Maintenance tool and LED display system having the same

Abstract

The utility model provides a maintenance tool and an LED display system having the same, wherein the maintenance tool is used to move the LED display unit between the front and rear sides of a support frame, the support frame includes an avoidance hole, and the maintenance tool includes: a main body; a connecting part, which is detachably connected to the LED display unit, the connecting part is pivotally connected to the first end of the main body, when the connecting part is in the initial position, the connecting part and the main body are arranged at an angle, when the connecting part is in the disassembly position, the connecting part and the main body are arranged in an overlapping manner or extended in the same direction, the LED display unit is matched with the main body and extends in the same direction as the main body; a limiting part, which is arranged on the main body, the limiting part can be limited and matched with the LED display unit, so that the LED display unit remains in a state of extending in the same direction as the main body and can follow the main body through the avoidance hole. The technical solution of the present application can effectively solve the problem of difficult maintenance of LED display devices in the related art.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display, in particular to a maintenance tool and an LED display system having the same. Background Art

[0002] With the continuous development of LED display technology, LED display devices are used in more and more different scenes in modern life, and LED display devices are manufactured in various forms. Among them, outdoor curved display screen is a kind of LED display device with better user experience. This LED display system includes a curved support frame and a small-pitch LED display unit arranged on the front side of the support frame.

[0003] Usually, this kind of LED display system is installed at a high place on the outer side of the building to achieve a better user experience; however, when the LED display system fails or the staff needs to maintain the LED display system, the staff usually needs to remove the LED display unit from the front side of the LED display system to maintain the LED display unit. High-altitude work will bring certain safety hazards to maintenance personnel, so a safer maintenance method is needed.

[0004] Therefore, in the art, there exists a technical problem that it is difficult to maintain the LED display device. Utility Model Content

[0005] The main purpose of the utility model is to provide a maintenance tool and an LED display system having the same, so as to solve the problem of difficulty in maintaining the LED display system in the related art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a maintenance tool is provided for moving an LED display unit between the front and rear sides of a support frame, the support frame includes an avoidance hole running through the front and rear surfaces of the support frame, and the LED display unit can move between the front and rear sides of the support frame through the avoidance hole, and the maintenance tool includes: a main body; a connecting part, which is detachably connected to the LED display unit, the connecting part is pivotally connected to the first end of the main body, the connecting part has an initial position and a disassembly position, when the connecting part is in the initial position, the connecting part and the main body are arranged at an angle, when the connecting part is in the disassembly position, the connecting part and the main body are overlapped or extended in the same direction, the LED display unit is abutted against the main body and extends in the same direction as the main body; a limiting part, which is arranged on the main body, when the connecting part is in the disassembly position, the limiting part can cooperate with the LED display unit to limit the LED display unit so that the LED display unit remains in a state of extending in the same direction as the main body and can follow the main body through the avoidance hole.

[0007] Furthermore, the maintenance tool also includes an operating handle arranged at the second end of the main body.

[0008] Furthermore, the main body includes a rod body, the rod body is a flat rod structure, one end of the rod body away from the connecting portion forms the second end of the main body, and a reinforcement portion is provided between the end of the rod body away from the connecting portion and the operating handle.

[0009] Further, the cross section of the operating handle is polygonal so that the operating handle has a plurality of planes, and the reinforcing portion is connected to one of the planes.

[0010] Furthermore, the connecting part includes a main body plate and a first mounting plate arranged at an angle to the main body plate, the main body plate is detachably connected to the LED display unit, the main body part also includes a second mounting plate arranged at an angle to the rod body, and the maintenance tool also includes a rotating shaft, which passes through the first mounting plate and the second mounting plate.

[0011] Furthermore, the connecting portion further includes a reinforcing protrusion arranged between the first mounting plate and the main body plate; and / or the first mounting plate protrudes from a side of the main body plate close to the rod body.

[0012] Furthermore, the limiting portion is a limiting recess or a limiting column.

[0013] According to another aspect of the utility model, a LED display system is provided, including an LED display device and a maintenance tool, the LED display device includes a support frame and an LED display unit detachably arranged on the support frame, the maintenance tool is detachably connected to the LED display unit, and the maintenance tool is the above-mentioned maintenance tool.

[0014] Further, the LED display unit includes an LED box and an LED display module arranged on the front side of the LED box, the LED box includes a first enclosure and a second enclosure arranged in sequence from back to front and a bottom shell arranged on the rear side of the first enclosure, and the LED display module is arranged on the front side of the second enclosure, wherein the projection of the first enclosure on the LED display module is within the range of the projection of the second enclosure on the LED display module; and / or, in the direction from front to back, the cross-sectional area of ​​the first enclosure gradually decreases.

[0015] Furthermore, the connection between the connecting portion and the LED display unit is set away from the central symmetry line in the length direction of the LED display unit; and / or the LED display unit is a rectangular structure, the width of the LED display unit is greater than the width of the avoidance hole and less than the length of the avoidance hole, and the thickness of the LED display unit is less than the width of the avoidance hole.

[0016] By applying the technical solution of the utility model, the LED display unit is installed on the front side of the support frame, and the maintenance tool can be connected to the LED display unit through the avoidance hole. After the maintenance tool is connected to the LED display unit, the staff can use the maintenance tool to move the LED display unit from the front side of the support frame to the back side of the support frame through the avoidance hole. Specifically, the maintenance tool includes a main body, a connecting part, and a limiting part. The main body serves as a structural support base, and the connecting part is detachably connected to the LED display unit. The connecting part is pivotally connected to the first end of the main body. When the staff needs to move the LED display unit, the connecting part is switched from the initial position to the disassembly position, so that the connecting part and the main body are overlapped or extended in the same direction, so that the LED display unit and the main body are abutted and extended in the same direction as the main body. The staff only needs to move the main body backward to make the LED display unit move with the main body, so that the LED display unit passes through the avoidance hole and moves to the rear side of the support frame, so that the staff does not have to perform maintenance operations with certain safety risks on the front side of the support frame, thereby reducing the difficulty of maintaining the LED display device; in addition, when the connecting part is in the disassembly position, the limiting part and the LED display unit are limited to make the LED display unit remain in a state of extending in the same direction as the main body, so that the relative displacement of the LED display unit and the main body can be limited, making maintenance work easier, and also reducing the possibility of the LED display unit colliding with the support frame due to shaking when the staff uses the maintenance tool. Therefore, the technical solution of the present application can effectively solve the problem of difficult maintenance of LED display devices in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a maintenance tool according to the utility model is shown;

[0019] Figure 2 Shows Figure 1 An enlarged schematic diagram of part A of the maintenance tool;

[0020] Figure 3 A three-dimensional structural schematic diagram showing a partial structure of an embodiment of an LED display system according to the utility model;

[0021] Figure 4 Shows Figure 3 An enlarged schematic diagram of part B of the LED display system;

[0022] Figure 5Shows Figure 3 A schematic diagram of a three-dimensional structure of an LED display unit and a maintenance tool of an LED display system, wherein the connection portion is in a disassembly position;

[0023] Figure 6 Shows Figure 3 A schematic diagram of a three-dimensional structure of an LED display unit and a maintenance tool of an LED display system, wherein the connection portion is in an initial position;

[0024] Figure 7 Shows Figure 3 A schematic top view of an LED display unit of an LED display system.

[0025] The above drawings include the following reference numerals:

[0026] 1. Support frame; 101. Avoidance hole; d2. Width of avoidance hole; d3. Length of avoidance hole;

[0027] 2. LED display unit; 201. limit column; 202. LED box; 2021. first enclosure; 2022. second enclosure; 2023. bottom shell; 203. LED display module; 204. central symmetry line; d1. width of LED display unit; d4. thickness of LED display unit;

[0028] 10. Main body; 11. Rod body; 12. Reinforcement; 13. Second mounting plate;

[0029] 20. Connecting portion; 21. Main body plate; 22. First mounting plate; 23. Reinforcement protrusion;

[0030] 30. a limiting portion; 31. a limiting recess;

[0031] 40. operating handle; 41. plane;

[0032] 50. Rotating axis. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0034] like Figures 1 to 6As shown, the present application provides a maintenance tool for moving the LED display unit 2 between the front and rear sides of the support frame 1. The support frame 1 includes an avoidance hole 101 that runs through the front and rear surfaces of the support frame 1. The LED display unit 2 can move between the front and rear sides of the support frame 1 through the avoidance hole 101. An embodiment of the maintenance tool of the present application includes: a main body 10, a connecting part 20, and a limiting part 30; the connecting part 20 is detachably connected to the LED display unit 2, the connecting part 20 is pivotally connected to the first end of the main body 10, the connecting part 20 has an initial position and a disassembly position, and when the connecting part 20 is in In the initial position, the connecting portion 20 is arranged at an angle with the main body 10. When the connecting portion 20 is in the disassembly position, the connecting portion 20 and the main body 10 are overlapped or extended in the same direction, and the LED display unit 2 is abutted against the main body 10 and extends in the same direction as the main body 10; the limiting portion 30 is arranged on the main body 10. When the connecting portion 20 is in the disassembly position, the limiting portion 30 can be limited and matched with the LED display unit 2 to keep the LED display unit 2 in a state of extending in the same direction as the main body 10 and can follow the main body 10 through the avoidance hole 101.

[0035] By applying the technical solution of this embodiment, the LED display unit 2 is installed on the front side of the support frame 1, and the maintenance tool can pass through the avoidance hole 101 to connect with the LED display unit 2. After the maintenance tool is connected with the LED display unit 2, the staff can use the maintenance tool to move the LED display unit 2 from the front side of the support frame 1 to the back side of the support frame 1 through the avoidance hole 101. Specifically, the maintenance tool includes a main body 10, a connecting part 20, and a limiting part 30. The main body 10 serves as a structural support basis. The connecting part 20 is detachably connected to the LED display unit 2. The connecting part 20 is pivotally connected to the first end of the main body 10. When the staff needs to move the LED display unit 2, the connecting part 20 is switched from the initial position to the disassembly position, so that the connecting part 20 and the main body 10 are overlapped or extended in the same direction, thereby making the LED display unit 2 abut against the main body 10 and extend in the same direction as the main body 10. The staff only needs to move the main body 10 backwards to make the LED display unit 2 move with the main body 10, so as to move the LED display unit 2 from The LED display unit 2 is moved to the rear side of the support frame 1 through the avoidance hole 101, so that the staff does not have to perform maintenance operations with certain safety risks on the front side of the support frame 1, thereby reducing the difficulty of maintaining the LED display system; in addition, when the connecting part 20 is in the disassembly position, the limiting part 30 cooperates with the LED display unit 2 to limit the LED display unit 2 so that the LED display unit 2 remains in a state of extending in the same direction as the main body 10, thereby limiting the relative displacement of the LED display unit 2 and the main body 10, making maintenance work easier, and reducing the possibility that the LED display unit 2 will collide with the support frame 1 due to shaking when the staff uses the maintenance tools. Therefore, the technical solution of this embodiment can effectively solve the problem of difficult maintenance of LED display devices in related technologies.

[0036] It should be noted that “the connecting portion 20 and the main body 10 are arranged to overlap” means that the angle between the connecting portion 20 and the main body 10 is 0 degrees, that is, the connecting portion 20 and the main body 10 are in different planes parallel to each other, or, the angle between the connecting portion 20 and the main body 10 is 0 degrees to 5 degrees, for example, the connecting portion 20 and the main body 10 can be 1 degree, 3 degrees or 5 degrees; “the connecting portion 20 and the main body 10 are extended in the same direction” means that the angle between the connecting portion 20 and the main body 10 is 180 degrees, that is, the connecting portion 20 and the main body 10 are in the same plane, or, the angle between the connecting portion 20 and the main body 10 is 175 degrees to 185 degrees, for example, the connecting portion 20 and the main body 10 can be 176 degrees, 177 degrees or 183 degrees.

[0037] like Figure 1 , Figure 2 , Figure 5 as well as Figure 6As shown, the maintenance tool further includes an operating handle 40 disposed at the second end of the main body 10. Specifically, the operating handle 40 can facilitate the operator to operate the maintenance tool so that the LED display unit 2 can be turned over or moved along with the maintenance tool.

[0038] like Figures 1 to 6 As shown, the main body 10 includes a rod body 11, which is a flat rod structure. One end of the rod body 11 away from the connecting portion 20 forms the second end of the main body 10, and a reinforcing portion 12 is provided between the end of the rod body 11 away from the connecting portion 20 and the operating handle 40. Specifically, when the connecting portion 20 is in the disassembly position, there is a large contact area between the rod body 11 of the flat rod structure and the LED display unit 2 so that the LED display unit 2 can be stably abutted against the rod body 11, and the reinforcing portion 12 is provided between the end of the rod body 11 away from the connecting portion 20 and the operating handle 40. Since the thickness of the rod body 11 of the flat rod structure is relatively thin, in order to ensure the structural stability of the connection between the rod body 11 and the operating handle 40, a thick reinforcing portion 12 is provided to enhance the structural strength between the rod body 11 and the operating handle 40.

[0039] like Figures 1 to 6 As shown, the cross section of the operating handle 40 is polygonal so that the operating handle 40 has a plurality of planes 41, and the reinforcing portion 12 is connected to one of the planes 41. Specifically, such a configuration can enhance the friction between the staff and the operating handle 40, so that the staff can more easily operate the maintenance tool, thereby facilitating the staff to operate the maintenance tool to flip and move the LED display unit 2; in addition, the reinforcing portion 12 can be connected to one of the planes 41 by welding, which, on the one hand, is simple in processing technology, and on the other hand, enables the reinforcing portion 12 and the operating handle 40 to have a larger connection area to enhance the connection strength between them.

[0040] like Figure 1 , Figure 2 As shown, the connecting part 20 includes a main body plate 21 and a first mounting plate 22 arranged at an angle to the main body plate 21, the main body plate 21 is detachably connected to the LED display unit 2, the main body 10 also includes a second mounting plate 13 arranged at an angle to the rod body 11, and the maintenance tool also includes a rotating shaft 50, which is passed through the first mounting plate 22 and the second mounting plate 13. Specifically, the first mounting plate 22 and the second mounting plate 13 provide a mounting base for the rotating shaft 50, so that the connecting part 20 and the main body 10 can be pivotally connected, which has the advantages of simple structure and easy processing, and a connecting hole is provided on the main body plate 21 to facilitate the detachable connection between the connecting part 20 and the LED display unit 2 by bolts.

[0041] like Figure 1 , Figure 2As shown, the connection portion 20 further includes a reinforcement protrusion 23 disposed between the first mounting plate 22 and the main body plate 21. Specifically, the reinforcement protrusion 23 can strengthen the connection strength between the first mounting plate 22 and the main body plate 21.

[0042] like Figure 1 , Figure 2 As shown, the first mounting plate 22 protrudes from one side of the main plate 21 close to the rod body 11. Specifically, when the connecting portion 20 is in the disassembly position and the connecting portion 20 and the main body 10 are extended in the same direction, the connecting portion 20 and the main body 10 are spaced apart and have an avoidance gap to avoid interference between the connecting portion 20 and the main body 10.

[0043] In this embodiment, if Figures 1 to 4 As shown, the limiting portion 30 is a limiting recess 31. Specifically, a limiting post 201 is provided on the rear surface of the LED display unit 2, and the limiting post 201 can be interference-fitted with the limiting recess 31 to achieve limiting fit between the limiting portion 30 and the LED display unit 2. In addition, in other embodiments not shown in the figure, the limiting portion can be a limiting post, and the limiting recess that is interference-fitted with the limiting post is provided on the LED display unit, which can also achieve the above-mentioned limiting effect.

[0044] The present application also provides an LED display system, the LED display system of the present application includes an LED display device and a maintenance tool, the LED display device includes a support frame 1 and an LED display unit 2 detachably arranged on the support frame 1, the maintenance tool is detachably connected to the LED display unit 2, wherein the maintenance tool is the above-mentioned maintenance tool. The above-mentioned maintenance tool can effectively solve the problem of difficulty in maintaining the LED display device in the related art, and the LED display system with the above-mentioned maintenance tool also has the above-mentioned advantages.

[0045] like Figures 3 to 7As shown, the LED display unit 2 includes an LED box 202 and an LED display module 203 arranged on the front side of the LED box 202, the LED box 202 includes a first enclosure 2021 and a second enclosure 2022 arranged in sequence from back to front and a bottom shell 2023 arranged on the rear side of the first enclosure 2021, and the LED display module 203 is arranged on the front side of the second enclosure 2022, wherein the projection of the first enclosure 2021 on the LED display module 203 is within the range of the projection of the second enclosure 2022 on the LED display module 203. Specifically, the LED display unit 2 is used for splicing curved screens. During the process of splicing multiple LED display units 2, in the width direction of the LED display unit 2, the second panels 2022 of two adjacent LED display units 2 press against each other. Since the projection of the first panel 2021 on the LED display module 203 is within the range of the projection of the second panel 2022 on the LED display module 203, there is an avoidance space between the first panels 2021 of the two adjacent LED display units 2, so that one LED display unit 2 can rotate toward the other LED display unit 2 along the contact line of the two second panels 2022, thereby making the two LED display modules 203 form a certain curvature.

[0046] like Figure 7 As shown, the cross-sectional area of ​​the first enclosure 2021 gradually decreases from front to back. Specifically, such an arrangement can ensure that there is a sufficiently large avoidance space between the first enclosures 2021 of two adjacent LED display units 2, so that the two LED display modules 203 can form an ideal curvature.

[0047] like Figure 5 As shown, the connection between the connection part 20 and the LED display unit 2 is set away from the central symmetry line 204 in the length direction of the LED display unit 2. Specifically, the central symmetry line 204 is parallel to the width direction of the LED display unit 2. Such a setting allows the LED display unit 2 to rotate around the rotation axis 50 under the action of its own gravity, thereby allowing the LED display unit 2 to drive the connection part 20 to switch from the initial position to the disassembly position.

[0048] In addition, if Figures 3 to 7As shown, the LED display unit 2 is a rectangular parallelepiped structure, the width d1 of the LED display unit 2 is larger than the width d2 of the avoidance hole 101 and smaller than the length d3 of the avoidance hole 101 , and the thickness d4 of the LED display unit 2 is smaller than the width d2 of the avoidance hole 101 . Specifically, the width d1 of the LED display unit 2 is greater than the width d2 of the avoidance hole 101, so that in the width direction of the LED display unit 2, the LED display unit 2 and the support frame 1 have a sufficiently large contact area to ensure that the LED display unit 2 is stably connected to the support frame 1; when the staff then rotates the maintenance tool around the axial direction of the main body 10, the thickness direction of the LED display unit 2 can correspond to the width direction of the avoidance hole 101 and the width direction of the LED display unit 2 can correspond to the length direction of the avoidance hole 101, the width d1 of the LED display unit 2 is smaller than the length d3 of the avoidance hole 101, so that in the up and down directions, the LED display unit 2 will not interfere with the avoidance hole 101, and the thickness d4 of the LED display unit 2 is smaller than the width d2 of the avoidance hole 101, so that in the horizontal direction of this LED display unit 2, this LED display unit 2 will not interfere with the corresponding avoidance hole 101.

[0049] like Figure 3 As shown, the method of using the maintenance tool is explained: when the staff needs to maintain the LED display unit 2, first connect the connecting part 20 to the upper part of the back side of the LED display unit 2, and then remove the fasteners between the LED display unit 2 and the support frame 1, and then the staff rotates the maintenance tool around the axial direction of the main body 10, so that the main body 10 is located above the LED display unit 2, and the LED display unit 2 drives the connecting part 20 to rotate relative to the main body 10 due to its own gravity, and the connecting part 20 switches from the initial position to the disassembly position, so that the LED display unit 2 and the main body 10 are abutted and matched, and then the LED display unit 2 is maintained in a state of extending in the same direction as the main body 10 through the limiting part 30, and then the staff rotates the maintenance tool around the axial direction of the main body 10, so that the thickness direction of the LED display unit 2 corresponds to the width direction of the avoidance hole 101 and the width direction of the LED display unit 2 corresponds to the length direction of the avoidance hole 101, so that the LED display unit 2 can pass through the avoidance hole 101, and finally the staff operates the maintenance tool to drive the LED display unit 2 to move through the avoidance hole 101.

[0050] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A maintenance tool for moving an LED display unit (2) between the front and rear sides of a support frame (1), the support frame (1) comprising an avoidance hole (101) penetrating the front and rear surfaces of the support frame (1), the LED display unit (2) being able to move between the front and rear sides of the support frame (1) through the avoidance hole (101), characterized in that: The maintenance tool comprises: A main body (10); a connecting portion (20) detachably connected to the LED display unit (2); the connecting portion (20) is pivotally connected to the first end of the main body (10); the connecting portion (20) has an initial position and a disassembly position; when the connecting portion (20) is in the initial position, the connecting portion (20) and the main body (10) are arranged at an angle; when the connecting portion (20) is in the disassembly position, the connecting portion (20) and the main body (10) are arranged to overlap or extend in the same direction; the LED display unit (2) abuts against the main body (10) and extends in the same direction as the main body (10); A limiting portion (30) is arranged on the main body (10); when the connecting portion (20) is in the disassembly position, the limiting portion (30) can cooperate with the LED display unit (2) to limit the position, so that the LED display unit (2) remains in a state of extending in the same direction as the main body (10) and can follow the main body (10) through the avoidance hole (101).

2. The maintenance tool according to claim 1, characterized in that: The maintenance tool further comprises an operating handle (40) arranged at the second end of the main body (10).

3. The maintenance tool according to claim 2, characterized in that: The main body (10) comprises a rod body (11), the rod body (11) being a flat rod structure, one end of the rod body (11) away from the connecting portion (20) forming a second end of the main body (10), and a reinforcing portion (12) being provided between the end of the rod body (11) away from the connecting portion (20) and the operating handle (40).

4. The maintenance tool according to claim 3, characterized in that: The cross section of the operating handle (40) is polygonal so that the operating handle (40) has a plurality of planes (41), and the reinforcing portion (12) is connected to one of the planes (41).

5. The maintenance tool according to claim 3, characterized in that: The connecting portion (20) comprises a main body plate (21) and a first mounting plate (22) arranged at an angle to the main body plate (21), wherein the main body plate (21) is detachably connected to the LED display unit (2), the main body (10) further comprises a second mounting plate (13) arranged at an angle to the rod body (11), and the maintenance tool further comprises a rotating shaft (50), wherein the rotating shaft (50) is passed through the first mounting plate (22) and the second mounting plate (13).

6. The maintenance tool according to claim 5, characterized in that: The connecting portion (20) further comprises a reinforcing protrusion (23) arranged between the first mounting plate (22) and the main body plate (21); and / or, The first mounting plate (22) protrudes from a side of the main body plate (21) close to the rod body (11).

7. The maintenance tool according to any one of claims 1 to 6, characterized in that: The limiting portion (30) is a limiting recess (31) or a limiting column.

8. An LED display system, comprising an LED display device and a maintenance tool, wherein the LED display device comprises a support frame (1) and an LED display unit (2) detachably arranged on the support frame (1), and the maintenance tool is detachably connected to the LED display unit (2), characterized in that: The maintenance tool is the maintenance tool according to any one of claims 1 to 7.

9. The LED display system according to claim 8, characterized in that: The LED display unit (2) comprises an LED box (202) and an LED display module (203) arranged on the front side of the LED box (202); the LED box (202) comprises a first enclosure (2021) and a second enclosure (2022) arranged in sequence from back to front, and a bottom shell (2023) arranged on the rear side of the first enclosure (2021); the LED display module (203) is arranged on the front side of the second enclosure (2022), wherein: The projection of the first enclosure (2021) on the LED display module (203) is located within the range of the projection of the second enclosure (2022) on the LED display module (203); and / or, In the direction from front to back, the cross-sectional area of ​​the first enclosure (2021) gradually decreases.

10. The LED display system according to claim 8, characterized in that: The connection point between the connecting portion (20) and the LED display unit (2) is arranged away from the central symmetry line (204) in the length direction of the LED display unit (2); and / or, The LED display unit (2) is a rectangular parallelepiped structure, the width (d1) of the LED display unit (2) is greater than the width (d2) of the avoidance hole (101) and less than the length (d3) of the avoidance hole (101), and the thickness (d4) of the LED display unit (2) is less than the width (d2) of the avoidance hole (101).

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