Wearable intelligent device

Abstract

The invention relates to the technical field of intelligent watches, and relates to wearable intelligent equipment. The equipment is characterized in that an external voltage signal is divided into a first voltage signal and a second voltage signal after entering the wearable intelligent equipment, and the first voltage signal is used for charging a watch body of the wearable intelligent equipment; the wireless charging transmitting end receives the second voltage signal and is used for converting the second voltage signal into an alternating current voltage signal; and the wireless charging receiving end receives the alternating current voltage signal and converts the alternating current voltage signal into a direct current voltage signal, and the direct current voltage signal is used for charging a functional module on the wearable intelligent equipment. According to the equipment, the external voltage signal is divided into two paths, one path directly charges the meter body, and the other path charges the function module through the wireless charging transmitting end and the wireless charging receiving end, so that the function module and the meter body can be charged by one charging line, and the charging process is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of smart watches, and further to a wearable smart device. Background Art

[0002] At present, when charging wearable smart devices on the market, two independent charging cables are required: one is used to charge the body of the wearable smart device, and the other is used to charge the functional modules on the wearable smart device. This not only complicates the charging of the watch, but also affects the user experience. Summary of the invention

[0003] In order to solve the above technical problems, the present application provides a wearable smart device that simplifies the charging process and reduces the charging cost.

[0004] In a first aspect, the present application provides a wearable smart device, in which an external voltage signal is divided into a first voltage signal and a second voltage signal after entering the wearable smart device, and the first voltage signal is used to charge the body of the wearable smart device, including: a wireless charging transmitting end, receiving the second voltage signal, and converting the second voltage signal into an AC voltage signal; a wireless charging receiving end, receiving the AC voltage signal, converting the AC voltage signal into a DC voltage signal, and the DC voltage signal is used to charge a functional module on the wearable smart device.

[0005] The above wearable smart devices divide the external voltage signal into two paths, one path directly charges the watch body, and the other path charges the functional module through the wireless charging transmitter and the wireless charging receiver. In this way, one charging cable can be used to charge the functional module and the watch body, which simplifies the charging process, reduces the charging cost, and improves the user experience.

[0006] In one implementation, the wireless charging transmitting end includes: multiple MOS tubes, a first oscillation circuit and a control circuit; the first oscillation circuit includes a first capacitor and a first inductor, which are used to transmit the AC voltage signal to the wireless charging receiving end; the multiple MOS tubes include a first MOS tube and a second MOS tube, the drain of the first MOS tube is used to receive the second voltage signal, the source of the first MOS tube is connected to the first inductor through the first capacitor, and the gate of the first MOS tube is connected to the control circuit; the drain of the second MOS tube is connected to the first inductor, the source of the second MOS tube is grounded, and the gate of the second MOS tube is connected to the control circuit; the control circuit is used to control the conduction / cutoff of the first MOS tube and the second MOS tube, when the first MOS tube and the second MOS tube are turned on, the level of the AC voltage signal is a first high level; when the first MOS tube and the second MOS tube are turned off, the AC voltage signal is a low level.

[0007] The above wearable smart device controls the fast switching of the on / off of multiple MOS tubes through the control circuit, thereby converting the second voltage signal into an AC voltage signal, reducing energy loss and improving energy conversion efficiency. By adjusting the frequency of the control circuit, the frequency of the AC voltage signal can be changed to meet the charging needs of the user. The first oscillation circuit sends the AC voltage signal to the wireless charging receiving end, which can realize one charging cable to charge the functional module and the watch body, further simplifying the charging process and reducing the charging cost.

[0008] In one implementation, the plurality of MOS transistors further include: a third MOS transistor, a drain of the third MOS transistor receiving the second voltage signal, a source of the third MOS transistor connected to the first inductor, and a gate of the third MOS transistor connected to the control circuit; a fourth MOS transistor, a drain of the fourth MOS transistor connected to the first inductor through the first capacitor, a source of the fourth MOS transistor grounded, and a gate of the fourth MOS transistor connected to the fourth control circuit; the control circuit is further used to control the on / off of the third MOS transistor and the fourth MOS transistor, when the first MOS transistor and the second MOS transistor are turned on and the third MOS transistor and the fourth MOS transistor are turned off, the level of the AC voltage signal is a first high level; when the third MOS transistor and the fourth MOS transistor are turned on and the first MOS transistor and the second MOS transistor are turned off, the level of the AC voltage signal is a second high level, and the first high level and the second high level have opposite polarities; when the first MOS transistor, the second MOS transistor, the third MOS transistor and the fourth MOS transistor are all turned off, the level of the AC voltage signal is the low level.

[0009] The above wearable smart device controls the rapid switching of the on / off of multiple MOS tubes through the control circuit, thereby converting the second voltage signal into an AC voltage signal, and can also adjust the polarity of the AC voltage signal, further improving the charging flexibility and user experience.

[0010] In one implementation, the wireless charging receiving end includes: a second oscillation circuit, the second oscillation circuit includes a second capacitor and a second inductor, and is used to receive the AC voltage signal; a rectifier circuit, the rectifier circuit is connected to the second inductor through the second capacitor, and is used to convert the AC voltage signal into a DC voltage signal.

[0011] In one implementation, the rectifier circuit includes: a first diode, a second diode, a third diode and a fourth diode; the anode of the first diode is connected to the second capacitor, the cathode of the first diode is connected to the anode of the second diode; the cathode of the second diode is connected to the second inductor; the anode of the third diode is connected to the second inductor, the cathode of the third diode is connected to the anode of the fourth diode; the cathode of the fourth diode is connected to the second capacitor; when the level of the AC voltage signal is a first high level, the first diode and the second diode are turned on, and the third diode and the fourth diode are turned off; when the level of the AC voltage signal is a second high level, the third diode and the fourth diode are turned on, and the first diode and the second diode are turned off.

[0012] In one implementation, the wireless charging receiving end further includes: a filter circuit, and the filter circuit is used to filter the DC voltage signal.

[0013] In one implementation, the functional module includes a telescopic mechanism, and when the watch body and the telescopic mechanism are not charged, the telescopic mechanism is also used to adjust the length of the strap on the wearable smart device; the telescopic mechanism includes: a first sensor, a first processor, a piezoelectric drive and a piezoelectric device; the first sensor collects first contact data between the telescopic mechanism and the user's arm; the first processor receives the first contact data, and generates a first control signal when the first contact data does not meet a preset condition; the piezoelectric drive receives the first control signal, and drives the piezoelectric device to adjust the length of the strap of the wearable smart device according to the first control signal.

[0014] In one implementation, the watch body also includes: a second sensor and a second processor; the second sensor collects second contact data between the watch body and the user's arm; the second processor receives the second contact data and generates a second control signal when the second contact data does not meet a preset condition; the wireless charging transmitting end receives the second control signal and sends the second control signal to the piezoelectric driver through the wireless charging receiving end and the first processor in sequence; the piezoelectric driver drives the piezoelectric device according to the second control signal to adjust the strap length of the wearable smart device.

[0015] In one implementation, the second control signal is transmitted between the wireless charging transmitting end and the wireless charging receiving end by load modulation or back-off modulation.

[0016] In one implementation, the wearable smart device is a watch.

[0017] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0018] 1. By dividing the external voltage signal into two paths, one path directly charges the meter body, and the other path charges the functional module through the wireless charging transmitter and the wireless charging receiver, one charging cable can be used to charge the functional module and the meter body, which simplifies the charging process, reduces the charging cost, and improves the user experience.

[0019] 2. The control circuit controls the rapid switching of the on / off of multiple MOS tubes, thereby converting the second voltage signal into an AC voltage signal, reducing energy loss and improving energy conversion efficiency. By adjusting the frequency of the control circuit, the frequency of the AC voltage signal can be changed to meet the charging needs of the user. The first oscillation circuit sends the AC voltage signal to the wireless charging receiving end, which can realize one charging cable to charge the functional module and the meter body, further simplifying the charging process and reducing the charging cost.

[0020] 3. The control circuit controls the rapid switching of the on / off of multiple MOS tubes, thereby converting the second voltage signal into an AC voltage signal. At the same time, the polarity of the AC voltage signal can also be adjusted, further improving the charging flexibility and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0022] Figure 1 A schematic diagram of a wearable smart device provided in an embodiment of the present application is shown;

[0023] Figure 2 A structural block diagram of a wearable smart device provided in an embodiment of the present application is shown;

[0024] Figure 3 A circuit diagram of a wireless charging transmitter provided in an embodiment of the present application is shown;

[0025] Figure 4 A circuit diagram of a wireless charging receiving terminal provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0027] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0028] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0029] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

[0032] Wearable smart devices are portable electronic devices whose strap designs are mainly divided into buckle type, magnetic type and automatic adjustment type. Buckle straps are fixed by buckles, and users can manually adjust the length of the strap according to the thickness of their wrists. Magnetic straps use magnetic force to fix the straps, which is convenient for users to wear and remove quickly. Automatically adjustable straps usually have built-in sensors and fine-tuning mechanisms, which can monitor the user's wrist size in real time and automatically adjust the length of the strap to adapt to different wrist thicknesses. Automatically adjustable wearable smart devices include a watch body and a telescopic mechanism, wherein the telescopic mechanism is used to adjust the length of the strap of the wearable smart device.

[0033] When the battery of the wearable smart device is low, two charging cables are required to charge the functional module and the watch body on the wearable smart device respectively. Therefore, the embodiment of the present application can achieve at least one of the following beneficial effects by respectively setting a wireless charging transmitter and a wireless charging receiver on the wearable smart device to transmit the external voltage signal to the functional module on the wearable smart device through wireless transmission: by setting a wireless charging transmitter and a wireless charging receiver, one charging cable can be used to charge the functional module and the watch body, simplifying the charging process and reducing costs; improving the user experience and charging flexibility.

[0034] The following is explained with reference to the accompanying drawings:

[0035] Reference Figure 1 , which shows a schematic diagram of a wearable smart device provided in an embodiment of the present application, such as Figure 1 As shown, it includes: a watch body 100, a functional module, a wireless charging transmitting end and a wireless charging receiving end, wherein the functional module can be a telescopic mechanism 200. The wireless charging transmitting end receives a second voltage signal, and is used to convert the second voltage signal into an AC voltage signal; the wireless charging receiving end receives an AC voltage signal, and converts the AC voltage signal into a DC voltage signal, and the DC voltage signal is used to charge the functional module on the wearable smart device.

[0036] The display on the watch body 100 will display the remaining power of the watch body 100 and the functional module in real time. When the watch body 100 and the functional module need to be charged, the side of the watch body 100 is connected to the external adapter by magnetic attraction, and is used to receive the external voltage signal of the external adapter for charging. Among them, after the wireless charging transmitting end converts the second voltage signal into an AC voltage signal, it sends the AC voltage signal to the wireless charging receiving end by magnetic resonance, and the wireless charging receiving end converts the AC voltage signal into a DC voltage signal to charge the functional module on the wearable smart device. In this way, the functional module and the watch body on the wearable smart device can be charged by a charging cable, and the functional module can be charged by magnetic resonance at the same time, which can further improve the charging efficiency compared with the electromagnetic induction charging method. In the embodiment of the present application, the adapter can be a voltage / current adapter, which is used to convert the external power supply into the voltage signal / current signal required by the wearable smart device. The functional module can also include NFC and a monitoring module with wireless communication function (such as a blood pressure monitoring module, a blood sugar monitoring module, a heart rate monitoring module, and a photoelectric volume pulse graph (PPG) module, etc.).

[0037] The following takes the functional module as an example of a telescopic mechanism for detailed explanation:

[0038] Reference Figure 2 , which shows a structural block diagram of a wearable smart device provided in an embodiment of the present application, such as Figure 2 As shown, it includes: a watch body 100 and a telescopic mechanism 200. The watch body 100 is used to receive an external voltage signal, and the external voltage signal is divided into a first voltage signal and a second voltage signal after entering the watch body 100. The watch body 100 includes a power management unit 110, a wireless charging transmitting terminal 120 and a first battery 130; the telescopic mechanism 200 includes a wireless charging receiving terminal 210 and a second battery 220. The power management unit 110 is used to control the first voltage signal to charge the watch body 100. When the watch body 100 and the telescopic mechanism 200 are not charged, the telescopic mechanism 200 is also used to adjust the length of the strap on the wearable smart device.

[0039] The watch body 100 receives an external voltage signal through the adapter 300. After entering the watch body, the external voltage signal is divided into two paths, one path is a first voltage signal, and the other path is a second voltage signal. Both the first voltage signal and the second voltage signal are DC voltage signals. Among them, the power management unit 110 controls the first voltage signal to charge the first battery 130 inside the watch body 100. The wireless charging transmitting end 120 receives the second voltage signal, and outputs a pulse width modulation wave (Pulse Width Modulation, PWM) of a preset frequency according to user needs, and converts the second voltage signal into an AC voltage signal (the frequency of the AC voltage signal is the same as that of the pulse width modulation wave of the preset frequency). The wireless charging transmitting end 120 sends the AC voltage signal to the wireless charging receiving end 210 by magnetic resonance. The wireless charging receiving end 210 converts the AC voltage signal into a DC voltage signal, and transmits the DC voltage signal to the second battery 220 to charge the second battery 220. When the watch body 100 and the telescopic mechanism 200 are not charged, the telescopic mechanism 200 can automatically detect whether the telescopic mechanism 200 and the user's arm are in good contact, and according to the detection result, the telescopic mechanism 200 can automatically adjust the length of the strap on the wearable smart device.

[0040] In the embodiment of the present application, by dividing the external voltage signal into two paths, one path is used to directly charge the watch body through the power management module, and the other path is used to charge the functional module through the wireless charging transmitter and the wireless charging receiver. It is possible to charge the functional module and the watch body with one charging cable, which simplifies the charging process and reduces the charging cost, while improving the user experience.

[0041] In some embodiments of the present application, the wearable smart device may be a watch. The watch strap may be designed in a variety of ways, including but not limited to a buckle design or a magnetic design. Due to the different thicknesses of wrists of different users and the limited adjustable length of the watch strap, when the user wears the watch, the watch strap is either too tight or too loose, making it difficult to achieve an ideal fit. If an automated way of adjusting the watch strap is used, two separate charging cables are required when charging the watch: one for charging the watch body itself and the other specifically for driving the telescopic mechanism.

[0042] The embodiment of the present application divides the external voltage signal into two paths, one path is used to charge the watch body through the power management unit, and the other path is used to charge the telescopic mechanism on the watch through the wireless charging transmitter and the wireless charging receiver, so that one charging cable can charge the telescopic mechanism and the watch body, simplifying the charging process and reducing the charging cost. When the watch body and the telescopic mechanism are not charged, the length of the watch strap can also be adjusted, improving the user experience.

[0043] Reference Figure 3, which shows a circuit diagram of a wireless charging transmitter provided in an embodiment of the present application, such as Figure 3 As shown, the wireless charging transmitting end includes: multiple MOS transistors, a first oscillation circuit and a control circuit 127; the first oscillation circuit includes a first capacitor 125 and a first inductor 126, which are used to transmit an AC voltage signal to the wireless charging receiving end; the multiple MOS transistors include a first MOS transistor 121 and a second MOS transistor 122, the drain of the first MOS transistor 121 is used to receive the second voltage signal, the source of the first MOS transistor 121 is connected to the first inductor 126 through the first capacitor 125, and the gate of the first MOS transistor 121 is connected to the control circuit 127; the drain of the second MOS transistor 122 is connected to the first inductor 126, the source of the second MOS transistor 122 is grounded, and the gate of the second MOS transistor 122 is connected to the control circuit 127; the control circuit 127 is used to control the on / off of the first MOS transistor 121 and the second MOS transistor 122. When the first MOS transistor 121 and the second MOS transistor 122 are turned on, the level of the AC voltage signal is a first high level; when the first MOS transistor 121 and the second MOS transistor 122 are turned off, the AC voltage signal is a low level.

[0044] The control circuit 127 is used to output a pulse width modulation wave of a preset frequency, control the conduction / cutoff of the first MOS transistor 121 and the second MOS transistor 122, so as to convert the second voltage signal into an AC voltage signal, wherein the user can set the preset frequency of the pulse width modulation wave according to the demand, and then adjust the frequency of the AC voltage signal. For example, when a certain phase in the pulse width modulation wave of the preset frequency is a high level, the control circuit 127 controls the conduction of the first MOS transistor 121 and the second MOS transistor 122, and the second voltage signal is transmitted to the first capacitor 125 through the first MOS transistor 121, and then transmitted from the first capacitor 125 to the first inductor 126, and then transmitted from the first inductor 126 to the second MOS transistor 122, and finally grounded, and the second voltage signal is converted into an AC voltage signal in this loop, and the AC voltage signal is also a high level at this time. Similarly, when a certain phase in the pulse width modulation wave of the preset frequency is a low level, the control circuit 127 controls the cutoff of the first MOS transistor 121 and the second MOS transistor 122, and the AC voltage signal generated at this time is also a low level. The first oscillating circuit composed of the first capacitor 125 and the first inductor 126 resonates and sends an AC voltage signal to the wireless charging receiving end 210. The wireless charging receiving end 210 then converts the AC voltage signal into a DC voltage signal to charge the second battery 220.

[0045] In the embodiment of the present application, the control circuit controls the rapid switching of the on / off of multiple MOS tubes, thereby converting the second voltage signal into an AC voltage signal, reducing energy loss and improving energy conversion efficiency. By adjusting the frequency of the control circuit, the frequency of the AC voltage signal can be changed to meet the charging needs of the user. The first oscillation circuit sends the AC voltage signal to the wireless charging receiving end, which can realize charging the functional module and the watch body with one charging cable, further simplifying the charging process and reducing the charging cost.

[0046] The frequency and polarity of the AC voltage signal are related to the pulse width modulation wave of the preset frequency. When the pulse width modulation wave of the preset frequency has a high level with opposite polarity, the AC voltage signal will also have a high level with opposite polarity. Figure 3 In a circuit diagram of a wireless charging transmitter provided in an embodiment of the present application, the multiple MOS tubes further include: a third MOS tube 123 and a fourth MOS tube 124. The drain of the third MOS transistor 123 receives the second voltage signal, the source of the third MOS transistor 123 is connected to the first inductor 126, and the gate of the third MOS transistor 123 is connected to the control circuit 127; the drain of the fourth MOS transistor 124 is connected to the first inductor 126 through the first capacitor 125, the source of the fourth MOS transistor 124 is grounded, and the gate of the fourth MOS transistor 124 is connected to the control circuit 127; the control circuit 127 is also used to control the on / off of the third MOS transistor 123 and the fourth MOS transistor 124. When the first MOS transistor and the second MOS transistor are turned on and the third MOS transistor 123 and the fourth MOS transistor 124 are turned off, the level of the AC voltage signal is a first high level; when the third MOS transistor 123 and the fourth MOS transistor 124 are turned on and the first MOS transistor and the second MOS transistor are turned off, the level of the AC voltage signal is a second high level, and the first high level and the second high level have opposite polarities; when the first MOS transistor, the second MOS transistor, the third MOS transistor 123 and the fourth MOS transistor 124 are all turned off, the level of the AC voltage signal is a low level.

[0047] In the embodiment of the present application, the pulse width modulation wave of the preset frequency output by the control circuit 127 is also used to control the conduction / cutoff of the third MOS transistor 123 and the fourth MOS transistor 124, that is, the first MOS transistor 121 and the second MOS transistor 122 are turned on / off in pairs, and the third MOS transistor 123 and the fourth MOS transistor 124 are also turned on / off in pairs. When a phase in the pulse width modulation wave of the preset frequency is high level and the polarity is positive, the control circuit 127 controls the first MOS transistor 121 and the second MOS transistor 122 to be turned on, and controls the third MOS transistor 123 and the fourth MOS transistor 124 to be turned off. At this time, the second voltage signal is transmitted to the first capacitor 125 through the first MOS transistor 121, and then transmitted from the first capacitor 125 to the first inductor 126, and then transmitted from the first inductor 126 to the second MOS transistor 122, and finally grounded. The second voltage signal is converted into an AC voltage signal in this loop, and the level of the AC voltage signal is the first high level. Similarly, when a certain phase in the pulse width modulation wave of the preset frequency is high level and the polarity is negative, the control circuit 127 controls the first MOS tube 121 and the second MOS tube 122 to be turned off, and controls the third MOS tube 123 and the fourth MOS tube 124 to be turned on. At this time, the second voltage signal passes through the third MOS tube 123, flows through the first inductor 126 and the first capacitor 125 in sequence, and then passes through the fourth MOS tube 124 to be grounded. The second voltage signal is converted into an AC voltage signal in this loop, and the level of the AC voltage signal is the second highest level. Similarly, when a certain phase in the pulse width modulation wave of the preset frequency is low level, the control circuit 127 controls the first MOS tube 121, the second MOS tube 122, the third MOS tube 123 and the fourth MOS tube 124 to be turned off, and the generated AC voltage signal is also low level. Finally, after resonating through the first oscillation circuit, the AC voltage signal is sent to the wireless charging receiving end 210 and converted into a DC signal to charge the second battery 220.

[0048] In an embodiment of the present application, the control circuit controls the rapid switching of the on / off of multiple MOS tubes, thereby converting the second voltage signal into an AC voltage signal. At the same time, the polarity of the AC voltage signal can also be adjusted, further improving the charging flexibility and user experience.

[0049] Reference Figure 4 , which shows a circuit diagram of a wireless charging receiving terminal provided in an embodiment of the present application, such as Figure 4As shown, it includes: a second oscillating circuit, a rectifying circuit and a filtering circuit. The second oscillating circuit includes a second capacitor 211 and a second inductor 212. The second oscillating circuit is used to receive an AC voltage signal; the rectifying circuit is connected to the second inductor 212 through the second capacitor 211, and is used to convert the AC voltage signal into a DC voltage signal. The filtering circuit is used to filter the DC voltage signal. The rectifier circuit includes: a first diode 213, a second diode 214, a third diode 215 and a fourth diode 216; the anode of the first diode 213 is connected to the second capacitor 211, and the cathode of the first diode 213 is connected to the anode of the second diode 214; the cathode of the second diode 214 is connected to the second inductor 212; the anode of the third diode 215 is connected to the second inductor 212, and the cathode of the third diode 215 is connected to the anode of the fourth diode 216; the cathode of the fourth diode 216 is connected to the second capacitor 211; when the level of the AC voltage signal is a first high level, the first diode 213 and the second diode 214 are turned on, and the third diode 215 and the fourth diode 216 are turned off; when the level of the AC voltage signal is a second high level, the third diode 215 and the fourth diode 216 are turned on, and the first diode 213 and the second diode 214 are turned off.

[0050] In the embodiment of the present application, the first diode 213 and the second diode 214 are turned on / off in pairs, and the third diode 215 and the fourth diode 216 are also turned on / off in pairs. When the AC voltage signal received by the second oscillation circuit composed of the second capacitor 211 and the second inductor 212 is the first high level, the first diode 213 and the second diode 214 are turned on, and the third diode 215 and the fourth diode 216 are turned off. At this time, the AC voltage signal passes through the second capacitor 211, flows through the first diode 213, the filter circuit, the second diode 214 in sequence, and finally flows into the second inductor 212 to form a loop, and the AC voltage signal is converted into a DC signal in this loop. The filter circuit filters the DC signal and charges the second battery 220.

[0051] When the AC voltage signal received by the second oscillating circuit composed of the second capacitor 211 and the second inductor 212 is at the second high level, the first diode 213 and the second diode 214 are turned off, and the third diode 215 and the fourth diode 216 are turned on. At this time, the AC voltage signal passes through the fourth diode 216, flows through the filter circuit, the third diode 215, the second capacitor 211 in sequence, and finally flows into the second inductor 212 to form a loop, and the AC voltage signal is converted into a DC signal in this loop. The filter circuit filters the DC signal and charges the second battery 220.

[0052] When the AC voltage signal received by the second oscillation circuit composed of the second capacitor 211 and the second inductor 212 is at a low level, the first diode 213 , the second diode 214 , the third diode 215 and the fourth diode 216 are all turned off.

[0053] It is conceivable that if the AC voltage signal received by the second oscillator circuit includes a first high level and a low level, the first diode 213 and the second diode 214 are turned on / off accordingly. The third diode 215 and the fourth diode 216 are always in the off state and do not participate in rectification.

[0054] If the AC voltage signal received by the second oscillator circuit includes the second high level and the low level, the third diode 215 and the fourth diode 216 are turned on / off accordingly. The first diode 213 and the second diode 214 are always in the off state and do not participate in rectification.

[0055] In the embodiments of the present application, the rectifier circuit can be in various forms, for example, including but not limited to a half-wave rectifier circuit, a full-wave rectifier circuit, a voltage doubler rectifier circuit, a synchronous rectifier circuit, a phase-controlled rectifier circuit, a switch rectifier circuit, etc.

[0056] In some embodiments of the present application, refer to the attached Figure 2 The telescopic mechanism also includes: a first sensor, a first processor 230, a piezoelectric driver 240 and a piezoelectric device 250; the first sensor collects first contact data between the telescopic mechanism 200 and the user's arm; the first processor 230 receives the first contact data, and generates a first control signal when the first contact data does not meet a preset condition; the piezoelectric driver 240 receives the first control signal, and drives the piezoelectric device 250 to adjust the strap length of the wearable smart device according to the first control signal.

[0057] The first sensor is disposed on the telescopic mechanism 200 and is used to collect first contact data. The first processor 230 determines whether the first contact data meets a preset condition, and generates a first control signal when the first contact data does not meet the preset condition (i.e., the telescopic mechanism 200 is not in good contact with the user's arm). The piezoelectric driver 240 drives the piezoelectric device 250 to adjust the strap length of the wearable smart device according to the first control signal until the wearable smart device is well worn.

[0058] In some embodiments of the present application, refer to the attached Figure 2The watch body also includes: a second sensor and a second processor 140; the second sensor collects second contact data between the watch body and the user's arm; the second processor 140 receives the second contact data, and generates a second control signal when the second contact data does not meet the preset conditions; the wireless charging transmitting end 120 receives the second control signal, and sends the second control signal to the piezoelectric driver 240 through the wireless charging receiving end 210 and the first processor 230 in sequence; the piezoelectric driver 240 drives the piezoelectric device 250 according to the second control signal to adjust the strap length of the wearable smart device.

[0059] During the charging process, the watch body 100 and the telescopic mechanism 200 can establish a two-way communication link between the wireless charging transmitting end 120 and the wireless charging receiving end 210 to transfer data. The second sensor is arranged at the bottom of the watch body 100 to collect the second contact data. The second processor 140 determines whether the second contact data meets the preset conditions. When the second contact data does not meet the preset conditions (that is, the watch body 100 is not in good contact with the user's arm), a second control signal is generated and sent to the first processor 230 through the two-way communication link established between the wireless charging transmitting end 120 and the wireless charging receiving end 210. The first processor 230 then sends the second control signal to the piezoelectric driver 240, and the piezoelectric driver 240 drives the piezoelectric device 250 to adjust the strap length of the wearable smart device according to the second control signal until the wearable smart device is well worn.

[0060] In the embodiment of the present application, the sensor may be a photoplethysmogram sensor, a skin impedance sensor, a capacitive proximity sensor, a pressure sensor, etc. The bidirectional communication link between the wireless charging transmitter 120 and the wireless charging receiver 210 is established in a manner including but not limited to load modulation, back-off modulation, and digital scheduling demodulation technology.

[0061] In some embodiments of the present application, the wearable smart device is a watch.

[0062] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A wearable smart device, characterized in that: After entering the wearable smart device, the external voltage signal is divided into a first voltage signal and a second voltage signal, wherein the first voltage signal is used to charge the body of the wearable smart device, including: A wireless charging transmitting end, receiving the second voltage signal, and configured to convert the second voltage signal into an AC voltage signal; The wireless charging receiving end receives the AC voltage signal and converts the AC voltage signal into a DC voltage signal, wherein the DC voltage signal is used to charge the functional module on the wearable smart device.

2. The wearable smart device according to claim 1, characterized in that: The wireless charging transmitting end comprises: A plurality of MOS tubes, a first oscillation circuit and a control circuit; The first oscillation circuit includes a first capacitor and a first inductor, and is used to transmit the AC voltage signal to the wireless charging receiving end; The multiple MOS transistors include a first MOS transistor and a second MOS transistor, the drain of the first MOS transistor is used to receive the second voltage signal, the source of the first MOS transistor is connected to the first inductor through the first capacitor, and the gate of the first MOS transistor is connected to the control circuit; The drain of the second MOS transistor is connected to the first inductor, the source of the second MOS transistor is grounded, and the gate of the second MOS transistor is connected to the control circuit; The control circuit is used to control the on / off of the first MOS tube and the second MOS tube. When the first MOS tube and the second MOS tube are turned on, the level of the AC voltage signal is a first high level; When the first MOS transistor and the second MOS transistor are turned off, the AC voltage signal is at a low level.

3. The wearable smart device according to claim 2, characterized in that: The plurality of MOS tubes further include: a third MOS transistor, wherein a drain of the third MOS transistor receives the second voltage signal, a source of the third MOS transistor is connected to the first inductor, and a gate of the third MOS transistor is connected to the control circuit; a fourth MOS transistor, wherein a drain of the fourth MOS transistor is connected to the first inductor through the first capacitor, a source of the fourth MOS transistor is grounded, and a gate of the fourth MOS transistor is connected to the control circuit; The control circuit is also used to control the on / off of the third MOS tube and the fourth MOS tube. When the first MOS tube and the second MOS tube are turned on and the third MOS tube and the fourth MOS tube are turned off, the level of the AC voltage signal is a first high level; When the third MOS tube and the fourth MOS tube are turned on and the first MOS tube and the second MOS tube are turned off, the level of the AC voltage signal is a second high level, and the first high level and the second high level have opposite polarities; When the first MOS transistor, the second MOS transistor, the third MOS transistor and the fourth MOS transistor are all turned off, the level of the AC voltage signal is the low level.

4. The wearable smart device according to claim 3, characterized in that: The wireless charging receiving end comprises: a second oscillation circuit, the second oscillation circuit comprising a second capacitor and a second inductor, for receiving the AC voltage signal; A rectifier circuit, wherein the rectifier circuit is connected to the second inductor via the second capacitor, and is used for converting the AC voltage signal into a DC voltage signal.

5. The wearable smart device according to claim 4, characterized in that: The rectifier circuit comprises: a first diode, a second diode, a third diode, and a fourth diode; An anode of the first diode is connected to the second capacitor, and a cathode of the first diode is connected to the anode of the second diode; The cathode of the second diode is connected to the second inductor; An anode of the third diode is connected to the second inductor, and a cathode of the third diode is connected to the anode of the fourth diode; The cathode of the fourth diode is connected to the second capacitor; When the level of the AC voltage signal is a first high level, the first diode and the second diode are turned on, and the third diode and the fourth diode are turned off; When the level of the AC voltage signal is at the second high level, the third diode and the fourth diode are turned on, and the first diode and the second diode are turned off.

6. The wearable smart device according to claim 1, characterized in that: The wireless charging receiving end further includes: A filter circuit, wherein the filter circuit is used to filter the DC voltage signal.

7. The wearable smart device according to claim 1, characterized in that: The functional module includes a telescopic mechanism, and when the watch body and the telescopic mechanism are not charged, the telescopic mechanism is also used to adjust the length of the strap on the wearable smart device; The telescopic mechanism includes a first sensor, a first processor, a piezoelectric drive and a piezoelectric device; The first sensor collects first contact data between the telescopic mechanism and the user's arm; The first processor receives the first contact data, and generates a first control signal when the first contact data does not meet a preset condition; The piezoelectric driver receives the first control signal and drives the piezoelectric device to adjust the strap length of the wearable smart device according to the first control signal.

8. The wearable smart device according to claim 7, characterized in that: The table body also includes: a second sensor and a second processor; The second sensor collects second contact data between the watch body and the user's arm; The second processor receives the second contact data, and generates a second control signal when the second contact data does not meet a preset condition; The wireless charging transmitting end receives the second control signal, and sends the second control signal to the piezoelectric driver through the wireless charging receiving end and the first processor in sequence; The piezoelectric driver drives the piezoelectric device to adjust the length of the strap of the wearable smart device according to the second control signal.

9. The wearable smart device according to claim 8, characterized in that: The second control signal is transmitted between the wireless charging transmitting end and the wireless charging receiving end by load modulation or back-off modulation.

10. The wearable smart device according to claim 1, characterized in that: The wearable smart device is a watch.

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