Metal tool car with double-opening top

Abstract

The utility model provides a metal tool car with a double-open top. The metal tool car comprises a tool car body and two sets of countertops. A storage cavity with an upward opening is formed in the top of the tool car body; the two groups of countertops are respectively arranged at a cavity opening of the storage cavity left and right, and are respectively connected with the tool car body through sliding mechanisms, so that the two groups of countertops can respectively slide along the left and right directions, and the storage cavity can be opened or closed; the adjacent edges of the two groups of countertops are matched with each other, so that the two groups of countertops are spliced to form a working table when the storage cavity is in a closed state; each group of deck plates are respectively positioned above the tool car body; and a gap is reserved between each group of deck plates and the top of the cavity wall of the storage cavity. The metal tool car has the top storage function and the convenient tool taking and placing function, large tools can be easily taken and placed in a labor-saving mode, the human engineering requirement is met, the falling risk can be avoided, and good safety is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tool carts, and more specifically, to a metal tool cart with double-opening tops. Background Art

[0002] Most of the metal tool carts on the market at present are of a drawer storage structure. However, if large tools with large volume and heavy weight are placed in the upper drawer, when the drawer is pulled out, the metal tool cart will have a relatively high center of gravity and deviate from the support surface, resulting in loss of balance and tipping over, posing a safety hazard; but if the large tools with large volume and heavy weight are placed in the lower drawer, although the risk of tipping over of the metal tool cart can be reduced, workers need to squat or bend down to pick up the large tools with large volume and heavy weight, which does not conform to ergonomics and will increase the physical fatigue and discomfort of workers during work.

[0003] The tops of some metal tool carts adopt a flip-top storage structure; for such metal tool carts, large tools can be placed in the flip-top storage space at the top, and even when picking up tools, the problem of center of gravity deviation of the metal tool cart will not occur, and workers do not need to squat or bend down to pick up. However, for such metal tool carts, the top is a cover body, and the cover body tilts when opened; therefore, it is difficult to place items on the top of the metal tool cart. Even if the items are temporarily placed on the cover body, they need to be removed when opening the cover, and the items on the cover top need to be moved frequently, which is very inconvenient to use.

[0004] Therefore, there is a need to design a metal tool cart that combines the functions of placing items on the top and convenient access to tools. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects and deficiencies in the prior art, and provide a metal tool cart with double-opening tops; the metal tool cart combines the functions of placing items on the top and convenient access to tools, is conducive to the labor-saving and easy access to large tools, meets the ergonomic requirements, and can avoid the risk of tipping over, and has good safety.

[0006] To achieve the above purpose, the utility model is realized through the following technical solutions: a metal tool cart with double-opening tops, including a tool cart body and two groups of table panels; an upward-opening storage cavity is provided at the top of the tool cart body; the two groups of table panels are respectively arranged on the left and right at the opening of the storage cavity, and are respectively connected to the tool cart body through sliding mechanisms, so as to realize the sliding of the two groups of table panels in the left and right directions respectively, thereby realizing the opening or closing of the storage cavity; the adjacent sides of the two groups of table panels match each other, so that when the storage cavity is in a closed state, the two groups of table panels are combined to form a workbench surface; each group of table panels is located above the tool cart body; a gap is left between each group of table panels and the top of the cavity wall of the storage cavity.

[0007] In this utility model, a storage cavity with an upward opening is provided at the top of the tool cart body. The two side table panels slide towards each other in the left - right direction to close the top storage cavity or slide away from each other to open the top storage cavity. Large tools are placed in the storage cavity, and workers do not need to squat or bend down to pick them up, which conforms to ergonomics and is labor - saving and convenient for picking up; Tools can be picked up from the storage cavity around the metal tool cart, making it more convenient to use; When picking up the tools stored in the storage cavity, the center of gravity of the metal tool cart will not shift outside the support surface, avoiding the risk of tipping over; Moreover, whether the storage cavity is open or closed, the two groups of table panels do not need to be flipped and always remain horizontal, and there is no need to move the items on the table panel when opening the storage cavity; It takes into account both the function of placing items on the top and the convenient picking up and placing of tools. The workbench surface formed by the two groups of table panels provides an operating platform for workers. There are gaps between each group of table panels and the top of the cavity wall of the storage cavity, which can prevent friction noise, mutual scratching, damage and jamming caused by friction between the table panel and the top of the cavity wall of the storage cavity.

[0008] Preferably, the workbench surface adopts one of the following schemes:

[0009] Scheme 1: The workbench surface is a concave structure 1 with a lower height in the middle and a higher height at the edges;

[0010] Scheme 2: Each table panel of the workbench surface is a concave structure 2 with a lower height in the middle and a higher height at the edges.

[0011] The concave structure 1 and the concave structure 2 can prevent the parts on the workbench surface from slipping.

[0012] Preferably, the table panel adopts one of the following methods:

[0013] Method 1: The table panel includes a hollow metal plate on the table surface and a filling layer; The filling layer is arranged between the top plate and the bottom plate of the hollow metal plate on the table surface;

[0014] Method 2: The table panel adopts a board - wood type table panel.

[0015] The table panels set by the two methods both have good mechanical strength and load - bearing capacity, can withstand the impact force of operations such as knocking, avoid deformation of the table panel, and extend the service life.

[0016] Preferably, the sliding mechanism refers to a slide rail mechanism; The two groups of table panels are respectively connected to the tool cart body through the slide rail mechanism.

[0017] Preferably, the slide rail mechanism includes a slide rail and a slide rail seat that can be slidably connected to each other; The slide rail seats are respectively arranged on the front and rear side cavity walls of the storage cavity; The slide rails are respectively arranged below each group of table panels.

[0018] Preferably, installation parts are respectively formed by inward extension at the top parts of the front and rear side walls of the storage cavity; the slide rail bases are respectively connected to the installation parts.

[0019] Preferably, the installation parts are integrally formed with the cavity wall of the storage cavity; the side of the installation part close to the cavity wall of the storage cavity is higher in height, and the side far from the cavity wall of the storage cavity is lower in height. This structure is simple and convenient for production, processing and assembly. The side with the lower height of the installation part is convenient for accommodating connecting parts (such as screw heads), reducing the gap between the table top plate and the top of the cavity wall of the storage cavity.

[0020] Preferably, a C-shaped connecting strip and an under-table sealing plate are arranged below the table top plate; the C-shaped connecting strip and the under-table sealing plate form a support frame for supporting the table top plate; the C-shaped connecting strip respectively forms a longitudinal installation surface and a transverse installation surface; the longitudinal installation surface is connected to the slide rail; the transverse installation surface is connected to the table top plate; the cavity wall of the storage cavity is recessed downward in the area corresponding to the under-table sealing plate to form a receiving recess for accommodating the under-table sealing plate. This method can improve the mechanical strength of the table top plate, prevent deformation of the table top plate and the connection part with the slide rail, thereby improving the supporting capacity of the table top plate; at the same time, it can also block the side gap and play a role in beautification.

[0021] Preferably, corner guards are provided at the corners of the tool cart body; the corner guards have the function of anti-collision protection.

[0022] Preferably, a power socket is further included; the power socket is arranged in the tool cart body.

[0023] Preferably, the cavity wall of the storage cavity is a sandwich structure including an inner wall and an outer wall; a storage opening is provided on the inner wall or the outer wall; a socket sealing plate is provided in front of the storage opening; an installation opening is provided on the socket sealing plate; the power socket is placed into the sandwich structure from the storage opening, and the power socket is positioned and fixed through the socket sealing plate and a positioning frame in the sandwich structure; the power-taking surface of the power socket is attached to the socket sealing plate to close the installation opening, and the socket devices on the power-taking surface of the power socket are arranged in the installation opening of the socket sealing plate.

[0024] The utility model integrates a power socket into a metal tool cart, enabling the metal tool cart to add a power connection function. When a storage opening is provided on the inner wall of the storage cavity and the power-taking surface of the power socket faces the storage cavity, it can provide a power connection for charging electric tools stored in the metal tool cart, realizing the function of charging electric tools when they are locked and stored in the metal tool cart, and avoiding tool loss. In addition, whether the power-taking surface of the power socket faces the storage cavity or faces outside the metal tool cart, it can simplify the power connection process, improve the operation convenience, and enhance the electrical safety and reliability; the power socket is fixed to the socket sealing plate, and through a compact installation method, it realizes the efficient utilization of the internal space of the metal tool cart; the power socket is separated from the storage space by the socket sealing plate, which can not only protect the power socket from damage caused by tools, but also prevent the power socket from blocking and hindering the taking and placing of tools.

[0025] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0026] 1. The top double-opening metal tool cart of the utility model takes into account the functions of placing items on the top and conveniently taking and placing tools, which is beneficial for labor-saving and easy taking and placing of large tools, meets the ergonomic requirements, and can avoid the risk of tipping, having good safety; the workbench surface formed by splicing two sets of table panels provides an operating platform for workers.

[0027] 2. The utility model can prevent the table panel from rubbing against the top of the cavity wall of the storage cavity, resulting in frictional noise, as well as mutual scratching, damage and jamming; tools can be taken from the storage cavity around the metal tool cart, making it more convenient to use.

[0028] 3. In the utility model, the recessed structure of the workbench surface can prevent parts on the workbench surface from slipping; it can also serve as a gripping position for pulling out the table panel.

[0029] 4. In the utility model, the table panel has good mechanical strength and load-bearing capacity, can withstand the impact force of operations such as knocking, avoid deformation of the table panel, and extend the service life; the under-table sealing plate and the C-shaped connecting strip form a support frame to support the table panel, strengthen the supporting force of the guide rail, and the under-table sealing plate blocks the side gaps, playing a role in ensuring aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is one of the structural schematic diagrams of the top double-opening metal tool cart of the utility model;

[0031] Figure 2 is the second structural schematic diagram of the top double-opening metal tool cart of the utility model;

[0032] Figure 3 is a cross-sectional view of the upper part of the top double-opening metal tool cart of the utility model;

[0033] Figure 4 is an exploded view of the top double-opening metal tool cart of the present utility model;

[0034] Figure 5 is a schematic structural view of the tabletop panel of the top double-opening metal tool cart of the present utility model;

[0035] Figure 6 is a schematic structural view of the top double-opening metal tool cart of Embodiment II;

[0036] Figure 7 is an exploded view of the top double-opening metal tool cart of Embodiment II;

[0037] Figure 8 is a schematic structural view of the top double-opening metal tool cart of Embodiment III;

[0038] Figure 9 is an exploded view of the top double-opening metal tool cart of Embodiment III;

[0039] Among them, 1 is the tool cart body, 2 is the storage cavity, 3 is the tabletop panel, 3.1 is the hollow metal plate of the tabletop, 3.2 is the filling layer, 4 is the under-table sealing plate, 5 is the sliding rail mechanism, 6 is the gap, 7 is the C-shaped connecting strip, 8 is the corner guard, 9 is the decorative cover, 10 is the drawer, 11 is the wheel, 12 is the handle, 13 is the socket sealing plate, 14 is the power socket, 15 is the protection coil, 16 is the installation part, 17 is the accommodating recess, 18 is the placing opening, 19 is the positioning rack, and 20 is the installation opening. Specific Embodiments

[0040] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] Embodiment I

[0042] As Figures 1 to 5 shown, a top double-opening metal tool cart in this embodiment includes a tool cart body 1 and two groups of tabletop panels 3; a storage cavity 2 with an upward opening is provided at the top of the tool cart body 1; the two groups of tabletop panels 3 are respectively arranged on the left and right of the cavity opening of the storage cavity 2, and are respectively connected to the tool cart body 1 through a sliding mechanism 5, so as to realize the left-right sliding of the two groups of tabletop panels 3 respectively, thereby realizing the opening or closing of the storage cavity 2.

[0043] The two groups of tabletop panels 3 respectively include a hollow metal plate 3.1 of the tabletop and a filling layer 3.2; the filling layer 3.2 is arranged between the top plate and the bottom plate of the hollow metal plate 3.1 of the tabletop. The tabletop panel arranged in this way has good mechanical strength and load-bearing capacity, can withstand the impact force of operations such as knocking, avoid deformation of the tabletop panel, and extend the service life. In actual application, if the requirement for the mechanical strength of the tabletop panel is relatively low, the tabletop panel can also be formed only by sheet metal of the metal plate without adding a filling layer.

[0044] The adjacent sides of the two sets of table tops 3 match each other so that when the storage cavity 2 is in a closed state, the two sets of table tops 3 are joined together to form a work surface. In this embodiment, the work surface is preferably a recessed structure one with a lower height in the middle and a higher height at the edges; in actual application, the work surface can also be preferably a recessed structure two in which each set of table tops of the work surface has a lower height in the middle and a higher height at the edges, that is, each set of table tops is similar to a tray. Both the recessed structure one and the recessed structure two can prevent the parts on the work surface from slipping.

[0045] Each set of table tops 3 is respectively located above the tool cart body 1; there is a gap 6 between each set of table tops 3 and the top of the cavity wall of the storage cavity 2. The gap 6 can prevent the table top 3 from rubbing against the top of the cavity wall of the storage cavity 2 to generate friction noise, as well as prevent scratching, damage and jamming to each other.

[0046] The sliding mechanism refers to the slide rail mechanism 5. The slide rail mechanism 5 includes a slide rail and a slide rail seat that are slidably connected to each other; the slide rail seats are respectively arranged on the front and rear side cavity walls of the storage cavity 2; the slide rails are respectively arranged below each set of table tops 3.

[0047] On the top of the front and rear side cavity walls of the storage cavity 2, installation parts 16 extend inward respectively; the slide rail seats are respectively connected to the installation parts 16 on the cavity walls of the storage cavity 2; the installation parts 16 are integrally formed with the cavity walls of the storage cavity. This structure is simple and convenient for production, processing and assembly. One side of the installation part 16 close to the cavity wall of the storage cavity 2 is at a higher height, and the side far from the cavity wall of the storage cavity 2 is at a lower height; the side with a lower height of the installation part 16 is convenient for accommodating connecting parts (such as screw heads), and reduces the gap 6 between the table top 3 and the top of the cavity wall of the storage cavity 2.

[0048] A C-shaped connecting strip 7 and an under-table seal plate 4 are arranged below the table top 3; the C-shaped connecting strip 7 and the under-table seal plate 4 form a support frame for supporting the table top 3.

[0049] The C-shaped connecting strip 7 respectively forms a longitudinal installation surface and a transverse installation surface; the longitudinal installation surface is connected to the slide rail; the transverse installation surface is connected to the table top 3; the top of the cavity wall of the storage cavity 2 is recessed downward in the area corresponding to the under-table seal plate 4 to form a receiving recess 17. This method can improve the mechanical strength of the table top 3, prevent the table top 3 and the connection part with the slide rail from deforming, thereby improving the supporting capacity of the table top 3; at the same time, it can also block the side gaps and play a role in beautification.

[0050] In this utility model, a storage cavity 2 with an upward opening is provided at the top of the tool cart body 1. The two side table panels 3 slide towards each other in the left-right direction to close the top storage cavity 2 or slide away from each other to open the top storage cavity 2. Large tools are placed in the top storage cavity 2. Workers do not need to squat or bend down to pick them up, which conforms to ergonomics and is labor-saving and convenient to pick up. When picking up the tools stored in the storage cavity 2, the center of gravity of the metal tool cart will not shift outside the support surface, avoiding the risk of tipping over. Moreover, whether the storage cavity 2 is in the open or closed state, the two groups of table panels 3 do not need to be flipped and always remain horizontal, eliminating the need to move the items on the table panel when opening the storage cavity 2. It combines the functions of placing items on the top and conveniently picking up tools. The workbench surface formed by the combination of the two groups of table panels 3 provides an operating platform for workers.

[0051] Preferably, corner guards 8 are provided at the corners of the tool cart body; the corner guards 8 have the function of anti-collision protection.

[0052] Embodiment 2

[0053] The difference between a top double-opening metal tool cart in this embodiment and that in Embodiment 1 is as follows: As Figure 6 and Figure 7 shown, in this embodiment, the top double-opening metal tool cart further includes a power socket 14; the power socket 14 is arranged in the tool cart body 1.

[0054] The cavity wall of the storage cavity is a sandwich structure including an inner wall and an outer wall; a storage opening 18 is provided on the outer wall; a socket sealing plate 13 is provided in front of the storage opening 18; an installation opening 20 is provided on the socket sealing plate 13; the power socket 14 is placed into the sandwich structure from the storage opening 18, and the power socket 14 is positioned and fixed through the socket sealing plate 13 and a positioning frame 19 in the sandwich structure; the power-taking surface of the power socket 14 is attached to the socket sealing plate 13 to close the installation opening 20, and the socket devices on the power-taking surface of the power socket 14 are arranged in the installation opening 20 of the socket sealing plate 13; the socket devices include sockets, or sockets and socket switches.

[0055] This utility model integrates the power socket 14 into the metal tool cart, enabling the metal tool cart to add a power connection function. The power-taking surface of the power socket 14 faces outside the metal tool cart, and the socket devices are arranged on the outside of the metal tool cart, facilitating the plugging of electric tools, simplifying the power connection process, improving the operation convenience, and enhancing the electrical safety and reliability; the power socket 14 is fixed to the socket sealing plate 13, and through a compact installation method, the internal space of the metal tool cart is utilized efficiently; the power socket 14 is separated from the storage space by the socket sealing plate 13, which can not only protect the power socket 14 from damage caused by tools but also prevent the power socket 14 from blocking and hindering the picking up and placing of tools.

[0056] The socket cover plate 13 is preferably covered outside the storage opening 18 by a snap-fastening method; for example, in this embodiment, the socket cover plate 13 is provided with a number of hooks in the same direction, and corresponding positions on the cavity wall of the storage cavity are provided with snap holes. The socket cover plate 13 is installed by snapping the hooks into the snap holes, which is simple and convenient for installation and can reduce the use of connecting parts such as screws.

[0057] The remaining structures of this embodiment are the same as those of the first embodiment.

[0058] Embodiment Three

[0059] The difference between the top double-opening metal tool cart of this embodiment and the first embodiment is that: as Figure 8 and Figure 9 shown, in this embodiment, the top double-opening metal tool cart further includes a power socket 14; the power socket 14 is arranged in the tool cart body 1.

[0060] The cavity wall of the storage cavity is a sandwich structure including an inner wall and an outer wall; the inner wall is provided with a storage opening 18; a socket cover plate 13 is provided in front of the storage opening 18; the socket cover plate 13 is provided with an installation opening 20; the power socket 14 is placed into the sandwich structure from the storage opening 18, and the power socket 14 is positioned and fixed by the socket cover plate 13 and the positioning frame 19 in the sandwich structure; the power-taking surface of the power socket 14 is attached to the socket cover plate 13 to close the installation opening 20, and the socket devices on the power-taking surface of the power socket 14 are arranged in the installation opening 20 of the socket cover plate 13; the socket devices include sockets, or sockets and socket switches.

[0061] The present utility model integrates the power socket 14 into the metal tool cart, enabling the metal tool cart to have a power connection function. When the inner wall of the storage cavity is provided with a storage opening 18 and the power-taking surface of the power socket 14 faces the storage cavity, it can provide a power connection for charging the electric tools stored in the metal tool cart, realizing the function of charging the electric tools when they are locked and stored in the metal tool cart, and avoiding the loss of tools. In addition, it can simplify the power connection process, improve the convenience of operation, and improve the safety and reliability of power use; the power socket 14 is fixed to the socket cover plate 13, and through a compact installation method, the internal space of the metal tool cart can be utilized efficiently; the power socket 14 is separated from the storage space by the socket cover plate 13, which can not only protect the power socket 14 from damage caused by tools, but also prevent the power socket 14 from blocking the taking and placing of tools.

[0062] The socket cover plate 13 is preferably covered outside the storage opening 18 by a snap-fastening method; for example, in this embodiment, the socket cover plate 13 is provided with a number of hooks in the same direction, and corresponding positions on the cavity wall of the storage cavity are provided with snap holes. The socket cover plate 13 is installed by snapping the hooks into the snap holes, which is simple and convenient for installation and can reduce the use of connecting parts such as screws.

[0063] The remaining structure of this embodiment is the same as that of the first embodiment.

[0064] Embodiment 4

[0065] A top double-opening metal tool cart according to this embodiment is different from that of the first embodiment in that: in this embodiment, the table top board adopts a board-wood type table top board, such as a solid wood table top board, a sandwich board table top board, a medium density fiberboard table top board, etc.; the workbench surface composed of two groups of table top boards is preferably a concave structure one with a lower height in the middle and a higher height at the edge; or each table top board of the workbench surface is a concave structure two with a lower height in the middle and a higher height at the edge.

[0066] The remaining structure of this embodiment is the same as that of the first embodiment, the second embodiment or the third embodiment.

[0067] Embodiment 5

[0068] A top double-opening metal tool cart according to this embodiment is different from that of the first embodiment in that: in this embodiment, the under-table sealing board of each table top board is divided into multiple sections, corresponding to the ends of the guide rails to achieve the shielding and sealing of the ends of the guide rails.

[0069] The remaining structure of this embodiment is the same as that of the first embodiment, the second embodiment or the third embodiment.

[0070] The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A metal tool cart with double top opening, characterized in that: It includes a tool trolley body and two sets of table panels; a storage cavity with an opening upward is provided on the top of the tool trolley body; the two sets of table panels are arranged on the left and right sides of the cavity opening of the storage cavity, and are respectively connected to the tool trolley body through sliding mechanisms to enable the two sets of table panels to slide in the left and right directions respectively, thereby realizing the opening or closing of the storage cavity; the adjacent edges of the two sets of table panels match each other, so that the two sets of table panels are assembled to form a work surface when the storage cavity is in a closed state; each set of table panels is located above the tool trolley body; each set of table panels has a gap with the top of the cavity wall of the storage cavity.

2. The top double-opening metal tool cart according to claim 1, characterized in that: The work surface adopts one of the following solutions: Solution 1: The work surface is a concave structure with a low middle height and high edge height; Solution 2: Each set of table panels of the work surface is a concave structure 2 with a low middle height and a high edge height.

3. The top double-opening metal tool cart according to claim 1, characterized in that: The table top adopts one of the following methods: Method 1: The table top comprises a table top hollow metal plate and a filling layer; the filling layer is arranged between the top plate and the bottom plate of the table top hollow metal plate; Method 2: The countertop uses a wooden countertop.

4. The top double-opening metal tool cart according to any one of claims 1 to 3, characterized in that: The sliding mechanism refers to a slide rail mechanism; the two sets of table panels are connected to the tool vehicle body through the slide rail mechanism respectively; The slide rail mechanism comprises a slide rail and a slide rail seat which are slidably connected to each other; the slide rail seats are respectively arranged on the front and rear side walls of the storage cavity; and the slide rails are respectively arranged under each group of table panels.

5. The top double-opening metal tool cart according to claim 4, characterized in that: The tops of the front and rear side walls of the storage cavity respectively extend inwards to form mounting parts; and the slide rail seats are respectively connected to the mounting parts.

6. The top double-opening metal tool cart according to claim 5, characterized in that: The mounting portion is integrally formed with the cavity wall of the storage cavity; the mounting portion has a higher height on one side close to the cavity wall of the storage cavity and a lower height on the other side away from the cavity wall of the storage cavity.

7. The top double-opening metal tool cart according to claim 5, characterized in that: A C-shaped connecting strip and an under-table cover plate are arranged under the table panel; the C-shaped connecting strip and the under-table cover plate constitute a support frame for supporting the table panel; the C-shaped connecting strip forms a longitudinal mounting surface and a transverse mounting surface respectively; the longitudinal mounting surface is connected to the slide rail; the transverse mounting surface is connected to the table panel; the cavity wall of the storage cavity is recessed downward in the area corresponding to the under-table cover plate, forming a accommodating recess for accommodating the under-table cover plate.

8. The top double-opening metal tool cart according to any one of claims 1 to 3, characterized in that: Corner guards are provided at the corners of the tool trolley body.

9. The top double opening metal tool cart according to any one of claims 1 to 3, characterized in that: It also includes a power socket; the power socket is arranged in the tool vehicle body.

10. The top double-opening metal tool cart according to claim 1, characterized in that: The cavity wall of the storage cavity is a sandwich structure including an inner wall and an outer wall; the inner wall or the outer wall is provided with a storage opening; the front cover of the storage opening is provided with a socket sealing plate; the socket sealing plate is provided with an installation opening; the power socket is placed from the storage opening into the sandwich structure, and the power socket is positioned and fixed by the socket sealing plate and the positioning frame in the sandwich structure; the power supply surface of the power socket is fitted with the socket sealing plate to close the installation opening, and the socket components on the power supply surface of the power socket are arranged in the installation opening of the socket sealing plate.

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