Long-endurance intelligent wearable device

Abstract

The utility model discloses long-endurance intelligent wearable equipment, and relates to the technical field of wearable equipment. The long-endurance intelligent wearable device comprises a device body and a flexible wrist strap, the device body comprises a shell, an energy storage module and a conversion energy supply circuit, the energy storage module and the conversion energy supply circuit are arranged in the shell, and the conversion energy supply circuit is electrically connected with a piezoelectric layer in the flexible wrist strap and used for converting electric energy generated by the piezoelectric layer into direct current and storing the direct current in the energy storage module; the flexible wrist strap comprises a supporting layer and at least two piezoelectric layers, the two piezoelectric layers are arranged on the two sides of the supporting layer respectively, and the supporting layer and the piezoelectric layers are made of flexible materials. The flexible wrist strap provided by the utility model can be used for supplying power to the intelligent wearable equipment so as to enhance the cruising ability of the intelligent wearable equipment.

Description

Technical Field

[0001] This utility model relates to the field of wearable device technology, and in particular to a long-lasting smart wearable device. Background Technology

[0002] With the development of technology, smart wearable devices such as smartwatches and smart bracelets are becoming increasingly diversified. Today's smartwatches are no longer limited to simple time display, but are constantly integrating various smart functions, from convenient communication functions to accurate and comprehensive health monitoring functions, rich sports mode tracking, and a wide range of life assistance functions, such as mobile payment, navigation, and music playback, making smartwatches and their derivative smart bracelets more like small smart terminals worn on the wrist.

[0003] However, the continuous expansion of functions has also brought new challenges to smartwatches, among which the issue of battery life has become increasingly prominent. Existing smartwatches typically rely on battery power and require regular charging. When users are outdoors and unable to charge their smartwatches or forget to charge them, it often causes some inconvenience. Therefore, the battery life of smartwatches is a significant bottleneck and a key competitive point in the current smart wearable device market, and products with long battery life are generally more favored by users. Utility Model Content

[0004] This invention provides a long-lasting smart wearable device, aiming to extend the battery life of smart wearable devices.

[0005] The flexible wristband provided by this utility model includes:

[0006] Support layer;

[0007] The piezoelectric layer has at least two layers; the two piezoelectric layers are respectively disposed on both sides of the support layer;

[0008] Both the support layer and the piezoelectric layer are made of flexible materials.

[0009] Optionally, the piezoelectric layer is made of at least one of organic piezoelectric polymers, flexible piezoelectric ceramics, and piezoelectric ceramic composite materials.

[0010] Optionally, the support layer is made of polymer or carbon fiber composite material.

[0011] Optionally, the flexible wristband further includes:

[0012] A protective layer is applied to the surface of the piezoelectric layer; the protective layer is made of leather or silicone.

[0013] Optionally, the flexible wristband includes a first end and a second end in the length direction, and the first end of the flexible wristband is provided with at least one first spring pin on each side;

[0014] The support layer is provided with conductive lines, and the first spring PIN is electrically connected to the piezoelectric layer through the conductive lines.

[0015] Optionally, the flexible wristband includes a sensor;

[0016] The first end of the flexible wristband is also provided with a second spring pin; the second spring pin is electrically connected to the signal output terminal of the sensor.

[0017] This utility model also provides a long-lasting smart wearable device, including the device body and the flexible wristband described above;

[0018] The device body includes a housing, and an energy storage module and a power conversion circuit disposed inside the housing;

[0019] The conversion power supply circuit is electrically connected to the piezoelectric layer of the flexible wristband, and is used to convert the electrical energy generated by the piezoelectric layer into direct current and store it in the energy storage module.

[0020] Optionally, the housing is provided with a connection slot;

[0021] The inner wall of the connection slot is provided with multiple PIN holes; at least two opposite PIN holes are provided with contacts that are electrically connected to the conversion power supply circuit.

[0022] Optionally, the housing contains a processor; at least one pin hole contains a contact that is electrically connected to the processor.

[0023] Optionally, the flexible wristband is further provided with a buckle assembly at the end where the first spring PIN is located, and the housing of the device body is correspondingly provided with a buckle unlocking device;

[0024] The buckle assembly and the connection slot interlock to detachably connect the housing and the wristband; the buckle unlocking device is used to release the buckle connection between the buckle assembly and the connection slot.

[0025] Optionally, the conversion power supply circuit includes a piezoelectric conversion circuit, a voltage regulator circuit, a rectifier filter circuit, and a boost circuit that are sequentially connected from the input terminal to the output terminal of the conversion power supply circuit;

[0026] The input terminal of the piezoelectric conversion circuit is electrically connected to the output terminal of the piezoelectric layer. The piezoelectric conversion circuit is used to convert the electrical energy generated by the piezoelectric layer into direct current. The voltage regulator circuit is used to stabilize the voltage of the direct current output by the piezoelectric conversion circuit. The rectifier and filter circuit is used to rectify and filter the current output by the voltage regulator circuit. The boost circuit is used to convert the voltage output by the rectifier and filter circuit into the preset charging voltage of the energy storage module. The output terminal of the boost circuit is electrically connected to the energy storage module.

[0027] Optionally, the piezoelectric conversion circuit includes a first capacitor, and a first diode, a second diode, a third diode, and a fourth diode constituting a rectifier bridge;

[0028] The cathodes of the first diode and the third diode are electrically connected to the output terminal of the piezoelectric layer, and the anodes of the first diode and the third diode are grounded; the anodes of the second diode and the fourth diode are electrically connected to the output terminal of the piezoelectric layer, and the cathodes of the second diode and the fourth diode are electrically connected to the first terminal of the first capacitor, and the second terminal of the first capacitor is grounded; the two ends of the first capacitor are electrically connected to the input terminal of the voltage regulator circuit.

[0029] The voltage regulator circuit includes a second capacitor, a linear regulator, and a third capacitor;

[0030] The second capacitor is connected in parallel with the first capacitor; the two ends of the second capacitor are electrically connected to the input terminal of the linear regulator, and the output terminal of the linear regulator is electrically connected to the two ends of the third capacitor; the two ends of the third capacitor are electrically connected to the input terminal of the rectifier filter circuit.

[0031] The rectifier filter circuit includes a fourth capacitor and a fifth diode;

[0032] The fourth capacitor is connected in parallel with the third capacitor. The first terminal of the fourth capacitor is electrically connected to the cathode of the fifth diode, and the second terminal of the fourth capacitor is grounded. The fifth diode is connected to the input terminal of the boost circuit.

[0033] Optionally, the boost circuit includes a first inductor, a first transistor, a sixth diode, and a fifth capacitor;

[0034] The first end of the first inductor is electrically connected to the anode of the fifth diode, the second end of the first inductor is electrically connected to the collector of the first transistor, and the emitter of the first transistor is grounded; the second end of the first inductor is also electrically connected to the anode of the sixth diode, the cathode of the sixth diode is electrically connected to the first end of the fifth capacitor, and the second end of the fifth capacitor is grounded; the two ends of the fifth capacitor are the output terminals of the boost circuit.

[0035] Optionally, the long-battery-life smart wearable device is a smartwatch or a smart bracelet.

[0036] This utility model has the following beneficial effects:

[0037] The flexible wristband provided by this utility model has piezoelectric layers on both sides of the support layer. When the user moves, the flexible wristband is affected by vibration, impact, deformation, etc. The piezoelectric layers on both sides of the support layer can efficiently convert the mechanical energy of the flexible wristband into electrical energy, thereby powering the smart wearable device and enhancing the battery life of the smart wearable device. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the long-battery-life smart wearable device of this utility model;

[0040] Figure 2 This is a schematic diagram of the disassembled connection portion of an embodiment of the long-battery-life smart wearable device of this utility model;

[0041] Figure 3 This is a schematic diagram of the structure of an embodiment of the first spring PIN used in this utility model;

[0042] Figure 4 This is a circuit structure diagram of an embodiment of the power conversion circuit of this utility model.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Device body; 2. Flexible wristband; 101. Housing; 102. Power supply conversion circuit; 103. Energy storage module; 104. First PIN hole; 105. Connection slot; 106. Buckle unlocking device; 201. Support layer; 202. Piezoelectric layer; 203. Protective layer; 204. First spring PIN; 204-1. Needle shaft; 204-2. Needle tube; 204-3. Spring; 205. Buckle assembly; 205-1. Outer buckle; 205-2. Inner buckle;

[0045] 1021. Piezoelectric conversion circuit; 1022. Voltage regulator circuit; 1023. Rectifier and filter circuit; 1024. Boost circuit; 1025. Battery charging management unit. Detailed Implementation

[0046] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0047] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0048] This utility model proposes a long-lasting smart wearable device.

[0049] See Figure 1 In one embodiment, the flexible wristband 2 proposed in this invention includes:

[0050] Support layer 201;

[0051] The piezoelectric layer 202 has at least two layers; the two piezoelectric layers 202 are respectively disposed on both sides of the support layer 201; both the support layer 201 and the piezoelectric layer 202 are made of flexible materials.

[0052] The flexible wristband provided in this embodiment has piezoelectric layers on both sides of the support layer. When the user moves, the flexible wristband is affected by vibration, impact, deformation, etc. The piezoelectric layers on both sides of the support layer can efficiently convert the mechanical energy of the flexible wristband into electrical energy, thereby powering the smart wearable device and enhancing the battery life of the smart wearable device.

[0053] In a preferred embodiment, the first end of the flexible wristband 2 is used to connect to the device body of the smart wearable device, thereby powering the smart wearable device, while the second end is not connected to the smart wearable device. At the second end of the flexible wristband 2, the piezoelectric layers 202 on both sides of the support layer 201 can be pressed together to increase the amount of electricity and voltage that the piezoelectric layer 202 can generate.

[0054] In this embodiment, the piezoelectric layer 202 is the core functional layer of the flexible wristband 2 and is made of flexible piezoelectric material.

[0055] In some embodiments, the flexible piezoelectric material can be an organic piezoelectric polymer, such as polyvinylidene fluoride (PVDF) and its copolymers; or a piezoelectric ceramic composite material, such as piezoelectric ceramic crystals such as lead zirconate titanate (PZT), barium titanate (BaTiO3), zinc oxide (ZnO), cadmium sulfide (CdS). These piezoelectric ceramic crystals can be made into nanoparticles dispersed in a polymer matrix to form a composite material, or they can be made into nanowires and composited with polymers to overcome the shortcomings of traditional piezoelectric materials being hard and brittle, while maintaining a high piezoelectric response. In some recent studies, piezoelectric ceramic crystal films prepared by some special processes also have a certain degree of flexibility. For example, self-supporting BaTiO3 single crystal films can be used to prepare the piezoelectric layer of this embodiment.

[0056] It should be noted that the materials used in the above specific implementations, or the materials that can be equivalently substituted, are all flexible piezoelectric materials that have been verified by materials science in the prior art. The materials listed are only used to further illustrate in detail the materials that the piezoelectric layer 202 provided by this utility model can achieve in conjunction with the scheme of any of the above embodiments, so that those skilled in the art can understand the scheme and apply it based on this specification. In specific implementations, those skilled in the art can adjust the parameters and structure of the piezoelectric layer 202 based on the materials according to actual needs, and no restrictions are imposed here.

[0057] In a preferred embodiment, the piezoelectric layer 202 is a self-supporting BaTiO3 single-crystal thin film; the BaTiO3 single-crystal thin film has excellent piezoelectric properties, and the piezoelectric energy harvester formed by the BaTiO3 single-crystal thin film can generate a voltage as high as 15.1V, a current of up to 2.39μA, and a power density of 17.33μW / cm². 2 It can maintain excellent piezoelectric properties even when bent. After a long period of research and development and testing, the applicant found that the characteristics of this material can meet the structural requirements of some embodiments of this utility model and the requirements for piezoelectric layer materials in practical applications.

[0058] In some embodiments, the support layer 201 is made of a high-strength flexible material. The support layer 201 with a certain structural strength can prevent the piezoelectric layer 202 from being excessively deformed or even broken, thereby improving the stability and service life of the piezoelectric layer in long-term use.

[0059] Specifically, the support layer 201 can be made of materials with greater structural strength, such as high-strength polymer materials or carbon fiber composite materials, according to the structural strength of the piezoelectric layer 202, to provide overall structural strength for the flexible wristband 2; among them, the high-strength polymer material can be one or more of polymer materials such as polyamide, polyimide, polyester, polycarbonate, and thermoplastic polyurethane.

[0060] In some embodiments, the flexible wristband 2 further includes a protective layer 203 disposed on the surface of the piezoelectric layer 202; the flexible wristband 2 is composed of three main structural layers, including the outermost protective layer 203, the innermost support layer 201, and the piezoelectric layer 202 disposed between the protective layer 203 and the support layer 201; the multi-layer stacked design can maximize the area of ​​the piezoelectric layer 202 and improve the upper limit of the amount of electricity generated by the piezoelectric layer 202 and the energy conversion efficiency.

[0061] In some embodiments, the protective layer 203 is made of a flexible material such as leather or silicone that can come into direct contact with the human body and is more comfortable to wear, providing users with a comfortable wearing experience while protecting the piezoelectric layer 202 from damage by external environmental substances such as water and sweat; the protective layer 203 and the piezoelectric layer 202 can be firmly connected by a high-strength adhesive or hot pressing process to ensure durability during long-term use.

[0062] See Figure 1 In one embodiment, the long-battery-life smart wearable device proposed by this utility model includes a device body 1 and a flexible wristband 2 provided in the above embodiment.

[0063] The device body 1 includes a housing 101, an energy storage module 103 and a power conversion circuit 102 disposed inside the housing 101;

[0064] The piezoelectric layer 202 of the flexible wristband 2 is electrically connected to the conversion power supply circuit 102, which is used to convert the electrical energy generated by the piezoelectric layer 202 into direct current and store it in the energy storage module 103.

[0065] In this embodiment, the smart wearable device can be a smartwatch or a smart bracelet; the device body of the smart wearable device typically includes a housing, a display screen, and a battery, processor, storage module, communication connection module, etc., located inside the housing; the energy storage module is typically a rechargeable battery, such as a lithium-ion battery or a lithium polymer battery, and the energy storage module is used to power the electronic components of the device body, such as the display screen, processor, storage module, communication connection module, etc.

[0066] Since the flexible wristband 2 is in a dynamically changing environment after the user wears the smart wearable device, the piezoelectric layer 202 is subjected to complex vibrations and impacts. The electrical energy generated is usually a continuous pulse current or a transient pulse current. In this embodiment, a conductive channel and a power supply circuit 102 are further designed so that the electrical energy generated by the piezoelectric layer 202 needs to be transmitted through the designed conductive channel to the power supply circuit 102 inside the device body 1. The conversion function circuit converts the electrical energy generated by the piezoelectric layer 202 into a stable DC current to charge the energy storage module 103.

[0067] The conductive channel refers to the electrical connection path between the piezoelectric layer 202 and the conversion power supply circuit 102. It typically includes a connector for electrically connecting the flexible wristband 2 to the device body 1, and conductive lines disposed on the support layer 201. The conductive lines are electrically connected to the connector, and the piezoelectric layer 202 is electrically connected to the conductive lines by conductive adhesive or ultrasonic welding, and then connected to the conversion power supply circuit 102 through the connector to realize the transmission of piezoelectric signals.

[0068] It should be noted that smartwatches or smart bracelets typically have two wristbands, each of which is detachably connected to one end of the device body. Both wristbands include the support layer 201, piezoelectric layer 202, and protective layer 203 described in the above embodiments.

[0069] This embodiment is based on the flexible wristband provided in the previous embodiment. By setting a conversion power supply circuit in the device body of the smart wearable device, the unstable pulse current generated by the piezoelectric layer in the flexible wristband is converted into DC power and stored in the energy storage module to power the electronic components in the device body, thereby enhancing the battery life of the smart wearable device.

[0070] Based on the above embodiments of long-battery-life smart wearable devices, see [link / reference]. Figure 2 In some more specific embodiments, the first end of the flexible wristband 2 is provided with at least one first spring pin 204 on each side, and the housing 101 is provided with a first pin hole 104 corresponding to the first spring pin 204; the support layer 201 is provided with a conductive line, and the first spring pin 204 is electrically connected to the piezoelectric layer 202 through the conductive line.

[0071] The first PIN hole 104 has a contact that is electrically connected to the power conversion circuit 102.

[0072] See Figure 3 The first spring pin 204 includes a needle tube 204-2, a spring 204-3 disposed inside the needle tube 204-2, and a needle shaft 204-1 connected to the spring 204-3 and having a diameter smaller than the inner diameter of the needle tube 204-2. The needle tube 204-2 is fixedly connected to the flexible wristband 2, and the needle shaft 204-1 is electrically connected to the conductive lines on the support layer 201 through the spring 204-3.

[0073] Specifically, one end of the housing 101 is provided with a connection slot 105 corresponding to the flexible wristband 2. The inner walls of the connection slot 105 are provided with first PIN pin holes 104 corresponding to the first spring PIN pin 204. When one end of the flexible wristband 2 is inserted into the connection slot 105, the needle shaft 204-1 is compressed into the needle tube 204-2, and the spring 204-3 is compressed. When the needle shaft 204-1 advances in the slot to the position of the first PIN pin hole 104, the needle shaft 204-1 is released from pressure and extends into the first PIN pin hole 104. The elastic force of the spring 204-3 reacts to the needle shaft 204-1, so that the needle shaft 204-1 fits tightly against the contact point electrically connected to the conversion power supply circuit 102, realizing "spring self-locking".

[0074] Understandably, on the one hand, the cooperation between the first spring PIN 204 and the first PIN hole 104 enables the flexible wristband 2 to be detachably connected to the device body 1; on the other hand, the elastic force of the spring 204-3 acts on the needle shaft 204-1, making the needle shaft 204-1 fit tightly against the contact point, ensuring the stability of the electrical connection and avoiding electrical connection problems caused by gap wobbling; in addition, since the extension and retraction of the spring 204-3 is adjustable, the first spring PIN 204 can be adapted to the PIN holes of different smart wearable devices with slight size differences.

[0075] In these embodiments, multiple first spring pins 204 and corresponding first pin holes 104 may be provided to enhance the connection stability between the flexible wristband 2 and the device body 1.

[0076] Furthermore, the device body 1 can be equipped with a multi-functional interface to support different types of signal transmission and energy conversion through other spring pins and pin holes.

[0077] In some embodiments, the flexible wristband 2 has a sensor inside, and the housing 101 has a processor inside;

[0078] The first end of the flexible wristband 2 is also provided with a second spring PIN, and the inner wall of the connecting slot 105 is provided with a second PIN hole corresponding to the second spring PIN; the second spring PIN is electrically connected to the signal output terminal of the sensor, and the inside of the second PIN hole is provided with a contact that is electrically connected to the processor.

[0079] It should be noted that the structure of the second spring pin and the second pin hole is the same as or similar to that of the first spring pin and the first pin hole. The terms "first" and "second" are only used to distinguish similar objects according to their different functions.

[0080] In these embodiments, the sensors disposed inside the flexible wristband 2 include one or more of various sensors suitable for integration into wearable devices, such as heart rate sensors, blood pressure sensors, temperature sensors, humidity sensors, barometric pressure sensors, air quality sensors, and motion posture sensors. The sensing signals collected by the sensors are transmitted to the device body 1 through conductive lines and a second spring pin correspondingly disposed in the flexible wristband 2. The processor in the device body 1 receives the sensing signals and transmits and displays the corresponding sensing information to the user through a display screen or communication connection module.

[0081] It is understood that in these embodiments where the sensor is set inside the wristband, the flexible wristband 2 may also be provided with a third spring pin, and the inner wall of the connecting slot 105 is provided with a corresponding third pin hole; the battery / energy storage module in the device body 1 can be electrically connected to the sensor through the third spring pin to power the sensor.

[0082] See Figure 2 In some specific embodiments, in order to further improve the connection stability between the flexible wristband 2 and the device body 1, the flexible wristband 2 is also provided with a buckle assembly 205 at the end where the first spring PIN foot 204 is provided, and the housing 101 is correspondingly provided with a buckle unlocking device 106.

[0083] The buckle assembly 205 and the connection slot 105 are interlocked to make the housing 101 detachably connected to the flexible wristband 2; the buckle unlocking device 106 is used to release the buckle connection between the buckle assembly 205 and the connection slot 105.

[0084] Specifically, the buckle assembly 205 includes an outer buckle 205-1 and an inner buckle 205-2. The outer buckle 205-1 is fixedly connected to the flexible material layer of the flexible wristband 2 (a laminated structure consisting of a support layer 201, a piezoelectric layer 202, and a protective layer 203). The inner buckle 205-2 is an arc-shaped or L-shaped connecting hook. Spring pins (including a first spring pin, a second spring pin, a third spring pin, etc.) are located on both sides of the outer buckle 205-1. Accordingly, the connecting slot 105 has a snap-fit ​​part (usually a protrusion or groove adapted to the shape of the connecting hook) that corresponds to the inner snap 205-2. When the outer snap 205-1 is inserted into the connecting slot 105, the outer snap 205-1 fits tightly against the inner wall of the connecting slot 105, the inner snap 205-2 deforms and returns to its original shape at the snap-fit ​​part position in the connecting slot 105, forming a mechanical lock with the snap-fit ​​part to prevent the flexible wristband 2 from falling off during vigorous exercise.

[0085] The housing 101 is also provided with a buckle unlocking device 106. The buckle unlocking device 106 can usually be a control button. When the user presses the control button, the inner buckle 205-2 or the snap-fit ​​part will deform, thereby allowing the buckle assembly 205 to be pulled out from the connection slot 105, realizing the quick disassembly and assembly of the flexible wristband 2 and the device body 1, which facilitates the replacement and cleaning of the flexible wristband 2.

[0086] It should be noted that the above embodiments of the buckle assembly 205 are only preferred embodiments of this utility model, which aim to improve the connection stability between the flexible wristband 2 and the device body 1 while taking into account ease of use and manufacturing cost; in other embodiments, this utility model may also use other types of buckle assemblies, such as folding buckles, sliding buckles, magnetic buckles, etc.

[0087] See Figure 4 In order to convert the pulse current generated by the piezoelectric layer 202 into a storable or usable DC current, in some specific embodiments, the conversion power supply circuit 102 proposed by this utility model includes a piezoelectric conversion circuit 1021, a voltage regulator circuit 1022, a rectifier filter circuit 1023 and a boost circuit 1024 connected in sequence from the input end to the output end.

[0088] Specifically, the input terminal of the piezoelectric conversion circuit 1021 is electrically connected to the output terminal of the piezoelectric layer 202, and is used to convert the electrical energy generated by the piezoelectric layer 202 into direct current.

[0089] In some embodiments, the piezoelectric conversion circuit 1021 includes a first capacitor C1, and a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4 constituting a rectifier bridge.

[0090] In this circuit, the cathodes of the first diode D1 and the third diode D3 are electrically connected to the output terminal of the piezoelectric layer 202, and the anodes of the first diode D1 and the third diode D3 are grounded; the anodes of the second diode D2 and the fourth diode D4 are electrically connected to the output terminal of the piezoelectric layer 202, and the cathodes of the second diode D2 and the fourth diode D4 are electrically connected to the first terminal of the first capacitor C1, and the second terminal of the first capacitor C1 is grounded; the two ends of the first capacitor C1 are electrically connected to the input terminal of the voltage regulator circuit 1022.

[0091] In the piezoelectric conversion circuit 1021, the rectifier bridge composed of four diodes is a full-wave rectifier, which aims to obtain a rectification efficiency of more than 80%. The pulse current generated by the piezoelectric layer 202 is converted into DC current by the rectifier bridge and stored in the first capacitor C1.

[0092] Furthermore, the voltage regulator circuit 1022 is used to stabilize the voltage of the DC power output by the piezoelectric converter circuit 1021, and the input terminal of the voltage regulator circuit 1022 is electrically connected to the output terminal of the piezoelectric converter circuit 1021.

[0093] In some embodiments, the voltage regulator circuit 1022 includes a second capacitor C2, a linear regulator CW, and a third capacitor C3.

[0094] The second capacitor C2 is connected in parallel with the first capacitor C1; the two ends of the second capacitor C2 are electrically connected to the input terminal of the linear regulator CW, and the output terminal of the linear regulator CW is electrically connected to the two ends of the third capacitor C3; the two ends of the third capacitor C3 are electrically connected to the input terminal of the rectifier filter circuit 1023.

[0095] The voltage regulator circuit 1022 is a positive linear voltage regulator circuit; in one embodiment, the linear regulator CW is selected as a 7805 three-terminal regulator.

[0096] Furthermore, the rectifier-filter circuit 1023 is used to rectify and filter the current output by the voltage regulator circuit 1022.

[0097] In some embodiments, the rectifier filter circuit 1023 includes a fourth capacitor C4 and a fifth diode D5.

[0098] The fourth capacitor C4 is connected in parallel with the third capacitor C3. The first terminal of the fourth capacitor C4 is electrically connected to the cathode of the fifth diode D5, and the second terminal of the fourth capacitor C4 is grounded. The fifth diode D5 is connected to the input terminal of the boost circuit 1024.

[0099] Furthermore, the boost circuit 1024 is used to convert the voltage output by the rectifier filter circuit 1023 into the preset charging voltage of the energy storage module 103, and the output terminal of the boost circuit 1024 is electrically connected to the energy storage module 103.

[0100] The preset charging voltage of the energy storage module 103 refers to the standard charging voltage of the energy storage module 103 or the charging voltage that enables effective charging.

[0101] In some embodiments, the boost circuit 1024 includes a first inductor L1, a first transistor Q1, a sixth diode D6, and a fifth capacitor C5.

[0102] The first terminal of the first inductor L1 is electrically connected to the anode of the fifth diode D5, and the second terminal of the first inductor L1 is electrically connected to the collector of the first transistor Q1, while the emitter of the first transistor Q1 is grounded. The second terminal of the first inductor L1 is also electrically connected to the anode of the sixth diode D6, and the cathode of the sixth diode D6 is electrically connected to the first terminal of the fifth capacitor C5, while the second terminal of the fifth capacitor C5 is grounded. The two terminals of the fifth capacitor C5 are the output terminals of the boost circuit 1024.

[0103] In the boost circuit 1024, the fifth capacitor C5 is used to store charge, the sixth diode D6 is used to prevent current backflow, the first inductor L1 is used for charging and discharging, and the first transistor Q1 is used as a switch to control the charging and discharging of the first inductor L1. When discharging, the energy stored in the first inductor L1 is released to the fifth capacitor C5 through the sixth diode D6, thereby increasing the voltage.

[0104] In some implementations, the first transistor Q1 may be an NPN transistor.

[0105] In some embodiments, the power conversion circuit 102 may also integrate a battery charging management unit 1025.

[0106] The battery charging management unit 1025 can precisely control the output voltage of the boost circuit 1024 by controlling the base of the first transistor Q1, so as to ensure that the energy storage module 103 is charged within a feasible and safe voltage range.

[0107] In some implementations, the battery charging management unit 1025 may also integrate functions such as power monitoring, battery protection, and charging mode control to ensure that the piezoelectric layer 202 can charge the energy storage module 103 safely and efficiently.

[0108] As can be seen from the above, the embodiments of this utility model integrate a flexible piezoelectric layer into a flexible wristband. When the user moves, the piezoelectric layer can convert the mechanical energy generated at various points on the flexible wristband into electrical energy to power the smart wearable device, thereby improving the battery life of the smart wearable device. Based on this, the embodiments of this utility model also select and design the materials of each layer of the flexible wristband to improve the piezoelectric generation efficiency while maintaining the durability, wearing comfort, and portability of the flexible wristband; the connection structure between the flexible wristband and the device body of the smart wearable device features a quick-release design with spring pins and buckle components, ensuring stable mechanical and electrical connections between the flexible wristband and the device body; and a specific circuit structure design is implemented for the power conversion circuit to ensure that the pulse current generated by the piezoelectric layer can be efficiently and safely converted into DC power suitable for storage. Therefore, the embodiments of this utility model provide a comprehensive solution for long battery life of smart wearable devices, which is of great significance for the product technology development and market expansion of smart wearable devices such as smartwatches and smart bracelets.

[0109] It should be noted that the flexible wristbands provided in the above embodiments can be used for wrist wear to power common wrist-worn devices such as smartwatches or smart bracelets, for head and neck wear to power virtual reality and augmented reality smart glasses, for lower limb wear to power lower limb exoskeletons or smart insoles, and for wearing on the torso to power smart clothing, full-body exoskeletons, or small electronic devices such as electronic blood glucose meters or electrocardiogram monitors mounted on the torso. Depending on the application scenario, the dimensions of each layer in the flexible wristband can be specifically designed according to actual needs. The flexible wristband can also be replaced with various different terms such as flexible waistband, flexible piezoelectric energy harvesting device, human motion energy harvesting device, etc., but the essence of these terms does not depart from the spirit and scope of the technical solutions of the embodiments of this application.

[0110] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A long-battery-life smart wearable device, characterized in that, Includes the device itself and the flexible wristband; The device body includes a housing, and an energy storage module and a power conversion circuit disposed inside the housing; the power conversion circuit is electrically connected to the piezoelectric layer of the flexible wristband, and is used to convert the electrical energy generated by the piezoelectric layer into direct current and store it in the energy storage module; The flexible wristband includes: a support layer and piezoelectric layers disposed on both sides of the support layer; both the support layer and the piezoelectric layers are made of flexible materials. The conversion power supply circuit includes a piezoelectric conversion circuit, a voltage regulator circuit, a rectifier filter circuit, and a boost circuit that are connected in sequence from the input terminal to the output terminal of the conversion power supply circuit. The piezoelectric conversion circuit includes a first capacitor, and a first diode, a second diode, a third diode, and a fourth diode that form a rectifier bridge; The cathodes of the first diode and the third diode are electrically connected to the output terminal of the piezoelectric layer, and the anodes of the first diode and the third diode are grounded; the anodes of the second diode and the fourth diode are electrically connected to the output terminal of the piezoelectric layer, and the cathodes of the second diode and the fourth diode are electrically connected to the first terminal of the first capacitor, and the second terminal of the first capacitor is grounded; the two ends of the first capacitor are electrically connected to the input terminal of the voltage regulator circuit. The voltage regulator circuit includes a second capacitor, a linear regulator, and a third capacitor; The second capacitor is connected in parallel with the first capacitor; the two ends of the second capacitor are electrically connected to the input terminal of the linear regulator, and the output terminal of the linear regulator is electrically connected to the two ends of the third capacitor; the two ends of the third capacitor are electrically connected to the input terminal of the rectifier filter circuit. The rectifier filter circuit includes a fourth capacitor and a fifth diode; The fourth capacitor is connected in parallel with the third capacitor. The first terminal of the fourth capacitor is electrically connected to the cathode of the fifth diode, and the second terminal of the fourth capacitor is grounded. The fifth diode is connected to the input terminal of the boost circuit. The boost circuit includes a first inductor, a first transistor, a sixth diode, and a fifth capacitor; The first end of the first inductor is electrically connected to the anode of the fifth diode, the second end of the first inductor is electrically connected to the collector of the first transistor, and the emitter of the first transistor is grounded; the second end of the first inductor is also electrically connected to the anode of the sixth diode, the cathode of the sixth diode is electrically connected to the first end of the fifth capacitor, and the second end of the fifth capacitor is grounded; the two ends of the fifth capacitor are the output terminals of the boost circuit.

2. The long-battery-life smart wearable device according to claim 1, characterized in that, The piezoelectric layer is made of at least one of organic piezoelectric polymer, flexible piezoelectric ceramic, and piezoelectric ceramic composite material; The support layer is made of polymer or carbon fiber composite material.

3. The long-battery-life smart wearable device according to claim 1, characterized in that, Also includes: A flexible protective layer is applied to the surface of the piezoelectric layer.

4. The long-battery-life smart wearable device according to claim 1, characterized in that, The flexible wristband has a first end and a second end in the length direction, and each side of the first end has at least one first spring pin. The support layer is provided with conductive lines, and the first spring PIN is electrically connected to the piezoelectric layer through the conductive lines.

5. The long-battery-life smart wearable device according to claim 4, characterized in that, The flexible wristband is equipped with a sensor; The first end of the flexible wristband is also provided with a second spring pin; the second spring pin is electrically connected to the signal output terminal of the sensor.

6. The long-battery-life smart wearable device according to claim 1, characterized in that, The housing is provided with a connection slot; The inner wall of the connection slot is provided with multiple PIN holes; at least two opposite PIN holes are provided with contacts that are electrically connected to the conversion power supply circuit.

7. The long-battery-life smart wearable device according to claim 6, characterized in that, The housing contains a processor, and at least one pin hole contains a contact that is electrically connected to the processor.

8. The long-battery-life smart wearable device according to any one of claims 1-7, characterized in that, The long-battery-life smart wearable device is a smartwatch or a smart bracelet.

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