Charging device

Abstract

The utility model discloses a charging device, which comprises a shell, a battery module, a telescopic line module and a mainboard module, the battery module, the telescopic line module and the mainboard module are arranged in the shell, the battery module and the telescopic line module are respectively and electrically connected with the mainboard module, and the shell comprises a first direction and a second direction which are perpendicular to each other. The telescopic line module and the mainboard module are located on the same side of the battery module in the first direction, and the mainboard module is located on the side of the telescopic line module in the second direction. The telescopic line module, the mainboard module and the battery module are arranged in the first direction, the telescopic line module and the mainboard module are arranged in the second direction, namely, the telescopic line module, the mainboard module and the battery module are arranged in the two directions perpendicular to each other, the internal space of the shell is fully utilized, the internal structure of the shell is more compact, and the service life of the shell is prolonged. The charging device is prevented from being too large in size in a certain direction to affect carrying, the overall size of the charging device can be reduced, and therefore the effects of achieving the telescopic function and reducing the overall size are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic device accessories, in particular to a charging device. Background Art

[0002] At present, mobile phones have become essential tools that people carry with them in their daily lives, and their usage frequency is increasing in the process of life and work. However, the battery life of mobile phones is limited. During outdoor activities, people will choose to carry a mobile power supply with them to charge their mobile phones outdoors.

[0003] For existing mobile power supplies, in order to facilitate use and carrying, telescopic data cables are selected to be provided. When needed, the data cable is pulled out to the required length, and when not needed, the data cable can be stored inside the mobile power supply. However, setting a telescopic data cable will cause the volume of the mobile power supply to increase, and the mobile power supply needs to be small in volume to be convenient to carry. Therefore, how to balance the characteristics of the data cable telescopic function and small volume has become an urgent problem for those skilled in the art to solve. Summary of the Utility Model

[0004] In view of this, the utility model provides a new charging device to solve the above problems.

[0005] A charging device provided in this application includes a housing, and a battery module, a telescopic cable module, and a main board module installed in the housing. The battery module and the telescopic cable module are respectively electrically connected to the main board module. The housing includes a first direction and a second direction that are perpendicular to each other. The telescopic cable module and the main board module are located on the same side of the battery module in the first direction, and the main board module is located on one side of the telescopic cable module in the second direction.

[0006] In some embodiments, the main board module and the telescopic cable module are arranged closely. The main board module includes a substrate and a plurality of electrical components provided on the substrate. The area where the telescopic cable module is projected onto the substrate in the second direction is a first installation position. A second installation position is also provided on the substrate. The first installation position and the second installation position together form the front and back two sides of the substrate, and at least part of the electrical components are provided on the second installation position.

[0007] In some embodiments, the second installation position includes a main installation position on the side away from the telescopic cable module and a secondary installation position on the side close to the telescopic cable module. The secondary installation position is located on the outer periphery of the first installation position, and at least part of the electrical components are provided on the secondary installation position.

[0008] In some embodiments, the secondary installation position includes a plurality of sub-installation positions, and the plurality of sub-installation positions are arranged at intervals along the circumferential direction of the telescopic cable module, and the electrical components are provided on the sub-installation positions.

[0009] In some embodiments, the substrate includes four side portions connected end to end, the substrate includes a plurality of spaced-apart corners, and the sub-mounting positions are located on one side of the corners close to the telescopic wire module.

[0010] In some embodiments, for the electrical components on the same side as the telescopic wire module, the side away from the substrate does not extend beyond the side of the telescopic wire module away from the substrate.

[0011] In some embodiments, the electrical components include a capacitor disposed in one of the sub-mounting positions, and the capacitor extends along the second direction; and / or

[0012] the electrical components include a connector disposed in one of the sub-mounting positions, the telescopic wire module includes a telescopic wire housing, a telescopic wire circuit board mounted on the telescopic wire housing, and a wire received in the telescopic wire housing, at least a part of the telescopic wire circuit board is located outside the telescopic wire housing, and the connector connects the telescopic wire circuit board and the substrate; and / or

[0013] the electrical components include a light-emitting element disposed in one of the sub-mounting positions.

[0014] In some embodiments, the second mounting position further includes a mounting portion, the mounting portion is located between two adjacent sub-mounting positions in the first direction, and the mounting portion is provided with a charging port and / or control buttons.

[0015] In some embodiments, the electrical components further include an inductor, and the inductor is located on the side of the substrate away from the telescopic wire module.

[0016] In some embodiments, the telescopic wire module includes a wire, one end of the wire is a plug, the housing includes a receiving groove for receiving the plug, and the receiving groove is located on the side of the main board module away from the battery module in the first direction.

[0017] In some embodiments, the housing further includes a base shell connected to the receiving groove to form a closed space, the receiving groove is provided on one side of the base shell in the first direction, and one end of the base shell close to the receiving groove is inclined towards the center of the receiving groove.

[0018] In the charging device provided by the present invention, the telescopic cable module, the mainboard module and the battery module are arranged in a first direction, and the telescopic cable module and the mainboard module are arranged in a second direction. That is, the telescopic cable module, the mainboard module and the battery module are arranged in two directions perpendicular to each other, making full use of the space inside the shell to make its internal structure more compact, avoiding the charging device from being too large in a certain direction and affecting portability, and facilitating reducing the overall volume of the charging device, thereby achieving the effect of taking into account the telescopic function and reducing the overall volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a charging device provided in one embodiment of the present utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the charging device with part of the outer shell removed;

[0021] Figure 3 for Figure 2 The assembly diagram of the battery module, telescopic cable module and mainboard module shown in FIG;

[0022] Figure 4 for Figure 3 Schematic diagram of the assembly of the telescopic cable module and the mainboard module shown in ;

[0023] Figure 5 for Figure 4 The structural diagram of the mainboard module is shown in FIG;

[0024] Figure 6 for Figure 5 Schematic diagram of another perspective of the motherboard module shown in .

[0025] In the figure: 10, charging device; 12, outer shell; 14, battery module; 16, telescopic wire module; 18, mainboard module; 20, telescopic wire housing; 22, wire; 24, plug; 26, accommodating groove; 28, base shell; 30, telescopic wire circuit board; 32, substrate; 34, electrical component; 321, first mounting position; 323, second mounting position; 325, main mounting position; 327, auxiliary mounting position; 328, sub-mounting position; 329, mounting part; 37, corner; 40, capacitor; 44, connector; 46, light-emitting component; 48, charging port; 50, control button; 52, capacitor. DETAILED DESCRIPTION

[0026] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, outside, top, bottom...) are only used to explain the relative position relationship between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] It should also be noted that when an element is referred to as being “fixed on” or “disposed on” another element, the element may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0029] See also Figures 1 to 6 One embodiment of the present invention provides a charging device 10 for charging electronic devices such as mobile phones. The charging device 10 includes a housing 12, a battery module 14, a retractable cable module 16, and a motherboard module 18. The battery module 14, the retractable cable module 16, and the motherboard module 18 are all mounted inside the housing 12. The battery module 14 and the retractable cable module 16 are electrically connected to the motherboard module 18, thereby electrically connecting the battery module 14 and the retractable cable module 16. The retractable cable module 16 has a retractable function. When needed, the cable can be pulled out to an appropriate length to prevent it from being too long or too short. When not in use, the cable can be stored inside the housing 12, making it convenient for users to use and carry.

[0030] In this application, the charging device 10 is a mobile power supply, and the battery module 14 includes a battery. The battery is electrically connected to the telescopic wire module 16 through the mainboard module 18. When the telescopic wire module 16 is electrically connected to the mobile phone, the battery can provide power to the mobile phone, thereby charging the mobile phone.

[0031] The housing 12 includes a first direction X and a second direction Z that are perpendicular to each other. The telescopic cable module 16 and the mainboard module 18 are located on the same side of the battery module 14 in the first direction X, and the mainboard module 18 is located to the side of the telescopic cable module 16 in the second direction Z. That is, the telescopic cable module 16 and the battery module 14, and the mainboard module 18 and the battery module 14, are arranged in the first direction X, and the telescopic cable module 16 and the mainboard module 18 are located on the same side of the battery module 14. The mainboard module 18 and the telescopic cable module 16 are arranged in the second direction Z. By arranging the telescopic cable module 16, the mainboard module 18, and the battery module 14 in two different directions, the internal space of the housing 12 can be fully utilized, making the internal structure of the charging device 10 more compact. This prevents the charging device 10 from being too large in a certain direction, which would affect portability and use, and helps reduce the overall volume of the charging device 10, thereby achieving the effect of both achieving the telescopic function and reducing the overall volume.

[0032] In the present application, the contour shape of the housing 12 is generally rectangular. The first direction X is the length direction of the housing 12, the second direction Z is the thickness direction of the housing 12. The telescopic wire module 16 and the battery module 14, as well as the main board module 18 and the battery module 14, are arranged along the length direction of the housing 12, and the telescopic wire module 16 and the main board module 18 are arranged along the thickness direction of the housing 12. The telescopic wire module 16 and the main board module 18 have relatively small dimensions in the thickness direction. Stacking the telescopic wire module 16 and the main board module 18 in the thickness direction can make full use of the installation space of the housing 12 in the thickness direction to reduce the overall volume.

[0033] The number of batteries is multiple, and the multiple batteries are electrically connected to the main board module 18 respectively to increase the capacitance of the battery module 14. The length direction of the battery is the same as the first direction X of the housing 12, that is, the length direction, and the two batteries are arranged along the third direction Y perpendicular to the first direction X and the second direction Z, that is, the width direction of the housing. Specifically, the number of batteries is two.

[0034] It should be noted that for the convenience of description in the present application, the following takes the first direction X as the length direction, the second direction Z as the thickness direction, and the third direction Y as the width direction as an example for description, but it does not limit that the first direction X must be the length direction, the second direction Z must be the thickness direction, and the third direction Y must be the width direction. For example, when the housing is circular, the first direction X and the third direction Y can also be two mutually perpendicular diameter directions.

[0035] In an embodiment, the telescopic wire module 16 includes a telescopic wire housing 20, a wire reel, and a wire 22. The telescopic wire housing 20 is installed inside the housing 12, the wire reel is rotatably installed inside the telescopic wire housing 20, and one end of the wire 22 is relatively fixed to the wire reel and the other end can extend out of the housing 12 to be connected to an electronic device such as a mobile phone. When in need of use, the wire 22 can be pulled outwards, and the wire 22 drives the wire reel to rotate. When not in use, the wire reel can be rotated in the opposite direction and drive the wire 22 to retract, so that the wire 22 is wound around the wire reel, thereby accommodating the wire 22 inside the housing 12.

[0036] One end of the wire 22 is a plug 24, and the plug 24 can extend out of the housing 12 to be connected to the electronic device. One end of the housing 12 is provided with a receiving groove 26 for accommodating the plug 24. The receiving groove 26 is located on the side of the circuit board away from the battery module 14 in the first direction X, that is, one end of the housing 12 in the length direction is provided with the receiving groove 26. When the wire 22 is not in use, it can be wound around the wire reel, and the plug 24 can be received in the receiving groove 26 to reduce the obtrusiveness of the plug 24 when not in use.

[0037] The housing 12 further includes a base shell 28 that is connected to the accommodation groove 26 to form a closed space. The accommodation groove 26 is provided on one side of the base shell 28 in the first direction X. One end of the base shell 28 near the accommodation groove 26 is inclined towards the center of the accommodation groove 26, so that one end of the charging device 10 near the accommodation groove 26 visually forms a tightened effect. Specifically, the base shell 28 includes an upper base shell and a lower base shell. The upper base shell covers the lower base shell, and the battery module 14, the telescopic wire module 16, and the main board module 18 are located between the upper base shell and the lower base shell.

[0038] Specifically, the outer surface of one end of the housing 12 is an arc surface, so that the circumferential dimension of the end of the housing 12 provided with the accommodation groove 26 gradually decreases in the direction away from the battery module 14 to form a tightened effect.

[0039] The telescopic wire module 16 further includes a telescopic wire circuit board 30 installed in the telescopic wire housing 20. The wire 22 is electrically connected to the telescopic wire circuit board 30, and the telescopic wire circuit board 30 is then connected to the main board module 18, so as to achieve the effect of electrically connecting the wire 22 and the main board module 18.

[0040] It can be understood that the telescopic wire circuit board 30 can be integrally installed inside the telescopic wire housing 20, or part of it can be located inside the telescopic wire housing 20 and part of it can be located outside the telescopic wire housing 20. In this embodiment, at least part of the telescopic wire circuit board 30 is located outside the telescopic wire housing 20, and the part of the telescopic wire circuit board 30 protruding outside the telescopic wire housing 20 is electrically connected to the main board module 18 through an electrical connector 44, so that the telescopic wire module 16 and the main board module 18 are electrically connected.

[0041] In one embodiment, the main board module 18 includes a substrate 32 and a plurality of electrical components 34 provided on the substrate 32. The substrate 32 is located on one side of the telescopic wire module 16 in the second direction Z, and the electrical components 34 are provided on one side of the substrate 32 close to and / or away from the telescopic wire module 16.

[0042] Specifically, the main board module 18 is attached to the telescopic wire module 16, that is, the main board module 18 is attached to the telescopic wire housing 20. One side of the substrate 32 close to the telescopic wire module 16 is closely arranged with the telescopic wire module 16. It can be understood that the substrate 32 is as close as possible to the telescopic wire module 16, and there is a small gap between the substrate 32 and the telescopic wire module 16 to accommodate the solder joints on the substrate 32. The substrate 32 is closely arranged with the telescopic wire module 16 to reduce the space occupied by the main board module 18 and the telescopic wire module 16 in the thickness direction.

[0043] The area where the telescopic wire module 16 projects onto the substrate 32 in the second direction Z is the first mounting position 321. The substrate 32 is also provided with a second mounting position 323. The first mounting position 321 and the second mounting position 323 together constitute the two opposite surfaces of the substrate 32. It should be noted that the substrate 32 is plate-shaped, and the two opposite surfaces of the substrate are the two opposite surfaces of the substrate, which are also the two surfaces that can connect the electrical components 34. For example, the projection formed by the telescopic wire module 16 on the front surface of the substrate 32 in the second direction Z, the part of the substrate 32 that coincides with this projection is the first mounting position 321, and the part of the front surface of the substrate 32 outside this projection and the back surface are jointly called the second mounting position 323. At least part of the electrical components 34 are arranged on the second mounting position 323. The first mounting position 321 can be used for the telescopic wire module 16 to be installed, and the second mounting position 323 can be used for the electrical components 34 to be installed, so that some electrical components 34 can be on the same side of the substrate 32 as the telescopic wire module 16 and on the circumferential outside of the telescopic wire module 16, which is beneficial to reducing the overall thickness of the charging device 10.

[0044] The second mounting position 323 includes a main mounting position 325 on the side away from the telescopic wire module 16 and a secondary mounting position 327 on the side close to the telescopic wire module 16. The secondary mounting position 327 is located on the outer periphery of the first mounting position 321. At least part of the electrical components 34 are arranged on the secondary mounting position 327. That is, some electrical components 34 are on the same side of the substrate 32 as the telescopic wire module 16, making full use of the mounting space outside the telescopic wire module 16 on the substrate 32 to reduce the overall thickness of the charging device 10. Preferably, the electrical components 34 arranged on the same side of the telescopic wire module 16 include capacitors. The larger the volume of the capacitor, for example, when the diameter of the capacitor is the same, the higher the height in the second direction Z, the better the charging effect of the mobile power supply.

[0045] Specifically, the circumferential dimension of the substrate 32 is larger than the circumferential dimension of the telescopic wire housing 20. The projection of the telescopic wire housing 20 in the second direction Z is entirely located inside the substrate 32.

[0046] The specific shapes of the substrate 32 and the telescopic wire housing 20 are not limited. For example, they can be rectangular, circular, other polygons, etc. Moreover, the shapes of the substrate 32 and the telescopic wire housing 20 can be the same or different, as long as a part of the projection of the substrate 32 in the thickness direction is located outside the circumferential of the telescopic wire housing 20.

[0047] The secondary mounting position 327 includes a plurality of sub-mounting positions 328. The plurality of sub-mounting positions 328 are arranged at intervals along the circumferential direction of the telescopic wire module 16. Each sub-mounting position 328 is provided with an electrical component 34, so that some electrical components 34 surround the circumferential outside of the telescopic wire module 16, making the arrangement of the telescopic wire module 16 and the electrical components 34 more compact.

[0048] The substrate 32 includes a plurality of corners 37 arranged at intervals. The corners 37 protrude outside the telescopic wire module 16. Each corner 37 forms a sub-mounting position 328, that is, a sub-mounting position 328 is formed on the side of each corner 37 close to the telescopic wire module 16. An electrical component 34 is mounted on each corner 37. In this embodiment, the substrate 32 is rectangular and has four corners 37. It should be noted that the substrate 32 being rectangular in this embodiment is understood to mean that the substrate 32 is generally rectangular. In actual production, small recesses are provided at the edges of the substrate 32, which do not affect the overall rectangular shape of the substrate 32 and are all understood to be in a rectangular shape. For example, the four right angles of the rectangle are in an arc shape, and the area of the arc-shaped region accounts for a small proportion of the surface area of the entire substrate 32, and it should be considered to be within the range of a rectangular shape. The telescopic wire housing 20 is generally circular, and the radial length of the telescopic wire housing 20 is not greater than the length and width of the substrate 32, so that the four corners 37 of the substrate 32 protrude outside the telescopic wire housing 20. When the circular telescopic wire housing 20 is assembled with the rectangular substrate 32, a relatively large space can be formed at the corners 37 for mounting the electrical component 34.

[0049] The second mounting position 323 further includes a mounting portion 329 which is located between two adjacent sub-mounting positions 328 in the first direction X, and an electrical component 34 is provided on the mounting portion 329. Specifically, the length of the substrate 32 in the width direction is basically the same as that of the battery module 14. The length of the substrate 32 in the width direction is greater than the length of the telescopic wire housing 20 in the width direction, and the length of the substrate 32 in the length direction is the same as or basically the same as the length of the telescopic wire housing 20 in the length direction. Therefore, in addition to forming four sub-mounting positions 328 at the corners 37, the substrate 32 also forms a mounting portion 329 outside the telescopic wire housing 20 in the width direction. That is, the region of the substrate 32 located outside the circumferential direction of the telescopic wire module 16 further includes the mounting portion 329, and the mounting portion 329 is located between two adjacent sub-mounting positions 328 in the length direction, and an electrical component 34 is mounted on the mounting portion 329.

[0050] The number of the mounting portions 329 can be one or two. In this embodiment, the number of the mounting portions 329 is two, and the two mounting portions 329 are respectively located on opposite sides of the telescopic wire module 16 and are arranged in the width direction.

[0051] Along the second direction Z, for the electrical component 34 located on the sub - mounting position 328, the distance between the side of the electrical component 34 away from the substrate 32 and the substrate 32 is h1, and the distance between the side of the telescopic wire module 16 away from the substrate 32 and the substrate 32 is h2. h1 is not greater than h2. That is, for the electrical component 34 on the same side as the telescopic wire module 16, the side of the electrical component 34 away from the substrate 32 does not extend beyond the side of the telescopic wire module 16 away from the substrate 32. Therefore, arranging the electrical component 34 on the side of the substrate 32 close to the telescopic wire module 16 will not increase the thickness of the charging device 10.

[0052] In one embodiment, the electrical component 34 includes a capacitor 40. The capacitor 40 is arranged at one of the sub - mounting positions 328. The capacitor 40 is on the same side of the substrate 32 as the telescopic wire module 16 and extends along the thickness direction.

[0053] Specifically, the capacitor 40 is column - shaped. The length of the capacitor 40 in the thickness direction is greater than its lengths in the length direction and the width direction, and the length of the capacitor 40 in the thickness direction is less than the length of the telescopic wire module 16.

[0054] The electrical component 34 includes a connector 44. The connector 44 is arranged at one of the sub - mounting positions 328. At least part of the telescopic wire circuit board 30 is located outside the telescopic wire housing 20 and is spaced opposite to the sub - mounting position 328 where the connector 44 is provided. That is, the part of the telescopic wire circuit board 30 located in the telescopic wire housing 20 and a sub - mounting position 328 of the substrate 32 are spaced from each other in the thickness direction. The connector 44 connects the telescopic wire circuit board 30 and the substrate 32, so as to electrically connect the telescopic wire module 16 and the main board module 18, facilitating the connection between the telescopic wire module 16 and the main board module 18.

[0055] The electrical component 34 includes a light - emitting component 46. The light - emitting component 46 is arranged at one of the sub - mounting positions 328 and is on the same side of the substrate 32 as the telescopic wire module 16. There is an avoidance hole on the housing 12 corresponding to the light - emitting component 46, or the part of the housing 12 corresponding to the light - emitting component 46 is a light - transmitting area, enabling the user to view the light generated by the light - emitting component 46.

[0056] Preferably, the light - emitting component 46 includes a plurality of lamp beads, and the number of lit lamp beads can represent the current remaining power of the mobile power supply.

[0057] The electrical component 34 includes a charging port 48 arranged at the mounting part 329. The charging port 48 is used to connect with a charger to charge the battery module 14.

[0058] The electrical component 34 includes a control button 50 arranged at the mounting part 329. The control button 50 is for the user to press to control the startup and shutdown of the mobile power supply.

[0059] In the present application, the electrical component 34 includes two capacitors 40, a connector 44, a light-emitting component 46, a charging port 48, and a control button 50. The two capacitors 40, the connector 44, and the light-emitting component 46 are respectively arranged at four sub-mounting positions 328 of the substrate 32, and the two capacitors 40 are respectively arranged at the two sub-mounting positions 328 of the substrate 32 close to the battery module 14. The charging port 48 and the control button 50 are respectively arranged at two mounting portions 329 of the substrate 32.

[0060] The electrical component 34 further includes an inductor 52 arranged on one side of the substrate 32 away from the telescopic wire module 16. The size of the mounting space between the substrate 32 close to the telescopic wire module 16 and the housing 12 is relatively large in the thickness direction and relatively small in the length and width directions. The size of the mounting space between the substrate 32 away from the telescopic wire module 16 and the housing 12 is relatively small in the thickness direction and relatively large in the length and width directions. The size of the inductor 52 in the length and width directions is greater than that in the thickness direction. That is, among the multiple electrical components 34 of the main board module 18, the capacitors 40 with relatively large thickness direction size and relatively small length and width direction sizes are arranged on the side of the substrate 32 close to the telescopic wire module 16, while the inductor 52 with relatively small thickness direction size and relatively large length and width direction sizes is arranged on the side of the substrate 32 away from the telescopic wire module 16, making full use of the mounting spaces on both sides of the substrate 32, which is beneficial to reducing the overall thickness of the mobile power supply. And except for the inductor 52, the thickness direction sizes of the electrical components 34 arranged at the main mounting position 323 do not exceed the thickness direction size of the inductor 52, effectively reducing the overall thickness of the mobile power supply.

[0061] The above embodiments are only the preferred embodiments of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A charging device, characterized in that, It includes a housing, as well as a battery module, a telescopic wire module, and a main board module installed inside the housing. The battery module and the telescopic wire module are respectively electrically connected to the main board module. The housing includes a first direction and a second direction that are perpendicular to each other. The telescopic wire module and the main board module are located on the same side of the battery module in the first direction, and the main board module is located on one side of the telescopic wire module in the second direction.

2. The charging device according to claim 1, characterized in that The main board module and the telescopic wire module are closely arranged. The main board module includes a substrate and a plurality of electrical components arranged on the substrate. The area where the telescopic wire module is projected onto the substrate along the second direction is the first installation position. There is also a second installation position on the substrate. The first installation position and the second installation position together form the front and back two sides of the substrate, and at least part of the electrical components are arranged on the second installation position.

3. The charging device according to claim 2, characterized in that, The second installation position includes a main installation position on the side away from the telescopic wire module and a secondary installation position on the side close to the telescopic wire module. The secondary installation position is located on the outer periphery of the first installation position, and at least part of the electrical components are arranged on the secondary installation position.

4. The charging device according to claim 3, characterized in that, The secondary installation position includes a plurality of sub-installation positions, and the plurality of sub-installation positions are spaced apart circumferentially along the telescopic wire module. The electrical components are arranged on the sub-installation positions.

5. The charging device according to claim 4, characterized in that, The substrate includes a plurality of spaced-apart corners, and the sub-installation positions are located on the side of the corners close to the telescopic wire module.

6. The charging device according to claim 4, characterized in that For the electrical components located on the same side as the telescopic wire module, the side away from the substrate does not extend beyond the side of the telescopic wire module away from the substrate.

7. The charging device according to claim 4, wherein The electrical components include a capacitor arranged on one of the sub-installation positions, and the capacitor extends along the second direction; and / or The electrical components include a connector arranged on one of the sub-installation positions. The telescopic wire module includes a telescopic wire housing, a telescopic wire circuit board installed in the telescopic wire housing, and a wire received in the telescopic wire housing. At least part of the telescopic wire circuit board is located outside the telescopic wire housing. The connector connects the telescopic wire circuit board and the substrate; and / or The electrical components include a light-emitting component arranged on one of the sub-installation positions.

8. The charging device according to claim 4, wherein The second installation position also includes an installation part, and the installation part is located between two adjacent sub-installation positions in the first direction. The installation part is provided with a charging port and / or control buttons.

9. The charging device according to claim 3, wherein The electrical components also include an inductor, and the inductor is located on the side of the substrate away from the telescopic wire module.

10. The charging device according to any one of claims 1-9, characterized in that, The telescopic wire module includes a wire, and one end of the wire is a plug. The housing includes a receiving groove for accommodating the plug, and the receiving groove is located on the side of the main board module away from the battery module in the first direction.

11. The charging device according to claim 10, characterized in that, The housing also includes a base shell that is connected to the receiving groove to form a closed space. The receiving groove is provided on one side of the base shell in the first direction, and one end of the base shell close to the receiving groove is inclined towards the center of the receiving groove.

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