LED cabinet connection device and LED display device

Abstract

This invention provides a connection device for an LED cabinet and an LED display device. The connection device for the LED cabinet includes: a first connection component including a first insertion part; a second connection component including: a fixed base; a second insertion part movably disposed on the fixed base, having an extended position for engaging with the first insertion part and a retracted position separated from the first insertion part; a driving part movably disposed on the fixed base, the driving part being connected to the second insertion part via a linkage device to drive the second insertion part to move between the retracted position and the extended position; and an elastic reset member disposed between the fixed base and the driving part. The technical solution of this application can effectively solve the problem of LED beads being easily bumped during wire connection of LED cabinets in related technologies.

Description

Technical Field

[0001] This invention relates to the field of LED displays, and more specifically, to a connection device for an LED cabinet and an LED display device. Background Technology

[0002] In related technologies, after LED cabinets are assembled, the wires between the cabinets need to be manually plugged in and cascaded. During installation, the male and female connectors of adjacent cabinets need to be plugged in to achieve cascading of power and signals between the cabinets. For aesthetic reasons and to protect the cascading wires, most cabinets hide the cascading wires inside the cabinet. This requires opening the rear cover or part of the rear cover during wiring, and then reinstalling the rear cover. This process is complex, cumbersome, and inefficient.

[0003] To address the aforementioned issues, some enclosures currently employ a solution where connectors are individually fixed to the side walls of the enclosure. While this resolves the issue of manual operation required for cascading wiring between enclosures, it also introduces the risk of knocking lights due to collisions between enclosures during assembly. Summary of the Invention

[0004] The main objective of this invention is to provide a connection device for an LED cabinet and an LED display device to solve the problem of LED beads being easily bumped during wire connection of LED cabinets in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a connection device for an LED housing is provided, comprising: a first connection assembly including a first insertion portion; a second connection assembly including: a fixing base; a second insertion portion movably disposed on the fixing base and having an extended position for engaging with the first insertion portion and a retracted position separated from the first insertion portion; a driving unit movably disposed on the fixing base, the driving unit being connected to the second insertion portion via a linkage device to drive the second insertion portion to move between the retracted position and the extended position; and an elastic reset member disposed between the fixing base and the driving unit.

[0006] Furthermore, the linkage device includes a swing arm that is oscillatingly mounted on a fixed base, with a first end of the swing arm movably connected to a second insertion part and a second end of the swing arm movably connected to a drive part.

[0007] Furthermore, the connecting device also includes a first slide groove and a first pin disposed in the first slide groove. One of the first pin and the first slide groove is disposed at the first end of the rocker arm, and the other is disposed on the second insertion part. The fixing seat also includes a first guide structure. The second insertion part moves between the retracted position and the extended position under the guidance of the first guide structure.

[0008] Furthermore, the connecting device also includes a second slide groove and a second pin disposed in the second slide groove. One of the second pin and the second slide groove is disposed on the second end of the rocker arm, and the other is disposed on the drive unit. The fixed seat also includes a second guide structure, and the drive unit moves under the guidance of the second guide structure.

[0009] Furthermore, the elastic reset element is a spring, and the driving part includes a driving rod and an abutment part located at the first end of the driving rod. The driving rod is disposed in the second guide structure, and the spring is sleeved on the driving rod and located between the fixed seat and the abutment part.

[0010] Furthermore, the drive unit includes a drive rod and a stop portion disposed at the second end of the drive rod. The drive rod is disposed within the second guide structure, the second pin is disposed on the second end of the rocker arm, and the second slide groove is disposed at the stop portion.

[0011] Furthermore, the first guide structure is a housing, the second insertion part is disposed inside the housing, the housing is provided with a third sliding groove, and the first pin passes through the third sliding groove.

[0012] Furthermore, the connecting device also includes a pin hole and a third pin passing through the pin hole, one of which is located on the fixed seat and the other is located on the rocker arm.

[0013] According to another aspect of the present invention, an LED display device is provided, comprising: a first LED housing, a second LED housing, and a connecting device disposed between the first LED housing and the second LED housing, wherein the connecting device is the connecting device described above.

[0014] Furthermore, the first connecting component of the connecting device is disposed in the first LED housing, the second connecting component of the connecting device is disposed in the second LED housing, and the side wall of the second LED housing is provided with an opening for the second plug-in part and the driving part of the connecting device to pass through. The fixing seat of the connecting device is an independent component, or the fixing seat of the connecting device is formed by part of the structure of the second LED housing.

[0015] According to the technical solution of this invention, the connecting device includes a first connecting component and a second connecting component. The first connecting component includes a first insertion portion, and the second connecting component includes a second insertion portion. The first and second insertion portions are respectively disposed on two adjacent LED housings, and can be inserted and engaged to achieve power supply or signal connection between the LED housings. The second connecting component also includes a fixing base and a driving unit. The fixing base is fixed to the LED housing. The driving unit can drive the second insertion portion to move between a retracted position and an extended position via a linkage device. When two adjacent LED housings are connected, the driving unit moves inward to switch the second insertion portion to the extended position, where it extends outside the LED housing and inserts into the first insertion portion. When two adjacent LED housings are not connected, under the action of an elastic reset member, the driving unit extends outward to place the second insertion portion in the retracted position, where it retracts into the LED housing, thus protecting the second insertion portion. Meanwhile, this design ensures that the second connector does not protrude from the side wall of the LED enclosure, preventing it from bumping against the LED panel and causing the LED chips to fall out during installation. Furthermore, the elastic reset component acts as a buffer during LED enclosure installation, effectively preventing collisions between LED enclosures and thus avoiding damage to the LED chips. Therefore, the technical solution of this application effectively solves the problem of LED chips easily bumping during wiring connections in related technologies. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A perspective structural schematic diagram of an embodiment of a connecting device for an LED housing according to the present invention is shown, wherein the second insertion portion of the connecting device is in the retracted position;

[0018] Figure 2 It shows Figure 1 A cross-sectional schematic diagram of the connecting device;

[0019] Figure 3 It shows Figure 1 A three-dimensional structural diagram of the connecting device, wherein the second insertion part of the connecting device is located in the extended position;

[0020] Figure 4 It shows Figure 3 A cross-sectional schematic diagram of the connecting device;

[0021] Figure 5 It shows Figure 1A three-dimensional structural diagram of the second plug-in portion of the connecting device;

[0022] Figure 6 It shows Figure 1 A three-dimensional structural diagram of the elastic reset component of the connecting device;

[0023] Figure 7 It shows Figure 1 A three-dimensional structural diagram of the second insertion part and the fixing seat of the connecting device;

[0024] Figure 8 A three-dimensional structural schematic diagram of the LED display device according to the present invention is shown;

[0025] Figure 9 It shows Figure 8 An enlarged view of point A on the LED display device;

[0026] Figure 10 It shows Figure 8 An enlarged view of point B on the LED display device;

[0027] Figure 11 It shows Figure 8 A partial cross-sectional view of an LED display device, wherein the second connector of the connecting device is in the extended position; and

[0028] Figure 12 It shows Figure 8 A partial cross-sectional view of the LED display device, wherein the second connector of the connecting device is in the retracted position.

[0029] The above figures include the following reference numerals:

[0030] 1. First connecting component; 2. Second connecting component; 3. First LED housing; 4. Second LED housing; 10. First insertion part; 20. Fixing base; 21. First guide structure; 22. Second guide structure; 30. Second insertion part; 40. Driving part; 41. Driving rod; 42. Abutment part; 43. Stop part; 50. Linkage device; 51. Swing rod; 60. Elastic reset component; 71. First slide groove; 72. First pin; 73. Second slide groove; 74. Second pin; 75. Third slide groove; 76. Pin hole; 77. Third pin. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] like Figures 1 to 4 , Figure 8 , Figure 9 and Figure 11As shown, an embodiment of the LED cabinet connection device of this application includes a first connection component 1 and a second connection component 2. The first connection component 1 includes a first insertion portion 10, and the second connection component 2 includes a fixed base 20, a second insertion portion 30, a driving portion 40, a linkage device 50, and an elastic reset member 60. The second insertion portion 30 is movably disposed on the fixed base 20 and has an extended position for engaging with the first insertion portion 10 and a retracted position for separating from the first insertion portion 10. The driving portion 40 is movably disposed on the fixed base 20 and is connected to the second insertion portion 30 via the linkage device 50 to drive the second insertion portion 30 to move between the retracted position and the extended position. The elastic reset member 60 is disposed between the fixed base 20 and the driving portion 40.

[0035] Applying the technical solution of this embodiment, the connecting device includes a first connecting component 1 and a second connecting component 2. The first connecting component 1 includes a first insertion part 10, and the second connecting component 2 includes a second insertion part 30. The first insertion part 10 and the second insertion part 30 are respectively disposed on two adjacent LED housings, and can be inserted and engaged to achieve power supply or signal connection between the LED housings. The second connecting component 2 also includes a fixing base 20 and a driving part 40. The fixing base 20 is fixed to the LED housing. The driving part 40 can drive the second insertion part 30 to move between a retracted position and an extended position via a linkage device 50. When two adjacent LED housings are connected, the driving part 40 moves inward to switch the second insertion part 30 to the extended position, whereby the second insertion part 30 extends outside the LED housing and inserts and connects with the first insertion part 10. When two adjacent LED enclosures are not connected, the driving part 40 extends outward under the action of the elastic reset member 60, so that the second plug-in part 30 is in the retracted position and retracts into the LED enclosure. This prevents the second plug-in part 30 from protruding from the side wall of the LED enclosure, thus protecting it. Simultaneously, during LED enclosure installation, the second plug-in part 30 will not bump into the LED enclosure's light board, causing the LED chips to fall out. Furthermore, during LED enclosure installation, the elastic reset member 60 acts as a buffer, effectively preventing collisions between LED enclosures and thus avoiding damage to the LED chips. Therefore, the technical solution of this application effectively solves the problem of LED chips easily bumping during wiring connections in related technologies.

[0036] like Figures 1 to 4As shown, the linkage device 50 includes a swing rod 51 swayably mounted on the fixed base 20. The first end of the swing rod 51 is movably connected to the second insertion part 30, and the second end of the swing rod 51 is movably connected to the drive part 40. The two ends of the swing rod 51 are connected to the second insertion part 30 and the drive part 40 respectively, and the drive part 40 can drive the second insertion part 30 to move between a retracted position and an extended position via the swing rod 51. Compared to other linkage devices, the swing rod 51 has the advantages of simple structure and reliable transmission. Furthermore, since the swing rod 51 is movably connected to the second insertion part 30 and the drive part 40, the swing rod 51, the second insertion part 30, and the drive part 40 will not jam during movement.

[0037] like Figures 1 to 5 As shown, the connecting device also includes a first slide groove 71 and a first pin 72 disposed within the first slide groove 71. The fixed base 20 also includes a first guide structure 21. The second insertion part 30 moves between a retracted position and an extended position under the guidance of the first guide structure 21. In this embodiment, the first slide groove 71 is disposed in the second insertion part 30, and the first pin 72 is disposed at the first end of the swing rod 51. During the swinging process of the swing rod 51, the first pin 72 slides within the first slide groove 71, driving the second insertion part 30 to move under the guidance of the first guide structure 21, so that the second insertion part 30 can switch between the retracted position and the extended position. Preferably, the first slide groove 71 is an elongated slide groove, the width of the first slide groove 71 is slightly larger than the diameter of the first pin 72, and the first slide groove 71 is perpendicular to the movement direction of the second insertion part 30. In this way, the first slide groove 71 and the swing rod 51 are easy to manufacture, and the movement of the second insertion part 30 is reliable and smooth. Of course, the first groove can also be of other shapes, as long as it can enable the swing arm to drive the second insertion part to move along a predetermined trajectory.

[0038] like Figures 1 to 6 As shown, the connecting device further includes a second slide groove 73 and a second pin 74 disposed within the second slide groove 73. The fixed base 20 also includes a second guide structure 22, and the driving unit 40 moves under the guidance of the second guide structure 22. In this embodiment, the second slide groove 73 is disposed on the driving unit 40, and the second pin 74 is disposed on the second end of the rocker arm 51. The driving unit 40 moves under the guidance of the second guide structure 22, causing the second pin 74 to move along the second slide groove 73, thereby driving the rocker arm 51 to rotate. Preferably, the second slide groove 73 is an elongated slide groove, the width of the second slide groove 73 is slightly larger than the diameter of the second pin 74, and the second slide groove 73 is perpendicular to the direction of movement of the driving unit 40. In this way, the rocker arm 51 is easy to process, and the movement of the rocker arm 51 is reliable and smooth. Of course, the second slide groove can also be of other shapes, as long as it can enable the driving unit to drive the rocker arm to swing.

[0039] like Figure 6As shown, the elastic reset member 60 is a spring, and the driving part 40 includes a driving rod 41 and an abutment part 42 located at the first end of the driving rod 41. The driving rod 41 is disposed within the second guide structure 22, and the spring is sleeved on the driving rod 41 and located between the fixed seat 20 and the abutment part 42. The fixed seat 20 includes a seat body and a guide seat, with a guide hole on the guide seat. The driving rod 41 passes through the guide hole, and the spring is located between the guide seat and the abutment part 42. The abutment part and the driving rod can be integrally formed or connected together by screws or other connectors. In this embodiment, the abutment part 42 is a flat plate structure. During the assembly of the LED cabinet, the abutment part 42 abuts against the side wall of the adjacent LED cabinet. Under the push of the side wall of the LED cabinet, the driving rod 41 can move along the guide hole on the guide seat to compress the spring, thereby driving the swing rod 51 to rotate, so that the second insertion part 30 can extend out of the LED cabinet and engage with the first insertion part 10 on the adjacent LED cabinet. When the LED housings are not assembled together, the drive rod 41 moves along the guide hole on the guide seat under the action of the spring force, causing the abutment part 42 to move away from the guide seat and drive the second insertion part 30 to retract into the LED housing through the swing rod 51. In this embodiment, in order to ensure the stability and reliability of the movement of the drive part 40, there are two drive rods 41, and there are also two corresponding springs.

[0040] like Figure 6 As shown, the drive unit 40 includes a drive rod 41 and a stop 43 disposed at the second end of the drive rod 41. The drive rod 41 is disposed within the second guide structure 22, the second pin 74 is disposed on the second end of the rocker arm 51, and the second sliding groove 73 is disposed on the stop 43. The stop 43 can prevent the drive rod 41 from disengaging from the second guide structure 22. Specifically, the stop 43 can be connected to the drive rod 41 by screws.

[0041] like Figures 1 to 6 As shown, the first guide structure 21 is a receiving housing, the second insertion part 30 is disposed inside the receiving housing, and the receiving housing is provided with a third sliding groove 75, through which the first pin 72 passes. In this embodiment, the third sliding groove 75 is an arc-shaped sliding groove, which adapts to the movement trajectory of the first end of the swing rod 51 during the swinging process. Of course, the third sliding groove can also be other shapes, such as an opening provided on the receiving housing, as long as the receiving housing does not obstruct the movement of the first pin.

[0042] like Figures 1 to 4 as well as Figure 7As shown, the connecting device also includes a pin hole 76 and a third pin 77 passing through the pin hole 76. In this embodiment, the third pin 77 is disposed on the fixed base 20, the pin hole 76 is disposed on the rocker arm 51, and a screw is disposed at the end of the third pin 77, so that the rocker arm 51 can swing around the third pin 77 under the drive of the drive unit 40. Figures 1 to 7 In the illustrated embodiment, when the connecting device is not driven by an external force (the two LED housings are not connected), the driving part 40 protrudes from the side wall of the LED housing (e.g., Figure 4 and Figure 11 (As shown). The advantage of this arrangement is that the driving part 40 can be moved inward directly via the side wall of the LED housing, allowing the second insertion part 30 to switch from the retracted position to the extended position. Preferably, the above-mentioned connecting device can be arranged between two adjacent LED housings in the vertical direction. For example... Figure 11 and Figure 12 As shown, during LED cabinet assembly, the elastic reset member 60 of the upper LED cabinet contacts the lower LED cabinet. As the LED cabinet moves downward, the spring compresses, the drive rod 41 moves upward, and drives the swing rod 51 to move. The right end of the swing rod 51 moves upward, and the left end moves downward, causing the second insertion part 30 to move downward. When the two contact surfaces between the LED cabinets overlap, the second insertion part 30 and the first insertion part 10 are inserted into each other.

[0043] Of course, as those skilled in the art will know, in other embodiments, when the connecting device is not driven by an external force (the two LED housings are not connected), the driving unit can always be located inside the LED housing (e.g., Figure 10 (As shown). At this time, an elastic trigger needs to be provided on the LED housing that cooperates with the driving unit. This elastic trigger can extend into the LED housing to push the driving unit to move, thereby realizing the second insertion part switching from the retracted position to the extended position. Preferably, the above-mentioned connecting device can be provided between two adjacent LED housings in the left-right direction.

[0044] This application also provides an LED display device, the implementation of which is, for example... Figures 8 to 12 As shown, it includes a first LED housing 3, a second LED housing 4, and a connecting device disposed between the first LED housing 3 and the second LED housing 4, wherein the connecting device is the aforementioned connecting device.

[0045] The first connecting component 1 of the connecting device is disposed in the first LED housing 3, and the second connecting component 2 of the connecting device is disposed in the second LED housing 4. The side wall of the second LED housing 4 has an opening for the second insertion part 30 and the driving part 40 of the connecting device to pass through. Figure 1As shown, in this embodiment, the fixing base 20 of the connecting device is an independent component. One side of the first connecting component 1 of the connecting device in this embodiment is an elastic reset member 60, and the other side is a second insertion part 30, which are connected by a swing rod 51. When the first LED housing 3 and the second LED housing 4 are assembled, the second insertion part 30 can pop out and automatically align with the first insertion part 10 on the first LED housing 3. Simultaneously, the spring on the connecting device can act as a damping buffer during the assembly process, preventing the LED housings from knocking off the LED beads due to sudden collisions or contact. One of the first insertion part 10 and the second insertion part 30 is a male connector, and the other is a female connector.

[0046] Meanwhile, magnetic pieces are provided at corresponding positions on the side walls of the first LED box 3 and the second LED box 4. During installation, the magnetic pieces attract each other, making it easier to connect the first LED box 3 and the second LED box 4.

[0047] like Figure 11 As shown, when the first LED housing 3 and the second LED housing 4 are not yet installed together, the second insertion part 30 is located inside the second LED housing 4, the spring is in an extended state, and the driving part 40 extends out of the second LED housing 4 through the opening. The driving part 40 acts as a buffer when transporting the second LED housing 4 or when the first LED housing 3 is connected to the second LED housing 4. During the assembly process, as the side walls of the first LED housing 3 and the second LED housing 4 gradually approach each other, the side wall of the first LED housing 3 pushes the driving part 40, compressing the spring and causing the driving part 40 to move into the second LED housing 4, thus driving the swing rod 51 to move. The swing rod 51 swings counterclockwise, with its second end moving towards the inside of the second LED housing and its first end moving towards the outside of the second LED housing. This drives the second insertion part 30 to extend out of the second LED housing 4 through the opening and engage with the first insertion part 10 located on the first LED housing 3. Figure 12 As shown, at this time, the side walls of the first LED housing 3 and the second LED housing 4 are joined together, and the first plug-in part 10 and the second plug-in part 30 are plugged together to realize the power supply connection or signal connection between the first LED housing 3 and the second LED housing 4. The driving part 40 is located inside the second LED housing 4, and the spring is in a compressed state.

[0048] In this embodiment, the second plug-in part 30 is equipped with a plug pin, and the first plug-in part 10 is provided with a plug pin connector. When the first plug-in part 10 and the second plug-in part 30 are plugged together, the plug pin contacts the plug pin connector provided at the corresponding position, thereby realizing the power supply connection or signal connection between the first LED housing 3 and the second LED housing 4.

[0049] During the disassembly of the LED display device, the spring force causes the abutment part 42 to push open the side wall of the first LED cabinet it abuts, making disassembly easier.

[0050] Of course, in the embodiment not shown in the figure, the fixing base of the connecting device may also be composed of part of the structure of the second LED box.

[0051] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An LED display device, characterized in that, include: A first LED housing (3), a second LED housing (4), and a connecting device disposed between the first LED housing (3) and the second LED housing (4); The connecting device includes: A first connecting component (1) is disposed on the first LED housing (3), and the first connecting component (1) includes a first plug-in portion (10). The second connecting component (2) is disposed in the second LED housing (4), and the second connecting component (2) includes: Fixture (20); The second plug-in part (30) is movably disposed on the fixed base (20) and has an extended position that engages with the first plug-in part (10) and a retracted position that separates from the first plug-in part (10). A drive unit (40) is movably disposed on the fixed base (20). The drive unit (40) is connected to the second plug-in part (30) via a linkage device (50) to drive the second plug-in part (30) to move between the retracted position and the extended position. An elastic reset member (60) is disposed between the fixed base (20) and the drive unit (40); The fixed base (20) further includes a second guide structure (22), and the driving part (40) moves under the guidance of the second guide structure (22); The elastic reset member (60) is a spring, and the driving part (40) includes a driving rod (41) and an abutment part (42) located at the first end of the driving rod (41). The driving rod (41) is disposed in the second guide structure (22), and the spring is sleeved on the driving rod (41) and located between the fixed seat (20) and the abutment part (42). When the first LED housing (3) and the second LED housing (4) are connected, the side wall of the first LED housing (3) pushes the driving part (40) to move inward, so that the second plug-in part (30) switches to the extended position, and the second plug-in part (30) extends to the outside of the second LED housing (4) and plugs into the first plug-in part (10); when the first LED housing (3) and the second LED housing (4) are not connected together, under the action of the elastic reset member (60), the driving part (40) extends outward from the second LED housing (4), so that the second plug-in part (30) is in the retracted position, and the second plug-in part (30) retracts into the inside of the second LED housing (4); The linkage device (50) includes a swing rod (51) that is swayably mounted on the fixed base (20). The first end of the swing rod (51) is movably connected to the second plug-in part (30), and the second end of the swing rod (51) is movably connected to the drive part (40). The connecting device further includes a second slide groove (73) and a second pin (74) disposed in the second slide groove (73). One of the second pin (74) and the second slide groove (73) is disposed on the second end of the rocker arm (51), and the other is disposed on the drive unit (40). The drive unit (40) includes a stop (43) disposed at the second end of the drive rod (41), the second pin (74) is disposed at the second end of the rocker arm (51), and the second slide groove (73) is disposed at the stop (43).

2. The LED display device according to claim 1, characterized in that, The connecting device further includes a first slide groove (71) and a first pin (72) disposed in the first slide groove (71). One of the first pin (72) and the first slide groove (71) is disposed at the first end of the rocker arm (51), and the other is disposed on the second plug-in part (30). The fixed base (20) further includes a first guide structure (21). The second plug-in part (30) moves between the retracted position and the extended position under the guidance of the first guide structure (21).

3. The LED display device according to claim 2, characterized in that, The first guide structure (21) is a housing, the second plug-in part (30) is disposed in the housing, the housing is provided with a third slide groove (75), and the first pin (72) passes through the third slide groove (75).

4. The LED display device according to claim 1, characterized in that, The connecting device further includes a pin hole (76) and a third pin (77) passing through the pin hole (76). One of the pin hole (76) and the third pin (77) is disposed on the fixed seat (20), and the other is disposed on the swing rod (51).

5. The LED display device according to claim 1, characterized in that, The second LED housing (4) has an opening on its side wall for the second plug-in part (30) and the drive part (40) of the connecting device to pass through. The fixing seat (20) of the connecting device is an independent component, or the fixing seat (20) of the connecting device is formed by part of the structure of the second LED housing (4).

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