charger

Abstract

This application discloses a charger, including a housing assembly, a circuit board assembly, and multiple output ports and pins. The circuit board assembly is disposed within the housing assembly and includes a main board, multiple first circuit boards and second circuit boards with different functions. The main board includes a mounting surface. Multiple first circuit boards and multiple second circuit boards are all disposed on the side of the main board with the mounting surface. The circuit boards of the multiple first circuit boards are spaced apart on the mounting surface, and the circuit boards of the first circuit boards are angled to the mounting surface. At least one of the multiple first circuit boards is connected to a second circuit board. Multiple output ports are disposed on a first circuit board, and pins are connected to the housing assembly and electrically connected to a second circuit board. The multiple output ports are exposed on one side wall of the housing assembly, and the pins are exposed on the other side wall of the housing assembly. This application's technical solution can achieve a compact charger structure.

Description

Technical Field

[0001] This application relates to the field of charging equipment technology, and more specifically, to a charger. Background Technology

[0002] Among numerous digital products, chargers are used to charge them. In related technical fields, some chargers feature a single PCB design, where many different electronic components are arranged on one or both surfaces of a circuit board. However, the shapes and sizes of these electronic components vary depending on their functions. Therefore, this single PCB design results in low internal space utilization, hindering miniaturization. Utility Model Content

[0003] This application provides a charger designed to make full use of the charger's internal space to make its structure more compact.

[0004] This application provides a charger, including a housing assembly, a circuit board assembly, and multiple output ports and pins. The circuit board assembly is disposed inside the housing assembly and includes a main board, multiple first circuit boards and second circuit boards with different functions. The main board includes a mounting surface. The multiple first circuit boards and multiple second circuit boards are all disposed on the side of the main board with the mounting surface. The circuit boards of the multiple first circuit boards are arranged at intervals on the mounting surface, and the circuit boards of the first circuit boards are set at an angle to the mounting surface. Each portion of the multiple first circuit boards is connected to a second circuit board. Multiple output ports are located on a first circuit board, and the pins are connected to a housing assembly and electrically connected to a second circuit board. The multiple output ports are exposed on one side wall of the housing assembly, and the pins are exposed on the other side wall of the housing assembly.

[0005] Based on the above embodiments, the charger provided in this application, by setting up multiple circuit boards including a motherboard, a first circuit board, and a second circuit board, and mounting both the first and second circuit boards on one side of the motherboard, with the first circuit board connected to the motherboard and the second circuit board connected to the first circuit board, achieves a stacked utilization of the space on the side of the motherboard with a mounting surface. Specifically, since the first circuit board is connected to the motherboard and the circuit board of the first circuit board forms an angle with the mounting surface, and the second circuit board is connected to the circuit board of the first circuit board, the second circuit board can be protruding from the space on the mounting surface side and positioned next to the electronic components on the circuit board of the first circuit board. Thus, the motherboard, the first circuit board, and the second circuit board are stacked alternately on one side of the mounting surface, which makes fuller use of the space inside the charger, thereby facilitating the miniaturization design of the charger. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 This is a three-dimensional structural diagram of a charger in one embodiment of this application; Figure 2 This is a three-dimensional structural schematic diagram of the charger from another perspective in one embodiment of this application; Figure 3 This is an exploded view of the charger in one embodiment of this application; Figure 4 This is another exploded structural diagram of the charger in one embodiment of this application; Figure 5 This is a three-dimensional structural diagram of the circuit board assembly of the charger in one embodiment of this application; Figure 6 This is a three-dimensional structural schematic diagram of the circuit board assembly of the charger from another perspective in one embodiment of this application; Figure 7 This is an exploded view of the circuit board assembly of the charger in one embodiment of this application; Figure 8 This is another exploded structural diagram of the circuit board assembly of the charger in one embodiment of this application.

[0008] Explanation of reference numerals in the attached figures: 100. Housing assembly; 110. Main housing; 111. Mounting cavity; 112. First sidewall; 120. Bottom cover; 121. Second sidewall; 122. Receiving slot; 130. Decorative cover; 131. Third sidewall; 140. Heat insulation component; 150. Thermal conductive film; 200. Circuit board assembly; 210. Main board; 220. First circuit board; 221. Interface board; 222. PFC board; 223. Rectifier board; 224. Transformer board; 225. X capacitor discharge board; 230. Second circuit board; 231. Display board; 232. Transformer sub-board; 233. Power input board; 240. Electronic screen; 250. Control buttons; 300. Output port; 400. Pin; 500. Charger. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0010] Please refer to Figures 1 to 3 This application provides a charger 500, including a housing assembly 100, a circuit board assembly 200, and multiple output ports 300 and pins 400. The circuit board assembly 200 is disposed within the housing assembly 100 and includes a main board 210, multiple first circuit boards 220 and second circuit boards 230 with different functions. The main board 210 includes a mounting surface. The multiple first circuit boards 220 and multiple second circuit boards 230 are all disposed on the side of the main board 210 with the mounting surface. The circuit boards of the multiple first circuit boards 220 are arranged at intervals on the mounting surface, and the circuit boards of the first circuit boards 220 are arranged at an angle to the mounting surface. At least one of the multiple first circuit boards 220 is connected to a second circuit board 230.

[0011] This application allows for a single first circuit board 220 connected to a second circuit board 230. In this case, there can be one or two second circuit boards 230, with different functions and spaced apart on the same circuit board substrate of the first circuit board 220. Alternatively, there can be two or more first circuit boards 220 each connected to one second circuit board 230, or some of the two or more first circuit boards 220 can have two second circuit boards 230 connected to them. In this case, the number of second circuit boards 230 is two or more. All these layouts allow the second circuit boards 230 to be inserted beside the electronic components on the first circuit board 220, thus fully utilizing the space on the mounting surface of the motherboard 210.

[0012] In this embodiment, multiple output ports 300 are disposed on a first circuit board 220, and pins 400 are connected to the housing assembly 100 and electrically connected to a second circuit board 230. The multiple output ports 300 are exposed on one side wall of the housing assembly 100, and the pins 400 are exposed on the other side wall of the housing assembly 100. It can be understood that the type of output ports 300 in this application can be TYPE-C, TYPE-B, TYPE-A, Lightning interface, etc. For example, they can all be TYPE-C, or they can include at least two of TYPE-C, TYPE-B, TYPE-A, Lightning interface, etc. This application does not limit the type and number of output ports 300.

[0013] The housing assembly 100 of this application has a mounting cavity 111 inside, and the circuit board assembly 200 is housed in the mounting cavity 111. In one embodiment, the housing assembly 100 includes three parts: a main housing 110, a bottom cover 120, and a decorative cover 130. The main housing 110 can be made of insulating material such as plastic. The main housing 110 can be formed into a cylindrical structure with a generally square or racetrack-shaped cross-section, so that it has an opening at least at the lower end in the axial direction to facilitate the installation of the circuit board assembly 200 into the main housing 110.

[0014] The bottom cover 120 is installed at the bottom opening of the main housing 110, while the decorative cover 130 is installed at the top position opposite to the bottom cover 120 of the main housing 110. Thus, the main housing 110, the bottom cover 120 and the decorative cover 130 together form the mounting cavity 111 of the mounting circuit board assembly 200.

[0015] Multiple first circuit boards 220 and multiple second circuit boards 230 are all located on the side of the main board 210 with a mounting surface. Thus, during the assembly process, the main board 210 can be assembled against the inner wall of the main housing 110 forming the mounting cavity 111. The multiple first circuit boards 220 and multiple second circuit boards 230 are stacked between the mounting surface and the inner wall of the other side of the main housing 110. That is, the main board 210, the multiple first circuit boards 220 and the multiple second circuit boards 230 are stacked and arranged between the two opposite inner walls of the main housing 110 to make full use of the space within the housing assembly 100.

[0016] To make the overall circuit board assembly 200 more compact, in one embodiment, the second circuit board 230 does not protrude beyond the edge of the circuit board substrate of the first circuit board 220 away from the main board 210. As mentioned above, the charger 500 of this application is configured with multiple circuit boards with different functions. Here, the second circuit board 230 is connected to a portion of the first circuit board 220, and the structure of the second circuit board 230 is designed not to protrude beyond the edge of the first circuit board 220 away from the main board 210. In this way, during the assembly process of the main board 210, the multiple first circuit boards 220 and the multiple second circuit boards 230 between the two opposing inner walls of the main housing 110, only the main board 210 and the first circuit board 220 need to be used as references. Furthermore, the space occupied by the circuit board substrate of the first circuit board 220 in the direction away from the mounting surface is fully utilized to insert the second circuit, thereby reducing the size of the entire charger 500.

[0017] Based on the above embodiments, the charger 500 provided in this application is configured with multiple circuit boards including a motherboard 210, a first circuit board 220, and a second circuit board. The first circuit board 220 and the second circuit board 230 are both mounted on one side of the motherboard 210, with the first circuit board 220 connected to the motherboard 210 and the second circuit board 230 connected to the first circuit board 220. This achieves a stacked utilization of the space on the side of the motherboard 210 with a mounting surface. Specifically, since the first circuit board 220 is connected to the motherboard 210 and the circuit board of the first circuit board 220 forms an angle with the mounting surface, and the second circuit board 230 is connected to the circuit board of the first circuit board 220, the second circuit board 230 can be protruding from the space on the mounting surface side and positioned next to the electronic components on the circuit board of the first circuit board 220. Thus, the motherboard 210, the first circuit board 220, and the second circuit board 230 are stacked alternately on one side of the mounting surface, making fuller use of the space within the charger 500 and thus facilitating the miniaturization design of the charger 500.

[0018] In one embodiment, the housing assembly 100 includes a first sidewall 112 and a second sidewall 121 disposed adjacent to each other. Multiple output ports 300 are exposed on the first sidewall 112, and pins 400 are exposed on the second sidewall 121. In this embodiment, the output ports 300 and pins 400 are respectively disposed on the adjacent first sidewall 112 and second sidewall 121. During use of the charger 500, the second sidewall 121 faces the charging socket. Taking the charging socket as a horizontally placed example, the second sidewall 121 forms the bottom surface of the outer housing assembly of the charger 500. At this time, the output ports 300 on the first sidewall 112 face horizontally, and the data cable connected to the output port 300 also extends horizontally. This prevents the data cable from twisting or deforming at the end connected to the output port 300 and also facilitates cable management.

[0019] It is understood that in other embodiments, the first sidewall 112 and the second sidewall 121 may not be adjacent, but rather spaced apart. For example, when the second sidewall 121 is the bottom surface during the use of the charger 500, the first sidewall 112 may be the top surface of the entire housing assembly 100, and the output port 300 may be facing upwards.

[0020] Please refer to the reference. Figure 3 and Figure 4In one embodiment, when the first sidewall 112 and the second sidewall 121 are arranged adjacent to each other, the housing assembly 100 further includes a third sidewall 131, which is arranged opposite to the second sidewall 121 and respectively connected to both ends of the first sidewall 112; the first circuit board 220 includes an interface board 221, the surface of which faces the first sidewall 112, and a plurality of output ports 300 are disposed on the interface board 221; the second circuit board 230 includes a display board 231, which is connected to the circuit board of the interface board 221 and faces the third sidewall 131. The charger 500 also includes an electronic screen 240 electrically connected to the display panel 231, which displays information on the third sidewall 131. In this embodiment, the main housing 110 has a first sidewall 112, the bottom housing is formed as a second sidewall 121, and the decorative cover 130 is formed as a third sidewall 131. The electronic screen 240 can be adhered to the surface of the display panel 231 facing the third sidewall 131, and the decorative cover 130 can have a partially light-transmitting design, with the light-transmitting part facing the electronic screen 240, so that the information displayed on the electronic screen 240 can be emitted outward from the decorative cover 130. In this embodiment, the electronic screen 240 can be used to display information such as voltage and remaining time during the charging process, allowing users to more intuitively grasp the charging status and making it more convenient to use.

[0021] In another embodiment, a control button 250 is also included. The control button 250 is electrically connected to the display panel 231 and is disposed on the third side wall 131. In this embodiment, the control button 250 can be a touch button, a mechanical button, etc. The control button 250 can realize, for example, the on / off control of the entire charger 500, mode selection control, etc. And since the control button 250 is disposed on the third side like the electronic screen 240, it is more convenient for the user to operate the charger 500 when it is in use, because the third side wall 131 faces the user.

[0022] To improve the ease of use of the charger 500, in one embodiment, the plug 400 is rotatably connected to the housing assembly 100, and a receiving groove 122 is provided on the second side wall 121. During the rotation of the plug 400 relative to the housing assembly 100, the plug 400 has a folded state where it is stored in the receiving groove 122 and an unfolded state where it extends outward from the receiving groove 122. In this embodiment, a spring, torsion spring, or other structure can be provided on the housing assembly 100 to elastically act on the plug 400, so that when the plug 400 is to be retracted into the receiving groove, it can automatically fall into the receiving groove 122 at a certain angle, thereby facilitating folding and storage. After storage, a small external force is not easily able to damage the stored state of the plug 400, thus satisfying the requirements of small structural size and easy portability.

[0023] Understandably, during operation, the charger 500 converts AC mains power into low-voltage DC power usable by the device. This conversion process roughly includes EMI filtering, rectification, PFC, high-voltage DC / DC converter, low-voltage rectification, output filtering, low-voltage DC / DC converter, and protocol control. To achieve this entire process, the circuit board contains numerous electronic components. Previous designs placed these components on a single circuit board, resulting in low space utilization within the charger 500. To address this issue, please refer to the reference... Figures 5 to 6 In this embodiment, based on the circuit board design including a motherboard 210, an interface board 221, and a display board 231, the first circuit board 220 further includes a PFC board 222. The PFC board 222 is disposed on the side of the motherboard 210 away from the interface board 221, and the circuit board of the PFC board 222 is substantially parallel to the circuit board of the interface board 221. The PFC inductor on the PFC board 222 is disposed on the surface of the circuit board facing the interface board 221. In this embodiment, by setting an independent PFC module, the effects of improving power utilization, reducing grid pollution, and adapting to wide voltage input can be achieved. Furthermore, by disposing of the PFC board 222 on the side of the motherboard 210 away from the interface board 221, and by disposing of the PFC inductor on the surface of the circuit board facing the interface board 221, the space on the mounting side of the motherboard 210 can be fully utilized without exposing it outside the motherboard 210 area, thus making the structure of the entire circuit assembly compact.

[0024] In one embodiment, please refer to the reference Figures 5 to 8 The first circuit board 220 also includes a rectifier board 223, the circuit board of the rectifier board 223 is disposed adjacent to the circuit board of the interface board 221, and the rectifier elements on the rectifier board 223 are disposed on the surface of its circuit board facing away from the interface board 221.

[0025] In one embodiment, the first circuit board 220 further includes a transformer board 224, and the second circuit board 230 further includes a transformer sub-board 232. The transformer board 224 is located between the PFC inductor and the rectifier element, and the transformer sub-board 232 is connected to the circuit board of the transformer board 224. Furthermore, the circuit board of the transformer sub-board 232 is parallel to the main board 210, and the resonant capacitor, peripheral circuits, and auxiliary power supply circuits on the transformer sub-board 232 are located on the surface of its circuit board facing the main board 210. Similarly, in this embodiment, two independent modules are provided in the transformer circuit, which can improve efficiency during voltage conversion and reduce signal interference.

[0026] Furthermore, the first circuit board 220 also includes an X capacitor discharge board 225, and the second circuit board 230 also includes a power input board 233. The power input board 233 is connected to the circuit board of the X capacitor discharge board 225 and is electrically connected to the pin 400. The display panel 231, the rectifier board 223, and the X capacitor discharge board 225 are arranged sequentially along the length of the circuit board substrate of the interface board 221.

[0027] It should be noted that in this embodiment, the circuit boards included in the first circuit board 220 are all arranged perpendicular to the motherboard 210. This maximizes the use of the space on the mounting surface of the motherboard 210. The circuit boards of the second circuit board 230 are arranged perpendicular to the first circuit board 220. They can be arranged parallel to the mounting surface of the motherboard 210, perpendicular to the mounting surface of the motherboard 210, or at an angle to the mounting surface of the motherboard 210. The specific arrangement can be flexibly adjusted according to the space on the mounting surface of the motherboard 210. This makes full use of the space on the mounting surface of the motherboard 210, thereby minimizing the size of the entire circuit board assembly 200 and making the charger 500 compact.

[0028] During the charging operation of the charger 500, the circuit board assembly 200 will generate heat. It is understood that the charger 500 provided in this application embodiment meets the basic heat dissipation requirements. In order to achieve a high heat dissipation efficiency, this application embodiment utilizes the motherboard 210 for heat dissipation. The gaps between the transformer board 224, transformer small board 232, PFC board 222, rectifier board 223, X capacitor discharge board 225 and power input board 233 are filled with thermally conductive adhesive, and the thermally conductive adhesive is bonded to the mounting surface.

[0029] In other words, during the assembly process of the charger 500 of this application, the other parts of the circuit board assembly 200 can be assembled and potted without installing the interface board 221 and the display board 231. After potting, the interface board 221 and the display board 231 are then assembled onto the main board 210 to form a complete circuit board assembly 200. With this structure, each small board of the circuit board assembly 200 can quickly transfer the heat generated during operation to the main board 210, and then dissipate it from the main board 210 to the outside of the housing assembly 100, thereby meeting the internal operating temperature control requirements of the charger 500.

[0030] In order to improve the user experience and ensure the stability of the charger 500 during operation, such as reducing the temperature of the area of ​​the housing component 100 that the user can touch, in one embodiment, a heat insulation member 140 is provided on the side of the circuit board of the interface board 221 that is away from the first sidewall 112. Alternatively, heat insulation members 140 are provided on both the side of the circuit board of the interface board 221 facing away from the first sidewall 112 and the side facing the first sidewall 112.

[0031] The heat insulation component 140 can be made of a material with good insulation and poor thermal conductivity, such as plastic. With the heat insulation component 140, even if the circuit components of this application are relatively compact, resulting in a close distance between the interface board 221 and the transformer board 224 and transformer sub-board 232, and the transformer board 224 and transformer sub-board 232 generate a lot of heat during operation, the heat dissipated towards the interface board 221 can be blocked by the heat insulation component 140, thereby reducing the temperature on the interface board 221 side. This ensures stable electrical signal output during charging, and the user will not feel the temperature is too high when plugging and unplugging the charging cable.

[0032] The same measures in this application are also applied to the display panel 231, wherein a heat insulation component 140 is also provided on the side of the display panel 231 facing away from the third side wall 131. Similarly, because the display panel 231 and the electronic screen 240 are blocked by the heat insulation component 140, the temperature will not be too high, which will cause abnormal signal transmission and result in abnormal display of the electronic screen 240.

[0033] As mentioned above, in this embodiment of the application, the circuit components other than the interface board 221 and the display board 231 are potted with glue so that the heat generated by the operation of multiple circuit boards can be dissipated through the motherboard 210 to the housing assembly 100. In order to improve the efficiency of heat transfer from the motherboard 210 to the housing assembly 100, a heat-conducting film 150 is also provided on the inner wall surface of the housing assembly 100. And / or, an insulating member is provided on the side of the motherboard 210 facing away from the mounting surface, and a thermally conductive film 150 is provided on the insulating member to transfer heat to the housing assembly 100. The thermally conductive film 150 may be a graphene film. Through the design of this thermally conductive film 150, heat can be evenly distributed in the housing assembly 100 except for the parts corresponding to the interface board 221 and the display board 231. It is understood that the thermally conductive film 150 may be provided on multiple inner wall surfaces of the main housing 110, or the thermally conductive film 150 may be simultaneously provided in locations of high heat dissipation requirements in the circuit board assembly 200. Furthermore, the thermally conductive film 150 may be a single piece or may consist of multiple pieces; this application does not impose any limitations on this.

[0034] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A charger, characterized in that, include: Housing assembly; A circuit board assembly, disposed within the housing assembly, the circuit board assembly comprising: The motherboard includes a mounting surface; Multiple first and second circuit boards with different functions are provided on one side of the motherboard having the mounting surface. The circuit boards of the multiple first circuit boards are arranged at intervals on the mounting surface, and the circuit boards of the first circuit boards are set at an angle to the mounting surface. At least one of the multiple first circuit boards is connected to a second circuit board. Multiple output ports and pins are provided on a first circuit board, and the pins are connected to the housing assembly and electrically connected to a second circuit board, wherein the multiple output ports are exposed on one side wall of the housing assembly and the pins are exposed on the other side wall of the housing assembly.

2. The charger as described in claim 1, characterized in that, The housing assembly includes a first sidewall and a second sidewall arranged adjacent to each other, with the plurality of output ports exposed on the first sidewall and the pins exposed on the second sidewall.

3. The charger as described in claim 2, characterized in that, The housing assembly further includes a third sidewall, which is disposed opposite to the second sidewall and respectively connected to both ends of the first sidewall; The first circuit board includes an interface board, the surface of which faces the first sidewall, and the plurality of output ports are disposed on the interface board. The second circuit board includes a display screen, which is connected to the circuit board of the interface board and faces the third sidewall. The charger also includes an electronic screen electrically connected to the display panel, which displays information on the third sidewall.

4. The charger as described in claim 3, characterized in that, It also includes control buttons, which are electrically connected to the display panel and located on the third side wall.

5. The charger as described in claim 3, characterized in that, A heat insulation component is provided on the side of the circuit board of the interface board that faces away from the first sidewall. Alternatively, the circuit board of the interface board may have heat insulation components on both the side facing away from the first sidewall and the side facing the first sidewall.

6. The charger of claim 3, wherein A heat insulation component is also provided on the side of the display panel facing away from the third sidewall.

7. The charger as described in any one of claims 3 to 6, characterized in that, The first circuit board further includes a PFC board, which is disposed on the side of the main board away from the interface board. The circuit board of the PFC board is substantially parallel to the circuit board of the interface board, and the PFC inductor on the PFC board is disposed on the surface of the circuit board facing the interface board.

8. The charger as described in claim 7, characterized in that, The first circuit board further includes a rectifier board, the circuit board of the rectifier board is disposed adjacent to the circuit board of the interface board, and the rectifier elements on the rectifier board are disposed on the side of its circuit board facing away from the interface board.

9. The charger as described in claim 8, characterized in that, The first circuit board further includes a transformer board, and the second circuit board further includes a transformer sub-board. The transformer board is located between the PFC inductor and the rectifier element, and the transformer sub-board is connected to the circuit board of the transformer board.

10. The charger of claim 9, wherein, The circuit board of the transformer board is parallel to the main board, and the resonant capacitor, peripheral circuits, and auxiliary power supply circuits on the transformer board are located on the side of its circuit board facing the main board.

11. The charger of claim 9, wherein, The first circuit board further includes an X-capacitor discharge board, and the second circuit board further includes a power input board. The power input board is connected to the circuit board of the X-capacitor discharge board and is electrically connected to the pins. The display panel, the rectifier board, and the X capacitor discharge board are arranged sequentially along the length of the circuit board substrate of the interface board.

12. The charger of claim 10, wherein, The gaps between the transformer board, the transformer sub-board, the PFC board, the rectifier board, the X capacitor discharge board, and the power input board are filled with thermally conductive adhesive, and the thermally conductive adhesive is bonded to the mounting surface.

13. The charger of any one of claims 1 to 6, 8 to 12, wherein, The second circuit board does not protrude beyond the edge of the circuit board substrate of the first circuit board on the side away from the motherboard.

14. The charger as described in any one of claims 1 to 6, 8 to 12, characterized in that, A heat-conducting film is also provided on the inner wall surface of the housing assembly; And / or, an insulating element is provided on the side of the motherboard facing away from the mounting surface, and a heat-conducting film is provided on the insulating element to transfer heat to the housing assembly.

15. The charger as described in any one of claims 2 to 6, 8 to 12, characterized in that, The pin is rotatably connected to the housing assembly, and a receiving groove is provided on the second side wall. During the rotation of the pin relative to the housing assembly, the pin has a folded state in which it is stored in the receiving groove and an unfolded state in which it extends outward from the receiving groove.

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