A splicing type trolley for transferring LED display screen

Abstract

A kind of pushcart of splicing type transfer LED display screen, for transporting multiple display screen box, the pushcart includes base assembly, upper cover assembly and two side plate assemblies, the base assembly includes load bearing bottom plate, two the side plate assemblies are respectively detachably connected to the left side and right side of the load bearing bottom plate, the upper portion of the load bearing bottom plate is provided with bottom plate lock block, the side plate assembly is provided with lateral lock piece, the upper cover assembly is provided with upper lock piece, the pushcart can be locked and fixed with the display screen box by the bottom plate lock block, lateral lock piece and upper lock piece respectively, the pushcart can be stacked with another pushcart by the upper cover assembly to realize longitudinal splicing, the side of the load bearing bottom plate is also provided with bottom plate bolt, the pushcart can be connected with another pushcart by the bottom plate bolt to realize transverse splicing, this kind of pushcart has the characteristics of multidirectional splicing, transfer splicing box, time-saving and labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of display screen technology, specifically to a trolley for a modular and transportable LED display screen. Background Technology

[0002] With the development of the times, LED displays are widely used in government squares, National Day celebrations, leisure squares, large entertainment squares, bustling commercial centers, advertising information boards, commercial streets, railway stations, waiting rooms, performing arts centers, live television broadcasts, exhibition halls, concert venues and other places.

[0003] Traditional LED display transport trolleys are typically fixed structures, capable of carrying only a fixed number of LED displays at a time, lacking flexibility and resulting in low transport efficiency. While some transport trolleys on the market can achieve single-direction splicing, they cannot achieve multi-direction splicing. Furthermore, traditional LED display transport trolleys usually transport multiple individual LED displays, requiring unloading and reassembly into a combined screen upon arrival at the work site. Pre-assembly into a combined screen within the trolley is not possible, hindering on-site installation efficiency and proving time-consuming and labor-intensive. Therefore, there is an urgent need for a trolley capable of splicing LED displays to solve these problems. Utility Model Content

[0004] In view of this, a trolley for transporting modular LED displays that can be spliced ​​in multiple directions and transported in a modular manner is provided, saving time and effort.

[0005] A trolley for transporting multiple LED display cabinets is disclosed. The trolley includes a base assembly, a top cover assembly, and two side panel assemblies. The base assembly includes a load-bearing base plate. The two side panel assemblies are detachably connected to the left and right sides of the load-bearing base plate, respectively. A base plate locking block is provided on the upper part of the load-bearing base plate. The side panel assemblies are provided with lateral locking components. The top cover assembly is provided with an upper locking component. The trolley can be locked and fixed to the display cabinets by the base plate locking block, lateral locking components, and upper locking components, respectively. The trolley can be stacked with another trolley through the top cover assembly to achieve longitudinal splicing. A base plate pin is also provided on the side of the load-bearing base plate. The trolley can be connected to another trolley through the base plate pin to achieve lateral splicing.

[0006] Furthermore, the side panel assembly includes a side mounting bracket, on which a plurality of lateral pins and the lateral locking member are mounted on the inward side. The lateral locking member includes a flathead lock. Each display screen cabinet has a cabinet side insertion hole on its side. The flathead lock is used to align and lock with the cabinet side insertion hole of one display screen cabinet to lock the side panel assembly to the display screen cabinet. The lateral pins are used to insert into the cabinet side insertion hole of another display screen cabinet to achieve positioning.

[0007] Furthermore, each of the side panel assemblies includes at least two lateral locking members arranged horizontally, and the plurality of display screen housings are arranged along the length direction of the side panel assembly. The two lateral locking members are respectively used to lock the first and last two display screen housings of the plurality of display screen housings, and the middle housing of the plurality of display screen housings is positioned by the lateral pins.

[0008] Furthermore, the side mounting bracket is also equipped with shock-absorbing foam on its inward side. The shock-absorbing foam has multiple slots corresponding to the positions of each display screen housing. The side panel assembly also includes a connecting pipe located at the bottom of the side mounting bracket. The load-bearing base plate has a base plate connection hole, and the connecting pipe is detachably connected to the base plate connection hole. The connecting pipe is used to connect the side mounting bracket and the load-bearing base plate to make the trolley more stable and reliable during transportation.

[0009] Furthermore, the bottom of the display screen cabinet is provided with a cabinet bottom slot and a cabinet bottom pin assembly. There are multiple base plate locking blocks, and the bottom of the multiple base plate locking blocks is connected to the top of the load-bearing base plate. The multiple base plate locking blocks are arranged in two columns, and the arrangement direction of the base plate locking blocks in each column is consistent with the arrangement direction of the multiple display screen cabinets. The two base plate locking blocks in each row are used to be inserted into the cabinet bottom slot of one of the display screen cabinets. The base plate locking block is in the shape of a rectangular frustum, and the top of the base plate locking block has a taper to facilitate insertion into the corresponding cabinet bottom slot. The base plate locking block includes a base plate locking hole, and the base plate locking block is locked and connected to the cabinet bottom pin assembly through the base plate locking hole.

[0010] Furthermore, the upper cover assembly includes a stacking track, and the base assembly includes a base plate stacking frame. The base plate stacking frame is mounted on the lower part of the load-bearing base plate. The length direction of the base plate stacking frame is consistent with the arrangement direction of the plurality of display screen cabinets. The base plate stacking frame includes a stacking frame connecting part and a stacking U-shaped bottom that connects to the stacking frame connecting part. The stacking frame connecting part is provided with a first connecting hole. The stacking frame connecting part is connected to the load-bearing base plate through the first connecting hole. The two ends of the stacking U-shaped bottom are provided with snap-fit ​​blocks on the side away from the load-bearing base plate. The stacking track is provided with snap-fit ​​holes corresponding to the snap-fit ​​blocks. When the trolley is longitudinally stacked and spliced ​​with another trolley through the upper cover assembly, the base plate stacking frame of one trolley is inserted into the stacking track of the other trolley by snapping the snap-fit ​​blocks into the snap-fit ​​holes. The stacking U-shaped bottom is also provided with a first hollow part, a second hollow part, and a third hollow part. The first hollow part, the second hollow part, and the third hollow part are used for weight reduction.

[0011] Furthermore, the stacking track is provided with a first through hole, the bottom of the stacking U-shape is also provided with a second through hole, and the upper cover assembly is also provided with a spring stop pin. The spring stop pin passes through the first through hole and the second through hole in sequence to connect the stacking track to the bottom plate stacking frame to prevent the upper trolley from falling off when the trolleys are stacked.

[0012] Furthermore, the upper cover assembly also includes a connecting strip and an upper mounting bracket. The stacking track is mounted above the upper mounting bracket via the connecting strip. The stacking track has a U-shaped structure, and a second connecting hole is provided at the bottom of the U-shape. The stacking track is connected to the connecting strip through the second connecting hole. The length direction of the stacking track is consistent with the length direction of the base plate stacking frame. The U-shaped width of the stacking track is greater than the U-shaped width at the bottom of the stacking U-shape so that the stacking track can accommodate the base plate stacking frame. The upper mounting bracket includes multiple square through slots and multiple... A square through slot is fixed to the bottom of the connecting strip. Each square through slot is perpendicular to the stacking track. The adjacent spacing of each square through slot corresponds to the adjacent spacing of multiple display screen cabinets. The multiple square through slots are placed on the top of the multiple display screen cabinets. Each display screen cabinet is provided with a cabinet top locking block on its top. The two square through slots located at the beginning and end of the arrangement direction of the multiple square through slots are respectively provided with upper locking members corresponding to the cabinet top locking blocks. The upper locking members are aligned and locked with the cabinet top locking blocks so that the top cover assembly can be locked with the display screen cabinet.

[0013] Furthermore, the side of the display screen cabinet is also provided with a cabinet side lock, and the other side of the same display screen cabinet corresponding to the side is provided with a cabinet side lock seat. The other side of the same load-bearing base plate corresponding to the base plate pin is provided with a base plate insertion hole. When the two trolleys are horizontally spliced, the cabinet side lock of one display screen cabinet is aligned and locked with the cabinet side lock seat of the other display screen cabinet, and the base plate pin of one trolley is inserted into the base plate insertion hole of the other trolley.

[0014] Furthermore, the base assembly also includes casters mounted below the load-bearing base plate, and the upper part of the load-bearing base plate is also provided with wheel wells and support members.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The aforementioned modular LED display trolleys support both horizontal and vertical bidirectional splicing through the engagement of the base plate pins of one trolley with the base plate holes of another trolley, and the engagement of the stacking rails of one trolley with the base plate stacking racks of another trolley. This significantly improves transportation efficiency. Furthermore, the detachable side panel design allows for seamless splicing between multiple trolleys when they are spliced ​​horizontally. Multiple load-bearing base plates can be spliced ​​into a large panel, which can hold pre-assembled splicing cabinets that are secured together by the engagement of the side locking parts of one cabinet with the side locking seat of another cabinet. This improves on-site installation efficiency and saves time and effort. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a trolley for a modular transfer LED display screen according to an embodiment of the present invention.

[0017] Figure 2 yes Figure 1 A magnified view of part A in the diagram.

[0018] Figure 3 yes Figure 1 A magnified view of part B in the diagram.

[0019] Figure 4 This is a three-dimensional structural diagram of a trolley containing a display screen housing, according to an embodiment of the present invention.

[0020] Figure 5 yes Figure 4 A magnified view of part C in the middle.

[0021] Figure 6 yes Figure 4 A magnified view of part D in the middle.

[0022] Figure 7This is an exploded view of the structure of a trolley containing a display screen housing, according to an embodiment of the present invention.

[0023] Figure 8 yes Figure 7 A magnified view of part E in the middle.

[0024] Figure 9 yes Figure 7 A magnified view of part F in the middle section.

[0025] Figure 10 This is a three-dimensional structural diagram of the base plate stacking frame of a trolley for a modular LED display screen according to an embodiment of this utility model.

[0026] Figure 11 This is a three-dimensional structural diagram of the top cover assembly of a trolley for a modular LED display screen according to an embodiment of this utility model.

[0027] Figure 12 This is a three-dimensional structural diagram of a trolley for a modular LED display screen, which is longitudinally spliced ​​with another trolley, according to an embodiment of this utility model.

[0028] Figure 13 This is a three-dimensional structural diagram of a trolley for a modular LED display screen, which is horizontally spliced ​​with another trolley, according to an embodiment of this utility model.

[0029] In the picture, 1. Display cabinet; 2. Load-bearing base plate; 3. Base plate locking block; 4. Side locking component; 5. Upper locking component; 6. Base plate pin; 7. Side mounting bracket; 8. Side pin; 9. Side insertion hole of cabinet; 10. Shock-absorbing foam; 11. Slot; 12. Connecting pipe; 13. Base plate connecting hole; 14. Lower pin assembly of cabinet; 15. Stacking rail; 16. Base plate stacking rack; 17. Spring stop pin; 18. Upper mounting bracket; 19. Top locking block of cabinet; 20. Base plate locking hole; 21. 1. Side lock of the box body; 22. Side lock seat of the box body; 23. Bottom plate insertion hole; 24. Caster wheel; 25. Wheel socket; 26. Support component; 27. Spring; 28. Stacking rack connection part; 29. ​​Stacking U-shaped bottom; 30. First connecting hole; 31. Snap-fit ​​block; 32. Snap-fit ​​hole; 33. First hollow part; 34. Second hollow part; 35. Third hollow part; 36. First through hole; 37. Second through hole; 38. Connecting strip; 39. Second connecting hole; 40. Square through groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1 to 13 This illustration shows a trolley for transporting multiple display screen housings 1, provided by an embodiment of the present invention. The trolley includes a base assembly, a top cover assembly, and two side panel assemblies. The base assembly includes a load-bearing base plate 2. The two side panel assemblies are detachably connected to the left and right sides of the load-bearing base plate 2, respectively. The upper part of the load-bearing base plate 2 is provided with a base plate locking block 3. The side panel assemblies are provided with lateral locking components 4. The top cover assembly is provided with an upper locking component 5. The trolley can be locked and fixed to the display screen housing 1 by the base plate locking block 3, the lateral locking components 4, and the upper locking component 5, respectively. The trolley can be stacked with another trolley through the top cover assembly to achieve longitudinal splicing. The side of the load-bearing base plate 2 is also provided with a base plate pin 6. The trolley can be connected to another trolley through the base plate pin 6 to achieve lateral splicing.

[0032] Specifically, the side panel assembly includes a side mounting bracket 7, on which a plurality of lateral pins 8 and the lateral locking member 4 are mounted on the inward side. The lateral locking member 4 includes a single-pin lock head. Each display screen cabinet 1 has a cabinet side insertion hole 9 on its side. The single-pin lock head is used to align and lock with the cabinet side insertion hole 9 of one display screen cabinet 1 to lock the side panel assembly to the display screen cabinet 1. The lateral pins 8 are used to insert into the cabinet side insertion hole 9 of another display screen cabinet 1 to achieve positioning. In some specific embodiments, the side socket 9 of the cabinet is preferably an elliptical socket. The side lock 4 has two states: unlocked and locked. The side lock 4 also includes a lock knob connected to a flathead lock. When the lock knob is turned, the length direction of the flathead lock is rotated to be consistent with the length direction of the elliptical socket, and the lock can pass through the elliptical socket. At this time, the side lock 4 is in the unlocked state. Pulling the lock knob can separate the side lock 4 from the side of the display cabinet 1. After the lock knob drives the flathead lock through the elliptical socket, the lock knob is rotated again to rotate the length direction of the flathead lock to be perpendicular to the length direction of the elliptical socket. At this time, the flathead lock engages with the elliptical socket and locks the side lock 4 to the side of the display cabinet 1. The side lock 4 is in the locked state.

[0033] More specifically, each of the side panel assemblies includes at least two lateral locking members 4, which are arranged horizontally. The plurality of display screen housings 1 are arranged along the length direction of the side panel assembly. The two lateral locking members 4 are respectively used to lock the first and last two display screen housings 1 of the plurality of display screen housings 1. The middle housing of the plurality of display screen housings 1 is positioned by the lateral pins 8.

[0034] More specifically, the side mounting bracket 7 is also equipped with shock-absorbing foam 10 on its inward side. The shock-absorbing foam 10 has multiple slots 11 corresponding to the positions of each display screen housing 1. The side panel assembly also includes a connecting pipe 12, which is located at the bottom of the side mounting bracket 7. The load-bearing base plate 2 has a base plate connecting hole 13. The connecting pipe 12 is detachably connected to the base plate connecting hole 13. The connecting pipe 12 is used to connect the side mounting bracket 7 and the load-bearing base plate 2 to make the trolley more stable and reliable during transportation.

[0035] Specifically, the bottom of the display screen housing 1 is provided with a bottom slot and a bottom pin assembly 14. There are multiple bottom plate locking blocks 3, and the bottom of the multiple bottom plate locking blocks 3 is connected to the top of the load-bearing base plate 2. The multiple bottom plate locking blocks 3 are arranged in two columns, and the arrangement direction of the bottom plate locking blocks 3 in each column is consistent with the arrangement direction of the multiple display screen housings 1. The two bottom plate locking blocks 3 in each row are used to be inserted into the bottom slot of one display screen housing 1. The bottom plate locking block 3 is in the shape of a rectangular truncated cone, and the top of the bottom plate locking block 3 has a taper to facilitate insertion into the corresponding bottom slot of the housing. The bottom plate locking block 3 includes a bottom plate locking hole 20, and the bottom plate locking block 3 is locked and connected to the bottom pin assembly 14 through the bottom plate locking hole 20.

[0036] In some specific embodiments, the bottom plate locking block 3 and the lower latch assembly 14 of the box body are preferably locked with an eccentric structure. More specifically, the lower latch assembly 14 of the box body includes a locking rod, the bottom plate locking block 3 includes a bottom plate locking hole 20, the locking rod includes a round rod part and a flat head provided at the end of the round rod part, the side of the flat head has a semi-circular surface and an arc surface, the locking rod and the bottom plate locking hole 20 are eccentrically arranged, the axis of the locking rod and the axis of the bottom plate locking hole 20 are parallel and offset, when the locking rod is inserted into the bottom plate locking hole 20, the arc surface of the flat head is clearance-fitted with the bottom plate locking hole 20 so that the flat head can be inserted into the bottom plate locking hole 20, when the locking rod is rotated, the semi-circular surface of the flat head and the bottom plate locking hole 20 are eccentrically frictionally contacted to form a radial interference fit to achieve locking. Alternatively, the locking can be achieved by the side locking member 4 locking with the side insertion hole 9 of the box body or by other means.

[0037] Specifically, the upper cover assembly includes a stacking track 15, and the base assembly includes a base plate stacking frame 16. The base plate stacking frame 16 is mounted on the lower part of the load-bearing base plate 2. The length direction of the base plate stacking frame 16 is consistent with the arrangement direction of the plurality of display screen cabinets 1. The base plate stacking frame 16 includes a stacking frame connecting part 28 and a stacking U-shaped bottom 29 connected to the stacking frame connecting part 28. The stacking frame connecting part 28 is provided with a first connecting hole 30. The stacking frame connecting part 28 is connected to the load-bearing base plate 2 through the first connecting hole 30. The stacking U-shaped bottom 29... The two ends of the stacking rail 15 are provided with snap-fit ​​blocks 31 on the side away from the load-bearing base plate 2. The stacking rail 15 is provided with snap-fit ​​holes 32 corresponding to the snap-fit ​​blocks 31. When the trolley is longitudinally stacked with another trolley through the top cover assembly, the bottom plate stacking frame 16 of one trolley is inserted into the stacking rail 15 of the other trolley by snapping the snap-fit ​​blocks 31 into the snap-fit ​​holes 32. The stacking U-shaped bottom 29 is also provided with a first hollow part 33, a second hollow part 34 and a third hollow part 35. The first hollow part 33, the second hollow part 34 and the third hollow part 35 are used to reduce weight.

[0038] More specifically, the stacking track 15 is provided with a first through hole 36, the stacking U-shaped bottom 29 is also provided with a second through hole 37, and the upper cover assembly is also provided with a spring-loaded stop pin 17. The spring-loaded stop pin 17 passes through the first through hole 36 and the second through hole 37 in sequence to connect the stacking track 15 and the base plate stacking frame 16 to prevent the upper trolley from falling off when the trolleys are stacked. More specifically, the spring-loaded stop pin 17 includes a stop pin body and a spring 27 mounted on one end of the stop pin body. The length direction of the spring 27 is perpendicular to the length direction of the stop pin body. The spring 27 is used to prevent the stop pin from falling off and to enable the stop pin to be detachably connected to the stacking track 15 and the base plate stacking frame 16.

[0039] More specifically, the upper cover assembly also includes a connecting strip 38 and an upper mounting bracket 18. The stacking track 15 is mounted above the upper mounting bracket 18 via the connecting strip 38. The stacking track 15 has a U-shaped structure, and a second connecting hole 39 is provided at the bottom of the U-shape of the stacking track 15. The stacking track 15 is connected to the connecting strip 38 through the second connecting hole 39. The length direction of the stacking track 15 is consistent with the length direction of the bottom plate stacking frame 16. The U-shaped width of the stacking track 15 is greater than the U-shaped width of the bottom 29 of the stacking U-shape so that the stacking track 15 can accommodate the bottom plate stacking frame 16. The upper mounting bracket 18 includes multiple square through slots 4. 0. Multiple square through slots 40 are fixed to the bottom of the connecting strip 38. Each square through slot 40 is perpendicular to the stacking track 15. The adjacent spacing of each square through slot 40 corresponds to the adjacent spacing of multiple display screen cabinets 1. The multiple square through slots 40 are correspondingly placed on the top of multiple display screen cabinets 1. Each display screen cabinet 1 is provided with a cabinet top locking block 19 on its top. The two square through slots 40 located at the first and last ends of the multiple square through slots 40 in the arrangement direction are respectively provided with upper locking members 5 corresponding to the cabinet top locking block 19. The upper locking members 5 are aligned and locked with the cabinet top locking block 19 so that the upper cover assembly can be locked with the display screen cabinet 1.

[0040] In some specific embodiments, when two trolleys are stacked vertically, the upper locking member 5 of the upper cover assembly of one trolley is first locked to the top locking block 19 of the display screen cabinet 1. The upper locking member 5 and the top locking block 19 of the cabinet are preferably locked with an eccentric structure. The eccentric structure is the same as the eccentric locking structure used by the bottom plate locking block 3 and the lower pin assembly 14 of the cabinet mentioned above, which will not be described in detail. After locking, the bottom plate stacking rack 16 of the other trolley is embedded from top to bottom into the stacking track 15 of the current trolley. Finally, it is connected by a spring stop pin 17.

[0041] Specifically, the side of the display screen housing 1 is also provided with a side lock 21, and the other side of the same display screen housing 1 corresponding to the side is provided with a side lock seat 22. The other side of the same load-bearing base plate 2 corresponding to the base plate pin 6 is provided with a base plate insertion hole 23. When the two trolleys are spliced ​​laterally, the side lock 21 of one display screen housing 1 is aligned and locked with the side lock seat 22 of the other display screen housing 1, and the base plate pin 6 of one trolley is inserted into the base plate insertion hole 23 of the other trolley.

[0042] In some specific embodiments, when the two trolleys are spliced ​​laterally, the side panel assemblies on the two opposite sides of the two trolleys are first removed, and then the load-bearing base plates 2 of the two trolleys are seamlessly connected laterally by inserting the bottom plate pin 6 of one trolley into the bottom plate insertion hole 23 of the other trolley. Finally, the lock 21 on the side of the display screen cabinet 1 on one trolley is aligned and locked with the lock seat 22 on the side of the display screen cabinet 1 on the other trolley.

[0043] Specifically, the base assembly also includes casters 24 mounted below the load-bearing base plate 2, and the upper part of the load-bearing base plate 2 is also provided with wheel wells 25 and support members 26. More specifically, the casters 24 are used to enable flexible movement of the trolleys. When multiple trolleys need to be disassembled and stored, multiple disassembled base assemblies can be stacked together by embedding the casters 24 of another base assembly into the wheel wells 25 of one base assembly. The support members 26 are used to support the display screen housing 1.

[0044] In summary, this type of modular LED display trolley supports both horizontal and vertical bidirectional splicing through the cooperation of the base plate pin 6 of one trolley with the base plate insertion hole 23 of another trolley, and the cooperation of the stacking rail 15 of one trolley with the base plate stacking rack 16 of another trolley. This significantly improves transportation efficiency. Furthermore, the detachable side panel assembly design allows for seamless splicing between multiple trolleys when spliced ​​horizontally. Multiple load-bearing base plates 2 can be spliced ​​into a seamless large panel, which can hold the pre-assembled splicing cabinets that are secured together by the cooperation of the side locking piece 21 of the cabinet with the side locking seat 22 of another cabinet. This improves on-site installation efficiency and saves time and effort. In addition, the side locking piece 4, the upper locking piece 5, and the base plate locking block 3 are locked and fixed to the display cabinet 1 respectively, ensuring that the cabinet is firmly fixed during transportation and reducing the risk of shaking and collision. The use of shock-absorbing foam 10 further enhances the protective effect.

[0045] It should be noted that this utility model is not limited to the above-described embodiments. Based on the inventive spirit of this utility model, those skilled in the art can make other changes, and these changes made based on the inventive spirit of this utility model should be included within the scope of protection claimed by this utility model.

Claims

1. A trolley for transporting modular LED display screens, used to transport multiple display screen housings, characterized in that, The trolley includes a base assembly, a top cover assembly, and two side panel assemblies. The base assembly includes a load-bearing base plate. The two side panel assemblies are detachably connected to the left and right sides of the load-bearing base plate, respectively. The upper part of the load-bearing base plate is provided with a base plate locking block. The side panel assemblies are provided with lateral locking components. The top cover assembly is provided with an upper locking component. The trolley can be locked and fixed to the display screen housing by the base plate locking block, the lateral locking components, and the upper locking components, respectively. The trolley can be stacked with another trolley through the top cover assembly to achieve longitudinal splicing. The side of the load-bearing base plate is also provided with a base plate pin. The trolley can be connected to another trolley through the base plate pin to achieve lateral splicing.

2. The trolley for a modular LED display screen as described in claim 1, characterized in that, The side panel assembly includes a side mounting bracket, on the inward side of which are mounted a plurality of lateral pins and a lateral locking member. The lateral locking member includes a single-pin lock head. Each display screen cabinet has a cabinet side insertion hole on its side. The single-pin lock head is used to align and lock with the cabinet side insertion hole of one display screen cabinet to lock the side panel assembly to the display screen cabinet. The lateral pins are used to insert into the cabinet side insertion hole of another display screen cabinet to achieve positioning.

3. The trolley for a modular LED display screen as described in claim 2, characterized in that, Each of the side panel assemblies includes at least two lateral locking members arranged horizontally. The plurality of display screen housings are arranged along the length of the side panel assembly. The two lateral locking members are respectively used to lock the first and last two display screen housings of the plurality of display screen housings. The middle housing of the plurality of display screen housings is positioned by the lateral pin.

4. The trolley for a modular LED display screen as described in claim 2, characterized in that, The side mounting bracket is also equipped with shock-absorbing foam on its inward side. The shock-absorbing foam has multiple slots corresponding to the positions of each display screen cabinet. The side panel assembly also includes a connecting pipe located at the bottom of the side mounting bracket. The load-bearing base plate has a base plate connection hole. The connecting pipe is detachably connected to the base plate connection hole. The connecting pipe is used to connect the side mounting bracket and the load-bearing base plate to make the trolley more stable and reliable during transportation.

5. The trolley for a modular LED display screen as described in claim 1, characterized in that, The bottom of the display screen cabinet is provided with a cabinet bottom slot and a cabinet bottom pin assembly. There are multiple base plate locking blocks, and the bottom of the multiple base plate locking blocks are connected to the top of the load-bearing base plate. The multiple base plate locking blocks are arranged in two columns, and the arrangement direction of the base plate locking blocks in each column is consistent with the arrangement direction of the multiple display screen cabinets. The two base plate locking blocks in each row are used to be inserted into the cabinet bottom slot of one of the display screen cabinets. The base plate locking block is in the shape of a rectangular frustum, and the top of the base plate locking block has a taper to facilitate insertion into the corresponding cabinet bottom slot. The base plate locking block includes a base plate locking hole, and the base plate locking block is locked and connected to the cabinet bottom pin assembly through the base plate locking hole.

6. The trolley for a modular, transferable LED display screen as described in claim 1, characterized in that, The top cover assembly includes a stacking track, and the base assembly includes a base plate stacking frame. The base plate stacking frame is mounted on the lower part of the load-bearing base plate. The length direction of the base plate stacking frame is consistent with the arrangement direction of the multiple display screen cabinets. The base plate stacking frame includes a stacking frame connecting part and a stacking U-shaped bottom that connects to the stacking frame connecting part. The stacking frame connecting part is provided with a first connecting hole. The stacking frame connecting part is connected to the load-bearing base plate through the first connecting hole. The two ends of the stacking U-shaped bottom are provided with snap-fit ​​blocks on the side away from the load-bearing base plate. The stacking track is provided with snap-fit ​​holes corresponding to the snap-fit ​​blocks. When the trolley is longitudinally stacked and spliced ​​with another trolley through the top cover assembly, the base plate stacking frame of one trolley is inserted into the stacking track of the other trolley by snapping the snap-fit ​​blocks and snap-fit ​​holes. The stacking U-shaped bottom is also provided with a first hollow part, a second hollow part, and a third hollow part. The first hollow part, the second hollow part, and the third hollow part are used for weight reduction.

7. The trolley for a modular LED display screen as described in claim 6, characterized in that, The stacking track is provided with a first through hole, and the bottom of the stacking U-shape is also provided with a second through hole. The upper cover assembly is also provided with a spring stop pin. The spring stop pin passes through the first through hole and the second through hole in sequence to connect the stacking track with the base plate stacking frame to prevent the upper trolley from falling off when the trolleys are stacked.

8. The trolley for a modular LED display screen as described in claim 6, characterized in that, The upper cover assembly also includes a connecting strip and an upper mounting bracket. The stacking track is mounted above the upper mounting bracket via the connecting strip. The stacking track has a U-shaped structure, and a second connecting hole is provided at the bottom of the U-shape. The stacking track is connected to the connecting strip through the second connecting hole. The length direction of the stacking track is consistent with the length direction of the base plate stacking frame. The width of the U-shape of the stacking track is greater than the width of the bottom of the stacking U-shape so that the stacking track can accommodate the base plate stacking frame. The upper mounting bracket includes multiple square through slots. The slot is fixed to the bottom of the connecting strip. Each square through slot is perpendicular to the stacking track. The adjacent spacing of each square through slot corresponds to the adjacent spacing of multiple display screen cabinets. The multiple square through slots are placed on the top of the multiple display screen cabinets. Each display screen cabinet is provided with a cabinet top locking block on its top. The two square through slots located at the beginning and end of the arrangement direction of the multiple square through slots are respectively provided with upper locking members corresponding to the cabinet top locking blocks. The upper locking members are aligned and locked with the cabinet top locking blocks so that the top cover assembly can be locked with the display screen cabinet.

9. The trolley for a modular, transferable LED display screen as described in claim 1, characterized in that, The side of the display screen cabinet is also provided with a cabinet side lock. The other side of the same display screen cabinet corresponding to the side is provided with a cabinet side lock seat. The other side of the same load-bearing base plate corresponding to the base plate pin is provided with a base plate insertion hole. When the two trolleys are spliced ​​laterally, the cabinet side lock of one display screen cabinet is aligned and locked with the cabinet side lock seat of the other display screen cabinet, and the base plate pin of one trolley is inserted into the base plate insertion hole of the other trolley.

10. The trolley for a modular, transferable LED display screen as described in claim 1, characterized in that, The base assembly also includes casters mounted below the load-bearing base plate, and the upper part of the load-bearing base plate is provided with wheel wells and support components.

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