Wireless charger and vehicle-mounted charging support

Abstract

The utility model discloses a wireless charger and a vehicle-mounted charging support. The wireless charger comprises a housing, a charging coil and a driving assembly. The driving assembly drives the charging coil to reciprocate along a first direction parallel to the bearing surface of the bearing part. Compared with the scheme that the driving assembly drives the charging coil to rotate, the requirement for the space in the shell is smaller, and the size of the shell is reduced. Furthermore, in the scheme, the first direction is parallel to the bearing surface of the bearing part, and compared with the scheme that the first direction is perpendicular to the bearing surface, the position of the charging coil can be matched more conveniently, so that the charging efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of wireless charging, in particular to a wireless charger and a vehicle-mounted charging bracket. Background Art

[0002] The wireless charger includes a charging coil for generating a changing magnetic field. The receiving coil of the device to be charged generates an induced current after acquiring the changing magnetic field, thereby enabling wireless charging of the device to be charged. In the related art, it is difficult to match the receiving coils at different positions, resulting in low charging efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a wireless charger and a vehicle-mounted charging bracket, which can improve the efficiency of wireless charging.

[0004] To achieve the above object, the utility model provides a wireless charger, comprising:

[0005] The housing comprises a carrying portion, wherein the carrying portion is suitable for carrying a device to be charged;

[0006] A charging coil, disposed in the housing, the charging coil being suitable for wirelessly charging the device to be charged;

[0007] A driving assembly, disposed in the housing and connected to the charging coil, the driving assembly being used to drive the charging coil to move;

[0008] The driving assembly drives the charging coil to reciprocate along a first direction, and the first direction is parallel to the bearing surface of the bearing portion.

[0009] In some embodiments, the driving component is configured to drive the charging coil to move to a charging position before the charging coil starts charging, and the charging position is a position with the highest output power in the movement path of the charging coil driven by the driving component.

[0010] In some embodiments, the carrying portion includes a light-transmitting panel, the light-transmitting panel is used to carry the device to be charged, and the charging coil is visible through the light-transmitting panel.

[0011] In some embodiments, the wireless charger further comprises a light emitting element, wherein the light emitting element is disposed in the housing and is used to illuminate the charging coil.

[0012] In some embodiments, the wireless charger includes a first circuit board, the charging coil is electrically connected to the first circuit board, and the driving component is configured to drive the first circuit board to move, thereby driving the charging coil to move;

[0013] The light emitting element is electrically connected to the first circuit board, and the light emitting element is arranged inside the charging coil.

[0014] In some embodiments, the wireless charger further includes a second circuit board, the second circuit board is connected to the housing, and the second circuit board is electrically connected to the first circuit board or electrically isolated from the first circuit board;

[0015] The first circuit board is used to control the charging coil and the light emitting element, and the second circuit board is used to control the driving component.

[0016] In some embodiments, the driving assembly includes a driving part and a transmission part connected to the driving part, the transmission part includes a support base, the support base is connected to the charging coil, the wireless charger also includes a guide rail, the axis of the guide rail is parallel to the first direction, the support base includes a first slider slidably connected to the guide rail, and the driving part drives the support base to reciprocate along the guide rail along the first direction.

[0017] In some embodiments, the transmission part further comprises a screw, the axis of the screw is parallel to the first direction, the support seat comprises a second slider sleeved on the screw, the second slider has an internal thread matched with the screw;

[0018] The driving portion is configured to drive the screw to rotate around its own axis so as to drive the second sliding block to reciprocate along the first direction.

[0019] In some embodiments, the drive assembly also includes a deceleration part arranged between the driving part and the transmission part, the deceleration part includes a first gear and a second gear that are meshed with each other, the first gear is connected to the driving part, the second gear is connected to the screw, and the number of teeth of the first gear is less than the number of teeth of the second gear.

[0020] In some embodiments, the wireless charger includes two guide rails arranged opposite to each other along the second direction, and the support base includes two first sliders, and the two first sliders are slidably connected to the two guide rails in a one-to-one correspondence;

[0021] The support seat further includes a support plate, the two first sliding blocks are connected to one side of the support plate along the first direction, and the second sliding block is connected to the other side of the support plate along the first direction;

[0022] The screw rod is located at one side of the two guide rails along the first direction, and along the second direction, the screw rod is located between the two guide rails.

[0023] In some embodiments, both ends of the guide rail are connected to fixed protrusions respectively, and the support seat reciprocates between the two fixed protrusions;

[0024] The driving assembly is further configured to drive the support base to move to a reset position after the charging coil is finished charging, and the reset position is a position where the support base abuts against one of the fixed protrusions.

[0025] In some embodiments, the carrying portion includes a light-transmitting panel, and the wireless charger further includes an infrared sensor, and the infrared sensor is used to sense whether the light-transmitting panel carries the device to be charged;

[0026] The infrared sensor is arranged at the inner side of the charging coil and moves along with the charging coil. Within the movement range of the charging coil, the infrared sensor is visible on the light-transmitting panel.

[0027] In some embodiments, the wireless charger also includes a temperature sensor, which is used to monitor the temperature of the device to be charged. When the temperature sensor detects that the temperature of the device to be charged is higher than a preset temperature, the driving component drives the charging coil to move to reduce the charging power of the charging coil.

[0028] The embodiment of the second aspect of the utility model further provides a vehicle-mounted charging bracket, comprising:

[0029] A wireless charger as described in any of the above items; and

[0030] A positioning assembly is connected to the housing, and is used to position the device to be charged so as to fix the relative position of the device to be charged and the bearing portion.

[0031] In some embodiments, the positioning assembly includes a supporting portion, a first clamping arm, and a second clamping arm, the supporting portion being suitable for supporting the device to be charged, the supporting portion being configured to be displaced downward relative to the carrying portion under the gravity of the device to be charged, and during the displacement process, the first clamping arm and the second clamping arm are driven to move in directions toward each other, so that the first clamping arm and the second clamping arm are suitable for jointly clamping the lateral sides of the device to be charged.

[0032] In some embodiments, the vehicle-mounted charging bracket further includes a magnetic element and a first circuit board, the first circuit board is electrically connected to the charging coil, and the magnetic element is connected to the supporting portion;

[0033] When the magnetic element moves with the supporting portion relative to the charging coil, the charging coil generates an induced current, and the first circuit board obtains the induced current and generates a signal indicating the start of charging or generates a signal indicating the end of charging.

[0034] In some embodiments, the positioning assembly includes a magnetic bracket, and the magnetic bracket is used to absorb the magnetic component of the device to be charged to position the device to be charged.

[0035] In some embodiments, the vehicle-mounted charging bracket further includes a micro switch, the micro switch is disposed in the shell and connected to the shell, the supporting portion includes an abutting protrusion located in the shell, and the supporting portion is configured to be subjected to the gravity of the device to be charged and is displaced downward to the lowest point relative to the bearing portion, the abutting protrusion presses and closes the micro switch, and when the supporting portion does not support the device to be charged, the abutting protrusion is separated from the micro switch;

[0036] The vehicle-mounted charging bracket also includes a first circuit board, which is electrically connected to the charging coil and the micro switch. When the micro switch is pressed and closed by the abutment protrusion, the first circuit board generates a signal indicating the start of charging. When the micro switch is separated from the abutment protrusion, the first circuit board generates a signal indicating the end of charging.

[0037] Compared with the prior art, the beneficial effects of the utility model are:

[0038] In the technical solution of the present utility model, the wireless charger includes a shell, a charging coil and a driving component. Before each charging starts, the driving component can drive the charging coil to move, so as to adapt to the position of the device to be charged, so as to make the charging efficiency higher. Moreover, in the present utility model, the driving component drives the charging coil to reciprocate along the first direction, which requires less space in the shell and reduces the volume of the shell compared to the solution in which the driving component drives the charging coil to rotate. Furthermore, in this solution, the first direction is parallel to the bearing surface of the bearing portion, which can more easily match the position of the charging coil, thereby improving the charging efficiency, compared to the solution in which the first direction is perpendicular to the bearing surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0040] Figure 1 is a three-dimensional schematic diagram of a wireless charger according to an embodiment of the present invention;

[0041] Figure 2 is a first cross-sectional schematic diagram of a wireless charger according to an embodiment of the present invention;

[0042] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0043] Figure 4 is a second cross-sectional schematic diagram of a wireless charger according to an embodiment of the present invention;

[0044] Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0045] Figure 6 It is a first exploded schematic diagram of a wireless charger according to an embodiment of the present invention;

[0046] Figure 7 is a cross-sectional schematic diagram of a wireless charger after explosion from a first viewing angle according to an embodiment of the present invention;

[0047] Figure 8 is a third cross-sectional schematic diagram of a wireless charger according to an embodiment of the present invention;

[0048] Fig. 9 for Figure 8 A partial enlarged schematic diagram of point C in the middle;

[0049] Fig.10 is a cross-sectional schematic diagram of a wireless charger after explosion at a second viewing angle according to an embodiment of the present invention;

[0050] Fig.11 A three-dimensional schematic diagram of an assembly of some internal components of a wireless charger according to an embodiment of the present invention;

[0051] Fig.12 An exploded schematic diagram of an assembly of some internal components of a wireless charger according to an embodiment of the present invention;

[0052] Fig.13 is a cross-sectional schematic diagram of a wireless charger after explosion at a second viewing angle in another embodiment of the present invention;

[0053] Fig.14 It is a partial schematic diagram of a wireless charger in another embodiment of the present invention;

[0054] Fig.15 Fig.14 A partial enlarged schematic diagram of point D in the middle.

[0055] Description of Figure Numbers:

[0056] Wireless charger 10;

[0057] Housing 100;

[0058] Carrying part 110; light-transmitting panel 111;

[0059] Charging coil 200;

[0060] A drive assembly 300;

[0061] Driving part 310; transmission part 320; first gear 321; second gear 322; screw 323; support seat 324; support plate 3241; first slider 3242; second slider 3243; groove 3244; first wall 3245;

[0062] First circuit board 410; second wall surface 411; electronic component 412; second circuit board 420; light emitting component 430; sensor 440;

[0063] Guide rail 500;

[0064] Positioning assembly 600;

[0065] Supporting portion 610; magnetic element 611; micro switch 612; abutting protrusion 613; first clamping arm 620; second clamping arm 630;

[0066] First direction X;

[0067] The second direction Y;

[0068] The third direction Z.

[0069] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] The wireless charger includes a charging coil for generating a changing magnetic field. The receiving coil of the device to be charged generates an induced current after acquiring the changing magnetic field, thereby enabling wireless charging of the device to be charged. In the related art, when the wireless charger is only adapted to one type of device to be charged, if the placement position of the device to be charged on the wireless charger is different each time, the charging coil needs to be driven to a position that matches the position of the receiving coil of the device to be charged before the wireless charger starts charging. When the wireless charger needs to adapt to different types of devices to be charged, the positions of the receiving coils of different types of devices to be charged are different, so the charging coil also needs to be driven to a position that matches the position of the receiving coil of the device to be charged before the wireless charger starts charging.

[0072] In order to adapt to the different layout positions of the power receiving coil of the device to be charged, the applicant initially considered that a driving component could be set to drive the charging coil. When the device to be charged is placed on the wireless charger, the charging coil is driven to move to a position that matches the power receiving coil of the device to be charged before wireless charging begins. However, it was later discovered that the position matching process of the charging coil and the power receiving coil is relatively complicated. After multiple wireless charging processes, the charging coil generally needs to travel a long distance to match the position of the power receiving coil (i.e., the average distance of the charging coil's movement at the beginning of each charging is longer), which makes the charging preparation time too long.

[0073] See also Figure 1-Figure 6 , the wireless charger 10 includes a housing 100, a charging coil 200 and a driving assembly 300. The housing 100 includes a bearing portion 110, and the bearing portion 110 is suitable for bearing a device to be charged. The device to be charged may be a mobile phone, a watch, a tablet or a computer, or other electronic devices capable of wireless charging. For ease of description, the device to be charged is taken as an example of a mobile phone. The mobile phone can be placed on the bearing portion 110 when wireless charging is performed. In some embodiments, the bearing portion 110 may be used only to support the mobile phone, and the mobile phone can be placed at any position on the bearing portion 110. In other embodiments, in addition to supporting the mobile phone, the bearing portion 110 may also be used to locate the relative position of the mobile phone therewith. For example, a groove may be provided on the bearing portion 110, and the mobile phone can be embedded in the groove, so that when the bearing portion 110 carries the mobile phone, the relative position of the mobile phone and the bearing portion 110 is fixed (or the mobile phone can only move within a small range relative to the bearing portion 110), and thus the relative position of the mobile phone's power receiving coil and the wireless charger 10 is fixed. See. Figure 6 In this embodiment, the carrying portion 110 is in the shape of a flat plate and is only used to support a mobile phone.

[0074] The charging coil 200 is disposed in the housing 100, and the charging coil 200 is suitable for wireless charging of the device to be charged. Specifically, the charging coil 200 can generate a changing magnetic field after being energized, and the receiving coil of the mobile phone generates an induced current after obtaining the changing magnetic field, thereby realizing wireless charging of the mobile phone. When the charging coil 200 is wirelessly charged, it is necessary to match the position of the receiving coil of the mobile phone. The larger the overlapping area of ​​the charging coil 200 and the receiving coil in the direction parallel to the axis of the charging coil 200, the higher the charging power and charging efficiency. Therefore, when the charging coil 200 starts charging, it is necessary to maximize the overlapping area of ​​the charging coil 200 and the receiving coil in the direction parallel to the axis of the charging coil 200, thereby improving the charging power and charging efficiency.

[0075] In order to improve the charging power and efficiency, in some embodiments, a charging mark can be set on the carrier 110, and the charging mark marks the best charging position to guide the user to place the mobile phone. After the user places the mobile phone on the carrier 110 according to the marked position, the overlapping area between the power receiving coil and the charging coil 200 is larger, so that the wireless charger 10 has better charging power and charging efficiency. However, in the above scheme, the user is required to adjust the relative layout of the mobile phone and the wireless charger 10, and the charging coil 200 is passively matched with the power receiving coil, which has poor reliability, and the user cannot know the specific position of the power receiving coil inside the mobile phone, and it is difficult to ensure the precise matching of the power receiving coil and the charging coil 200. In view of this, see Figure 3 , Figure 6 as well as Figure 7 In this embodiment, the charging coil 200 actively matches the position of the power receiving coil. Specifically, a driving component 300 is provided in the housing 100, and the driving component 300 is connected to the charging coil 200. The driving component 300 is used to drive the charging coil 200 to move. The driving component 300 can drive the charging coil 200 to move to a position that matches the position of the power receiving coil, so that the user does not need to finely adjust the relative position of the mobile phone and the wireless charger 10 when performing wireless charging, which reduces the user's operating difficulty.

[0076] In some embodiments, when the current charging is completed, the charging coil 200 can maintain the current position, and when the next charging is performed, the driving component 300 adjusts the charging coil 200 to a position that matches the power receiving coil of the mobile phone. In this solution, the driving component 300 only needs to adjust the position of the charging coil 200 once during one charging process, and the internal operation of the wireless charger 10 is simpler. However, the applicant has found that based on inertia, the relative positions of different types of devices to be charged placed on the carrier 110 by users are generally not much different (the devices to be charged are generally placed near the center of the carrier 110). However, when the wireless charger 10 charges different types of devices to be charged, even if the relative positions of different types of devices to be charged and the wireless charger 10 are the same, the positions of the power receiving coils in each device to be charged are different, so the relative positions of the power receiving coils and the charging coil 200 will also be different.

[0077] Based on the above principle, by counting the arrangement positions of different types of power receiving coils, assuming that the relative positions of all types of devices to be charged and the carrier 110 are the same, a position with the most suitable total distance from multiple power receiving coils can be found, so that each time the charging coil 200 is charged, it is reset to the above position, so that the charging coil 200 is more convenient to match the power receiving coils of different types of devices to be charged. Specifically, in this embodiment, the driving component 300 is configured to drive the charging coil 200 to move from the charging position to the reset position after the charging coil 200 is charged, wherein the charging position is the position of the charging coil 200 when the device to be charged is powered, and the reset position is the position of the charging coil 200 when it is not powered. In other words, after each charging is completed, the charging coil 200 is reset. Compared with the solution in which the charging coil 200 remains in the original position (the position of the charging coil 200 when charging) after each charging is completed, the charging coil 200 in this solution is in a specific position before the next charging starts. Therefore, the specific orientation of the reset position can be designed in advance according to the type of device to be charged that needs to be adapted, so that at the beginning of each charging, the charging coil 200 can move as short a distance as possible to adapt to the position of the power receiving element of the device to be charged. The charging response efficiency of the wireless charger 10 is higher, the charging preparation time is shorter, and the device to be charged can be charged more quickly.

[0078] It should be noted that, in some embodiments, the position of the charging coil 200 is fixed during wireless charging, in which case the charging position is a single position, that is, the position of the charging coil 200 during charging. In other embodiments, the charging coil 200 may be switched during wireless charging, in which case the charging position is the position of the charging coil 200 when the wireless charger 10 generates a signal indicating the end of charging.

[0079] In some embodiments, the reset position may be the position set before the wireless charger 10 leaves the factory. After the wireless charger 10 leaves the factory, the reset position is fixed and cannot be adjusted. In other embodiments, the reset position may be automatically or manually adjusted based on feedback. For example, the relative position of the power receiving coil and the carrier 110 during wireless charging of the device to be charged may be monitored over a period of time to obtain the user's charging habits. Based on the above data, the optimal reset position may be calculated, thereby converting the current reset position into the calculated optimal reset position. After the position conversion, when the subsequent wireless charging ends, it may be reset to the optimal reset position after the conversion.

[0080] Herein, "charging position" and "reset position" are both defined as positions relative to the carrier 110. Moreover, the charging position is a position that is not determined in advance and needs to be determined based on the placement of the device to be charged each time the user charges; while during a single charging process, the reset position is a determined position. In some scenarios, the charging position and the reset position are different positions. In some special scenarios, the charging position and the reset position can be the same position. When the charging position happens to be the same position as the reset position, after charging is completed, the charging coil 200 remains in place.

[0081] The wireless charger 10 has multiple situations in which it indicates "charging is over". In one embodiment, when the wireless charger 10 senses that the mobile phone is fully charged, a signal indicating the end of charging can be generated internally, and at this time, the driving component 300 drives the charging coil 200 to move from the charging position to the reset position. In another embodiment, when the wireless charger 10 senses that the mobile phone is separated from the carrying part 110, a signal indicating the end of charging can be generated internally, and at this time, the driving component 300 drives the charging coil 200 to move from the charging position to the reset position. In another embodiment, when the wireless charger 10 senses charging abnormality, such as abnormal temperature inside the wireless charger 10, abnormal temperature of the mobile phone, or abnormal current, voltage and other parameters inside the wireless charger 10, a signal indicating the end of charging is generated internally by the wireless charger 10, and at this time, the driving component 300 drives the charging coil 200 to move from the charging position to the reset position. In this embodiment, if the wireless charger 10 senses charging abnormality, it can effectively protect the mobile phone by driving the charging coil 200 to reset in time. In this embodiment, if the wireless charger 10 senses a charging abnormality, but finds that the charging position coincides with the reset position or the charging position is close to the reset position, a protection position can be set inside the wireless charger 10. At this time, the driving component 300 does not drive the charging coil 200 to move to the reset position, but drives the charging coil 200 to move to the protection position, thereby effectively protecting the mobile phone.

[0082] The driving assembly 300 can drive the charging coil 200 to move along a straight line, move along a curve, rotate along a curve, or both move and rotate along a curve. Figure 6-Figure 9 , the driving component 300 drives the charging coil 200 to move back and forth along a straight line. In this embodiment, on the one hand, the structure of the driving component 300 is simpler, and on the other hand, the movement dimension of the charging coil 200 is lower, which is more convenient for quickly matching the relative position of the charging coil 200 and the receiving coil.

[0083] When the driving component 300 reciprocates in a straight line, the reset position can be located in the middle or end of the motion stroke. In some embodiments, the driving component 300 is configured to drive the charging coil 200 to reciprocate in a straight line along the first direction X. The reset position is located at the end position along the first direction X within the stroke of the charging coil 200. In this embodiment, before each charging starts, the charging coil 200 is located at the end position within its motion stroke. After charging starts, the driving component 300 only drives the charging coil 200 to move in the first direction X or the reverse direction of the first direction X to match the relative position with the power receiving coil. The charging coil 200 does not need to move back and forth during the position matching process. The maximum moving distance of the charging coil 200 during the matching process is the maximum moving stroke of the charging coil 200 along the first direction X. Compared with the reset position being located in the middle of the charging stroke motion stroke, the maximum delay in the charging preparation process is lower. For example, in this embodiment, when the power receiving coil is located at the end position of the movement stroke of the charging coil 200 and at an end different from the reset position, the charging delay of the wireless charger 10 is the longest, and during the matching process of the charging coil 200, the charging coil 200 needs to move its maximum stroke along the first direction X. When the reset position of the charging coil 200 is located in the middle of its movement stroke, if the charging coil 200 goes in the wrong direction during the matching process, it needs to perform a return motion during its movement. At this time, the movement distance of the charging coil 200 may be greater than its maximum stroke along the first direction X, so the charging preparation time is longer.

[0084] The specific structure of the drive assembly 300 depends on actual needs, see Figure 6-Figure 9 ,as well as Figure 11-Figure 12In some embodiments, the driving assembly 300 includes a driving part 310 and a transmission part 320 connected to the driving part 310. The transmission part 320 includes a support seat 324, and the support seat 324 is connected to the charging coil 200. The wireless charger 10 also includes a guide rail 500, the axis of the guide rail 500 is parallel to the first direction X, the support seat 324 includes a first slider 3242 slidably connected to the guide rail 500, and the driving part 310 drives the support seat 324 to reciprocate along the first direction X on the guide rail 500. Through the sliding cooperation between the guide rail 500 and the first slider 3242, the movement of the support seat 324 can be smoother. In some embodiments, the two ends of the guide rail 500 may be connected to fixed protrusions. In this case, the fixed protrusions at the two ends of the guide rail 500 are not only used to fix the guide rail 500, but also used to limit the movement range of the first slider 3242. When the first slider 3242 moves along the first direction X to abut against one of the fixed protrusions, the support seat 324 moves to one of the end positions within its movement range. When the first slider 3242 moves in the reverse direction of the first direction X to abut against another fixed protrusion, the support seat 324 moves to the other end position within its movement range. In addition, in this embodiment, when the first slider 3242 moves to abut against one of the fixed protrusions, the position of the charging coil 200 is the reset position.

[0085] See also Figure 6-Figure 7 ,as well as Figure 11-Figure 12 In some embodiments, the wireless charger 10 includes two guide rails 500 arranged relatively along the second direction Y, and the support base 324 includes two first sliders 3242. The two first sliders 3242 are slidably connected to the two guide rails 500 in a one-to-one correspondence. The axes of the two guide rails 500 are parallel to the first direction X, and the two guide rails 500 are relatively distributed at intervals along the second direction Y. By providing two guide rails 500, the guidance of the support base 324 is more stable.

[0086] See also Figure 6-Figure 7 ,as well as Figure 11-Figure 12 In some embodiments, the transmission part 320 further includes a screw 323, the axis of the screw 323 is parallel to the first direction X, and the support seat 324 includes a second slider 3243 sleeved on the screw 323, and the second slider 3243 has an internal thread that cooperates with the screw 323. The screw 323 is inserted into the second slider 3243, and bearings are provided at both ends of the screw 323. When the driving part 310 drives the screw 323 to rotate, the second slider 3243 is driven by the screw 323 to reciprocate along the axis direction of the screw 323 (i.e., the first direction X), so that the support seat 324 as a whole reciprocates along the first direction X, and then the charging coil 200 reciprocates along the first direction X. In this embodiment, the support seat 324 is driven by the screw 323, and the driving stability and driving accuracy are higher.

[0087] To further improve the drive accuracy, see Figure 11-Figure 12 In some embodiments, the driving unit 310 may include a driving motor, a first gear 321 and a second gear 322. The driving motor may be a stepping motor, so that the driving accuracy is higher. The first gear 321 is connected to the output shaft of the stepping motor, the second gear 322 is connected to the end of the screw 323, and the first gear 321 is meshed with the second gear 322. During the driving process, the stepping motor drives the first gear 321 to rotate, the first gear 321 drives the second gear 322 to rotate, the second gear 322 drives the screw 323 to rotate, and the screw 323 drives the support seat 324 to translate along the first direction X. Specifically, the number of teeth of the first gear 321 is less than the number of teeth of the second gear 322, so that the rotation speed of the screw 323 is less than the rotation speed of the stepping motor, thereby improving the driving accuracy.

[0088] See also Figure 6 as well as Fig.12 , the support seat 324 also includes a support plate 3241, two first sliders 3242 are connected to one side of the support plate 3241 along the first direction X, and the two first sliders 3242 are correspondingly connected to the two sides of the support plate 3241 along the second direction Y. The second slider 3243 is connected to the other side of the support plate 3241 along the first direction X (i.e., the side opposite to the two first sliders 3242). In this solution, the support seat 324 forms a three-point positioning, and the transmission is more stable compared to the structure in which the screw rod 323 is arranged on the side of the two guide rails 500. The screw rod 323 is located on one side of the two guide rails 500 along the first direction X, and along the second direction Y, the screw rod 323 is located between the two guide rails 500. In other words, in this embodiment, when observed along the first direction X, the screw 323 is located between the two guide rails 500, and in this embodiment, when observed along the second direction Y, the screw 323 is located on one side of the two guide rails 500. In this solution, the distance between the second slider 3243 and the two first sliders 3242 along the first direction X is longer, so that the positioning of the support seat 324 is more stable.

[0089] The charging coil 200 translates along the first direction X to achieve position matching with the receiving coil. When the receiving coil deviates from the charging coil 200 along the second direction Y, the matching degree between the charging coil 200 and the receiving coil is not ideal no matter where the charging coil 200 moves along the first direction X. In view of this, see Figure 6 as well as Figure 8-Figure 9In some embodiments, the support base 324 further includes a support plate 3241, and the charging coil 200 is disposed on a side of the support plate 3241 facing the carrier 110. The guide rail 500, the first slider 3242, the screw 323, the second slider 3243 and the driving unit 310 are all disposed on a side of the support plate 3241 away from the carrier 110. In this solution, since the charging coil 200 and the guide rail 500, the first slider 3242, the screw 323, the second slider 3243 and the drive unit 310 are distributed on different sides of the support plate 3241, the guide rail 500, the first slider 3242, the screw 323, the second slider 3243 and the drive unit 310 will not occupy the space of the charging coil 200 along the second direction Y, and the size of the charging coil 200 along the second direction Y can be maximized. Therefore, when the mobile phone is placed on the carrier 110 in a deviated manner along the second direction Y, the overlapping area between the charging coil 200 and the power receiving coil of the mobile phone can also be maximized, thereby improving the charging power and charging efficiency. Further, the size of the charging coil 200 along the second direction Y can be substantially equal to the size of the inner cavity of the housing 100 along the second direction Y. For example, along the second direction Y, the distance between the two sides of the charging coil 200 and the inner wall of the housing 100 can be less than or equal to two millimeters.

[0090] See also Figure 3 , Figure 6 , Figure 7 , Fig. 9 as well as Fig.10In some embodiments, the wireless charger 10 further includes a first circuit board 410 disposed between the support base 324 and the charging coil 200. The first circuit board 410 is electrically connected to the charging coil 200 and is used to transmit electrical signals to the charging coil 200 or obtain electrical signals generated by the charging coil 200. In order to reduce the thickness of the wireless charger 10 (i.e., the dimension along the third direction Z), the support base 324 has a first wall surface 3245 facing the bearing portion 110, the charging coil 200 is attached to the first wall surface 3245, the first wall surface 3245 is concave with a recessed groove, and the first circuit board 410 is disposed in the recessed groove and is electrically connected to the charging coil 200. In this solution, on the one hand, by providing a sinking groove, the thickness of the support plate 3241 and the first circuit board 410 can be reduced as a whole, thereby reducing the thickness of the wireless charger 10 as a whole; on the other hand, since the first circuit board 410 sinks into the sinking groove, the charging coil 200 can be attached to the support plate 3241. Compared with the structure in which the charging coil 200 is completely attached to the first circuit board 410, in order to achieve the same support area for the charging coil 200, the size of the first circuit board 410 in this embodiment can be smaller, thereby reducing the material cost of the first circuit board 410. In the above embodiment, the first circuit board 410 is fixed to the support seat 324. In other embodiments, the first circuit board 410 can also be fixed to the housing 100, and a wire is provided between the first circuit board 410 and the charging coil 200, and the wire is bent to leave a compensation margin, so that the charging coil 200 and the first circuit board 410 can be electrically connected to each other and both can generate relative movement.

[0091] See also Figure 8-Figure 10 In some embodiments, the wireless charger 10 further includes a second circuit board 420, which is electrically connected to or electrically isolated from the first circuit board 410 (i.e., the two are not electrically connected), and the two together control the internal components of the wireless charger 10. In some embodiments, the first circuit board 410 can control the charging of the charging coil 200 and the light emission of the light-emitting element 430. The second circuit board 420 can control the driving of the driving component 300. In order to facilitate the electrical connection between the two, the sink groove can at least partially penetrate the support seat 324, and the first circuit board 410 is electrically connected to the second circuit board 420 through the portion of the support plate 3241 penetrated by the sink groove. In addition, see Figure 6 as well as Fig. 9, the first circuit board 410 includes a second wall 411 away from the charging coil 200, and the second wall 411 includes an electrical connection area exposed in the sink, and the electrical connection area is connected to an electronic component 412, which can be a resistor, a capacitor, an inductor or a processing chip. In this solution, the position where the electronic component 412 needs to be set on the first circuit board 410 allows the sink to be set through, which on the one hand avoids the position interference between the electronic component 412 and the support plate 3241, and on the other hand can further reduce the overall thickness of the first circuit board 410 and the support plate 3241. In addition, the second circuit board 420 can also be electrically connected to the electrical connection area, thereby facilitating the position arrangement of the intermediate wire. In this embodiment, two circuit boards are used to control the internal components of the wireless charger 10, and the first circuit board 410 is connected to the charging coil 200 and moves synchronously with the charging coil 200, and the second circuit board 420 is fixedly connected to the housing 100. Compared with the structure of using one circuit board to control all the internal components of the wireless charger 10, the control effect of the charging coil 200 is better.

[0092] See also Figure 6 In some embodiments, the carrying part 110 includes a light-transmitting panel 111, which is used to carry the device to be charged, and the charging coil 200 is visible on the light-transmitting panel 111. In this solution, the user can observe the specific position of the charging coil 200 through the light-transmitting panel 111. On the one hand, the user can place the mobile phone according to the specific position of the charging coil 200 observed, which is convenient for the user to actively match the relative position of the receiving coil and the charging coil 200; on the other hand, when the driving component 300 fails, the charging coil 200 can be found in time when it fails to reset to the reset position after charging is completed, so that the wireless charger 10 can be repaired in time. In addition, in particular, when the wireless charger 10 is a mobile phone car holder, the user may not know whether the mobile phone car holder can be wirelessly charged. For example, when the vehicle is rented by the user, it is impossible to accurately understand whether the charging holder on the vehicle can be wirelessly charged. The setting of the light-transmitting panel 111 makes the charging coil 200 visible from the outside, and the user can understand the wireless charging function of the car mobile phone holder by observing the structure of the charging coil 200.

[0093] In order to improve the visibility of the charging coil 200 in a dark environment, in some embodiments, the wireless charger 10 further includes a light emitting element 430. The light emitting element 430 is used to illuminate the interior of the housing 100 so that the user can observe the specific position of the charging coil 200 in the housing 100. When the housing 100 is provided with a light emitting element 430, in one embodiment, the light-transmitting panel 111 can be configured so that the charging coil 200 is not visible when the light-emitting element 430 is turned off (i.e., the light-transmitting panel 111 is a colored translucent panel), so that the appearance of the wireless charger 10 is more concise when it is not working; when the light-emitting element 430 is turned on, the charging coil 200 is visible, so that the user can observe the position of the charging coil 200. In other embodiments, the light-transmitting panel 111 can also be a completely transparent plate, for example, the light-transmitting panel 111 can be a transparent glass plate or a transparent acrylic plate, so that the charging coil 200 can be seen on the light-transmitting panel 111 regardless of whether the light-emitting element 430 is turned on.

[0094] The light emitting element 430 may be disposed at any position in the housing 100 that can illuminate the charging coil 200. In some embodiments, the light emitting element 430 may be connected to the housing 100 and fixed in position, and does not move with the charging coil 200. Figure 3 as well as Figure 6 In some embodiments, the light emitting element 430 is disposed inside the charging coil 200 and is electrically connected to the first circuit board 410. In this solution, on the one hand, since the light emitting element 430 moves with the charging coil 200, the lighting effect of the charging coil 200 is better; on the other hand, since the light emitting element 430 is disposed inside the charging coil 200, the lighting effect of the light emitting element 430 on various parts of the charging coil 200 is more uniform, and the light emitting element 430 can more reasonably utilize the internal space of the charging coil 200, making the internal structure of the wireless charger 10 more compact.

[0095] In order to improve the lighting effect of the charging coil 200, in some embodiments, the shape of the light-emitting element 430 can be circular, the light-emitting element 430 is located on the inner side of the charging coil 200 and the center of the light-emitting element 430 coincides with the center of the charging coil 200, or the light-emitting element 430 is arranged around the outer side of the charging coil 200 and the center of the light-emitting element 430 coincides with the center of the charging coil 200.

[0096] See also Figure 3 , Figure 6 as well as Figure 11-Figure 12In some embodiments, the wireless charger 10 further includes a sensor 440, and the sensor 440 is used to detect whether the bearing part 110 carries a device to be charged. The sensor 440 can be used to generate a signal indicating the start of charging (the wireless charger 10 can also generate a signal indicating the start of charging in other ways). The specific type of sensor 440 depends on actual needs. In some embodiments, the sensor 440 is a pressure sensor 440, which is used to detect the pressure on the bearing part 110. When the sensor 440 detects that the pressure on the bearing part 110 increases, it is determined that the bearing part 110 has carried a mobile phone, so a signal for indicating the start of charging is generated. In other embodiments, when the bearing part 110 includes a light-transmitting panel 111, the sensor 440 can be an infrared sensor, which is used to emit infrared rays. When the mobile phone is carried on the light-transmitting panel 111, the infrared rays are blocked and reflected, and the infrared sensor generates a signal for indicating the start of charging. In a further embodiment, the sensor 440 is disposed inside the charging coil 200. In this solution, the arrangement position of the sensor 440 is more reasonable, and the internal space of the charging coil 200 can be reasonably utilized, making the internal structure of the wireless charger 10 more compact.

[0097] When the mobile phone has a fixed relative position with the carrier 110 each time it is charged, the position matching of the charging coil 200 and the receiving coil is more accurate. Figure 3 , Figure 6 as well as Figure 11-Figure 12 In some embodiments, the wireless charger 10 further includes a positioning component 600, which is connected to the housing 100 and is used to position the device to be charged so as to fix the relative position between the device to be charged and the carrying portion 110. In this solution, after the mobile phone is carried on the carrying portion 110, the position of the mobile phone is fixed by a fixing device, and after the position of the mobile phone is fixed, the position of the mobile phone and the carrying portion 110 are fixed. In other words, the addition of the positioning component 600 allows the position of the mobile phone to be relatively fixed with the carrying portion 110 each time wireless charging is performed. After the position of the mobile phone and the carrying portion 110 is fixed, the position of the power receiving coils of mobile phones of different models varies within a smaller range, which can facilitate the design of the reset position on the one hand, and shorten the moving distance of the charging coil 200 during the charging preparation process on the other hand.

[0098] In order to achieve the positioning of the mobile phone, in some embodiments, the positioning component 600 can be an annular flange connected to the carrying part 110. When the mobile phone is positioned on the carrying part 110, it can be embedded in the annular flange to achieve the position fixation with the carrying part 110. In other embodiments, the positioning component 600 can include a magnetic bracket, and the magnetic bracket can achieve the fixation of the mobile phone by adsorbing the magnetic component on the mobile phone. Figure 6-Figure 7In some embodiments, the positioning assembly 600 may be a gravity bracket. Specifically, the positioning assembly 600 includes a supporting portion 610, a first clamping arm 620, and a second clamping arm 630. The supporting portion 610 is suitable for supporting the device to be charged. The portion of the supporting portion 610 used for supporting the device to be charged is located outside the housing 100, and the end of the supporting portion 610 opposite to the portion used for supporting the device to be charged extends into the housing 100. The supporting portion 610 is connected to the lower end of the housing 100, and its upper end is inserted into the housing 100. The supporting portion 610 is configured to be displaced downward relative to the bearing portion 110 by the gravity of the device to be charged, and a portion of the upper end of the supporting portion 610 gradually extends out of the housing 100 when the supporting portion 610 moves downward. In the process of the upper end of the supporting portion 610 extending out of the housing 100, the first clamping arm 620 and the second clamping arm 630 are driven to move in directions toward each other, so that the first clamping arm 620 and the second clamping arm 630 are suitable for jointly clamping the lateral sides of the device to be charged. After the positioning assembly 600 positions the mobile phone, the supporting part 610 can position the bottom of the mobile phone, the first clamping arm 620 and the second clamping arm 630 position the lateral sides of the mobile phone, and the bearing part 110 positions the back plate of the mobile phone. In this embodiment, the three sides of the mobile phone are all positioned, and the user does not need to adjust the positioning direction during the positioning process, so the positioning process is simpler and the positioning accuracy is higher.

[0099] When the positioning assembly 600 is a gravity bracket, in some embodiments, see Fig.13 , a sensing component can be provided on the supporting portion 610 of the gravity support to sense whether the bearing portion 110 carries a mobile phone. Specifically, a magnetic element 611 can be provided on the portion of the supporting portion 610 extending into the housing 100. The magnetic element 611 can be a permanent magnet or an electromagnet. The magnetic element 611 can generate a magnetic field, and the magnetic element 611 is coupled to the charging coil 200. When the mobile phone is placed on the gravity support, the supporting portion 610 moves downward, thereby driving the magnetic element 611 to move. At this time, the charging coil 200 cuts the magnetic flux lines generated by the magnetic element 611, and then the charging coil 200 generates an induced current. After the first circuit board 410 obtains the above signal, it determines that the mobile phone is carried on the bearing portion 110, and then generates a signal indicating the start of charging. Otherwise, a signal indicating the end of charging is generated. In this solution, only one magnetic element 611 (such as a magnet) needs to be added to determine whether the mobile phone is carried on the carrying part 110. Compared with the structure of setting components such as pressure sensors 440 or infrared sensors, the cost is lower. In addition, the solution of adding the magnetic element 611 does not need to change the structural layout of the electronic components 412 on the first circuit board 410, and the modification cost is lower.

[0100] In another embodiment, see Figure 14-15, a micro switch 612 can also be set in the wireless charger 10, and an abutment protrusion 613 can be set on the side of the part of the supporting part 610 located in the shell 100, and the abutment protrusion 613 is configured to separate from the micro switch 612 when the supporting part 610 is not supporting the mobile phone, and the micro switch 612 is closed at this time; when the supporting part 610 supports the mobile phone, it moves down and presses the micro switch 612. The micro switch 612 is electrically connected to the second circuit board 420, and the second circuit board 420 generates a signal indicating the start of charging after sensing that the micro switch 612 is closed. In this solution, the movement of the supporting part 610 is used to sense whether the mobile phone is carried on the carrying part 110, and the sensing is more accurate. In this solution, the micro switch 612 can not only generate a signal indicating the start of charging, but also generate a signal indicating the end of charging.

[0101] When the wireless charger 10 includes a gravity bracket, and the wireless charger 10 is a vehicle-mounted charging bracket. When the vehicle-mounted charging bracket is used to carry a mobile phone, the charging coil 200 is exposed to the sun, and the problem of excessive temperature causing the internal components to age and break may occur. In view of this, in some embodiments, a partition (not shown in the figure) can be provided in the shell 100, and the partition is provided between the charging coil 200 and the bearing part 110 along the thickness direction of the wireless charger 10 (i.e., the third direction Z), and the partition covers part of the light-transmitting panel 111 when observed along the third direction Z, and the charging coil 200 is configured to be blocked by the partition when in the reset position, so that when the wireless charger 10 is not working, the charging coil 200 will not be exposed to the sun and the temperature will rise and age, thereby improving the service life of the wireless charger 10.

[0102] When the wireless charger 10 includes a gravity bracket, and the wireless charger 10 is a vehicle-mounted charging bracket. When the mobile phone is carried on the wireless charger 10 and wirelessly charged, the temperature of the mobile phone may rise due to exposure to the sun. If the mobile phone is still wirelessly charged at this time, it may cause damage to the mobile phone battery. In view of this, in some embodiments, a component for monitoring the temperature of the mobile phone can be set in the wireless charger 10. When the temperature of the mobile phone is monitored to be too high, for example, when the temperature of the mobile phone is monitored to be higher than sixty degrees Celsius, a signal indicating the end of charging can be generated, and the charging coil 200 is driven to be offset from the receiving coil. At this time, the charging coil 200 can be reset to the reset position, and when the overlapping area of ​​the charging coil 200 with the receiving coil is still large after the charging coil 200 is reset to the reset position, the charging coil 200 can be driven to move to other positions with a larger offset area from the receiving coil, thereby stopping charging the mobile phone. Alternatively, in some embodiments, when the temperature of the mobile phone is monitored to be in a relatively high range, for example, when the temperature of the mobile phone is monitored to be between 40 degrees Celsius and 60 degrees Celsius, the charging coil 200 can be driven to move so that the overlapping area between the charging coil 200 and the power receiving coil is reduced, thereby reducing the charging power to protect the battery.

[0103] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0104] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0105] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A wireless charger, characterized in that: include: The housing comprises a carrying portion, wherein the carrying portion is suitable for carrying a device to be charged; A charging coil, disposed in the housing, the charging coil being suitable for wirelessly charging the device to be charged; A driving assembly, disposed in the housing and connected to the charging coil, the driving assembly being used to drive the charging coil to move; The driving assembly drives the charging coil to reciprocate along a first direction, and the first direction is parallel to the bearing surface of the bearing portion.

2. The wireless charger according to claim 1, characterized in that: The driving component is configured to drive the charging coil to move to a charging position before the charging coil starts charging. The charging position is a position with the highest output power in a movement path of the charging coil driven by the driving component.

3. The wireless charger according to claim 1, wherein: The carrying portion includes a light-transmitting panel, the light-transmitting panel is used to carry the device to be charged, and the charging coil is visible on the light-transmitting panel.

4. The wireless charger according to claim 3, characterized in that: The wireless charger further comprises a light emitting element, which is disposed in the housing and is used to illuminate the charging coil.

5. The wireless charger according to claim 4, characterized in that: The wireless charger comprises a first circuit board, the charging coil is electrically connected to the first circuit board, and the driving component is configured to drive the first circuit board to move, thereby driving the charging coil to move; The light emitting element is electrically connected to the first circuit board, and the light emitting element is arranged inside the charging coil.

6. The wireless charger according to claim 5, characterized in that: The wireless charger further includes a second circuit board, the second circuit board is connected to the housing, and the second circuit board is electrically connected to the first circuit board or electrically isolated from the first circuit board; The first circuit board is used to control the charging coil and the light emitting element, and the second circuit board is used to control the driving component.

7. The wireless charger according to claim 1, wherein: The driving assembly includes a driving part and a transmission part connected to the driving part, the transmission part includes a support base, the support base is connected to the charging coil, the wireless charger also includes a guide rail, the axis of the guide rail is parallel to the first direction, the support base includes a first slider slidably connected to the guide rail, and the driving part drives the support base to reciprocate along the guide rail along the first direction.

8. The wireless charger according to claim 7, wherein: The transmission part further comprises a screw, the axis of which is parallel to the first direction, and the support seat comprises a second slider sleeved on the screw, the second slider having an internal thread matched with the screw; The driving portion is configured to drive the screw to rotate around its own axis so as to drive the second sliding block to reciprocate along the first direction.

9. The wireless charger according to claim 8, characterized in that: The driving assembly also includes a speed reduction portion arranged between the driving portion and the transmission portion, the speed reduction portion includes a first gear and a second gear meshing with each other, the first gear is connected to the driving portion, the second gear is connected to the screw, and the number of teeth of the first gear is less than the number of teeth of the second gear.

10. The wireless charger according to claim 8, wherein: The wireless charger comprises two guide rails arranged opposite to each other along the second direction, and the support seat comprises two first sliders, and the two first sliders are slidably connected to the two guide rails in a one-to-one correspondence; The support seat further includes a support plate, the two first sliding blocks are connected to one side of the support plate along the first direction, and the second sliding block is connected to the other side of the support plate along the first direction; The screw rod is located at one side of the two guide rails along the first direction, and along the second direction, the screw rod is located between the two guide rails.

11. The wireless charger according to claim 10, wherein: Both ends of the guide rail are respectively connected to fixed protrusions, and the support seat reciprocates between the two fixed protrusions; The driving assembly is further configured to drive the support base to move to a reset position after the charging coil is finished charging, and the reset position is a position where the support base abuts against one of the fixed protrusions.

12. The wireless charger according to claim 10, wherein: The carrying portion includes a light-transmitting panel, and the wireless charger further includes an infrared sensor, and the infrared sensor is used to sense whether the light-transmitting panel carries the device to be charged; The infrared sensor is arranged at the inner side of the charging coil and moves along with the charging coil. Within the movement range of the charging coil, the infrared sensor can be seen from the light-transmitting panel.

13. The wireless charger according to claim 10, wherein: The wireless charger also includes a temperature sensor, which is used to monitor the temperature of the device to be charged. When the temperature sensor detects that the temperature of the device to be charged is higher than a preset temperature, the driving component drives the charging coil to move to reduce the charging power of the charging coil.

14. The vehicle-mounted charging bracket is characterized in that: include: The wireless charger according to any one of claims 1 to 13; as well as A positioning assembly is connected to the housing, and is used to position the device to be charged so as to fix the relative position of the device to be charged and the carrying portion.

15. The vehicle-mounted charging bracket according to claim 14, characterized in that: The positioning assembly includes a supporting portion, a first clamping arm and a second clamping arm, the supporting portion is suitable for supporting the device to be charged, and the supporting portion is configured to be displaced downward relative to the bearing portion due to the gravity of the device to be charged, and during the displacement process, the first clamping arm and the second clamping arm are driven to move in directions toward each other, so that the first clamping arm and the second clamping arm are suitable for jointly clamping the lateral sides of the device to be charged.

16. The vehicle-mounted charging bracket according to claim 15, characterized in that: The vehicle-mounted charging bracket further includes a magnetic element and a first circuit board, the first circuit board is electrically connected to the charging coil, and the magnetic element is connected to the supporting portion; When the magnetic element moves with the supporting portion relative to the charging coil, the charging coil generates an induced current, and the first circuit board obtains the induced current and generates a signal indicating the start of charging or generates a signal indicating the end of charging.

17. The vehicle-mounted charging bracket according to claim 14, characterized in that: The positioning assembly includes a magnetic bracket, and the magnetic bracket is used to absorb the magnetic component of the device to be charged so as to position the device to be charged.

18. The vehicle-mounted charging bracket according to claim 15, characterized in that: The vehicle-mounted charging bracket further includes a micro switch, which is disposed in and connected to the housing, and the supporting portion includes an abutting protrusion located in the housing, and the supporting portion is configured such that when the supporting portion is displaced downward to the lowest point relative to the bearing portion due to the gravity of the device to be charged, the abutting protrusion presses and closes the micro switch, and when the supporting portion does not support the device to be charged, the abutting protrusion is separated from the micro switch; The vehicle-mounted charging bracket also includes a first circuit board, which is electrically connected to the charging coil and the micro switch. When the micro switch is pressed and closed by the abutment protrusion, the first circuit board generates a signal indicating the start of charging. When the micro switch is separated from the abutment protrusion, the first circuit board generates a signal indicating the end of charging.

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