Automotive armrest box docking station

Abstract

The application relates to the field of automobile accessories, and relates to an automobile handrail box expansion dock. The expansion dock is characterized in that a first circuit board and a second circuit board are arranged in a shell, a connector is arranged on the first circuit board, the connector is connected to the side surface of the shell, a charging interface is arranged on the second circuit board, the charging interface is connected to the top surface of the shell, and the two circuit boards are electrically connected. According to the application, the first circuit board and the second circuit board are arranged to be inclined, so that, after the expansion dock is fixed by being attached to the inner wall of an inclined handrail box, the charging interface can be inclined to be away from the side where the inner wall of the handrail box is located, the direction of the charging interface above the expansion dock can be vertically upward, the space around the charging interface above the expansion dock can be increased, the fingers of the owner can be prevented from interfering with the inner wall of the handrail box during charging operation, the owner is further facilitated to perform the charging operation, and a better experience is provided for the owner.

Description

Technical Field

[0001] This application relates to the field of automotive parts, specifically to an automotive armrest box expansion dock. Background Technology

[0002] With the widespread use of in-vehicle electronic devices (such as smartphones, dashcams, and car chargers), users' demands for in-vehicle power interfaces, data connectivity, and convenient storage have increased significantly. Traditional armrest boxes have limited functionality, primarily focusing on basic storage, with insufficient number and fixed positions of interfaces, failing to meet the needs of charging or expanding multiple devices simultaneously. Furthermore, low utilization of in-vehicle space and cluttered cables negatively impact the driving and riding experience. To address these issues, docking station technology integrates multiple types of charging interfaces, modular storage partitions, and compatibility design, combined with ergonomically optimized layouts, achieving functional integration and efficient space utilization. This has become a solution for modern automotive intelligence and the upgrading of user needs.

[0003] Currently, many car models have a power interface on the inner wall of the armrest box. A connector is located on one side of the expansion dock, which inserts into the power interface on the armrest box inner wall via this connector, achieving a detachable connection. To avoid occupying storage space in the armrest box, the expansion dock is generally small and fits snugly against the inner wall. This results in the charging interface on the expansion dock being quite close to the inner wall, leaving little space around it. Existing expansion docks typically include a circuit board, which houses both the connector and the charging interface. Considering cost, standard components are used for the connectors and charging interfaces, which are usually arranged vertically or parallel to each other on the circuit board. This leads to connectors and charging interfaces on the same expansion dock being perpendicular or opposite in direction.

[0004] However, the inner wall of the armrest box sometimes needs to be made into a sloping surface to achieve better space utilization. In this case, the docking station needs to be angled and fitted against the inner wall of the armrest box. When the charging port is located on the upper surface of the docking station, the charging port can only be arranged parallel to the circuit board, with the direction of the charging port parallel to the inner wall of the armrest box. This results in the charging port being tilted, which is not conducive to the insertion of the charging plug. Utility Model Content

[0005] To solve, or at least partially solve, the aforementioned technical problems, this application provides an automotive armrest box expansion dock, comprising:

[0006] The housing has a first sidewall for fitting against the inner wall of the armrest box, and a second sidewall adjacent to the first sidewall;

[0007] A first circuit board is disposed inside the housing. A connector is disposed on the first circuit board. The connector extends through the first side wall to the outside of the housing and is used to connect to the power interface of the inner wall of the armrest box.

[0008] A second circuit board is disposed inside the housing and electrically connected to the first circuit board. The second circuit board is provided with a first charging interface, which extends through the second sidewall to the outside of the housing.

[0009] The second circuit board is tilted relative to the first circuit board so that the first charging interface is tilted toward the side away from the first sidewall.

[0010] Optionally, the connector is perpendicular to the first sidewall, and the angle formed by the orientation of the first charging interface and the orientation of the connector is an obtuse angle.

[0011] Optionally, the angle formed by the orientation of the first charging interface and the orientation of the connector is 100-120 degrees.

[0012] Optionally, the first circuit board is arranged parallel to the first sidewall, and the connector is arranged perpendicularly to the first circuit board;

[0013] The angle formed between the second circuit board and the first circuit board is an acute angle, and the orientation of the first charging interface is parallel to that of the second circuit board.

[0014] Optionally, the angle between the second circuit board and the first circuit board is 10-30 degrees.

[0015] Optionally, the first charging port is oriented perpendicular to the second sidewall, and the angle between the second sidewall and the first sidewall is 60-80 degrees.

[0016] Optionally, the housing further includes a third sidewall adjacent to the second sidewall and located on the opposite side of the first sidewall, the third sidewall being arranged parallel to the second circuit board.

[0017] Optionally, a second charging interface is provided on the second circuit board, and the second charging interface extends through the third sidewall to the outside of the housing.

[0018] Optionally, the housing further includes a fourth sidewall adjacent to the first sidewall and the third sidewall, and located on the opposite side of the second sidewall, the fourth sidewall being used to abut against the bottom of the armrest box.

[0019] Optionally, the first circuit board and the second circuit board are detachably connected via an FPC connector.

[0020] The car armrest box expansion dock provided in this application has a first circuit board and a second circuit board installed inside the housing. The first circuit board has a connector that leads to the side of the housing, and the second circuit board has a charging interface that leads to the top of the housing. The two circuit boards are electrically connected. Based on the assumption that the connector and charging interface are installed vertically or parallel on the circuit boards, this application tilts the first and second circuit boards so that after the expansion dock is installed and fixed against the tilted inner wall of the armrest box, the charging interface can tilt away from the inner wall of the armrest box. This allows the charging interface above the expansion dock to be vertically upward, facilitating charging operations for the car owner. Simultaneously, it increases the space around the charging interface above the expansion dock, preventing interference between the car owner's fingers and the inner wall of the armrest box during charging, further facilitating charging operations and providing a better user experience. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this application, the relevant drawings will be briefly described below. It is understood that the drawings described below are only for illustrating some embodiments of this application, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0022] Figure 1 This is a cross-sectional schematic diagram of an existing expansion dock.

[0023] Figure 2 A cross-sectional schematic diagram of a docking station in use in the prior art;

[0024] Figure 3 This is a cross-sectional schematic diagram of the expansion dock of this application;

[0025] Figure 4 This is a cross-sectional schematic diagram of the expansion dock in use according to this application;

[0026] Figure 5 This is a schematic diagram of the circuit board structure inside the expansion dock of this application;

[0027] Figure 6 This is a schematic diagram of the appearance of the expansion dock of this application;

[0028] Figure 7 This is a schematic diagram of the expansion dock installed inside the armrest box.

[0029] Explanation of reference numerals in the attached figures:

[0030] 11. First sidewall; 12. Second sidewall; 13. Third sidewall; 14. Fourth sidewall; 15. Buckle; 111. First mounting base; 131. Second mounting base; 132. Positioning post;

[0031] 21. First circuit board; 22. Second circuit board; 221. Electrical component;

[0032] 3. Connector; 4. First charging interface; 5. FPC connector; 6. Inner wall of armrest box; 7. Power interface; 8. Charging plug. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0036] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0037] Please see Figure 1The diagram shows a conventional docking station structure. One side of the docking station housing is a first sidewall 11, on which a connector 3 is mounted. The upper surface of the docking station housing is a second sidewall 12, on which a charging interface, denoted as a first charging interface 4, is mounted. The conventional docking station contains only one circuit board, denoted as a first circuit board 21. Therefore, both the connector 3 and the first charging interface 4 are mounted on this first circuit board 21.

[0038] Considering cost, connector 3 and first charging interface 4 are standard parts. Connector 3 and first charging interface 4 are usually arranged vertically or parallel on the first circuit board 21, which results in the connector 3 and first charging interface 4 on the same expansion dock being perpendicular to each other or opposite to each other. In Figure 1, the connector 3 and first charging interface 4 are perpendicular to each other.

[0039] like Figure 2 As shown, the inner wall 6 of the car armrest box is usually a sloping surface, not vertical. This causes the expansion dock to be tilted and fitted onto the inner wall 6 of the armrest box. When the charging port is located on the upper surface of the expansion dock, the charging port is generally parallel to the circuit board. In the figure, the direction of the first charging port 4 is parallel to the inner wall 6 of the armrest box. In order not to occupy the storage space of the armrest box, the expansion dock is generally designed to be small in size, especially in thickness, so that the expansion dock fits as close as possible to the inner wall 6 of the armrest box. This leads to the following two problems:

[0040] First, the first charging port 4 is tilted. Since the car armrest box opens from the top and the driver's arm operates from top to bottom, the tilted first charging port 4 is not conducive to inserting the charging plug 8, which causes some inconvenience to the driver when charging.

[0041] Secondly, the port of the first charging port 4 is already quite close to the inner wall 6 of the armrest box. The direction of the charging port of the first charging port 4 is parallel to the inner wall 6 of the armrest box, which causes the distance between the charging port and the inner wall 6 of the armrest box to always remain close, thereby reducing the space around the first charging port 4. When the car owner is charging, the inner wall 6 of the armrest box is likely to interfere with the car owner's fingers, which is not conducive to the car owner's fingers to insert and unplug the charging plug 8, causing trouble for the car owner.

[0042] Based on this, in order to solve the above problems, this embodiment has improved the internal structure of the expansion dock.

[0043] like Figure 3As shown, this embodiment provides an automotive armrest box expansion dock. The housing of the expansion dock includes a first side wall 11, a second side wall 12, a third side wall 13, and a fourth side wall 14 arranged around the perimeter of the expansion dock housing. The first side wall 11 is used to fit against the inner wall 6 of the armrest box, and the second side wall 12 is adjacent to the first side wall 11 and serves as the upper surface of the housing.

[0044] The housing contains a first circuit board 21 and a second circuit board 22. The first circuit board 21 has a connector 3 that extends through the first side wall 11 to the outside of the housing and is used to connect to the power interface 7 of the inner wall 6 of the armrest box. The second circuit board 22 is electrically connected to the first circuit board 21 and has several first charging interfaces 4 that extend through the second side wall 12 to the surface of the housing and are used to insert and connect the charging plug 8.

[0045] In this embodiment, the second circuit board 22 is inclined relative to the first circuit board 21, that is, the second circuit board 22 and the first circuit board 21 are arranged with an acute angle between them. In order to insert into the power interface 7 of the inner wall 6 of the armrest box, the connector 3 is arranged perpendicular to the first circuit board 21. In order to face the upper surface of the shell, the first charging interface 4 is arranged parallel to the second circuit board 22.

[0046] like Figure 4 As shown, after the second circuit board 22 and the first circuit board 21 are fixed inside the housing, the connector 3 is inserted into the power interface 7, and the first side wall 11 is attached to the inner wall 6 of the armrest box. By tilting the second circuit board 22 relative to the first circuit board 21, the first charging interface 4 is tilted away from the side where the first side wall 11 is located. This allows the opening of the first charging interface 4 to be set vertically upward, avoiding the situation where the first charging interface 4 is also tilted with the inner wall 6 of the armrest box due to the use of the same circuit board in the traditional way. The opening of the first charging interface 4 is set vertically upward, which makes it easy for the car owner to see the first charging interface 4 and to insert or pull out the charging plug 8 vertically, improving the convenience of charging operation and avoiding damage to the plug caused by improper tilting insertion to a certain extent.

[0047] And please see Figure 4 The second circuit board 22 is inclined relative to the first circuit board 21. The inclined design of the charging interface increases the distance between the charging interface and the inner wall 6 of the armrest box, thereby reducing the interference between the user's fingers and the inner wall during operation. Specifically, even if the first charging interface 4 is not vertically arranged, because the first charging interface 4 is inclined in the direction away from the side wall 11, the space around the first charging interface 4 above the dock can be increased, avoiding interference between the driver's fingers and the inner wall 6 of the armrest box during charging operations, further facilitating the driver's charging operation and providing a better experience.

[0048] In this embodiment, as Figure 3 As shown, the first circuit board 21 is fixed to the first side wall 11 by the first mounting base 111. The first circuit board 21 is parallel to the first side wall 11, so the connector 3 is perpendicular to the first side wall 11. Similarly, the power interface 7 is vertically arranged on the inner wall 6 of the armrest box to facilitate the insertion of the expansion dock for connection. The second circuit board 22 is fixed to the third side wall 13 by the second mounting base 131. The second circuit board 22 is parallel to the third side wall 13. Since the second circuit board 22 is inclined relative to the first circuit board 21, the angle formed by the orientation of the first charging interface 4 and the orientation of the connector 3 is an obtuse angle, so that the first charging interface 4 is inclined in the direction away from the side wall 11, thus achieving the technical effect described above.

[0049] Based on this, the first sidewall 11 and the third sidewall 13 are inclined to a certain extent, the second sidewall 12 is relatively longer than the fourth sidewall 14, and the expansion dock shell is thicker at the top and narrower at the bottom, which can be adapted to the interior of the armrest box. When the third sidewall 13 is in a vertical state, it is also convenient for the storage of the armrest box.

[0050] like Figure 3 As shown, a buckle 15 is provided inside the third side wall 13. The buckle 15 cooperates with the slot inside the first side wall 11 or the fourth side wall 14 to realize the disassembly of the docking station housing.

[0051] It is worth mentioning that, in this embodiment, the tilt of the second circuit board 22 and the first circuit board 21 depends on the tilt angle of the inner wall 6 of the armrest box. The tilt angle of the second circuit board 22 and the first circuit board 21 is such that the opening of the first charging port 4 is vertically upward.

[0052] In this embodiment, the first circuit board 21 is arranged parallel to the first sidewall 11, and the connector 3 is arranged perpendicularly to the first circuit board 21; the angle formed between the second circuit board 22 and the first circuit board 21 is an acute angle, and the orientation of the first charging interface 4 is parallel to that of the second circuit board 22. The angle between the second circuit board 22 and the first circuit board 21 is equivalent to the angle between the orientation of the first charging interface 4 and the inner wall 6 of the armrest box.

[0053] In this embodiment, the angle between the second circuit board 22 and the first circuit board 21 can be 10-30 degrees.

[0054] For example, when the expansion dock is thicker, the internal space of the expansion dock is more sufficient. At this time, the angle formed by the second circuit board 22 and the first circuit board 21 can be 30 degrees or even greater than 30 degrees. At this time, the tilt angle between the first charging port 4 and the inner wall 6 of the armrest box is greater, the distance between the first charging port 4 and the inner wall 6 of the armrest box increases, and the operating space increases.

[0055] When the thickness of the expansion dock is small, the internal space of the expansion dock is insufficient. In this case, in order to reduce the volume of the expansion dock, the angle formed by the second circuit board 22 and the first circuit board 21 can be 10 degrees or even less than 10 degrees. At this time, the tilt angle between the first charging interface 4 and the inner wall 6 of the armrest box is small.

[0056] In one embodiment, in order to ensure adequate operating space while also considering a reduction in the size of the docking station, the angle between the second circuit board 22 and the first circuit board 21 can be set to 20 degrees.

[0057] Of course, the angle formed between the second circuit board 22 and the first circuit board 21 is also determined according to the tilt angle of the inner wall 6 of the armrest box. In order to ensure that the second circuit board 22 is set vertically and the opening of the first charging interface 4 is vertically upward, the angle formed between the second circuit board 22 and the first circuit board 21 corresponds to the tilt angle of the inner wall 6 of the armrest box.

[0058] With the opening of the first charging interface 4 vertically upward, the angle between the second circuit board 22 and the first circuit board 21 is 10-30 degrees. Correspondingly, the angle between the orientation of the first charging interface 4 and the orientation of the connector 3 is 100-120 degrees. Since the orientation of the first charging interface 4 is perpendicular to the second side wall 12, the angle between the second side wall 12 and the first side wall 11 is 60-80 degrees.

[0059] In some embodiments, the first circuit board 21 and the first sidewall 11 may not be parallel, forming a certain angle. In this case, the connector 3 is tilted relative to the first sidewall 11. Of course, the connector 3 should be tilted towards the fourth sidewall 14. Correspondingly, the power interface 7 is also tilted relative to the inner wall 6 of the armrest box to adapt to the connector 3. With this configuration, the connector 3, while connecting to the power interface 7, also forms a hook-like structure, hanging the docking station on the inner wall 6 of the armrest box to prevent displacement of the docking station.

[0060] like Figure 5 As shown, since the second circuit board 22 and the first circuit board 21 are inclined in this embodiment, in order to facilitate the installation of the two circuit boards and prevent them from interfering with each other, the first circuit board 21 is significantly smaller than the second circuit board 22, which can free up space inside the expansion dock housing so that the electrical components 221 inside the expansion dock can be installed on the second circuit board 22.

[0061] The electrical component 221 in this embodiment includes various components that enable charging within the docking station. The electrical component 221 includes components such as a main control chip, diodes, resistors, and capacitors. Since the electrical component 221 is conventional knowledge in this field, it will not be described in detail here.

[0062] like Figure 5As shown, the second circuit board 22 is also provided with positioning holes, which match the positioning posts 132 on the inner side of the third side wall 13 to realize the installation and positioning of the second circuit board 22.

[0063] like Figure 2 and Figure 5 As shown, in this embodiment, the first circuit board 21 and the second circuit board 22 are electrically connected, and they are connected by a detachable FPC connector 5.

[0064] The FPC connector 5 has detachable plugs at both ends. One end of the plug is detachably connected to the interface of the first circuit board 21, and the other end of the plug is detachably connected to the interface of the second circuit board 22.

[0065] The FPC connector 5 in this embodiment is an electronic connection component specifically designed for flexible printed circuit boards (FPCs), mainly used to achieve a reliable connection between flexible circuits and the motherboard or other electronic components. FPC connectors are also common knowledge in the art, and will not be described in detail in this embodiment.

[0066] like Figure 6 As shown, in one embodiment, a plurality of first charging ports 4 are provided on the second sidewall 12 to meet the multiple charging needs of the car owner, and the plurality of first charging ports 4 are arranged in a line.

[0067] In one embodiment, a second charging interface (not shown) is provided on the second circuit board 22, which extends through the third sidewall 13 to the outside of the housing. The second charging interface faces the inside of the armrest box to facilitate charging of electronic devices placed inside the armrest box.

[0068] Please see Figure 4 In this embodiment, the shape of the fourth sidewall 14 can be adapted to the bottom of the armrest box. Based on the height design of the docking station, the fourth sidewall 14 can extend to the bottom of the armrest box and abut against it, providing support for the docking station. When the car owner inserts the charging plug 8 into the docking station, it will inevitably exert downward pressure on the docking station. The fourth sidewall 14 abutting against the bottom of the armrest box provides upward support for the docking station, preventing displacement and detachment, and improving the stability of the docking station installation.

[0069] Of course, in some embodiments, the docking station can be designed to be smaller, or depending on the size of the armrest box of different models, the docking station can be fitted to the middle of the inner wall 6 of the armrest box, and the fourth side wall 14 can be suspended. At this time, the housing of the docking station can be abutted against the side walls of the armrest box on the left and right sides through its side walls, thereby fixing the docking station and reducing the pressure on the connector 3.

[0070] like Figure 7As shown, the lateral length of the expansion dock can be set to match the width of the armrest box. Since the left and right side walls of the armrest box of a typical car model are also inclined, and its width decreases from top to bottom, the distance between the side walls of the expansion dock can also be set to decrease from top to bottom. The side walls of the expansion dock abut against the left and right side walls of the armrest box, thereby securing the expansion dock in the middle of the inner wall 6 of the armrest box.

[0071] Preferredly, since the first sidewall 11 and the sidewalls on both sides of the expansion dock are in contact with the inside of the armrest box, the first sidewall 11 and the sidewalls on both sides of the expansion dock can be provided with an anti-slip layer to improve friction and further improve the stability of the expansion dock installation.

[0072] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A car armrest box expansion dock, characterized in that, include: The housing has a first sidewall (11) for fitting against the inner wall (6) of the armrest box, and a second sidewall (12) adjacent to the first sidewall (11); A first circuit board (21) is disposed inside the housing. A connector (3) is disposed on the first circuit board (21). The connector (3) passes through the first side wall (11) to the outside of the housing and is used to connect the power interface (7) of the inner wall (6) of the armrest box. The second circuit board (22) is disposed inside the housing and is electrically connected to the first circuit board (21). The second circuit board (22) is provided with a first charging interface (4), which extends through the second sidewall (12) to the outside of the housing. The second circuit board (22) is tilted relative to the first circuit board (21) so that the first charging interface (4) is tilted toward the side away from the first sidewall (11).

2. The automotive armrest box expansion dock according to claim 1, characterized in that, The connector (3) is perpendicular to the first sidewall (11), and the angle formed by the orientation of the first charging interface (4) and the orientation of the connector (3) is an obtuse angle.

3. The automotive armrest box expansion dock according to claim 2, characterized in that, The angle between the orientation of the first charging interface (4) and the orientation of the connector (3) is 100-120 degrees.

4. The automotive armrest box expansion dock according to claim 1, characterized in that, The first circuit board (21) is arranged parallel to the first sidewall (11), and the connector (3) is arranged perpendicularly to the first circuit board (21); The angle formed between the second circuit board (22) and the first circuit board (21) is an acute angle, and the orientation of the first charging interface (4) is parallel to that of the second circuit board (22).

5. The automotive armrest box expansion dock according to claim 4, characterized in that, The angle between the second circuit board (22) and the first circuit board (21) is 10-30 degrees.

6. The automotive armrest box expansion dock according to claim 4, characterized in that, The first charging port (4) is oriented perpendicular to the second sidewall (12), and the angle between the second sidewall (12) and the first sidewall (11) is 60-80 degrees.

7. The automotive armrest box expansion dock according to claim 4, characterized in that, The housing also includes a third sidewall (13), which is adjacent to the second sidewall (12) and located on the opposite side of the first sidewall (11). The third sidewall (13) is arranged parallel to the second circuit board (22).

8. The automotive armrest box expansion dock according to claim 7, characterized in that, The second circuit board (22) is provided with a second charging interface, which extends through the third sidewall (13) to the outside of the housing.

9. The automotive armrest box expansion dock according to claim 7, characterized in that, The housing also includes a fourth sidewall (14) which is adjacent to the first sidewall (11) and the third sidewall (13) and is located on the opposite side of the second sidewall (12). The fourth sidewall (14) is used to abut against the bottom of the armrest box.

10. The automotive armrest box expansion dock according to any one of claims 1 to 9, characterized in that, The first circuit board (21) and the second circuit board (22) are detachably connected by an FPC connector (5).

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