Hollow plate

Abstract

The utility model discloses a hollow plate, which relates to the technical field of plates and comprises a base plate, a plurality of edge folding components, a connecting component and a cover plate. The multiple edge folding components are arranged on the four edges of the base plate respectively, the multiple edge folding components are sequentially enclosed, a hollow cavity is formed by the multiple edge folding components and the base plate, each edge folding component comprises a side edge part and an edge closing part, the edge closing parts are folded towards the hollow cavity from the side edge parts, the connecting components are arranged at the connecting positions of every two adjacent edge folding components, and the connecting components abut against the two adjacent edge folding components. The cover plate is arranged in the hollow cavity, is connected with two adjacent edge folding parts and covers the hollow cavity; according to the utility model, the connecting parts are arranged at the joints of the adjacent edge folding parts to connect the two adjacent edge folding parts and abut against the two adjacent edge folding parts, so that the structural strength of the corner positions of the hollow plate is improved on the basis of realizing low manufacturing cost of the hollow plate, and the overall structural strength of the hollow plate is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of plates, in particular to a hollow plate. Background Art

[0002] When forming a hollow plate, a whole piece of thin metal plate is generally used as the base of the hollow plate, and then the four sides of the thin metal plate are cut and bent to form the four sides of the hollow plate. Since the four sides of the hollow plate are separated by cutting, there is no connection between the adjacent two sides. If the adjacent parts of the four sides of the hollow plate are directly abutted and joined, the structural strength of the corners of the hollow plate will be poor, resulting in the overall structural strength of the hollow plate being low. Utility Model Content

[0003] The main purpose of the utility model is to provide a hollow plate, aiming to ensure the overall structural strength of the hollow plate.

[0004] In order to achieve the above-mentioned purpose, the hollow plate proposed by the utility model comprises:

[0005] substrate;

[0006] A plurality of folding parts, wherein the folding parts are respectively arranged on four sides of the substrate, and the folding parts are sequentially enclosed to form a hollow cavity with the substrate, and the folding parts include side portions and a folding portion folded from the side portions to the hollow cavity;

[0007] A connecting component, wherein the connecting component is disposed at a connection position of two adjacent folding components, the connecting component abuts against the two adjacent folding components, and connects the two adjacent folding components; and

[0008] A cover plate is arranged to cover the hollow cavity.

[0009] In one embodiment, the connecting component includes an upper mating component, a lower mating component and a plug-in component. The upper mating component is snap-fitted with the two adjacent trimming parts to connect the two adjacent folding parts. The lower mating component abuts between the substrate and the upper mating component, and at the same time abuts against the two adjacent side parts. A connecting gap is provided between the two adjacent folding parts. The plug-in component passes through the connecting gap to the hollow cavity to connect the lower mating component and the folding part.

[0010] In one embodiment, an L-shaped through groove is provided on the top of the upper mating piece, and two plug-in protrusions are provided in the L-shaped through groove. A card slot is provided at the lower end of each of the two adjacent edge trimming parts, and the two card slots are respectively engaged with the two plug-in protrusions, so that the upper mating piece connects the two adjacent folding parts from bottom to top.

[0011] In one embodiment, a first elastic latch is provided at the bottom of the upper mating piece, and a socket is provided at the top of the lower mating piece. When the lower mating piece abuts between the substrate and the upper mating piece, the first elastic latch is inserted into the socket to limit the movement of the lower mating piece relative to the upper mating piece.

[0012] In one embodiment, the lower mating piece is provided with an elastic bayonet and a first inner cavity connected to the elastic bayonet. After the lower mating piece and the upper mating piece are assembled in place, the elastic bayonet faces the connecting gap, and the plug-in piece includes an edge sealing portion and a latching protrusion arranged in opposite directions. When the latching protrusion is inserted from the elastic bayonet and latched in the first inner cavity, the edge sealing portion abuts against the edge of the folding component.

[0013] In one embodiment, the hollow plate further includes an edge portion, which is disposed at a connection between the substrate and one of the side edge portions and extends from the side edge portion toward a direction away from the substrate, the edge portion having a second inner cavity connected to the hollow cavity, the lower mating piece being provided with an inserting portion which can be inserted into the second inner cavity, and an abutting portion connected to the inserting portion, the abutting portion being used to abut the side edge portion provided with the edge portion.

[0014] In one embodiment, a second elastic latch is provided on one side of the lower fitting member close to the side portion, and the connector includes an edge sealing portion and a limiting portion arranged opposite to each other, and the limiting portion is provided with a latch interface. When the connector passes from the connecting gap to the hollow cavity, the limiting portion is abutted between the side portion and the lower fitting member, and the second elastic latch is snapped into the latch interface, and the edge sealing portion abuts against the edge of the folding component.

[0015] In one embodiment, a sliding groove is provided at the bottom of the upper mating piece, and a sliding bar that slidably cooperates with the sliding groove is provided at the top of the lower mating piece. When the upper mating piece connects two adjacent folding parts, the sliding groove cooperates with the sliding bar to slide the lower mating piece to limit the position, so that a accommodating space for inserting the connector is formed between the side of the lower mating piece where the second elastic latch is provided and the adjacent side portion.

[0016] In one embodiment, a seam opening is provided at one end of the connecting gap facing the outer side of the hollow plate, and the edge sealing portion is used to fill the seam opening.

[0017] In one embodiment, the upper end of the edge sealing portion is flush with the upper end of the folding component, and the lower end of the edge sealing portion is flush with the lower end surface of the base plate.

[0018] The technical solution of the utility model is to arrange folding parts around the base plate, form side parts and folding parts for folding by bending the folding parts, form a hollow cavity by enclosing multiple side parts and the base plate, and cover the hollow cavity with a cover plate to form a hollow plate material, and arrange a connecting part at the connection of adjacent folding parts to connect two adjacent folding parts and abut with the two adjacent folding parts. On the basis of achieving low production cost of the hollow plate material, the structural strength of the corners of the hollow plate material is improved, thereby ensuring the overall structural strength of the hollow plate material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A structural schematic diagram of an embodiment of a hollow plate provided by the utility model;

[0021] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 A schematic diagram of the structure of the hollow plate folding component provided by the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the connecting component in Example 1 of the utility model;

[0024] Figure 5 This is a schematic diagram of the installation of the connector in Embodiment 2 of the present utility model;

[0025] Figure 6 It is a schematic structural diagram of the connecting component in Example 2 of the present utility model.

[0026] Description of Figure Numbers:

[0027] 100, hollow plate; 10, base plate; 20, folding part; 21, side part; 22, edge part; 23, connecting gap; 30, connecting part; 31, upper fitting part; 311, L-shaped through groove; 312, plug-in protrusion; 313, first elastic clamping protrusion; 314, slide groove; 32, lower fitting part; 321, socket; 322, elastic clamping protrusion; 323, first inner cavity; 324, plug-in part; 325, abutting part; 326, second elastic clamping protrusion; 327, slide bar; 33, plug-in part; 331, clamping protrusion; 332, limiting part; 333, clamping interface; 334, edge sealing part; 40, edge part; 41, second inner cavity.

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] The utility model provides a hollow plate 100 .

[0033] Embodiment 1:

[0034] See also Figures 1 to 4 In one embodiment of the utility model, the hollow plate 100 includes a base plate 10, a plurality of folding parts 20, a connecting part 30 and a cover plate; the plurality of folding parts 20 are respectively arranged on the four sides of the base plate 10, and the plurality of folding parts 20 are sequentially enclosed to form a hollow cavity with the base plate 10, the folding parts 20 include side parts 21 and a folding part 22 folded from the side parts 21 to the hollow cavity, the connecting part 30 is arranged at the connection of two adjacent folding parts 20, the connecting part 30 abuts against the two adjacent folding parts 20, and connects the two adjacent folding parts 20, and the cover plate covers the hollow cavity.

[0035] In the utility model, the folding parts 20 and the base plate 10 are cut on the same thin metal plate and then bent. Since the adjacent folding parts 20 are formed by bending after cutting of straight plates, there are certain connecting gaps 23 between the adjacent folding parts 20, which makes the connection between the adjacent folding parts 20 not strong enough. For this reason, the present application connects the two adjacent folding parts 20 by setting a connecting part 30 between the adjacent folding parts 20 to make them firmly connected.

[0036] The technical solution of the utility model is to arrange folding parts 20 around the base plate 10, and to form side parts 21 and a trimming part 22 for trimming the edges by bending the folding parts 20. A hollow cavity is formed by enclosing a plurality of side parts 21 and the base plate 10, and a cover plate is used to cover the hollow cavity to form a hollow plate 100. A connecting part 30 is arranged at the connection between adjacent folding parts 20 to connect two adjacent folding parts 20 and abut against the two adjacent folding parts 20. On the basis of achieving a low production cost of the hollow plate 100, the structural strength of the corners of the hollow plate 100 is guaranteed, thereby ensuring the overall structural strength of the hollow plate 100.

[0037] See also Figure 2 , Figure 3 As shown, in the embodiment of the utility model, the connecting component 30 includes an upper fitting component 31, a lower fitting component 32 and a plug-in component 33. The upper fitting component 31 is snap-fitted with the two adjacent edge parts 22 to connect the two adjacent folding components 20. The lower fitting component 32 abuts between the substrate 10 and the upper fitting component 31, and at the same time abuts against the adjacent two side edges 21. A connecting gap 23 is provided between the two adjacent folding components 20, and the plug-in component 33 passes through the connecting gap 23 to the hollow cavity to connect the lower fitting component 32 and the folding component 20.

[0038] In the above embodiment, the upper mating piece 31 is respectively engaged with the two adjacent edge trimming portions 22 to fix the two adjacent edge trimming portions 22 relative to the upper mating piece 31, and then the lower mating piece 32 is inserted into the gap between the upper mating piece 31 and the substrate 10, and the upper and lower ends of the lower mating piece 32 respectively abut the upper mating piece 31 and the substrate 10, and the adjacent two side surfaces of the lower mating piece 32 respectively abut the adjacent two side edge portions 21, when the plug-in piece 33 is inserted into the lower mating piece 32 through the self-connecting gap 23 and engaged with the lower mating piece 32, the side edge portions 21 of the two adjacent folding parts 20 abut between the adjacent two sides of the connecting part 30, and the edge trimming portion 22 of the folding part 20 abuts against the substrate 10 between the upper and lower ends of the connecting part 30, thereby realizing the locking limit of the connecting part of the two adjacent folding parts 20, and ensuring the structural strength of the connection.

[0039] See also Figure 3 , Figure 4 As shown, in the embodiment of the utility model, an L-shaped through groove 311 is provided on the top of the upper mating piece 31, and two plug-in protrusions 312 are provided in the L-shaped through groove 311. A card groove is provided at the lower end of each of the two adjacent edge trimming parts 22, and the two card grooves are respectively engaged with the two plug-in protrusions 312. The above mating piece 31 connects the two adjacent folding parts 20 from bottom to top.

[0040] In the above embodiment, specifically, when the upper mating piece 31 connects two adjacent folding parts 20 from bottom to top, the two plug-in protrusions 312 are respectively inserted into the corresponding slots. Since the relative positions of the two plug-in protrusions 312 are fixed, when the plug-in protrusions 312 are inserted into the slots, the two adjacent slots are relatively fixed. Therefore, the two adjacent edge trimming portions 22 respectively provided with the two slots are relatively fixed, thereby realizing the connection and fixation of the two adjacent folding parts 20 at the edge trimming portions 22.

[0041] See also Figure 4 As shown, in the embodiment of the utility model, a first elastic latching protrusion 313 is provided at the bottom of the upper mating piece 31, and a socket 321 is provided at the top of the lower mating piece 32. When the lower mating piece 32 abuts between the substrate 10 and the upper mating piece 31, the first elastic latching protrusion 313 is inserted into the socket 321 to limit the movement of the lower mating piece 32 relative to the upper mating piece 31.

[0042] In the above embodiment, since the lower fitting part 32 is connected and fixed to the folding part 20 through the plug-in part 33, and the lower fitting part 32 is arranged between the upper fitting part 31 and the substrate 10, by arranging the first elastic clamping protrusion 313 at the bottom of the upper fitting part 31 and the socket 321 at the top of the lower fitting part 32, when the upper fitting part 31 is connected and fixed to two adjacent folding parts 20, the upper fitting part 31 itself can be locked and fixed by the lower fitting part 32, so that the upper fitting part 31 and the lower fitting part 32 are both limited and fixed, thereby ensuring the connection stability of the connecting part 30.

[0043] Continue reading Figure 4 In the embodiment of the utility model, the lower fitting 32 is provided with an elastic bayonet 322 and a first inner cavity 323 connected to the elastic bayonet 322. After the lower fitting 32 and the upper fitting 31 are assembled in place, the elastic bayonet 322 faces the connecting gap 23, and the plug-in component 33 includes an edge sealing portion 334 and a locking protrusion 331 arranged in opposite directions. When the locking protrusion 331 is inserted from the elastic bayonet 322 and locked in the first inner cavity 323, the edge sealing portion 334 abuts against the edge of the folding component 20.

[0044] In the above embodiment, when the connector 33 is inserted into the connecting gap 23 and the latching protrusion 331 is latched into the first inner cavity 323, the edge sealing portion 334 abuts against the edge of the folding part 20, so that the lower fitting part 32 is connected and fixed to the folding part 20, thereby ensuring that the lower fitting part 32 limits the folding part 20 and the upper fitting part 31.

[0045] Embodiment 2:

[0046] Different from the above-mentioned embodiment, when one side of the hollow plate 100 has an edge portion 40, when the folding component 20 provided with the edge portion 40 is connected to another folding component 20 not provided with the edge portion 40 through a connecting component 30, the connecting component 30 is different from the structure adopted in the first embodiment.

[0047] Among them, the connecting component 30 still includes an upper fitting 31, a lower fitting 32 and a plug-in connector 33. The upper fitting 31 is snap-fitted with the two adjacent edge parts 22 to connect the two adjacent folding parts 20. The lower fitting 32 abuts between the substrate 10 and the upper fitting 31, and abuts with the adjacent two side edges 21 at the same time. A connecting gap 23 is provided between the two adjacent folding parts 20. The plug-in connector 33 passes from the connecting gap 23 to the hollow cavity to connect the lower fitting 32 and the folding part 20. And the upper fitting 31 still has a plug-in protrusion 312. However, the upper fitting 31 is no longer provided with the first elastic snap-in protrusion 313, the lower fitting 32 is no longer provided with the socket 321, the elastic snap-in 322 and the first inner cavity 323, and the plug-in connector 33 is no longer provided with the snap-in protrusion 331. The details are as follows:

[0048] See also Figure 1 , Figure 5 , Figure 6As shown, in another embodiment of the utility model, different from the above embodiment, the hollow plate 100 also includes an edge portion 40, which is arranged at the connection between the substrate 10 and the side edge portion 21, and extends from the side edge portion 21 in a direction away from the substrate 10, and the edge portion 40 has a second inner cavity 41 connected to the hollow cavity, and the lower matching piece 32 is provided with a plug-in portion 324 that can be inserted into the second inner cavity 41, and abutting portion 325 connected to the plug-in portion 324, and the abutting portion 325 is used to abut the side edge portion 21 provided with the edge portion 40.

[0049] Specifically, when the hollow plate 100 is used as a door panel, an edge portion 40 can be set on one side of the hollow plate 100. The thickness of the edge portion 40 is less than that of the hollow plate 100, which is approximately half of the overall thickness of the hollow plate 100. When the cabinet body equipped with the door panel adopts a double-door opening timing, the edge portions 40 of the two door panels can be staggered and interlocked with each other, so that the gap is smaller after the door is closed and the sealing performance is better.

[0050] In the above embodiment, when the edge portion 40 is provided, the side portion 21 connected to the edge portion 40 has a structural change. For this reason, the lower fitting member 32 is provided with a plug-in portion 324 that can be inserted into the second inner cavity 41 of the edge portion 40, and an abutment portion 325 abutting against the above-mentioned side portion 21 is also provided. By utilizing the structural shape of the edge portion 40, the lower fitting member 32 is matched therewith, thereby increasing the structural strength at both ends of the edge portion 40.

[0051] See also Figure 5 , Figure 6 As shown, in another embodiment of the utility model, a second elastic latching protrusion 326 is provided on a side of the lower fitting 32 close to the side portion 21, and the plug-in component 33 includes an edge sealing portion 334 and a limiting portion 332 arranged opposite to each other, and the limiting portion 332 is provided with a latching interface 333. When the plug-in component 33 passes through the connecting gap 23 to the hollow cavity, the limiting portion 332 is abutted between the side portion 21 and the lower fitting 32, and the second elastic latching protrusion 326 is snapped into the latching interface 333, and the edge sealing portion 334 abuts against the edge of the folding component 20.

[0052] In the above embodiment, when the connector 33 is inserted from the connecting gap 23, the limiting portion 332 will abut between the side portion 21 and the lower fitting part 32, wherein the above-mentioned side portion 21 is a side portion 21 without an edge portion 40, and the edge sealing portion 334 abuts against the edges of the two adjacent folding parts 20 respectively. Since the second elastic latch 326 is elastic, when the connector 33 is inserted, the second elastic latch 326 is elastically compressed and then snapped into the snap interface 333, thereby locking with the lower fitting part 32, thereby fixing the lower fitting part 32 and the folding part 20.

[0053] See also Figure 6As shown, in another embodiment of the utility model, a slide groove 314 is provided at the bottom of the upper mating piece 31, and a slide bar 327 that slidably cooperates with the slide groove 314 is provided at the top of the lower mating piece 32. When the upper mating piece 31 connects two adjacent folding parts 20, the slide groove 314 cooperates with the slide bar 327 to slide and limit the lower mating piece 32, so that an accommodation space for inserting the plug-in component 33 is formed between one side of the lower mating piece 32 where the second elastic locking protrusion 326 is provided and the adjacent side edge portion 21.

[0054] In the above embodiment, since the upper mating piece 31 and the folding part 20 are plugged in from bottom to top through the card groove and the plug-in protrusion 312, the upper mating piece 31 is limited and fixed in the horizontal direction. When the upper mating piece 31 and the lower mating piece 32 are slidingly engaged with each other through the slide groove 314 and the slide bar 327, the lower mating piece 32 is slidingly limited relative to the upper mating piece 31, so that there is a accommodating space with a limited width between the lower mating piece 32 and the side portion 21. When the connector 33 is inserted into the accommodating space, the connector 33 can be limited when the second elastic card protrusion 326 is inserted into the card interface 333 to prevent the connector 33 from loosening.

[0055] In the above-mentioned embodiment 1 and the above-mentioned embodiment 2, a seam opening is provided at one end of the connecting gap 23 facing the outer side of the hollow plate 100, and the edge sealing portion 334 is used to fill the seam opening.

[0056] In this embodiment, the seam is formed between the edges of the two folding parts 20. The edge sealing portion 334 can not only abut against the edge of the folding part 20, but also fill the seam so that the seam will not leak out, thereby making the corners of the hollow plate 100 smoother and preventing hands from being cut.

[0057] In the above-mentioned Embodiment 1 and Embodiment 2, the upper end of the edge sealing portion 334 is flush with the upper end of the hemming component 20 , and the lower end of the edge sealing portion 334 is flush with the lower end surface of the base plate 10 .

[0058] With such arrangement, after the folding component 20 is connected via the connecting component 30, its upper end surface and lower end surface are both in a flush state, thereby further making the connecting portion of the folding component 20 smoother.

[0059] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hollow plate, characterized in that: include: substrate; A plurality of folding parts, wherein the folding parts are respectively arranged on four sides of the substrate, and the folding parts are sequentially enclosed to form a hollow cavity with the substrate, and the folding parts include side portions and a folding portion folded from the side portions to the hollow cavity; A connecting component, wherein the connecting component is disposed at a connection position of two adjacent folding components, the connecting component abuts against the two adjacent folding components, and connects the two adjacent folding components; and A cover plate is arranged to cover the hollow cavity.

2. The hollow plate according to claim 1, characterized in that: The connecting component includes an upper mating component, a lower mating component and a plug-in component. The upper mating component is snap-fitted with the two adjacent trimming parts to connect the two adjacent folding parts. The lower mating component abuts between the base plate and the upper mating component, and at the same time abuts against the two adjacent side parts. A connecting gap is provided between the two adjacent folding parts. The plug-in component passes through the connecting gap to the hollow cavity to connect the lower mating component and the folding part.

3. The hollow plate according to claim 2, characterized in that: An L-shaped through groove is provided on the top of the upper matching piece, and two plug-in protrusions are provided in the L-shaped through groove. A card slot is provided at the lower end of each of the two adjacent edge trimming parts, and the two card slots are respectively engaged with the two plug-in protrusions, so that the upper matching piece connects the two adjacent folding parts from bottom to top.

4. The hollow sheet material according to claim 3, characterized in that: The upper matching piece has a first elastic convex at the bottom and a socket at the top. When the lower matching piece abuts between the substrate and the upper matching piece, the first elastic convex is inserted into the socket to limit the movement of the lower matching piece relative to the upper matching piece.

5. The hollow sheet material according to claim 4, characterized in that: The lower fitting is provided with an elastic bayonet and a first inner cavity connected to the elastic bayonet. After the lower fitting and the upper fitting are assembled in place, the elastic bayonet faces the connecting gap. The plug-in component includes an edge sealing portion and a latching protrusion arranged in opposite directions. When the latching protrusion is inserted from the elastic bayonet and latched in the first inner cavity, the edge sealing portion abuts against the edge of the folding component.

6. The hollow plate according to claim 3, characterized in that: The hollow plate also includes an edge portion, which is arranged at the connection between the base plate and one of the side edge portions and extends from the side edge portion in a direction away from the base plate. The edge portion has a second inner cavity connected to the hollow cavity. The lower matching piece is provided with an inserting portion that can be inserted into the second inner cavity, and an abutting portion connected to the inserting portion, and the abutting portion is used to abut the side edge portion provided with the edge portion.

7. The hollow plate according to claim 6, characterized in that: A second elastic latch is provided on one side of the lower fitting member close to the side portion, and the connector includes an edge sealing portion and a limiting portion which are arranged opposite to each other, and the limiting portion is provided with a latch interface. When the connector passes from the connecting gap to the hollow cavity, the limiting portion is abutted between the side portion and the lower fitting member, and the second elastic latch is snapped into the latch interface, and the edge sealing portion abuts against the edge of the folding component.

8. The hollow plate according to claim 7, characterized in that: A sliding groove is provided at the bottom of the upper mating piece, and a sliding bar that slidably cooperates with the sliding groove is provided at the top of the lower mating piece. When the upper mating piece connects two adjacent folding parts, the sliding groove cooperates with the sliding bar to slide the lower mating piece to limit the position, so that a accommodating space for inserting the connector is formed between the side of the lower mating piece where the second elastic latch is provided and the adjacent side portion.

9. The hollow plate according to claim 5, 7 or 8, characterized in that: The connecting gap is provided with a joint opening at one end thereof facing the outer side of the hollow plate, and the edge sealing portion is used to fill the joint opening.

10. The hollow plate according to claim 9, characterized in that: The upper end of the edge sealing portion is flush with the upper end of the folding component, and the lower end of the edge sealing portion is flush with the lower end surface of the base plate.

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