Magnetic force attaching mechanism

Abstract

The application relates to the technical field of LCD and polarizing plate pasting, in particular to a magnetic force pasting mechanism. The magnetic force pasting mechanism comprises an LCD height adjusting mechanism, the bottom of one side of the LCD height adjusting mechanism is provided with a longitudinal translation mechanism, the inner side of the bottom end of the longitudinal translation mechanism is provided with an electromagnet, the bottom of the longitudinal translation mechanism is provided with an LCD suction plate, the bottom of the LCD suction plate is provided with a steel belt, the bottom of the steel belt is provided with a corner lifting mechanism, the longitudinal translation mechanism comprises a connecting plate, a displacement driving motor, a screw rod, a threaded sliding block and a bottom plate, the top of the connecting plate is bolted with the height adjusting motor, the inner side of the bottom end of the connecting plate is rotationally connected with the screw rod, and one end of the top of the connecting plate is fixed with the displacement driving motor. The magnetic force pasting mechanism provided by the application is pasted through the pasting mode of the steel belt + magnetic force, so that the deformation after pasting is greatly reduced, the pressure is provided for the surface contact through the electromagnetic adsorption, and the deformation of the LCD caused by the wire drawing of the polarizing plate is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of LCD and polarizer bonding technology, and more particularly to a magnetic bonding mechanism. Background Technology

[0002] A polarizer is an optical thin film composed of multiple layers of polymer materials that generates polarized light. It converts unpolarized natural light into polarized light, allowing light perpendicular to the electric field to pass through. This enables the LCD panel to display images correctly, making it an essential component for liquid crystal displays (LCDs). In the later stages of LCD manufacturing, the polarizer needs to be attached to the LCD panel, which already has a flexible circuit board attached. The attachment methods between the LCD and the polarizer include sheet-to-platform, roller-to-platform, and stencil-to-platform attachments, all of which require pressure from the roller.

[0003] The best way to attach an LCD to a polarizing plate is by using a sheet attachment method. This method uses PET and an adhesive plate to pick up the polarizing plate, and then uses a roller to roll and attach the polarizing plate. The only drawback of this method is that PET is a flexible material, and the attachment material has a certain degree of elastic deformation, which causes the attached film to be subjected to tension and deformed, which in turn causes the attached LCD product to deform.

[0004] To address this issue, a magnetic attachment mechanism is designed to provide an alternative technical solution. Summary of the Invention

[0005] Therefore, it is necessary to provide a magnetic attachment mechanism to address the aforementioned technical problems, thereby resolving the technical issues raised in the background section.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A magnetic attachment mechanism includes an LCD height adjustment mechanism. A longitudinal translation mechanism is located at the bottom of one side of the LCD height adjustment mechanism. An electromagnet is located on the inner side of the bottom end of the longitudinal translation mechanism. An LCD suction plate is located at the bottom of the longitudinal translation mechanism. A steel strip is located at the bottom of the LCD suction plate. A lifting mechanism is located at the bottom of the steel strip. The longitudinal translation mechanism includes a connecting plate, a displacement drive motor, a lead screw, a threaded slider, and a base plate. The top of the connecting plate is bolted to the height adjustment motor. A lead screw is rotatably connected to the inner side of the bottom end of the connecting plate. A displacement drive motor is fixed to one end of the top of the connecting plate. The output end of the displacement drive motor is connected to the outer side of one end of the lead screw via a synchronous belt. A threaded slider is threadedly connected to the outer side of the lead screw. The bottom of the threaded slider is fixed to the electromagnet. A base plate is fixed to the bottom end of the connecting plate, located below the electromagnet. The bottom of the base plate is bolted to the LCD suction plate.

[0008] In a preferred embodiment of the magnetic attachment mechanism provided by the present invention, the LCD height adjustment mechanism includes a support frame, a first guide rail, a first slider, a first connecting frame, a height adjustment motor, and a second connecting frame. The first guide rail is fixed at both ends on one side of the support frame, and the first slider is slidably connected to the outer side of one side of the first guide rail. The first connecting frame is fixed to one side of the two first sliders. The height adjustment motor is fixed to one side of the top of the support frame, and the push rod of the height adjustment motor is fixed to the first connecting frame. The second connecting frame is fixed to the bottom of the first connecting frame on the side away from the support frame.

[0009] In a preferred embodiment of the magnetic attachment mechanism provided by the present invention, a first detection plate is bolted to one end of the first connecting frame near the support frame, and a first limit switch is uniformly fixed to one side of the support frame.

[0010] In a preferred embodiment of the magnetic attachment mechanism provided by the present invention, a second guide rail is fixed on the inner side of the bottom end of the connecting plate and on both sides of the threaded slider. A second slider is slidably connected to the outer side of the bottom end of the second guide rail, and the bottom of the second slider is fixed to the electromagnet.

[0011] In a preferred embodiment of the magnetic attachment mechanism provided by the present invention, the lifting mechanism includes a fixed frame, a fourth guide rail, a fourth slider, a support plate, a first positioning frame, a second positioning frame, a first limiting block, a second limiting block, a lifting angle adjustment motor, a lifting block, and an adjusting threaded column. The first positioning frame is bolted to one end of the top of the support plate, and the fourth guide rail is fixed to both sides of the other end of the top of the support plate. A fourth slider is slidably connected to the outer side of the top of the fourth guide rail. A fixed frame is fixed to the top of the two fourth sliders, and the top of the fixed frame away from the first positioning frame is provided with... The device includes a second positioning frame, with the outer sides of the tops of the first and second positioning frames, which are far apart from each other, bolted to a steel strip. A first limiting block is fixed to both sides of the fixed frame near the first positioning frame. A second limiting block is fixed to both sides of one end of the support plate, at the end of the first limiting block far from the first positioning frame. A lifting block is slidably connected to the top of the fixed frame, and the lifting block is bolted to the second positioning frame. A lifting angle adjustment motor is fixed to the bottom of the fixed frame, and an adjusting threaded column is connected to the output end of the lifting angle adjustment motor. The outer side of the adjusting threaded column is threadedly connected to the lifting block.

[0012] In a preferred embodiment of the magnetic attachment mechanism provided by the present invention, the fixed frame is fixed with third guide rails on both sides near the end of the second positioning frame, and the second positioning frame is fixed with third sliders on both sides near the end of the fixed frame, and the third sliders are slidably connected to the third guide rails.

[0013] In a preferred embodiment of the magnetic attachment mechanism provided by the present invention, a second detection plate is bolted to one side of the lifting block, and a second limit switch is fixed to the inner side of the fixing frame and at the top and bottom of one side of the lifting block.

[0014] In a preferred embodiment of the magnetic attachment mechanism provided by the present invention, tensioning mechanisms are installed on both sides of the bottom of the fixed frame away from the support plate. The tensioning mechanism includes a push rod motor and a synchronizing block. The push rod motor is fixed on both sides of the bottom of the fixed frame away from the support plate. The push rod of the push rod motor passes through the fixed frame and is connected to the synchronizing block. The bottom of the synchronizing block is fixed to the support plate.

[0015] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0016] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0017] The present invention provides a magnetic bonding mechanism that uses a steel strip and magnetic bonding method to bond the material, thereby greatly reducing the amount of deformation after bonding. At the same time, electromagnetic adsorption provides pressure for surface contact. The use of a metal steel strip has a smaller elastic deformation than PET, which greatly reduces the deformation of the LCD caused by polarizer fraying. It also reduces the generation of foreign objects and wear of the rubber roller due to friction during the bonding process.

[0018] By coordinating the lifting mechanism and the tensioning mechanism, the position of the steel strip can be adjusted by a single angle through the height of the lifting mechanism. At the same time, the tensioning mechanism can adjust the tension of the steel strip between the first positioning frame and the second positioning frame. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a side view of the present invention;

[0022] Figure 3 This is a schematic diagram of the connecting plate of the present invention;

[0023] Figure 4 This is a schematic diagram of the lead screw structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the steel strip structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the support plate of the present invention;

[0026] Figure 7 This is a schematic diagram of the lifting block of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the second detection plate of the present invention.

[0028] In the diagram: 1. LCD height adjustment mechanism; 2. Longitudinal translation mechanism; 3. Electromagnet; 4. LCD suction plate; 5. Steel strip; 6. Lifting angle mechanism; 7. Tensioning mechanism; 8. First guide rail; 9. First slider; 10. First limit switch; 11. First detection plate; 12. First connecting frame; 13. Height adjustment motor; 14. Connecting plate; 15. Displacement drive motor; 16. Lead screw; 17. Threaded slider; 18. Second guide rail; 19. Second slider; 20. Base plate; 21. Second connecting frame; 22. Support plate; 23. First positioning frame; 24. Second positioning frame; 25. Push rod motor; 26. Synchronizing block; 27. First limit block; 28. Second limit block; 29. ​​Lifting angle adjustment motor; 30. Third guide rail; 31. Third slider; 32. Lifting block; 33. Second detection plate; 34. Second limit switch; 35. Adjusting threaded column. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0031] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] Reference Figures 1-8A magnetic attachment mechanism includes an LCD height adjustment mechanism 1, a longitudinal translation mechanism 2 at the bottom of one side of the LCD height adjustment mechanism 1, an electromagnet 3 at the inner side of the bottom end of the longitudinal translation mechanism 2, and an LCD suction plate 4 at the bottom of the longitudinal translation mechanism 2, thereby attracting a steel strip 5 through the operation of the LCD suction plate 4; a steel strip 5 is provided at the bottom of the LCD suction plate 4, and a lifting angle mechanism 6 is provided at the bottom of the steel strip 5, thereby adjusting the steel strip 5 at a single angle through the operation of the lifting angle mechanism 6;

[0034] In this embodiment, the steel strip 5 is a SUS440C steel strip. The SUS440C steel strip is made of 440C or martensitic stainless steel, can be magnetically attracted, has a thickness of 0.27mm-0.10mm, has a certain amount of deformation and is rust-proof. A layer of double-sided adhesive transfer paper is attached to the steel strip for sticking the polarizing plate.

[0035] In other embodiments, the LCD suction plate 4 is a vacuum suction plate, and the gas extraction end of the LCD suction plate 4 is connected to an external air pump or other structure, so that when the bottom of the LCD suction plate 4 comes into contact with an object, the object can be moved by vacuum suction.

[0036] The LCD height adjustment mechanism 1 includes a support frame, a first guide rail 8, a first slider 9, a first limit switch 10, a first detection plate 11, a first connecting frame 12, a height adjustment motor 13, and a second connecting frame 21. The first guide rail 8 is fixed at both ends on one side of the support frame, so that it can be fixed to the external structure by bolts at the bottom of the support frame, thereby enabling the LCD height adjustment mechanism 1 to achieve height support. The first slider 9 is slidably connected to the outer side of one side of the first guide rail 8, so that the first slider 9 can slide up and down on the outer side of the first guide rail 8, and the first guide rail 8 and the first slider 9 cannot be separated by translation.

[0037] A first connecting frame 12 is fixed to one side of each of the two first sliders 9. A height adjustment motor 13 is fixed to one side of the top of the support frame. The push rod of the height adjustment motor 13 is fixed to the first connecting frame 12, so that the operation of the height adjustment motor 13 drives the first connecting frame 12 to slide and lift through the first guide rail 8 and the first sliders 9. A first detection plate 11 is bolted to one end of the first connecting frame 12 near the support frame. A first limit switch 10 is evenly fixed to one side of the support frame, so that the lifting and lowering of the first connecting frame 12 drives the first detection plate 11 to lift and lower inside the first limit switch 10. The height of the first detection plate 11 is detected by the operation of the first limit switch 10 to limit the lifting and lowering stroke of the first connecting frame 12. A second connecting frame 21 is fixed to the bottom of the first connecting frame 12 away from the support frame, so that the lifting and lowering adjustment of the first connecting frame 12 synchronously drives the adjustment of the second connecting frame 21.

[0038] The longitudinal translation mechanism 2 includes a connecting plate 14, a displacement drive motor 15, a lead screw 16, a threaded slider 17, a second guide rail 18, a second slider 19, and a base plate 20. The top of the connecting plate 14 is bolted to the height adjustment motor 13. The lead screw 16 is rotatably connected to the inner side of the bottom end of the connecting plate 14. The displacement drive motor 15 is fixed to one end of the top of the connecting plate 14. The output end of the displacement drive motor 15 is connected to the outer side of one end of the lead screw 16 through a synchronous belt, so that the operation of the displacement drive motor 15 drives the lead screw 16 to rotate through the synchronous belt. The outer side of the lead screw 16 is threadedly connected to the threaded slider 17. The bottom of the threaded slider 17 is fixed to the electromagnet 3, so that the rotation of the lead screw 16 drives the threaded slider 17 to move, and the threaded slider 17 drives the electromagnet 3 to translate on the inner side of the bottom end of the connecting plate 14. The operation of the electromagnet 3 attracts the steel strip 5, causing it to deform and thus generate pressure. The pressure can be changed by adjusting the current.

[0039] A second guide rail 18 is fixed on the inner side of the bottom end of the connecting plate 14 and on both sides of the threaded slider 17. A second slider 19 is slidably connected to the outer side of the bottom end of the second guide rail 18. The bottom of the second slider 19 is fixed to the electromagnet 3, so that the translation of the electromagnet 3 is guided by the sliding of the second guide rail 18 and the second slider 19, which makes it more stable. A base plate 20 is fixed at the bottom end of the connecting plate 14 and at the bottom of the electromagnet 3. The bottom of the base plate 20 is bolted to the LCD suction plate 4. The LCD suction plate 4 is made of non-metallic material. The preferred material for the LCD suction plate 4 is ceramic, followed by acetal and Teflon, so as to prevent the LCD suction plate 4 from affecting the conduction of magnetism.

[0040] The lifting mechanism 6 includes a fixed frame, a fourth guide rail, a fourth slider, a support plate 22, a first positioning frame 23, a second positioning frame 24, a first limit block 27, a second limit block 28, a lifting angle adjustment motor 29, a third guide rail 30, a third slider 31, a lifting block 32, a second detection plate 33, a second limit switch 34, and an adjusting threaded column 35. The first positioning frame 23 is bolted to one end of the top of the support plate 22, and the fourth guide rail is fixed to both sides of the other end of the top of the support plate 22. The fourth slider is slidably connected to the outer side of the top of the fourth guide rail. The top of the two fourth sliders is fixed to the fixed frame, so that the fixed frame can slide horizontally through the cooperation of the fourth guide rail and the fourth slider. The second positioning frame 24 is set on the top of the fixed frame away from the first positioning frame 23, and the outer side of the top of the first positioning frame 23 and the second positioning frame 24 is bolted to the steel strip 5, so that the height position of the steel strip 5 is supported and fixed by the first positioning frame 23 and the second positioning frame 24.

[0041] A third guide rail 30 is fixed on both sides of the fixed frame near the second positioning frame 24. A third slider 31 is fixed on both sides of the second positioning frame 24 near the fixed frame. The third slider 31 is slidably connected to the third guide rail 30, so that the second positioning frame 24 can be stably raised and lowered by sliding the third guide rail 30 and the third slider 31. A first limiting block 27 is fixed on both sides of the fixed frame near the first positioning frame 23. A second limiting block 28 is fixed on both sides of the support plate 22 at the end away from the first limiting block 27 and the first limiting block 27. The distance between the first limiting block 27 and the second limiting block 28 limits the sliding stroke of the fixed frame on the top of the support plate 22. A lifting block 32 is slidably connected to the top of the fixed frame. The lifting block 32 is bolted to the second positioning frame 24, so that the lifting of the lifting block 32 drives the second positioning frame 24 to rise and fall. The height stroke of the lifting block 32 inside the fixed frame limits the lifting stroke of the second positioning frame 24.

[0042] A second detection plate 33 is bolted to one side of the lifting block 32. A second limit switch 34 is fixed to the top and bottom of one side of the lifting block 32 on the inner side of the fixing frame, so that the lifting block 32 can be limited by the sliding of the second detection plate 33 inside the second limit switch 34. A lifting angle adjustment motor 29 is fixed to the bottom of the fixing frame. The output end of the lifting angle adjustment motor 29 is connected to an adjustment threaded column 35. The outer side of the adjustment threaded column 35 is threadedly connected to the lifting block 32, so that the rotation of the adjustment threaded column 35 drives the lifting block 32 to slide up and down inside the fixing frame.

[0043] Tensioning mechanisms 7 are installed on both sides of the bottom of the fixed frame away from the support plate 22. The tensioning mechanisms 7 adjust the distance between the fixed frame and the first positioning frame 23, and then adjust the distance between the second positioning frame 24 and the first positioning frame 23 to tension the steel strip 5. The tensioning mechanism 7 includes a push rod motor 25 and a synchronizing block 26. The push rod of the push rod motor 25 passes through the fixed frame and connects to the synchronizing block 26. The bottom of the synchronizing block 26 is fixed to the support plate 22. The operation of the push rod motor 25 drives the synchronizing block 26 to move horizontally. The synchronizing block 26 is fixed to the support plate 22, and the push rod motor 25 controls the fixed frame to move away from the first positioning frame 23 through the fixation of the synchronizing block 26 to the support plate 22. The synchronizing block 26 is stable and slides smoothly through the cooperation of the fourth guide rail and the fourth slider.

[0044] In other embodiments, the push rod motor 25 is controlled by an electro-proportional valve to adjust the tension of the steel strip 5.

[0045] The magnetic attachment mechanism provided by this invention is used as follows: When in use, the LCD panel is first attracted by the LCD suction plate 4. The first connecting frame 12 is raised and lowered by the operation of the height adjustment motor 13. The raising and lowering of the first connecting frame 12 is guided by the sliding of the first guide rail 8 and the first slider 9. At the same time, the raising and lowering of the first connecting frame 12 is limited by the sliding of the first detection plate 11 inside different first limit switches 10. The first connecting frame 12 drives the second connecting frame 21 to rise and fall synchronously. The raising and lowering of the second connecting frame 21 drives the LCD suction plate 4 to rise and fall through the longitudinal translation mechanism 2.

[0046] Then the polarizer is placed on the steel strip 5, and the steel strip 5 is bolted to the top outer side of the first positioning frame 23 and the second positioning frame 24 away from one end;

[0047] Then, according to the operation of the lifting angle mechanism 6, the initial attachment angle is provided to the steel strip 5. At this time, the operation of the lifting angle adjustment motor 29 drives the adjustment thread column 35 to rotate. The rotation of the adjustment thread column 35 drives the threaded lifting block 32 to rise and fall. The rise and fall of the lifting block 32 is limited by the sliding of the second detection plate 33 inside the second limit switch 34. At the same time, the rise and fall of the lifting block 32 drives the second positioning frame 24 to rise and fall synchronously. The second positioning frame 24 is adjusted synchronously by the sliding connection between the third guide rail 30 and the third slider 31.

[0048] After adjustment, the electromagnet 3 attracts and applies pressure to the steel strip 5, thus pressing the polarizer onto the LCD panel. Then, the longitudinal translation mechanism 2 moves the electromagnet 3. At this time, the displacement drive motor 15 drives the lead screw 16 to rotate via the synchronous belt. The rotation of the lead screw 16 moves the threaded slider 17, which in turn moves the electromagnet 3. The height adjustment motor 13 moves in coordination with the sliding connection between the second guide rail 18 and the second slider 19. Thus, the entire polarizer is attached to the LCD panel.

[0049] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A magnetic attachment mechanism, characterized in that, The device includes an LCD height adjustment mechanism (1), a longitudinal translation mechanism (2) is provided at the bottom of one side of the LCD height adjustment mechanism (1), an electromagnet (3) is provided on the inner side of the bottom end of the longitudinal translation mechanism (2), an LCD suction plate (4) is provided at the bottom of the longitudinal translation mechanism (2), a steel strip (5) is provided at the bottom of the LCD suction plate (4), and a lifting angle mechanism (6) is provided at the bottom of the steel strip (5). The LCD height adjustment mechanism (1) includes a support frame, a first guide rail (8), a first slider (9), a first connecting frame (12), a height adjustment motor (13), and a second connecting frame (21). The first guide rail (8) is fixed at both ends on one side of the support frame. The first slider (9) is slidably connected to the outer side of one side of the first guide rail (8). The first connecting frame (12) is fixed on one side of the two first sliders (9). The height adjustment motor (13) is fixed on one side of the top of the support frame. The push rod of the height adjustment motor (13) is fixed to the first connecting frame (12). The second connecting frame (21) is fixed at the bottom of the first connecting frame (12) on the side away from the support frame. The longitudinal translation mechanism (2) includes a connecting plate (14), a displacement drive motor (15), a lead screw (16), a threaded slider (17), and a base plate (20). The top of the connecting plate (14) is bolted to the second connecting frame (21). The lead screw (16) is rotatably connected to the inner side of the bottom end of the connecting plate (14). The displacement drive motor (15) is fixed to one end of the top of the connecting plate (14). The output end of the displacement drive motor (15) is connected to the outer side of one end of the lead screw (16) via a synchronous belt. The threaded slider (17) is threaded to the outer side of the lead screw (16). The bottom of the threaded slider (17) is fixed to the electromagnet (3). The base plate (20) is fixed to the bottom end of the connecting plate (14) and located at the bottom of the electromagnet (3). The bottom of the base plate (20) is bolted to the LCD suction plate (4). The lifting mechanism (6) includes a fixed frame, a fourth guide rail, a fourth slider, a support plate (22), a first positioning frame (23), a second positioning frame (24), a first limiting block (27), a second limiting block (28), a lifting adjustment motor (29), a lifting block (32), and an adjusting threaded column (35). The first positioning frame (23) is bolted to one end of the top of the support plate (22), and the fourth guide rail is fixed to both sides of the other end of the top of the support plate (22). The fourth slider is slidably connected to the outer side of the top of the fourth guide rail. The top of the two fourth sliders is fixed with a fixed frame. The top of the fixed frame away from the first positioning frame (23) is provided with a second positioning frame (24), and the first positioning frame (23) and the second positioning frame (24) are connected to the first positioning frame (27) and the second positioning block (28). The top of the two positioning frames (24) is bolted to the outer side of the steel strip (5) at one end away from each other. The two sides of the fixed frame near the first positioning frame (23) are fixed with first limiting blocks (27). The two sides of the support plate (22) at one end and at the end of the first limiting block (27) away from the first positioning frame (23) are fixed with second limiting blocks (28). The top of the fixed frame is slidably connected with a lifting block (32). The lifting block (32) is bolted to the second positioning frame (24). The bottom of the fixed frame is fixed with a lifting angle adjustment motor (29). The output end of the lifting angle adjustment motor (29) is connected with an adjustment threaded column (35). The outer side of the adjustment threaded column (35) is threadedly connected to the lifting block (32).

2. The magnetic attachment mechanism according to claim 1, characterized in that, The first connecting frame (12) has a first detection plate (11) bolted to one end near the support frame, and a first limit switch (10) is evenly fixed to one side of the support frame.

3. The magnetic attachment mechanism according to claim 1, characterized in that, The connecting plate (14) is fixed with a second guide rail (18) on the inner side of the bottom end and on both sides of the threaded slider (17). The second guide rail (18) is slidably connected to the outer side of the bottom end of the second guide rail (18). The bottom of the second slider (19) is fixed to the electromagnet (3).

4. The magnetic attachment mechanism according to claim 1, characterized in that, The fixed frame is fixed with a third guide rail (30) on both sides near the second positioning frame (24), and the second positioning frame (24) is fixed with a third slider (31) on both sides near the fixed frame. The third slider (31) is slidably connected to the third guide rail (30).

5. The magnetic attachment mechanism according to claim 1, characterized in that, A second detection plate (33) is bolted to one side of the lifting block (32), and a second limit switch (34) is fixed to the inner side of the fixing frame and at the top and bottom of one side of the lifting block (32).

6. The magnetic attachment mechanism according to claim 1, characterized in that, Tensioning mechanisms (7) are installed on both sides of the bottom of the fixed frame away from the support plate (22). The tensioning mechanism (7) includes a push rod motor (25) and a synchronizing block (26). The push rod motor (25) is fixed on both sides of the bottom of the fixed frame away from the support plate (22). The push rod of the push rod motor (25) passes through the fixed frame and is connected to the synchronizing block (26). The bottom of the synchronizing block (26) is fixed to the support plate (22).

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