Connecting device of LED display screen unit box body

Abstract

The invention relates to a connecting device of an LED display screen unit box, which comprises a shell, a first connecting device and a second connecting device, and the first connecting device and the second connecting device are both partially arranged in the shell in a sliding manner. The first connecting device moves in the first direction, the second connecting device moves in the second direction, and the first direction is perpendicular to the second direction. The first connecting device can be switched between a first state and a second state, the first connecting device is connected with the top corners of the four adjacent LED display screen unit box bodies in a clamped mode in the first state, and the first connecting device is separated from the top corners of the four adjacent LED display screen unit box bodies in the second state. The second connecting device can be switched between a third state and a fourth state, the second device locks the current position of the first device in the third state, and the second device unlocks the current position of the first device in the fourth state. And the first connecting device and the second connecting device can be driven without the aid of tools, so that the disassembly and assembly convenience is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of LED display screens, and in particular to a connecting device for a unit box of an LED display screen. Background Art

[0002] LED display screens are generally assembled from modular LED display screen unit boxes. When installing multiple LED display screen unit boxes, all LED display screen unit boxes can be installed on a steel structure frame or the top LED display screen unit box can be hoisted on a hanging beam. After installing the LED display screen unit box, it is necessary to connect the adjacent LED display screen unit boxes so that multiple LED display screen unit boxes can be stably connected into a whole LED display screen to improve the stability of the installation. For example, the four adjacent top corners of four adjacent LED display screen unit boxes will be connected and locked through a linking device. When locking, a connecting plate is pressed against the four adjacent top corners, and the connecting plate and the top corners are connected by bolts, which is not convenient for disassembly and assembly. In addition, for outdoor LED display screen unit boxes that often need to be disassembled and assembled, this connection method is prone to thread damage, metal fatigue, thread deformation, and slippage failures caused by frequent bolting, and there is a risk of loose connection and locking between the connecting plate and the top corners. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a connecting device for a LED display screen unit box.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned object, the connection device of the LED display unit box of the present invention comprises a shell, a first connection device and a second connection device; the first connection device and the second connection device are both partially slidably arranged in the shell, and the first connection device is connected to the second connection device;

[0007] The first connecting device moves in a first direction, and the second connecting device moves in a second direction, and the first direction is perpendicular to the second direction;

[0008] The first connecting device can be switched between a first state and a second state. In the first state, the first connecting device is engaged with the top corners of four adjacent LED display unit boxes. In the second state, the first connecting device is separated from the top corners of four adjacent LED display unit boxes.

[0009] The second connecting device can switch between a third state and a fourth state. In the third state, the second device locks the current position of the first device. In the fourth state, the second device unlocks the current position of the first device.

[0010] Optionally, the first connecting device comprises a first clamping plate and a second clamping plate which are arranged opposite to each other, and the first clamping plate and the second clamping plate are both partially slidably arranged in the housing;

[0011] The first clamping plate is provided with a first clamping portion and a second clamping portion, and the second clamping plate is provided with a third clamping portion and a fourth clamping portion;

[0012] In the first state, the first clamping portion and the second clamping portion are respectively clamped with two of the four adjacent LED display unit boxes located on one side, and the third clamping portion and the fourth clamping portion are respectively clamped with two of the four adjacent LED display unit boxes located on the other side.

[0013] Optionally, a connecting column is provided at the top corner of each LED display unit box, and an annular protrusion is provided at the end of the connecting column;

[0014] The first clamping portion, the second clamping portion, the third clamping portion and the fourth clamping portion all include gourd holes, and the housing is provided with four through holes;

[0015] In the first state, the connecting column passes through the through hole and is sleeved in the small hole of the gourd hole. In the second state, the connecting column passes through the through hole and is sleeved in the large hole of the gourd hole, wherein the diameter of the connecting column is smaller than the inner diameter of the small hole of the gourd hole, and the diameter of the annular protrusion is between the inner diameters of the small hole and the large hole of the gourd hole.

[0016] Optionally, the first connecting device further comprises a first elastic member, and the second connecting device further comprises a second elastic member;

[0017] The portion of the first clamping plate located in the shell is connected to the shell via the first elastic member, the portion of the first clamping plate located in the shell is connected to the shell via the first elastic member, the force exerted by the first elastic member on the first clamping plate is opposite to the force exerted by the second elastic member on the second clamping plate, and the small holes of the gourd holes on the first clamping plate and the second clamping plate are close to each other;

[0018] In the first state, the first clamping plate and the second clamping plate are moved away from each other by elastic force, and the connecting column is sleeved in the small hole of the gourd hole;

[0019] In the second state, the first elastic member and the second elastic member are compressed, the first clamping plate and the second clamping plate are close to each other, and the connecting column is sleeved in the large hole of the gourd hole.

[0020] Optionally, the first elastic member and the second elastic member are both U-shaped elastic sheets.

[0021] Optionally, a first strip-shaped hole is formed on a set of opposite side edges of the shell;

[0022] The first clamping plate and the second clamping plate are respectively slidably sleeved in the strip-shaped holes on the corresponding side edges, and the parts of the first clamping plate and the second clamping plate located outside the shell are bent to form pressure plates.

[0023] Optionally, the second connecting device comprises a first locking mechanism and a second locking mechanism, and the first locking mechanism and the second locking mechanism both comprise a locking pin and a handle;

[0024] The locking pin is partially slidably sleeved in the housing, the end of the locking pin located outside the housing is the first end, and the first end of the locking pin is hinged to the handle;

[0025] The first clamping plate and the second clamping plate are both provided with a second strip hole in the same sliding direction as the first clamping plate, the second end of the locking pin of the first locking mechanism is slidably connected to the second strip hole of the first clamping plate, and the second end of the locking pin of the second locking mechanism is slidably connected to the second strip hole of the second clamping plate;

[0026] The handle abuts against the housing during rotation, thereby driving the locking pin to move in its own axial direction.

[0027] Optionally, a limit assembly is provided on the handle, the limit assembly comprises a pressing block, a connecting plate and a limit plate, the middle portion of the connecting plate is rotatably connected to the handle, and a torsion spring is provided on the rotating shaft of the limit plate;

[0028] The pressing block is connected to the first end of the connecting plate, and the limiting plate is connected to the second end of the connecting plate;

[0029] A clamping groove is provided on the top of the connecting column, and when the handle is rotated to a set angle, the limiting plate is clamped in the limiting groove.

[0030] Optionally, the connecting device also includes two pairs of elastic columns, the first ends of the elastic columns are connected to the inner wall of the shell, the second ends of one pair of the elastic columns abut against the first clip-on plate, and the second ends of the other pair of the elastic columns abut against the second clip-on plate, for driving the first clip-on plate and the second clip-on plate to reset.

[0031] Optionally, the elastic column includes a sleeve, a spring and a ball, the first end of the sleeve is connected to the inner wall of the shell, and the spring is arranged in the sleeve;

[0032] The diameter of the ball is smaller than the inner diameter of the sleeve. The ball is partially arranged in the sleeve. The part located in the sleeve abuts against the spring, and the part located outside the sleeve abuts against the corresponding clamping plate.

[0033] (III) Beneficial effects

[0034] The first connecting device can be switched between a first state and a second state under human drive. After the first connecting device is installed on the back of the display screen unit box, it is in the first state. The first connecting device is engaged with the top corners of four adjacent LED display screen unit boxes. At this time, the first connecting device is used to lock the top corners of the four adjacent LED display screen unit boxes together, thereby stabilizing the installation of the four adjacent LED display screen unit boxes. In the second state, the first connecting device is separated from the top corners of the four adjacent LED display screen unit boxes. At this time, it can be used to disassemble the first connecting device, and then the LED display screen unit box can be disassembled, which is convenient for disassembly and assembly. The second connecting device can be switched between the third state and the fourth state under human drive: when the first connecting device is in the first state, the second connecting device is manually switched to the third state, at which time the second device locks the current position of the first device to prevent the first device from being separated from the top corners of the four adjacent LED display unit boxes, thereby improving the stability of the installation; when the first connecting device needs to be disassembled, the second connecting device is manually switched to the fourth state, and the second device unlocks the current position of the first device, thereby switching the first connecting device to the second state, thereby realizing the disassembly of the first connecting device, which is convenient for disassembly and assembly, and the double locking effectively increases the stability of the LED display unit box installation. In addition, the use of the double-locked first connecting device and the second connecting device instead of the existing bolts solves the various disadvantages of bolt fixing and improves the durability of the LED display unit box. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a front view schematic diagram of the connection device of the LED display unit box of the present invention;

[0036] Figure 2 It is a rear view schematic diagram of the connection device of the LED display unit box of the present invention;

[0037] Figure 3 It is a stereoscopic schematic diagram of the first viewing angle of the connection device of the LED display unit box of the present invention;

[0038] Figure 4A second perspective perspective schematic diagram of the connection device of the LED display unit box of the present invention;

[0039] Figure 5 It is a side view schematic diagram of the connection device of the LED display unit box of the present invention;

[0040] Figure 6 It is a structural schematic diagram of a first connecting device of a connecting device of an LED display unit box of the present invention;

[0041] Figure 7 It is a schematic diagram of the installation of the first connecting device of the connecting device of the LED display unit box of the present invention;

[0042] Figure 8 It is a structural schematic diagram of the second connecting device of the connecting device of the LED display unit box of the present invention.

[0043] [Description of Reference Numerals]

[0044] 100: housing; 101: through hole; 102: first strip hole; 200: connecting column; 201: annular protrusion;

[0045] 1: first connecting device; 11: first clamping plate; 111: first clamping portion; 112: second clamping portion; 113: gourd hole; 114: second strip hole; 12: second clamping plate; 121: third clamping portion; 122: fourth clamping portion;

[0046] 2: second connecting device; 21: locking pin; 211: slot; 22: handle; 23: limit assembly; 231: pressure plate; 232: connecting plate; 233: limit plate;

[0047] 31: first elastic member; 32: second elastic member;

[0048] 4: Elastic column. DETAILED DESCRIPTION

[0049] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. Figure 1 The orientation is used as a reference.

[0050] Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0051] like Figures 1 to 5As shown, the present invention provides a connection device for a LED display unit box, the connection device includes a housing 100, a first connection device 1 and a second connection device 2. The first connection device 1 and the second connection device 2 are both partially slidably disposed in the housing 100, and the first connection device 1 is connected to the second connection device 2. The first connection device 1 moves in a first direction, and the second connection device 2 moves in a second direction, and the first direction and the second direction are perpendicular to each other. Figure 1 , the first direction is a direction parallel to the shell 100, the second direction is a direction perpendicular to the shell 100, and the first direction and the second direction are perpendicular to each other. The first connecting device 1 and the second connecting device 2 are manually driven without the aid of tools. The first connecting device 1 can switch between the first state and the second state under human drive: the first connecting device 1 is in the first state after being installed on the back of the display unit box, and the first connecting device 1 is engaged with the top corners of four adjacent LED display unit boxes. At this time, the first connecting device 1 is used to lock the top corners of the four adjacent LED display unit boxes together, which plays a role in stabilizing the installation of the four adjacent LED display unit boxes; in the second state, the first connecting device 1 is separated from the top corners of the four adjacent LED display unit boxes, which can be used for the disassembly of the first connecting device 1, and then the LED display unit box can be disassembled, which is convenient for disassembly and assembly. The second connecting device 2 can be switched between the third state and the fourth state under human drive: when the first connecting device 1 is in the first state, the second connecting device 2 is manually switched to the third state, at which time the second device locks the current position of the first device to prevent the first device from being separated from the top corners of the four adjacent LED display unit boxes, thereby improving the stability of the installation; when the first connecting device 1 needs to be disassembled, the second connecting device 2 is manually switched to the fourth state, and the second device can only switch the first connecting device 1 to the second state after unlocking the current position of the first device, thereby realizing the disassembly of the first connecting device 1, which is convenient for disassembly and assembly, and the double locking effectively increases the stability of the installation of the LED display unit box. In addition, the use of the double-locked first connecting device 1 and the second connecting device 2 instead of the existing bolts solves the various disadvantages of bolt fixing and improves the durability of the LED display unit box.

[0052] Further, the first connecting device 1 includes a first clamping plate 11 and a second clamping plate 12 which are arranged opposite to each other, and the first clamping plate 11 and the second clamping plate 12 are both partially slidably arranged in the housing 100. The first clamping portion 111 and the second clamping portion 112 are symmetrically installed in the portion of the first clamping plate 11 located in the housing 100, and the third clamping portion 121 and the fourth clamping portion 122 are symmetrically installed in the portion of the second clamping plate 12 located in the housing 100. In the first state, the first clamping portion 111 and the second clamping portion 112 are respectively clamped with the two vertex corners located on one side of the four adjacent LED display unit boxes, and the third clamping portion 121 and the fourth clamping portion 122 are respectively clamped with the two vertex corners located on the other side of the four adjacent LED display unit boxes.

[0053] See also Figure 6 and Figure 7 , the LED display unit box is not shown in the figure. The LED display unit box is a rectangular plate structure. After the top feet of the LED display unit box are closely spliced, the joint is in a "cross" shape. The back of each LED display unit box is provided with a connecting column 200 perpendicular to the LED display unit box at the four top corners. The first end of the connecting column 200 is connected to the LED display unit box. The second end of the connecting column 200 is provided with an annular protrusion 201, and the annular protrusion 201 is preferably an arc-shaped protrusion. The first clamping part 111, the second clamping part 112, the third clamping part 121 and the fourth clamping part 122 all include a gourd hole 113. The diameter of the connecting column 200 is smaller than the inner diameter of the small hole of the gourd hole 113, and the diameter of the annular protrusion 201 is between the inner diameter of the small hole and the large hole of the gourd hole 113. Four through holes 101 are opened on the housing 100 at positions corresponding to the four gourd holes 113, which are used for the connecting column 200 to pass through the housing 100 and connect to the corresponding gourd hole 113. Before installing the connection device, the first clamping plate 11 and the second clamping plate 12 are adjusted to the second state, at which time the large hole of the gourd hole 113 is coaxial with the through hole 101, and the annular protrusion 201 of the connection column 200 passes through the through hole 101 on the housing 100 and the large hole of the gourd hole 113 in sequence. At this time, the first clamping plate 11 and the second clamping plate 12 are driven to move to the first state, at which time the connection column 200 is sleeved in the small hole of the gourd hole 113, and the annular protrusion 201 abuts against the clamping portion to prevent the connection column 200 from being pulled out of the gourd hole 113. When disassembling, the first clamping plate 11 and the second clamping plate 12 of the first connection device 1 are driven to move to the second state, and the connection column 200 passes through the through hole 101 and is sleeved in the large hole of the gourd hole 113. At this time, the connection column 200 can be pulled out of the gourd hole 113, thereby removing the connection device.

[0054] See also Figure 6 and Figure 7, the first connection device 1 further includes a first elastic member 31, and the second connection device 2 further includes a second elastic member 32. The first elastic member 31 is used to reset the first clip plate 11, and the second elastic member 32 is used to reset the second clip plate 12. Specifically, the portion of the first clip plate 11 located inside the housing 100 is connected to the housing 100 via the first elastic member 31, and the portion of the first clip plate 11 located inside the housing 100 is connected to the housing 100 via the first elastic member 31. The force exerted by the first elastic member 31 on the first clip plate 11 is opposite to the force exerted by the second elastic member 32 on the second clip plate 12. The small holes of the gourd holes 113 on the first clip plate 11 and the second clip plate 12 are close to each other, see Figure 7 , the small hole of the gourd hole 113 is located in the middle, and the large hole of the gourd hole 113 is located outside the small hole. The force of the first elastic member 31 acting on the first clamping plate 11 drives it to move to the right, and the force of the second elastic member 32 acting on the second clamping plate 12 drives it to move to the left. In the first state, the first clamping plate 11 and the second clamping plate 12 are separated from each other by the elastic force, and the connecting column 200 is sleeved in the small hole of the gourd hole 113 to clamp the corresponding connecting column 200 to prevent the connecting column 200 from being pulled out of the gourd hole 113; in the second state, the first elastic member 31 and the second elastic member 32 are manually compressed, the first clamping plate 11 and the second clamping plate 12 are close to each other, and the connecting column 200 is sleeved in the large hole of the gourd hole 113. At this time, the connecting column 200 can be pulled out of the gourd hole 113, which is convenient for the disassembly and assembly of the connecting device. When installing the connecting device, first manually compress the first elastic member 31 and the second elastic member 32 through the first clamping plate 11 and the second clamping plate 12, so that the first clamping plate 11 and the second clamping plate 12 are close to each other, and the large hole of the gourd hole 113 is coaxial with the corresponding through hole 101 on the shell 100; then, the annular protrusion 201 of the connecting column 200 is passed through the through hole 101 and the large hole of the gourd hole 113, and the connecting device is sleeved on the four connecting columns 200, and the force acting on the first clamping plate 11 and the second clamping plate 12 is removed. The first clamping plate 11 and the second clamping plate 12 are reset under the action of elastic force, and the first clamping plate 11 and the second clamping plate 12 are away from each other, the small hole of the gourd hole 113 is coaxial with the corresponding through hole 101, and the annular protrusion 201 abuts against the corresponding clamping part, and the installation of the connecting device is completed.

[0055] Preferably, see Figure 7 The first elastic member 31 and the second elastic member 32 are both U-shaped spring pieces, both ends of the U-shaped spring piece are connected to the same clamping plate, and the bent portion of the U-shaped spring piece is installed on a mounting position set inside the shell 100.

[0056] like Figures 1 to 5As shown, a first strip hole 102 is opened on a group of opposite sides of the shell 100, and the first clip plate 11 and the second clip plate 12 are respectively slidably mounted in the strip holes on the corresponding sides, and the parts of the first clip plate 11 and the second clip plate 12 located outside the shell 100 are bent into a pressure plate 231, which is convenient for the user to press and drive the first clip plate 11 and the second clip plate 12 to move closer to each other.

[0057] like Figures 4 to 6 As shown, the second connection device 2 includes a first locking mechanism and a second locking mechanism, and the first locking mechanism and the second locking mechanism both include a locking pin 21 and a handle 22. Part of the locking pin 21 is slidably sleeved in the housing 100, and the end of the locking pin 21 located outside the housing 100 is the first end, and the first end of the locking pin 21 is hinged to the handle 22. The first clip plate 11 and the second clip plate 12 are both provided with a second strip hole 114 in the same sliding direction as themselves, and the second end of the locking pin 21 of the first locking mechanism is slidably connected to the second strip hole 114 on the first clip plate 11, and the second end of the locking pin 21 of the second locking mechanism is slidably connected to the second strip hole 114 on the second clip plate 12, and the locking pin 21 can only move relative to the clip plate in the length direction of the second strip hole 114. The handle 22 is of a conventional structure, which abuts against the shell 100 during rotation, thereby driving the locking pin 21 to move in its own axial direction, and then driving the first clamping plate 11 and the second clamping plate 12 to move synchronously along the axial direction of the locking pin 21 through the locking pin 21, so that the four clamping parts are respectively pressed against the corresponding annular protrusions 201 of the connecting column 200. The friction force between the annular protrusion 201 and the corresponding clamping part can avoid the situation where the first clamping plate 11 and the second clamping plate 12 are close to each other due to misoperation to a certain extent.

[0058] like Figure 6 and Figure 8 As shown, the handle 22 is provided with a limit assembly 23, which includes a pressure block, a connecting plate 232 and a limit plate 233. The middle part of the connecting plate 232 is rotatably connected to the handle 22, and a torsion spring is provided on the rotating shaft of the limit plate 233. The pressure block is connected to the first end of the connecting plate 232, and the limit plate 233 is connected to the second end of the connecting plate 232. A card slot 211 is provided on the top of the connecting column 200. When the handle 22 rotates, the locking pin 21 is driven to move in a direction away from the housing 100. After rotating to a set angle, the four clamping parts are respectively pressed against the corresponding annular protrusions 201 of the connecting column 200. The positions of the first clamping plate 11 and the second clamping plate 12 are locked by the cooperation of the locking pin 21 and the connecting column 200. At this time, the limit plate 233 is clamped in the limit slot to prevent the limit assembly 23 from resetting and maintain the locked state.

[0059] like Figure 6 and Figure 7As shown, the connection device also includes two pairs of elastic columns 4, the first ends of the elastic columns 4 are connected to the inner wall of the housing 100, the second ends of one pair of elastic columns 4 abut against the first clamping plate 11, and the second ends of the other pair of elastic columns 4 abut against the second clamping plate 12. When the handle 22 releases the first clamping plate 11 and the second clamping plate 12, the first clamping plate 11 and the second clamping plate 12 are driven to reset by the two pairs of elastic columns 4. Specifically, the elastic column 4 includes a sleeve, a spring and a ball, the first end of the sleeve is connected to the inner wall of the housing 100, and the spring is arranged at the second end of the sleeve. The diameter of the ball is smaller than the inner diameter of the sleeve, and the ball part is arranged in the sleeve, the part located in the sleeve abuts against the spring, and the part located outside the sleeve abuts against the corresponding clamping plate.

[0060] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0063] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A connection device for a LED display unit box, characterized in that: The connecting device comprises a housing (100), a first connecting device (1) and a second connecting device (2); the first connecting device (1) and the second connecting device (2) are both partially slidably disposed in the housing (100), and the first connecting device (1) is connected to the second connecting device (2); The first connecting device (1) moves in a first direction, and the second connecting device (2) moves in a second direction, and the first direction is perpendicular to the second direction; The first connecting device (1) can be switched between a first state and a second state. In the first state, the first connecting device (1) is engaged with the top corners of four adjacent LED display unit boxes. In the second state, the first connecting device (1) is separated from the top corners of the four adjacent LED display unit boxes. The second connecting device (2) can be switched between a third state and a fourth state. In the third state, the second device locks the current position of the first device. In the fourth state, the second device unlocks the current position of the first device.

2. The connecting device of the LED display unit box according to claim 1, characterized in that: The first connecting device (1) comprises a first clamping plate (11) and a second clamping plate (12) which are arranged opposite to each other, and the first clamping plate (11) and the second clamping plate (12) are both partially slidably arranged in the housing (100); The first clamping plate (11) is provided with a first clamping portion (111) and a second clamping portion (112), and the second clamping plate (12) is provided with a third clamping portion (121) and a fourth clamping portion (122); In the first state, the first clamping portion (111) and the second clamping portion (112) are respectively clamped with two of the four adjacent LED display screen unit boxes located on one side in a one-to-one correspondence, and the third clamping portion (121) and the fourth clamping portion (122) are respectively clamped with two of the four adjacent LED display screen unit boxes located on the other side in a one-to-one correspondence.

3. The connecting device of the LED display unit box according to claim 2, characterized in that: A connecting column (200) is provided at the top corner of each LED display unit box, and an annular protrusion (201) is provided at the end of the connecting column (200); The first clamping portion (111), the second clamping portion (112), the third clamping portion (121) and the fourth clamping portion (122) all include a gourd hole (113), and the housing (100) is provided with four through holes (101); In the first state, the connecting column (200) passes through the through hole (101) and is sleeved in the small hole of the gourd hole (113); in the second state, the connecting column (200) passes through the through hole (101) and is sleeved in the large hole of the gourd hole (113), wherein the diameter of the connecting column (200) is smaller than the inner diameter of the small hole of the gourd hole (113), and the diameter of the annular protrusion (201) is between the inner diameters of the small hole and the large hole of the gourd hole (113).

4. The connecting device of the LED display unit box according to claim 3, characterized in that: The first connecting device (1) further comprises a first elastic member (31), and the second connecting device (2) further comprises a second elastic member (32); The portion of the first clamping plate (11) located inside the shell (100) is connected to the shell (100) via the first elastic member (31); the portion of the first clamping plate (11) located inside the shell (100) is connected to the shell (100) via the first elastic member (31); the force exerted by the first elastic member (31) on the first clamping plate (11) is in the opposite direction to the force exerted by the second elastic member (32) on the second clamping plate (12); the small holes of the gourd hole (113) on the first clamping plate (11) and the second clamping plate (12) are close to each other; In the first state, the first clamping plate (11) and the second clamping plate (12) are moved away from each other by elastic force, and the connecting column (200) is sleeved in the small hole of the gourd hole (113); In the second state, the first elastic member (31) and the second elastic member (32) are compressed, the first clamping plate (11) and the second clamping plate (12) are close to each other, and the connecting column (200) is sleeved in the large hole of the gourd hole (113).

5. The connecting device of the LED display unit box according to claim 4, characterized in that: The first elastic member (31) and the second elastic member (32) are both U-shaped elastic sheets.

6. The connecting device of the LED display unit box according to claim 2, characterized in that: A first strip-shaped hole (102) is formed on a set of opposite side edges of the housing (100); The first clamping plate (11) and the second clamping plate (12) are respectively slidably mounted in the strip-shaped holes on the corresponding side edges, and the parts of the first clamping plate (11) and the second clamping plate (12) located outside the shell (100) are bent to form a pressure plate (231).

7. The connecting device of the LED display unit box according to claim 3, characterized in that: The second connecting device (2) comprises a first locking mechanism and a second locking mechanism, and the first locking mechanism and the second locking mechanism both comprise a locking pin (21) and a handle (22); The locking pin (21) is partially slidably sleeved in the housing (100), the end of the locking pin (21) located outside the housing (100) is a first end, and the first end of the locking pin (21) is hinged to the handle (22); The first clamping plate (11) and the second clamping plate (12) are both provided with a second strip hole (114) in the same sliding direction as the first clamping plate (11), the second end of the locking pin (21) of the first locking mechanism is slidably connected to the second strip hole (114) on the first clamping plate (11), and the second end of the locking pin (21) of the second locking mechanism is slidably connected to the second strip hole (114) on the second clamping plate (12); During the rotation of the handle (22), it abuts against the housing (100), thereby driving the locking pin (21) to move in its own axial direction.

8. The connecting device of the LED display unit box according to claim 7, characterized in that: A limit assembly (23) is provided on the handle (22), and the limit assembly (23) comprises a pressure block, a connecting plate (232) and a limit plate (233), the middle portion of the connecting plate (232) is rotatably connected to the handle (22), and a torsion spring is provided on the rotating shaft of the limit plate (233); The pressing block is connected to a first end of the connecting plate (232), and the limiting plate (233) is connected to a second end of the connecting plate (232); A clamping groove (211) is provided on the top of the connecting column (200), and when the handle (22) is rotated to a set angle, the limiting plate (233) is clamped in the limiting groove.

9. The LED display unit box connection device according to claim 2, characterized in that: The connecting device further comprises two pairs of elastic columns (4), the first ends of the elastic columns (4) being connected to the inner wall of the housing (100), the second ends of one pair of the elastic columns (4) being in contact with the first clamping plate (11), and the second ends of the other pair of the elastic columns (4) being in contact with the second clamping plate (12), for driving the first clamping plate (11) and the second clamping plate (12) to reset.

10. The LED display unit box connection device according to claim 9, characterized in that: The elastic column (4) comprises a sleeve, a spring and a ball, the first end of the sleeve is connected to the inner wall of the housing (100), and the spring is arranged in the sleeve; The diameter of the ball is smaller than the inner diameter of the sleeve. The ball is partially arranged in the sleeve. The part located in the sleeve abuts against the spring, and the part located outside the sleeve abuts against the corresponding clamping plate.

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