CN210606426U

CN210606426U - Lamp panel module and display screen module with same

Info

Publication number: CN210606426U
Application number: CN201921625597.3U
Authority: CN
Inventors: 冯诗柱; 刘明; 孙雪超
Original assignee: Shenzhen Leyard Optoelectronic Co Ltd
Current assignee: Shenzhen Leyard Optoelectronic Co Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-05-22
Anticipated expiration: 2029-09-26

Abstract

The utility model provides a lamp panel module and have its display screen module, wherein, the lamp panel module includes drain pan, lamp plate and charge conduction portion, wherein, is formed with via hole structure on the drain pan; the lamp panel is arranged on the bottom shell; the charge conduction portion penetrates through the position of the via hole structure, the first end of the charge conduction portion is in contact with the lamp panel, and the second end of the charge conduction portion forms a plurality of grounding end heads. The utility model provides a display screen module among the prior art be used for the copper post bullet needle with lamp plate module ground connection easily appear with the bad situation of box contact to lead to the lamp plate module invalid ground connection of appearance and the safety in utilization of unable assurance display screen module, reduced the problem of the practicality of display screen module.

Description

Lamp panel module and display screen module with same

Technical Field

The utility model relates to a display screen technical field particularly, relates to a structural improvement of lamp plate module of display screen module.

Background

The LED display screen is a display device for displaying information such as characters, images, videos, video signals and the like, and is widely applied to places such as markets, high-speed rails, subways, cinemas, exhibitions, office buildings and the like because the LED display screen can be freely extended, seamless splicing is realized, the operation time is long, an interaction technology can be applied, and the display effect is good.

The LED display screen is formed by a plurality of display screen module concatenation usually, and each display screen module all includes box and a plurality of lamp plate module, and the LED display screen belongs to the electrical apparatus, in order to ensure the safety in utilization of LED display screen, sets up charge conduction portion usually between box and lamp plate module to the electric charge that produces on the lamp plate module leads the ground through charge conduction portion.

Among the prior art, lamp plate module uses copper post bullet needle to connect lamp plate module and box usually to realize the ground connection of lamp plate module, and copper post bullet needle appears easily with the bad situation of box contact, thereby lead to the invalid phenomenon of ground connection to appear in the lamp plate module, can't guarantee the work security of lamp plate module, and then reduced the practicality of display screen module.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide a lamp plate module and have its display screen module to the copper post bullet needle that is used for lamp plate module ground connection among the solution prior art easily appears with the bad situation of box contact, thereby leads to the lamp plate module invalid ground connection to appear and can't guarantee the safety in utilization of display screen module, has reduced the problem of the practicality of display screen module.

In order to achieve the above object, according to an aspect of the present invention, there is provided a lamp panel module, including a bottom case, a lamp panel, and a charge conducting portion, wherein a via hole structure is formed on the bottom case; the lamp panel is arranged on the bottom shell; the charge conduction portion penetrates through the position of the via hole structure, the first end of the charge conduction portion is in contact with the lamp panel, and the second end of the charge conduction portion forms a plurality of grounding end heads.

Furthermore, the charge conduction part comprises a charge conduction guide pillar and a charge conduction sheet, wherein the outer wall surface of the charge conduction guide pillar is connected with the inner wall surface of the via hole structure, and the first end of the charge conduction guide pillar is electrically connected with the end surface of the lamp panel facing to one side of the bottom shell; the charge conduction piece comprises a connection piece and a plurality of bending elastic pieces connected with the connection piece, wherein the connection piece is connected with the second end of the charge conduction column, the bending elastic pieces are arranged around the connection piece at intervals in the circumferential direction, and one end, far away from the connection piece, of each bending elastic piece extends out of the via hole structure to form a grounding end.

Furthermore, the surface of the charge conduction column, which faces the charge conduction piece, is provided with an installation screw hole, the connecting piece is provided with an installation through hole corresponding to the installation screw hole, and the charge conduction part further comprises a fastening element which penetrates through the installation through hole and then extends into the installation screw hole, so that the charge conduction piece is detachably fastened and connected with the charge conduction column.

Further, the fastening element is a fastening bolt which comprises a stud and a screw head which are connected, wherein the stud is matched with the mounting screw hole, the charge conduction part further comprises a mounting gasket, and the screw head presses the mounting gasket on the connecting piece.

Further, form the installation cavity between drain pan and the lamp plate, via hole structure is to protruding setting in the installation cavity, and the internal face of via hole structure forms the assembly through-hole, and the assembly through-hole is along dodging hole section and the connecting hole section that is linked together along the direction of keeping away from the drain pan, and dodges the junction of hole section and connecting hole section and form the step face, and wherein, electric charge passes the interior face connection of guide pillar and connecting hole section, connection piece and step face butt, and a plurality of shell fragments of bending stretch out and dodge the hole section.

Further, the charge transfer guide pillar is injection-molded in the connecting hole section when the bottom shell is injection-molded; or the charge transmission guide pillar is in interference fit with the inner wall surface of the connecting hole section.

Further, the charge conduction part further comprises a conductive foam, and the conductive foam is clamped between the end face of the first end of the charge conduction pillar and the end face of the lamp panel facing one side of the bottom shell.

Further, the charge conducting pillar is made of copper, and the charge conducting sheet is made of stainless steel.

Further, be formed with a plurality of via structures on the drain pan, a plurality of via structures set up with interval, and charge conduction portion is a plurality of, and a plurality of charge conduction portions one-to-one sets up in a plurality of via structures department.

According to the utility model discloses an on the other hand provides a display screen module, including box and a plurality of foretell lamp plate module, a plurality of lamp plate modules set up on the box with the mode of concatenation, and each ground connection end and the box contact of the charge conduction portion of each lamp plate module.

Use the technical scheme of the utility model, via hole structure department on the drain pan is worn to establish by the charge conduction portion in the lamp plate module through with the display screen module, wherein, the first end and the lamp plate contact of charge conduction portion, the structural style including a plurality of ground connection end is set to the second end of charge conduction portion, thus, make a plurality of ground connection end contact with the box of display screen module simultaneously, the number of tie point between charge conduction portion and the box has been increased, ensure the reliability of being connected of charge conduction portion and box, avoid appearing contact failure phenomenon between them because of the tie point between charge conduction portion and the box is too few, thereby ensure that the charge that lamp plate module department produced can in time lead-in earth through charge conduction portion and box, guarantee the work safety of lamp plate module, and then improved the practicality of display screen module.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a display screen module according to an alternative embodiment of the present invention;

FIG. 2 shows an enlarged schematic view at A in FIG. 1;

fig. 3 is an exploded schematic view of a lamp panel module of the display screen module in fig. 1;

FIG. 4 is an exploded view of the light panel module of FIG. 3 from another perspective;

FIG. 5 shows a schematic front view of the charge conducting sheet of FIG. 4;

fig. 6 shows a schematic top view of the charge conducting sheet of fig. 5.

Wherein the figures include the following reference numerals:

1. a box body; 2. a lamp panel module; 10. a bottom case; 11. a via structure; 110. avoiding a hole section; 111. a connecting hole section; 20. a lamp panel; 30. a charge conducting portion; 32. a charge transfer post; 320. mounting a screw hole; 33. a charge conducting sheet; 330. connecting sheets; 331. bending the elastic sheet; 3301. mounting a through hole; 34. a fastening element; 340. a stud; 341. a screw head; 35. installing a gasket; 36. conductive foam; 40. a face mask; 100. a mounting cavity; 200. a step surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In order to solve the display screen module among the prior art be used for easily appearing the copper post bullet needle of lamp plate module ground connection with the bad situation of box contact to lead to the lamp plate module to appear the invalid and unable safety in utilization of guaranteeing the display screen module of ground connection, reduced the problem of the practicality of display screen module, the utility model provides a lamp plate module and display screen module, as shown in figure 1 and figure 2, the display screen module includes box 1 and a plurality of above-mentioned and following lamp plate module 2, and a plurality of lamp plate modules 2 set up on box 1 with the mode of concatenation, and each ground connection end and the contact of box 1 of the charge conduction portion 30 of each lamp plate module 2, in order to realize the ground connection of lamp plate module 2.

As shown in fig. 1 and 2, the lamp panel module 2 includes a bottom shell 10, a lamp panel 20 and a charge conducting part 30, wherein a via hole structure 11 is formed on the bottom shell 10; the lamp panel 20 is arranged on the bottom shell 10; the charge conduction part 30 penetrates through the via hole structure 11, a first end of the charge conduction part 30 is in contact with the lamp panel 20, and a plurality of grounding ends are formed at a second end of the charge conduction part 30.

Through wearing to establish the 11 departments of via hole structure on drain pan 10 with the electric charge conduction portion 30 in the lamp plate module of display screen module, wherein, the first end and the lamp plate 20 contact of electric charge conduction portion 30, the structural style including a plurality of ground connection end is set to the second end of electric charge conduction portion 30, thus, make a plurality of ground connection end contact with the box of display screen module simultaneously, the number of tie point between electric charge conduction portion 30 and the box has been increased, ensure the reliability of being connected of electric charge conduction portion 30 and box, avoid appearing the phenomenon of contact failure between them because of the tie point between electric charge conduction portion 30 and the box is too few, thereby ensure that the electric charge that lamp plate module department produced can in time lead-in earth through electric charge conduction portion 30 and box, guarantee the work safety of lamp plate module, and then improved the practicality of display screen module.

As shown in fig. 2, 5 and 6, the charge conducting portion 30 includes a charge conducting pillar 32 and a charge conducting sheet 33, wherein an outer wall surface of the charge conducting pillar 32 is connected to an inner wall surface of the via structure 11, and a first end of the charge conducting pillar 32 is electrically connected to an end surface of the lamp panel 20 facing the bottom shell 10; the charge conducting plate 33 includes a connecting plate 330 and a plurality of bent resilient strips 331 connected to the connecting plate 330, wherein the connecting plate 330 is connected to the second end of the charge conducting pillar 32, the plurality of bent resilient strips 331 are disposed around the connecting plate 330 at intervals in the circumferential direction, and one end of each bent resilient strip 331 away from the connecting plate 330 extends out of the via structure 11 to form a ground terminal. In this way, by providing the charge conduction unit 30 with a structure including the charge conduction posts 32 and the charge conduction pieces 33, the charge conduction unit 30 can be stably and reliably mounted between the bottom case 10 and the lamp panel 20; in addition, set charge conduction piece 33 to the structural style including the connection piece 330 and a plurality of shell fragment 331 of bending that are connected, be convenient for charge conduction piece 33 to be connected with charge conduction guide pillar 32 through connection piece 330, and the one end of keeping away from connection piece 330 of a plurality of shell fragments 331 stretches out via hole structure 11 in order to form the ground connection end, namely the structural style of ground connection end is shell fragment 331 of bending, when having increased the number of the tie point of charge conduction portion 30 and box 1, shell fragment 331 and box 1 elasticity butt of bending, greatly increased the contact stability of charge conduction portion 30 and box 1, guarantee that charge conduction portion 30 and box 1 can contact all the time, ensure that the leakage current that lamp plate 20 produced can in time lead to the earth through charge conduction portion 30 and box 1.

As shown in fig. 2, the surface of the charge conducting pillar 32 facing the charge conducting sheet 33 is provided with an installation screw hole 320, the connecting sheet 330 is provided with an installation via 3301 corresponding to the installation screw hole 320, the charge conducting portion 30 further includes a fastening element 34, and the fastening element 34 passes through the installation via 3301 and then extends into the installation screw hole 320, so that the charge conducting sheet 33 and the charge conducting pillar 32 can be detachably fastened and connected. In this way, when the charge conduction sheet 33 is mounted on the lamp panel module 2, the fastening element 34 only needs to be screwed into the mounting screw hole 320 after passing through the mounting through hole 3301, the operation is convenient and fast, and the mounting stability of the charge conduction sheet 33 can be ensured by the arrangement of the fastening element 34; in addition, when the lamp panel module 2 is maintained, the fastening element 34 only needs to be screwed out from the mounting screw hole 320 through the mounting hole 3301, so that the connection between the charge conduction piece 33 and the charge conduction post 32 is released, and the maintenance convenience of the lamp panel module 2 is improved.

As shown in fig. 2, the fastening element 34 is a fastening bolt, and the fastening bolt includes a stud 340 and a head 341 connected to each other, wherein the stud 340 is engaged with the mounting screw hole 320, the charge conducting portion 30 further includes a mounting pad 35, and the head 341 presses the mounting pad 35 against the connecting piece 330. In this way, the charge conducting piece 33 is matched with the mounting screw hole 320 of the charge conducting pillar 32 through the stud 340 of the fastening element 34, so that the charge conducting piece 33 and the charge conducting pillar 32 can be detachably fastened and connected, in addition, the mounting gasket 35 is arranged to prevent the screw head 341 from directly contacting with the connecting piece 330, and in the process of screwing the fastening element 34 into the mounting screw hole 320 through the screw head 341, the connecting piece 330 is not damaged when the screw head 341 is subjected to an external force.

As shown in fig. 1 and 2, an installation cavity 100 is formed between the bottom shell 10 and the lamp panel 20, the via hole structure 11 protrudes into the installation cavity 100, an assembly through hole is formed on an inner wall surface of the via hole structure 11, the assembly through hole comprises an avoidance hole section 110 and a connection hole section 111 which are communicated with each other along a direction far away from the bottom shell 10, a step surface 200 is formed at a joint of the avoidance hole section 110 and the connection hole section 111, wherein the charge transmission guide pillar 32 is connected with an inner wall surface of the connection hole section 111, the connection sheet 330 is abutted to the step surface 200, and the bending elastic sheets 331 extend out of the avoidance hole section 110. In this way, the via hole structure 11 is arranged in the installation cavity 100 in a protruding manner, so that the space utilization rate of the installation cavity 100 is improved, meanwhile, the via hole structure 11 can be prevented from occupying the installation space between the lamp panel module 2 and the box body 1, and the miniaturization design of the display screen module is facilitated; in addition, by setting the assembly through hole to include the structure form of the avoiding hole section 110 and the connecting hole section 111 which are communicated with each other, it is ensured that the avoiding hole section 110 can provide a sufficient installation space for the charge conducting sheet 33, the arrangement of the connecting hole section 111 improves the adaptability of the via hole structure 11 and the charge conducting pillar 32, and ensures that the outer wall surface of the charge conducting pillar 32 can be connected with the inner wall surface of the connecting hole section 111, and the step surface 200 is formed at the connection position of the avoiding hole section 110 and the connecting hole section 111, when the charge conducting sheet 33 is installed on the lamp panel module 2 through the fastening element 34, the step surface 200 can resist the connecting sheet 330 on the charge conducting sheet 33, so that the plurality of bent elastic sheets 331 are clamped between the step surface 200 and the screw 341, and the installation stability of the charge conducting sheet 33 is ensured.

It should be noted that, in the present application, in order to prevent rainwater from flowing into the mounting cavity 100 through the gap between the outer wall surface of the charge conducting pillar 32 and the inner wall surface of the via hole structure 11 to wet the conductive foam 36 when the LED display screen formed by splicing the display screen modules is used outdoors, preferably, the charge conducting pillar 32 is injection-molded in the connecting hole section 111 when the bottom case 10 is injection-molded; or the charge conducting pillar 32 is interference-fitted with the inner wall surface of the connecting hole section 111.

In order to avoid the damage of the display screen module caused by static electricity, it is preferable that, as shown in fig. 2 to 4, the charge conduction unit 30 further includes a conductive foam 36, and the conductive foam 36 is interposed between an end surface of the first end of the charge conduction pillar 32 and an end surface of the lamp panel 20 facing the bottom chassis 10. Like this, the cotton 36 of electrically conductive bubble weight is lighter, is favorable to the lightweight of display screen module, and the cotton 36 of electrically conductive bubble has the electrostatic protection performance, avoids static to cause the harm to the display screen module effectively, ensures the security of display screen module.

It should be noted that, in the present application, it is considered that the charge conducting pillar 32 is disposed in the connecting hole section 111, and the plurality of bent elastic pieces 331 of the charge conducting piece 33 extend out of the avoiding hole section 110, that is, the charge conducting pillar 32 is located in the installation cavity 100 between the lamp panel module 2 and the box body 1, and the charge conducting piece 33 is exposed outside the lamp panel module 2, so that the charge conducting piece 33 is easily oxidized in a long-term use of the display screen module, and on the premise of ensuring the conductivity of the charge conducting part 30, to avoid the conductivity failure of the charge conducting part 30 due to the oxidation of the charge conducting piece 33, preferably, the charge conducting pillar 32 is made of copper, and the charge conducting piece 33 is made of stainless steel.

In an optional embodiment of the present application, in order to ensure the connection reliability of the lamp panel module 2 and the box body 1, optionally, a plurality of via structures 11 are formed on the bottom case 10, the plurality of via structures 11 are disposed at intervals, the plurality of charge conducting portions 30 are plural, and the plurality of charge conducting portions 30 are disposed at the plurality of via structures 11 in a one-to-one correspondence manner. Like this, lamp plate module 2 is connected through a plurality of charge conduction portions 30 with box 1, and when certain electric conductive property became invalid in a plurality of charge conduction portions 30, all the other charge conduction portions 30 can ensure that lamp plate module 2 and box 1 are still connected electrically, guarantee the safety in utilization of display screen module, have improved the practicality of display screen module.

It should be noted that, in this application, in the outdoor use process of the LED display screen spliced by the display screen module, in order to avoid rainwater flowing into the installation cavity 100 through the installation screw holes 320 and wetting the conductive foam 36 in rainy days, preferably, the installation screw holes 320 are blind holes.

Note that, in this application, the light panel module 2 further includes a cover 40 covering the light panel 20.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lamp plate module which characterized in that includes:

the bottom shell (10), a via hole structure (11) is formed on the bottom shell (10);

the lamp panel (20), the lamp panel (20) is arranged on the bottom shell (10);

the lamp panel (20) is connected with the ground, the charge conduction part (30) are arranged in the through hole structure (11) in a penetrating mode, the first end of the charge conduction part (30) is in contact with the lamp panel (20), and the second end of the charge conduction part (30) forms a plurality of grounding ends.

2. A light panel module according to claim 1, wherein the charge conducting part (30) comprises:

the outer wall surface of the charge transmission guide pillar (32) is connected with the inner wall surface of the via hole structure (11), and the first end of the charge transmission guide pillar (32) is electrically connected with the end surface of the lamp panel (20) facing one side of the bottom shell (10);

the charge conducting piece (33) comprises a connecting piece (330) and a plurality of bent elastic pieces (331) connected with the connecting piece (330), wherein the connecting piece (330) is connected with the second end of the charge conducting post (32), the bent elastic pieces (331) are arranged around the connecting piece (330) at intervals in the circumferential direction, and one end, far away from the connecting piece (330), of each bent elastic piece (331) extends out of the via hole structure (11) to form the grounding end.

3. The light panel module of claim 2, wherein a surface of the charge conducting pillar (32) facing the charge conducting sheet (33) is provided with a mounting screw hole (320), the connecting sheet (330) is provided with a mounting through hole (3301) corresponding to the mounting screw hole (320), the charge conducting portion (30) further includes a fastening element (34), and the fastening element (34) passes through the mounting through hole (3301) and then extends into the mounting screw hole (320), so that the charge conducting sheet (33) and the charge conducting pillar (32) can be detachably fastened and connected.

4. The light panel module of claim 3, wherein the fastening element (34) is a fastening bolt comprising a stud (340) and a head (341) connected to each other, wherein the stud (340) is engaged with the mounting screw hole (320), and the charge conducting part (30) further comprises a mounting gasket (35), and the head (341) presses the mounting gasket (35) against the connecting piece (330).

5. The lamp panel module of claim 2, wherein an installation cavity (100) is formed between the bottom shell (10) and the lamp panel (20), the via hole structure (11) protrudes into the installation cavity (100), an assembly through hole is formed on an inner wall surface of the via hole structure (11), the assembly through hole comprises an avoidance hole section (110) and a connection hole section (111) which are communicated with each other along a direction away from the bottom shell (10), a step surface (200) is formed at a joint of the avoidance hole section (110) and the connection hole section (111), the charge transmission guide pillar (32) is connected with the inner wall surface of the connection hole section (111), the connection piece (330) is abutted to the step surface (200), and the bending elastic pieces (331) extend out of the avoidance hole section (110).

6. The light panel module of claim 5,

the charge conducting pillars (32) are injection-molded in the connecting bore section (111) during injection-molding of the bottom shell (10); or

The charge transmission column (32) is in interference fit with the inner wall surface of the connecting hole section (111).

7. The light panel module of claim 2, wherein the charge conducting unit (30) further comprises a conductive foam (36), and the conductive foam (36) is sandwiched between an end surface of the first end of the charge conducting pillar (32) and an end surface of the light panel (20) facing the bottom housing (10).

8. The light panel module of claim 2, wherein the charge conducting pillars (32) are made of copper and the charge conducting sheet (33) is made of stainless steel.

9. The light panel module of claim 1, wherein a plurality of via structures (11) are formed on the bottom housing (10), the via structures (11) are disposed at intervals, the plurality of charge conduction portions (30) are disposed at the via structures (11) in a one-to-one correspondence manner, and the plurality of charge conduction portions (30) are disposed at the via structures (11).

10. The display screen module is characterized by comprising a box body (1) and a plurality of lamp panel modules according to any one of claims 1 to 9, wherein the lamp panel modules (2) are arranged on the box body (1) in a splicing mode, and each grounding end of a charge conduction part (30) of each lamp panel module (2) is in contact with the box body (1).