Cabinet components and display screen

Abstract

The present invention provides a box assembly and a display screen, the box assembly comprising: more than two profile units, the profile units are arranged in sequence along the width direction of the profile units, wherein one of two adjacent profile units is provided with a guide structure, the guide structure cooperates with the other profile unit so that the two adjacent profile units can be spliced ​​together, and the two adjacent profile units are welded into one at the splicing point. The box assembly provided by the present invention uses the guide structure to align the two profile units during the assembly process, so that a high position accuracy can be ensured between the profile units, and the two aligned profile units are welded into one, which is conducive to ensuring the flatness of the display screen.

Description

Technical Field

[0001] The invention relates to the field of display screens, and in particular to a box assembly and a display screen. Background Art

[0002] The cabinet of LED display screen is usually formed by splicing multiple standard die-cast cabinets, and adjacent standard die-cast cabinets are fixed by fasteners. Due to the use of universal standard die-cast cabinets, the cabinet size is generally small, so the types and quantities of materials will be relatively fragmented and more, with more assembly positions, longer assembly links, and larger assembly deviations. Summary of the invention

[0003] One object of the present invention is to provide a box assembly, which is formed by assembling profile units of larger sizes, thereby reducing the number and types of materials, reducing assembly steps, and improving assembly accuracy.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The technical solution of the present invention provides a box assembly for a display screen, comprising:

[0006] There are more than two profile units, and the profile units are arranged in sequence along the width direction of the profile units, wherein one of the two adjacent profile units is provided with a guide structure, and the guide structure cooperates with the other profile unit so that the two adjacent profile units can be spliced ​​together, and the two adjacent profile units are welded into one at the splicing point.

[0007] According to some technical solutions of the present invention, at least two ends of the width direction of at least part of the profile units are respectively formed with splicing side surfaces, and the splicing side surfaces of adjacent profile units are welded;

[0008] The guide structure is provided on one of the splicing sides of the profile unit, and the guide structure of the profile unit is connected to the splicing side of the adjacent profile unit, so that two adjacent profile units are positioned in the thickness direction and / or length direction of the profile unit.

[0009] According to some technical solutions of the present invention, the guiding structure includes a plug-in portion, and the plug-in portion is provided on one of the splicing sides of the profile unit. The plug-in portion of the profile unit is connected to the splicing side of the profile unit adjacent thereto, so that two adjacent profile units are positioned in the thickness direction and / or length direction of the profile unit.

[0010] According to some technical solutions of the present invention, the plug-in portion includes an insert, and a plurality of the inserts are arranged on one of the splicing sides of the profile unit, and the plurality of the inserts are arranged at intervals along the length direction of the profile unit;

[0011] A plurality of grooves are formed on the other splicing side surface of the profile unit, and the plurality of grooves and the plurality of inserts are arranged one to one. The insert of the profile unit is inserted into the groove of the adjacent profile unit, so that two adjacent profile units are positioned in the length direction of the profile unit.

[0012] According to some technical solutions of the present invention, the profile unit is provided with a first connecting structure, which is used to be connected to the second connecting structure of the display module so that the display module can be assembled on the profile unit, wherein one of the first connecting structure and the second connecting structure is a magnetic structure, and the other is a metal part that can be magnetically connected to the magnetic structure.

[0013] According to some technical solutions of the present invention, each of the profile units includes at least two sub-profiles, and the sub-profiles are arranged side by side along the width direction of the profile unit and welded into one body with the adjacent sub-profiles.

[0014] According to some technical solutions of the present invention, the profile unit has a back panel and a front panel that are relatively positioned and spaced apart, and the spliced ​​side surface connects the back panel and the front panel, so that the back panel, the front panel and the spliced ​​side surface jointly define a storage space that can be used to accommodate electronic control components.

[0015] According to some technical solutions of the present invention, the front plate of each of the profile units is provided with a plurality of first mounting positions for mounting display modules;

[0016] The back plate of each of the profile units is provided with a plurality of second installation positions for installing power supplies and a plurality of third installation positions for installing receiving cards;

[0017] The number of the second installation positions and the number of the third installation positions are respectively smaller than the number of the first installation positions.

[0018] Another object of the present invention is to provide a display screen, comprising: a plurality of display modules;

[0019] In the box assembly described in any of the above technical solutions, the display module is assembled on the profile unit.

[0020] The box assembly provided by the present invention aligns two profile units through a guide structure during the assembly process, so that a high position accuracy can be guaranteed between the profile units. When the two aligned profile units are welded into one, on the one hand, the integrity of the two profile units connected by welding is better, avoiding the risk of loosening and misalignment between the profile units, which is beneficial to ensuring the flatness of the display screen. On the other hand, two adjacent profile units are processed by fusion welding, resistance welding, etc. at the joint, so that the materials of the two adjacent profile units or the materials of the two adjacent profile units and the solder penetrate and fuse together. In this way, reliable and convenient connection and assembly between the profile units can be achieved in a simple way, which ensures the assembly reliability of the profile units and is beneficial to hiding the splicing seams, making the product more beautiful.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0023] Figure 1 It is a schematic diagram of the front structural view of a box assembly according to one embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the rear structural view of a box assembly according to one embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the top structure of a box assembly according to one embodiment of the present invention.

[0026] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of part A shown in FIG.

[0027] Figure 5 yes Figure 3 Schematic diagram of the enlarged structure of part B shown in FIG.

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of a box assembly according to one embodiment of the present invention.

[0029] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of part C shown in FIG.

[0030] Figure 8 yes Figure 6 Schematic diagram of the enlarged structure of part D shown in FIG.

[0031] Fig. 9 It is a schematic diagram of the three-dimensional structure of a box assembly according to one embodiment of the present invention.

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of a box assembly according to one embodiment of the present invention.

[0033] Fig.11 It is a schematic diagram of the front structural view of a box assembly according to one embodiment of the present invention.

[0034] Fig.12 It is a schematic diagram of the partial structure of the box assembly according to one embodiment of the present invention.

[0035] Fig.13 It is a partial structural schematic diagram of a box assembly according to one embodiment of the present invention.

[0036] The following are the descriptions of the reference numerals:

[0037] Box assembly 10, profile unit 100, sub-profile 100a, sub-profile 100b, splicing side 110, groove 112, convex part 113, convex wall 1131, avoidance space 1132, limiting edge 114, back plate 120, second installation position 121, third installation position 122, wire passing structure 123, front plate 130, first installation position 131, accommodating space 140, insert 150, magnetic attraction structure 170, length direction L, thickness direction T, width direction W. DETAILED DESCRIPTION

[0038] Although the present invention can be easily embodied in different forms of embodiments, only some of the specific embodiments are shown in the drawings and will be described in detail in this specification. It should be understood that this description should be regarded as an exemplary illustration of the principles of the invention and is not intended to limit the invention to that described herein.

[0039] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0040] In the embodiments shown in the drawings, the indications of directions (such as up, down, inside, outside, left, right, front, back, etc.) used to explain the structure and movement of various components of the present invention are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, the indications of these directions also change accordingly.

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present invention will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0042] The preferred embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of this specification.

[0043] like Figure 1 , Figure 2 and Fig. 9 As shown, an embodiment of one aspect of the present invention provides a box assembly 10, and the box assembly 10 is used for a display screen. More specifically, the box assembly 10 can be used to assemble a display module for display.

[0044] The box assembly 10 includes more than two profile units 100, and the profile units 100 are arranged in sequence along the width direction W of the profile unit 100. For example, the profile unit 100 is a long strip of aluminum profile, which has better linear accuracy in its extension direction than a die-cast box, is relatively difficult to bend and deform, and is conducive to ensuring the linearity of the box assembly 10 in its extension direction, thereby ensuring the assembly accuracy of the display module and improving the display effect.

[0045] One of two adjacent profile units 100 is provided with a guide structure, and the guide structure cooperates with the other profile unit so that the two adjacent profile units can be spliced ​​together, and the two adjacent profile units are welded into one at the splicing position.

[0046] The box assembly 10 provided by the present invention aligns the two profile units 100 through the guide structure during the assembly process, so that a high position accuracy can be guaranteed between the profile units 100. When the two aligned profile units 100 are welded into one, on the one hand, the integrity of the two profile units 100 connected by welding is better, avoiding the risk of loosening and misalignment between the profile units 100, which is beneficial to ensuring the flatness of the display screen. On the other hand, the two adjacent profile units 100 are processed by fusion welding, resistance welding, etc. at the joint, so that the materials of the two adjacent profile units 100 or the materials of the two adjacent profile units 100 and the solder penetrate and fuse together. In this way, reliable and convenient connection and assembly between the profile units 100 can be achieved in a simple way, which ensures the assembly reliability of the profile units 100 and is beneficial to hiding the splicing seams, making the product more beautiful.

[0047] In some embodiments, at least part of the profile units 100 are formed with joint side surfaces 110 at both ends in the width direction W, and the joint side surfaces 110 of adjacent profile units 100 are welded. In this way, the joint surface between two adjacent profile units 100 avoids the front and back sides of the profile units 100, ensuring reliable jointing while having better flatness of the front and back sides of the profile units 100, thereby improving the appearance of the product and facilitating the installation of the display module.

[0048] Furthermore, a guide structure is provided on a splicing side surface 110 of the profile unit 100, and the guide structure of the profile unit 100 is connected to the splicing side surface 110 of the adjacent profile unit 100, so that two adjacent profile units 100 are positioned in the thickness direction T of the profile unit 100, or two adjacent profile units 100 are positioned in the length direction L of the profile unit 100, or two adjacent profile units 100 are positioned in both the thickness direction T and the length direction L of the profile unit 100. Thus, the flatness of the two adjacent profile units 100 in the thickness direction T of the profile unit 100 and the neatness of the two adjacent profile units 100 in the length direction L of the profile unit 100 are ensured, the risk of splicing misalignment is reduced, and the plane accuracy of the display screen is ensured, and the display effect is improved.

[0049] Furthermore, the guide structure includes a plug-in portion, and a splicing side surface 110 of the profile unit 100 is provided with the plug-in portion, and the plug-in portion of the profile unit 100 is connected to the splicing side surface 110 of the adjacent profile unit 100, so that the two adjacent profile units 100 are positioned in the thickness direction T and / or the length direction L of the profile unit 100. The plug-in method realizes a hidden connection between two adjacent profile units 100, reduces the width of the splicing seam, and further beautifies the appearance of the product. The plug-in method also has a certain pre-fixing effect, realizes the preliminary fixation between the profile units 100, and facilitates the subsequent welding operation.

[0050] In some specific embodiments, Fig.10 , Fig.11 , Fig.12 and Fig.13As shown, the plug-in portion includes an insert 150, and a plurality of inserts 150 are arranged on one splicing side surface 110 of the profile unit 100, and the plurality of inserts 150 are arranged at intervals along the length direction L of the profile unit 100. A plurality of grooves 112 are formed on the other splicing side surface 110 of the profile unit 100, and the plurality of grooves 112 and the plurality of inserts 150 are arranged one-to-one. The insert 150 of the profile unit 100 is inserted into the groove 112 of the adjacent profile unit 100, so that the two adjacent profile units 100 are positioned in the length direction L of the profile unit 100. In this way, each insert 150 and the corresponding groove 112 are positioned opposite to each other, and the insert 150 is inserted into the groove 112 positioned opposite to each other, so that the two ends of the profile unit 100 in the length direction L can be kept flush with the adjacent profile unit 100, thereby ensuring the neatness of the two adjacent profile units 100 in the length direction L. The design of multiple inserts 150 further reduces the risk of misalignment of two adjacent profile units 100 in the length direction L, making product assembly simpler and more accurate.

[0051] Optionally, the insert 150 is disposed on the splicing side surface 110 and can be removed from the splicing side surface 110. For example, the insert 150 is assembled to the splicing side surface 110 by means of fasteners, snap-fitting, adhesive connection, welding, etc. In this way, the insert 150 can be assembled on the profile unit 100 as an independent component, which simplifies the structure of the profile unit 100 and reduces the processing difficulty and processing cost.

[0052] Of course, in other embodiments, a partial area of ​​the splicing side 110 may be designed to protrude outward to form an insert 150. In this way, the insert 150 is directly constructed by processing the splicing side 110, which is beneficial for ensuring the position accuracy of the insert 150 and improving the positioning accuracy of the insert 150, while realizing an integrated design of the insert 150 and the splicing side 110, further reducing the assembly steps of the product.

[0053] In other specific embodiments, Figure 3 , Figure 4As shown, the plug-in portion includes a convex portion 113, and one splicing side surface 110 of the profile unit 100 is formed with the convex portion 113 protruding outward, and the other splicing side surface 110 of the profile unit 100 is formed with two limiting edges 114, and the two limiting edges 114 have a spacing in the thickness direction T of the profile unit 100. The convex portion 113 of the profile unit 100 extends between the two limiting edges 114 of the adjacent profile unit 100 and is limited by the two limiting edges 114, so that the two adjacent profile units 100 are positioned in the thickness direction T of the profile unit 100. In this way, the two limiting edges 114 stop and limit the convex portion 113 from both sides of the convex portion 113, so that the profile unit 100 can be kept flush with the adjacent profile unit 100 on the front and rear sides, ensuring the flatness of the two adjacent profile units 100 in the thickness direction T, thereby ensuring the assembly flatness of the display module and improving the display effect.

[0054] Furthermore, the limiting edge 114 and the protrusion 113 are respectively extended along the length direction L of the profile unit 100, so that the limiting edge 114 and the protrusion 113 are respectively structures extending continuously along the length direction L, which further improves the assembly accuracy and corrects and maintains the flatness between the profile units 100 to a certain extent.

[0055] Of course, the above is only a preferred embodiment of the present invention. In other embodiments, the limiting edge 114 and the protrusion 113 can be designed as a discontinuous structure along the length direction L, or one of the limiting edge 114 and the protrusion 113 can be designed as a structure that extends continuously along the length direction L, and the other can be designed as a structure that is discontinuous along the length direction L. Similarly, the flatness between the profile units 100 can be corrected and maintained.

[0056] It is worth noting that the above two specific embodiments do not conflict with each other. In some specific embodiments, an insert 150 and a convex portion 113 are provided on the same profile unit 100. More preferably, the limiting edge 114 and the insert 150 are located on the same splicing side surface 110 of the profile unit 100, and the convex portion 113 and the groove 112 are located on the other splicing side surface 110 of the profile unit 100, so that two adjacent profile units 100 are embedded in each other and connected to form an interlocking structure, which is not easy to be misaligned or loose, and the positioning is more accurate.

[0057] Furthermore, the convex portion 113 includes two convex walls 1131, which are opposite to each other and spaced apart in the thickness direction T of the profile unit 100, and an escape space 1132 is defined between the two convex walls 1131. When the two convex walls 1131 extend between the two limiting edges 114, the insert 150 is inserted into the groove 112 through the escape space 1132. In this way, while satisfying the positioning, the insert 150 can be inserted deeper into the groove 112 through the escape space 1132, and the positioning is more accurate.

[0058] Alternatively, if Figure 6 and Figure 7 As shown, the cross section of the convex wall 1131 is bent, which improves the strength of the convex wall 1131 and avoids the risk of deformation and breakage of the convex wall 1131. In addition, the two convex walls 1131 are bent toward each other, which is conducive to increasing the contact surface between the convex wall 1131 and the limiting edge 114 and improving the positioning accuracy.

[0059] In some embodiments, the profile unit 100 is provided with a first connection structure, and the first connection structure is used to connect with the second connection structure of the display module, so that the display module can be assembled on the profile unit 100, wherein one of the first connection structure and the second connection structure is a magnetic attraction structure 170, and the other is a metal part that can be magnetically connected to the magnetic attraction structure 170. Compared with the existing display module and the box body through the mutual attraction of two magnets, the present embodiment uses the mutual attraction of the magnetic attraction structure 170 and the metal part, which ensures the reliable connection between the display module and the box body, and appropriately reduces the attraction force, thereby reducing the risk of the display module being smashed due to the large magnetic attraction force during the assembly process.

[0060] In certain embodiments, such as Figure 5 and Figure 8 As shown, each profile unit 100 includes at least two sub-profiles, which are arranged side by side along the width direction W of the profile unit 100 and welded to the adjacent sub-profiles to form a whole.

[0061] For details, please refer to Figure 1 For understanding, the profile unit 100 includes a sub-profile 100a and a sub-profile 100b, and the sub-profile 100a and the sub-profile 100b are welded to form an integral profile unit 100, and the two profile units 100 are spliced ​​into a box assembly 10. In this way, the arrangement order between the sub-profiles is consistent with the arrangement order between the profile units 100, and the length of the sub-profile can be processed and cut according to the size requirements of the display screen, and there is no need to assemble it in the length direction L, which reduces the risk of assembly misalignment and helps to ensure the straightness and flatness of the box assembly 10 in the length direction L.

[0062] The sub-profiles are arranged in sequence in the transverse direction and welded together to expand the transverse size of the profile unit 100. In this way, a larger profile unit 100 can be assembled using multiple relatively small sub-profiles. For display screens of the same size, the large-sized profile unit 100 can reduce the number of profile units 100 required for assembly. This is beneficial for reducing the number and types of materials for on-site assembly and welding, as well as reducing assembly steps, reducing assembly errors, and improving assembly accuracy.

[0063] Moreover, compared with large-sized sub-profiles, relatively small-sized sub-profiles have lower processing difficulty and are easier to ensure processing accuracy. This embodiment reduces the processing difficulty and processing cost of the sub-profile while achieving the expansion of the size of the profile unit 100, thereby ensuring the processing accuracy of the sub-profile, and making the relatively small-sized sub-profile have better linear accuracy and planar accuracy, thereby further reducing assembly errors and improving assembly accuracy.

[0064] For example, the sub-profile is a metal extruded profile. For a more detailed example, the sub-profile is an aluminum extruded profile, which has the advantages of light weight, high strength, not easy to deform and low cost. Such a sub-profile formed in one piece by extrusion is relatively not easy to deform or bend, and has better straightness and flatness, which is beneficial to ensure the assembly accuracy of the display module in the length direction L, and reduce the risk of dislocation and unevenness of the display module in the length direction L.

[0065] In some embodiments, the profile unit 100 has a back panel 120 and a front panel 130 that are relatively positioned and spaced apart, and the spliced ​​side surface 110 connects the back panel 120 and the front panel 130, so that the back panel 120, the front panel 130 and the spliced ​​side surface 110 jointly define a receiving space 140 that can be used to accommodate electronic control components. In this way, on the one hand, the connection between the back panel 120 and the front panel 130 is achieved through the spliced ​​side surface 110, and the overall strength of the profile unit 100 is improved, and the risk of deformation and bending of the profile unit 100 is reduced. On the other hand, the receiving space 140 can also be used to assemble electronic control components such as power supplies and receiving cards, so that the internal layout is more compact and the product is more integrated.

[0066] In more detail, the profile unit 100 formed by splicing multiple sub-profiles has a larger width, and thus its accommodating space 140 is larger, and various types of electronic control components can be arranged more flexibly inside. Especially for LED display screens with small dot pitch, the larger accommodating space 140 is conducive to reducing the density of electronic control components therein, and the wiring between the components is also more convenient, and it has a good heat dissipation effect.

[0067] Furthermore, the front plate 130 of each profile unit 100 is provided with a plurality of first mounting positions 131 for mounting display modules, and the back plate 120 of each profile unit 100 is provided with a plurality of second mounting positions 121 for mounting power supplies and a plurality of third mounting positions 122 for mounting receiving cards, wherein the number of the second mounting positions 121 and the number of the third mounting positions 122 are respectively less than the number of the first mounting positions 131. Compared with the existing solution of configuring a power supply and a receiving card for each display module, this embodiment optimizes the quantitative relationship between the display module, the receiving card and the power supply, further reduces the density of the electric control components therein, avoids the situation where the electrical performance is too redundant, and achieves energy saving and material reduction.

[0068] The present invention further provides a display screen, comprising: two or more display modules and a box assembly 10 according to any one of the above embodiments, wherein the display modules are assembled on a profile unit 100 .

[0069] For example, a plurality of magnetic structures 170 are disposed on the front plate 130 of the profile unit 100 , and the display module and the magnetic structures 170 are magnetically connected to be assembled on the front plate 130 .

[0070] Furthermore, the display screen is a small dot pitch LED display screen, and its LED dot pitch is P2.5 and below, such as P2.5, P2.083, P1.923, P1.8, P1.667, P1.5, P1.25, P1.0 and other LED display screen products.

[0071] For example, the display screen is a small-pitch LED conference screen.

[0072] In terms of power supply and signal connection of the display module, the module box with small dot pitch requires more connections and coordination than the module box with large dot pitch, and the corresponding number of terminals per unit area is relatively large, and the density is relatively high. The profile unit 100 of this embodiment has a larger width, and thus its accommodating space 140 is larger, and various types of electronic control components can be arranged more flexibly inside. Especially for LED display screens with small dot pitch, the larger accommodating space 140 is conducive to reducing the density of electronic control components therein and improving heat dissipation.

[0073] Although the present application has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present application can be implemented in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A box assembly for a display screen, characterized in that: include: Two or more profile units, the profile units are arranged in sequence along the width direction of the profile units, wherein: One of the two adjacent profile units is provided with a guide structure, and the guide structure cooperates with the other profile unit so that the two adjacent profile units can be spliced ​​together, and the two adjacent profile units are welded into one at the splicing position; At least two ends of the width direction of at least part of the profile units are respectively formed with splicing side surfaces, and the splicing side surfaces of adjacent profile units are welded; The guide structure is provided on one of the splicing sides of the profile unit, and the guide structure of the profile unit is connected to the splicing side of the adjacent profile unit, so that two adjacent profile units are positioned in the thickness direction and the length direction of the profile unit; The guide structure includes an inserting portion, and the inserting portion is provided on one of the splicing sides of the profile unit, and the inserting portion of the profile unit is connected to the splicing side of the adjacent profile unit, so that two adjacent profile units are positioned in the thickness direction and the length direction of the profile unit; The plug-in portion includes an insert, and a plurality of the inserts are arranged on one of the splicing sides of the profile unit, and the plurality of the inserts are arranged at intervals along the length direction of the profile unit; A plurality of grooves are formed on the other splicing side surface of the profile unit, and the plurality of grooves and the plurality of inserts are arranged one to one, and the insert of the profile unit is inserted into the groove of the adjacent profile unit, so that two adjacent profile units are positioned in the length direction of the profile unit; The plug-in portion includes a convex portion, one of the splicing side surfaces of the profile unit is formed with the convex portion protruding outward, the other splicing side surface of the profile unit is formed with two limiting edges, the two limiting edges are spaced apart in the thickness direction of the profile unit, the convex portion of the profile unit extends between the two limiting edges of the adjacent profile unit and is limited by the two limiting edges, so that the two adjacent profile units are positioned in the thickness direction of the profile unit; The convex portion includes two convex walls, which are located opposite to each other and spaced apart in the thickness direction of the profile unit, and an escape space is defined between the two convex walls. When the two convex walls extend between the two limiting edges, the insert is inserted into the groove through the escape space. The cross section of the convex wall is bent; the two convex walls are bent toward each other; The insert is detachably arranged on the splicing side surface; Each of the profile units comprises at least two sub-profiles, the sub-profiles are arranged side by side along the width direction of the profile unit and are welded to the adjacent sub-profiles to form a whole; The profile unit has a back plate and a front plate that are opposite and spaced apart, and the spliced ​​side surface connects the back plate and the front plate, so that the back plate, the front plate and the spliced ​​side surface jointly define a storage space that can be used to store electronic control components; The front plate of each profile unit is provided with a plurality of first mounting positions for mounting display modules; The back plate of each of the profile units is provided with a plurality of second installation positions for installing power supplies and a plurality of third installation positions for installing receiving cards; The number of the second installation positions and the number of the third installation positions are respectively smaller than the number of the first installation positions.

2. The box assembly according to claim 1, characterized in that: The profile unit is provided with a first connecting structure, which is used to be connected to the second connecting structure of the display module so that the display module can be assembled on the profile unit, wherein one of the first connecting structure and the second connecting structure is a magnetic structure, and the other is a metal part that can be magnetically connected to the magnetic structure.

3. A display screen, characterized in that: include: Several display modules; According to any one of claims 1 to 2, the display module is assembled on the profile unit.

Images