged inside the shell. A reduction box is arranged on the output end of the endoscope motor. A lead screw is fixedly connected inside the reduction box. A nut is threadedly connected to the outer wall of the lead screw, and a buffer component is installed on the outer surface of one side of the nut.

[0007] In the above technical solution, the lead screw is rotated by driving the endoscope motor, so that the position of the endoscope lens can be adjusted as needed, the focal length can be changed, and microscopic photography can be achieved. Compared with traditional electronic adjustment, the image is clearer and the distortion is reduced.

[0008] As a further preferred embodiment of the present technical solution, one end of the outer shell is threadedly connected to a connecting shell, and the other end of the connecting shell is bolted to a fixing cover.

[0009] In the above technical solution, by removing the fixed cover and moving the nut, the nut is located at the opening, which facilitates the filling of oil into the oil storage tank through the oil filling pipe.

[0010] As a further preferred embodiment of the technical solution, the inner wall of the connecting shell is slidably connected to a limiting groove, and a buffer ring is provided on the inner wall of one end of the connecting shell close to the fixed cover.

[0011] In the above technical solution, the buffer ring provided can further protect the nut and reduce damage.

[0012] As a further preferred embodiment of the present technical solution, one end of the nut close to the fixing cover is fixedly connected to a connecting tube, and the other end of the connecting tube is fixedly connected to an endoscope lens, and the endoscope lens is located outside the connecting shell.

[0013] As a further preferred embodiment of the present technical solution, an oil storage groove is provided at one end of the nut close to the lead screw, the outer surface of the nut is fixedly connected to a limiting block, the outer surface of the limiting block is slidably connected to an inner wall of a limiting groove, an oil filling pipe is provided between the nut and the limiting block, a sealing plug is provided at the upper end of the oil filling pipe, and an oil outlet hole is provided on the inner side of the oil storage groove.

[0014] In the above technical solution, the lead screw can be lubricated and protected during the adjustment process, reducing friction and preventing wear, thereby increasing the service life of the lead screw and extending the use time of the endoscope.

[0015] As a further preferred embodiment of the present technical solution, the buffer assembly includes a mounting cylinder, the mounting cylinder is arranged on the outer surface of the nut, two limiting grooves are provided on the inner wall of the mounting cylinder, an elastic member is provided in the mounting cylinder, a piston plate is provided at the other end of the elastic member, a connecting rod is fixedly connected to the piston plate near the opening, and a buffer plate is fixedly connected to the other end of the connecting rod.

[0016] In the above technical solution, when the buffer plate is hit, the piston plate squeezes the elastic member, thereby achieving a buffer protection effect, reducing the collision of the nut during the adjustment process, and increasing the service life of the nut.

[0017] As a further preferred embodiment of the technical solution, the outer surface of the piston plate is fixedly connected to a second limiting block, and the outer wall of the second limiting block is slidably connected to the inner wall of the second limiting groove.

[0018] The utility model provides a lead screw of a medical endoscope motor, which has the following beneficial effects:

[0019] (1) The utility model drives the lead screw to rotate through the endoscope motor drive, and then can adjust the position of the endoscope lens as needed, change the focal length, and realize microscopic photography. Compared with the traditional electronic adjustment, the image is clearer and the distortion is reduced. In addition, an oil storage tank, an oil filling pipe, a sealing plug and an oil outlet are arranged between the nut and the limit block, which can lubricate and protect the lead screw during the adjustment process, reduce friction and prevent wear, thereby increasing the service life of the lead screw and extending the use time of the endoscope.

[0020] (2) The utility model provides a buffer assembly on one side of the nut. When the buffer plate is hit, the piston plate squeezes the elastic member, thereby achieving a buffer protection effect, reducing the impact on the nut during the adjustment process and increasing the service life of the nut. The buffer ring provided in addition can further protect the nut and reduce damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a cross-sectional view of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the buffer ring of the utility model;

[0024] Figure 4 It is an enlarged view of Figure B of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the buffer component of the utility model;

[0026] Figure 6 It is an enlarged view of Figure A of the utility model;

[0027] In the figure: 1. outer shell; 2. lead screw adjustment mechanism; 11. connecting shell; 12. fixing cover; 13. limit groove 1; 14. buffer ring; 21. endoscope motor; 22. reduction box; 23. lead screw; 24. nut; 25. connecting pipe; 26. endoscope lens; 27. buffer assembly; 241. oil storage tank; 242. oil filling pipe; 243. sealing plug; 244. oil outlet hole; 245. limit block 1; 271. mounting tube; 272. elastic member; 273. piston plate; 274. limit block 2; 275. limit groove 2; 276. connecting rod; 277. buffer plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] The utility model provides a technical solution: Figure 1and Figure 3 As shown, in the present embodiment, a lead screw of a medical endoscope motor comprises a shell 1, a lead screw adjustment mechanism 2 is installed inside the shell 1, a connecting shell 11 is threadedly connected to one end of the shell 1, a fixing cover 12 is bolted to the other end of the connecting shell 11, the inner wall of the connecting shell 11 is slidably connected to a limiting groove 13, a buffer ring 14 is arranged on the inner wall of one end of the connecting shell 11 close to the fixing cover 12, the arranged buffer ring 14 can further protect the nut 24 and reduce damage, and 245 slides in 13 during the adjustment process, which can improve the stability of the movement of the nut 24 on the lead screw 23.

[0030] like Figure 2 and Figure 4 As shown, the lead screw adjustment mechanism 2 includes an endoscope motor 21, which is arranged inside the housing 1, and a reduction box 22 is arranged on the output end of the endoscope motor 21. A lead screw 23 is fixedly connected inside the reduction box 22. The thread outer diameter of the lead screw 23 is designed to be φ1.4mm, and the pitch is designed to be 0.2mm, which can meet the requirements of medical endoscopes for small size, light weight, and high micro-control accuracy. The outer wall of the lead screw 23 is threadedly connected to a nut 24, and a buffer component 27 is installed on the outer surface of one side of the nut 24. The end of the nut 24 close to the fixed cover 12 is fixedly connected to a connecting tube 25, and the other end of the connecting tube 25 is fixedly connected to an endoscope lens 26, and the endoscope lens 26 is located outside the connecting shell 11. An oil storage tank 241 is provided at the end of the nut 24 close to the lead screw 23, and a limit block is fixedly connected to the outer surface of the nut 24 145, the outer surface of the limit block 245 is slidably connected with the inner wall of the limit groove 13, an oil filling pipe 242 is provided between the nut 24 and the limit block 245, a sealing plug 243 is provided at the upper end of the oil filling pipe 242, and an oil outlet hole 244 is provided on the inner side of the oil storage tank 241. The lead screw 23 is driven by the endoscope motor 21 to rotate, so that the position of the endoscope lens 26 can be adjusted as needed, the focal length can be changed, and microscopic photography can be realized. Compared with traditional electronic adjustment, the image is clearer and the distortion is reduced. In addition, the oil storage tank 241, the oil filling pipe 242, the sealing plug 243 and the oil outlet hole 244 are provided between the nut 24 and the limit block 245, which can lubricate and protect the lead screw 23 during the adjustment process, reduce friction and prevent wear, thereby increasing the service life of the lead screw 23 and extending the use time of the endoscope.

[0031] like Figure 5 and Figure 6As shown, the buffer assembly 27 includes a mounting cylinder 271, which is arranged on the outer surface of the nut 24. The inner wall of the mounting cylinder 271 is provided with a limiting groove 275. An elastic member 272 is arranged in the mounting cylinder 271. A piston plate 273 is arranged at the other end of the elastic member 272. The piston plate 273 is fixedly connected with a connecting rod 276 near the opening, and the other end of the connecting rod 276 is fixedly connected with a buffer plate 277. The outer surface of the piston plate 273 is fixedly connected with a limiting block 274. The outer wall of the limiting block 274 is slidably connected with the inner wall of the limiting groove 275. By arranging the buffer assembly 27 on one side of the nut 24, when the buffer plate 273 is hit, the piston plate 273 squeezes the elastic member 272, thereby achieving a buffer protection effect, reducing the collision of the nut 24 during the adjustment process, and improving the service life of the nut 24.

[0032] The utility model provides a lead screw of a medical endoscope motor, and the specific working principle is as follows: the lead screw 23 is driven to rotate by the endoscope motor 21 in forward and reverse rotation, so that the nut 24 moves forward or backward on the lead screw 23, and at the same time, the limit block 245 slides in the limit groove 13, so that the endoscope lens 26 is adjusted, and then the focal length can be adjusted to achieve microscopic photography, and when the nut 24 moves on the lead screw 23, the lubricating oil stored in the oil storage tank 241 leaks through the oil outlet 244, so that the lead screw 23 can be lubricated, friction is reduced and wear is prevented; when the buffer plate 273 is hit, the piston plate 273 squeezes the elastic member 272, so as to achieve the effect of buffer protection, and reduce the collision of the nut 24 during the adjustment process.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lead screw of a medical endoscope motor, comprising a housing (1), characterized in that: A lead screw adjustment mechanism (2) is installed inside the housing (1); The lead screw adjustment mechanism (2) comprises an endoscope motor (21), the endoscope motor (21) is arranged inside the housing (1), a reduction box (22) is arranged on the output end of the endoscope motor (21), a lead screw (23) is fixedly connected inside the reduction box (22), a nut (24) is threadedly connected to the outer wall of the lead screw (23), and a buffer component (27) is installed on the outer surface of one side of the nut (24).

2. The lead screw of a medical endoscope motor according to claim 1, characterized in that: One end of the outer shell (1) is threadedly connected to a connecting shell (11), and the other end of the connecting shell (11) is boltedly connected to a fixing cover (12).

3. The lead screw of a medical endoscope motor according to claim 2, characterized in that: The inner wall of the connection shell (11) is slidably connected to a limiting groove (13), and a buffer ring (14) is provided on the inner wall of one end of the connection shell (11) close to the fixed cover (12).

4. The lead screw of a medical endoscope motor according to claim 1, characterized in that: One end of the nut (24) close to the fixed cover (12) is fixedly connected to a connecting tube (25), and the other end of the connecting tube (25) is fixedly connected to an endoscope lens (26), and the endoscope lens (26) is located outside the connecting shell (11).

5. The lead screw of a medical endoscope motor according to claim 1, characterized in that: An oil storage groove (241) is provided at one end of the nut (24) close to the lead screw (23); a limiting block (245) is fixedly connected to the outer surface of the nut (24); the outer surface of the limiting block (245) is slidably connected to the inner wall of the limiting groove (13); an oil injection pipe (242) is provided between the nut (24) and the limiting block (245); a sealing plug (243) is provided at the upper end of the oil injection pipe (242); and an oil outlet hole (244) is provided on the inner side of the oil storage groove (241).

6. The lead screw of a medical endoscope motor according to claim 1, characterized in that: The buffer assembly (27) comprises a mounting tube (271), the mounting tube (271) being arranged on the outer surface of the nut (24), the inner wall of the mounting tube (271) being provided with a second limiting groove (275), an elastic member (272) being arranged in the mounting tube (271), a piston plate (273) being arranged at the other end of the elastic member (272), a connecting rod (276) being fixedly connected to the piston plate (273) near the opening, and a buffer plate (277) being fixedly connected to the other end of the connecting rod (276).

7. The lead screw of a medical endoscope motor according to claim 6, characterized in that: The outer surface of the piston plate (273) is fixedly connected to the second limiting block (274), and the outer wall of the second limiting block (274) is slidably connected to the inner wall of the second limiting groove (275).

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