CN219204983U - Power supply box assembly and LED display device with same - Google Patents

Abstract

The utility model provides a power supply box assembly and an LED display device with the same, wherein the power supply box assembly comprises: a case body; the box cover is arranged on the box body in an openable and closable manner and is provided with a cover closing position for closing the box body and a bearing position for opening the box body; the hinge structure is connected between the box body and the box cover and comprises a first connecting rod group and a second connecting rod group which is hinged with the first connecting rod group, two ends of the first connecting rod group are respectively hinged with the box body and the box cover, and two ends of the second connecting rod group are respectively hinged with the box body and the box cover so that the box cover moves between a closing position and a bearing position. According to the technical scheme, the problem that the maintenance efficiency is affected due to the fact that no place is left for materials removed from the power box assembly in the related technology can be effectively solved.

Description

Power supply box assembly and LED display device with same

Technical Field

The utility model relates to the technical field of LED display, in particular to a power box assembly and an LED display device with the same.

Background

In the related art, an LED display device is generally formed by splicing a plurality of LED cases, and the LED cases generally include a case body and a power box assembly disposed at a rear side of the case body, and a power source, a control board, etc. are disposed inside the power box assembly to supply power to the LED cases and transmit control signals.

When the LED display device is maintained, the materials which are detached from the power box assembly and need to be replaced are placed in no place, so that the maintenance is inconvenient, and the maintenance efficiency is affected.

Disclosure of Invention

The utility model mainly aims to provide a power box assembly and an LED display device with the same, so as to solve the problem that materials detached from the power box assembly in the related art are placed everywhere and the maintenance efficiency is affected.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a power box assembly comprising: a case body; the box cover is arranged on the box body in an openable and closable manner and is provided with a cover closing position for closing the box body and a bearing position for opening the box body; the hinge structure is connected between the box body and the box cover and comprises a first connecting rod group and a second connecting rod group which is hinged with the first connecting rod group, two ends of the first connecting rod group are respectively hinged with the box body and the box cover, and two ends of the second connecting rod group are respectively hinged with the box body and the box cover so that the box cover moves between a closing position and a bearing position.

Further, the first connecting rod group comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is hinged with the box body, the second end of the first connecting rod is hinged with the first end of the second connecting rod, and the second end of the second connecting rod is hinged with the box cover; the second connecting rod group comprises a third connecting rod and a fourth connecting rod, the first end of the third connecting rod is hinged with the box body, the second end of the third connecting rod is hinged with the first end of the fourth connecting rod, the second end of the fourth connecting rod is hinged with the box cover, and the middle part of the second connecting rod is hinged with the middle part of the third connecting rod.

Further, the length of the second link is greater than the length of the first link and greater than the length of the fourth link; the length of the third connecting rod is longer than that of the fourth connecting rod and longer than that of the first connecting rod; and/or the structure of the first connecting rod is the same as that of the fourth connecting rod, and/or the structure of the second connecting rod is the same as that of the third connecting rod.

Further, the box body comprises a bottom plate and a coaming which is arranged around the periphery of the bottom plate, the power box assembly further comprises a first connecting part which is arranged on the bottom plate, the first end of the first connecting rod is hinged with the first connecting part, and the first end of the third connecting rod is hinged with the first connecting part; when the lid is located and closes the lid position, lid and bounding wall butt cooperation, power pack subassembly still includes the second connecting portion that sets up on the lid, and the second end and the second connecting portion of second connecting rod are articulated to be connected, and the second end and the second connecting portion of fourth connecting rod are articulated to be connected.

Further, when the box cover is positioned at the bearing position, the first side edge of the box body is adjacent to the second side edge of the box cover; the first connecting part is provided with a first hinge point hinged with the first connecting rod and a second hinge point hinged with the third connecting rod, the second hinge point is arranged close to the first side relative to the first hinge point, and the second hinge point is arranged far away from the bottom plate relative to the first hinge point; the second connecting portion is provided with a third hinging point hinged with the second connecting rod and a fourth hinging point hinged with the fourth connecting rod, the third hinging point is close to the second side edge relative to the fourth hinging point, and the third hinging point is far away from the box cover compared with the fourth hinging point.

Further, the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are all of flat rod structures, the first connecting rod and the third connecting rod are located in the same plane, the second connecting rod and the fourth connecting rod are located in the same plane, and the first connecting rod and the second connecting rod are located in different planes.

Further, the first connecting rod comprises a first rod body section and a second rod body section which are arranged at an obtuse angle, and when the box cover is positioned at the closing position, the connection part of the first rod body section and the second rod body section is arranged towards the bottom plate in a protruding mode.

Further, the second connecting rod comprises a third rod body section and a fourth rod body section which are arranged at an obtuse angle, and when the box cover is positioned at the closing position, the connection part of the third rod body section and the fourth rod body section protrudes towards the direction away from the bottom plate.

Further, the third rod body section is located between the fourth rod body section and the first connecting rod, a fifth hinging point hinged with the third connecting rod on the second connecting rod is located on the fourth rod body section, and the distance between the fifth hinging point and the free end of the fourth rod body section is greater than the distance between the fifth hinging point and the free end of the third rod body section.

According to another aspect of the present utility model, there is provided an LED display device including a power box assembly, the power box assembly being the above-described power box assembly.

By applying the technical scheme of the utility model, the box cover is arranged on the box body in an openable and closable manner, and only the box cover is required to be opened when the power box assembly is required to be maintained. Be provided with hinge structure between lid and the box body, hinge structure can drive the lid and close and remove and can make the lid fix in bearing position between lid position and bearing position, and the lid that is located bearing position can be as the loading platform that is used for supporting the material, maintenance tool, replacement material isotructure taken out from the power pack subassembly, makes things convenient for operating personnel to maintain the operation, and then can improve maintenance efficiency. Specifically, the hinge structure comprises a first connecting rod group and a second connecting rod group, and the two connecting rod groups drive the box cover to move and keep the box cover at a bearing position, so that the hinge structure has the advantage of simple structure. Therefore, the technical scheme of the application can effectively solve the problem that the maintenance efficiency is affected by placing the detached materials in the power box assembly in no place in the related technology.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of a power pack assembly according to the present utility model, wherein the cover is in a carrying position; and

fig. 2 shows an enlarged view at a of the power box assembly of fig. 1;

FIG. 3 is a schematic view of another angle of the power pack assembly of FIG. 1, with the cover in the load-bearing position;

fig. 4 shows an enlarged view at B of the power box assembly of fig. 3;

fig. 5 shows a schematic cross-sectional view of the power pack assembly of fig. 1 with the cover in the closed position.

Wherein the above figures include the following reference numerals:

10. a case body; 11. a bottom plate; 12. coaming plate; 13. a first side; 20. a box cover; 21. a second side; 30. a hinge structure; 31. a first link group; 311. a first link; 3111. a first rod segment; 3112. a second rod segment; 312. a second link; 3121. a third rod segment; 3122. a fourth rod segment; 32. a second link group; 321. a third link; 3211. a fifth rod segment; 3212. a sixth rod segment; 322. a fourth link; 3221. a seventh rod segment; 3222. an eighth rod segment; 41. a first connection portion; 411. a first plate body portion; 412. a second plate body portion; 42. a second connecting portion; 421. a third plate body portion; 422. and a fourth plate body.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 5, the power supply box assembly of the present embodiment includes: a case body 10, a case cover 20 and a hinge structure 30. The box cover 20 is arranged on the box body 10 in an openable and closable manner, and is provided with a cover closing position for closing the box body 10 and a bearing position for opening the box body 10; the hinge structure 30 is connected between the box body 10 and the box cover 20, the hinge structure 30 comprises a first connecting rod group 31 and a second connecting rod group 32 hinged with the first connecting rod group 31, two ends of the first connecting rod group 31 are respectively hinged with the box body 10 and the box cover 20, and two ends of the second connecting rod group 32 are respectively hinged with the box body 10 and the box cover 20, so that the box cover 20 moves between a closing position and a bearing position.

By applying the technical scheme of the embodiment, the box cover 20 is arranged on the box body 10 in an openable and closable manner, and only the box cover 20 needs to be opened when the power box assembly needs to be maintained. Be provided with hinge structure 30 between lid 20 and the box body 10, hinge structure 30 can drive lid 20 and close lid position and bear the weight of the position and remove and can make lid 20 fix and bear the weight of the position, be located the lid 20 that bears the weight of the position and can regard as the load-bearing platform that is used for supporting the material, maintenance tool, replacement material isotructure of taking out from the power pack subassembly, make things convenient for operating personnel to maintain the operation, and then can improve maintenance efficiency. Specifically, the hinge structure 30 includes a first link group 31 and a second link group 32, and drives the box cover 20 to move and keeps the box cover 20 in a bearing position through the two link groups, so that the hinge structure has the advantage of simple structure. Therefore, the technical scheme of the embodiment can effectively solve the problem that the maintenance efficiency is affected by the fact that no place is left for the materials removed from the power box assembly in the related technology.

As shown in fig. 2, 4 and 5, the first link group 31 includes a first link 311 and a second link 312, a first end of the first link 311 is hinged with the case body 10, a second end of the first link 311 is hinged with a first end of the second link 312, and a second end of the second link 312 is hinged with the case cover 20; the second link group 32 includes a third link 321 and a fourth link 322, a first end of the third link 321 is hinged with the box body 10, a second end of the third link 321 is hinged with a first end of the fourth link 322, a second end of the fourth link 322 is hinged with the box cover 20, and a middle part of the second link 312 is hinged with a middle part of the third link 321. The first connecting rod 311, the second connecting rod 312, the third connecting rod 321 and the fourth connecting rod 322 are used for driving the box cover 20 to move between the cover closing position and the bearing position, so that the box cover 20 can be kept at the bearing position, and the box cover has the advantages of being simple in structure and easy to process and manufacture.

Specifically, as shown in fig. 2, 4 and 5, the length of the second link 312 is greater than the length of the first link 311 and greater than the length of the fourth link 322; the length of the third link 321 is greater than the length of the fourth link 322 and greater than the length of the first link 311. The lengths of the four links satisfy the above relationship, so that the hinge structure 30 can drive the box cover 20 to move along a preset track.

In the present embodiment, the structure of the first link 311 is the same as that of the fourth link 322, and the structure of the second link 312 is the same as that of the third link 321. When the connecting rod structure is processed and manufactured, only two types of connecting rod structures are required to be produced, so that the number of required dies is reduced, and the processing cost is reduced.

As shown in fig. 1 to 5, the box body 10 includes a base plate 11 and a surrounding plate 12 surrounding the periphery of the base plate 11, the power box assembly further includes a first connecting portion 41 provided on the base plate 11, a first end of the first connecting rod 311 is hinged with the first connecting portion 41, and a first end of the third connecting rod 321 is hinged with the first connecting portion 41; when the lid 20 is in the lid closing position, the lid 20 and the coaming 12 are in abutting fit, the power supply box assembly further comprises a second connecting portion 42 arranged on the lid 20, a second end of the second connecting rod 312 is hinged to the second connecting portion 42, and a second end of the fourth connecting rod 322 is hinged to the second connecting portion 42. When the box cover 20 is positioned at the cover closing position, a containing space is formed between the box body 10 and the box cover 20, and the structures such as a power supply, a control panel and the like of the LED box body can be placed in the containing space. The hinge structure 30 is connected with the box body 10 through a first connecting part 41 arranged on the bottom plate 11 and is connected with the box cover 20 through a second connecting part 42 arranged on the box cover 20, and when the box body 10 and the box cover 20 are required to be closed, the hinge structure 30 can be positioned in the accommodating space formed by the box body 20 and the box cover 20, so that smooth closing is ensured. The hinge structure 30 can be prevented from being exposed to the outside, so that the overall aesthetic property of the power box assembly is affected, and the function of protecting other structures in the power box assembly can be achieved.

Specifically, in the present embodiment, the lid 20 also includes a bottom plate and a surrounding plate surrounding the bottom plate, and when the lid 20 is in the lid-closing position, the surrounding plate of the lid 20 and the surrounding plate 12 of the box body 10 are in abutting engagement. The first connecting portion 41 includes a first plate body 411 and a second plate body 412 that are disposed at an angle, the first plate body 411 is connected to the bottom plate 11 of the box body 10 by a fastener, the second plate body 412 extends in a direction away from the bottom plate 11 of the box body 10, and the first link 311 and the third link 321 are both pivotally connected to the second plate body 412. The second connecting portion 42 includes a third plate body 421 and a fourth plate body 422 disposed at an angle, the third plate body 421 is connected to the bottom plate of the box cover 20 by a fastener, the fourth plate body 422 extends in a direction away from the bottom plate of the box cover 20, and the second link 312 and the fourth link 322 are both pivotally connected to the fourth plate body 422. This arrangement makes the structure of the first and second connection parts 41 and 42 simpler and makes connection with the case body 10 and the cover 20 easier.

As shown in fig. 2 and 4, when the lid 20 is in the loading position, the first side 13 of the case 10 is disposed adjacent to the second side 21 of the lid 20; the first connection part 41 has a first hinge point hinged with the first link 311 and a second hinge point hinged with the third link 321, the second hinge point being disposed close to the first side 13 with respect to the first hinge point, and the second hinge point being disposed away from the bottom plate 11 with respect to the first hinge point; the second connecting portion 42 has a third hinge point hinged to the second link 312 and a fourth hinge point hinged to the fourth link 322, the third hinge point being disposed closer to the second side 21 than the fourth hinge point, and the third hinge point being disposed farther from the lid 20 than the fourth hinge point. The above-mentioned positional relationship is satisfied between four pin joints for first connecting rod 311 and third connecting rod 321 can set up in the coplanar and the two can not take place to interfere at the in-process of swing, second connecting rod 312 and fourth connecting rod 322 can set up in the coplanar and the two can not take place to interfere at the in-process of swing, have reduced the space that hinge structure 30 occupy under the prerequisite that realizes the function that hinge structure 30 drove lid 20 swing.

Specifically, as shown in fig. 2 and 4, in the present embodiment, the first link 311, the second link 312, the third link 321, and the fourth link 322 are each a flat bar structure, and the first link 311 and the second link 312 are located in different planes. This can further reduce the space occupied by the hinge structure 30, and as shown in fig. 4, the overall thickness of the hinge structure 30 is only the sum of the thicknesses of the first link 311, the second link 312, and the fourth plate body 422.

Correspondingly, as shown in fig. 2 and 4, the second plate body 412 and the fourth plate body 422 are triangular plate bodies, so that the amount of materials used for the first connection portion 41 and the second connection portion 42 can be reduced, and cost can be effectively saved. It is possible to prevent the first connection portion 41 or the second connection portion 42 from interfering with the link structure when the cover 20 is in the closed position, affecting the function of the hinge structure 30.

It should be noted that, the above-mentioned "the second hinge point is disposed close to the first side 13 with respect to the first hinge point" means that the vertical distance between the second hinge point and the plane in which the first side 13 is located is smaller than the vertical distance between the second hinge point and the plane in which the first side 13 is located, and the "the second hinge point is disposed away from the bottom plate 11 with respect to the first hinge point" means that the vertical distance between the second hinge point and the bottom plate 11 is larger than the vertical distance between the second hinge point and the bottom plate 11. The same applies to the positional relationship between the third hinge point and the fourth hinge point, and the description thereof will be omitted.

In this embodiment, the power box assembly has a rectangular parallelepiped structure and is disposed along a transverse direction, the first side 13 is a long side on the box body 10, and the second side 21 is a long side on the box cover 20 corresponding to the first side 13. Of course, in the embodiment not shown in the drawings, the power box assembly may also be placed in a vertical direction, where the first side is a short side on the box body, and the second side is a short side corresponding to the first side on the box cover.

In the present embodiment, the number of the hinge structures 30 is two, and two hinge structures 30 are provided at both ends in the length direction of the first side 13, so that the box cover 20 can be more stably maintained at the carrying position.

As shown in fig. 2, 4 and 5, the first link 311 includes a first rod segment 3111 and a second rod segment 3112 disposed at an obtuse angle, and when the cover 20 is in the closed position, the junction of the first rod segment 3111 and the second rod segment 3112 is disposed protruding toward the base plate 11. In this way, the first link 311 can avoid the structure (hinge pin) at the hinge position between the second link 312 and the third link 321, avoiding interference.

Accordingly, the fourth link 322 includes a seventh rod segment 3221 and an eighth rod segment 3222 disposed at an obtuse angle, and when the lid 20 is in the closed position, the connection between the seventh rod segment 3221 and the eighth rod segment 3222 is disposed protruding toward the bottom plate of the lid 20. In this way, the fourth link 322 can avoid the structure (hinge pin) at the hinge position between the second link 312 and the third link 321, avoiding interference.

In addition, the first link 311 and the fourth link 322 are provided in a bent structure, and the hinge structure 30 can be more stable when the cover 20 is positioned at the loading position.

As shown in fig. 2, 4 and 5, the second link 312 includes a third leg portion 3121 and a fourth leg portion 3122 disposed at an obtuse angle, and a junction of the third leg portion 3121 and the fourth leg portion 3122 is convexly disposed toward a direction away from the base plate 11 when the cover 20 is in the closed position. Correspondingly, the third connecting rod 321 comprises a fifth rod segment 3211 and a sixth rod segment 3212 which are arranged at an obtuse angle, and when the box cover 20 is positioned at the closing position, the connection part of the fifth rod segment 3211 and the sixth rod segment 3212 protrudes towards a direction away from the bottom plate of the box cover 20. The second connecting rod 312 and the third connecting rod 321 are both provided with bending structures, and when the box cover 20 is positioned at the bearing position, the hinge structure 30 can be more stable.

As shown in fig. 2, the third rod segment 3121 is located between the fourth rod segment 3122 and the first link 311, and a fifth hinge point on the second link 312, which is hingedly connected to the third link 321, is located on the fourth rod segment 3122, and a distance between the fifth hinge point and the free end of the fourth rod segment 3122 is greater than a distance between the fifth hinge point and the free end of the third rod segment 3121. The fifth rod segment 3211 is located between the sixth rod segment 3212 and the fourth link 322, and a sixth hinge point on the third link 321, which is hinged to the second link 312, is located on the sixth rod segment 3212, and a distance between the sixth hinge point and a free end of the sixth rod segment 3212 is greater than a distance between the sixth hinge point and the free end of the fifth rod segment 3211. The arrangement is such that the hinge structure 30 can move the lid 20 along a predetermined trajectory (i.e. from the closed position to the loaded position or from the loaded position to the closed position) and such that the lid 20 can be held in the loaded position.

It should be noted that, the "free end of the third rod segment 3121" mentioned above is an end of the third rod segment 3121 away from the fourth rod segment 3122, and the "free end of the fourth rod segment 3122" is an end of the fourth rod segment 3122 away from the third rod segment 3121.

As shown in fig. 5, when the cover 20 is in the closed position, a gap is provided between the first link 311 and the third link 321, and a gap is provided between the second link 312 and the fourth link 322. The above-mentioned clearance is set to avoid the occurrence of the abutment between the link structures of the hinge structure 30 when closing the cover, thereby making it impossible to close the cover, in consideration of the processing error of each link, the assembly error between the first connecting portion 41 and the case body 10, the assembly error between the second connecting portion 42 and the cover 20, and the like.

As shown in fig. 1 and 3, in the present embodiment, when the cover 20 is in the loading position, the case body 10 and the cover 20 are disposed at 90 °. Of course, in other possible embodiments, other angles (for example, 80 °, 100 °, 120 ° and the like) between the case body and the case cover may be formed by changing the size of each link according to the installation environment position of the LED display device and the like.

The application also provides an LED display device, and the embodiment of the LED display device comprises a power box component, wherein the power box component is the power box component. The power box assembly can effectively solve the problem that the maintenance efficiency is affected by the fact that materials detached from the power box assembly in the related art are placed in no place, and the LED display device with the power box assembly also has the advantages.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A power pack assembly, comprising:

a case (10);

the box cover (20) is arranged on the box body (10) in an openable and closable manner and is provided with a cover closing position for closing the box body (10) and a bearing position for opening the box body (10);

the hinge structure (30) is connected between the box body (10) and the box cover (20), the hinge structure (30) comprises a first connecting rod group (31) and a second connecting rod group (32) hinged with the first connecting rod group (31), two ends of the first connecting rod group (31) are respectively hinged with the box body (10) and the box cover (20), and two ends of the second connecting rod group (32) are respectively hinged with the box body (10) and the box cover (20), so that the box cover (20) moves between the closing position and the bearing position.

2. The power pack assembly of claim 1 wherein,

the first connecting rod group (31) comprises a first connecting rod (311) and a second connecting rod (312), the first end of the first connecting rod (311) is hinged with the box body (10), the second end of the first connecting rod (311) is hinged with the first end of the second connecting rod (312), and the second end of the second connecting rod (312) is hinged with the box cover (20);

the second connecting rod group (32) comprises a third connecting rod (321) and a fourth connecting rod (322), wherein the first end of the third connecting rod (321) is hinged to the box body (10), the second end of the third connecting rod (321) is hinged to the first end of the fourth connecting rod (322), the second end of the fourth connecting rod (322) is hinged to the box cover (20), and the middle of the second connecting rod (312) is hinged to the middle of the third connecting rod (321).

3. The power pack assembly of claim 2 wherein,

the length of the second connecting rod (312) is greater than the length of the first connecting rod (311) and greater than the length of the fourth connecting rod (322); the length of the third connecting rod (321) is greater than the length of the fourth connecting rod (322) and greater than the length of the first connecting rod (311); and/or the number of the groups of groups,

the structure of the first connecting rod (311) is the same as that of the fourth connecting rod (322); and/or the number of the groups of groups,

the second connecting rod (312) has the same structure as the third connecting rod (321).

4. A power pack assembly according to claim 2 or 3, wherein,

the power box comprises a box body (10) and a power box assembly, wherein the box body comprises a bottom plate (11) and a coaming (12) which is arranged around the periphery of the bottom plate (11), the power box assembly further comprises a first connecting part (41) which is arranged on the bottom plate (11), a first end of a first connecting rod (311) is hinged with the first connecting part (41), and a first end of a third connecting rod (321) is hinged with the first connecting part (41);

when lid (20) are located close lid position, lid (20) with bounding wall (12) butt cooperation, the power pack subassembly is still including setting up second connecting portion (42) on lid (20), the second end of second connecting rod (312) with second connecting portion (42) are articulated to be connected, the second end of fourth connecting rod (322) with second connecting portion (42) are articulated to be connected.

5. The power pack assembly of claim 4 wherein,

when the box cover (20) is positioned at the bearing position, the first side edge (13) of the box body (10) is adjacent to the second side edge (21) of the box cover (20);

the first connecting part (41) is provided with a first hinging point hinged with the first connecting rod (311) and a second hinging point hinged with the third connecting rod (321), wherein the second hinging point is arranged close to the first side edge (13) relative to the first hinging point, and the second hinging point is arranged far away from the bottom plate (11) relative to the first hinging point;

the second connecting portion (42) is provided with a third hinging point hinged with the second connecting rod (312) and a fourth hinging point hinged with the fourth connecting rod (322), the third hinging point is close to the second side edge (21) relative to the fourth hinging point, and the third hinging point is far away from the box cover (20) compared with the fourth hinging point.

6. A power pack assembly according to claim 2 or 3, wherein the first link (311), the second link (312), the third link (321) and the fourth link (322) are each of a flat bar structure, the first link (311) and the third link (321) are located in the same plane, the second link (312) and the fourth link (322) are located in the same plane, and the first link (311) and the second link (312) are located in different planes.

7. The power pack assembly according to claim 4, wherein the first link (311) comprises a first rod section (3111) and a second rod section (3112) disposed at an obtuse angle, the junction of the first rod section (3111) and the second rod section (3112) being disposed convex toward the base plate (11) when the lid (20) is in the closed position.

8. The power pack assembly according to claim 4, wherein the second link (312) comprises a third leg portion (3121) and a fourth leg portion (3122) disposed at an obtuse angle, the junction of the third leg portion (3121) and the fourth leg portion (3122) being convexly disposed away from the base plate (11) when the lid (20) is in the closed position.

9. The power pack assembly according to claim 8, wherein the third pole segment (3121) is located between the fourth pole segment (3122) and the first link (311), a fifth hinge point on the second link (312) being hingedly connected to the third link (321) is located on the fourth pole segment (3122), a distance between the fifth hinge point and a free end of the fourth pole segment (3122) being greater than a distance between the fifth hinge point and a free end of the third pole segment (3121).

10. An LED display device comprising a power supply box assembly, characterized in that the power supply box assembly is the power supply box assembly according to any one of claims 1 to 9.

Images