Lifting device capable of being finely adjusted

Abstract

The invention discloses a lifting device capable of being finely adjusted, belongs to the technical field of medical equipment, and aims to solve the problems that an existing lifting device cannot be suitable for lifting two arms or two legs at the same time, and the function is single. After the electric push rod is lifted by a certain distance, the height is finely adjusted through the fine adjustment assembly, the accuracy of the equipment during height supporting position adjustment is further improved, then the stepping motor is driven, flexible adjustment of the positions of the first arc-shaped plate and the second arc-shaped plate is achieved, the two legs or the two arms of a patient can be supported at the same time, and the operation is convenient. The device can support a single leg or a single arm, the connecting plate can be selected for horizontal supporting or vertical supporting according to specific conditions when the single leg or the single arm is supported, and the device can be applied to different treatment scenes due to the multifunctionality and wide applicability of the device. More comfortable supporting experience is provided for the patient, and the practical value and the use value are improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, in particular to a finely adjustable lifter. Background Art

[0002] A lifter is a medical surgical care instrument used to raise the patient's arms or legs. Patients with fractures should use a lifter to raise the affected limb during the recovery period after plaster fixation or surgery, and keep the patient's limb in an elevated position. This is beneficial to venous blood return, can prevent or reduce local swelling, and promote fracture healing.

[0003] Chinese patent document CN220530279U discloses a lower limb lifter, including a mounting plate, a fixed frame fixedly connected to the right end of the mounting plate, a movable plate on the right side of the fixed frame, and a lifting adjustment mechanism and an auxiliary mechanism respectively provided between the movable plate and the fixed frame, a cushion fixedly connected to the upper end of the movable plate, a pair of hooks fixedly connected to the left end of the mounting plate, and a locking mechanism provided on the hooks. Although the device can lift the limbs, it has limitations and cannot be used to lift two arms or two legs at the same time. It can only be used to lift a single leg or arm, which limits its extensiveness and flexibility in practical applications.

[0004] Therefore, to solve such problems, we propose a fine-tunable lifter. Summary of the invention

[0005] The object of the present invention is to provide a finely adjustable lifter, aiming to solve the problem in the above-mentioned background technology that it is not applicable to lifting two arms or two legs at the same time and has a single function.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fine-adjustable lifter comprises a base, the upper end of the base is evenly fixedly connected with four electric push rods, the upper ends of the electric push rods are fixedly connected with a connecting seat, a fine-adjustment component is arranged inside the connecting seat, the upper end of the connecting seat is movably connected with a mounting seat, the side wall of the mounting seat is fixedly connected with a stepping motor, the output end of the stepping motor is fixedly connected with a second rotating column, the second rotating column is fixedly connected with a first gear, the side wall of the first gear is meshingly connected with the second gear, the inside of the second gear is fixedly connected with a third rotating column, the first gear and the second gear are both positioned and rotatably connected inside the mounting seat, the ends of the third rotating column and the second rotating column away from the stepping motor both penetrate the side wall of the mounting seat, the side walls of the third rotating column and the second rotating column are movably connected with a connecting plate, the connecting plate is slidably connected to the side wall of the mounting seat, one end of the connecting plate is fixedly connected with a first arc plate, the end of the first arc plate away from the connecting plate is provided with a second mounting groove, the inner wall of the second mounting groove is fixedly connected with a fourth rotating column, the side wall of the fourth rotating column is movably connected with the second arc plate, and a limiting component is arranged at the lower end of the first arc plate.

[0007] Preferably, a locking assembly is provided at the end of the second rotating column and the third rotating column away from the stepping motor, and the locking assembly includes a fourth mounting groove, and the fourth mounting groove is located at the end of the second rotating column and the third rotating column away from the stepping motor, a first spring is fixedly connected to the inner wall of the fourth mounting groove, one end of the first spring is fixedly connected to a connecting column, the connecting column is slidably connected to the inner wall of the fourth mounting groove, a pull plate is fixedly connected to the end of the connecting column away from the first spring, a lock column is fixedly connected to one end of the pull plate, and a plurality of first card grooves are evenly arranged on the side wall of the connecting plate.

[0008] Preferably, the limiting assembly includes an installation frame, which is fixedly connected to the side wall of the first arc-shaped plate, and a second limiting plate is slidably connected to the inner wall of the installation frame, two second slots are provided on both side walls of the second limiting plate, and a third installation slot is provided on both side walls of the installation frame, a pull column is provided inside the third installation slot, and a third limiting plate is fixedly connected to the side wall of the pull column, the third limiting plate is slidably connected to the inner wall of the third installation slot, and a second spring is movably sleeved on the side wall of the pull column, and two ends of the second spring are respectively fixedly connected to the third limiting plate and the inner wall of the third installation slot.

[0009] Preferably, a first mounting groove is formed on the side wall of the connecting seat, and the fine-tuning assembly includes a threaded column, the threaded column passes through the connecting seat, the upper end of the threaded column is movably connected to the lower end of the mounting seat, the side wall of the threaded column is threadedly connected to a third gear, the third gear is positioned and rotatably connected inside the first mounting groove, the side wall of the third gear is meshingly connected to a fourth gear, the lower end of the fourth gear is fixedly connected to the first rotating column, the lower end of the first rotating column is fixedly connected to a rotating block, the lower end of the rotating block and the upper end of the fourth gear are movably connected to the inner wall of the first mounting groove through a pin shaft.

[0010] Preferably, an oblique groove is formed on the inner bottom wall of the second installation groove, and a clamping block is fixedly connected to the inner bottom wall of the second installation groove.

[0011] Preferably, a slide groove is provided on the inner side wall of the installation frame, and both side walls of the second limiting plate are fixedly connected with a stopper, and the stopper is slidably connected to the inner wall of the slide groove.

[0012] Preferably, four through holes are evenly opened on the upper end of the connecting seat, the lower end of the mounting seat is fixedly connected to a limiting column, the limiting column is slidably connected to the inner wall of the through hole, the lower end of the limiting column is fixedly connected to a first limiting plate, the lower end of the connecting seat is fixedly connected to a protective shell, and the limiting column is located inside the protective shell.

[0013] Preferably, a limiting groove is provided on the side wall of the mounting seat, a limiting ring is fixedly connected to the side wall of the connecting plate, and the limiting ring is slidably connected to the inner wall of the limiting groove.

[0014] Preferably, a pull block is fixedly connected to the lower end of the second limiting plate, a placement groove is opened at the lower end of the installation frame, and the pull block is slidably connected to the inner wall of the placement groove.

[0015] Preferably, the fourth mounting groove is shaped like a prism, and the connecting column is shaped like a T-shaped prism.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention proposes a fine-adjustable lifter, which raises one end of the device by an electric push rod and then uses a fine-adjustment component to fine-tune the height, thereby further improving the accuracy of the device in adjusting the height support position, and secondly driving the stepper motor to realize flexible adjustment of the positions of the first arc plate and the second arc plate, so that it can not only support the patient's two legs or two arms at the same time, but also meet the support needs of a single leg or a single arm. When supporting a single leg or a single arm, the connecting plate can be selected for horizontal support or vertical support according to the specific situation. Its versatility and wide applicability enable the device to be applied to different treatment scenarios, providing patients with a more comfortable support experience, thereby improving its practical value and use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional schematic diagram of the present invention Figure 1 ;

[0019] Figure 2 A three-dimensional schematic diagram of the present invention Figure 2 ;

[0020] Figure 3 A three-dimensional schematic diagram of the present invention Figure 3 ;

[0021] Figure 4 It is a three-dimensional exploded schematic diagram of the mounting seat in the present invention;

[0022] Figure 5 It is a three-dimensional exploded schematic diagram of the connecting seat in the present invention;

[0023] Figure 6 It is a three-dimensional exploded schematic diagram of the installation frame in the present invention;

[0024] Figure 7 It is a three-dimensional exploded schematic diagram of the limiting component in the present invention;

[0025] Figure 8 It is a three-dimensional exploded schematic diagram of the locking assembly in the present invention.

[0026] Legend:

[0027] 1. Base; 11. Electric push rod; 12. Connecting seat; 121. First mounting slot; 122. Through hole; 13. Fine adjustment assembly; 131. Threaded column; 132. Third gear; 133. Fourth gear; 134. First rotating column; 135. Rotating block; 14. Limiting column; 141. First limiting plate; 15. Mounting seat; 151. Limiting slot; 16. Protective shell; 2. Stepping motor; 21. Second rotating column; 211. Locking assembly; 2111. Fourth mounting slot; 2112. First spring; 2113. Connecting column; 2114. Pull plate; 2115. Locking column ; 2116, first slot; 22, first gear; 23, second gear; 24, third rotating column; 25, connecting plate; 251, limiting ring; 26, first arc plate; 261, second mounting slot; 262, inclined slot; 263, blocking block; 27, fourth rotating column; 28, second arc plate; 29, limiting assembly; 291, mounting frame; 292, second limiting plate; 293, second slot; 294, third mounting slot; 295, pulling column; 296, third limiting plate; 297, second spring; 298, sliding slot; 299, blocking block; 3, pulling block; 31, placement slot. DETAILED DESCRIPTION

[0028] 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.

[0029] In order to solve the problem that the existing system cannot lift two arms or two legs at the same time and has a single function, please refer to Figure 1-Figure 5 , providing the following preferred technical solutions.

[0030] An embodiment of the present invention: a fine-adjustable lifter, comprising a base 1, four electric push rods 11 are evenly fixedly connected to the upper end of the base 1, a connecting seat 12 is fixedly connected to the upper end of the electric push rod 11, a fine-adjustment component 13 is arranged inside the connecting seat 12, a mounting seat 15 is movably connected to the upper end of the connecting seat 12, a stepper motor 2 is fixedly connected to the side wall of the mounting seat 15, a second rotating column 21 is fixedly connected to the output end of the stepper motor 2, a first gear 22 is fixedly connected to the second rotating column 21, a second gear 23 is meshedly connected to the side wall of the first gear 22, a third rotating column 24 is fixedly connected to the inside of the second gear 23, the first gear 22 and the second gear 22 are fixedly connected to the third rotating column 24, 23 are both positioned and rotatably connected inside the mounting seat 15, the third rotating column 24 and the second rotating column 21 at one end away from the stepper motor 2 both penetrate the side wall of the mounting seat 15, the side walls of the third rotating column 24 and the second rotating column 21 are both movably connected with a connecting plate 25, the connecting plate 25 is slidably connected to the side wall of the mounting seat 15, one end of the connecting plate 25 is fixedly connected with a first arc plate 26, the end of the first arc plate 26 away from the connecting plate 25 is provided with a second mounting groove 261, the inner wall of the second mounting groove 261 is fixedly connected with a fourth rotating column 27, the side wall of the fourth rotating column 27 is movably connected with a second arc plate 28, and a limiting component 29 is provided at the lower end of the first arc plate 26.

[0031] Specifically, by determining the height to be raised, and then starting the electric push rod 11, the electric push rod 11 drives the connecting seat 12 and the mounting seat 15 to rise to an appropriate range, and then starting the stepper motor 2, the stepper motor 2 drives the second rotating column 21 to rotate, the second rotating column 21 drives the first gear 22 to rotate, the first gear 22 drives the second gear 23 to rotate, the second gear 23 drives the third rotating column 24 to rotate, the second rotating column 21 and the third rotating column 24 simultaneously drive the connecting plate 25 to rotate, and the connecting plate 25 drives the first arc plate 26 and the second arc plate 28 to rotate. If the patient's two legs or two arms When support is required for both legs or arms, the adjustable connecting plate 25 can be parallel to the horizontal plane, and then the first curved plate 26 and the second curved plate 28 can be adjusted to be placed horizontally to support them. When the patient only needs to support one leg or one arm, the adjustable connecting plate 25 can be perpendicular to the placement surface, and then the limit assembly 29 on the second curved plate 28 is released, and then the two first curved plates 26 are used to support them, so that it can support the simultaneous support of the patient's two legs or two arms, and can also meet the support needs of a single leg or a single arm. This versatility enables the device to be widely used in different treatment scenarios, thereby improving the practical value of the device.

[0032] The second rotating column 21 and the third rotating column 24 are each provided with a locking assembly 211 at one end away from the stepper motor 2. The locking assembly 211 includes a fourth mounting groove 2111. The fourth mounting groove 2111 is located at one end of the second rotating column 21 and the third rotating column 24 away from the stepper motor 2. The inner wall of the fourth mounting groove 2111 is fixedly connected with a first spring 2112. One end of the first spring 2112 is fixedly connected with a connecting column 2113. The connecting column 2113 is slidably connected to the inner wall of the fourth mounting groove 2111. The end of the connecting column 2113 away from the first spring 2112 is fixedly connected with a pull plate 2114. One end of the pull plate 2114 is fixedly connected with a lock column 2115. The side wall of the connecting plate 25 is evenly provided with a plurality of first card grooves 2116.

[0033] Specifically, when the patient only needs to support one leg or one arm, one group of connecting plates 25 can be adjusted to be placed horizontally, and one group of connecting plates 25 can be placed vertically, thereby providing another group of elevated placement methods to further increase the use value of the equipment. Specifically, the pull plate 2114 is pulled so that the pull plate 2114 drives the connecting column 2113 to slide on the inner wall of the fourth mounting groove 2111, and stretches the first spring 2112, thereby releasing the locking column 2115 from the first slot 2116. After rotating the connecting plate 25 to place it vertically, the pull plate 2114 is released, and the elastic force of the first spring 2112 is used to re-engage the locking column 2115 with the first slot 2116.

[0034] The limiting assembly 29 includes a mounting frame 291, which is fixedly connected to the side wall of the first arc-shaped plate 26. A second limiting plate 292 is slidably connected to the inner wall of the mounting frame 291. Two second slots 293 are provided on both side walls of the second limiting plate 292. A third mounting groove 294 is provided on both side walls of the mounting frame 291. A pull column 295 is provided inside the third mounting groove 294. A third limiting plate 296 is fixedly connected to the side wall of the pull column 295. The third limiting plate 296 is slidably connected to the inner wall of the third mounting groove 294. A second spring 297 is movably sleeved on the side wall of the pull column 295. Both ends of the second spring 297 are respectively fixedly connected to the third limiting plate 296 and the inner wall of the third mounting groove 294.

[0035] Specifically, the second limiting plate 292 is used to limit the first curved plate 26 and the second curved plate 28. When the limiting of the first curved plate 26 and the second curved plate 28 is released, the pull column 295 is pulled, so that the pull column 295 drives the third limiting plate 296 to slide and connect on the inner wall of the third mounting groove 294, and squeezes the second spring 297, thereby releasing the engagement connection between one end of the pull column 295 and the second slot 293, and then pushing the second limiting plate 292 to slide into the appropriate position in the mounting frame 291, releasing the pull column 295, so that one end of the pull column 295 is engaged and connected with another second slot 293, thereby limiting the second limiting plate 292.

[0036] A first mounting groove 121 is formed on the side wall of the connecting seat 12, and the fine-tuning component 13 includes a threaded column 131, which passes through the connecting seat 12, and the upper end of the threaded column 131 is movably connected to the lower end of the mounting seat 15. The side wall of the threaded column 131 is threadedly connected with a third gear 132, and the third gear 132 is positioned and rotatably connected inside the first mounting groove 121. The side wall of the third gear 132 is meshedly connected with a fourth gear 133, and the lower end of the fourth gear 133 is fixedly connected to the first rotating column 134, and the lower end of the first rotating column 134 is fixedly connected to a rotating block 135, and the lower end of the rotating block 135 and the upper end of the fourth gear 133 are both movably connected to the inner wall of the first mounting groove 121 through a pin.

[0037] Specifically, by rotating the rotating block 135, the rotating block 135 drives the first rotating column 134 to rotate, and the first rotating column 134 drives the fourth gear 133 to rotate, and the fourth gear 133 drives the third gear 132 to rotate, and the third gear 132 drives the threaded column 131, and the threaded column 131 drives the mounting seat 15 to rise, and then the fourth gear 133 with a smaller radius drives the third gear 132 with a larger radius to rotate, so as to achieve fine-tuning and precise control of the height. Compared with directly using the electric push rod 11 to adjust the height, the problem of reduced control accuracy caused by the step angle of the motor in the electric push rod 11, the return error of the reduction mechanism, and electromagnetic interference or power supply fluctuation is solved. When fine-tuning is performed, the rotating block 135 can be directly rotated, which is simple to operate and has high accuracy.

[0038] Furthermore, in order to enhance the stability of the device, Figure 4-Figure 8 As shown, the following preferred technical solutions are provided.

[0039] An inclined groove 262 is provided on the inner bottom wall of the second mounting groove 261, and a clamping block 263 is fixedly connected to the inner bottom wall of the second mounting groove 261, which is used to limit the second curved plate 28 by means of the clamping block 263 to prevent the second curved plate 28 from excessively flipping toward the inner wall of the first curved plate 26, and secondly, the inclined groove 262 is used to increase the flipping range of the second curved plate 28 toward the outer wall of the first curved plate 26.

[0040] A slide groove 298 is provided on the inner wall of the installation frame 291, and both side walls of the second limiting plate 292 are fixedly connected with a stopper 299, which is slidably connected to the inner wall of the slide groove 298 to limit the slide groove 298 by the stopper 299 to prevent the second limiting plate 292 from detaching from the installation frame 291.

[0041] Four through holes 122 are evenly opened at the upper end of the connecting seat 12, and the lower end of the mounting seat 15 is fixedly connected to the limiting column 14, and the limiting column 14 is slidably connected to the inner wall of the through hole 122. The lower end of the limiting column 14 is fixedly connected to the first limiting plate 141, and the lower end of the connecting seat 12 is fixedly connected to the protective shell 16. The limiting column 14 is located inside the protective shell 16, and is used to limit the mounting seat 15 by using the limiting column 14, thereby increasing the rising stability of the mounting seat 15.

[0042] The side wall of the mounting seat 15 is provided with a limiting groove 151 , and the side wall of the connecting plate 25 is fixedly connected with a limiting ring 251 , and the limiting ring 251 is slidably connected to the inner wall of the limiting groove 151 , so as to limit the connecting plate 25 by the limiting ring 251 , thereby increasing the stability of the connecting plate 25 .

[0043] The second limiting plate 292 is fixedly connected with a pulling block 3 at its lower end. A placement groove 31 is provided at the lower end of the mounting frame 291. The pulling block 3 is slidably connected to the inner wall of the placement groove 31. The placement groove 31 is used to place the pulling block 3 and drive the second limiting plate 292.

[0044] The fourth mounting groove 2111 is shaped like a prism, and the connecting column 2113 is shaped like a T-shaped prism. The prismatic structure is used to limit the connecting column 2113 to prevent the connecting column 2113 from rotating on the inner wall of the fourth mounting groove 2111. At the same time, the T-shaped structure is used to perform secondary limiting on the connecting column 2113 to prevent the connecting column 2113 from detaching from the fourth mounting groove 2111.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] 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 finely adjustable lifter, comprising a base (1), characterized in that: The upper end of the base (1) is evenly and fixedly connected to four electric push rods (11), the upper end of the electric push rod (11) is fixedly connected to a connecting seat (12), a fine adjustment component (13) is arranged inside the connecting seat (12), the upper end of the connecting seat (12) is movably connected to a mounting seat (15), the side wall of the mounting seat (15) is fixedly connected to a stepping motor (2), the output end of the stepping motor (2) is fixedly connected to a second rotating column (21), the second rotating column (21) is fixedly connected to a first gear (22), the side wall of the first gear (22) is meshingly connected to a second gear (23), the second gear (23) is fixedly connected to a third rotating column (24), the first gear (22) and the second gear (23) are both fixedly connected inside the mounting seat (15). The third rotating column (24) and the second rotating column (21) are rotatably connected to each other at one end away from the stepping motor (2), and the ends thereof both penetrate the side wall of the mounting seat (15). The side walls of the third rotating column (24) and the second rotating column (21) are both movably connected with a connecting plate (25). The connecting plate (25) is slidably connected with the side wall of the mounting seat (15). One end of the connecting plate (25) is fixedly connected with a first arc-shaped plate (26). An end of the first arc-shaped plate (26) away from the connecting plate (25) is provided with a second mounting groove (261). The inner wall of the second mounting groove (261) is fixedly connected with a fourth rotating column (27). The side wall of the fourth rotating column (27) is movably connected with a second arc-shaped plate (28). A limiting component (29) is provided at the lower end of the first arc-shaped plate (26).

2. A finely adjustable lifter according to claim 1, characterized in that: The second rotating column (21) and the third rotating column (24) are both provided with a locking assembly (211) at one end away from the stepping motor (2). The locking assembly (211) comprises a fourth mounting groove (2111). The fourth mounting groove (2111) is located at one end of the second rotating column (21) and the third rotating column (24) away from the stepping motor (2). The inner wall of the fourth mounting groove (2111) is fixedly connected with a first spring (2112). One end of the first spring (2112) is fixedly connected with a connecting column (2113). The connecting column (2113) is slidably connected to the inner wall of the fourth mounting groove (2111). The end of the connecting column (2113) away from the first spring (2112) is fixedly connected with a pulling plate (2114). One end of the pulling plate (2114) is fixedly connected with a locking column (2115). The side wall of the connecting plate (25) is evenly provided with a plurality of first slots (2116).

3. A finely adjustable lifter according to claim 1, characterized in that: The limiting assembly (29) comprises a mounting frame (291), the mounting frame (291) being fixedly connected to the side wall of the first arc-shaped plate (26), the inner wall of the mounting frame (291) being slidably connected to a second limiting plate (292), both side walls of the second limiting plate (292) being provided with two second clamping grooves (293), both side walls of the mounting frame (291) being provided with a third mounting groove (294), a pulling column (295) being arranged inside the third mounting groove (294), the side wall of the pulling column (295) being fixedly connected to a third limiting plate (296), the third limiting plate (296) being slidably connected to the inner wall of the third mounting groove (294), the side wall of the pulling column (295) being movably sleeved with a second spring (297), the two ends of the second spring (297) being fixedly connected to the third limiting plate (296) and the inner wall of the third mounting groove (294) respectively.

4. A finely adjustable lifter according to claim 1, characterized in that: The side wall of the connecting seat (12) is provided with a first mounting groove (121); the fine-tuning assembly (13) comprises a threaded column (131); the threaded column (131) penetrates the connecting seat (12); the upper end of the threaded column (131) is movably connected to the lower end of the mounting seat (15); the side wall of the threaded column (131) is threadedly connected with a third gear (132); the third gear (132) is positioned and rotatably connected inside the first mounting groove (121); the side wall of the third gear (132) is meshedly connected with a fourth gear (133); the lower end of the fourth gear (133) is fixedly connected with a first rotating column (134); the lower end of the first rotating column (134) is fixedly connected with a rotating block (135); the lower end of the rotating block (135) and the upper end of the fourth gear (133) are both movably connected to the inner wall of the first mounting groove (121) through a pin shaft.

5. A finely adjustable lifter according to claim 1, characterized in that: An oblique groove (262) is provided on the inner bottom wall of the second installation groove (261), and a clamping block (263) is fixedly connected to the inner bottom wall of the second installation groove (261).

6. A finely adjustable lifter according to claim 3, characterized in that: The inner wall of the installation frame (291) is provided with a slide groove (298), and both side walls of the second limiting plate (292) are fixedly connected with a stopper (299), and the stopper (299) is slidably connected to the inner wall of the slide groove (298).

7. A finely adjustable lifter according to claim 1, characterized in that: The upper end of the connection seat (12) is evenly provided with four through holes (122); the lower end of the mounting seat (15) is fixedly connected to a limiting column (14); the limiting column (14) is slidably connected to the inner wall of the through hole (122); the lower end of the limiting column (14) is fixedly connected to a first limiting plate (141); the lower end of the connection seat (12) is fixedly connected to a protective shell (16); and the limiting column (14) is located inside the protective shell (16).

8. A finely adjustable lifter according to claim 1, characterized in that: The side wall of the mounting seat (15) is provided with a limiting groove (151), the side wall of the connecting plate (25) is fixedly connected to a limiting ring (251), and the limiting ring (251) is slidably connected to the inner wall of the limiting groove (151).

9. A finely adjustable lifter according to claim 3, characterized in that: The lower end of the second limiting plate (292) is fixedly connected to a pulling block (3), the lower end of the mounting frame (291) is provided with a placement groove (31), and the pulling block (3) is slidably connected to the inner wall of the placement groove (31).

10. A finely adjustable lifter according to claim 2, characterized in that: The fourth mounting groove (2111) is shaped like a prism, and the connecting column (2113) is shaped like a T-shaped prism.

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