Manual adjustment type operation table

Abstract

The utility model discloses a manual adjustment type operating platform which comprises an operating platform body, a handrail control box and a manual adjustment mechanism, the manual adjustment mechanism comprises a first moving module and a second moving module, and the first moving module and the second moving module comprise a fixing frame A, a lead screw mechanism A, a guide assembly A, a sliding piece A and a driving mechanism A; the lead screw mechanism A comprises a lead screw A and a lead screw nut A. The sliding part A is slidably installed on the guide assembly A. The sliding part A and the lead screw nut A are matched to form an insertion structure so that the lead screw nut A can drive the sliding part A to move, and the lead screw nut A can rotate relative to the sliding part A. The driving mechanism A comprises a handle A, a first bevel gear connected to the handle A and a second bevel gear connected to the lead screw nut A and in transmission connection with the first bevel gear, a fixing frame A of the second moving module is vertically installed on a sliding piece A of the first moving module, and through the arrangement, manual adjustment is more convenient, and the occupied space is smaller.

Description

Technical Field

[0001] This utility model relates to the technical field of control panels, and in particular to a manually adjustable control panel. Background Technology

[0002] A control panel, also known as a control console, is a device used to control mechanical equipment such as cranes. It is usually located in the driver's cab or the main control room. The operator sits on the control panel seat and operates the entire equipment by operating the master controller and buttons on the control box on both sides of the seat.

[0003] Existing adjustment mechanisms for the position of the handrail control box include manual and electric adjustment mechanisms. Although manual adjustment mechanisms are less convenient to operate than electric adjustment mechanisms, they still have a large market share due to their lower manufacturing and maintenance costs, as well as their superior reliability and lower failure rate. Current manual adjustment mechanisms place the handle at the end of a lead screw, driving the screw nut to move, which in turn moves the sliding component. This design not only increases the overall length of the manual adjustment mechanism but also affects operational convenience due to limited space in the driver's cab or main control room. Therefore, how to achieve a compact and miniaturized manual adjustment mechanism while improving its operational convenience is a technical problem that needs to be solved. Utility Model Content

[0004] The purpose of this utility model is to provide a manually adjustable control panel. By designing the drive mechanism A, the manual adjustable control panel of this utility model places the handle A in the middle position between the first moving module and the second moving module. This not only reduces the space occupied, but also makes it easier for the operator to make adjustments in a limited space. Therefore, this manual adjustment mechanism is very suitable for occasions with limited space.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A manually adjustable operating console includes an operating console body, a handrail control box disposed on the side of the operating console body, and a manual adjustment mechanism for adjusting the position of the handrail control box. The manual adjustment mechanism includes a first moving module for driving the handrail control box to move back and forth and a second moving module for driving the handrail control box to move vertically up and down. Both the first moving module and the second moving module include a fixed frame A, a lead screw mechanism A, a guide component A, a sliding member A, and a drive mechanism A. The lead screw mechanism A includes a lead screw A fixedly installed on the fixed frame A and a lead screw nut A disposed on the lead screw A. The guide component A is arranged along the length direction of the lead screw A. The sliding member A is slidably mounted on the guide assembly A on the fixed frame A. The sliding member A and the lead screw nut A cooperate to form a plug-in structure so that the lead screw nut A can drive the sliding member A to move. The lead screw nut A can rotate relative to the sliding member A. The drive mechanism A includes a handle A rotatably mounted on the sliding member A, a first bevel gear connected to the inner end of the handle A, and a second bevel gear fixedly connected to the lead screw nut A. The first bevel gear and the second bevel gear are connected in a transmission connection. The fixed frame A of the first moving module is longitudinally arranged on the side end of the operating table body. The fixed frame A of the second moving module is vertically mounted on the sliding member A of the first moving module. The armrest control box is connected to the sliding member A of the second moving module.

[0006] Furthermore, the manual adjustment mechanism also includes a third moving module for driving the handrail control box to move left and right. The third moving module is disposed on the slider A of the second moving module, and the handrail control box is connected to the slider A of the second moving module through the third moving module.

[0007] Furthermore, the third moving module includes a fixed frame B horizontally arranged on the sliding member A of the second moving module, a lead screw mechanism B arranged on the fixed frame B, a guide component B arranged on the fixed frame B, and a handle B for driving the lead screw mechanism B. The lead screw mechanism B includes a lead screw B and a lead screw nut B arranged on the lead screw B. A sliding member B is connected to the lead screw nut B. The sliding member B is slidably connected to the guide component B. The handrail control box is connected to the sliding member B.

[0008] Furthermore, the handles A of the first and second moving modules and the handle B of the third moving module under the same handrail control box are located on the same side of the handrail control box.

[0009] Furthermore, the mounting bracket A of the first mobile module is fixedly connected to the side end of the operating table body and is arranged longitudinally.

[0010] Furthermore, the slider A of the first moving module includes a first sliding plate and a first protective plate bent at both ends of the first sliding plate, so that the slider A of the first moving module cooperates with the fixing frame A of the first moving module to form a protective cover.

[0011] Furthermore, the sliding member A of the first moving module is connected to telescopic covers at both ends, and the other end of the telescopic cover relative to the sliding member A is connected to the fixing frame A of the first moving module.

[0012] Furthermore, the sliding component A of the second moving module includes at least a second sliding plate, a second protective plate bent at both ends of the second sliding plate, and a mounting plate connected to the upper end of the second sliding plate and the second protective plate. The second sliding plate, the second protective plate, the mounting plate, and the fixing frame A of the second transfer module cooperate to form a protective cover. The third moving module is fixedly mounted on the upper end of the mounting plate.

[0013] Furthermore, a telescopic cover is provided at the bottom of the slider A of the second moving module, and the telescopic cover is connected to the fixing frame A of the second moving module at the other end relative to the slider A.

[0014] Furthermore, the slider B includes a third sliding plate, a third protective plate bent at both ends of the third sliding plate, and a connecting plate connected to the side ends of the third sliding plate and the third protective plate. The connecting plate is located on the other side of the handle B.

[0015] Furthermore, the plug-in structure includes a convex ring sleeve connected to the lead screw nut A and an insert plate disposed on the sliding member A. The convex ring sleeve has two convex rings spaced apart and an annular slot formed between the two convex rings. The insert plate is inserted into the slot. The lead screw nut A and the convex ring sleeve can rotate relative to the insert plate. When the lead screw nut A moves along the length direction of the lead screw A, the lead screw nut A drives the sliding member A to move through the convex ring sleeve.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. The manual adjustment control panel of this utility model, through the design of the drive mechanism A, places the handle A in the middle position between the first moving module and the second moving module, which not only reduces the space occupied, but also makes it easier for the operator to perform adjustment operations in a limited space. Therefore, this manual adjustment mechanism is very suitable for occasions with limited space.

[0018] 2. The manually adjustable control panel of this utility model places the handles A of the first and second moving modules and the handle B of the third moving module under the same handrail control box on the same side of the handrail control box, which makes it easier for the operator to adjust the position of the handrail control box at the same position, making the adjustment more convenient.

[0019] 3. The manually adjustable control panel of this utility model has good self-locking performance through the gear transmission cooperation of the lead screw mechanism A and the drive mechanism A. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a front view of the overall structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the manual adjustment mechanism and handrail control box of this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of the first mobile module of this utility model.

[0024] Figure 5 This is a cross-sectional view of the first mobile module of this utility model.

[0025] Figure 6 This is the utility model Figure 5 Enlarged view of point A.

[0026] Figure 7 This is a schematic diagram of the installation structure of the drive mechanism A of this utility model.

[0027] Figure 8 This is an exploded view of the second moving module of this utility model from a first perspective.

[0028] Figure 9 This is an exploded view of the second moving module of this utility model from a second perspective.

[0029] Figure 10 This is a schematic diagram of the installation structure of the lead screw B of the third moving module of this utility model.

[0030] Figure 11 This is a schematic diagram of the slider B of the third moving module of this utility model.

[0031] Figure 12 This is a cross-sectional view of the third moving module of this utility model.

[0032] In the diagram: 10. Control panel body; 20. Handrail control box; 30. Manual adjustment mechanism; 31. First moving module; 311. Fixed frame A; 312. Lead screw mechanism A; 3121. Lead screw A; 3122. Lead screw nut A; 3123. Convex ring sleeve; 3124. Slot; 313. Guide assembly A; 314. Sliding member A; 3141. First sliding plate; 3142. First protective plate; 3143. Second sliding plate; 3144. Second protective plate; 3145. Mounting plate; 3146. Insert plate 315. Drive mechanism A; 3151. Handle A; 3152. First bevel gear; 3153. Second bevel gear; 3154. Handle shaft; 316. Telescopic cover; 32. Second moving module; 33. Third moving module; 331. Fixing frame B; 332. Lead screw mechanism B; 3321. Lead screw B; 3322. Lead screw nut B; 333. Guide assembly B; 334. Handle B; 335. Sliding component B; 3351. Third sliding plate; 3352. Third protective plate; 3353. Connecting plate. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] like Figures 1-12 As shown, a manually adjustable control panel includes a control panel body 10, a handrail control box 20 disposed on the side of the control panel body 10, and a manual adjustment mechanism 30 for adjusting the position of the handrail control box 20. The above constitutes the basic structure of this utility model. At least one side of the left and right sides of the control panel body 10 is provided with a handrail control box 20, and the side of the control panel body 10 is equipped with a manual adjustment mechanism 30 for adjusting the position of the handrail control box 20. Preferably, both the left and right sides of the control panel body 10 are provided with a handrail control box 20 and a manual adjustment mechanism 30 for adjusting the position of the handrail control box 20.

[0035] The manual adjustment mechanism 30 includes a first moving module 31 for driving the handrail control box 20 to move back and forth and a second moving module 32 for driving the handrail control box 20 to move vertically up and down. Both the first moving module 31 and the second moving module 32 include a fixed frame A311, a lead screw mechanism A312, a guide assembly A313, a sliding member A314, and a drive mechanism A315. The lead screw mechanism A312 includes a lead rod A3121 fixedly mounted on the fixed frame A311 and a lead rod nut A3122 disposed on the lead rod A3121. Specifically, the operation mode of the lead screw mechanism A312 in this invention is that the lead rod A3121 is fixed. For details, please refer to the appendix to the instruction manual. Figure 5The end of the lead screw A3121 is locked by a fastener or pin. The lead screw nut A3122 rotates and can move axially along the lead screw A3121. The guide assembly A313 is arranged on the fixed frame A311 along the length of the lead screw A3121. Preferably, the guide assembly A313 includes guide rails symmetrically arranged on both sides of the lead screw A3121. The sliding member A314 is slidably mounted on the guide assembly A313. The sliding member A314 and the lead screw nut A3122 cooperate to form a plug-in structure. The lead screw nut A3122 enables the sliding member A314 to reciprocate. The lead screw nut A3122 can rotate relative to the sliding member A314 about its own axis. The drive mechanism A315 includes a handle A3151 rotatably mounted on the sliding member A314, a first bevel gear 3152 connected to the inner end of the handle A3151, and a second bevel gear 3153 fixedly connected to the lead screw nut A3122. The first bevel gear 3152 and the second bevel gear 3153 are connected in a transmission connection. The fixing frame A311 of the first moving module 31 is longitudinally arranged on the side of the operating table body 10. The fixing frame A311 of the second moving module 32 is vertically mounted on the sliding member A314 of the first moving module 31. The armrest control box 20 is connected to the sliding member A314 of the second moving module 32. Specifically, the handle A3151 of the drive mechanism A315 is rotatably connected to the slider A314 via the handle shaft 3154, and the first bevel gear 3152 is fixedly disposed at the other end of the handle shaft 3154 relative to the handle A3151.

[0036] The manually adjustable control panel of this utility model, through the design of the drive mechanism A315, positions the handle A3151 in the middle of the first moving module 31 and the second moving module 32. Here, the middle position does not specifically refer to the center of the first moving module 31 and the second moving module 32, but rather refers to the middle area between the two ends of the first moving module 31 and the middle area between the two ends of the second moving module 32. With this setting, it occupies less space and makes it easier for the operator to perform adjustment operations in a limited space. Therefore, this manually adjustable mechanism 30 is very suitable for occasions with limited space.

[0037] In some embodiments, the manual adjustment mechanism 30 further includes a third moving module 33 for driving the handrail control box 20 to move left and right. The third moving module 33 is disposed on the slider A314 of the second moving module 32, and the handrail control box 20 is connected to the slider A314 of the second moving module 32 through the third moving module 33. Specifically, the third moving module 33 includes a fixed frame B331 horizontally arranged on the sliding member A314 of the second moving module 32, a lead screw mechanism B332 arranged on the fixed frame B331, a guide component B333 arranged on the fixed frame B331, and a handle B334 for driving the lead screw mechanism B332. The lead screw mechanism B332 includes a lead rod B3321 rotatably mounted on the fixed frame B331 and a lead rod nut B3322 arranged on the lead rod B3321. A sliding member B335 is connected to the lead rod nut B3322. The sliding member B335 is slidably connected to the guide component B333. The handrail control box 20 is connected to the sliding member B335. Preferably, the handrail control box 20 is fixedly connected to the upper end of the sliding member B335. When the handle B334 is turned, the lead screw B3321 rotates and drives the lead screw nut B3322 to move along the length of the lead screw B3321, thereby driving the sliding member B335 and the handrail control box 20 connected to the sliding member B335 to move left and right, thereby adjusting the left and right position of the handrail control box 20.

[0038] Because the lead screw mechanisms A312 and B332 have a certain self-locking function, the handrail control box 20 can be maintained in the adjusted position after the first moving module 31, the second moving module 32 and the third moving module 33 have adjusted the position of the handrail control box 20. In addition, the first moving module 31 and the second moving module 32 can further improve the self-locking performance by cooperating with the lead screw mechanism A312 through bevel gear transmission. Specifically, the tangential force of the first bevel gear 3152 and the second bevel gear 3153 during meshing transmission is perpendicular or nearly perpendicular to the moving direction of the lead screw nut A3122. Therefore, the sliding member A314 can achieve effective self-locking after the moving position is adjusted, thereby effectively maintaining the position of the handrail control box 20.

[0039] In some embodiments, the handles A3151 of the first moving module 31 and the second moving module 32 under the same handrail control box 20 and the handle B334 of the third moving module 33 are located on the same side of the handrail control box 20, which makes it easier for the operator to adjust the position of the handrail control box 20 in the same position, making the adjustment more convenient. On the other hand, it can also better adapt to occasions with limited space, so that the operator can adjust the position of the handrail control box 20 in occasions with limited space.

[0040] In some embodiments, the fixing frame A311 of the first moving module 31 is fixedly connected to the side end of the operating table body 10 and is arranged longitudinally. Specifically, the fixing frame A311 of the first moving module 31 is fixed at the bottom side end of the operating table body 10. The lead screw mechanism A312 of the first moving module 31 is arranged along the length direction of the fixing frame A311. The guide component A313 of the first moving module 31 includes guide rails symmetrically arranged on both sides of the lead screw A3121. The slider A314 of the first moving module 31 is slidably mounted on the guide rail. Preferably, the slider A314 is slidably connected to the guide rail by a slider. In this utility model, the slider A314 of the first moving module 31 is fixedly connected to the fixing frame A311 of the second moving module 32. The slider is fixedly connected to the slider A314 of the first moving module 31 or the fixing frame A311 of the second moving module 32.

[0041] Specifically, the guide component A313 can be a linear slide rail or a linearly arranged guide rail, preferably a linearly arranged guide rail. The guide rail includes a connecting part and a guiding part. The guiding part is connected to the fixed frame A311 through the connecting part. The cross-sectional width of the end of the connecting part near the guiding part is smaller than the cross-sectional width of the guiding part, so that the slider can play a limiting role when it cooperates with the guide rail, preventing the slider from falling off the guide rail.

[0042] The fixing frame A311 of the second moving module 32 is vertically arranged and connected to the sliding member A314 of the first moving module 31. The guide component A313 of the second moving module 32 includes guide rails symmetrically arranged on both sides of the lead screw A3121. The application of setting the first moving module 31 at the lower end of the second moving module 32 can effectively ensure the stability of the handrail control box 20 and prevent it from tilting due to its center of gravity being too high.

[0043] In some embodiments, the slider A314 of the first moving module 31 includes a first sliding plate 3141 and a first protective plate 3142 bent at both ends of the first sliding plate 3141, so that the slider A314 of the first moving module 31 cooperates with the fixing frame A311 of the first moving module 31 to form a protective cover, which can protect the lead screw mechanism A312, the first bevel gear 3152 and the second bevel gear 3153.

[0044] In some embodiments, the sliding member A314 of the first moving module 31 is connected to telescopic covers 316 at both ends. The other end of the telescopic cover 316 relative to the sliding member A314 is connected to the fixing frame A311 of the first moving module 31. The telescopic cover 316 and the protective cover cooperate to form a dustproof cavity, so as to accommodate the lead screw mechanism A312, the first bevel gear 3152 and the second bevel gear 3153 of the first moving module 31 in the dustproof cavity, which can effectively prevent dust and other impurities from entering.

[0045] In some embodiments, the sliding member A314 of the second moving module 32 includes at least a second sliding plate 3143, a second protective plate 3144 bent at both ends of the second sliding plate 3143, and a mounting plate 3145 connected to the upper ends of the second sliding plate 3143 and the second protective plate 3144. The second sliding plate 3143, the second protective plate 3144, the mounting plate 3145 and the fixing frame A311 of the second transfer module cooperate to form a protective cover. The third moving module 33 is fixedly mounted on the upper end of the mounting plate 3145. The mounting plate 3145 is used to connect and support the third moving module 33.

[0046] In some embodiments, a telescopic cover 316 is provided at the bottom of the slider A314 of the second moving module 32. The other end of the telescopic cover 316 relative to the slider A314 is connected to the fixing frame A311 of the second moving module 32. The protective cover of the second moving module 32 and the telescopic cover 316 cooperate to form a dustproof cavity, so as to accommodate the lead screw mechanism A312, the first bevel gear 3152 and the second bevel gear 3153 of the second moving module 32 in the dustproof cavity, which can effectively prevent dust and other impurities from entering.

[0047] In some embodiments, the slider B335 includes a third slide plate 3351, a third protective plate 3352 bent at both ends of the third slide plate 3351, and a connecting plate 3353 connected to the side ends of the third slide plate 3351 and the third protective plate 3352. The connecting plate 3353 is disposed on the other side of the handle B334. The slider B335 covers the upper end of the fixed frame B331 and can be used to protect the lead screw mechanism B332, and can also play a certain role in dust prevention.

[0048] In some embodiments, the plug-in structure includes a convex ring sleeve 3123 connected to the lead screw nut A3122 and an insert plate 3146 disposed on the slider A314. The convex ring sleeve 3123 has two convex rings spaced apart and an annular slot 3124 formed between the two convex rings. The insert plate 3146 is inserted into the slot 3124. The lead screw nut A3122 and the convex ring sleeve 3123 are rotatable relative to the insert plate 3146. When the lead screw nut A3122 moves along the length direction of the lead screw A3121, the lead screw nut A3122 drives the slider A314 to move through the convex ring sleeve 3123. Preferably, the thickness of the insert plate 3146 is adapted to the slot 3124 or slightly smaller than the width of the slot 3124, so that when the lead screw nut A3122 moves along the lead screw A3121, the convex rings will push the insert plate 3146 to move.

[0049] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A manually adjustable control panel, characterized in that: The system includes a control panel body (10), a handrail control box (20) located on the side of the control panel body (10), and a manual adjustment mechanism (30) for adjusting the position of the handrail control box (20). The manual adjustment mechanism (30) includes a first moving module (31) for driving the handrail control box (20) to move back and forth and a second moving module (32) for driving the handrail control box (20) to move vertically up and down. Both the first moving module (31) and the second moving module (32) include a fixed frame A (311). The system comprises a lead screw mechanism A (312), a guide assembly A (313), a slider A (314), and a drive mechanism A (315). The lead screw mechanism A (312) includes a lead screw A (3121) fixedly mounted on a fixed frame A (311) and a lead screw nut A (3122) disposed on the lead screw A (3121). The guide assembly A (313) is disposed on the fixed frame A (311) along the length direction of the lead screw A (3121). The slider A (314) is slidably mounted on the guide assembly A (315). On 313), the sliding member A (314) and the lead screw nut A (3122) cooperate to form a plug-in structure so that the lead screw nut A (3122) can drive the sliding member A (314) to move. The lead screw nut A (3122) can rotate relative to the sliding member A (314). The driving mechanism A (315) includes a handle A (3151) rotatably mounted on the sliding member A (314), a first bevel gear (3152) connected to the inner end of the handle A (3151), and a drive mechanism A (315) fixedly connected to the lead screw nut A (314). The second bevel gear (3153) of the rod nut A (3122) is connected to the first bevel gear (3152) and the second bevel gear (3153) in a transmission connection. The fixing frame A (311) of the first moving module (31) is longitudinally arranged on the side of the operating table body (10). The fixing frame A (311) of the second moving module (32) is vertically installed on the sliding member A (314) of the first moving module (31). The handrail control box (20) is connected to the sliding member A (314) of the second moving module (32).

2. The manually adjustable control panel according to claim 1, characterized in that: The manual adjustment mechanism (30) further includes a third moving module (33) for driving the handrail control box (20) to move left and right. The third moving module (33) is disposed on the sliding member A (314) of the second moving module (32). The handrail control box (20) is connected to the sliding member A (314) of the second moving module (32) through the third moving module (33).

3. The manually adjustable control panel according to claim 2, characterized in that: The third moving module (33) includes a fixed frame B (331) horizontally arranged on a sliding member A (314) of the second moving module (32), a screw mechanism B (332) arranged on the fixed frame B (331), a guide component B (333) arranged on the fixed frame B (331), and a handle B (334) for driving the screw mechanism B (332) to run. The screw mechanism B (332) includes a screw B (3321) and a screw nut B (3322) arranged on the screw B (3321). A sliding member B (335) is connected to the screw nut B (3322). The sliding member B (335) is slidably connected to the guide component B (333). The handrail control box (20) is connected to the sliding member B (335).

4. A manually adjustable control panel according to claim 3, characterized in that: The handles A (3151) of the first moving module (31) and the second moving module (32) under the same handrail control box (20) and the handle B (334) of the third moving module (33) are located on the same side of the handrail control box (20).

5. A manually adjustable control panel according to claim 1, characterized in that: The slider A (314) of the first moving module (31) includes a first sliding plate (3141) and a first protective plate (3142) bent at both ends of the first sliding plate (3141) so that the slider A (314) of the first moving module (31) cooperates with the fixing frame A (311) of the first moving module (31) to form a protective cover.

6. A manually adjustable control panel according to claim 5, characterized in that: The first moving module (31) has a telescopic cover (316) connected to both ends of the sliding member A (314). The other end of the telescopic cover (316) relative to the sliding member A (314) is connected to the fixing frame A (311) of the first moving module (31).

7. A manually adjustable control panel according to claim 2, characterized in that: The sliding member A (314) of the second moving module (32) includes at least a second sliding plate (3143), a second protective plate (3144) bent at both ends of the second sliding plate (3143), and a mounting plate (3145) connected to the upper ends of the second sliding plate (3143) and the second protective plate (3144). The second sliding plate (3143), the second protective plate (3144), the mounting plate (3145) cooperate with the fixing frame A (311) of the second transfer module to form a protective cover. The third moving module (33) is fixedly installed on the upper end of the mounting plate (3145).

8. A manually adjustable control panel according to claim 7, characterized in that: The bottom of the slider A (314) of the second moving module (32) is provided with a telescopic cover (316), and the other end of the telescopic cover (316) relative to the slider A (314) is connected to the fixing frame A (311) of the second moving module (32).

9. A manually adjustable control panel according to claim 3, characterized in that: The slider B (335) includes a third slide plate (3351), a third protective plate (3352) bent at both ends of the third slide plate (3351), and a connecting plate (3353) connected to the side ends of the third slide plate (3351) and the third protective plate (3352). The connecting plate (3353) is located on the other side of the handle B (334).

10. A manually adjustable control panel according to any one of claims 1-9, characterized in that: The plug-in structure includes a convex ring sleeve (3123) connected to the lead screw nut A (3122) and an insert plate (3146) disposed on the sliding member A (314). The convex ring sleeve (3123) has two convex rings spaced apart and an annular slot (3124) formed between the two convex rings. The insert plate (3146) is inserted into the slot (3124). The lead screw nut A (3122) and the convex ring sleeve (3123) can rotate relative to the insert plate (3146). When the lead screw nut A (3122) moves along the length direction of the lead screw A (3121), the lead screw nut A (3122) drives the sliding member A (314) to move through the convex ring sleeve (3123).

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