Multi-piece assembled enclosed space device

Abstract

This invention provides a multi-piece assembled enclosed space device, consisting of a base and multiple wall panel structures to form a quickly assembled enclosed space. The base includes a main base plate, a decorative surface layer, and a side structure. The main base plate comprises a base substrate, a honeycomb aluminum slot, a filling layer, and a surface structural layer, with the decorative surface layer fixed by adhesive. The side structure surrounds the main base plate and includes a first side plate and a first bottom plate for stable support. The wall panel structure consists of a main panel, a decorative surface layer, and a first edge-sealing structure. The main panel features a honeycomb aluminum slot and a filling layer to enhance strength and waterproof performance. The wall panel structures are connected via fasteners, which have connection parts and a waist section corresponding to the first bottom slot and first neck, ensuring secure assembly. This device enables modular installation, making it suitable for temporary buildings, waterproof enclosed spaces, and movable structures, overcoming the time-consuming and immovable limitations of traditional construction, thereby improving construction efficiency and flexibility.

Description

[Technical Field]

[0001] This invention relates to the field of building construction technology, and in particular to a multi-piece assembled closed space device. [Previous Technology]

[0002] In modern architecture and interior decoration projects, the construction of enclosed spaces typically relies on traditional construction methods, such as bricklaying, concrete pouring, steel structure welding, and gypsum board assembly. While these methods are well-developed and widely used in residential, commercial, industrial, and other public spaces, they still have many limitations. For example, the construction of traditional building structures requires extensive on-site work, including foundation laying, rebar tying, formwork installation, concrete pouring, plastering, waterproofing, and finishing. Because concrete, cement mortar, or waterproofing materials require time to dry and cure, this extends the construction time, making it difficult to shorten the overall project duration. Furthermore, on-site construction involves a large amount of wet work, making it susceptible to weather conditions. Rain or high humidity can lead to a decline in construction quality or delays in the project schedule.

[0003] Besides the long construction period, traditional construction methods also face the problem of spatial immutability. Once the structure is completed, the walls and floors are basically fixed and cannot be flexibly adjusted. If spatial changes are required, it is often necessary to demolish part of the structure, generating a large amount of construction waste and increasing the cost of subsequent decoration and renovation. At the same time, since the walls and floors are mostly assembled with cement, brick walls or plasterboard, they are heavy and not conducive to subsequent demolition, relocation or reuse. This immobility makes traditional construction methods unsuitable for temporary buildings that need to be quickly erected and dismantled, such as exhibition halls, temporary offices, emergency disaster relief facilities or mobile isolation wards.

[0004] Waterproofing is also a common challenge in traditional construction. Traditional waterproofing methods typically involve applying waterproof coatings, laying waterproof membranes, or injecting waterproof mortar. However, these methods have certain technical barriers and are easily affected by the construction environment and the skill of the workers, leading to defects in the waterproof layer, such as bubbles, cracks, or uneven application, thus affecting the waterproofing effect. Furthermore, waterproofing materials still need to dry after application. If subsequent work is carried out before they are fully cured, the waterproof layer may be damaged or fail, affecting the building's lifespan and maintenance costs. Therefore, in environments requiring high levels of waterproofing, such as basements, bathrooms, laboratories, and medical isolation spaces, traditional construction methods cannot ensure long-term stable waterproofing performance, thus affecting the durability and safety of the space.

[0005] Based on the above issues, the market demand for modular enclosed space equipment that can be quickly constructed, is waterproof, and can be repeatedly disassembled and reassembled is increasing. In recent years, precast construction technology and modular construction have gradually gained attention. By using prefabricated building components in factories and quickly assembling them on-site, on-site construction time can be effectively reduced, and construction costs and labor requirements can be lowered. However, modular products currently on the market still have certain limitations, such as limited material selection, inflexible assembly methods, and unstable waterproofing effects. Therefore, further innovation is needed to address the shortcomings of traditional construction methods and improve the practicality and mobility of enclosed space equipment. [Summary of the Invention]

[0006] Therefore, the object of the present invention is to provide a multi-piece assembled closed space device, which consists of a chassis and a plurality of wall panel structures surrounding the chassis to form a space, characterized in that:

[0007] The chassis includes a main base plate, a decorative layer, and a side structure. The main base plate includes a chassis substrate, a honeycomb aluminum channel disposed on the chassis substrate, a filling layer filling the gaps inside the honeycomb aluminum channel, and a surface structure layer disposed on the honeycomb aluminum channel. The decorative layer is fixed to the surface structure layer by an adhesive. The side structure surrounds the peripheral wall of the main base plate and the decorative layer. The side structure has a first side plate and a first base plate adjacent to the first side plate. The height of the first side plate is higher than the height of the decorative layer, and the height of the first base plate is lower than the height of the decorative layer.

[0008] The wall panel structure includes a main panel, the finishing layer, and a first edge sealing structure. The main panel includes a wall substrate and a honeycomb aluminum channel disposed on one side of the wall substrate. The filling layer fills the gaps inside the honeycomb aluminum channel, and the surface structure layer is disposed on the other side of the honeycomb aluminum channel. The finishing layer is fixed to the surface structure layer by an adhesive. The first edge sealing structure is disposed on the sidewalls of the main panel and the finishing layer. The first edge sealing structure has a first bottom groove and a first neck. The width of the first bottom groove is greater than that of the first neck.

[0009] A fastener having connecting portions with the same configuration at both ends and a tapered waist in the middle, the connecting portions having a configuration corresponding to the first bottom groove and the waist having a configuration corresponding to the first neck; thereby, the wall panel structures are connected to each other and surround the chassis through the fastener.

[0010] The main base plate is provided with a notch, and the first base plate has an insert for inserting into the notch.

[0011] The side structure has a grounding portion, which is connected to the chassis substrate.

[0012] Wherein, the filling layer extends between the first base plate and the grounding portion.

[0013] The side structure includes a second side plate and a second bottom plate.

[0014] The wall panel structure is sandwiched between the second side plate and a second bottom plate.

[0015] The wall panel structure includes a second edge sealing structure, which is disposed on the surface structure layer in parallel with the finishing layer.

[0016] The second sealing structure has a second bottom groove and a second neck, wherein the width of the second bottom groove is greater than that of the second neck.

[0017] Whereinafter, the main base plate or the main body plate is provided with at least one reserved hole.

[0018] An elastic waterproof layer is provided between the main base plate and the side structure. The elastic waterproof layer is made of silicone or thermoplastic elastomer to improve the waterproof sealing performance of the chassis and reduce the impact of structural stress.

Implementation Method

[0019] To make the objectives, technical solutions and advantages of this invention clearer, the following detailed description is provided in conjunction with specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this specification should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in one or more embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Referring to Figure 1, which is a schematic diagram of a multi-piece assembled closed space device 1 proposed in this invention, the multi-piece assembled closed space device 1 is formed by a chassis 100 and a plurality of wall panel structures 200 surrounding the chassis 100 to form a space. Referring to Figure 2, which is a cross-sectional schematic diagram of the chassis 100, it includes a main base plate 110, a decorative layer 20 and a side edge structure 130. The main base plate 110 includes a chassis base plate 111, a honeycomb aluminum channel 12 disposed on the chassis base plate 111, and a filling layer 13. A surface structure layer 14 is disposed on the honeycomb aluminum channel 12, filling the gaps inside the channel. The decorative layer 20 is fixed to the surface structure layer 14 by an adhesive. The side structure 130 is disposed around the main base plate 110 and the peripheral wall of the decorative layer 20. The side structure 130 has a first side plate 131 and a first base plate 132 adjacent to the first side plate 131. The height of the first side plate 131 is higher than the height of the decorative layer 20, and the height of the first base plate 132 is lower than the height of the decorative layer 20.

[0022] Please refer to Figures 3 and 4, which are partially enlarged schematic diagrams showing the disassembled and assembled side structure 130 and main base plate 110 of the chassis 100. The main base plate 110 has a notch 115, and the first base plate 132 of the side structure 130 has an insert 1321 for embedding into the notch 115. This design ensures a stable structural connection between the first base plate 132 and the main base plate 110, enhancing overall strength and durability. The precise fit between the insert 1321 and the notch 115 reduces deformation caused by thermal expansion and contraction or external stress, improving the stability of the waterproof chassis. Furthermore, this embedding design optimizes the installation process, ensuring simple and robust assembly, making it suitable for applications requiring rapid installation and maintenance, such as industrial floors, outdoor facilities, or high-load-bearing areas.

[0023] Furthermore, the side structure 130 has a grounding portion 133, which is joined to the chassis base plate 111. In this embodiment, the joining method is welding, and the welding point 1331 is shown in Figure 4. The grounding portion 133 can improve the overall structural strength of the chassis and ensure the stability between the side structure 130 and the chassis base plate 111. Through welding, the welding point 1331 can provide a high-strength fixing effect, preventing the side structure from loosening or shifting due to external forces. In addition, the grounding portion 133 can further enhance the waterproof performance, preventing moisture from seeping into the main base plate along the side and ensuring the long-term stability of the chassis. For applications requiring impact resistance and load-bearing capacity, such as parking lots, industrial workshops, or high-humidity environments, this welding fixing method can effectively improve overall durability and safety.

[0024] Furthermore, the filler layer 13 extends between the first base plate 132 and the grounding portion 133. This allows the filler layer 13 to further enhance the overall sealing and structural strength of the chassis. The filler layer 13, extending between the first base plate 132 and the grounding portion 133, effectively fills potential gaps, preventing moisture or foreign matter from entering the chassis interior. In addition, the filler layer 13 (such as polyurethane or other elastic filler materials) can absorb a certain amount of external impact and vibration, reducing the impact on the structure and improving durability and stability. This characteristic is particularly suitable for humid environments or high-frequency use areas, such as around swimming pools, bathrooms, outdoor balconies, or industrial equipment platforms, to ensure waterproof sealing and structural integrity during long-term use.

[0025] Furthermore, please refer to Figure 1, where the main base plate 110 is provided with at least one reserved hole 160. The design of the reserved hole 160 allows the chassis to be functionally expanded and customized according to different application needs, such as installing additional fixing devices, drainage systems, or wiring conduits. The position and size of the reserved hole 160 can be adjusted according to the usage environment to ensure optimal structural strength and installation convenience. For example, in scenarios requiring drainage, the reserved hole 160 can serve as a drainage hole, ensuring rapid drainage of water and preventing water accumulation from affecting the durability and stability of the chassis. In smart building or industrial applications, the reserved hole 160 can also be used for wiring installation, such as cables, sensors, or other electronic devices, providing more flexible configuration options. In addition, in applications with detachable or modular structures, the reserved hole 160 can be used to connect different modules or fix additional components, improving the convenience of installation and maintenance. Furthermore, its configuration can be changed according to needs, such as the drain hole 161 shown in Figure 1, or the drain pipe 162 to receive water discharged from, for example, a hand sink (not shown).

[0026] Furthermore, reinforcing ribs 116 are provided inside the honeycomb aluminum channel 12 to provide additional structural strength and improve the chassis's pressure resistance. The design of the reinforcing ribs 116 further enhances the structural rigidity of the honeycomb aluminum channel 12, enabling the chassis to withstand greater loads and pressures, making it particularly suitable for environments with high strength requirements, such as industrial floors, machinery platforms, and large building support bases. The reinforcing ribs 116 can effectively disperse stress, reduce local deformation and stress concentration problems, thereby improving the chassis's compressive, bending, and impact resistance. In addition, when the chassis is used in outdoor environments or areas with large temperature variations, the reinforcing ribs 116 can reduce structural fatigue caused by thermal expansion and contraction of materials, extending service life. When combined with a filling layer 13 (such as polyurethane or other high-strength filling materials), the overall structural rigidity and durability can be further improved, ensuring that the waterproof chassis still has excellent performance and stability in different environments.

[0027] It should be noted that the combination of the honeycomb aluminum channel 12 and the filling layer 13 effectively improves the compressive strength of the overall structure and reduces the risk of deformation and cracking. The surface structure layer 14 further enhances wear resistance, water resistance, and chemical corrosion resistance, making it suitable for long-term use and environments with low maintenance requirements. The finishing layer 20 can be made of different materials, such as ceramic tiles, stone, or other decorative layers, to meet the aesthetic and functional requirements of different locations.

[0028] The surface structure layer 14 comprises fiber-reinforced plastic (FRP), which is laid on the honeycomb aluminum channel 12 and tightly bonded to the finishing layer 20. FRP has excellent mechanical strength, corrosion resistance, and weather resistance, enabling the chassis to resist moisture, chemical corrosion, and physical wear during long-term use. In addition, FRP is lightweight and highly rigid, which can effectively improve the stability of the overall structure while reducing weight, making it suitable for applications with high load-bearing requirements, such as public facilities, outdoor buildings, or industrial equipment platforms.

[0029] The finishing layer 20 is composed of a plurality of ceramic tiles arranged at intervals, with grout filling the gaps 21 between the tiles. The tile material can be selected according to actual needs, such as ceramic tiles, quartz tiles, or natural stone, to provide different aesthetic effects and wear resistance. The grout for the gaps 21 between the tiles can be a material with good waterproof and weather-resistant properties, such as epoxy grout or silicone grout, to ensure a good sealing effect in humid environments, prevent moisture from penetrating into the chassis, and thus extend the service life of the overall structure. In addition, this interval arrangement design can be adjusted according to different needs, such as increasing drainage or reducing the impact of thermal expansion, improving adaptability and durability.

[0030] The filling layer 13 comprises a polyurethane material, which fills the gaps inside the honeycomb aluminum channel 12 and is fixedly bonded to the inner wall of the honeycomb aluminum channel 12 to form a fixed structure. The polyurethane material has excellent water resistance, heat resistance, and shock absorption properties, effectively improving the overall stability and structural strength of the chassis. Furthermore, different densities and rigidities of the polyurethane material can be selected according to application requirements to achieve optimal load-bearing and waterproofing effects. For example, high-density polyurethane can improve pressure resistance, making it suitable for high-load environments such as machinery bases or industrial floors, while low-density polyurethane can improve lightweight characteristics, making it suitable for mobile equipment or temporary building structures. Because the filling layer 13 is fixedly bonded to the inner wall of the honeycomb aluminum channel 12, it effectively prevents water vapor penetration and material delamination within the structure, ensuring long-term durability and safety.

[0031] Please refer to Figure 5, which is a cross-sectional schematic diagram of the wall panel structure 200. The wall panel structure 200 includes a main panel 210, the same decorative layer 20 as described above, and a first edge sealing structure 230. The main panel 210 includes a wall substrate 211, a honeycomb aluminum channel 12 as described above disposed on one side of the wall substrate 211, and a filling layer 13 as described above filling the gaps inside the honeycomb aluminum channel 12. The surface structure layer 14 as described above is disposed on the other side of the honeycomb aluminum channel 12. The wall substrate 211 can be composed of an all-aluminum plate, and the thickness of the wall substrate 211 can be adjusted according to the usage requirements, usually in the range of 2mm to 5mm, in order to balance lightweight and structural strength. The height of the honeycomb aluminum channel 12 can also be customized according to the needs of heat insulation, sound insulation or other applications. For example, when used on the exterior walls of buildings or for special partition requirements, a thicker honeycomb structure or a honeycomb structure with more than two layers can be selected to enhance strength and weather resistance.

[0032] The finishing layer 20 is fixed to the surface structure layer 14 by an adhesive. The adhesive used here can be a two-component epoxy resin or polyurethane adhesive with good weather resistance to ensure good adhesion between the finishing layer 20 and the surface structure layer 14, preventing peeling or deformation due to changes in ambient temperature and humidity. Furthermore, the material of the finishing layer 20 can be selected from ceramic tiles, stone, wood grain finishes, or other decorative materials according to application requirements to meet the aesthetic and functional needs of different scenarios. In this embodiment, ceramic tiles are used as an example.

[0033] The first edge sealing structure 230 is disposed on the sidewall of the main body panel 210 and the decorative layer 20. The first edge sealing structure 230 has a first bottom groove 231 and a first neck 232, the width of the first bottom groove 231 being greater than the width of the first neck 232. The design of the first edge sealing structure 230 can effectively prevent moisture from penetrating into the interior of the shelf, improving the durability of the shelf. Its material can be aluminum alloy, stainless steel, or high-strength PVC to provide different levels of corrosion resistance and aesthetic effects.

[0034] Please refer to Figures 6 and 7, which are exploded and assembled schematic diagrams of two wall panel structures 200 in one embodiment of the present invention; a fastener 300 has connecting portions 351 with the same configuration at both ends and a tapered waist portion 352 in the middle. The connecting portions 351 have a configuration corresponding to the first bottom groove 231, and the waist portion 352 has a configuration corresponding to the first neck 232; thereby, the wall panel structures 200 are connected to each other and surround the chassis 100 through the fastener 300.

[0035] Of course, in order to meet the installation requirements of water and electrical circuits required by the environment, holes can also be drilled in the wall panel structure 200, either through holes or blind holes, without affecting the structural strength of the wall panel structure 200 itself.

[0036] Accordingly, please refer to Figure 8, which is a partial perspective view of the multi-piece assembled closed space device 1. The multi-piece assembled closed space device 1 proposed in this invention can be applied to various scenarios requiring high strength, waterproofing, and pressure resistance, such as bathroom floors, kitchen floors, outdoor balconies, terraces, parking lots, and areas around swimming pools. In addition, the chassis structure can be applied to industrial fields, such as cooling equipment bases, ship decks, laboratory floors, and medical environments, ensuring stability and durability even in humid, high-load, and corrosive environments.

[0037] Please refer to Figure 9, which shows another embodiment of the wall panel structure 400 proposed in this invention. Figure 10 is a partially enlarged cross-sectional view of combining a wall panel structure 200 with the wall panel structure 400, which includes a second edge sealing structure 240, arranged side by side with the finishing layer 20 on the surface structure layer 14. The second edge sealing structure 240 has a second bottom groove 241 and a second neck 242, the width of the second bottom groove 241 being greater than the width of the second neck 242. As can be seen from Figure 10, when the first edge sealing structure 230 of the wall panel structure 200 is aligned with the second edge sealing structure 240 of the wall panel structure 400, the wall panel structure 200 is combined with the wall panel structure 400 through the fastener 300. Please refer to Figure 11, which is a three-dimensional schematic diagram of the wall panel structure 200 combined with another wall panel structure 400, with a combination angle A of 90 degrees.

[0038] Please refer to Figure 12, which is a cross-sectional schematic diagram of another embodiment of the chassis 500. The side structure 130 of this chassis 500 further includes a second side plate 134 and a second bottom plate 135. The second side plate 134 and the second bottom plate 135 are used to clamp the wall panel structures 200 and 400. The advantage of this embodiment is that it eliminates the need for additional fixing elements such as nails, screws, or adhesives. Instead, the clamping design between the second side plate 134 and the first side plate 131 ensures that the wall panel structures 200 and 400 can be stably positioned, improving the convenience of assembly and structural strength. In addition, this clamping mechanism can provide a more uniform stress distribution, reduce structural deformation or damage caused by local stress concentration, and further improve overall durability.

[0039] This embodiment is applicable to modular buildings or temporary structures that require rapid installation and disassembly, such as exhibition booths, temporary offices, or mobile homes. Users only need to insert the wall panel structures 200 and 400 between the second side panel 134 and the first side panel 131 to complete the assembly, without affecting the integrity of the materials or increasing construction time due to the use of nails or screws. In addition, this design also facilitates future maintenance or replacement of specific wall panel structures without disassembling the entire structure, further improving maintenance efficiency.

[0040] It should be noted that, as shown in Figure 2, an elastic waterproof layer 140 is provided between the main base plate 110 and the side structure 130. The elastic waterproof layer 140 is made of silicone or thermoplastic elastomer TPE to improve the waterproof sealing performance of the chassis and reduce the impact of structural stress.

[0041] The design of the elastic waterproof layer 140 effectively fills the gap between the main base plate 110 and the side structure 130, preventing moisture from penetrating into the chassis interior and thus improving the overall waterproof performance. Both silicone and thermoplastic elastomer (TPE) possess excellent elasticity and weather resistance, maintaining stable sealing performance during long-term use and adapting to different temperature and environmental changes. For example, in outdoor applications, the elastic waterproof layer 140 can resist the effects of rain, moisture, and ultraviolet rays, ensuring that the internal structure of the chassis is not corroded by moisture. In indoor applications, such as bathrooms, kitchens, or areas around swimming pools, this waterproof layer can prevent moisture from penetrating into the base layer, reducing the risk of mold or structural damage caused by dampness.

[0042] Furthermore, the elastic waterproof layer 140 can also buffer structural stress and reduce material deformation and cracking caused by external forces or thermal expansion and contraction. This is especially important in high-load or frequently vibrating environments, such as industrial equipment bases, parking lot floors, or ship decks. When the chassis is subjected to external impact or mechanical vibration, the elastic waterproof layer 140 can absorb some energy, reducing direct damage to the main base plate 110 and side structures 130, thereby improving the chassis's durability and structural stability.

[0043] If a higher level of sealing is required, the elastic waterproof layer 140 can be further combined with other waterproofing technologies (such as sealants, welded seals or multi-layer structural designs) to provide a more comprehensive waterproofing and stress-resistant solution, ensuring that the chassis can maintain good performance and service life in harsh environments.

[0044] Accordingly, the multi-piece assembled closed space device 1 proposed in this invention has the following advantages when applied to current building structures:

[0045] 1. Rapid assembly: The chassis adopts a modular design, and the components can be precisely fitted together, eliminating the need for complex on-site processing or secondary treatment, which greatly reduces construction time.

[0046] 2. Short construction period: The overall structure is prefabricated, the installation process is simple and does not rely on the drying and curing time of traditional waterproof coatings, and the construction can be completed in a short time, improving construction efficiency.

[0047] 3. Low cost: Through standardized production and rapid assembly, labor costs and material waste are reduced, and the overall construction and maintenance costs are lowered, making it suitable for large-scale application scenarios.

[0048] 4. Same-floor drainage: The structural design supports a same-floor drainage system, eliminating the need to raise the floor level or set a drainage slope. This avoids the increased construction difficulty and cost of traditional waterproofing projects due to the complexity of the drainage system, improves drainage efficiency, and ensures the flatness and comfort of the usable space.

[0049] However, the above description is only an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and patent specification of the present invention shall still fall within the scope of the patent of the present invention. [Simplified Explanation of the Diagram]

[0050] Figure 1 is a schematic diagram of a multi-piece assembled closed space device proposed in this invention; Figure 2 is a cross-sectional schematic diagram of the chassis in the multi-piece assembled closed space device proposed in this invention; Figure 3 is a partially enlarged exploded schematic diagram of the side structure and main base plate of the chassis; Figure 4 is a partially enlarged schematic diagram of the combination of the side structure and main base plate of the chassis; Figure 5 is a cross-sectional schematic diagram of the wall panel structure; Figures 6 and 7 are exploded and assembled schematic diagrams of the two wall panel structures in one embodiment proposed in this invention; Figure 8 is a partial perspective schematic diagram of this multi-piece assembled closed space device; Figure 9 is an embodiment of another wall panel structure 400 proposed in this invention; Figure 10 is a partially enlarged cross-sectional view of the combination of the two wall panel structures; Figure 11 is a three-dimensional schematic diagram of the combination of the two wall panel structures; Figure 12 is a cross-sectional schematic diagram of another chassis embodiment.

Claims

1. A multi-piece assembled closed space device (1), comprising a chassis (100) and a plurality of wall panel structures (200) surrounding the chassis (100) to form a space, characterized in that: the chassis (100) includes a main base plate (110), a decorative layer (20) and a side edge structure (130), the main base plate (110) includes a chassis base plate (111), a honeycomb aluminum channel (12) disposed on the chassis base plate (111), a filling layer (13) filling the gaps inside the honeycomb aluminum channel (12), and a surface structure layer (14) disposed on the honeycomb aluminum channel (12); the decorative layer (20) is bonded by an adhesive. Fixed to the surface structure layer (14); the side structure (130) surrounds the main base plate (110) and the perimeter wall of the finishing layer (20), the side structure (130) has a first side plate (131) and a first base plate (132) adjacent to the first side plate (131), the height of the first side plate (131) is higher than the height of the finishing layer (20), and the height of the first base plate (132) is lower than the height of the finishing layer (20); the wall panel structure (200) includes a main plate (210), the finishing layer (20) and a first edge sealing structure (230), wherein, The main body panel (210) includes a wall substrate (211) and a honeycomb aluminum channel (12) disposed on one side of the wall substrate (211). The filling layer (13) fills the gaps inside the honeycomb aluminum channel (12), and the surface structure layer (14) is disposed on the other side of the honeycomb aluminum channel (12). The decorative layer (20) is fixed to the surface structure layer (14) by an adhesive. The first edge sealing structure (230) is disposed on the sidewalls of the main body panel (210) and the decorative layer (20). The first edge sealing structure (230) has a first bottom groove (231) and a first neck (232). The width of the first bottom groove (231) is greater than that of the first neck (232). A fastener (300) has connecting portions (351) of the same configuration at both ends and a tapered waist (352) in the middle. The connecting portions (351) have a configuration corresponding to the first bottom groove (231), and the waist (352) has a configuration corresponding to the first neck (232). Accordingly, the wall panel structures (200) are connected to each other and surround the chassis (100) through the fastener (300).

2. The multi-piece assembled closed space device (1) according to claim 1, wherein, The main base plate (110) has a notch (115), and the first base plate (132) has an insert (1321) for inserting into the notch (115).

3. The multi-piece assembled closed space device (1) according to claim 2, wherein, The side structure (130) has a grounding portion (133) which is connected to the chassis substrate (111).

4. The multi-piece assembled closed space device (1) according to claim 3, wherein, The filler layer (13) extends between the first base plate (132) and the grounding portion (133).

5. The multi-piece assembled closed space device (1) according to claim 2, wherein, The side structure (130) includes a second side plate (134) and a second bottom plate (135).

6. The multi-piece assembled closed space device (1) according to claim 5, wherein, The wall panel structure (200) is sandwiched between the second side panel (134) and a second bottom panel (135).

7. The multi-piece assembled closed space device (1) according to claim 1, wherein, The wall panel structure (200) includes a second edge sealing structure (240) disposed on the surface structure layer (14) alongside the finishing layer (20).

8. The multi-piece assembled closed space device (1) according to claim 7, wherein, The second sealing structure (240) has a second bottom groove (241) and a second neck (242), the width of the second bottom groove (241) being greater than that of the second neck (242).

9. The multi-piece assembled closed space device (1) according to claim 1, wherein, in, The main base plate (110) or the main body plate (210) is provided with at least one reserved hole (160).

10. The multi-piece assembled closed space device (1) according to claim 1, wherein, An elastic waterproof layer (140) is provided between the main base plate (110) and the side structure (130). The elastic waterproof layer (140) is made of silicone or thermoplastic elastomer (TPE) to improve the waterproof sealing performance of the chassis and reduce the impact of structural stress.

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