Magic cube socket with wireless charging module
Through the integrated insulated bracket and conductive area design, the assembly process of the Rubik's Cube socket is simplified, and a wireless charging module is added to the top of the insulated bracket, solving the problems of complex assembly and single function, and achieving a simple and convenient multi-function Rubik's Cube socket.
Patent Information
- Application Number
- CN202422135455.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing Rubik's Cube socket has inconvenient assembly and single function. The plug-in copper plate requires multiple angle bends and multi-pass welding, resulting in complex assembly and limited functions.
The integrated insulating bracket design is adopted, and the conductive area is defined on the opposite side of the insulating bracket. The side conductive units and the intermediate conductive units are respectively snapped into different positions of the insulating bracket, simplifying the assembly process, and a wireless charging module is installed on the top of the insulating bracket to improve versatility.
It realizes a simple and convenient assembly process and versatility, the structure of the side conductive units and the intermediate conductive units is clear, and the wireless charging function is added, which improves the practicality of the Rubik's Cube socket.
Smart Images

Figure CN223066508U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of household appliances, and particularly relates to a Rubik's cube socket with a wireless charging module. Background Art
[0002] At present, a power strip is a multi-port socket with a wire, also called a power strip or socket strip. It can connect more than one power plug, saving both space and wiring. To improve the compactness of the power strip structure and ensure a sufficient number of interfaces on the power strip, its shape is set to be a cube shape similar to a Rubik's cube, also called a Rubik's cube socket.
[0003] A Rubik's cube socket in the prior art, with the publication number CN219144545U, forms an insulating bracket through stacked insulating top plates, first insulating partitions, second insulating partitions and insulating top plates, and inserts electric copper sheets are arranged between adjacent partitions. The inserted electric copper sheet is a single component, and a plug-in part extends on each surface of the inserted electric copper sheet, and each plug-in part is connected through an electrode sheet. As a result, the electrode sheets need to be bent at multiple angles to be connected to each other. Since the production of a single inserted electric copper sheet requires multiple weldings, and the mutual superposition of multiple insulating plates, the inserted electric copper sheets between different plates need multiple bent copper wires to connect the plug-in module, resulting in inconvenient assembly of this kind of Rubik's cube socket, and the function of this kind of Rubik's cube socket is relatively single. Summary of the Utility Model
[0004] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a Rubik's cube socket with a wireless charging module.
[0005] The above technical purpose of the present utility model is achieved through the following technical solutions: A Rubik's cube socket with a wireless charging module, comprising:
[0006] An inlet base connected to a power cord, a housing closed on the inlet base, and an insulating bracket arranged in the housing. The insulating bracket is provided with a socket assembly and a conductive assembly. The socket assembly is communicated with the conductive assembly and forms at least one plug-in surface on the surface of the housing;
[0007] Two spaced conductive regions are defined on opposite sides of the insulating bracket. The conductive assembly includes at least one side conductive unit clamped on the periphery of the conductive region and an intermediate conductive unit clamped in the middle of the conductive region. The front sides of the side conductive units in the two conductive regions on the same plug-in surface are correspondingly arranged with the socket assembly, and the intermediate conductive unit in each conductive region is connected to the inner side of the side conductive unit; and at least one intermediate conductive unit is connected to the inlet base. A wireless charging module is arranged between the insulating bracket and the top of the housing, and a wireless charging surface is defined on the top surface of the housing.
[0008] Furthermore, the insulating bracket includes a first socket unit disposed in the middle of the conductive region, a plurality of bracket units arranged on the periphery of the first socket unit, and a second socket unit defined between two bracket units. The socket assembly is docked to a second socket unit and the bracket units on both sides, and together defines a plugging surface. The first socket unit communicates with a plurality of second socket units in the same conductive region. The side conductive unit is snap-fitted into the second socket unit, and the intermediate conductive unit is snap-fitted into the first socket unit.
[0009] Furthermore, one end of the intermediate conductive unit has a connecting pin extending into the bracket unit. An opening groove corresponding to the connecting pin is provided on the bracket unit. The connecting pins and the opening grooves in the two conductive regions are arranged corresponding to each other. And a wire-in part for docking with the insulating bracket is provided in the middle of the wire-in base. The wire-in part is supported on the bottom of the insulating bracket. The wire-in part is arranged corresponding to the connecting pin and the opening groove.
[0010] Furthermore, a clamping groove matching the contour of the intermediate conductive unit is spaced between the first socket unit and the bracket unit. The intermediate conductive unit includes a connected intermediate sheet body. The intermediate sheet body is arranged corresponding to the plugging surface and is clamped in the clamping groove.
[0011] Furthermore, the side conductive unit includes a side sheet body matching the inner contour of the second socket unit, and two deformation parts bent at one end of the side sheet body. The deformation parts are oppositely closed to form a plugging part. The side sheet body is docked to the intermediate conductive unit.
[0012] Furthermore, the two conductive regions are spaced in the up-and-down direction, and the upper and lower end faces of the insulating bracket are open.
[0013] Furthermore, connection parts are provided on at least two bracket units. The connection parts are used for connecting with the housing and / or the wire-in base.
[0014] Furthermore, a USB charging module is further provided on at least one surface of the periphery of the housing. The USB charging module includes a first circuit board and a plugging unit integrally arranged on the first circuit board. A wire-pressing plate sleeved with the plugging unit is provided on the wire-in base. An inlet channel for the power cord to pass through is spaced between the wire-pressing plate and the wire-in base.
[0015] Furthermore, a circuit bracket is further provided in the housing. The circuit bracket includes an upper bracket extending on the top of the insulating bracket and a side bracket extending on the side of the insulating bracket. The wireless charging module is fixed on the upper bracket, and the USB charging module is fixed on the side bracket.
[0016] Further, the socket assembly includes a protection block embedded on the peripheral side surface of the insulating bracket, a socket connected to the protection block, and a grounding bracket abutted between the socket and the protection block. The grounding bracket extends into the socket. The grounding brackets in each socket assembly are connected to each other and are connected with a grounding connection piece.
[0017] Compared with the prior art, the present utility model has the following advantages and beneficial effects:
[0018] The present utility model adopts an integral insulating bracket, and conductive regions are formed on the upper and lower end surfaces of the insulating bracket, so that the conductive regions are at the same horizontal height. During assembly, only side conductive units need to be respectively snapped into the periphery of the conductive region, and an intermediate conductive unit is snapped into the middle of the conductive region. Thus, the intermediate conductive unit located on the same conductive region can form electrical connections with multiple side conductive units, and the insulating bracket can be assembled by plugging on both the front and back sides. The operation is simple and convenient. Moreover, each side conductive unit and the intermediate conductive unit are single components, and the component relationship on the same conductive region is simple and clear, and the structure is compact.
[0019] The present utility model also provides a wireless charging module at the top of the insulating bracket and a USB charging module on one peripheral side surface of the insulating bracket, improving the versatility of the Rubik's cube socket. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is the overall schematic diagram of the present utility model;
[0021] Figure 2 is the structural schematic diagram of the present utility model after removing the housing;
[0022] Figure 3 is the exploded view of the insulating bracket and the incoming line base of the present utility model;
[0023] Figure 4 is the structural schematic diagram of the insulating bracket and the conductive assembly of the present utility model;
[0024] Figure 5 is the structural schematic diagram of the insulating bracket of the present utility model;
[0025] Figure 6 is the structural schematic diagram of the conductive assembly of the present utility model;
[0026] Figure 7 is the exploded schematic diagram of the socket assembly, the conductive assembly, the insulating bracket and the incoming line base of the present utility model;
[0027] Figure 8 is the structural schematic diagram of the grounding bracket and the grounding connection piece of the present utility model;
[0028] Figure 9It is a cross-sectional view of the present utility model;
[0029] In the figure: 1, incoming line base; 1.1, incoming line part; 1.2, first notch; 2, housing; 3, insulating bracket; 3.1, first card seat unit; 3.2, second card seat unit; 3.3, bracket unit; 3.31, opening slot; 3.32, connecting part; 3.4, clamping slot; 3.5, edge stop; 4, socket assembly; 4.1, protection block; 4.2, plug socket; 4.3, grounding bracket; 4.4, grounding connection piece; 5, plugging surface; 6, conductive area; 7, side conductive unit; 7.1, side plate body; 7.2, deformation part; 7.3, plugging part; 8, middle conductive unit; 8.1, connecting pin; 8.2, middle plate body; 9, wireless charging module; 9.1, wireless charging surface; 10, USB charging module; 10.1, first circuit board; 10.2, plugging unit; 11, pressure plate; 12, incoming line channel; 13, circuit bracket; 13.1, upper bracket; 13.2, side bracket; 13.3, second notch; Specific embodiments
[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0031] It should be understood that although the terms upper, middle, lower, top end, one end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for easy understanding, rather than to define any directional or sequential limitations.
[0032] As Figures 1-9 shown, a Rubik's cube socket with a wireless charging module includes:
[0033] An incoming line base 1 connected to a power cord, a housing 2 closed on the incoming line base 1, and an insulating bracket 3 provided in the housing 2,
[0034] The insulating bracket 3 is an integral component. A socket assembly 4 and a conductive assembly are provided on the insulating bracket 3. The socket assembly 4 is in communication with the conductive assembly and constitutes at least one plugging surface 5 on the surface of the housing 2;
[0035] On the opposite sides of the insulating bracket 3, two spaced conductive regions 6 are defined. A set of conductive components is arranged in each conductive region 6. The conductive components include at least one side conductive unit 7 clamped on the peripheral side of the conductive region 6 and an intermediate conductive unit 8 clamped in the middle of the conductive region 6. Wherein, the number of side conductive units 7 corresponds to the number of plugging surfaces 5. The front sides of the side conductive units 7 in the two conductive regions 6 on the same plugging surface 5 are correspondingly arranged with the socket assembly 4. The intermediate conductive unit 8 in each conductive region 6 is connected to the inner side of the side conductive unit 7, and at least one intermediate conductive unit 8 is connected to the incoming line base 1. When the plug is correctly inserted into the socket assembly 4, within the same plugging surface 5, the plug connects the side conductive units 7 and the intermediate conductive unit 8 on the two conductive regions 6 to be powered on.
[0036] Specifically, the two conductive regions 6 are spaced in the up and down directions. The upper and lower end faces of the insulating bracket 3 are open, so as to facilitate the installation of the intermediate conductive unit 8 and the side conductive unit 7. During assembly, only the front and back sides of the insulating bracket 3 need to be installed respectively, and the structure and shape of each side conductive unit 7 are the same, without the need to distinguish the installation components, which is beneficial to improving the assembly efficiency.
[0037] Combined Figure 5 and Figure 6 As shown, specifically, the insulating bracket 3 includes a first clamping seat unit 3.1 arranged in the middle of the conductive region 6, a plurality of bracket units 3.3 arranged on the peripheral side of the first clamping seat unit 3.1, and a second clamping seat unit 3.2 defined between the two bracket units 3.3, so that the bracket units 3.3 and the second clamping seat unit 3.2 are arranged around the peripheral side of the first clamping seat unit 3.1. The first clamping seat unit 3.1 is connected to a plurality of second clamping seat units 3.2 in the same conductive region 6. The second clamping seat units 3.2 are open corresponding to the end faces of the insulating bracket 3. The side conductive unit 7 is clamped in the second clamping seat unit 3.2, and the intermediate conductive unit 8 is clamped in the first clamping seat unit 3.1.
[0038] Wherein, the socket assembly 4 is docked with one second clamping seat unit 3.2 and the bracket units 3.3 on both sides, and together defines the plugging surface 5.
[0039] Preferably, the first clamping seat unit 3.1, the second clamping seat unit 3.2 and the bracket units 3.3, as well as the side conductive unit 7 and the intermediate conductive unit 8 are flush with the end face of the insulating bracket 3, so as to form a regular insulating bracket 3 and conductive components, which is convenient for judging whether the installation of the conductive components is in place.
[0040] Preferably, the first card seat unit 3.1, the second card seat unit 3.2 and the bracket unit 3.3, as well as the side conductive unit 7 and the middle conductive unit 8 all have a square outline. As an example, the middle conductive unit 8 is a conductive copper part bent into a square outline. In the conductive area 6, the back of the side conductive unit 7 is fitted with the surface of the middle conductive unit 8, and the fitting surfaces are both flat to ensure reliable matching of the conductive components. In addition, the bottom of the side conductive unit 7 is embedded in the second card seat unit 3.2 in the vertical direction, so as to combine the limiting of the square outline to constrain the position of the side conductive unit 7 in the insulating bracket 3.
[0041] from Figure 7 It can be seen that, further, a snap-in groove 3.4 matching the contour of the intermediate conductive unit 8 is separated between the first card seat unit 3.1 and the bracket unit 3.3, and the intermediate conductive unit 8 includes a connected intermediate sheet 8.2, which is arranged corresponding to the plug-in surface 5 and clamped in the snap-in groove 3.4. The number of intermediate sheets 8.2 is four, and they are formed by bending a conductive copper part, wherein the clamping groove is arranged corresponding to the bending part between the intermediate sheets 8.2, and the intermediate sheet 8.2 is arranged corresponding to the part between the two snap-in grooves 3.4 facing the side conductive unit 7, and is reliably fitted with the side conductive unit 7.
[0042] Specifically, the bracket unit 3.3 is hollow and defines a square inner cavity. A connecting foot 8.1 extending into the second socket unit 3.2 is provided at one end of the middle conductive unit 8. The connecting foot 8.1 is inserted into the bracket unit 3.3 through the clamping groove 3.4. An opening groove 3.31 corresponding to the connecting foot 8.1 is provided on the bracket unit 3.3. The connecting foot 8.1 and the opening groove 3.31 in the two conductive areas 6 are arranged correspondingly, and an incoming line portion 1.1 docking with the insulating bracket 3 is provided in the middle of the incoming line base 1. The incoming line portion 1.1 is hollow and supported on the bottom of the insulating bracket 3. The incoming line portion 1.1 is arranged corresponding to the connecting foot 8.1 and the opening groove 3.31, and the incoming line portion 1.1 has a first groove 1.2 aligned with the opening groove 3.31 and the connecting foot 8.1. In this way, the conductive area 6 is conveniently docked with the incoming line base 1.
[0043] like Figure 6As shown, as a further implementation of the side conductive unit 7, the side conductive unit 7 includes a side sheet body 7.1 matching the inner contour of the second card holder unit 3.2, and two deformation parts 7.2 bent at one end of the side sheet body 7.1, and the deformation part 7.2 is specifically bent at the middle position close to the insulating bracket 3, so that the deformation part 7.2 is relatively closed and forms a plug-in part 7.3, and the side sheet body 7.1 is connected to the middle conductive unit 8, wherein the side sheet body 7.1 is surrounded on three sides, and the side sheet bodies 7.1 corresponding to the two sides of the middle conductive unit 8 are against the two side walls of the second card holder unit 3.2, and the plug-in part 7.3 extends out of the open side of the second card holder unit 3.2.
[0044] Preferably, the bending portion of the deformation portion 7.2 is arranged in an arc shape, so that the deformation portion 7.2 has a tendency to be relatively close and closed, so as to ensure the reliability of docking with the plug.
[0045] Furthermore, a connected hole portion is provided between the relatively fitted side piece 7.1 and the middle piece 8.2, and a conductive pin can be set in the hole portion. Of course, in other embodiments, the hole portion can also be used as a welding point position, and its main function is to ensure the stability of the fitting connection between the two.
[0046] Reference Figure 7 As a further embodiment of the socket assembly 4, the socket assembly 4 includes a protection block 4.1 embedded in the peripheral side surface of the insulating bracket 3, a socket 4.2 docked on the protection block 4.1, and a grounding bracket 4.3 abutting between the socket 4.2 and the protection block 4.1. The insulating bracket 3 is provided with ribs 3.5 on both sides corresponding to the plug-in surface 5. The two ribs 3.5 are correspondingly limited on both sides of the protection block 4.1, and the protection block 4.1 and the socket 4.2 are provided with a through hole for the end of the plug to pass through, and the through hole is correspondingly connected to the plug-in portion 7.3, and the protection block 4.1 is fixedly connected to the socket 4.2. In this way, the socket assembly 4 is docked with the insulating bracket 3 on the peripheral side surface, and the socket assembly 4 is correspondingly arranged according to the number of the plug-in surfaces 5. The socket assembly 4 is arranged in a modular form, which further improves the assembly convenience of the magic cube socket.
[0047] like Figure 8 As shown, specifically, the grounding bracket 4.3 extends in the socket 4.2, the grounding brackets 4.3 in each socket assembly are connected to each other around the insulating bracket 3, and one of the socket assemblies 4 is connected to a grounding connecting piece 4.4.
[0048] like Figures 1-3 and Figure 9 As shown, in this embodiment, a wireless charging module 9 is provided between the insulating bracket 3 and the top of the shell 2, and a wireless charging surface 9.1 is defined on the top surface of the shell 2. The wireless charging module 9 includes a second circuit board.
[0049] In some other embodiments, a USB charging module is further provided on at least one side of the circumferential side of the housing 2. The USB charging module includes a first circuit board 10.1 and a plug-in unit 10.2 integrally arranged on the first circuit board 10.1. A wire pressing plate 11 sleeved with the plug-in unit 10.2 is provided on the incoming line base 1, and an incoming line channel 12 for the power line to pass through is spaced between the wire pressing plate 11 and the incoming line base 1.
[0050] Specifically, a circuit support 13 is further provided in the housing 2. The circuit support 13 includes an upper support 13.1 extending on the top of the insulating support 3 and a side support 13.2 extending on the side of the insulating support 3. The wireless charging module 9 is fixed on the upper support 13.1, and the USB charging module is fixed on the side support 13.2. Among them, the bottom of the upper support 13.1 has an open frame facing the top of the insulating support 3, and a second notch 13.3 is provided on the open square frame. The second notch 13.3 is arranged in alignment with the first notch 1.2, the opening slot 3.31 and the connecting leg 8.1 to facilitate the line docking of the wireless charging module 9.
[0051] Preferably, the incoming line channel 12 and the USB charging module are located on the same surface to arrange the lines on the same surface.
[0052] As a further implementation manner of the insulating support 3, the same conductive region 6 is located within the same horizontal height and is fixed in the conductive region 6 in an embedded manner, so that the insulating support 3 serves as the maximum contour volume of the conductive component, and an installation space is spaced between the insulating support 3 and the housing 2 for the wireless charging module 9 and the USB charging module to be arranged on the top and side of the insulating support 3, thereby making full use of the internal space of the magic cube socket.
[0053] Specifically, connection parts 3.32 are provided on at least two support units 3.3, and the connection parts 3.32 are used for connecting with the housing 2 and / or the incoming line base 1.
[0054] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.
Claims
1. A Rubik's Cube socket with a wireless charging module, characterized in that, Comprising: An incoming line base (1) connected to a power cord, a housing (2) closed on the incoming line base (1), and an insulating bracket (3) disposed within the housing (2). A socket assembly (4) and a conductive assembly are provided on the insulating bracket (3). The socket assembly (4) communicates with the conductive assembly and forms at least one plugging surface (5) on the surface of the housing (2); Two spaced conductive regions (6) are defined on opposite sides of the insulating bracket (3). The conductive assembly includes at least one side conductive unit (7) clamped around the periphery of the conductive region (6) and an intermediate conductive unit (8) clamped in the middle of the conductive region (6). The front sides of the side conductive units (7) in the two conductive regions (6) on the same plugging surface (5) are correspondingly arranged with the socket assembly (4). The intermediate conductive unit (8) in each conductive region (6) is connected to the inner side of the side conductive unit (7); and at least one intermediate conductive unit (8) is connected to the incoming line base (1). A wireless charging module (9) is provided between the top of the insulating bracket (3) and the housing (2), and a wireless charging surface (9.1) is defined on the top surface of the housing (2).
2. The magic cube socket with a wireless charging module according to claim 1, characterized in that: The insulating bracket (3) includes a first clamping seat unit (3.1) arranged in the middle of the conductive region (6), a plurality of bracket units (3.3) provided on the periphery of the first clamping seat unit (3.1), and a second clamping seat unit (3.2) defined between two bracket units (3.3). The socket assembly (4) is butted against one second clamping seat unit (3.2) and the bracket units (3.3) on both sides and together defines the plugging surface (5). The first clamping seat unit (3.1) communicates with a plurality of second clamping seat units (3.2) in the same conductive region (6). The side conductive unit (7) is clamped in the second clamping seat unit (3.2), and the intermediate conductive unit (8) is clamped in the first clamping seat unit (3.1).
3. The Rubik's Cube socket with a wireless charging module according to claim 2, characterized in that: One end of the intermediate conductive unit (8) has a connecting leg (8.1) extending within the bracket unit (3.3). An opening slot (3.31) corresponding to the connecting leg (8.1) is provided on the bracket unit (3.3). The connecting legs (8.1) and the opening slots (3.31) in the two conductive regions (6) are correspondingly arranged. A middle part of the incoming line base (1) is provided with an incoming line part (1.1) for docking with the insulating bracket (3). The incoming line part (1.1) is supported on the bottom of the insulating bracket (3) and is arranged corresponding to the connecting leg (8.1) and the opening slot (3.31).
4. The Rubik's Cube socket with a wireless charging module according to claim 2, characterized in that: A clamping slot (3.4) matching the contour of the intermediate conductive unit (8) is spaced between the first clamping seat unit (3.1) and the bracket unit (3.3). The intermediate conductive unit (8) includes a connected intermediate sheet body (8.2). The intermediate sheet body (8.2) is arranged corresponding to the plugging surface (5) and is clamped in the clamping slot (3.4).
5. The magic cube socket with a wireless charging module according to claim 2, characterized in that: The side conductive unit (7) includes a side plate body (7.1) that matches the inner contour of the second card seat unit (3.2), and two deformation parts (7.2) bent at one end of the side plate body (7.1). The opposite sides of the deformation parts (7.2) are closed to form a plug-in part (7.3), and the side plate body (7.1) is butted against the middle conductive unit (8).
6. The magic cube socket with a wireless charging module according to claim 1, characterized in that: The two conductive regions (6) are arranged at intervals in the vertical direction, and the upper and lower end faces of the insulating bracket (3) are open.
7. The magic cube socket with a wireless charging module according to claim 2, characterized in that: At least two support units (3.3) are provided with connection parts (3.32) for connecting with the housing (2) and / or the incoming line base (1).
8. The Rubik's Cube socket with a wireless charging module according to claim 1, characterized in that: At least one side of the circumferential side of the housing (2) is further provided with a USB charging module, which includes a first circuit board (10.1) and a plug-in unit (10.2) integrally arranged on the first circuit board (10.1). The incoming line base (1) is provided with a wire pressing plate (11) sleeved with the plug-in unit (10.2), and an incoming line channel (12) for the power line to pass through is spaced between the wire pressing plate (11) and the incoming line base (1).
9. The magic cube socket with a wireless charging module according to claim 8, characterized in that: A circuit bracket (13) is further arranged in the housing (2). The circuit bracket (13) includes an upper bracket (13.1) extending on the top of the insulating bracket (3) and a side bracket (13.2) extending on the side of the insulating bracket (3). The wireless charging module (9) is fixed on the upper bracket (13.1), and the USB charging module is fixed on the side bracket (13.2).
10. The Rubik's Cube socket with a wireless charging module according to claim 1, characterized in that: The socket assembly (4) includes a protection block (4.1) embedded on the circumferential side surface of the insulating bracket (3), a socket (4.2) butted against the protection block (4.1), and a grounding bracket (4.3) abutted between the socket (4.2) and the protection block (4.1). The grounding bracket (4.3) extends into the socket (4.2).
Citation Information
Patent Citations
Magic cube socket adopting L, N and E pole conductor safety stacked structure
CN219144545U