Wall panel base box and wall panel system
By designing the frame and base of the wall panel base box, and utilizing the elastic deformation of the swinging component and the locking groove structure, the problem of unevenness between the decorative surface of the wall panel base box and the outer surface of the wall panel was solved, achieving a stable connection and an aesthetically pleasing decorative effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 重庆集凯科技服务有限公司
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-21
AI Technical Summary
In existing prefabricated wall panel decoration, the decorative surface of the wall panel base box cannot be flush with the outer surface of the wall panel, resulting in difficult installation and an unsightly appearance.
Design a wall panel bottom box, including a frame part and a bottom box part. The decorative frame of the frame part is connected to the mounting frame, and the outer peripheral wall of the bottom box part is connected to a swinging component. The wall panel bottom box is flush installed by the elastic deformation of the swinging component. The cooperation between the locking groove and the swinging component ensures that the decorative frame is flush with the outer surface of the wall panel.
This design ensures that the decorative surface of the wall panel base box is flush with the outer surface of the wall panel, guaranteeing a stable connection, avoiding the risk of detachment, and improving installation efficiency and aesthetics.
Smart Images

Figure CN224532097U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of interior decoration technology, and more specifically to a wall panel back box and wall panel system. Background Technology
[0002] In the field of interior decoration, prefabricated construction is increasingly favored by consumers due to its convenience, speed, and environmental friendliness. Wall panels, as a key product in prefabricated construction, are also widely used. Currently, the installation requirements for wall boxes in prefabricated construction differ from those of traditional wall-mounted boxes, which are installed by cutting grooves in the wall. Traditionally, electrical conduits are pre-embedded by workers before the wall is sealed with cement, and a groove is chiseled at the designed location for the electrical switch box. The switch boxes are then installed gradually during subsequent decoration. However, in modern prefabricated construction, wall panels are factory-made assemblies. The space between the wall panel and the wall can be used to directly install electrical wiring conduits, changing the traditional process. The material properties of the wall panel prevent workers from drilling holes on-site. Therefore, the installation positions for the wall box are usually pre-cut in the factory. During installation, the existing wall panel and its corresponding box are directly installed to fill the holes before the wall panel is installed, achieving rapid installation of the wall panel and its corresponding box.
[0003] However, with the increasing demand for aesthetics in prefabricated decoration, and considering that traditional wall panel base boxes must protrude from the outer surface of the wall panel and extend along the outer surface of the wall panel in order to form a stable connection between the wall panel base box and the wall panel, there is a structural problem that makes it impossible to design a wall panel base box with the decorative surface of the wall panel flush with the outer surface of the wall panel.
[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content
[0005] In view of the above problems, this disclosure provides a wall panel back box and a wall panel system, which solves the problem that the decorative surface of the wall panel back box cannot be flush with the outer surface of the wall panel in the existing field of interior wall panel decoration.
[0006] A first aspect of this disclosure provides a wall panel bottom box for installation in an inner groove of a wall panel. The wall panel bottom box includes: a frame portion including a decorative frame and a mounting frame, wherein the inner sidewall of the decorative frame is connected to the outer sidewall of the mounting frame, and the decorative frame extends from the outer sidewall of the mounting frame in a direction away from the mounting frame; and a bottom box portion, wherein the opening end of the bottom box portion is connected to the inner sidewall of the mounting frame, and a swing member is connected to the outer peripheral wall of the bottom box portion, wherein the swing member extends from the outer peripheral wall of the bottom box portion in a direction close to the decorative frame.
[0007] In some exemplary embodiments, the mounting frame includes: a first frame segment, the extension direction of the first frame segment forming a first angle with the extension direction of the decorative frame, and one end of the first frame segment along its extension direction being connected to the inner sidewall of the decorative frame; and a second frame segment, the extension direction of the second frame segment forming a second angle with the extension direction of the first frame segment, and one end of the second frame segment along its extension direction being connected to the other end of the first frame segment along its extension direction, wherein the other end of the second frame segment along its extension direction is connected to the opening end of the bottom box portion.
[0008] In some exemplary embodiments, the extension direction of the outer peripheral wall of the base box is parallel to the extension direction of the first frame segment, and / or the extension direction of the second frame segment is parallel to the extension direction of the decorative frame.
[0009] In some exemplary embodiments, both the first included angle and the second included angle are right angles.
[0010] In some exemplary embodiments, the extending direction of the peripheral wall of the bottom box portion forms a third angle with the extending direction of the second frame segment, and the third angle is a right angle.
[0011] In some exemplary embodiments, the outer diameter of the swing member along its extension direction gradually increases from the outer peripheral wall of the base box towards the decorative frame.
[0012] In some exemplary embodiments, a fourth included angle is formed between the swing member and the outer peripheral wall of the base box portion, the fourth included angle being directed toward the frame portion.
[0013] In some exemplary embodiments, the connection between the outer peripheral wall of the base box and the side of the swing member away from the frame portion forms a smooth angle.
[0014] In some exemplary embodiments, the end of the swing member near the decorative frame has an abutting surface, the distance between the abutting surface and the outer peripheral wall of the base box portion forms a first gap, and the distance between the decorative frame and the extended surface of the outer peripheral wall of the base box portion forms a second gap, wherein the first gap is not less than the second gap.
[0015] A second aspect of this disclosure provides a wall panel system, including a wall panel and the aforementioned wall panel base box; wherein, the wall panel has a pre-fabricated hole for the base box, and a locking groove is formed on the side wall of the pre-fabricated hole near the outer side of the wall panel, the locking groove being recessed from the side wall of the pre-fabricated hole, the wall panel base box being inserted into the pre-fabricated hole, and when the wall panel base box moves from the outer side of the pre-fabricated hole toward the hole, the side wall of the pre-fabricated hole can push a swinging member to swing toward the outer peripheral wall of the base box, so that the wall panel base box is inserted into the pre-fabricated hole; when the wall panel base box is inserted into the pre-fabricated hole to abut, the decorative frame is embedded in the locking groove, and the surface of the decorative frame facing the outer side of the wall panel is flush with the outer surface of the wall panel. Attached Figure Description
[0016] The foregoing contents, as well as other objects, features, and advantages of this disclosure, will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:
[0017] Figure 1 This schematic diagram illustrates the structure of the wall panel back box and wall panel system after installation according to an embodiment of the present disclosure;
[0018] Figure 2 A schematic diagram of the structure of the bottom box according to an embodiment of the present disclosure is shown.
[0019] Figure 3 A schematic diagram of a wall panel system according to an embodiment of the present disclosure is shown.
[0020] Attached icon number
[0021] 100. Frame body; 110. Decorative frame; 120. Mounting frame; 121. First frame segment; 122. Second frame segment;
[0022] 200. Base box; 210. Swinging component; 211. Abutment surface;
[0023] 300, wall panel; 310, prefabricated hole for bottom box; 320, slot. Detailed Implementation
[0024] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.
[0025] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.
[0026] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.
[0027] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.
[0028] As one aspect of the embodiments of this disclosure, such as Figures 1 to 3 As shown, a wall panel 300 base box is provided for installation in the inner groove of the wall panel 300. The wall panel 300 base box includes: a frame part 100, including a decorative frame 110 and a mounting frame 120, the inner sidewall of the decorative frame 110 being connected to the outer sidewall of the mounting frame 120, and the decorative frame 110 extending from the outer sidewall of the mounting frame 120 in a direction away from the mounting frame 120; and a base box part 200, the opening end of the base box part 200 being connected to the inner sidewall of the mounting frame 120, and a swing member 210 connected to the outer peripheral wall of the base box part 200, the swing member 210 extending from the outer peripheral wall of the base box part 200 in a direction close to the decorative frame 110.
[0029] Specifically, in the wall panel 300 bottom box of this embodiment, the decorative frame 110 is embedded in the inner groove of the wall panel 300 to achieve a flush surface. At the same time, the swing member 210 elastically deforms during the insertion process and then resets and latches onto the inner wall of the wall panel 300, avoiding the risk of the wall panel 300 bottom box coming out of the inner groove of the wall panel 300. Therefore, the wall panel 300 bottom box of this embodiment can be directly snapped into and fixed in the inner groove of the wall panel 300 as needed, and the decorative surface of the wall panel 300 bottom box is flush with the outer surface of the wall panel 300.
[0030] In some embodiments, the decorative frame 110 forms a decorative interface flush with the outer surface of the wall panel 300, the mounting frame 120 forms a support structure extending into the wall panel 300, and the bottom box 200 is a component for accommodating electrical switches and other objects. The bottom box 200 undergoes a swing deformation towards the outer peripheral wall of the bottom box 200 when the swing member 210 is pressed against the pre-drilled hole in the wall panel 300, until the decorative frame 110 is embedded in the locking groove 320 of the wall panel 300. The swing member 210 then springs back and unfolds, and the unfolded end of the swing member 210 forms a locking connection with the inner wall of the wall panel 300 near the wall, thereby achieving locking in an installation state where the bottom box of the wall panel 300 has zero protrusion relative to the outer surface of the wall panel 300. In some embodiments... In this example, the swing member 210 extends from the outer peripheral wall of the bottom box 200 toward the decorative frame 110, that is, the unfolded end of the swing member 210 is set toward the decorative frame 110, that is, a relative groove is formed between the unfolded end and the decorative frame 110. The unfolded end and the decorative frame 110 are connected in sequence through the outer peripheral wall of the bottom box 200, the bottom box 200, the box opening end of the bottom box 200, the inner side wall of the mounting frame 120, the mounting frame 120, the outer side wall of the mounting frame 120 and the inner side wall of the decorative frame 110. The groove formed by the unfolded end and the decorative frame 110 clamps the inner surface of the wall panel 300 near the wall and the locking groove 320 of the wall panel 300 to form a stable clamping relationship.
[0031] like Figure 1 and Figure 2As shown, in some exemplary embodiments, the mounting frame 120 includes: a first frame segment 121, the extension direction of the first frame segment 121 forming a first angle with the extension direction of the decorative frame 110, and one end of the first frame segment 121 along its extension direction being connected to the inner sidewall of the decorative frame 110; and a second frame segment 122, the extension direction of the second frame segment 122 forming a second angle with the extension direction of the first frame segment 121, and one end of the second frame segment 122 along its extension direction being connected to the other end of the first frame segment 121 along its extension direction, wherein the other end of the second frame segment 122 along its extension direction is connected to the opening end of the bottom box portion 200. Specifically, in this embodiment, the first frame segment 121 forms a transition structure between the decorative frame 110 and the bottom box portion 200, and the second frame segment 122 constructs an installation positioning platform for the bottom box portion 200, so that the bottom box portion 200 obtains stable support in the thickness direction of the wall panel 300. When the base box of the wall panel 300 is inserted into the pre-drilled hole on the wall panel 300, the coordinated turning of the first and second included angles allows the inner wall of the opening of the wall panel 300 to smoothly press against the swing member 210, while ensuring that the decorative frame 110 is accurately embedded in the locking groove 320. For example, the first frame segment 121 and the first included angle of the decorative frame 110 form a first load-bearing angle. This design allows the mounting frame 120 to resist the lateral pressing force of the wall panel 300 on the base box portion 200.
[0032] like Figure 1 and Figure 2 As shown, in some exemplary embodiments, the extending direction of the outer peripheral wall of the base box 200 is parallel to the extending direction of the first frame segment 121, and / or the extending direction of the second frame segment 122 is parallel to the extending direction of the decorative frame 110. Specifically, in this embodiment, the parallel arrangement of the outer peripheral wall of the base box 200 and the first frame segment 121 forms a double-layer load-bearing surface, jointly resisting the compressive force of the wall panel 300 on the swing member 210. The parallel extension of the second frame segment 122 and the decorative frame 110 establishes an equidistant positioning reference, ensuring that the swing member 210 synchronously completes the rebound locking when the decorative frame 110 is embedded in the locking groove 320. In some embodiments, this parallel relationship allows the swing member 210 to produce predictable deformation in a single direction when the base box 200 penetrates the wall panel 300, avoiding angular displacement during installation.
[0033] like Figure 1 and Figure 2As shown, in some exemplary embodiments, both the first included angle and the second included angle are right angles. Specifically, in this embodiment, the vertical turning structure makes the mounting frame 120 form a spatial right-angle support. The first frame segment 121 vertically transmits the installation pressure borne by the decorative frame 110 to the second frame segment 122, and the second frame segment 122 then converts the pressure into an axial fixing force for the bottom box portion 200. In some embodiments, this right-angle layout constitutes a mechanical triangular stability zone. When the swing member 210 is squeezed by the wall of the wall panel 300 hole, the right-angle turning point forms an anti-deformation fulcrum, effectively preventing the mounting frame 120 from undergoing plastic bending under pressure.
[0034] like Figure 1 and Figure 2 As shown, in some exemplary embodiments, the extending direction of the peripheral wall of the base box 200 forms a third angle with the extending direction of the second frame segment 122, and the third angle is a right angle. Specifically, in this embodiment, the vertical connection between the base box 200 and the second frame segment 122 forms an installation platform, making the extending direction of the base box 200 parallel to the thickness direction of the wall panel 300. This right-angled layout also ensures that the base box 200 penetrates the wall panel 300, and when the decorative frame 110 is embedded in the slot 320, the swing member 210 bounces up in a direction perpendicular to the peripheral wall of the base box 200, forming a snap-fit surface intersecting with the inner wall of the wall panel 300.
[0035] like Figure 1 and Figure 2 As shown, in some exemplary embodiments, the outer diameter of the swing member 210 along its extension direction gradually increases from the outer peripheral wall of the base box portion 200 towards the decorative frame 110. Specifically, in this embodiment, the gradually increasing structure forms a wedge-shaped swing member 210, so that the inner wall of the pre-drilled hole in the wall panel 300 receives progressive guiding pressure when it contacts the swing member 210, reducing insertion resistance. In some embodiments, the wide abutment area formed by the swing member 210 near the wall panel 300 forms a surface contact with the inner surface of the wall panel 300. When the swing member 210 rebounds and locks, the contact area between the outer end face of the swing member 210 near the wall panel 300 and the inner wall of the wall panel 300 is significantly larger than the connection area between the swing member 210 and the outer peripheral wall of the base box portion 200, making it easier for the swing member 210 to swing and insert, but not easy to dislodge, achieving a more stable connection.
[0036] like Figure 1 and Figure 2As shown, in some exemplary embodiments, a fourth included angle is formed between the swing member 210 and the outer peripheral wall of the base box portion 200, the fourth included angle facing the frame portion 100. Specifically, in this embodiment, the fourth included angle structure causes the swing member 210 to tilt outwards from the wall in its natural state, forming a pre-tightened elastic arm. In some embodiments, when the wall panel 300 base box is inserted into the pre-drilled hole, the swing member 210 forms a guide ramp, guiding the pressure of the hole wall to be converted into a folding torque in a direction perpendicular to the outer peripheral wall of the base box portion 200, causing the swing member 210 to generate controllable elastic deformation in a direction closer to the outer peripheral wall of the base box portion 200, until the decorative frame 110 reaches the installation position and returns to its initial tilted state.
[0037] like Figure 1 and Figure 2 As shown, in some exemplary embodiments, a smooth angle is formed at the connection between the outer peripheral wall of the base box portion 200 and the side of the swing member 210 away from the frame portion 100. Specifically, in this embodiment, the smooth angle transition structure eliminates stress concentration points, so that the stress is evenly distributed along the curvature when the swing member 210 is pressed and swings. In some embodiments, the smooth angle forms an elastic hinge area, which produces uniform bending deformation when the swing member 210 is squeezed by the hole wall; when the pressure is released, the elastic memory effect ensures that the swing member 210 accurately rebounds to the locked position along the original rotation path, avoiding permanent deformation.
[0038] like Figure 1 and Figure 2 As shown, in some exemplary embodiments, the swing member 210 has an abutment surface 211 at one end near the decorative frame 110. The distance between the abutment surface 211 and the outer peripheral wall of the base box 200 forms a first gap, and the distance between the decorative frame 110 and the extended surface of the outer peripheral wall of the base box 200 forms a second gap. The first gap is not less than the second gap. Specifically, in this embodiment, this dimensional relationship ensures that the abutment surface 211 is further away from the outer peripheral wall of the base box 200 than the bottom of the slot 320 in the thickness direction of the wall panel 300. When the decorative frame 110 is inserted into the slot 320, the abutment surface 211 of the swing member 210 will inevitably press against the inner wall of the wall panel 300 near the wall. In some embodiments, the difference between the first gap and the second gap forms an anti-overturning lever arm, causing the reaction force of the inner wall of the wall panel 300 on the abutment surface 211 to generate a torque in the direction of the decorative frame 110, forcing the decorative frame 110 to fit tightly against the bottom of the slot 320, eliminating the risk of the decorative frame 110 coming out.
[0039] As a second aspect of the embodiments of this disclosure, such as Figures 1 to 3As shown, a wall panel 300 system is provided, including a wall panel 300 and the aforementioned wall panel 300 base box; wherein, the wall panel 300 has a pre-fabricated hole 310 for the base box, and a locking groove 320 is formed at one end of the side wall of the pre-fabricated hole 310 near the outer side of the wall panel 300, the locking groove 320 being recessed from the side wall of the pre-fabricated hole 310, and the wall panel 300 base box passing through the pre-fabricated hole 310, wherein the wall panel 300 base box is inserted into the pre-fabricated hole 310. When the outer end of the pre-drilled hole 310 moves into the hole, the side wall of the pre-drilled hole 310 can push the swinging member 210 to swing towards the outer peripheral wall of the bottom box 200, so that the bottom box of the wall panel 300 is inserted into the pre-drilled hole 310; when the bottom box of the wall panel 300 is inserted into the pre-drilled hole 310 and abuts, the decorative frame 110 is embedded in the locking groove 320, and the surface of the decorative frame 110 facing the outer side of the wall panel 300 is flush with the outer surface of the wall panel 300. In this embodiment, when the operator applies an insertion force to align the wall panel 300 base box with the pre-drilled hole in the wall panel 300, the inner wall of the pre-drilled hole contacts the inclined surface of the gradually increasing outer diameter of the swing member 210, forcing the swing member 210 to pivot and retract towards the outer peripheral wall of the base box 200 until the swing member 210 is in contact with the outer peripheral wall of the base box 200. At this time, the entire wall panel 300 base box smoothly slides into the pre-drilled hole. As the insertion force continues to act, the decorative frame 110 is embedded in the bottom of the locking groove 320 at the end of the pre-drilled hole. Simultaneously, the swing member 210 rebounds and unfolds beyond the inner wall of the wall panel 300, causing the abutment surface 211 at the end of the swing member 210 to press tightly against the inner wall of the wall panel 300. At this time, the outer surface of the decorative frame 110 and the surface of the wall panel 300 are completely coplanar, forming a flush interface. The dimensional relationship that the first spacing is greater than the second spacing causes the abutment surface 211 of the swing member 210 to generate a lever torque in the direction of the decorative frame 110. This torque forces the bottom of the decorative frame 110 to press against the bottom surface of the locking groove 320 to achieve bidirectional locking. In some embodiments, the first frame segment 121 of the mounting frame 120 converts the axial pressure borne by the decorative frame 110 into a vertical support force and transmits it to the bottom box 200. At the same time, the wide contact surface at the end of the swing member 210 forms a surface-type load-bearing structure with the inner wall of the wall. When an external force attempts to pull out the bottom box of the wall panel 300, the lever torque effect converts the pulling force into an enhanced clamping force, ensuring that the decorative frame 110 does not displace or loosen within the locking groove 320.
[0040] Those skilled in the art will understand that the features described in the various embodiments of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.
[0041] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.
Claims
1. A wall panel bottom box for installation in an inner groove of a wall panel, characterized in that, The wall panel bottom box includes: The frame includes a decorative frame and a mounting frame. The inner sidewall of the decorative frame is connected to the outer sidewall of the mounting frame, and the decorative frame extends from the outer sidewall of the mounting frame in a direction away from the mounting frame. The bottom box portion has its opening end connected to the inner side wall of the mounting frame, and its outer peripheral wall is connected to a swinging member that extends from the outer peripheral wall of the bottom box portion toward the decorative frame.
2. The wall panel bottom box according to claim 1, characterized in that, The mounting frame includes: The first frame segment extends at a first angle to the extension direction of the decorative frame, and one end of the first frame segment along its extension direction is connected to the inner wall of the decorative frame. The second frame segment extends at a second angle to the extension direction of the first frame segment. One end of the second frame segment along its extension direction is connected to the other end of the first frame segment along its extension direction. The other end of the second frame segment along its extension direction is connected to the opening end of the bottom box portion.
3. The wall panel bottom box according to claim 2, characterized in that, The extension direction of the outer peripheral wall of the bottom box is parallel to the extension direction of the first frame segment. And / or the extension direction of the second frame segment is parallel to the extension direction of the decorative frame.
4. The wall panel bottom box according to claim 3, characterized in that, Both the first included angle and the second included angle are right angles.
5. The wall panel bottom box according to claim 4, characterized in that, The extension direction of the peripheral wall of the bottom box portion forms a third angle with the extension direction of the second frame segment, and the third angle is a right angle.
6. The wall panel bottom box according to claim 1, characterized in that, The outer diameter of the swing member along its extension direction gradually increases from the outer peripheral wall of the base box towards the decorative frame.
7. The wall panel bottom box according to claim 1, characterized in that, The swing member forms a fourth included angle with the outer peripheral wall of the bottom box, and the fourth included angle faces the frame.
8. The wall panel bottom box according to claim 7, characterized in that, The outer peripheral wall of the base box and the connection point of the swing member on the side away from the frame form a smooth angle.
9. The wall panel bottom box according to claim 7, characterized in that, The swing member has an abutting surface at one end near the decorative frame. The distance between the abutting surface and the outer peripheral wall of the base box forms a first gap, and the distance between the decorative frame and the extended surface of the outer peripheral wall of the base box forms a second gap. The first gap is not less than the second gap.
10. A wall panel system, characterized in that, Includes a wall panel, and a wall panel base box as described in any one of claims 1 to 9; The wall panel has a pre-fabricated bottom box hole. A locking groove is formed on the side wall of the bottom box hole near the outer side of the wall panel. The locking groove is recessed into the side wall of the bottom box hole, and the wall panel bottom box passes through the bottom box hole. When the wall panel bottom box moves from the outer end of the pre-made hole in the bottom box towards the inside of the hole, the side wall of the pre-made hole in the bottom box can push the swinging member to swing towards the outer peripheral wall of the bottom box, so that the wall panel bottom box can be inserted into the pre-made hole in the bottom box; when the wall panel bottom box is inserted into the pre-made hole in the bottom box until it abuts, the decorative frame is embedded in the slot, and the surface of the decorative frame facing the outer side of the wall panel is flush with the outer surface of the wall panel.