A protective device for small-pitch LED display screens

Abstract

The present invention discloses a protective device applied to a small-pitch LED display screen, and relates to the technical field of small-pitch LED display screens, including an LED display and a display screen frame, wherein the display screen frames are spliced ​​together to form a display screen frame group, and a corner protection component used in conjunction with an LED assembly component is installed on the back of the LED display. When the LED display is transported, the corner protection component can cover the corners of the LED display when it is unfolded outward, thereby avoiding bumps during transportation. When the LED display needs to be spliced ​​to form an LED display module, the corner protection component is retracted inward, and when several LED displays are spliced, there will be no corner protection components against each other, resulting in a large interface gap, that is, it can protect the LED display while also reducing the splicing gap.

Description

Technical Field

[0001] The present invention relates to the technical field of small-pitch LED display screens, and in particular to a protective device applied to small-pitch LED display screens. Background Art

[0002] Publication (announcement) No. CN115171551B discloses a small-pitch LED display screen that is anti-collision, belonging to the field of semiconductor technology. It mainly includes an LED module and a protective structure installed on the LED module. The LED module includes a bottom shell, a circuit board fixedly installed on the front of the bottom shell, and a plurality of LED lamp beads are installed in an array on the circuit board. The protective structure includes a guard plate that can resist the side and front of the bottom shell to protect the LED lamp beads on the circuit board from collision.

[0003] The existing protection method is that the guard plate is relative to the opening, and the sliding guard plate can drive the guard plate to be accommodated in the interlayer, so that the guard plate can be easily folded up when assembling the LED module. The guard plate can only protect the four edges of the LED module, but cannot protect the four corners of the LED module. The corners of the display screen are most likely to be bumped. Once the corners are bumped with great force, the LED display screen is likely to be broken and damaged. Summary of the invention

[0004] The purpose of the present invention is to provide a protective device applied to a small-pitch LED display screen to solve the above-mentioned problem.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a protective device applied to a small-pitch LED display screen, comprising an LED display and a display screen frame, wherein the display screen frames are spliced ​​together to form a display screen frame group, each of the display screen frames is installed with an LED assembly component, and a corner protection component used in conjunction with the LED assembly component is installed on the back of the LED display, and the LED display is spliced ​​on the display screen frame group to form an LED display module.

[0006] Preferably, the LED display includes an LED board, an LED screen, a back frame and a circuit box, a plurality of adhesive points are arranged on the front of the LED board, the LED screen is fixed to the LED board by the adhesive points, and a back frame and a circuit box are fixed on the back of the LED board, wherein notches are provided at the four end corners of the back frame; the single-chip microcomputer in the circuit box is electrically connected to the LED screen through wires, so as to control each of the LED screens.

[0007] Preferably, the display screen frame includes a rectangular frame, an oblique frame and a reinforcement sleeve, the reinforcement sleeve is provided with four strip grooves, four oblique frames fixed on the outer circumference of the reinforcement sleeve cover the strip grooves, the four oblique frame ports are fixed at the corners of the rectangular frame, and the oblique frames are arranged along the diagonal lines of the rectangular frame.

[0008] Preferably, the LED assembly assembly comprises an assembly rectangular sleeve, a positioning sleeve, a locking column and a locking plate, four assembly rectangular sleeves and a motor sealing plate are arranged on the outer wall of the positioning sleeve, locking columns are fixed on the outer peripheral surface of the positioning sleeve, and the locking plates are symmetrically fixed on both side surfaces of the assembly rectangular sleeve;

[0009] The positioning sleeve is inserted into the reinforcement sleeve, the bolt passes through the locking column and engages with the port of the reinforcement sleeve, the assembly rectangular sleeve is correspondingly inserted into the inclined frame, and the assembly rectangular sleeve is connected to the back frame through the bolt, and the port of the assembly rectangular sleeve is also inserted into the notch, and the bolt passes through the locking plate and engages with the end face of the inclined frame.

[0010] Preferably, the corner protection assembly includes a reduction motor, a motor accommodating box, a transmission component, a telescopic limit component, a sliding and lifting component and protective corners, the reduction motor is placed in the motor accommodating box, the motor accommodating box is connected to the motor covering plate, the transmission component is assembled in the assembly rectangular sleeve, one end of the transmission component is connected to the reduction motor, the telescopic limit component is placed in the assembly rectangular sleeve, the other end of the transmission component is connected to the sliding and lifting component, the sliding and lifting component rests on the telescopic limit component, and the sliding and lifting component is connected to the protective corners.

[0011] Preferably, the transmission component includes a transmission shaft, a main bevel gear, a secondary bevel gear and a transmission bevel gear. The shaft of the main bevel gear is movably connected to the bearing of the positioning sleeve. The secondary bevel gear is meshed with the main bevel gear and fixed on the shaft of the reduction motor. The transmission shaft is placed in an assembly rectangular sleeve. One end of the transmission shaft is meshed with the main bevel gear through the transmission bevel gear, and the other end of the transmission shaft is connected to a partition passing through the inside of the assembly rectangular sleeve.

[0012] Preferably, the sliding and lifting components include a slide plate, a push plate, a push-down block and a connecting rod. The thread on the outer wall of the transmission shaft engages with the slide plate, the push plate connected to the side of the slide plate is connected to the push-down block, the slide plate slides along the top wall of the assembled rectangular sleeve, and the push-down block is movably connected to the bottom surface of the protective corner through two front and rear connecting rods.

[0013] Preferably, a strip groove is left between the partition and the assembly rectangular sleeve, and the telescopic limit component includes a baffle, a return spring, a bottom plate and a corner limit plate, and the bottom plate passes through the two ends of the strip groove and is respectively connected to the baffle and the corner limit plate, wherein the two ends of the return spring are fixed to the baffle and the partition, the bottom surface of the push-down block contacts the bottom plate, and the corner limit plate covers the outer wall of the protective corner.

[0014] Preferably, two symmetrical stabilizing plates are connected to the side surfaces of the slide plate, and the stabilizing plates are movably connected to the top wall of the assembled rectangular sleeve to increase the contact area.

[0015] Preferably, the edge of one side of the LED board connected to the assembly rectangular sleeve is arranged to be inclined, and the inner wall of the corner limiting plate is movably connected to the end corner of the LED board through a roller.

[0016] Technical effects and advantages of the present invention:

[0017] By providing a corner protection component that can protect the corners of the LED display, the corner protection component can cover the corners of the LED display when it is transported, thereby avoiding bumps during transportation. When the LED display needs to be spliced ​​to form an LED display module, the corner protection component is retracted inward. When several LED displays are spliced, the corner protection components will not press against each other to cause a large interface gap. This can protect the LED display while also reducing the splicing gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall front view of the assembly of the present invention;

[0019] Figure 2 It is the overall back view of the assembly of the present invention;

[0020] Figure 3 A connection diagram of a single LED display and a display screen frame of the present invention;

[0021] Figure 4 This is a structural diagram of the protective corner retracted assembly rectangular sleeve of the present invention;

[0022] Figure 5 An exploded view of the present invention;

[0023] Figure 6 For the present invention Figure 5 A magnified image of point A;

[0024] Figure 7 This is a diagram showing the LED display and display screen frame being separated from each other according to the present invention;

[0025] Figure 8 For the present invention Figure 7 The enlarged view of point B;

[0026] Fig. 9 This is a partial state diagram of the protective corner protection LED screen of the present invention;

[0027] Fig.10 It is a partial state diagram of the protective corner retracted into the rectangular sleeve of the present invention;

[0028] Fig.11 This is a cross-sectional view of the LED screen for protecting corners according to the present invention;

[0029] Fig.12 This is a structural diagram of embodiment 2 of the present invention.

[0030] In the figure:

[0031] 1. LED display; 11. LED board; 12. LED screen; 13. back frame; 14. circuit box; 2. display screen frame; 21. rectangular frame; 22. inclined frame; 23. reinforcement sleeve; 3. LED assembly component; 31. assembly rectangular sleeve; 32. positioning sleeve; 33. locking column; 34. locking plate; 35. motor sealing plate; 4. corner protection component; 41. reduction motor; 42. motor accommodating box; 43. transmission component; 431. transmission shaft; 432. main bevel gear; 433. secondary bevel gear; 434. transmission bevel gear; 44. sliding lifting component; 441. slide plate; 442. push plate; 443. push down block; 444. connecting rod; 45. telescopic limit component; 451. baffle; 452. reset spring; 453. bottom plate; 454. corner limit plate; 46. protective corner. DETAILED DESCRIPTION

[0032] 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.

[0033] Embodiment 1:

[0034] Reference Figure 1-Figure 11 , which is the first embodiment of the present invention, provides a protective device for a small-pitch LED display screen, including an LED display 1 and a display screen frame 2. The display screen frames 2 are spliced ​​together to form a display screen frame group. Each display screen frame 2 is installed with an LED assembly component 3. The back of the LED display 1 is installed with a corner protection component 4 used in conjunction with the LED assembly component 3. The LED display 1 is spliced ​​on the display screen frame group to form an LED display module.

[0035] A plurality of display screen frames 2 are arranged to be spliced ​​together to form a display screen frame group, which constitutes a support structure for the subsequent construction of the LED display 1. Since the corners of the display screen are most susceptible to bumps, deformation during the bumping process may cause damage. In order to solve this technical problem, a corner protection component 4 capable of protecting the corners of the LED display 1 is provided for protection. When the LED display 1 is transported, the corner protection component 4 can cover the corners of the LED display 1 when it is expanded outward, thereby avoiding bumps during transportation. When the LED display 1 is spliced ​​to form an LED display module, the corner protection component 4 is retracted inward. In this way, when several LED displays 1 are spliced ​​together, the corner protection components 4 will not press against each other to cause a large interface gap. That is, the LED display 1 can be protected while the splicing gap can be reduced.

[0036] In order to facilitate the installation of the LED display 1, the LED assembly component 3 is set to be able to assemble the LED display 1 on the display frame 2. At the same time, the LED assembly component 3 is also detachable, which is convenient for subsequent replacement and has higher versatility.

[0037] The LED display 1 includes an LED board 11, an LED screen 12, a back frame 13 and a circuit box 14. A plurality of adhesive points are arranged on the front of the LED board 11, and the LED screen 12 is fixed to the LED board 11 through the adhesive points. The back frame 13 and the circuit box 14 are fixed on the back of the LED board 11, wherein the four end corners of the back frame 13 are provided with notches; the single-chip microcomputer in the circuit box 14 is electrically connected to the LED screen 12 through wires, and is used to control each of the LED screens 12.

[0038] The LED screen 12 is installed on the front side of the LED board 11, and the back side of the LED board 11 is connected to each LED screen 12 through a single chip microcomputer via a wire to control the partial picture displayed by each LED screen 12. The combination of several LED screens 12 forms an enlarged picture.

[0039] The display screen frame 2 includes a rectangular frame 21, an inclined frame 22 and a reinforcing sleeve 23. The reinforcing sleeve 23 is provided with four strip grooves. Four inclined frames 22 fixed on the outer circumference of the reinforcing sleeve 23 cover the strip grooves. The four inclined frames 22 ports are fixed at the corners of the rectangular frame 21, and the inclined frames 22 are arranged along the diagonal lines of the rectangular frame 21.

[0040] The rectangular frame 21, the inclined frame 22 and the reinforcement sleeve 23 are made of steel structure. The inclined frame 22 is provided with four welding means to fix it to the reinforcement sleeve 23. The cross-section of the inclined frame 22 adopts a "U"-shaped structure. The connection between the inclined frame 22 and the rectangular frame 21 is fixed with reinforcing ribs, so that the strength of the overall connection is increased and it is not easy to deform.

[0041] The LED assembly component 3 includes an assembly rectangular sleeve 31, a positioning sleeve 32, a locking column 33 and a locking plate 34. Four assembly rectangular sleeves 31 and a motor sealing plate 35 are arranged on the outer wall of the positioning sleeve 32. The locking column 33 is fixed on the outer peripheral surface of the positioning sleeve 32. The locking plate 34 is symmetrically fixed on both side surfaces of the assembly rectangular sleeve 31.

[0042] The positioning sleeve 32 is inserted into the reinforcement sleeve 23, the bolt passes through the locking column 33 and engages with the port of the reinforcement sleeve 23, the assembly rectangular sleeve 31 is correspondingly inserted into the inclined frame 22, and the assembly rectangular sleeve 31 is connected to the back frame 13 by bolts, and the port of the assembly rectangular sleeve 31 is also inserted into the notch, and the bolt passes through the locking plate 34 and engages with the end face of the inclined frame 22.

[0043] The inner diameter of the reinforcing sleeve 23 is slightly larger than the outer diameter of the positioning sleeve 32, and the locking column 33 is inserted into the reinforcing sleeve 23 when the positioning sleeve 32 is inserted, and the locking column 33 will contact the reinforcing sleeve 23, and the locking column 33 and the reinforcing sleeve 23 are fixed by bolts, and the assembly rectangular sleeve 31 can also be inserted into the inclined frame 22, and a side panel is fixed on the port of the assembly rectangular sleeve 31, and the assembly rectangular sleeve 31 is inserted into the notch, and the side panel will contact the inner diameter of the back frame 13, and the side panel and the back frame 13 are fixed together by bolts to realize the connection between the LED assembly component 3 and the LED display 1 and the display screen frame 2.

[0044] The corner protection assembly 4 includes a reduction motor 41, a motor accommodating box 42, a transmission component 43, a telescopic limiting component 45, a sliding lifting component 44 and a protective corner 46. The reduction motor 41 is placed in the motor accommodating box 42, the motor accommodating box 42 is connected to the motor sealing plate 35, the transmission component 43 is assembled in the assembly rectangular sleeve 31, one end of the transmission component 43 is connected to the reduction motor 41, the telescopic limiting component 45 is placed in the assembly rectangular sleeve 31, the other end of the transmission component 43 is connected to the sliding lifting component 44, the sliding lifting component 44 is against the telescopic limiting component 45, and the sliding lifting component 44 is connected to the protective corner 46.

[0045] The reduction motor 41 is controlled by the single chip microcomputer of the circuit box 14. The reduction motor 41 is fixed by the motor housing box 42 and the motor sealing plate 35. The reduction motor 41 is started upon receiving the control signal, thereby transmitting the power to the sliding and lifting component 44 through the transmission component 43 to drive the protective corner 46 to slide outward and rise along the diagonal line to protect the four end corners of the LED display 1.

[0046] The transmission component 43 includes a transmission shaft 431, a main bevel gear 432, a secondary bevel gear 433 and a transmission bevel gear 434. The shaft of the main bevel gear 432 is movably connected to the bearing of the positioning sleeve 32. The secondary bevel gear 433 is meshed with the main bevel gear 432 and fixed on the shaft of the reduction motor 41. The transmission shaft 431 is placed in the assembly rectangular sleeve 31. One end of the transmission shaft 431 is meshed with the main bevel gear 432 through the transmission bevel gear 434, and the other end of the transmission shaft 431 is connected to the partition passing through the inside of the assembly rectangular sleeve 31.

[0047] After the reduction motor 41 is started, the power is transmitted to the transmission shaft 431. The transmission shaft 431 rotates synchronously with the secondary bevel gear 433 to drive the main bevel gear 432 to rotate. The main bevel gear 432 then drives the four transmission bevel gears 434 to rotate, so that the four slides 441 can move outward or inward synchronously along the diagonal.

[0048] The sliding and lifting component 44 includes a slide plate 441, a push plate 442, a push-down block 443 and a connecting rod 444. The thread on the outer wall of the transmission shaft 431 is engaged with the slide plate 441. The push plate 442 connected to the side of the slide plate 441 is connected to the push-down block 443. The slide plate 441 slides along the top wall of the assembled rectangular sleeve 31. Two symmetrical stabilizing plates are also connected to the side of the slide plate 441. The stabilizing plates are movably connected to the top wall of the assembled rectangular sleeve 31 to increase the contact area. The push-down block 443 is movably connected to the bottom surface of the protective corner 46 through the front and rear connecting rods 444.

[0049] A strip groove is left between the partition and the assembly rectangular sleeve 31, and the telescopic limiting component 45 includes a baffle 451, a return spring 452, a bottom plate 453 and a corner limit plate 454. The bottom plate 453 passes through the two ends of the strip groove and is respectively connected to the baffle 451 and the corner limit plate 454, wherein the two ends of the return spring 452 are fixed to the baffle 451 and the partition, the bottom surface of the push-down block 443 contacts the bottom plate 453, and the corner limit plate 454 covers the outer wall of the protective corner 46. The edge of one side of the LED board 11 connected to the assembly rectangular sleeve 31 is inclined, and the inner wall of the corner limit plate 454 is movably connected to the end corner of the LED board 11 through a roller.

[0050] An external thread is provided on the outer wall of the transmission shaft 431, and an internal thread is provided in the hole opened on the slide plate 441. During the positive and negative rotation of the transmission shaft 431, the slide plate 441 can be driven to slide back and forth along the assembled rectangular sleeve 31. The slide plate 441 can maintain the sliding state of the slide plate 441 by means of two stabilizing plates. At the same time, the stabilizing plates also reduce the friction with the assembled rectangular sleeve 31 through the balls provided on the top. When the slide plate 441 moves diagonally toward the outside of the display screen, the slide plate 441 pushes the push-down block 443 to move through the push plate 442. Since the corner limit plate 454 is against the protective corner 46, during the outward movement of the push-down block 443, the protective corner 46 also pushes the corner limit plate 454 outward synchronously. Move, at this time, the baffle 451 slowly squeezes the return spring 452, so that the return spring 452 is compressed, and the corner limit plate 454 moves outward until the return spring 452 is fully compressed, and the baffle 451 and the corner limit plate 454 can no longer move, and the push-down block 443 continues to move outward. Since the protective corner 46 is blocked by the corner limit plate 454, the protective corner 46 can only move upward along the corner limit plate 454. At this time, the connecting rod 444 slowly rotates from an inclined state to a vertical state, and the protective corner 46 moves upward to cover the end corner of the LED board 11, and then the reduction motor 41 stops working. At this time, the four end corners of the LED board 11 are protected, and the end corners are protected during transportation to prevent them from being bumped.

[0051] When assembly is required, the reduction motor 41 drives the transmission shaft 431 to rotate in the opposite direction. At this time, the slide plate 441 slides inward along the diagonal, and the push-down block 443 also moves inward synchronously. The baffle 451 slowly rotates from the inclined state to the inclined state, and pulls the corner limit plate 454 to move inward. Due to the inclined setting of the edge of the LED board 11, the protective corner 46 slowly slides along the inclined surface and disengages from the end corner of the LED board 11, and in the process of the protective corner 46 moving inward, the return spring 452 slowly rebounds and pushes the corner limit plate 454 to move inward synchronously with the protective corner 46 until the protective corner 46 disengages from the end corner of the LED board 11 and retracts into the assembly rectangular sleeve 31. At this time, there is no other structure on the outer edge of the LED board 11. When the LED board 11 is spliced, there is no protective structure, which leads to the problem of increased gap. Through hidden corner protection, the end corner can be protected during transportation and can also be retracted into the assembly rectangular sleeve 31 during splicing to achieve the effect of small splicing gap.

[0052] Embodiment 2:

[0053] Reference Fig.12This embodiment is different from the first embodiment. During the implementation of the first embodiment, it was found that the overall weight is relatively large due to the need to set up a reduction motor 41 and a transmission component 43. When assembled on the LED display 1, the weight of the LED display 1 is increased, which is inconvenient to transport. The difference between this embodiment and the first embodiment is the power structure that drives the sliding lifting component 44 to slide. The present embodiment is driven pneumatically. The slide plate 441 is connected to the sealed telescopic rod, and the telescopic rod is connected to the air pump through an air pipe. The air pump injects gas into the air pipe or extracts gas to drive the telescopic rod to extend and retract, which is used to push the slide plate 441 to slide to achieve the problem that the protective corners 46 of the first embodiment have no protective structure when the LED boards 11 are spliced, resulting in an increase in the gap. Through hidden corner protection, the end corners can be protected during transportation and can also be retracted into the assembly rectangular sleeve 31 during splicing to achieve a small splicing gap effect.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective device for a small pitch LED display screen, comprising an LED display (1) and a display screen frame (2), characterized in that: The display screen frames (2) are spliced ​​together to form a display screen frame group, each of the display screen frames (2) is installed with an LED assembly component (3), a corner protection component (4) used in conjunction with the LED assembly component (3) is installed on the back of the LED display (1), and the LED display (1) is spliced ​​on the display screen frame group to form an LED display module; The corner protection component (4) comprises a reduction motor (41), a motor accommodating box (42), a transmission component (43), a telescopic limiting component (45), a sliding lifting component (44) and a protective corner (46); the reduction motor (41) is placed in the motor accommodating box (42); the motor accommodating box (42) is connected to the motor sealing plate (35); the transmission component (43) is assembled in the assembly rectangular sleeve (31); one end of the transmission component (43) is connected to the reduction motor (41); the telescopic limiting component (45) is placed in the assembly rectangular sleeve (31); the other end of the transmission component (43) is connected to the sliding lifting component (44); the sliding lifting component (44) abuts against the telescopic limiting component (45); and the sliding lifting component (44) is connected to the protective corner (46); The sliding lifting component (44) includes a slide plate (441), a push plate (442), a push-down block (443) and a connecting rod (444); the thread on the outer wall of the transmission shaft (431) is meshed with the slide plate (441); the push plate (442) connected to the side of the slide plate (441) is connected to the push-down block (443); the slide plate (441) slides along the top wall of the assembled rectangular sleeve (31); the push-down block (443) is movably connected to the bottom surface of the protective corner (46) through two front and rear connecting rods (444); A strip groove is left between the partition and the assembly rectangular sleeve (31), and the telescopic limiting component (45) includes a baffle (451), a return spring (452), a bottom plate (453) and a corner limit plate (454), and the bottom plate (453) passes through the two ends of the strip groove and is respectively connected to the baffle (451) and the corner limit plate (454), wherein the two ends of the return spring (452) are fixed to the baffle (451) and the partition, the bottom surface of the push-down block (443) is in contact with the bottom plate (453), and the corner limit plate (454) covers the outer wall of the protective corner (46).

2. The protective device for a small-pitch LED display screen according to claim 1, characterized in that: The LED display (1) comprises an LED board (11), an LED screen (12), a back frame (13) and a circuit box (14); a plurality of adhesive points are arranged on the front of the LED board (11); the LED screen (12) is fixed to the LED board (11) via the adhesive points; a back frame (13) and a circuit box (14) are fixed to the back of the LED board (11); notches are provided at the four end corners of the back frame (13); a single chip microcomputer in the circuit box (14) is electrically connected to the LED screen (12) via a wire, and is used to control each of the LED screens (12).

3. The protective device for a small pitch LED display screen according to claim 2, characterized in that: The display screen frame (2) comprises a rectangular frame (21), an oblique frame (22) and a reinforcing sleeve (23); the reinforcing sleeve (23) is provided with four strip grooves; four oblique frames (22) fixed on the outer peripheral surface of the reinforcing sleeve (23) cover the strip grooves; the four oblique frames (22) are fixed at the corners of the rectangular frame (21); and the oblique frames (22) are arranged along the diagonal lines of the rectangular frame (21).

4. The protective device for a small pitch LED display screen according to claim 3, characterized in that: The LED assembly component (3) comprises an assembly rectangular sleeve (31), a positioning sleeve (32), a locking column (33) and a locking plate (34); four assembly rectangular sleeves (31) and a motor sealing plate (35) are arranged on the outer wall of the positioning sleeve (32); locking columns (33) are fixed on the outer peripheral surface of the positioning sleeve (32); and the locking plates (34) are symmetrically fixed on both side surfaces of the assembly rectangular sleeve (31); The positioning sleeve (32) is inserted into the reinforcement sleeve (23), the bolt passes through the locking column (33) and engages with the port of the reinforcement sleeve (23), the assembly rectangular sleeve (31) is correspondingly inserted into the inclined frame (22), and the assembly rectangular sleeve (31) is connected to the back frame (13) through the bolt, and the port of the assembly rectangular sleeve (31) is also inserted into the notch, and the bolt passes through the locking plate (34) and engages with the end surface of the inclined frame (22).

5. The protective device for a small pitch LED display screen according to claim 4, characterized in that: The transmission component (43) comprises a transmission shaft (431), a main bevel gear (432), a secondary bevel gear (433) and a transmission bevel gear (434); the shaft of the main bevel gear (432) is movably connected to the bearing of the positioning sleeve (32); the secondary bevel gear (433) is meshed with the main bevel gear (432) and fixed on the shaft of the reduction motor (41); the transmission shaft (431) is placed in the assembly rectangular sleeve (31); one end of the transmission shaft (431) is meshed with the main bevel gear (432) through the transmission bevel gear (434); and the other end of the transmission shaft (431) is connected to a partition plate passing through the interior of the assembly rectangular sleeve (31).

6. The protective device for a small pitch LED display screen according to claim 5, characterized in that: The side of the slide plate (441) is also connected to two symmetrical stabilizing plates, which are movably connected to the top wall of the assembled rectangular sleeve (31) to increase the contact area.

7. The protective device for a small pitch LED display screen according to claim 6, characterized in that: The edge of one side of the LED board (11) connected to the assembly rectangular sleeve (31) is arranged to be inclined, and the inner wall of the corner limiting plate (454) is movably connected to the end corner of the LED board (11) via a roller.

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