Housing assembly and charging device

Abstract

The application provides a shell assembly and a charging device. The shell assembly is applied to the charging device. The charging device comprises a first circuit board and a second circuit board. The shell assembly comprises a metal shell, a plastic cover and a flexible metal piece. The metal shell is configured to accommodate the first circuit board. The metal shell is provided with an assembly opening. The assembly opening is configured to allow the first circuit board to be assembled into the metal shell. The plastic cover is arranged on the assembly opening. The plastic cover is configured to be fixedly connected to the second circuit board. The flexible metal piece is configured to be attached to the second circuit board. When the plastic cover is arranged on the assembly opening, the two opposite ends of the flexible metal piece are both abutted against the metal shell. The flexible metal piece is located at the assembly opening and covers at least a part of the area of the assembly opening. The shell assembly and the charging device provided by the application can improve the overall electromagnetic shielding effect of the shell assembly.

Description

Technical Field

[0001] This application relates to the field of charge and discharge management equipment technology, and in particular to a housing assembly and a charging device. Background Technology

[0002] Charging devices typically use metal as the casing, which facilitates heat dissipation and provides electromagnetic shielding for the magnetic components on the circuit board. In related technologies, for ease of production and installation, the casing has an opening at at least one end, and a plastic component is installed at the opening. This weakens the electromagnetic shielding effect at the opening, resulting in a reduction in the overall electromagnetic shielding effectiveness of the casing. Utility Model Content

[0003] In view of this, this application provides a housing assembly and a charging device that can improve the overall electromagnetic shielding effect of the housing assembly.

[0004] One embodiment of this application provides a housing assembly. The housing assembly is used in a charging device. The charging device includes a first circuit board and a second circuit board. The housing assembly includes a metal casing, a plastic cover, and a flexible metal member. The metal casing is configured to accommodate the first circuit board. The metal casing has a mounting opening. The mounting opening is configured for mounting the first circuit board into the interior of the metal casing. The plastic cover is disposed on the mounting opening. The plastic cover is configured to securely connect to the second circuit board. The flexible metal member is configured to be attached to the second circuit board. When the plastic cover is disposed on the mounting opening, both opposite ends of the flexible metal member abut against the metal casing. The flexible metal member is located at the mounting opening and covers at least a portion of the mounting opening.

[0005] The flexible metal component is fixed to the plastic cover via a second circuit board, allowing it to move along with the cover. When the plastic cover is placed over the assembly opening, the flexible metal component moves synchronously to the opening and contacts the metal housing. Simultaneously, the flexible metal component's attachment to the second circuit board reduces the need for additional supporting components, thus reducing the number of parts and simplifying installation. The opposing ends of the flexible metal component can establish an electrical connection with the metal housing, allowing the shielding electric field current to pass through the assembly opening and provide electromagnetic shielding at the opening. This allows the flexible metal component to work with the metal housing to form a relatively complete metal shield, improving the overall electromagnetic shielding effect of the housing assembly. Furthermore, the movement of the flexible metal component with the plastic cover does not affect the original assembly or disassembly of the plastic cover and metal housing, helping to maintain high installation efficiency for the housing assembly.

[0006] In some embodiments of this application, a portion of the flexible metal component is clamped between the plastic cover and the metal housing.

[0007] Under the clamping force of the plastic cap and the metal casing, the flexible metal part can stably abut against the metal casing, thereby maintaining the electromagnetic shielding effect of the flexible metal part.

[0008] In some embodiments of this application, the side of the plastic cover facing the metal housing is configured to fix the second circuit board. A conductive layer is provided on the side of the second circuit board facing away from the plastic cover. A flexible metal element is configured to be attached to and electrically connected to the conductive layer.

[0009] The flexible metal component is electrically connected to the conductive layer of the second circuit board, allowing the flexible metal component to work with the second circuit board to form an electromagnetic shielding cover over the assembly port. This increases the area covered by the electromagnetic shielding cover over the assembly port, improving the overall electromagnetic shielding effect of the housing assembly. Furthermore, the flexible metal component can separate the first and second circuit boards, helping to prevent electromagnetic interference between them.

[0010] In some embodiments of this application, the conductive layer has a clearance region. Device pins of the second circuit board extend from the clearance region. The flexible metal component has a first clearance opening. When the flexible metal component is attached to the conductive layer, the first clearance opening is configured to allow device pins to pass through.

[0011] The device pins extend from the clearance area to avoid electrical connection with the conductive layer. The flexible metal part, by setting the first clearance opening, covers the assembly opening while avoiding electrical connection with the device pins. This provides electromagnetic shielding while facilitating the connection of electrical components to the second circuit board.

[0012] In some embodiments of this application, the assembly opening has two first edges opposite each other along a first direction and two second edges opposite each other along a second direction. The distance between the two first edges is less than the distance between the two second edges. The opposite ends of the flexible metal part respectively contact the opposite side walls where the two first edges of the metal housing are located. The first direction and the second direction intersect.

[0013] The flexible metal component can span the assembly opening, thereby improving its electromagnetic shielding effect. Furthermore, by spanning the two opposite sides of the two closely spaced first edges, the flexible metal component can extend in the second direction and abut against the metal casing. This allows for a larger contact area between the flexible metal component and the metal casing in the second direction compared to the first direction, thus enhancing the electromagnetic shielding effect.

[0014] In some embodiments of this application, the plastic cap includes a cover plate and a side plate. The cover plate covers the mounting opening. The side plate is disposed around the edge of the cover plate. The side plate extends into the mounting opening and connects to the metal housing. The end of a flexible metal component is attached to the side plate and located between the side plate and the metal housing.

[0015] The side plate extends into the metal housing to facilitate the alignment of the plastic cap and the metal housing, and also helps to stably fix the plastic cap to the metal housing. The end of the flexible metal part is attached to and fixed to the side plate, and can move with the side plate. With the help of the side plate, the end of the flexible metal part can easily enter the interior of the metal housing and abut against the wall of the metal housing.

[0016] In some embodiments of this application, the side plate has a recessed area. The end of the flexible metal part is attached to the area of ​​the recessed region. Furthermore, the thickness of the end of the flexible metal part is greater than the depth of the recessed region.

[0017] By creating a recessed area, the position of the end of the flexible metal component is easily positioned, facilitating its fixation to the plastic cover. Furthermore, the end of the flexible metal component can protrude from the recessed area, allowing the side plate and metal casing to clamp the end of the flexible metal component, thus improving the stability of the contact between the flexible metal component and the metal casing.

[0018] In some embodiments of this application, the side plate is provided with a snap fastener. The flexible metal part is provided with a second recess. The second recess allows the snap fastener to extend out and engage with the metal housing.

[0019] By setting a second clearance opening, the flexible metal part can bypass the location of the buckle when it is attached to the side plate. This avoids affecting the engagement between the buckle and the metal shell, and allows the part of the flexible metal part near the buckle to be subjected to greater clamping force under the engagement of the buckle and the metal shell. This facilitates maintaining the contact and engagement between the flexible metal part and the metal shell, thus maintaining the electromagnetic shielding effect.

[0020] One embodiment of this application provides a charging device. The charging device includes a first circuit board, a second circuit board, and a housing assembly as described in any of the above embodiments. The first circuit board is mounted inside a metal housing. The second circuit board is mounted on a plastic cover.

[0021] When the plastic cover is placed over the assembly port, the flexible metal component moves synchronously to the assembly port and contacts the metal casing. This allows the flexible metal component to work with the metal casing to form a relatively complete metal shield, improving the overall electromagnetic shielding effect of the housing assembly. Furthermore, the movement of the flexible metal component along with the plastic cover does not affect the original assembly or disassembly of the plastic cover and metal casing, which helps maintain high installation efficiency for the housing assembly.

[0022] In some embodiments of this application, the second circuit board is disposed on the side of the plastic cover facing the metal casing. A flexible metal component is attached to the side of the second circuit board facing away from the plastic cover. An antenna module is provided on the side of the second circuit board facing the plastic cover.

[0023] The antenna module and the flexible metal component are located on opposite sides of the second circuit board, which helps prevent electrical connection between the flexible metal component and the antenna module from affecting the operation of the antenna module. Furthermore, the flexible metal component separates the antenna module from the first circuit board, helping to prevent electromagnetic interference between them. Simultaneously, the antenna module is not within the electromagnetic shielding enclosure formed by the flexible metal component and the metal casing, thus allowing the antenna module to operate normally. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0025] Figure 1 This is a schematic diagram of the structure of a charging device provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 Explosion diagram of the charging device;

[0027] Figure 3 for Figure 2 A schematic diagram of the structure when the plastic cover, flexible metal parts, and second circuit board are combined;

[0028] Figure 4 for Figure 3 A schematic diagram of the structure when the plastic cover, flexible metal parts, and second circuit board are disassembled.

[0029] Explanation of main component symbols

[0030] 100 - Housing assembly; 200 - Charging device;

[0031] 10-Metal casing; 11-Assembly port; 20-Plastic cover; 21-Cover plate; 22-Side plate; 30-Flexible metal part; 31-First clearance opening; 32-End; 33-Second clearance opening;

[0032] 111 - First edge; 112 - Second edge; 221 - Recessed area; 222 - Clip; 201 - First circuit board; 202 - Second circuit board;

[0033] 2021 - Antenna module; 2022 - Conductive layer; 2023 - Avoidance area; 2024 - Device pins;

[0034] Z - First direction; Y - Second direction; X - Third direction. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0037] The terms “first,” “second,” “third,” etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0038] Charging devices typically use metal as the casing, which facilitates heat dissipation and provides electromagnetic shielding for the magnetic components on the circuit board. In related technologies, for ease of production and installation, the casing has an opening at at least one end, and a plastic component is installed at the opening. This weakens the electromagnetic shielding effect at the opening, resulting in a reduction in the overall electromagnetic shielding effectiveness of the casing.

[0039] Embodiments of this application provide a housing assembly. The housing assembly is used in a charging device. The charging device includes a first circuit board and a second circuit board. The housing assembly includes a metal casing, a plastic cover, and a flexible metal member. The metal casing is configured to accommodate the first circuit board. The metal casing has a mounting opening. The mounting opening is configured to allow the first circuit board to be assembled into the interior of the metal casing. The plastic cover is disposed on the mounting opening. The plastic cover is configured to securely connect to the second circuit board. The flexible metal member is configured to be attached to the second circuit board. When the plastic cover is disposed on the mounting opening, both opposite ends of the flexible metal member abut against the metal casing. The flexible metal member is located at the mounting opening and covers at least a portion of the mounting opening.

[0040] The flexible metal component is fixed to the plastic cover via a second circuit board, allowing it to move along with the cover. When the plastic cover is placed over the assembly opening, the flexible metal component moves synchronously to the opening and contacts the metal housing. Simultaneously, the flexible metal component's attachment to the second circuit board reduces the need for additional supporting parts, thus reducing the number of components and simplifying assembly. The opposing ends of the flexible metal component can establish an electrical connection with the metal housing, allowing the shielding electric field current to pass through the flexible metal component and over the assembly opening. This provides electromagnetic shielding at the assembly opening, enabling the flexible metal component to work with the metal housing to form a relatively complete metal shield, improving the overall electromagnetic shielding effect of the housing assembly. Furthermore, the movement of the flexible metal component with the plastic cover does not affect the original assembly or disassembly of the plastic cover and metal housing, helping to maintain high installation efficiency for the housing assembly.

[0041] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0042] See Figure 1 One embodiment of this application provides a housing assembly 100 and a charging device 200. The housing assembly 100 is applied to the charging device 200 and can serve as the outer casing of the charging device 200. The charging device 200 can be connected between a vehicle alternator and a mobile energy storage device for drawing power from the vehicle alternator to charge the mobile energy storage device; the charging device 200 can also be connected between a vehicle starter battery and a mobile energy storage device for drawing power from the mobile energy storage device to charge the vehicle starter battery.

[0043] See Figure 2 In some embodiments, the charging device 200 includes a first circuit board 201, a second circuit board 202, and a housing assembly 100. The first circuit board 201 and the second circuit board 202 are mounted inside the housing assembly 100.

[0044] See Figure 2 and Figure 3 In some embodiments, the housing assembly 100 is used in the charging device 200. The charging device 200 includes a first circuit board 201 and a second circuit board 202. The housing assembly 100 includes a metal casing 10, a plastic cover 20, and a flexible metal member 30. The metal casing 10 is configured to accommodate the first circuit board 201. The metal casing 10 has a mounting opening 11. The mounting opening 11 is configured to allow the first circuit board 201 to be fitted into the interior of the metal casing 10. The plastic cover 20 is disposed on the mounting opening 11. The plastic cover 20 is configured to securely connect to the second circuit board 202. The flexible metal member 30 is configured to be attached to the second circuit board 202. When the plastic cover 20 is disposed on the mounting opening, both opposite ends of the flexible metal member 30 abut against the metal casing 10. The flexible metal member 30 is located at the mounting opening 11 and covers at least a portion of the mounting opening 11. Figure 2 Flexible metal part 30 is not shown in the figure.

[0045] The flexible metal component 30 is fixed to the plastic cover 20 via the second circuit board 202, allowing it to move together with the plastic cover 20. Therefore, when the plastic cover 20 is placed over the assembly opening 11, the flexible metal component 30 moves synchronously to the assembly opening 11 and contacts the metal housing 10. Simultaneously, the flexible metal component 30 is attached to the second circuit board 202, reducing the need for additional supporting components and simplifying installation. The opposite ends of the flexible metal component 30 can establish an electrical connection with the metal housing 10, allowing the current carrying the shielding electric field to pass through the flexible metal component 30 across the assembly opening 11. This enables the flexible metal component 30 to provide electromagnetic shielding at the assembly opening 11, thus forming a relatively complete metal cover with the metal housing 10 and improving the overall electromagnetic shielding effect of the housing assembly 100. Furthermore, the flexible metal part 30 moves together with the plastic cover 20, which does not affect the original assembly or disassembly of the plastic cover 20 and the metal shell 10, thus helping to maintain the high installation efficiency of the shell assembly 100.

[0046] Understandably, in some embodiments, the metal casing 10 is formed into a cavity shell by fabricating a metal material. In other embodiments, the metal casing 10 may have a protective layer or buffer layer applied to its inner or outer side, based on the cavity shell formed by fabricating a metal material; that is, the metal casing 10 may not only include metal material, but may also include other materials in addition to metal material, and the metal casing 10 can form a metal cover through its metal material to form electromagnetic shielding.

[0047] Understandably, in some embodiments, the flexible metal part 30 is conductive foam, which can be electrically connected to the metal casing 10 and can also adapt to the shape of the second circuit board 202 and the plastic cover 20 for easy attachment. In other embodiments, the flexible metal part 30 can be other conductive materials that are easy to change shape, such as conductive silicone.

[0048] See Figure 2 In some embodiments, the assembly opening 11 has two opposing first edges 111 and two opposing second edges 112. A first direction is defined as parallel to the distribution of the two first edges 111, a second direction is defined as parallel to the distribution of the two second edges 112, and a third direction is defined as parallel to the direction in which the plastic cover 20 is disposed on the metal housing 10, and the first direction, the second direction, and the third direction intersect each other. The first direction is parallel to the direction indicated by Z in the figure, the second direction is parallel to the direction indicated by Y in the figure, and the third direction is parallel to the direction indicated by X in the figure. For ease of reference to the figures, the first direction will be referred to as "first direction Z", the second direction as "second direction Y", and the third direction as "third direction X" in the following text. For example, the first direction Z, the second direction Y, and the third direction X are mutually perpendicular.

[0049] See Figure 2 and Figure 3 In some embodiments, the distance between the two first edges 111 is less than the distance between the two second edges 112. The opposite ends of the flexible metal part 30 respectively contact the opposite side walls of the metal housing 10 where the two first edges 111 are located.

[0050] The flexible metal part 30 can span the assembly opening 11, thereby improving the electromagnetic shielding effect of the flexible metal part 30. Furthermore, since the flexible metal part 30 spans the two opposite sides of the two shortly spaced first edges 111, it can extend in the second direction Y and abut against the metal casing 10. Compared to the first direction Z, the flexible metal part 30 has a larger contact area with the metal casing 10 in the second direction Y, thus improving the electromagnetic shielding effect.

[0051] In some embodiments, the side of the plastic cover 20 facing the metal housing 10 is configured to hold the second circuit board 202. A flexible metal element 30 is attached to the side of the second circuit board 202 facing away from the plastic cover 20. Exemplarily, along a third direction X, the second circuit board 202 is substantially located between the plastic cover 20 and the flexible metal element 30. The flexible metal element 30 can separate the first circuit board 201 and the second circuit board 202, which helps to prevent electromagnetic interference between the first circuit board 201 and the second circuit board 202.

[0052] In some embodiments, an antenna module 2021 is provided on the side of the second circuit board 202 facing the plastic cover 20. The antenna module 2021 and the flexible metal part 30 are respectively on both sides of the second circuit board 202, which helps to avoid the flexible metal part 30 and the antenna module 2021 being electrically connected and affecting the operation of the antenna module 2021. Furthermore, the flexible metal part 30 can separate the antenna module 2021 from the first circuit board 201, which helps to avoid electromagnetic interference between the first circuit board 201 and the antenna module 2021. At the same time, the antenna module 2021 is not within the electromagnetic shielding cover formed by the flexible metal part 30 and the metal casing 10, so the antenna module 2021 can operate normally.

[0053] See Figure 3 and Figure 4 In some embodiments, the second circuit board 202 has a conductive layer 2022 on the side facing away from the plastic cover 20. The flexible metal part 30 is configured to be attached to and electrically connected to the conductive layer 2022. The flexible metal part 30 and the conductive layer 2022 of the second circuit board 202 are electrically connected, so that the flexible metal part 30 can cooperate with the second circuit board 202 to form an electromagnetic shielding cover covering the assembly opening 11, which helps to increase the area of ​​the electromagnetic shielding cover covering the assembly opening 11 and improve the overall electromagnetic shielding effect of the housing assembly 100.

[0054] In some embodiments, the conductive layer 2022 has a clearance region 2023. Device pins 2024 of the second circuit board 202 extend from the clearance region 2023. The flexible metal member 30 is provided with a first clearance opening 31. When the flexible metal member 30 is attached to the conductive layer 2022, the first clearance opening 31 is configured to allow the device pins 2024 to pass through. The device pins 2024 extend from the clearance region 2023 to avoid electrical connection with the conductive layer 2022. By providing the first clearance opening 31, the flexible metal member 30 covers the mounting opening 11 while avoiding electrical connection with the device pins 2024, providing electromagnetic shielding while facilitating the connection of electrical components to the second circuit board 202.

[0055] It is understood that in some embodiments, the device pin 2024 is a structure formed on the other side of the second circuit board 202 when an electrical component is mounted on one side of the second circuit board 202. In other embodiments, the device pin 2024 may also be a connector that facilitates electrical connection between the second circuit board 202 and other components.

[0056] See Figure 2 and Figure 3 In some embodiments, a portion of the flexible metal element 30 is clamped between the plastic cover 20 and the metal housing 10. Under the clamping force of the plastic cover 20 and the metal housing 10, the flexible metal element 30 can stably abut against the metal housing 10, thereby maintaining the electromagnetic shielding effect of the flexible metal element 30.

[0057] Understandably, in some embodiments, the flexible metal component 30 can undergo elastic deformation. Under the clamping and engagement of the plastic cover 20 and the metal casing 10, the flexible metal component 30 elastically resists the metal casing 10 through elastic deformation, thereby ensuring a stable electrical connection between the flexible metal component 30 and the metal casing 10 and improving the stability of the electromagnetic shielding effect.

[0058] See Figure 2 and Figure 4 In some embodiments, the plastic cover 20 includes a cover plate 21 and a side plate 22. The cover plate 21 covers the mounting opening 11. The side plate 22 is disposed around the edge of the cover plate 21. The side plate 22 extends into the mounting opening 11 and is connected to the metal housing 10. The end 32 of the flexible metal part 30 is attached to the side plate 22 and located between the side plate 22 and the metal housing 10. The flexible structure of the flexible metal part 30 facilitates the bending of its end 32 to the side plate 22, and the side plate 22 can cooperate with the metal housing 10 to clamp the flexible metal part 30.

[0059] The side plate 22 extends into the metal housing 10 to facilitate the alignment of the plastic cover 20 and the metal housing 10, and also helps to stably fix the plastic cover 20 to the metal housing 10. The end 32 of the flexible metal part 30 is attached to and fixed to the side plate 22, and can move with the side plate 22. With the help of the side plate 22, the end 32 of the flexible metal part 30 can easily enter the interior of the metal housing 10 and abut against the wall of the metal housing 10.

[0060] In some embodiments, the side plate 22 is provided with a recessed region 221. The end 32 of the flexible metal member 30 is attached to the area of ​​the recessed region 221. And the thickness of the end 32 of the flexible metal member 30 is greater than the recessed depth of the recessed region 221. For example, the side plates 22 of the plastic cover 20 on both opposite sides along the first direction Z are provided with recessed regions 221.

[0061] By providing the recessed area 221, the position of the end 32 of the flexible metal part 30 is easily positioned, facilitating the fixing of the flexible metal part 30 and the plastic cover 20. Furthermore, the end 32 of the flexible metal part 30 can protrude from the recessed area 221, allowing the side plate 22 and the metal casing 10 to clamp the end 32 of the flexible metal part 30, thus improving the stability of the contact between the flexible metal part 30 and the metal casing 10.

[0062] In some embodiments, the side plate 22 is provided with a buckle 222. The flexible metal part 30 is provided with a second recess 33. The second recess 33 allows the buckle 222 to extend out and engage with the metal housing 10.

[0063] By setting the second clearance opening 33, when the flexible metal part 30 is attached to the side plate 22, it can bypass the location of the buckle 222. This not only avoids affecting the engagement between the buckle 222 and the metal shell 10, but also allows the part of the flexible metal part 30 near the buckle 222 to be subjected to greater clamping force under the engagement of the buckle 222 and the metal shell 10. This facilitates maintaining the contact engagement between the flexible metal part 30 and the metal shell 10, thereby maintaining the electromagnetic shielding effect.

[0064] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A housing assembly for use in a charging device, the charging device comprising a first circuit board and a second circuit board, characterized in that, The housing assembly includes: A metal housing is configured to house the first circuit board, and the metal housing has an assembly opening configured to allow the first circuit board to be assembled into the interior of the metal housing. A plastic cover is provided on the assembly port, and the plastic cover is configured to fix the second circuit board to the assembly port; A flexible metal component is configured to be attached to the second circuit board. When the plastic cover is placed over the assembly opening, both opposite ends of the flexible metal component abut against the metal housing. The flexible metal component is located at the assembly opening and covers at least a portion of the assembly opening.

2. The housing assembly according to claim 1, characterized in that, The flexible metal component is partially clamped between the plastic cover and the metal casing.

3. The housing assembly according to claim 1, characterized in that, The side of the plastic cover facing the metal casing is configured to fix the second circuit board, and the side of the second circuit board facing away from the plastic cover is provided with a conductive layer. The flexible metal part is configured to be attached to the conductive layer and electrically connected to the conductive layer.

4. The housing assembly according to claim 3, characterized in that, The conductive layer has a clearance area, from which the device pins of the second circuit board extend. The flexible metal part has a first clearance opening, which is configured to allow the device pins to pass through when the flexible metal part is attached to the conductive layer.

5. The housing assembly according to claim 1, characterized in that, The assembly opening has two first edges opposite each other along a first direction and two second edges opposite each other along a second direction. The distance between the two first edges is less than the distance between the two second edges. The two opposite ends of the flexible metal part respectively contact the opposite side walls where the two first edges of the metal shell are located. The first direction and the second direction intersect.

6. The housing assembly according to any one of claims 1 to 5, characterized in that, The plastic cover includes a cover plate and a side plate. The cover plate covers the assembly opening. The side plate is arranged around the edge of the cover plate, extends into the assembly opening and is connected to the metal housing. The end of the flexible metal part is attached to the side plate and located between the side plate and the metal housing.

7. The housing assembly according to claim 6, characterized in that, The side plate has a recessed area, the end of the flexible metal part is attached to the area of ​​the recessed area, and the thickness of the end of the flexible metal part is greater than the recessed depth of the recessed area.

8. The housing assembly according to claim 6, characterized in that, The side plate is provided with a buckle, and the flexible metal part is provided with a second clearance opening, which allows the buckle to extend out and engage with the metal casing.

9. A charging device, characterized in that, It includes a first circuit board, a second circuit board, and a housing assembly as described in any one of claims 1 to 8, wherein the first circuit board is installed inside the metal housing, and the second circuit board is installed in the plastic cover.

10. The charging device according to claim 9, characterized in that, The second circuit board is located on the side of the plastic cover facing the metal casing, the flexible metal part is attached to the side of the second circuit board away from the plastic cover, and an antenna module is provided on the side of the second circuit board facing the plastic cover.

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