A modular LED display and its assembly method

Abstract

This invention relates to the field of modular display technology, specifically to a modular LED display and its assembly method. The modular LED display includes a frame and a display module. Each display module comprises several fixed base shells arranged in a matrix on the front side of the frame. A display screen is movably mounted on the front side of each fixed base shell. Fixing pins are movably mounted on the four sides of each fixed base shell. A driving component is mounted on each fixed base shell to drive the fixing pins away from the center of the fixed base shell. This invention uses fixing pins to lock the fixed base shells. During installation and disassembly, simply pressing the display screen causes the driving component to move the fixing pins closer to the center of the fixed base shell, thus releasing the lock between adjacent fixed base shells. This allows the display module that needs to be replaced to be removed individually without disassembling the entire row of display modules.

Description

Technical Field

[0001] This invention relates to the field of modular display technology, specifically to a modular LED display and its assembly method. Background Technology

[0002] LED displays are composed of a large number of light-emitting diode (LED) pixels, each of which is self-illuminating (RGB three-color LED) and mixes colors by controlling brightness. Modular LED displays are formed by assembling multiple LED display modules together to create a super-large screen, mainly used in outdoor advertising, stage performances, stadiums and other scenarios with high requirements for seamless display.

[0003] Existing modular LED displays typically use mortise and tenon joints to connect the screens. The advantage of this installation method is that it is quick to assemble, requiring little or no fixing bolts to complete the assembly of the entire screen. However, this assembly method also has the following drawbacks: when one LED display module is damaged, since adjacent modules are connected by mortise and tenon joints, the damaged LED display module can only be replaced by disassembling the entire row of LED display modules from the edge, which is quite troublesome. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a modular LED display, comprising a keel frame and a display module. The display module includes several fixed base shells arranged in a matrix on the front side of the keel frame. A display screen is movably mounted on the front side of each fixed base shell. Fixing pins are movably mounted on the four sides of each fixed base shell. A driving component is installed on each fixed base shell to drive the fixing pins to move away from the center of the fixed base shell. Fixing grooves that engage with the fixing pins are also provided on the four sides of the fixed base shell. A locking component is installed on the horizontally arranged fixed base shell to restrict the movement of the fixing pins away from the center of the fixed base shell. A limiting component is also installed on the fixed base shell to lock the fixing pins. A matrix of elastic telescopic rods is fixedly connected between the fixed base shell and the display screen.

[0005] The fixing module includes square tube buckles that are movably installed on the keel frame and located on the left and right sides of the fixed bottom shell. The front side of the square tube buckles is fixedly connected to a plurality of mounting columns distributed in a matrix, and the outer ring wall of the mounting columns is provided with annular grooves.

[0006] The fixed base shell has a mounting hole for the mounting column to pass through at the corresponding part. The horizontally set fixing pin has a limiting groove for the mounting column to pass through. When the fixing pin extends to the outside of the fixed base shell, the fixing pin is inserted into the annular groove.

[0007] In one possible implementation, the fixed base is rectangular, and the end of the fixing pin away from the center of the fixed base extends through the outside of the fixed base and engages with the fixing groove on the adjacent fixed base. The length of the horizontally arranged fixing pin is greater than the length of the vertically arranged fixing pin.

[0008] In one possible implementation, the drive assembly includes a rotating shaft rotatably mounted at the center of a fixed base, a drive gear rotatably mounted on the front end of the outer ring wall of the rotating shaft, a rack provided on the side of the fixed pin near the drive gear, the rack meshing with the drive gear, a threaded post threadedly connected to the front end of the rotating shaft, a movable rod slidably mounted on the front end of the threaded post, and the front end of the movable rod being fixedly connected to the rear side of the display screen.

[0009] In one possible implementation, the fixing pin is further provided with a through hole, and a fixing block 1 located inside the through hole is fixedly installed on the fixing base. A return spring 1 for driving the fixing pin to move away from the center of the fixing base is fixedly connected between the end of the through hole away from the center of the fixing base and the fixing block 1.

[0010] In one possible implementation, the locking assembly includes a guide groove formed on the front side of the fixing pin, a guide rod slidably mounted inside the guide groove, a movable rod two slidably mounted on the fixed base, a swing arm rotatably mounted at the front end of the movable rod two, the end of the swing arm away from the movable rod two being rotatably connected to the guide rod, a telescopic spring being fixedly connected between the fixed base and the swing arm, and an elongated hole for the movable rod two to move on the fixing pin.

[0011] In one possible implementation, the guide groove includes an entry section, a bending section, and an exit section, which are connected end-to-end to form a closed loop. Each of the entry section, bending section, and exit section has a groove with a deep start and a shallow finish. A step is formed at the connection between the entry section, bending section, and exit section to prevent the guide rod from moving in the opposite direction.

[0012] In one possible implementation, the limiting assembly includes a limiting block that slides vertically and vertically on the front side of the fixed base shell. The limiting block is inserted into a corresponding limiting groove. A wedge block one is fixedly connected to the end of the limiting block away from the corresponding fixing pin. A fixing block two is fixedly connected to the front side of the fixing pin, located on the side of the wedge block one away from the limiting block. A reset spring two is fixedly connected between the fixing block two and the wedge block one. A wedge block two located in front of the wedge block one is fixedly connected to the rear side of the display screen.

[0013] In one possible implementation, the square tube buckle is shaped like a "Z" and a fixing post is fixedly connected in the "Z" shaped groove of the square tube buckle. The keel frame has fixing holes that are inserted and matched with the fixing post.

[0014] The beneficial effects of this invention are as follows: 1. This invention uses a fixing pin to lock the fixed base shell. During installation and disassembly, simply press the display screen to drive the fixing pin towards the center of the fixed base shell, thereby releasing the lock between adjacent fixed base shells. This allows the display module that needs to be replaced to be removed individually without disassembling the entire row of display modules. During installation, after placing the fixed base shell in the corresponding position on the keel frame, simply press the display screen again to drive the fixing pin away from the center of the fixed base shell, locking the fixed base shell together with the adjacent fixed base shells. This makes installation more convenient.

[0015] 2. To ensure that the display screen remains pressed down during the installation and disassembly of the fixed base shell, i.e., the fixing pin is always retracted within the fixed base shell, this invention employs a locking component to lock the fixing pin. When the display screen is pressed down for the first time, the drive gear drives the fixing pin to move closer to the center of the fixed base shell, at which point the return spring is compressed. When the pressure on the display screen is released, the guide groove limits the guide rod, preventing the fixing pin from moving further away from the center of the fixed base shell. This ensures that the fixing pin remains retracted within the fixed base shell, eliminating the need for workers to constantly press down on the display screen during installation and disassembly, thus facilitating the removal and installation of the fixed base shell. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the display module of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the fixing module of the present invention.

[0019] Figure 4 This is a partial cross-sectional view of the drive gear of the present invention.

[0020] Figure 5 This is a planar structural diagram of the fixing pin of the present invention in the retracted state.

[0021] Figure 6 This is a three-dimensional structural diagram of the fixed bottom shell of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the locking component of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the guide groove of the present invention.

[0024] Figure 9 This is a partial cross-sectional view of the limiting component of the present invention.

[0025] In the diagram: 1. Keel frame; 11. Fixing hole; 2. Display module; 21. Fixing base shell; 211. Mounting hole; 22. Display screen; 23. Fixing pin; 231. Limiting groove; 232. Through hole; 24. Drive assembly; 241. Rotating shaft; 242. Drive gear; 243. Threaded column; 244. Movable rod one; 245. Fixing block one; 246. Return spring one; 25. Fixing groove; 26. Locking assembly; 261. Guide groove; 26 11. Entry section; 2612. Bending section; 2613. Exit section; 262. Guide rod; 263. Movable rod two; 264. Swing arm; 265. Telescopic spring; 27. Limiting assembly; 271. Limiting block; 272. Wedge block one; 273. Fixing block two; 274. Return spring two; 275. Wedge block two; 28. Elastic telescopic rod; 3. Fixing module; 31. Square tube buckle; 32. Fixing column; 33. Mounting column; 34. Annular groove. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Please see Figure 1 - Figure 9 A modular LED display includes a frame 1 and a display module 2. The display module 2 includes several fixed base shells 21 arranged in a matrix on the front side of the frame 1. A display screen 22 is movably mounted on the front side of the fixed base shell 21. Fixed pins 23 are movably mounted on the four sides of the fixed base shell 21. A driving component 24 is installed on the fixed base shell 21 to drive the fixed pins 23 to move towards the center of the fixed base shell 21. Fixed grooves 25 that are inserted and cooperate with the fixed pins 23 are also provided on the four sides of the fixed base shell 21. A locking component 26 is installed on the horizontally arranged fixed base shell 21 to restrict the movement of the fixed pins 23 away from the center of the fixed base shell 21. A limiting component 27 is also installed on the fixed base shell 21 to lock the fixed pins 23. Elastic telescopic rods 28 arranged in a matrix are fixedly connected between the fixed base shell 21 and the display screen 22.

[0028] The fixing module 3 includes square tube buckles 31 that are movably installed on the keel frame 1 and located on the left and right sides of the fixing bottom shell 21. Several mounting columns 33 are fixedly connected to the front side of the square tube buckles 31 in a matrix distribution. The outer ring wall of the mounting column 33 is provided with annular grooves 34.

[0029] The fixed base shell 21 has a mounting hole 211 for the mounting post 33 to pass through at the corresponding part. The horizontally arranged fixing pin 23 has a limiting groove 231 for the mounting post 33 to pass through. When the fixing pin 23 extends to the outside of the fixed base shell 21, the fixing pin 23 and the annular groove 34 are inserted and engaged.

[0030] In practical use, the square tube buckle 31 is fastened to the keel frame 1 from back to front. Then, the fixing pin 23 is driven by the drive component 24 to move towards the center of the fixing base shell 21, so that the fixing pin 23 retracts into the interior of the fixing base shell 21. At this time, the limiting groove 231 is just aligned with the mounting hole 211. Then, the fixing base shell 21 is installed onto the keel frame 1 from front to back. During installation, the front end of the mounting post 33 passes through the mounting hole 211 and extends into the interior of the fixing base shell 21. The front end of the mounting post 33 is just located in the limiting groove 231.

[0031] Then, the fixing pin 23 is driven by the drive component 24 to move away from the center of the fixing base shell 21. At this time, the limiting groove 231 and the mounting hole 211 are misaligned, and the edge of the fixing pin 23 is just inserted into the annular groove 34. The fixing pin 23 limits the annular groove 34, which can quickly fix the fixing base shell 21 and the square tube buckle 31 together, preventing the fixing base shell 21 from falling off. At the same time, the end of the fixing pin 23 protrudes to the outside of the fixing base shell 21. Then, the same steps are used to complete the installation of other fixing base shells 21. When the other fixing base shells 21 are installed, the fixing groove 25 just covers the corresponding fixing pin 23. The fixing groove 25 further limits the fixing pin 23, which can connect several spliced ​​fixing base shells 21 into a whole, further demonstrating the stability of the module 2 installation.

[0032] When one of the display modules 2 is damaged and needs to be replaced, the drive component 24 can be used to move the fixing pin 23 towards the center of the fixing base 21, so that the fixing pin 23 is released from the limiting position of the annular groove 34. At the same time, the end of the fixing pin 23 is separated from the fixing groove 25. Then, the fixing base 21 can be moved forward to remove it for replacement. It is not necessary to remove the entire row of displays for replacement, which makes it more convenient to use.

[0033] Please see Figure 2 and Figure 5The fixed base 21 is rectangular. The end of the fixed pin 23 away from the center of the fixed base 21 moves through to the outside of the fixed base 21 and is inserted into the fixed groove 25 on the adjacent fixed base 21. The length of the horizontally set fixed pin 23 is greater than the length of the vertically set fixed pin 23.

[0034] Please see Figure 2 , Figure 4 and Figure 5 The drive assembly 24 includes a rotating shaft 241 rotatably mounted at the center of the fixed base 21. A drive gear 242 is rotatably mounted on the front end of the outer ring wall of the rotating shaft 241. A rack is provided on the side of the fixed pin 23 near the drive gear 242, and the rack meshes with the drive gear 242. A threaded post 243 is threadedly connected to the front end of the rotating shaft 241. A movable rod 244 is slidably mounted on the front end of the threaded post 243. The front end of the movable rod 244 is fixedly connected to the rear side of the display screen 22. A groove is provided inside the threaded post 243. A protrusion is fixedly connected to the outer ring wall of the movable rod 244, and the protrusion is slidably connected to the groove.

[0035] In practical use, when you want to move the fixing pin 23 towards the center of the fixed base 21, simply press the display screen 22 and move it backward. When the display screen 22 moves backward, it will compress the elastic telescopic rod 28. The display screen 22 will drive the movable rod 244 to move backward. When the rear end of the movable rod 244 abuts against the threaded post 243, the movable rod 244 will drive the threaded post 243 to move backward together. The threaded post 243 will drive the rotating shaft 241 and the drive gear 242 to rotate clockwise. The drive gear 242 will push the fixing pin 23 towards the center of the fixed base 21, so that the fixing pin 23 retracts into the interior of the fixed base 21, thereby releasing the lock on the fixed base 21. This allows for quick and easy disassembly of the display module 2 without the need for tools.

[0036] Please see Figure 2 and Figure 5 The fixing pin 23 is also provided with a through hole 232. A fixing block 245 located inside the through hole 232 is fixedly installed on the fixing base 21. A return spring 246 for driving the fixing pin 23 to move away from the center of the fixing base 21 is fixedly connected between the end of the through hole 232 away from the center of the fixing base 21 and the fixing block 245.

[0037] In practical use, when the fixing pin 23 retracts into the fixed base 21, the return spring 246 is in a compressed state. The return spring 246 provides elastic force to the fixing pin 23 to move away from the center of the fixed base 21. When the pressure on the display screen 22 is released, the return force of the return spring 246 pushes the fixing pin 23 to move away from the center of the fixed base 21, so that the fixing pin 23 can return to the locked state. By constantly pushing the fixing pin 23 with the return spring 246, the fixing pin 23 is prevented from coming loose during the locking process.

[0038] Please see Figure 2 , Figure 5 and Figure 7 The locking assembly 26 includes a guide groove 261 opened on the front side of the fixing pin 23. A guide rod 262 is slidably installed inside the guide groove 261. A movable rod 263 is slidably installed back and forth on the fixed base shell 21. A swing arm 264 is rotatably installed at the front end of the movable rod 263. The end of the swing arm 264 away from the movable rod 263 is rotatably connected to the guide rod 262. A telescopic spring 265 is fixedly connected between the fixed base shell 21 and the swing arm 264. The fixing pin 23 has an elongated hole for the movable rod 263 to move.

[0039] Please see Figure 2 , Figure 5 , Figure 7 and Figure 8 The guide groove 261 includes an entry section 2611, a bending section 2612, and an exit section 2613. The entry section 2611, the bending section 2612, and the exit section 2613 are connected end to end to form a closed loop. The entry section 2611, the bending section 2612, and the exit section 2613 are all grooves with a deep start and a shallow end. A step is formed at the connection of the entry section 2611, the bending section 2612, and the exit section 2613 to prevent the guide rod 262 from moving in the opposite direction.

[0040] In practical use, to ensure that the display screen 22 remains pressed during the installation and removal of the fixed base shell 21, i.e., the fixing pin 23 is always retracted within the fixed base shell 21, the present invention provides a locking component 26 to lock the fixing pin 23. The process is as follows: when the display screen 22 is pressed, the drive gear 242 drives the fixing pin 23 to move towards the center of the fixed base shell 21. At this time, the return spring 246 is compressed. During the movement of the fixing pin 23 towards the center of the fixed base shell 21, the guide rod 262 will move along the entry section 2611 from the right... When the pressure on the display screen 22 is released, the fixing pin 23 will move a short distance away from the center of the fixed base 21. At this time, the guide rod 262 slides from the entry section 2611 into the bending section 2612 and is hooked by the bending part of the bending section 2612, so that the fixing pin 23 will no longer move away from the center of the fixed base 21. Thus, the fixing pin 23 is always retracted in the fixed base 21. The worker does not need to press the display screen 22 during the installation and disassembly of the fixed base 21, which facilitates the disassembly and installation of the fixed base 21.

[0041] During installation, in addition to pressing the display screen 22 for the first time, after placing the fixed base 21 on the corresponding position on the keel frame 1, the display screen 22 needs to be pressed again. At this time, the fixing pin 23 moves a small distance closer to the center of the fixed base 21, so that the guide rod 262 slides from the bend of the bend section 2612 to the left end of the removal section 2613. When the pressure on the display screen 22 is released, the fixing pin 23 moves away from the center of the fixed base 21. At this time, the guide rod 262 slides from the left end of the removal section 2613 to the right end, and finally falls from the right end of the removal section 2613 to the right end of the entry section 2611. At this time, the end of the fixing pin 23 away from the center of the fixed base 21 extends to the outside of the fixed base 21 and is inserted into the corresponding fixing groove 25 to fix the fixed base 21.

[0042] Because the entry section 2611, bending section 2612, and exit section 2613 are all grooves with a deep starting end and a shallow ending end, the depth of the ending end of the entry section 2611 is less than the depth of the starting end of the bending section 2612. Similarly, the depth of the ending end of the bending section 2612 is less than the depth of the starting end of the exit section 2613, and the depth of the ending end of the exit section 2613 is less than the depth of the starting end of the entry section 2611. Therefore, when the guide rod 262 slides, it can only slide sequentially along the entry section 2611, bending section 2612, and exit section 2613, and cannot move in the opposite direction. The guide rod 262 moves along the guide groove 261... When in motion, the movable rod 263 can move back and forth as the guide rod 262 moves in the guide groove 261. The swing arm 264 can rotate as the guide rod 262 moves up and down in the guide groove 261. The telescopic spring 265 is in a stretched state, which can always tighten the swing arm 264, so that the guide rod 262 remains close to the guide groove 261. At the same time, when the guide rod 262 moves up and down, the telescopic spring 265 will twist. The rebound force generated by the twist of the telescopic spring 265 will automatically restore the swing arm 264 to a horizontal state, so that the guide rod 262 can slide along the guide groove 261.

[0043] Please see Figure 2 , Figure 5 and Figure 9 The limiting component 27 includes a limiting block 271 that is slidably mounted on the front side of the fixed base shell 21. The limiting block 271 is inserted into the corresponding limiting groove 231. A wedge block 272 is fixedly connected to the end of the limiting block 271 away from the corresponding fixing pin 23. A fixing block 273 located on the side of the wedge block 272 away from the limiting block 271 is fixedly connected to the front side of the fixing pin 23. A reset spring 274 is fixedly connected between the fixing block 273 and the wedge block 272. A wedge block 275 located in front of the wedge block 272 is fixedly connected to the rear side of the display screen 22.

[0044] In practical use, when the fixing pin 23 is in the locked state, the return spring 274 provides elastic force to the wedge block 272 and the limiting block 271 to move closer to the corresponding fixing pin 23, so that the limiting block 271 is inserted into the corresponding limiting groove 231, which can fix the fixing pin 23 and prevent the fixing pin 23 from moving when it is shaken by external force. This prevents the fixing pin 23 from accidentally releasing the lock between the fixing groove 25 and the annular groove 34, and improves the locking firmness of the fixing pin 23.

[0045] When the fixed bottom case 21 needs to be disassembled, during the process of pressing the display screen 22, the display screen 22 first drives the first movable rod 244 to move backward. At the same time, the display screen 22 drives the second wedge block 275 to move backward. The second wedge block 275 is used to push the first wedge block 272 to move away from the corresponding fixed pin 23. The first wedge block 272 drives the limit block 271 to separate from the corresponding limit groove 231, releasing the locking of the fixed pin 23. After that, the rear end of the first movable rod 244 just abuts against the threaded column 243 and pushes the threaded column 243 to move backward, causing the driving gear 242 to rotate and driving the fixed pin 23 to move toward the center of the fixed bottom case 21.

[0046] Please refer to Figure 1 、 Figure 2 and Figure 3 As shown in, the square pipe buckle 31 is in a U-shape. A fixed column 32 is fixedly connected in the U-shaped groove of the square pipe buckle 31. Fixing holes 11 are formed on the keel frame 1 and are in plug-in fit with the fixed column 32.

[0047] During specific use, by setting the fixed column 32 to limit the square pipe buckle 31, it is possible to prevent the square pipe buckle 31 from sliding up and down on the keel frame 1, facilitating the positioning of the square pipe buckle 31 and improving the stability of the fixation of the square pipe buckle 31.

[0048] An assembly method for an assembled LED display includes the following steps: S1. Install the keel frame 1: Fix the keel frame 1 in a suitable position; S2. Install the fixing module 3: Snap the square pipe buckle 31 onto the corresponding position on the keel frame 1; S3. Install the display module 2: First press the display screen 22 once to make the driving component 24 drive the fixed pin 23 to retract into the interior of the fixed bottom case 21. Then place the fixed bottom case 21 at the corresponding position on the keel frame 1, so that the mounting column 33 on the square pipe buckle 31 is inserted into the corresponding mounting hole 211 on the fixed bottom case 21. After that, press the display screen 22 again to make the fixed pin 23 extend out of the fixed bottom case 21, and let the fixed pin 23 be inserted and locked with the annular groove 34; S4. Repeat step S3 to complete the installation of other display modules 2.

[0049] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A modular LED display comprising a spine frame (1), characterized in that, Also includes: The display module (2) includes several fixed base shells (21) arranged in a matrix on the front side of the keel frame (1). A display screen (22) is movably installed on the front side of the fixed base shell (21). Fixed pins (23) are movably installed on the four sides of the fixed base shell (21). A drive component (24) for driving the fixed pins (23) to move away from the center of the fixed base shell (21) is installed on the fixed base shell (21). A fixed groove (25) for inserting and cooperating with the fixed pins (23) is also provided on the four sides of the fixed base shell (21). A locking component (26) for limiting the movement of the fixed pins (23) away from the center of the fixed base shell (21) is installed on the horizontally arranged fixed base shell (21). A limiting component (27) for locking the fixed pins (23) is also installed on the fixed base shell (21). A matrix of elastic telescopic rods (28) are fixedly connected between the fixed base shell (21) and the display screen (22). The fixing module (3) includes a square tube buckle (31) that is movably installed on the keel frame (1) and located on the left and right sides of the fixed bottom shell (21). The front side of the square tube buckle (31) is fixedly connected to a number of mounting columns (33) distributed in a matrix. The outer ring wall of the mounting column (33) is provided with an annular groove (34). The fixed base shell (21) has a mounting hole (211) for the mounting post (33) to pass through at the corresponding part of the mounting post (33), and the horizontally arranged fixing pin (23) has a limiting groove (231) for the mounting post (33) to pass through. When the fixing pin (23) extends to the outside of the fixed base shell (21), the fixing pin (23) is inserted into the annular groove (34). The drive assembly (24) includes a rotating shaft (241) rotatably mounted at the center of the fixed base (21). A drive gear (242) is rotatably mounted on the front end of the outer ring wall of the rotating shaft (241). A rack is provided on the side of the fixed pin (23) near the drive gear (242), and the rack meshes with the drive gear (242). A threaded post (243) is threadedly connected to the front end of the rotating shaft (241). A movable rod (244) is slidably mounted on the front end of the threaded post (243). The front end of the movable rod (244) is fixedly connected to the rear side of the display screen (22). 2.The assembled LED display of claim 1, wherein: The fixed base shell (21) is rectangular. The end of the fixed pin (23) away from the center of the fixed base shell (21) moves through to the outside of the fixed base shell (21) and is inserted into the fixed groove (25) on the adjacent fixed base shell (21). The length of the horizontally set fixed pin (23) is greater than the length of the vertically set fixed pin (23).

3. The modular LED display according to claim 1, characterized in that: A through hole (232) is further formed in the fixing pin (23), and a first fixing block (245) located inside the through hole (232) is fixedly installed on the fixing bottom shell (21). A first return spring (246) for driving the fixing pin (23) to move away from the center of the fixing bottom shell (21) is fixedly connected between one end of the through hole (232) far from the center of the fixing bottom shell (21) and the first fixing block (245).

4. The modular LED display according to claim 3, characterized in that: The locking component (26) includes a guiding groove (261) formed in the front side of the fixing pin (23). A guiding rod (262) is slidably installed inside the guiding groove (261). A second movable rod (263) is slidably installed on the fixing bottom shell (21) in the front-back direction. A swing arm (264) is rotatably installed at the front end of the second movable rod (263). One end of the swing arm (264) far from the second movable rod (263) is rotatably connected to the guiding rod (262). A telescopic spring (265) is fixedly connected between the fixing bottom shell (21) and the swing arm (264). A long waist hole for the movement of the second movable rod (263) is formed in the fixing pin (23).

5. A modular LED display according to claim 4, characterized in that: The guiding groove (261) includes an entering section (2611), a bending section (2612) and a leaving section (2613). The entering section (2611), the bending section (2612) and the leaving section (2613) are connected end to end to form a closed loop. The entering section (2611), the bending section (2612) and the leaving section (2613) are all slots with a deep starting end and a shallow terminating end. Steps for preventing the guiding rod (262) from moving in the reverse direction are formed at the joints of the entering section (2611), the bending section (2612) and the leaving section (2613).

6. The modular LED display according to claim 1, characterized in that: The limiting component (27) includes a limiting block (271) slidably installed on the front side of the fixing bottom shell (21) in the up-down direction. The limiting block (271) is inserted and matched with the corresponding limiting groove (231). A first wedge-shaped block (272) is fixedly connected to one end of the limiting block (271) far from the corresponding fixing pin (23). A second fixing block (273) located on the side of the first wedge-shaped block (272) far from the limiting block (271) is fixedly connected to the front side of the fixing pin (23). A second return spring (274) is fixedly connected between the second fixing block (273) and the first wedge-shaped block (272). A second wedge-shaped block (275) located on the front side of the first wedge-shaped block (272) is fixedly connected to the rear side of the display screen (22).

7. A modular LED display according to claim 1, characterized in that: The square pipe buckle (31) is in a shape of a capital letter 'J'. A fixing column (32) is fixedly connected in the 'J'-shaped groove of the square pipe buckle (31). A fixing hole (11) inserted and matched with the fixing column (32) is formed on the keel frame (1).

8. A method for assembling a modular LED display, characterized in that, It is completed by using the assembled LED display according to Claim 1, including the following steps: S1. Install the keel frame (1): Fix the keel frame (1) at a suitable position; S2. Install the fixing module (3): Snap the square pipe buckle (31) onto the corresponding position on the keel frame (1); S3. Install the display module (2): First press the display screen (22) once to make the drive component (24) drive the fixing pin (23) to retract into the fixed base shell (21). Then place the fixed base shell (21) on the corresponding position on the keel frame (1) so that the mounting post (33) on the square tube buckle (31) is inserted into the corresponding mounting hole (211) on the fixed base shell (21). Then press the display screen (22) again to make the fixing pin (23) extend out of the fixed base shell (21) so that the fixing pin (23) is inserted into the annular groove (34) and locked together. S4. Repeat step S3 to complete the installation and assembly of the other display modules (2).

Images