A concave-convex background wall

Abstract

The present invention relates to the technical field of assembled background walls, and particularly to a concave-convex background wall. It includes a background wall board and a connection structure for installing the background wall board to a wall. The background wall board includes a main board and a secondary board that are parallel to each other. The main board is provided with a TV installation hole. The connection structure includes a support assembly for connecting the main board to the wall and a wall-attaching assembly for connecting the secondary board to the wall. The wall-attaching assembly includes a trimming installation piece. The trimming installation piece includes a connecting plate connected to the wall and a secondary insertion plate connected to the connecting plate. The end of the secondary board is provided with a secondary groove into which the secondary insertion plate can be inserted. In this application, a concave-convex shaped background wall is provided, in which the main board in the middle part protrudes from the wall, facilitating the installation of the TV. The secondary boards on both sides are tightly attached to the wall for installation, avoiding the problem of the secondary boards occupying the decoration space meaninglessly while ensuring the integrity of the background wall.

Description

Technical Field

[0001] The invention relates to the technical field of assembled background walls, and in particular to a concave-convex background wall. Background Art

[0002] Background wall has good decorative effect on the wall, and can also play a role in protecting the wall, which is deeply loved by people. The traditional background wall is a kind of home decoration art that decorates the family living room TV, sofa, entrance, bedroom, etc. With its novel conception and advanced technology, it not only meets the decoration needs of consumers, but also reflects the owner's unique artistic aesthetic style, making it a perfect combination of business and art.

[0003] Traditional background walls are made by adding wood strips and base boards to create an overhead layer. First, the wood strips need to be treated with fireproofing and anti-corrosion, and then the base layer is leveled with wood strips, and then the base board is sealed to create an overhead layer on the wall. This method is cumbersome to install, time-consuming and labor-intensive, and tests the manual ability of on-site craftsmen, which is not conducive to prefabricated decoration; some background walls are mostly integral structures, which are very inconvenient to transport and disassemble. Integral background walls are not convenient to replace, and the existing background walls are mostly decorative and have relatively single functions, which cannot meet people's needs; when the background wall needs to hang a large board, the base layer is often built in the form of a welded steel frame. This method has high labor and material costs, and requires special workers to carry out construction. It is difficult to customize and it is difficult to meet the needs of the owner.

[0004] The patent document with publication number CN113266119A discloses such an assembled large-panel TV background wall, which is characterized by comprising a back structure, a large-panel ceramic and a frame assembly; the back structure and the large-panel ceramic are both arranged in the frame and arranged from back to front. The back structure is used to fix the background wall on the wall on one hand, and to connect the large-panel ceramic on the other hand.

[0005] In this application, the background wall is entirely on the same vertical plane, and the setting of the back structure creates a large distance between the background wall and the wall. After installing this background wall, a portion of the customer's living room will be meaninglessly occupied by the background wall, making it impossible to effectively utilize the decoration space. Summary of the invention

[0006] The present invention aims to solve the above problems and provides a concave-convex background wall.

[0007] The technical solution for the present invention to solve the problem is to provide a concave-convex background wall, which includes a background wall board and a connection structure for installing the background wall board to a wall. The background wall board includes a main board and a secondary board that are parallel to each other, and the main board is provided with a TV installation hole. The connection structure includes a support assembly for connecting the main board to the wall and a wall-attaching assembly for connecting the secondary board to the wall. The wall-attaching assembly includes a trimming installation piece, and the trimming installation piece includes a connecting plate connected to the wall and a secondary insertion plate connected to the connecting plate. The end of the secondary board is provided with a secondary groove into which the secondary insertion plate can be inserted.

[0008] Preferably, the connecting plate is connected to the wall through a leveling piece. The leveling piece includes a plurality of keels and adjustment screws for connecting the keels and the wall. The adjustment screws include heads and screw rod parts for being driven into the wall, and the heads are provided with external threads. The keels are provided with at least two threaded adjustment holes along their length directions. The threaded adjustment holes include through hole parts through which the screw rod parts can pass and internal thread parts that can be threadedly connected to the heads. The connecting plate is arranged on the keels, and the secondary board abuts against the keels.

[0009] Preferably, the support assembly includes a first fixing piece connected to the wall and a first adjusting piece connected to the main board. The first fixing piece is provided with a first insertion groove, and the first adjusting piece includes a first insertion strip for inserting into the first insertion groove in a direction non-parallel to the wall.

[0010] Preferably, friction lines are provided on the inner wall of the first insertion groove and / or the outer wall of the first insertion strip.

[0011] Preferably, the first adjusting piece further includes a main insertion plate connected to the first insertion strip and parallel to the wall. The end of the main board is provided with a main groove into which the main insertion plate can be inserted.

[0012] Preferably, the support assembly further includes a leveling piece. The leveling piece includes a plurality of base plates. The base plates are arranged between adjacent first adjusting pieces, and the base plates abut against the main board.

[0013] As a preference of the present invention, the main board includes an upper sub-board, a lower sub-board and two edge boards, and a TV mounting hole is formed among the upper sub-board, the lower sub-board and the two edge boards; the connecting structure further includes a receiving component for receiving the upper sub-board, the receiving component includes a second fixing member and a second adjusting member, the second fixing member is connected to the wall body, and the second fixing member is provided with a second insertion slot, the second adjusting member includes a second insertion bar for inserting into the second insertion slot along a direction non-parallel to the wall body, and a receiving board connected to the second insertion bar, the receiving board is parallel to the wall body, and the lower end surface of the upper sub-board abuts against the receiving board.

[0014] As a preference of the present invention, a sealing frame is arranged in the TV mounting hole, and the sealing frame includes an edge board abutting against the receiving board.

[0015] As a preference of the present invention, main grooves are respectively arranged at two ends of the upper sub-board and the lower sub-board, a main groove is arranged at one end of the edge board, and a side board is vertically arranged at the other end; the connecting structure further includes a stop block arranged on the wall body, and the side board abuts against the stop block.

[0016] As a preference of the present invention, the background wall board further includes a side sealing board arranged between the main board and the secondary board, one end of the side sealing board abuts against the edge board, and the other end abuts against the secondary board.

[0017] Advantages of the present invention:

[0018] 1. In the present application, a concave-convex background wall is provided, wherein the main board in the middle part protrudes from the wall body, which is convenient for the installation of the TV, so as to ensure that the TV plane is flush with the main board or closer to the wall body relative to the main board, thereby achieving the purpose of protecting the TV; the secondary boards on both sides thereof are tightly attached to the wall body for installation, on the basis of ensuring the integrity of the background wall, avoiding the problem that the secondary boards occupy the decoration space meaninglessly.

[0019] 2. In the present application, the secondary board is tightly attached to the wall body by using a trimming mounting member, on the basis of ensuring the installation strength of the secondary board, avoiding the problem that the installation structure is exposed outside the background wall and affecting the integrity of the background wall.

[0020] 3. In the present application, the main board is installed on the wall body by using a supporting component, and the depth of the first adjusting member inserted into the first fixing member in the supporting component can be adjusted. On the basis of achieving the purpose of connecting the main board and the wall body, it not only has a leveling function, so that it is no longer necessary to install a leveling keel, avoiding the problems of large material consumption and large occupied area brought by the leveling keel; at the same time, the distance between the main board and the wall body can also be adjusted to adapt to the installation of TVs with different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a concave-convex background wall;

[0022] Figure 2 is an exploded view of the structure of a concave-convex background wall;

[0023] Figure 3 is Figure 1 the enlarged view at position A in

[0024] Figure 4 is Figure 1 the enlarged view at position B in

[0025] Figure 5 is Figure 1 the enlarged view at position C in

[0026] Figure 6 is Figure 2 the enlarged view at position D in

[0027] In the figure: main board 1, TV mounting holes 10, upper sub-board 101, lower sub-board 102, two edge boards 103, secondary board 2, side sealing board 3, edge mounting parts 41, connecting plates 411, secondary insertion boards 412, keels 42, through-hole parts 421, internal thread parts 422, first fixing parts 51, first insertion grooves 511, first adjusting parts 52, first insertion strips 521, main insertion boards 522, base boards 531, second fixing parts 61, second insertion grooves 611, second adjusting parts 62, second insertion strips 621, and receiving boards 622. Specific Embodiments

[0028] The following are specific embodiments of the present invention, and in conjunction with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0029] A concave-convex background wall includes a background wall board and a connection structure for mounting the background wall board to an original wall.

[0030] During installation, it is first preferably to pre-treat the original wall, that is, to coat a waterproof and fireproof coating on the original wall, such as a penetrating silicate-based protective coating. Preferably, a penetrating silicate-based protective coating that has been modified with nano waterproofing and organic-inorganic modification is used, so as to achieve the protection of the cement matrix of the original wall through brushing and effectively improve the fire and water resistance of the original wall.

[0031] Such as Figure 1 and Figure 2As shown, in the present application, the background wall panel includes a main board 1 and a secondary board 2 that are parallel to each other. The main board 1 serves as the main TV background board and is provided with a TV mounting hole 10, while the secondary board 2 serves as a decorative board. In actual decoration, generally, the TV is installed in the center. Therefore, the background wall panel includes a main board 1 and two secondary boards 2 respectively arranged on both sides of the main board 1. In the present application, considering the thickness of the TV and the occupied area of the background wall panel, the main board 1 is farther away from the wall than the secondary board 2, so that the main board 1 and the secondary board 2 together form a concave-convex structure. At the same time, since the main board 1 and the secondary board 2 are not in the same plane, there is a gap between the main board 1 and the secondary board 2. Therefore, a side sealing board 3 is usually designed between the main board 1 and the secondary board 2 to close the gap.

[0032] Among them, since a TV mounting hole 10 needs to be designed in the middle of the main board 1, in order to avoid problems such as material waste and poor cutting accuracy caused by the traditional hole-cutting process, the main board 1 of the present application is composed of several sub-boards spliced together. Specifically, the main board 1 includes several upper sub-boards 101, several lower sub-boards 102 and two edge-sealing boards 103. A TV mounting hole 10 is formed between the upper sub-boards 101, the lower sub-boards 102 and the two edge-sealing boards 103. At the same time, it is preferably to provide a sealing frame 7 on the hole wall of the TV mounting hole 10 to prevent dust from entering the splicing gaps between these sub-boards. That is, the sealing frame 7 includes four side boards, which are respectively in contact with the lower end surface of the upper sub-board 101, the upper end surface of the lower sub-board 102, and the side end surfaces of the two edge-sealing boards 103 respectively. When in use, after the main board 1 is installed, the sealing frame 7 can be inserted into the TV mounting hole 10. The secondary board 2 does not need to be drilled and can be directly made of a whole large board or composed of several sub-boards spliced together. In the present application, a whole large board is used as the secondary board 2.

[0033] In order to install the main board 1 and the secondary board 2 respectively, the connection structure includes a support component for connecting the main board 1 to the wall and a wall-attaching component for connecting the secondary board 2 to the wall.

[0034] Among them, in the existing process, if the secondary board 2 needs to be installed against the wall, usually the screw installation method is adopted. Not only does it have the problem that the screw head is exposed outside and is easy to hook users or objects and cause injuries, but it is also not beautiful. At the same time, it is not convenient for the disassembly and replacement of the secondary board 2. In the present application, as Figure 3As shown, in order to avoid the above-mentioned problems, the wall-mounted component includes an edge trimming mounting member 41, and the edge trimming mounting member 41 includes a connecting plate 411 connected to the wall. The connecting plate 411 is fixedly connected to the wall by screws, so a nail groove for accommodating the screw head can also be provided on the connecting plate 411; at the same time, the edge trimming mounting member 41 also includes a secondary insertion plate 412 connected to the connecting plate 411 by an extension plate. Based on this structure, a secondary groove for inserting the secondary insertion plate 412 is provided at the end of the secondary plate 2, so that the secondary plate 2 can be installed on the wall through the edge trimming mounting member 41. Considering that the setting of the connecting plate 411 will cause a gap between the secondary plate 2 and the wall, the middle part of the secondary plate 2 cannot be supported and is easily collapsed by external force. Therefore, a semi-groove for accommodating the connecting plate 411 is provided on the side of the secondary plate 2 close to the wall. When the secondary plate 2 is plugged into the edge trimming mounting piece 41, the connecting plate 411 of the edge trimming mounting piece 41 is just inserted into the semi-groove, so that the back side of the secondary plate 2 is flush with the back side of the connecting plate 411, so that the secondary plate 2 can be attached to the wall to obtain support from the wall.

[0035] Generally, the bottom end of the secondary board 2 is directly against the ground, so it is only necessary to open secondary grooves at the left and right ends of the secondary board 2 and install them on the wall through the edge trimming mounting pieces 41. If the secondary board 2 needs to be hung, a corresponding secondary groove can also be opened at the bottom end of the secondary board 2 and installed on the wall through the edge trimming mounting pieces 41.

[0036] In addition, since the wall is usually not completely flat, the connecting plate 411 can be connected to the wall through a leveling piece. Figure 1 , Figure 2 As shown, the leveling member includes a plurality of keels 42 and adjustment screws for connecting the keels 42 and the wall. The keels 42 are preferably keels with a relatively small thickness; the adjustment screws are consistent with ordinary screws, including a head and a screw portion for nailing into the wall, but in this application, the head of the adjustment screw is provided with an external thread. In cooperation with this, as Figure 5 As shown, the keel 42 is provided with at least two threaded adjustment holes that can be connected with the adjustment screws along its length direction, for example, threaded adjustment holes are provided at both ends of the keel 42; the threaded adjustment hole includes a through hole portion 421 for the screw portion to pass through, and an internal thread portion 422 that can be threadedly connected with the head. When in use, after the keel 42 and the adjustment screw are connected with the head through the internal thread portion 422, the screw portion of the adjustment screw protruding from the back of the keel 42 is nailed into the wall, and leveling can be achieved by adjusting the depth of the adjustment screws at both ends of the keel 42 being nailed into the wall. Then the connecting plate 411 can be connected to the keel 42 by ordinary screws. At this time, based on the structure of the semi-groove of the secondary plate 2, the back of the secondary plate 2 abuts against the keel 42 to provide support through the keel 42.

[0037] After completing the wall-mounted installation of the secondary board 2, install the main board 1. According to the different thicknesses of the TV, the distance from the main board 1 to the wall usually needs to be adjusted accordingly. Therefore, in this embodiment, as Figure 4 shown, the support assembly includes a first fixing member 51 connected to the wall and a first adjusting member 52 connected to the main board 1.

[0038] Among them, the first fixing member 51 includes a bottom plate connected to the wall, a first side plate non-parallelly connected to the bottom plate, and a second side plate non-parallelly connected to the bottom plate. At this time, a first insertion groove 511 can be formed between the bottom plate, the first side plate and the second side plate. The bottom plate, the first side plate and the second side plate are integrally formed. The bottom plate, the first side plate and the second side plate are preferably structures with hollow interiors and provided with support plates to reduce material costs while ensuring strength. The bottom plate can be connected to the wall in any way. In this application, the bottom plate includes an adhesive connection part and a nail connection part. The adhesive connection part and the above-mentioned first side plate and second side plate form the above-mentioned first insertion groove 511. A glue groove is provided on the side of the adhesive connection part close to the wall for filling with an adhesive to bond the bottom plate to the wall, and the nail connection part is connected to the wall by screws. To improve the strength of the screw connection, preferably, a reinforcing plate is provided inside the hollow nail connection part. As long as the reinforcing plate is not perpendicular to the wall, when the screw is fixed, the screw sequentially passes through the front plate of the nail connection part away from the wall, the reinforcing plate, and the back plate of the nail connection part close to the wall and then inserts into the wall.

[0039] Cooperating with the first insertion groove 511, the first adjusting member 52 includes a first insertion strip 521. As long as the first insertion strip 521 can be inserted into the first insertion groove 511 in a direction non-parallel to the wall, the distance from the wall panel to the wall can be adjusted. To increase the contact area between the first insertion strip 521 and the first insertion groove 511 and improve the connection strength between the two, preferably, the first insertion strip 521 is selected as a straight plate. Correspondingly, the first side plate and the second side plate of the first fixing member 51 are arranged in parallel. At the same time, considering the convenience of adjustment, in this application, the first insertion strip 521 is inserted into the first insertion groove 511 in a direction perpendicular to the wall. Therefore, both the first side plate and the second side plate of the first fixing member 51 are perpendicularly connected to the bottom plate.

[0040] Of course, simply connecting the first fixing member 51 and the first adjusting member 52 by plugging has the problem of low connection strength. Therefore, the support assembly further includes fixing screws. After adjusting the depth of insertion of the first adjusting member 52 into the first fixing member 51, the fixing screws can be passed through the first side plate, the first insertion strip 521, and the second side plate in sequence. At the same time, since several first fixing members 51 and first adjusting members 52 are needed during use and the insertion depth of the first adjusting member 52 needs to be adjusted separately, usually after adjusting the insertion depths of all the first adjusting members 52, the fixing screws are used for fixation to avoid repeatedly disassembling and assembling the fixing screws when it is necessary to readjust a certain first adjusting member 52. At this time, in order to prevent the first adjusting member 52 with the adjusted insertion depth from moving under external force, friction lines are provided on the inner wall of the first insertion groove 511 or / and the outer wall of the first insertion strip 521. The friction lines can be concave-convex lines, which can increase the friction force between the inner wall of the first insertion groove 511 and the first insertion strip 521.

[0041] The first adjusting member 52 can be connected to the main board 1 in any way. For example, the back surface of the main board 1 can be directly glued to the end surface of the first insertion strip 521 or connected by screws. These connection methods all have certain defects, such as being non-environmental and easily damaging the main board 1. Therefore, in this embodiment, the main board 1 is connected to the first adjusting member 52 by plugging. That is, the first adjusting member 52 further includes a main insertion plate 522 connected to the first insertion strip 521 and parallel to the wall. At this time, the first adjusting member 52 is in a T shape, and a main groove for the main insertion plate 522 to insert is provided at the end of the main board 1. During use, main grooves are provided at both ends of the upper sub-board 101 and the lower sub-board 102, and the main grooves at both ends of the sub-boards are respectively plugged with the main insertion plates 522 of the two first adjusting members 52. For the edge board 103, only a main groove needs to be opened at one end and plugged with the main insertion plate 522, and the other end can be fixed by any other method. For example, in this embodiment, as Figure 3 shown, a side plate is vertically connected to the free end on the left side of the edge board 103. During installation, it is moved from left to right so that the main groove at its right end is plugged with the main insertion plate 522. At this time, a stop block is added to the wall so that the side plate of the edge board 103 abuts against the left side surface of the stop block. This stop block can refer to the structure of the support assembly and also includes a fixing member and an insertion strip. The difference is that a stop baffle is connected to the insertion strip, and the side plate of the edge board 103 abuts against the side end surface of the stop baffle. At the same time, the stop baffle can also be used as the installation base of the lamp. In addition, the side sealing plate 3 can be used. One end of the side sealing plate 3 abuts against the edge board 103, and the other end abuts against the secondary board 2. The side sealing plate 3 not only provides a supporting effect for the edge board 103, but also plays a role in covering the support assembly between the sub-board and the wall. In this embodiment, the stop block and the side sealing plate 3 are used in combination, and the side sealing plate 3 abuts against the stop baffle.

[0042] In this application, in order to ensure the support strength, the first insertion strip 521 is designed to be thicker. If the main insertion plate 522 is directly connected to the first insertion strip 521, there will be a large gap between the two sub-plates and between the sub-plate and the edge plate. Therefore, in this embodiment, the first adjustment member 52 also includes a narrower slot plate, which is parallel to the first insertion strip 521, one end of which is connected to the first insertion strip 521, and the other end is vertically connected to the main insertion plate 522.

[0043] After installing the main board 1 in the above manner, there is still the problem that the middle part of the upper and lower boards and the edge board is not supported and is easy to collapse under stress. Therefore, in this embodiment, the support assembly also includes a flat piece, and the flat piece includes a plurality of substrates 531, and the substrate 531 is arranged between two adjacent first adjustment members 52, and the substrate 531 abuts against the main board 1 to provide support through the substrate 531. The substrate 531 can be connected to the first adjustment member 52 in any way, preferably a fixed connection. In this embodiment, in order to facilitate the connection of the substrate 531, the first adjustment member 52 also includes a support plate, and the support plate is arranged between the first insertion strip 521 and the card seam plate, and the support plate is arranged vertically with the first insertion strip 521. When installing the substrate 531, the end of the substrate 531 is superimposed on the support plate and fixed by a screw. The support plate is also preferably made of a thicker hollow plate to improve the fixing effect of the substrate 531.

[0044] Considering that the first insertion strip 521 and the support plate both need thicker plates, and the slot plate and the main insertion plate 522 both need thinner plates, it is preferred to produce the first insertion strip 521 and the support plate in one piece, and produce the slot plate and the main insertion plate 522 in one piece, and then connect the slot plate to the support plate. At this time, considering the connection problem between the two, the slot plate is also connected to a fixing plate parallel to the main insertion plate 522, so that the fixing plate, the slot plate and the main insertion plate 522 form an I-shaped member, and when in use, the fixing plate and the support plate can be connected by screws.

[0045] The above-mentioned support assembly connects the left and right ends of the split board. For the upper split board 101 located above the TV mounting hole 10, a receiving assembly is also required to support the upper split board 101 to prevent the upper split board 101 from falling off. Figure 6As shown, the receiving component includes a second fixing member 61 and a second adjusting member 62. The second fixing member 61 is connected to the wall, and the second fixing member 61 is provided with a second insertion slot 611. The second adjusting member 62 includes a second insertion strip 621 for inserting into the second insertion slot 611 in a direction non-parallel to the wall. In this embodiment, the structures of the second fixing member 61 and the second insertion strip 621 are the same as those of the support component, which will not be elaborated here. The difference is that the second adjusting member 62 further includes a receiving plate 622 connected to the second insertion strip 621, and the receiving plate 622 is parallel to the wall. During use, after adjusting the depth of the second insertion strip 621 inserted into the second insertion slot 611 and fixing it with screws, the lower end surface of the upper sub-board 101 abuts against the receiving plate 622, and preferably, the decorative surface of the upper sub-board 101 is flush with the surface of the receiving plate 622 away from the wall. Of course, an extension plate can also be added to the lower end of the upper sub-board 101. The extension plate is thinner than the upper sub-board 101. One surface of the extension plate is flush with the decorative surface of the upper sub-board 101, and the other surface abuts against the surface of the receiving plate 622 away from the wall to cover the receiving component. In addition, since the substrate 531 is fixedly connected to the support plate by screws, it does not need to be received, but in order to reduce the stress on the screws, preferably, the lower end surface of the substrate 531 is also abutted against the receiving plate 622.

[0046] At this time, the upper side plate of the above-mentioned sealing frame 7 abuts against the lower end surface of the receiving plate 622, and the remaining side plates of the sealing frame 7 abut against the edge receiving plate 103 and the lower sub-board 102. Considering that the edge receiving plate 103 and the lower sub-board 102 in this application are both installed by plugging, their own fixing effect is relatively poor, and thus the sealing frame 7 cannot be effectively fixed. Therefore, in this application, there are also three fixing components with the same structure as the above-mentioned receiving component. The three fixing components and one receiving component enclose a rectangular frame, and the sealing frame 7 is inserted into the rectangular frame. At the same time, the upper end surface of the lower sub-board 102 and the side end surface of the edge receiving plate 103 respectively abut against the receiving plates of the fixing components.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A concave-convex background wall, comprising a background wall panel and a connecting structure for installing the background wall panel to a wall body, characterized in that: The background wall panel includes a main board (1) and a secondary board (2) that are parallel to each other. The main board (1) is provided with a TV mounting hole (10); the connection structure includes a support assembly for connecting the main board (1) to the wall, and a wall-attaching assembly for connecting the secondary board (2) to the wall; the wall-attaching assembly includes a trimming mounting member (41), and the trimming mounting member (41) includes a connecting plate (411) connected to the wall and a secondary insertion plate (412) connected to the connecting plate (411). An end of the secondary board (2) is provided with a secondary groove into which the secondary insertion plate (412) can be inserted. The support assembly includes a first fixing member (51) connected to the wall and a first adjusting member (52) connected to the main board (1). The first fixing member (51) is provided with a first insertion slot (511), and the first adjusting member (52) includes a first insertion strip (521) for inserting into the first insertion slot (511) in a direction non-parallel to the wall. The first adjusting member (52) further includes a main insertion plate (522) connected to the first insertion strip (521) and parallel to the wall. An end of the main board (1) is provided with a main groove into which the main insertion plate (522) can be inserted. The main board (1) includes an upper sub-board (101), a lower sub-board (102), and two trimming boards (103). The TV mounting hole (10) is formed among the upper sub-board (101), the lower sub-board (102), and the two trimming boards (103); the connection structure further includes a receiving assembly for receiving the upper sub-board (101). The receiving assembly includes a second fixing member (61) and a second adjusting member (62). The second fixing member (61) is connected to the wall, and the second fixing member (61) is provided with a second insertion slot (611). The second adjusting member (62) includes a second insertion strip (621) for inserting into the second insertion slot (611) in a direction non-parallel to the wall and a receiving plate (622) connected to the second insertion strip (621). The receiving plate (622) is parallel to the wall, and a lower end surface of the upper sub-board (101) abuts against the receiving plate (622).

2. A concave-convex background wall according to claim 1, characterized in that: The connecting plate (411) is connected to the wall through a leveling member; the leveling member includes a plurality of keels (42) and adjusting screws for connecting the keels (42) and the wall; the adjusting screws include heads and screw rod portions for being driven into the wall. The heads are provided with external threads; the keels (42) are provided with at least two threaded adjustment holes along their lengths. The threaded adjustment holes include through-hole portions (421) through which the screw rod portions can pass and internal thread portions (422) that can be threadedly connected to the heads; the connecting plate (411) is disposed on the keels (42), and the secondary board (2) abuts against the keels (42).

3. A concave-convex background wall according to claim 1, characterized in that: Friction lines are provided on an inner wall of the first insertion slot (511) or / and an outer wall of the first insertion strip (521).

4. A concave-convex background wall according to claim 1, characterized in that: The support assembly further includes a flattening member, the flattening member includes a plurality of base plates (531), the base plates (531) are arranged between two adjacent first adjusting members (52), and the base plates (531) are in contact with the main board (1).

5. A concave-convex background wall according to claim 1, characterized in that: A sealing frame (7) is provided in the TV mounting hole (10), and the sealing frame (7) includes side plates that are in contact with the receiving plate (622).

6. A concave-convex background wall according to claim 1, characterized in that: The upper sub-board (101) and the lower sub-board (102) are respectively provided with the main grooves at both ends, and one end of the edge receiving board (103) is provided with the main groove and the other end is vertically provided with a side plate; the connecting structure further includes a stop block provided on the wall, and the side plate is in contact with the stop block.

7. A concave-convex background wall according to claim 6, characterized in that: The background wall panel further includes a side sealing plate (3) provided between the main board (1) and the secondary board (2), one end of the side sealing plate (3) is in contact with the edge receiving board (103) and the other end is in contact with the secondary board (2).

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