A wireless charging device

Abstract

This application provides a wireless charging device for efficiently charging smart glasses of various sizes. The wireless charging device includes a base, a circuit board, a first transmitting coil, and a second transmitting coil. The base has a support surface for supporting the smart glasses. The support surface is provided with a first limiting block and a second limiting block for clamping the smart glasses. The first and second limiting blocks are spaced apart along a first direction, and the first limiting block is slidably mounted on the support surface along the first direction. The circuit board is disposed within the base. The first transmitting coil is disposed within the first limiting block and electrically connected to the circuit board. The second transmitting coil is disposed within the second limiting block and electrically connected to the circuit board.

Description

Technical Field

[0001] This application relates to the field of wireless charging technology, and more particularly to a wireless charging device. Background Technology

[0002] In wireless charging technology, electronic devices do not require a power cable connection to the charging device. Simply placing the electronic device on the wireless charging device allows it to charge, offering user convenience. Furthermore, the absence of power cord contacts on the electronic device improves its safety and enhances its waterproof and dustproof performance. Therefore, wireless charging technology has become widely used in charging devices for various types of electronic devices in recent years.

[0003] Taking smart glasses as an example, due to differences in head shape, smart glasses have become increasingly diverse in size and specifications to meet the needs of different users. When wireless charging devices charge different models of smart glasses, the placement of the glasses on the device also varies. This causes changes in the relative distance between the transmitting antenna of the wireless charging device and the receiving antenna of the smart glasses, thus affecting wireless charging efficiency. Therefore, existing wireless charging devices cannot simultaneously meet the efficient charging needs of different smart glasses models. However, configuring different wireless charging devices for different smart glasses models would increase the development and maintenance complexity of wireless charging devices and significantly increase costs. Summary of the Invention

[0004] This application provides a wireless charging device that can efficiently charge smart glasses of various sizes.

[0005] In a first aspect, this application provides a wireless charging device for charging smart glasses. The wireless charging device may include a base, a circuit board, a first transmitting coil, and a second transmitting coil. The base has a support surface for supporting the smart glasses. A first limiting block and a second limiting block are disposed on the support surface, spaced apart along a first direction. The smart glasses can be held between the first and second limiting blocks. Specifically, the first limiting block can be slidably mounted on the support surface along the first direction, thus adjusting the distance between the first and second limiting blocks to adapt to the width of the smart glasses. The first transmitting coil is disposed on the first limiting block, and the second transmitting coil is disposed on the second limiting block. The first and second transmitting coils are electrically connected to the circuit board disposed within the base.

[0006] In the above scheme, the first transmitting coil can slide synchronously with the sliding of the first limiting block. That is, the position of the first transmitting coil can also be adjusted according to the size of the smart glasses, so as to ensure that the first transmitting coil can maintain efficient power transmission with different smart glasses, enabling the wireless charging device to match smart glasses of various sizes and achieve high-efficiency charging of smart glasses of various sizes.

[0007] In some possible implementations, the second limiting block can also be slidably mounted on the bearing surface along the first direction. The sliding positions of the first and second limiting blocks can be adjusted together to adjust the distance between them. This design helps to increase the adjustment range of the distance between the first and second limiting blocks, enabling the wireless charging device to match smart glasses of more sizes.

[0008] In some possible implementations, the wireless charging device may further include an elastic element that is elastically positioned between a first limiting block and a second limiting block. When the distance between the first and second limiting blocks is at its minimum, the elastic element is in a released state; when the first and second limiting blocks slide away from each other, increasing the distance between them, the elastic element is in a stretched, stored state. In this state, the elastic element applies a force to the first limiting block in the direction of the second limiting block, and simultaneously applies a force to the second limiting block in the direction of the first limiting block, enabling the first and second limiting blocks to reliably hold the smart glasses.

[0009] The elastic element can be any of springs, rubber, or plastic, and this application does not impose any restrictions on it.

[0010] In some other possible implementations, the base may include a first sidewall and a second sidewall, which are disposed opposite to each other along a first direction. The wireless charging device may also include a first elastic element and a second elastic element, wherein the first elastic element is elastically limited between the first limiting block and the first sidewall, and the second elastic element is elastically limited between the second limiting block and the second sidewall. When the distance between the first and second limiting blocks is at its minimum, the first and second elastic elements are in a released state; when the first and second limiting blocks slide away from each other, increasing the distance between them, the first and second elastic elements are in a compressed, stored state. In this state, the first elastic element applies a force to the first limiting block in the direction towards the second limiting block, and the second elastic element applies a force to the second limiting block in the direction towards the first limiting block, enabling the first and second limiting blocks to reliably hold the smart glasses.

[0011] The first elastic element and the second elastic element can be any one of spring, rubber or plastic, and this application does not limit them.

[0012] In some possible implementations, the base has a first slot and a second slot, which are respectively arranged along a first direction. Specifically, a first limiting block is slidably mounted in the first slot. The first limiting block includes a first limiting portion and a first extension portion. The first limiting portion protrudes from the bearing surface, and the first extension portion is connected to the first limiting portion and disposed inside the base. In this case, the first extension portion slides within the first slot, which provides guidance for the sliding of the first limiting block, improving the reliability of its movement. A second limiting block is slidably mounted in the second slot. The second limiting block includes a second limiting portion and a second extension portion. The second limiting portion protrudes from the bearing surface, and the second extension portion is connected to the second limiting portion and disposed inside the base. In this case, the second extension portion slides within the second slot, which provides guidance for the sliding of the second limiting block, improving the reliability of its movement.

[0013] In some possible implementations, the first transmitting coil may be disposed inside the base, and at least part of the projection of the first transmitting coil on the bearing surface is located on the side of the first limiting portion near the second limiting portion. In this way, after the smart glasses are fixed between the first limiting block and the second limiting block, the first transmitting coil and the receiving coil in one side of the temple of the smart glasses are approximately directly opposite each other in a direction perpendicular to the bearing surface. This can reduce the distance between the first transmitting coil and the receiving coil in the length direction of the wireless charging device, thereby improving the charging efficiency.

[0014] In a specific configuration, a first protruding end may be provided on the side of the first extension near the second limiting block, and the first transmitting coil may be located inside the first protruding end. Alternatively, the first transmitting coil may also be provided on the outside of the first extension; for example, the first transmitting coil may be fixed on the side of the first extension near the second limiting block.

[0015] Similarly, the second transmitting coil can be disposed inside the base. At least part of the projection of the second transmitting coil on the bearing surface is located on the side of the second limiting part near the first limiting part. In this way, after the smart glasses are fixed between the first limiting block and the second limiting block, the second transmitting coil and the receiving coil in the other temple of the smart glasses are approximately opposite each other in the direction perpendicular to the bearing surface. This can reduce the distance between the second transmitting coil and the receiving coil in the length direction of the wireless charging device, thereby improving the charging efficiency.

[0016] In a specific configuration, a second protruding end may be provided on the side of the second extension near the first limiting block, and the second transmitting coil may be located inside the second protruding end. Alternatively, the second transmitting coil may also be provided on the outside of the second extension; for example, the second transmitting coil may be fixed on the side of the second extension near the first limiting block.

[0017] In some other possible implementations, the first transmitting coil can also be disposed within the first limiting portion. In this case, the wires led out from the circuit board can extend into the first limiting portion from the first extension portion and connect to the first transmitting coil. This arrangement helps to reduce the distance between the first transmitting coil and the receiving coil corresponding to the smart glasses in the direction perpendicular to the bearing surface, thereby also improving charging efficiency.

[0018] Similarly, the second transmitting coil can also be disposed within the second limiting part. In this case, the wires led out from the circuit board can extend into the second limiting part from the second extension part and connect with the second transmitting coil. This arrangement helps to reduce the distance between the second transmitting coil and the receiving coil corresponding to the smart glasses in the direction perpendicular to the bearing surface, thereby also improving the charging efficiency.

[0019] In some possible implementations, the first limiting portion may include a first part and a second part sequentially moving away from the bearing surface, wherein the side of the first part facing the second limiting block is a vertical surface, and the side of the second part facing the second limiting block is inclined in a direction away from the second limiting block; the second limiting portion may include a third part and a fourth part sequentially moving away from the bearing surface, wherein the side of the third part facing the first limiting block is a vertical surface, and the side of the fourth part facing the first limiting block is inclined in a direction away from the first limiting block. With this configuration, utilizing the abutment between the two ends of the smart glasses and the inclined surfaces of the second and fourth parts, the smart glasses can be clamped between the first and third parts simply by pressing down, thus eliminating the need for the user to manually adjust the positions of the first and second limiting blocks, improving the ease of use of the wireless charging device.

[0020] Furthermore, the vertical surface of the first part can also have a first groove, which is perpendicular to the bearing surface; the vertical surface of the second part can also have a second groove, which is also perpendicular to the bearing surface, and the second groove is opposite to the first groove. When the smart glasses are pressed between the first and third parts, the two ends of the smart glasses can be aligned with the first and second grooves respectively, so that the two ends of the smart glasses can be locked in the first and second grooves respectively, preventing the smart glasses from moving along the width direction of the wireless charging device and improving the positioning effect of the smart glasses on the base.

[0021] In some possible implementations, the wireless charging device may further include a first magnet, a second magnet, a first Hall sensor, and a second Hall sensor. The first magnet is disposed on a first limiting block, and the first Hall sensor is disposed inside the base near the first sidewall and electrically connected to the circuit board. The first Hall sensor can be used to detect the magnetic field strength of the first magnet, thereby determining the position of the first limiting block based on the output signal of the first Hall sensor. The second magnet is disposed on a second limiting block, and the second Hall sensor is disposed inside the base near the second sidewall and electrically connected to the circuit board. The second Hall sensor can be used to detect the magnetic field strength of the second magnet, thereby determining the position of the second limiting block based on the output signal of the second Hall sensor.

[0022] In some possible implementations, the wireless charging device may further include a first flexible circuit board and a second flexible circuit board. A first Hall sensor is disposed on the first flexible circuit board and electrically connected to the circuit board through the first flexible circuit board; a second Hall sensor is disposed on the second flexible circuit board and electrically connected to the circuit board through the second flexible circuit board.

[0023] For example, there can be multiple first Hall sensors, which can be equally spaced along a first direction on a first flexible circuit board. During the sliding of the first limiting block along the first direction, the multiple first Hall sensors can be used to detect the first magnet of the first limiting block at different positions, thereby improving the position detection accuracy of the first limiting block.

[0024] Similarly, there can be multiple second Hall sensors, which can be equally spaced along the first direction on the second flexible circuit board. During the sliding of the second limiting block along the first direction, the multiple second Hall sensors can be used to detect the second magnets of the second limiting block at different positions, thereby improving the position detection accuracy of the second limiting block.

[0025] In some possible implementations, the circuit board may include a main chip and a power supply circuit. The power supply circuit is electrically connected to both the first and second transmitting coils. The main chip is electrically connected to the first and second Hall sensors and the power supply circuit, respectively, to determine whether the smart glasses are in place based on the detection information from the first and second Hall sensors. When the smart glasses are in place, the power supply circuit is controlled to supply power to the first and second transmitting coils; when the smart glasses are not in place, the power supply circuit is controlled to stop supplying power to the first and second transmitting coils. In other words, the wireless charging device can automatically adjust its operating state according to the presence of the smart glasses, thereby improving the low-power operation and reliability of the wireless charging device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the wireless charging system provided in the embodiments of this application;

[0027] Figure 2 for Figure 1 A schematic diagram of the circuit structure of a wireless charging device in the image;

[0028] Figure 3 for Figure 1 A schematic diagram of a partial circuit structure of an electronic device in a computer.

[0029] Figure 4 This is a schematic diagram of the structure of the wireless charging device provided in the embodiments of this application;

[0030] Figure 5 This is a partial structural diagram of a wireless charging device provided in an embodiment of this application;

[0031] Figure 6 for Figure 5 The diagram shows the usage status of the wireless charging device.

[0032] Figure 7 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application;

[0033] Figure 8 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application;

[0034] Figure 9 for Figure 8 The diagram shows the usage status of the wireless charging device.

[0035] Figure 10 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application;

[0036] Figure 11 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application;

[0037] Figure 12 for Figure 11 The diagram shows the usage status of the wireless charging device.

[0038] Figure 13 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application;

[0039] Figure 14 This is a schematic diagram of the control circuit structure of a wireless charging device provided in an embodiment of this application.

[0040] Figure label:

[0041] 100 - Wireless charging device; 200 - Electronic device, smart glasses; 101 - Power supply circuit; 102 - Transmitting coil;

[0042] 103 - DC power supply; 1011 - DC / AC conversion module; 1012 - First matching circuit; 201 - Power receiving circuit;

[0043] 202, 202a, 202b - Receiving coils; 203 - Battery; 2011 - Second matching circuit; 2012 - AC / DC conversion module;

[0044] 210 - Eyeglasses body; 220 - Temples; 110 - Base; 120 - Connector; 130 - Cable; 121 - Body;

[0045] 122-Connector interface; 10-Circuit board; 11-Power module; 102a-First transmitting coil; 102b-Second transmitting coil;

[0046] 20a - First limiting block; 20b - Second limiting block; 111 - Bearing surface; 220a - Left temple; 220b - Right temple;

[0047] 112-First guide rail; 113-First slot; 21a-First limiting part; 22a-First extension part; 23a-Connecting arm;

[0048] 24a - Receiving groove; 25a - Positioning protrusion; 221a - First protruding end; 114 - Second guide rail; 115 - Second slot;

[0049] 21b - Second limiting part; 22b - Second extension part; 221b - Second protruding end 221b; 211a - First part;

[0050] 212a - Second part; 213a, 213b - Inclined surfaces; 211b - Third part; 212b - Fourth part; 214a - First groove;

[0051] 214b - Second groove; 30, 30a, 30b - Elastic element; 40a, 40b - Connecting rod; 51 - First magnet; 52 - Second magnet;

[0052] 61-First Hall sensor; 62-Second Hall sensor; 116-First sidewall; 117-Second sidewall;

[0053] 71-First flexible circuit board; 72-Second flexible circuit board; 12-Main chip; 13-AND gate; 14-OR gate; 15-Analog switch;

[0054] 16-Delay switch. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings. First, the application scenarios of the wireless charging device provided in the embodiments of this application will be introduced.

[0056] With the development of science and technology, wireless charging technology is being used more and more widely in consumer electronics. Compared with traditional cable-plugged power transfer technology, wireless charging is safer, more convenient, and more reliable because there is no cable connection between the power source and the load during wireless power transfer. Wireless charging technology uses various methods to achieve wireless power transfer, including electromagnetic radiation, electromagnetic induction, electromagnetic resonance, and electric field coupling. Considering efficiency and safety, most wireless charging products on the market currently use electromagnetic induction as the primary method of wireless power transfer.

[0057] refer to Figure 1 As shown, Figure 1 This invention relates to a wireless charging system comprising an electromagnetic induction-based wireless charging device and an electronic device. In this system, the wireless charging device 100 acts as a power supply, and the electronic device 200 acts as a power receiving device. The wireless charging device 100 can be connected to a power source to transmit energy from the power source to the electronic device 200 to be charged via electromagnetic waves. The electronic device 200 contacts the wireless charging device 100 to receive the electromagnetic waves transmitted by the device and charges itself using the energy carried by those waves. The wireless charging device 100 includes, but is not limited to, charging cases, charging tablets, etc., and the electronic device 200 includes, but is not limited to, low-power wearable devices such as smart glasses, smart bracelets, watches, rings, or earphones. Figure 1 The wireless charging device 100 and electronic device 200 shown are illustrated using charging tablets and smart glasses as examples, respectively. Specifically, the smart glasses can be augmented reality (AR) glasses or virtual reality (VR) glasses, etc.

[0058] refer to Figure 2 , Figure 2 for Figure 1The diagram shows the circuit structure of a wireless charging device. The wireless charging device 100 includes a power supply circuit 101 and a transmitting coil 102. The power supply circuit 101 may include a DC / AC conversion module 1011 and a first matching circuit 1012. When charging the receiving electronic device 200, the DC / AC conversion module 1011 is connected to a power supply 103 via an adapter, or to a battery inside the wireless charging device 100, to convert a DC voltage signal into an AC voltage signal. The AC voltage signal is transmitted to the transmitting coil 102 through the first matching circuit 1012, and finally, the transmitting coil 102 converts the electrical energy of the AC voltage signal into electromagnetic waves and transmits them. The first matching circuit 1012 can adjust the resonant frequency of the power supply circuit 101 to improve the electromagnetic wave transmission efficiency of the transmitting coil 102.

[0059] refer to Figure 3 , Figure 3 for Figure 1 A schematic diagram of a partial circuit structure of an electronic device is shown. The circuit structure of the electronic device includes a power receiving circuit 201, a receiving coil 202, and a battery 203. The power receiving circuit 201 may include a second matching circuit 2011 and an AC / DC conversion module 2012. When the electronic device 200 is charging, the receiving coil 202 converts the received electromagnetic waves into an AC voltage signal. This AC voltage signal is transmitted to the AC / DC conversion module 2012 through the second matching circuit 2011. Finally, the AC / DC conversion module 2012 converts the AC voltage signal into a DC voltage signal and transmits it to the battery 203 for storage. The battery 203 can power the load of the electronic device 200 during normal use. The second matching circuit 2011 can be used to adjust the resonant frequency of the power receiving circuit 201 to improve the electromagnetic wave reception efficiency of the receiving coil 202.

[0060] Taking electronic device 200 as an example of smart glasses, it should be noted that the designation of smart glasses in the following text is the same as that of electronic device 200. Please refer to both. Figure 1 , Figure 2 and Figure 3As shown, the smart glasses 200 includes a main body 210 and two temples 220. The main body 210 is used to carry the AR or VR display components added to the smart glasses 200 compared to ordinary glasses, so that the smart glasses 200 can be used in different human-computer interaction scenarios. The two temples 220 are respectively hinged to both sides of the main body 210. When the ends of the two temples 220 are rotated away from the main body 210, the smart glasses 200 can be opened, which makes it convenient for the user to wear and use. When the ends of the two temples 220 are rotated towards the main body 210, the two temples 220 can be folded crosswise on one side of the main body 210, which makes it convenient to store the smart glasses 200 or charge the smart glasses 200.

[0061] The receiving coil 202 of the smart glasses 200 is generally located inside the temple 220, for example in... Figure 1 In the illustrated embodiment, the receiving coil 202 can be specifically positioned near the end of the temple 220 that is hinged to the main body 210 of the glasses. Specifically, the receiving coil 202 can be located within one of the temples 220, such as the left or right temple; alternatively, the receiving coil 202 can be located within both temples 220. This improves wireless charging efficiency and helps ensure the weight balance of the left and right temples 220, enhancing user comfort. It should be noted that for smart glasses 200 with receiving coils 202 on each of the left and right temples 220, the wireless charging device 100 can also include transmitting coils 102 corresponding to the two receiving coils 202, with each transmitting coil 102 transmitting wireless power to its corresponding receiving coil 202.

[0062] Wireless charging efficiency is highly sensitive to the relative positions of the transmitting coil 102 and the receiving coil 202. Charging efficiency can only be maintained within a reasonable range when the distance between them meets certain conditions. For example, if we define the length direction of the wireless charging device 100 as the x-axis, the width direction as the y-axis, and the thickness direction as the z-axis, then, for instance, in the x-axis direction, the distance between the transmitting coil 102 and the corresponding receiving coil 202 should be within ±10mm; in the y-axis direction, the distance should be within ±5mm; and in the z-axis direction, the distance should be within 3mm to 5mm.

[0063] Because users have different head shapes, the specifications and sizes of smart glasses 200 are becoming increasingly diversified to meet the wearing comfort needs of different users. For example, smart glasses 200 with different widths of the main body 210 and different lengths of the temples 220 can fit users with different head shapes. Understandably, the relative positions of the internal receiving coils 202 will also differ depending on the specifications and sizes of the smart glasses 200. In particular, for smart glasses 200 with receiving coils 202 on both the left and right temples 220, the spacing between the receiving coils 202 on both sides will change significantly depending on the width of the main body 210.

[0064] In the prior art, because the position of the transmitting coil 102 within the wireless charging device 100 is relatively fixed, when the wireless charging device 100 is charging different models of smart glasses 200, the placement position and coverage area of ​​the smart glasses 200 on the wireless charging device 100 will vary. This causes the relative distance between the transmitting coil 102 and the receiving coil 202 to change, thus affecting the charging efficiency. In other words, the existing wireless charging device 100 cannot simultaneously guarantee the charging efficiency for different models of smart glasses 200.

[0065] To address the aforementioned issues, current solutions involve configuring matching wireless charging devices for different models of smart glasses. While this approach ensures charging efficiency, it also increases the development and maintenance complexity of the wireless charging devices and significantly raises costs. Therefore, this application provides a wireless charging device that adjusts the position of the transmitting coil according to the size of the smart glasses, enabling it to match various sizes of smart glasses and achieve high-efficiency charging. Here, "matching" can be understood as ensuring that the distance between the transmitting coil of the wireless charging device and the receiving coil of the smart glasses meets the aforementioned xyz three-axis dimensional range. The wireless charging device provided in this application will be described in detail below with reference to the accompanying drawings.

[0066] refer to Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of a wireless charging device provided in an embodiment of this application. The wireless charging device 100 can be a charging case or a charging tablet, and this application does not limit it in this way. Figure 4 The illustrated embodiment uses a charging tablet as an example of a wireless charging device.

[0067] Continue to refer to Figure 4The wireless charging device 100 includes a base 110, on which an interface (not shown) may be provided. This interface can be electrically connected to a connector 120 via a cable 130. The connector 120 can be connected to a power source to transmit electrical energy to the base 110. The base 110 can be used to support the electronic device to be charged and to realize electromagnetic coupling between the wireless charging device 100 and the electronic device, thereby realizing the charging function of the wireless charging device 100 for the electronic device.

[0068] In this embodiment, the connector 120 may be, but is not limited to, a Micro USB connector, a Type-A connector, or a Type-C connector. The connector 120 includes a body 121 and a connector interface 122, which may be partially or entirely disposed within the body 121. For example, in... Figure 4 In the illustrated embodiment, the connector interface 122 is partially disposed within the main body 121. Alternatively, the connector interface 122 can be directly plugged into the power interface, or connected to the power interface via an adapter, to convert the AC voltage signal from the mains network into a DC voltage signal before transmitting it to the base 110.

[0069] refer to Figure 5 As shown, Figure 5 This is a partial structural diagram of a wireless charging device provided in an embodiment of this application. The wireless charging device 100 provided in this embodiment serves as a power supply device and may further include a circuit board 10 and a transmitting coil 102. The circuit board 10 is disposed inside the base 110, and a power module 11 and a power supply circuit (not shown in the figure) are disposed on the circuit board 10. The power module 11 is connected to a power source via cables and connectors. The DC / AC conversion module of the power supply circuit can be integrated into the power module, or it can be set independently and then connected to the power module 11. The first matching circuit of the power supply circuit is connected to the transmitting coil 102, thereby converting the DC voltage signal input to the base 110 into an AC voltage signal before transmitting it to the transmitting coil 102. The first matching circuit and the transmitting coil 102 can be connected by wires or by a flexible circuit board; this application does not impose any limitations on this. It should be noted that... Figure 5 The accompanying drawings below only schematically illustrate some components included in the wireless charging device 100. The actual shape, size, location, and construction of these components are not subject to change. Figure 5 As well as the limitations of the accompanying figures below.

[0070] In some possible implementations, the wireless charging device 100 may further include a battery (not shown in the figure), which may also be connected to a power source via a cable and a connector to receive and store electrical energy transmitted to the base 110 by the connector. The power module 11, in addition to being directly connected to a power source, may also be connected to the battery, thereby enabling the battery to supply power to the transmitting coil 102. Thus, when the wireless charging device 100 is not connected to a power source, the electrical energy stored in the battery can still be used to charge the smart glasses. In other words, the wireless charging device 100 provided in this application embodiment can also be used as a power bank, thereby broadening the application scenarios of the wireless charging device and improving its ease of use. It should be understood that when the wireless charging device 100 is connected to a power source, when charging the smart glasses, the electrical energy transmitted to the base 110 via the connector and cable may bypass the battery and be directly processed by the power supply circuit before being transmitted to the transmitting coil 102.

[0071] In this embodiment, there can be two transmitting coils 102. The two transmitting coils 102 are respectively set to two receiving coils in the left temple and right temple of the smart glasses. Each transmitting coil 102 and its corresponding receiving coil transmit wireless power through electromagnetic induction. For ease of description, the two transmitting coils 102 will be referred to as the first transmitting coil 102a and the second transmitting coil 102b.

[0072] Continue to refer to Figure 5 The base 110 is also provided with limiting blocks corresponding to the two transmitting coils 102, namely a first limiting block 20a and a second limiting block 20b. In specific implementation, the first transmitting coil 102a can be disposed on the first limiting block 20a, and the second transmitting coil 102b can be disposed on the second limiting block 20b. The first limiting block 20a and the second limiting block 20b are disposed on the side of the base 110 used to support the electronic device, that is, on the bearing surface 111 of the base 110. In some embodiments, the first limiting block 20a and the second limiting block 20b can be arranged along a first direction on the bearing surface 111. Taking the length direction of the wireless charging device as the x-axis, the width direction as the y-axis, and the thickness direction as the z-axis, this first direction can be either the x-axis direction or the y-axis direction. Figure 5 The illustrated embodiment is given with the x-axis as the first direction.

[0073] Figure 6 for Figure 5 The diagram shows the usage status of the wireless charging device. Please refer to it as well. Figure 5 and Figure 6As shown, when the smart glasses 200 is charged using the wireless charging device 100, the smart glasses 200 is clamped between the first limiting block 20a and the second limiting block 20b. The two ends of the smart glasses 200 along the width direction (that is, the arrangement direction of the two temples 220a and 220b on the glasses body 210) respectively abut against the first limiting block 20a and the second limiting block 20b. That is, on the bearing surface 111 of the base 110, the width of the smart glasses 200 is set along the first direction.

[0074] After the smart glasses 200 are fixed between the first limiting block 20a and the second limiting block 20b, the end of the left temple 220a that is hinged to the main body of the glasses 210 is positioned close to the first limiting block 20a, and the end of the right temple 220b that is hinged to the main body of the glasses is positioned close to the second limiting block 20b. In this way, the first transmitting coil 102a can induce and transmit electrical energy to the receiving coil 202a in the left temple 220a, and the second transmitting coil 102b can induce and transmit electrical energy to the receiving coil 202b in the right temple 220b, thereby charging the smart glasses 200. It should be noted that the directional terms such as "left" and "right" used in the embodiments of this application are mainly based on the smart glasses' position on the attached... Figure 6 The description of the display orientation does not constitute a limitation on the orientation of smart glasses in actual application scenarios.

[0075] In some embodiments, the bearing surface 111 of the base 110 is provided with a first guide rail 112 arranged along a first direction, and a first limiting block 20a is slidably mounted on the first guide rail 112. This allows the sliding position of the first limiting block 20a on the first guide rail 112 to be adjusted according to the width of the smart glasses 200, thereby adjusting the distance between the first limiting block 20a and the second limiting block 20b to adapt to the width of the smart glasses 200. Since the first transmitting coil 102a is disposed on the first limiting block 20a, the sliding of the first limiting block 20a can drive the first transmitting coil 102a to slide synchronously. That is, the position of the first transmitting coil 102a can also be adjusted according to the specifications and dimensions of the smart glasses 200. In this way, when charging smart glasses 200 of different sizes, even if the placement and coverage of the smart glasses 200 on the base 110 are different, the position of the first transmitting coil 102a can be adjusted according to the smart glasses 200. Therefore, the relative distance between the first transmitting coil 102a and the receiving coil 202a in the left temple 220a of these smart glasses 200 is basically the same. This ensures that the first transmitting coil 102a and different smart glasses 200 can maintain efficient power transmission, enabling the wireless charging device 100 to match smart glasses 200 of various sizes.

[0076] As the first transmitting coil 102a slides along with the first limiting block 20a, the relative distance between it and the circuit board 10 changes. To facilitate the connection of the first transmitting coil 102a to the first matching circuit on the circuit board 10, in some embodiments, the bearing surface 111 of the base 110 has a first slot 113 arranged along a first direction. The first limiting block 20a may include a first limiting portion 21a and a first extension portion 22a. The first limiting portion 21a protrudes from the bearing surface 111 of the base 110, while the first extension portion 22a is disposed inside the base 110 through the first slot 113. Specifically, the first transmitting coil 102a may be disposed within the first extension portion 22a, and a wire led from the first matching circuit may extend into the first extension portion 22a and connect to the first transmitting coil 102a. When the first limiting block 20a slides along the first direction, the first extension 22a slides within the first slot 113. At this time, the first slot 113 can be formed as a first guide rail, thereby providing guidance for the sliding of the first limiting block 20a and improving the reliability of the movement of the first limiting block 20a.

[0077] In some possible implementations, the first limiting block 20a may also include a connecting arm 23a, and the first limiting part 21a has a receiving groove 24a on one side in the direction perpendicular to the y-axis. The connecting arm 23a is rotatably connected to the first limiting part 21a. The connecting arm 23a can be received in the receiving groove 24a, and can also extend out of the receiving groove 24a away from the first limiting part 21a during rotation. A plurality of positioning protrusions 25a arranged along the first direction may be provided on the bearing surface 111 of the base 110. During the sliding of the first limiting block 20a along the first direction, the connecting arm 23a can be accommodated in the receiving groove 24a; when the first limiting block 20a slides to a position where the distance between it and the second limiting block 20b is adapted to the width of the smart glasses, the connecting arm 23a can be extended from the receiving groove 24a and locked between two adjacent positioning protrusions 25a to fix the first limiting block 20a in that position, thereby improving the structural reliability of the wireless charging device 100.

[0078] In some other possible embodiments, the first extension may have an arc-shaped protrusion on its side in the direction perpendicular to the y-axis, and the inner wall of the first slot may have a plurality of positioning grooves arranged along the first direction. During the sliding of the first limiting block along the first direction, the arc-shaped protrusion can be fitted into each positioning groove to fix the first limiting block in different positions. When it is necessary to change the position of the first limiting block, the user can push the first limiting block to slide the arc-shaped protrusion out of the current positioning groove. It is understood that in some other possible embodiments, the first extension may also have a positioning groove on its side in the direction perpendicular to the y-axis. In this case, the inner wall of the first slot may have a plurality of arc-shaped protrusions arranged along the first direction. Using this arrangement, the cooperation between the arc-shaped protrusions and the positioning grooves can also be used to fix the first limiting block in different positions.

[0079] Continue to refer to Figure 5 and Figure 6 In this embodiment, the first transmitting coil 102a may be located inside the base 110. At least a portion of the projection of the first transmitting coil 102a onto the bearing surface 111 is located on the side of the first limiting portion 21a near the second limiting block 20b. Thus, after the smart glasses 200 are fixed between the first limiting block 20a and the second limiting block 20b, along the z-axis direction, the first transmitting coil 102a and the receiving coil 202a inside the left temple 220a are approximately directly opposite each other, thereby reducing the distance between the first transmitting coil 102a and the receiving coil 202a in the x-axis direction and improving charging efficiency. In one embodiment, along the first direction, the first extension 22a has a first protruding end 221a on the side near the second limiting block 20b, and the first protruding end 221a extends beyond the first limiting portion 21a. The first transmitting coil 102a may specifically be located within the first protruding end 221a. In another embodiment, the first transmitting coil 102a may also be disposed on the outside of the first extension 22a. For example, the first transmitting coil 102a may be fixed on the side of the first extension 22a near the second limiting block 20b.

[0080] Figure 7 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application. (Reference) Figure 7 As shown, in some embodiments, the first transmitting coil 102a can also be disposed within the first limiting portion 21a. In this case, the wire led out from the first matching circuit can extend into the first limiting portion 21a from the first extension portion 22a and connect with the first transmitting coil 102a. This arrangement helps to reduce the distance between the first transmitting coil 102a and the receiving coil 202a in the z-axis direction, thereby also improving the charging efficiency.

[0081] In addition, the width of the first extension 22a in the y-axis direction can be smaller than the width of the first limiting part 21a in the y-axis direction, which can correspondingly reduce the width of the first slot 113, thereby improving the appearance quality of the wireless charging device 100.

[0082] Please refer to the above. Figure 8 and Figure 9 As shown, Figure 8 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application. Figure 9 for Figure 8 The diagram shows the usage state of the wireless charging device. In this embodiment, the bearing surface 111 of the base 110 may also be provided with a second guide rail 114 arranged along the first direction. The second limiting block 20b is slidably mounted on the second guide rail 114. At this time, the sliding positions of the first limiting block 20a and the second limiting block 20b can be adjusted at the same time to adjust the distance between them. This design is beneficial to increase the adjustment range of the distance between the first limiting block 20a and the second limiting block 20b, so that the wireless charging device 100 can match smart glasses 200 of more specifications and sizes.

[0083] Similarly, to facilitate the connection between the second transmitting coil 102b and the first matching circuit on the circuit board 10, in some embodiments, the bearing surface 111 of the base 110 has a second slot 115 arranged along the first direction. The second limiting block 20b may include a second limiting portion 21b protruding from the bearing surface 111 of the base 110, and a second extension portion 22b disposed inside the base 110 through the second slot 115. The second transmitting coil 102b may be disposed within the second extension portion 22b, and a wire led out from the first matching circuit may extend into the second extension portion 22b and connect to the second transmitting coil 102b. In this embodiment, when the second limiting block 20b slides along the first direction, the second extension portion 22b slides within the second slot 115. At this time, the second slot 115 can be formed as a second guide rail 114, thereby providing guidance for the sliding of the second limiting block 20b and improving the movement reliability of the second limiting block 20b.

[0084] In some possible implementations, a connecting arm rotatably connected to the second limiting block 20b can also be provided. Correspondingly, the bearing surface 111 of the base 110 can be provided with a positioning protrusion corresponding to the connecting arm. The positioning of the second limiting block can be achieved through the cooperation of the connecting arm and its corresponding positioning protrusion. In other possible implementations, an arc-shaped protrusion can be provided on the side of the second extension in the direction perpendicular to the y-axis, and a plurality of positioning grooves arranged along the first direction can be provided on the inner wall of the second slot; or, a positioning groove can be provided on the side of the second extension in the direction perpendicular to the y-axis, and a plurality of arc-shaped protrusions arranged along the first direction can be provided on the inner wall of the second slot. In this way, the second limiting block can also be fixed at different positions by utilizing the cooperation between the arc-shaped protrusions and the positioning grooves.

[0085] In this embodiment, the second extension 22b may be located inside the base 110. At least a portion of the projection of the second transmitting coil 102b onto the bearing surface 111 is located on the side of the second limiting portion 21b near the first limiting block 20a. Thus, after the smart glasses 200 are fixed between the first limiting block 20a and the second limiting block 20b, along the z-axis, the second transmitting coil 102b and the receiving coil 202b inside the right temple 220b are approximately directly opposite each other, thereby reducing the distance between the second transmitting coil 102b and the receiving coil 202b in the x-axis direction, and thus improving wireless charging efficiency. In one embodiment, along the first direction, the side of the second extension 22b near the first limiting block 20a also has a second protruding end 221b, which extends beyond the second limiting portion 21b. The second transmitting coil 102b may specifically be located within the second protruding end 221b. In another embodiment, the second transmitting coil 102b may also be disposed on the outside of the second extension 22b. For example, the second transmitting coil 102b may be fixed on the side of the second extension 22b near the first limiting block 20a.

[0086] Figure 10 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application. (Reference) Figure 10 As shown, in some embodiments, the second transmitting coil 102b can also be disposed within the second limiting portion 21b. In this case, the wire led out from the first matching circuit can extend into the second limiting portion 21b from the second extension portion 22b and connect with the second transmitting coil 102b. This arrangement helps to reduce the distance between the second transmitting coil 102b and the receiving coil 202b in the z-axis direction, thereby also improving the charging efficiency.

[0087] For example, the width of the second extension 22b in the y-axis direction may be smaller than the width of the second limiting part 21b in the y-axis direction, which can correspondingly reduce the width of the second slot 115, thereby improving the appearance quality of the wireless charging device.

[0088] Continue to refer to Figure 8 and Figure 9 In this embodiment of the application, the first limiting part 21a includes a first part 211a and a second part 212a that are sequentially moved away from the bearing surface. Specifically, the first part 211a is generally a cuboid structure, and the side of the first part 211a facing the second limiting block 20b is a vertical surface perpendicular to the bearing surface 111; the second part 212a is generally a trapezoidal structure, and the side of the second part 212a facing the second limiting block 20b is an inclined surface 213a that forms a certain angle with the bearing surface 111, and along the positive z-axis direction, the inclined surface 213a is inclined in a direction away from the second limiting block 20b. Similarly, the second limiting part 21b includes a third part 211b and a fourth part 212b that are sequentially away from the bearing surface 111. Specifically, the third part 211b is roughly a cuboid structure, and the side of the third part 211b facing the first limiting block 20a is a vertical surface perpendicular to the bearing surface 111; the fourth part 212b is roughly a trapezoidal structure, and the side of the fourth part 212b facing the first limiting block 20a is an inclined surface 213b that forms a certain angle with the bearing surface 111, and along the positive z-axis, this inclined surface 213b is inclined in a direction away from the first limiting block 20a.

[0089] In the above scheme, when charging the smart glasses 200, the user can first place the smart glasses 200 between the second part 212a and the fourth part 212b. Based on the inclined surface features of the second part 212a and the fourth part 212b, the two ends of the smart glasses 200 can respectively contact the inclined surface 213a of the second part 212a and the inclined surface 213b of the fourth part 212b. At this time, the user presses the smart glasses 200 downward (i.e., in the negative z-axis direction), and the left end of the smart glasses 200 can apply a negative x-axis force to the second part 212a. Simultaneously, the right end of the smart glasses 200 also applies a resisting force in the positive z-axis direction to the fourth part 212b. Under the action of these two resisting forces, the first limiting block 20a and the second limiting block 20b slide in directions relatively away from each other until the distance between the first limiting block 20a and the second limiting block 20b increases to be equal to the width of the smart glasses 200. At this point, the smart glasses 200 is pressed into contact with the bearing surface 111, and the smart glasses 200 is clamped between the first part 211a and the third part 211b. Based on the vertical surface features of the first part 211a and the third part 211b, the forces applied by the first part 211a and the third part 211b to the smart glasses 200 are all in the x-axis direction. Since there is no component force in the z-axis direction, the smart glasses 200 can be more stably fixed between the first limiting block 20a and the second limiting block 20b.

[0090] Additionally, the vertical surface of the first part 211a may also have a first groove 214a arranged along the z-axis, and correspondingly, the vertical surface of the third part 211b may have a second groove 214b arranged along the z-axis, with the first groove 214a and the second groove 214b positioned opposite each other. When the smart glasses 200 are pressed between the first part 211a and the third part 211b, the two ends of the smart glasses 200 can be aligned with the first groove 214a and the second groove 214b respectively, thereby allowing the two ends of the smart glasses 200 to be respectively locked in the first groove 214a and the second groove 214b, preventing the smart glasses 200 from moving in the y-direction and improving the positioning effect of the smart glasses 200 on the base 110.

[0091] Continue to refer to Figure 8 and Figure 9 The wireless charging device 100 may also include an elastic element 30 connected between the first limiting block 20a and the second limiting block 20b. When the first limiting block 20a is located on the first guide rail 112 near the end of the second guide rail 114, and the second limiting block 20b is located on the second guide rail 114 near the end of the first guide rail 112, the elastic element 30 is in a released state. At this time, the distance between the first limiting block 20a and the second limiting block 20b is the minimum. The position of the first limiting block 20a at this time is defined as the first initial position, the position of the second limiting block 20b is defined as the second initial position, and the minimum distance between the first limiting block 20a and the second limiting block 20b is defined as the first distance. When the first limiting block 20a and the second limiting block 20b slide away from each other from their respective initial positions, such that the distance between the first limiting block 20a and the second limiting block 20b is greater than the first distance, the elastic element 30 is in a stretched energy-storing state. In this state, the elastic element 30 can apply an elastic force to the first limiting block 20a in the positive x-axis direction and to the second limiting block 20b. The elastic force in the negative x-axis direction enables the first limiting block 20a and the second limiting block 20b to reliably hold the smart glasses 200.

[0092] Among them, the type of elastic element 30 is not limited to Figure 7 and Figure 8 In some other embodiments, the elastic element 30 of the spring shown may also be made of rubber, plastic, etc.

[0093] It should be noted that the energy release state of the elastic element 30 is relative to its energy storage state. In the above embodiment, when the elastic element 30 is stretched by an external force, it can be understood as its energy storage state, and when the external force is removed, it can be understood as its energy release state.

[0094] The aforementioned first spacing can be designed according to the specifications and dimensions of the smart glasses 200. In a specific embodiment, the first spacing is not less than the width of the smallest smart glasses 200. With this design, the first limiting block 20a and the second limiting block 20b can clamp smart glasses 200 of various sizes, thereby positioning the smart glasses 200 on the base 110 and preventing the smart glasses 200 from shifting during charging, which helps to improve the charging efficiency of the smart glasses 200.

[0095] In some embodiments, the elastic member 30 may be disposed inside the base 110 and connected between the first extension 22a and the second extension 22b. The wireless charging device 100 may also include a connecting rod 40a connecting the elastic member 30 and the first extension 22a to reduce the difficulty of connecting the elastic member 30 and the first extension 22a. Similarly, the wireless charging device 100 may also include a connecting rod 40b connecting the elastic member 30 and the second extension 22b to reduce the difficulty of connecting the elastic member 30 and the second extension 22b. It is understood that in some other embodiments, the elastic member 30 may also be disposed outside the base 110, in which case the elastic member 30 may be connected between the first limiting portion 21a and the second limiting portion 21b.

[0096] It should be understood that when the first limiting block 20a is slidably assembled on the base 110 and the second limiting block 20b is fixed on the base 110, an elastic element can also be provided between the first limiting block 20a and the second limiting block 20b to fix the smart glasses 200. The setting method of the elastic element can be referred to the above description, and will not be elaborated further here.

[0097] Please refer to the above. Figure 11 and Figure 12 , Figure 11 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application. Figure 12 for Figure 11The diagram shows the usage state of the wireless charging device. In this embodiment, the wireless charging device 100 may include two elastic members 30, namely a first elastic member 30a and a second elastic member 30b. The first elastic member 30a is connected between the first extension 22a and the first side wall 116 of the base 110, and the second elastic member 30b is connected between the second extension 22b and the second side wall 117 of the base 110. When the first limiting block 20a is in the first initial position and the second limiting block 20b is in the second initial position, the first elastic element 30a and the second elastic element 30b are in the energy-releasing state, and the distance between the first limiting block 20a and the second limiting block 20b is the smallest. When the first limiting block 20a and the second limiting block 20b slide away from each other, the first elastic element 30a and the second elastic element 30b are in the compressed energy-storing state. In this state, the first elastic element 30a can apply an elastic force in the positive x-axis direction to the first limiting block 20a, and the second elastic element 30b can apply an elastic force in the negative x-axis direction to the second limiting block 20b, so that the first limiting block 20a and the second limiting block 20b can reliably clamp the smart glasses 200.

[0098] Figure 13 This is a partial structural diagram of another wireless charging device provided in an embodiment of this application. In this embodiment, the wireless charging device 100 may further include a first magnet 51, a second magnet 52, a first Hall sensor 61, and a second Hall sensor 62. The first magnet 51 is disposed on the first limiting block 20a; exemplarily, the first magnet 51 may be disposed on the first extension 22a of the first limiting block 20a. The first Hall sensor 61 is disposed within the base 110 near the first sidewall 116 and is electrically connected to the power module 11 on the circuit board 10. The first Hall sensor 61 can be used to detect the magnetic field strength of the first magnet 51. The second magnet 52 is disposed on the second limiting block 20b; exemplarily, the second magnet 52 may be disposed on the second extension 22b of the second limiting block 20b. The second Hall sensor 62 is disposed within the base 110 near the second sidewall 117 and is electrically connected to the power module 11 on the circuit board 10. The second Hall sensor 62 is used to detect the magnetic field strength of the second magnet 52.

[0099] In some embodiments, the wireless charging device 100 may further include a first flexible circuit board 71 and a second flexible circuit board 72 disposed in the base 110. The first Hall sensor 61 may be disposed on the first flexible circuit board 71 and electrically connected to the circuit board 10 through the first flexible circuit board 71. Correspondingly, the second Hall sensor 62 may be disposed on the second flexible circuit board 72 and electrically connected to the circuit board 10 through the second flexible circuit board 72.

[0100] When the first limiting block 20a is in the first initial position, the first Hall sensor 61 is relatively far from the first magnet 51, and the magnetic field strength of the first magnet 51 sensed by the first Hall sensor 61 is relatively weak. At this time, the first Hall sensor 61 outputs a low level. When the first limiting block 20a slides from the first initial position to the negative x-axis direction, the distance between the first Hall sensor 61 and the first magnet 51 decreases, and the magnetic field strength of the first magnet 51 sensed by the first Hall sensor 61 increases. At this time, the first Hall sensor 61 outputs a high level.

[0101] Similarly, when the second limit block 20b is in the second initial position, the magnetic field strength of the second magnet 52 sensed by the second Hall sensor 62 is relatively weak, and the second Hall sensor 62 outputs a low level at this time; when the second limit block 20b slides from the second initial position to the positive x-axis direction, the distance between the second Hall sensor 62 and the second magnet 52 decreases, the magnetic field strength of the second magnet 52 sensed by the second Hall sensor 62 increases, and the second Hall sensor 62 outputs a high level at this time.

[0102] For example, the number of first Hall sensors 61 can be multiple, such as two, three or more. Figure 11 The following explanation uses three first Hall sensors 61 as an example. Specifically, multiple first Hall sensors 61 can be equally spaced along a first direction on the first flexible circuit board 71. During the sliding process of the first limiting block 20a from its first initial position to the other end of the first guide rail 112, the multiple first Hall sensors 61 can be used to detect the first magnet 51 of the first limiting block 20a at different positions. Thus, as long as one of the first Hall sensors outputs a high level, it can be determined that the first limiting block 20a has left its first initial position. It can be understood that when all the first Hall sensors 61 output a low level, it can be determined that the first limiting block 20a is in its first initial position.

[0103] Similarly, there can be multiple second Hall sensors 62. These multiple second Hall sensors 62 can be equally spaced along the first direction on the second flexible circuit board 72 and used to detect the second magnet 52 of the second limiting block 20b at different positions. Therefore, as long as one of the second Hall sensors 62 outputs a high level, it can be determined that the second limiting block 20b has left the second initial position. It can be understood that when all the second Hall sensors 62 output a low level, it can be determined that the second limiting block 20b is in the second initial position.

[0104] As can be seen, in this embodiment, by utilizing the sensing of the first magnet 51 by the first Hall sensor 61 and the sensing of the second magnet 52 by the second Hall sensor 62, it is possible to determine whether the first limiting block 20a and the second limiting block 20b are in their respective initial positions, and thus determine whether the smart glasses are in place. This allows for control of the working state of the wireless charging device 100 based on whether the smart glasses are in place. The following example, using one first Hall sensor 61 and one second Hall sensor 62, illustrates the relevant control strategies of the wireless charging device 100 in several working states.

[0105] Figure 14 This is a schematic diagram of the control circuit structure of the wireless charging device provided in an embodiment of this application. (See also...) Figure 11 and Figure 12 As shown, in this embodiment, the circuit board 10 is equipped with a main chip 12, an AND gate 13, an OR gate 14, an analog switch 15, a delay switch 16, and a first diode D1 and a second diode D2. The first Hall sensor 61 and the second Hall sensor 62 are powered by the power module 11. The first Hall sensor 61 is connected to the first input terminal of the AND gate 13 and the first input terminal of the OR gate 14, respectively. The second Hall sensor 62 is connected to the second input terminal of the AND gate 13 and the second input terminal of the OR gate 14, respectively. The anode of D1 is connected to the output terminal of the AND gate 13, and the cathode of D1 is connected to the input terminal of the delay switch 16 and the system power supply 17. The anode of D2 is connected to the main chip 12, and the cathode of D2 is connected to the input terminal of the delay switch 16 and the system power supply 17. The input terminal of the analog switch 15 is connected to the output terminal of the OR gate 14, the output terminal of the analog switch 15 is connected to the main chip 12 via GPIO, and the control terminal of the analog switch 15 is connected to the output terminal of the delay switch 16.

[0106] With the wireless charging device 100 powered off, the smart glasses are placed between the first limiting block 20a and the second limiting block 20b. The first limiting block 20a moves in the negative x-axis direction, increasing the magnetic field strength of the first magnet 51 sensed by the first Hall sensor 61, and outputting a high level. The second limiting block 20b moves in the positive x-axis direction, increasing the magnetic field strength of the second magnet 52 sensed by the second Hall sensor 62, and also outputting a high level. At this time, both inputs of AND gate 13 are at a high level, so AND gate 13 also outputs a high level, turning on D1, thereby powering on the system power supply 17, which in turn powers on the main chip 12, and the wireless charging device 100 switches to the powered-on state.

[0107] The high-level output of AND gate 13 is delayed by delay switch 16, enabling analog switch 15. At this time, the high-level output of OR gate 14 is output to GPIO through analog switch 15. After the main chip 12 detects that GPIO is high, it confirms that the smart glasses are in place and controls the power module 11 to supply power to the power supply circuit, so that the first transmitting coil 102a and the second transmitting coil 102b charge the smart glasses. It should be noted that the purpose of setting delay switch 16 is to prevent GPIO from powering on before the system power supply 17 when the wireless charging device 100 is in the off state, which would damage the main chip 12 and affect the reliability of the wireless charging device 100.

[0108] When the wireless charging device 100 is powered on and the smart glasses are not in place, the main chip 12 turns on D2, and D2 outputs a high level. At this time, the analog switch 15 is normally open. In this state, after the smart glasses are placed between the first limit block 20a and the second limit block 20b, both input terminals of the OR gate 14 are at a high level. Therefore, the OR gate 14 also outputs a high level, which changes the output of the analog switch 15 from low level to high level and outputs it to GPIO. After the main chip 12 detects that the GPIO is high level, it confirms that the smart glasses are in place and controls the power module 11 to supply power to the power supply circuit, so that the first transmitting coil 102a and the second transmitting coil 102b charge the smart glasses.

[0109] When the wireless charging device 100 is powered on and the smart glasses are in place, D2 remains on and outputs a high level. At this time, the analog switch 15 is normally open. In this state, when the smart glasses are removed from between the first limit block 20a and the second limit block 20b, the first limit block 20a moves in the positive x-axis direction under the action of the elastic element 30. The magnetic field strength of the first magnet 51 sensed by the first Hall sensor 61 weakens, and the output is low. The second limit block 20b moves in the negative x-axis direction under the action of the elastic element 30. The magnetic field strength of the second magnet 52 sensed by the second Hall sensor 61 weakens, and the output is also low. At this time, both inputs of the OR gate 14 are low, so the output of the OR gate 14 also changes from high to low. The low level output of the OR gate 14 is output to GPIO through the analog switch. After the main chip 12 detects that the GPIO is low, it confirms that the smart glasses are no longer in place and controls the power module 11 to stop supplying power to the power supply circuit. After the smart glasses are removed, the main chip can immediately control the system power supply to shut down, or it can control the system power supply to remain powered on for a set time before shutting it down. It should be noted that in some scenarios, such as when a wireless charging device is undergoing a system upgrade, the main chip will still turn on D2 after the smart glasses are removed, causing D2 to output a high level, thus keeping the system power supply 17 powered on until the upgrade is complete.

[0110] In summary, the wireless charging device provided in this application can adjust the position of the transmitting coil according to the size of the smart glasses to match smart glasses of various sizes and achieve high-efficiency charging for smart glasses of various sizes. In addition, the wireless charging device can automatically adjust its working state according to the presence of the smart glasses, which is beneficial to the low power consumption operation and reliability of the wireless charging device.

[0111] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless charging device, characterized in that, The wireless charging device includes a base, a circuit board, a first transmitting coil, and a second transmitting coil, wherein: The base has a support surface for supporting smart glasses. The support surface is provided with a first limiting block and a second limiting block for clamping the smart glasses. The first limiting block and the second limiting block are spaced apart along a first direction, and the first limiting block is slidably assembled on the support surface along the first direction. The circuit board is disposed within the base; The first transmitting coil is disposed on the first limiting block and electrically connected to the circuit board; The second transmitting coil is disposed on the second limiting block and electrically connected to the circuit board.

2. The wireless charging device as described in claim 1, characterized in that, The second limiting block is slidably assembled on the bearing surface along the first direction.

3. The wireless charging device as described in claim 2, characterized in that, The wireless charging device also includes an elastic element, which is elastically positioned between the first limiting block and the second limiting block.

4. The wireless charging device as described in claim 2, characterized in that, The base includes a first sidewall and a second sidewall, which are disposed opposite to each other along the first direction; The wireless charging device includes a first elastic element and a second elastic element. The first elastic element is elastically limited between the first limiting block and the first sidewall, and the second elastic element is elastically limited between the second limiting block and the second sidewall.

5. The wireless charging device according to any one of claims 2 to 4, characterized in that, The base is provided with a first slot and a second slot, and the first slot and the second slot are respectively arranged along the first direction; The first limiting block is slidably assembled in the first slot. The first limiting block includes a first limiting part and a first extension part. The first limiting part protrudes from the bearing surface, and the first extension part is connected to the first limiting part. The first extension part is disposed inside the base. The second limiting block is slidably assembled in the second slot. The second limiting block includes a second limiting part and a second extension part. The second limiting part protrudes from the bearing surface, and the second extension part is connected to the second limiting part and disposed inside the base.

6. The wireless charging device as described in claim 5, characterized in that, The first transmitting coil is disposed inside the base, and at least a portion of the projection of the first transmitting coil onto the bearing surface is located on the side of the first limiting portion near the second limiting portion; The second transmitting coil is disposed inside the base, and at least a portion of the projection of the second transmitting coil onto the bearing surface is located on the side of the second limiting portion near the first limiting portion.

7. The wireless charging device as described in claim 5, characterized in that, The first transmitting coil is disposed within the first limiting portion; the second transmitting coil is disposed within the second limiting portion.

8. The wireless charging device as described in claim 5, characterized in that, The first limiting part includes a first part and a second part that are sequentially moved away from the bearing surface. The side of the first part facing the second limiting block is a vertical surface, and the side of the second part facing the second limiting block is inclined in a direction away from the second limiting block. The second limiting part includes a third part and a fourth part that are sequentially away from the bearing surface. The side of the third part facing the first limiting block is a vertical surface, and the side of the fourth part facing the first limiting block is inclined in a direction away from the first limiting block.

9. The wireless charging device as described in claim 8, characterized in that, The first part has a first groove on its vertical surface, and the first groove is arranged in a direction perpendicular to the bearing surface; The vertical surface of the third part is provided with a second groove, which is arranged in a direction perpendicular to the bearing surface.

10. The wireless charging device according to any one of claims 2 to 4, characterized in that, The base includes a first sidewall and a second sidewall, which are disposed opposite to each other along the first direction; the wireless charging device further includes a first magnet, a second magnet, a first Hall sensor, and a second Hall sensor, wherein... The first magnet is disposed on the first limiting block, and the first Hall sensor is disposed inside the base near the first side wall and electrically connected to the circuit board. The first Hall sensor is used to detect the magnetic field strength of the first magnet. The second magnet is disposed on the second limiting block, and the second Hall sensor is disposed inside the base near the second sidewall and electrically connected to the circuit board. The second Hall sensor is used to detect the magnetic field strength of the second magnet.

11. The wireless charging device as described in claim 10, characterized in that, The wireless charging device also includes a first flexible circuit board and a second flexible circuit board; The first Hall sensor is disposed on the first flexible circuit board and is electrically connected to the circuit board through the first flexible circuit board; The second Hall sensor is disposed on the second flexible circuit board and is electrically connected to the circuit board through the second flexible circuit board.

12. The wireless charging device as described in claim 10, characterized in that, The circuit board is equipped with a main chip and a power supply circuit, and the power supply circuit is connected to the first transmitting coil and the second transmitting coil. The main chip is connected to the first Hall sensor, the second Hall sensor, and the power supply circuit, respectively, and is used to determine whether the smart glasses are in place based on the detection information of the first Hall sensor and the second Hall sensor; when the smart glasses are in place, the power supply circuit is controlled to supply power to the first transmitting coil and the second transmitting coil; when the smart glasses are not in place, the power supply circuit is controlled to stop supplying power to the first transmitting coil and the second transmitting coil.

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