Patent Publication Number: US-2023148716-A1

Title: Wearable device and wearable system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Application No. 202022485052.6, filed with the China National Intellectual Property Administration on Oct. 31, 2020 and entitled “Wearable Device and Wearable System”, which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to the field of wearable technologies, and specifically to a wearable device and a wearable system. 
     BACKGROUND 
     A conventional wearable device is usually charged in a wired manner, which requires a user to carry a charger around. In a case that the charger is not carried, the wearable device may not work properly caused by a dead or low battery. 
     SUMMARY 
     The present disclosure provides a wearable device and a wearable system. The wearable device can be charged without using a charger, which improves convenience of use of the wearable device. 
     According to a first aspect, the present disclosure provides a wearable system, including a wearable device and an electronic device. The wearable device includes an annular-shaped wearing member and a first coil. The annular-shaped wearing member includes an outer annular surface, the first coil is accommodated inside the annular-shaped wearing member, and a laying surface of the first coil is arranged along a circumferential direction of the annular-shaped wearing member. The electronic device includes a second coil. 
     In a case that the outer annular surface partially abuts against the electronic device, the first coil and the second coil are disposed opposite to each other, and the first coil and the second coil that are in an energized state generate magnetic field lines in a same direction. 
     When a user is wearing the wearable device, the user does not need to remove the wearable device, but instead, may directly allow the outer annular surface of the annular-shaped wearing member to partially abut against the electronic device, so that the first coil is disposed opposite to the second coil. The second coil in the energized state generates an alternating magnetic field, and the first coil senses the alternating magnetic field of the second coil, to generate an induced current. This realizes the charging of the wearable device, thereby improving the convenience of use of the wearable device. 
     The annular-shaped wearing member refers to that the wearing member is in the annular shape when the wearable device is worn on a user&#39;s body. In other words, the wearing member may be in the annular shape, or may be spread in a plate shape, when the wearable device is not worn on a user&#39;s body. 
     The laying surface of the first coil refers to a mounting surface of the first coil. 
     In an embodiment, a winding center of the first coil passes through the outer annular surface, so that the first coil can sense the magnetic field lines passing through the laying surface of the first coil. When the wearable device is worn on a user&#39;s body, it can be charged without being removed, which enhances a battery life of the wearable device, thereby improving the convenience of use of the wearable device. 
     In an embodiment, the electronic device includes a rear cover. The second coil is mounted to an inner side of the rear cover. A winding center of the second coil is perpendicular to the rear cover, to radiate magnetic field lines outward passing through the rear cover. 
     In an embodiment, in a case that the outer annular surface partially abuts against the electronic device, the first coil is disposed opposite to the second coil, and the winding center of the first coil is parallel or coincident with the winding center of the second coil, so that electromagnetic induction can be generated between the first coil and the second coil. 
     According to a second aspect, the present disclosure provides a wearable device, including an annular-shaped wearing member and a first coil. The first coil is accommodated inside the annular-shaped wearing member. A laying surface of the first coil is arranged along a circumferential direction of the annular-shaped wearing member. The first coil is configured to sense magnetic field lines passing through the laying surface of the first coil, to generate an induced current. The wearable device can be charged without a charger, which improves the convenience of use of the wearable device. 
     In an embodiment, the annular-shaped wearing member includes an outer annular surface. A winding center of the first coil passes through the outer annular surface, so that the first coil can sense the magnetic field lines passing through the laying surface of the first coil. 
     When a user is wearing the wearable device, the user does not need to remove the wearable device, but instead, may directly allow the outer annular surface of the annular-shaped wearing member to partially abut against the electronic device, so that the first coil is disposed opposite to a power supply coil of an external power supply device. The first coil can sense the magnetic field lines passing through the laying surface of the first coil, so as to realize the charging of the wearable device, thereby improving the convenience of use of the wearable device. 
     In an embodiment, the wearable device further includes a power supply and a magnetic isolation sheet. The power supply and the magnetic isolation sheet are accommodated inside the annular-shaped wearing member. The power supply is electrically connected to the first coil, and is located at an inner side of the magnetic isolation sheet. The first coil is located at an outer side of the magnetic isolation sheet. 
     A conventional power supply generally has a metal case. Therefore, in response to receiving an electromagnetic wave generated by the first coil, the metal case of the power supply generates an eddy current, and thereby generating an electromagnetic wave in the opposite direction to the electromagnetic wave of the first coil. As a result, the electromagnetic wave of the first coil is weakened, which causes reduction in the induced current of the first coil, thereby impairing the charging effect. 
     The magnetic isolation sheet can isolate the first coil from the metal case, to isolate attenuation and interference of the metal case of the power supply to the magnetic field of the first coil, which prevents energy waste, thereby improving the charging efficiency of the first coil. 
     In an embodiment, the laying surface of the first coil is an outer surface of the magnetic isolation sheet, that is, the isolation sheet supports and fixes the first coil. The first coil is formed by winding a wire along an edge of the outer surface of the magnetic isolation sheet, to form a relatively large coil inside the annular-shaped wearing member, which is advantageous for forming a relatively large magnetic induction loop. As such, a relatively larger number of magnetic field lines pass through the first coil, to generate a relatively large magnetic flux, and thereby generating a relatively large induced current. This helps to enhance the charging efficiency of the wearable device. 
     In an embodiment, the wearable device further includes an auxiliary circuit board. The auxiliary circuit board is electrically connected to the first coil. The magnetic isolation sheet is mounted to an inner surface of the auxiliary circuit board. The laying surface of the first coil is an outer surface of the auxiliary circuit board. That is, the auxiliary circuit board supports and fixes the first coil. The auxiliary circuit board the first coil is formed by winding a wire along an edge of the outer surface of the auxiliary circuit board, to form a relatively large coil inside the annular-shaped wearing member, which is advantageous for forming a relatively large magnetic induction loop. As such, a relatively larger number of magnetic field lines pass through the first coil, to generate a relatively large induced current. This helps to enhance the charging efficiency of the wearable device. 
     In an embodiment, a projection of the first coil on the inner surface of the auxiliary circuit board is at least partially located within a projection of the magnetic isolation sheet on the inner surface of the auxiliary circuit board. That is, the projection of the magnetic isolation sheet on the inner surface of the auxiliary circuit board at least partially covers the projection of the first coil on the inner surface of the auxiliary circuit board, to ensure that the isolation sheet can isolate the first coil from the metal case of the power supply. 
     In an embodiment, the annular-shaped wearing member includes a charging portion. The charging portion is made of a non-metallic material. The first coil is configured to sense the magnetic field lines via the charging portion. 
     It should be understood that, the first coil transfers energy by using the principle of alternating electromagnetic field induction. Therefore, the charging portion made of the non-metallic material effectively ensures that the first coil can sense the magnetic field lines, thereby realizing the charging of the wearable device. 
     In an embodiment, the outer annular surface is provided with a wearing identification, to identify a wearing position of the annular-shaped wearing member  10 . A projection of the first coil on the outer annular surface covers the wearing identification, or, a projection of the first coil on the outer annular surface is disposed opposite to the wearing identification. That is, a position of the first coil can be determined according to the wearing identification. A user can freely choose a placing position of the first coil when wearing the wearable device, to facilitate the charging of the wearable device with the first coil. 
     In an embodiment, the annular-shaped wearing member includes a first housing and a second housing fixedly connected to each other. The first housing and the second housing are enclosed to form an accommodation cavity. The accommodation cavity is configured to accommodate the first coil. 
     In an embodiment, the wearable device further includes a circuit board and a functional component. The circuit board is electrically connected to the first coil. The functional component is mounted to the circuit board, and is electrically connected to the circuit board, to realize functional diversity of the wearable device. 
     The circuit board is electrically connected to the power supply, and the first coil is electrically connected to the power supply via the circuit board. 
     In an embodiment, the functional component is mounted to an inner surface of the circuit board. 
     The circuit board can buffer an external force received by the functional component when the wearable device is worn on a user&#39;s body. That is, the circuit board can protect the functional component. 
     In an embodiment, the wearable device is a ring. 
     It should be noted that, a ring has a relatively small size, which only allows a small space inside the annular-shaped wearing member for placing the power supply, therefore the power supply has a small capacity. When using the wearable device, a user needs to charge the power supply several times a day, which causes an inconvenience to the user. The wearable device according to the embodiments of the present disclosure can be charged without being removed, which overcomes this inconvenience, thereby improving user experience of the wearable device. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       To describe the technical solutions in the embodiments of the present disclosure or the conventional technology more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the conventional technology. 
         FIG.  1    is a schematic structural diagram of a wearable system according to an embodiment of the present disclosure. 
         FIG.  2    is a schematic diagram of a module structure of a wearable device in the wearable system shown in  FIG.  1   . 
         FIG.  3    is a partially exploded view of a wearable device in the wearable system shown in  FIG.  1   . 
         FIG.  4    is a schematic cross-sectional view of a wearable device in the wearable system shown in  FIG.  1    sectioned along an I-I direction. 
         FIG.  5    is a schematic structural diagram of a wearable device in the wearable system shown in  FIG.  1    according to an embodiment. 
         FIG.  6    is a schematic structural diagram of a wearable device in the wearable system shown in  FIG.  1    according to another embodiment. 
         FIG.  7    is a schematic structural diagram of the wearable system shown in  FIG.  1    in another state. 
         FIG.  8    is a schematic cross-sectional view of the wearable system shown in  FIG.  7    sectioned along an II-II direction. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The technical solutions in the embodiments of the present disclosure are described below with more details with reference to the accompanying drawings. 
       FIG.  1    is a schematic structural diagram of a wearable system  1000  according to an embodiment of the present disclosure.  FIG.  2    is a schematic diagram of a module structure of a wearable device  100  in the wearable system  1000  shown in  FIG.  1   . 
     The wearable system  1000  includes the wearable device  100  and an electronic device  200 . The wearable device  100  is in a communicative connection with the electronic device  200 . In this embodiment, the wearable device  100  establishes the communicative connection with the electronic device  200  in a wireless manner. In some other embodiments, the wearable device  100  establishes the communicative connection with the electronic device  200  in a wired manner. 
     The wearable device  100  may be a wearable electronic product, such as a watch, a smart watch, a wristband, a smart wristband, a pair of augmented reality (augmented reality, AR) glasses, an AR helmet, a pair of virtual reality (virtual reality, VR) glasses, a VR helmet, an electronic health testing device, a belt, a waist belt, a bracelet, an anklet, a necklace, a ring, and so on, or an ornament. In this embodiment of the present disclosure, as an example, the wearable device  100  is a ring. 
     In this embodiment, the wearable device  100  is a smart ring, which can realize various functions by various embedded functional components. The wearable device  100  may include an annular-shaped wearing member  10 , a power supply  20 , a processor  30 , a wireless transceiver  40 , an inertial sensor  50 , and a physiological sensor  60 . The annular-shaped wearing member  10  is a finger ring, and is in an annular shape. The annular-shaped wearing member  10  includes an inner annular surface  101  and an outer annular surface  102  that are disposed opposite to each other. When a user is wearing the wearable device  100 , the inner annular surface  101  of the annular-shaped wearing member  10  provides a good fit to the skin of the users&#39; finger, and the outer annular surface  102 , as an exterior appearance of the wearable device  100 , is exposed relative to the user&#39;s finger. The annular-shaped wearing member  10  being in the annular shape refers to that the annular-shaped wearing member  10  is in the annular shape when the wearable device  100  is worn on the user&#39;s body. In other words, the annular-shaped wearing member  10  may be in the annular shape, or may be spread in a plate shape, when the wearable device  100  is not worn on the user&#39;s body. It should be understood that, the annular-shaped wearing member  10  is not limited to the circular annular shape as shown in  FIG.  1   , and alternatively, the annular-shaped wearing member  10  may be in a rectangular annular shape or any other special-shaped annular shape. 
     It should be noted that, orientation terms such as “inside” and “outside” for describing the wearable device  100  in the embodiments of the present disclosure are merely used with reference to a state where the wearable device  100  is worn on the user&#39;s finger. The term “inside” means a side close to the user&#39;s finger, and the term “outside” means a side away from the user&#39;s finger. These terms do not indicate or imply that an apparatus or element referred to need to have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present disclosure. 
     The power supply  20 , the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60  are all accommodated inside the annular-shaped wearing member  10 . That is, the power supply  20 , the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60  are all located between the inner annular surface  101  and the outer annular surface  102  of the annular-shaped wearing member  10 , to maintain the integrity of the appearance of the wearable device  100 , thereby improving the beauty of the appearance of the wearable device  100 . The power supply  20  is electrically connected with the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60 , and is configured to provide power supply to the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60 . The power supply  20  may be a lithium battery or any other energy storage component. 
     The wireless transceiver  40  is electrically connected to the processor  30 , and is configured to receive a signal sent by the electronic device  200 , and/or, send a signal to the electronic device  200 . That is, the wearable device  100  establishes the communicative connection with the electronic device  200  via the wireless transceiver  40 . The wireless transceiver  40  is a Bluetooth module, a WIFI module, or any other wireless communication module which can communicate with the electronic device  200 . It should be understood that, the electronic device  200  may be an electronic product, such as a smartphone, a tablet computer, a personal digital assistant (personal digital assistant, PDA), a mobile internet device (mobile internet device, MID), a smart wearable device, and so on. In this embodiment of the present disclosure, as an example, the electronic device  200  is a mobile phone. 
     It should be noted that, the term “and/or” in the embodiments of the present disclosure is merely association relationships for describing associated objects, which indicates that there may exist three types of relationships. For example, A and/or B may indicate: A exists alone, A and B exist at the same time, and B exists alone. The “and/or” in the following description may have the same meaning. 
     The inertial sensor  50  is electrically connected to the processor  30 , and is configured to detect an action of a finger (such as bending or shaking the finger) wearing the wearable device  100 , convert a detected finger action into a finger motion signal, and send a detected finger motion signal to the processor  30 . The inertial sensor  50  may include a three-axis acceleration sensor, and/or a three-axis angular velocity sensor, and/or a three-axis magnetic sensor, or any other type of inertial sensor  50  which can detect the action of the finger wearing the wearable device  100 . The three-axis acceleration sensor is configured to detect a change in a finger motion state; the three-axis angular velocity sensor is configured to detect a change in a finger motion gesture; and the three-axis magnetic sensor is configured to detect a finger pointing direction and its change. According to the changes in the finger motion state and the finger motion gesture, the finger action can be recognized, and content written with the finger can also be recognized. It should be understood that, according to the finger pointing direction when the finger is making an action, an electronic device to be controlled by the finger can be distinguished and controlled, in a case that the wearable device  100  is connected to a plurality of electronic devices at the same time. 
     The processor  30  is configured to receive the finger motion signal sent by the inertial sensor  50 , recognize the finger action according to the finger motion signal, generate a corresponding control instruction according to a recognized finger action, and send the control instruction to the electronic device  200  via the wireless transceiver  40 , in order to control the electronic device  200  to process business. For example, the electronic device  200  is controlled to turn on or off; alternatively, the electronic device  200  is controlled to perform audio services such as media and calls; alternatively, the electronic device  200  is controlled to process some other data services. The audio services may include media services, such as playing music, recordings, sounds in video files, background music in games, and incoming call prompts for users. 
     The physiological sensor  60  may be exposed relative to the outer annular surface  102  of the annular-shaped wearing member  10 , and is electrically connected to the processor  30 . The physiological sensor  60  is configured to monitor physiological indicator information of a wearer of the wearable device  100 , such as a heart rate, a pulse, a blood pressure, a blood oxygen, and so on, and send it to the electronic device  200  via the wireless transceiver  40 . An application program of the electronic device  200  may store the relevant physiological indicator information in a cloud through a network, which is convenient for users to access data via different networked smart terminals. 
     It should be understood that, the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60  are all functional components of the wearable device  100 . In some other embodiments, the wearable device  100  may include other functional components, such as a display screen or a near field communication (near field communication, NFC) chip. In this case, the display screen is electrically connected to the processor  30 , and is configured to display information, such as displaying a date, a time, or a weather, and/or, the physiological indicator information such as the wearer&#39;s heart rate, pulse, blood pressure, and blood oxygen, to facilitate users to observe or query information. The NFC chip is electrically connected to the processor  30 , for realizing a payment function of the wearable device  100 . For example, the NFC chip may virtualize a transportation card or a bank card of a wearer, so that when the wearer takes public transport to office or goes shopping, transaction settlement can be made by using the NFC chip and an external NFC terminal. There is no need for the wearer to carry the transportation card or the bank card, thereby improving the wearer&#39;s experience. 
       FIG.  3    is a partially exploded view of the wearable device  100  in the wearable system  1000  shown in  FIG.  1   .  FIG.  4    is a schematic cross-sectional view of the wearable device  100  in the wearable system shown in  FIG.  1    sectioned along an I-I direction. Being “sectioned along an I-I direction” refers to being sectioned along a plane where the I-I line is located, and the following related description may have the same meaning. 
     The annular-shaped wearing member  10  has a central axis O-O. The central axis O-O of the annular-shaped wearing member  10  refers to that the annular-shaped wearing member  10  is symmetric with respect to the central axis O-O. Specifically, the annular-shaped wearing member  10  includes a first housing  11  and a second housing  12 . The first housing  11  and the second housing  12  are fixedly connected to each other, and enclose to form an accommodation cavity  110 . The accommodation cavity  110  is configured to accommodate the power supply  20 , the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60 . Exemplarily, the first housing  11  and the second housing  12  may be fixedly connected to each other by means of adhesion. 
     The first housing  11  includes a main body portion  111  and a fixing portion  112  that are fixedly connected to each other. The main body portion  111  and the fixing portion  112  are both in a circular annular shape. Specifically, the fixing portion  112  is fixedly connected to an end of the main body portion  111 , and extends from an inner surface in a direction toward an outer surface of the main body portion  111 . The inner surface of the main body portion  111  is the inner annular surface  101  of the annular-shaped wearing member  10 . Exemplarily, the first housing  11  is a structural component that is integrally formed by the main body portion  111  and the fixing portion  112 . 
     The second housing  12  includes a main body portion  121  and a fixing portion  122  fixedly connected to each other. The main body portion  121  and the fixing portion  122  are both in a circular annular shape. Specifically, the main body portion  121  of the second housing  12  and the main body portion  111  of the first housing  11  are disposed in parallel and spaced apart. An end of the main body portion  121  of the second housing  12  is fixedly connected to the fixing portion  112  of the first housing  11 . The fixing portion  122  of the second housing  12  is fixedly connected to the other end of the main body portion  121 , and is disposed in parallel and spaced apart with the fixing portion  112  of the first housing  11 . In this case, the fixing portion  122  of the second housing  12  extends from an inner surface of the main body portion  121  in a direction facing away from an outer surface. The outer surface of the main body portion  121  of the second housing  12  is the outer annular surface  102  of the annular-shaped wearing member  10 . Exemplarily, the second housing  12  is a structural component that is integrally formed by the main body portion  121  and the fixing portion  122 . 
     In addition, a surface of the fixing portion  122  of the second housing  12  facing the fixing portion  112  of the first housing  11  partially protrudes, to form an extension portion  123 . Specifically, the extension portion  123  is located at one end of the fixing portion  122  of the second housing  12  away from the main body portion  121 . The extension portion  123  is provided with a fixing groove  124 , and an opening of the fixing groove  124  is located on a surface of the extension portion  123  facing away from the fixing portion  121 . In this case, an end of the main body portion  111  of the first housing  11  facing away from the fixing portion  112  is fixedly connected to a groove wall of the fixing groove  124 . 
     The wearable device  100  also includes a circuit board  70 , a magnetic isolation sheet  80 , and a first coil  90 . The circuit board  70 , the magnetic isolation sheet  80 , and the first coil  90  are all accommodated inside the annular-shaped wearing member  10 . That is, the circuit board  70 , the magnetic isolation sheet  80 , and the first coil  90  are all accommodated in the accommodation cavity  110 . The circuit board  70  carries the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60 . That is, the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60  may all be integrated on the circuit board  70 . 
     The circuit board  70  includes an inner surface  701  and an outer surface  702  that are disposed opposite to each other. The processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60  are all mounted on the inner surface  701  of the circuit board  70 . During the use of the wearable device  100 , the circuit board  70  can buffer an external force received by the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60 . That is, the circuit board  70  can protect the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60 , to prevent them from being damaged due to the external force, thereby prolonging a service life of the wearable device  100 . 
     In addition, the circuit board  70  is a polyline-shaped board body, and is adapted to the shape of the annular-shaped wearing member  10 . Exemplarily, the circuit board  70  is a rigid-flex board. This ensure that it not only has a certain flexibility enabling itself to be bent into the polyline shape, thereby being adapted to the shape of the annular-shaped wearing member  10 , but also has a certain rigidity enabling to support the functional components, such as the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60 . In some other embodiments, the circuit board  70  may be an arc-shaped board body or any other special-shaped board body. 
     In this embodiment, the circuit board  70  is fixedly connected to the inner surface of the main body portion  121  of the second housing  12 . Exemplarily, the circuit board  70  may be fixedly connected to the inner surface of the second housing  12  by means of adhesion. In this case, the wearable device  100  may further include an adhesive layer  70   a.  The adhesive layer  70   a  is connected between the outer surface  702  of the circuit board  70  and the inner surface of the main body portion  122  of the second housing  12 . 
     In some other embodiments, the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60  may be mounted on the outer surface  702  of the circuit board  70 . In this case, the circuit board  70  may be fixed to the outer surface of the main body portion  111  of the first housing  11 . The adhesive layer  70   a  is connected between the inner surface  701  of the circuit board  70  and the outer surface of the main body portion  111  of the first housing  11 . 
     In this embodiment, the magnetic isolation sheet  80  is an arc-shaped plate body, and is adapted to the shape of the annular-shaped wearing member  10 . Specifically, the magnetic isolation sheet  80  is fixedly connected to the circuit board  70 , and is enclosed with the circuit board  70  to be an approximately circular annular-shaped plate body. In this case, the circular annular-shaped plate body is adapted to the shape of the annular-shaped wearing member  10 . The magnetic isolation sheet  80  includes an outer surface  801 . The outer surface  801  of the magnetic isolation sheet  80  is arranged along a circumferential direction of the annular-shaped wearing member  10 . That is, the outer surface  801  of the magnetic isolation sheet  80  is disposed around the central axis O-O of the annular-shaped wearing member  10 . Exemplarily, the outer surface  801  of the magnetic isolation sheet  80  is a circular arc surface, and a central axis of the outer surface  801  of the magnetic isolation sheet  80  is coincident with the central axis O-O of the annular-shaped wearing member  10 . 
     The power supply  20  is located at an inner side of the magnetic isolation sheet  80 , and is electrically connected to the circuit board  70 . As such, the power supply  20  is electrically connected to the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60  via the circuit board  70 , to power the processor  30 , the wireless transceiver  40 , the inertial sensor  50 , and the physiological sensor  60 . Exemplarily, the power supply  20  may be electrically connected to the circuit board  70  via a connecting circuit board  20   a.  In this embodiment, the power supply  20  is in a shape of an arc-shaped plate, and is adapted to the shape of the magnetic isolation sheet  80 . During the use of the wearable device  100 , the magnetic isolation sheet  80  can buffer an external force received by the power supply  20 . That is, the magnetic isolation sheet  80  can protect the power supply  20 , to prevent the power supply  20  from being damaged due to the external force, thereby prolonging the service life of the wearable device  100 . 
     The power supply  20  is fixedly connected to the outer surface of the main body portion  111  of the first housing  11 . Exemplarily, the power supply  20  may be fixedly connected to the outer surface of the main body portion  111  of the first housing  11  by means of adhesion. In this case, the wearable device  100  may further include an adhesive layer  20   b.  The adhesive layer  20   b  is connected between the inner surface of the power supply  20  and the outer surface of the main body portion  111  of the first housing  11 . 
     It should be understood that, most functional components of the wearable device  100  are carried on the circuit board  70 , that is, most functional components are located on the same side of the wearable device  100  as the circuit board  70 . Therefore, the power supply  20  and the magnetic isolation sheet  80  are located on the other side of the wearable device  100 , which can ensure overall gravitational balance of the wearable device  100 , thereby improving user comfort when wearing the wearable device  100 . 
     The first coil  90  is located at an outer side of the magnetic isolation sheet  80 , and is electrically connected to the power supply  20 . In this embodiment, the first coil  90  has a forward charging mode. In the forward charging mode, the first coil  90  is configured to sense the magnetic field lines passing through a laying surface of the first coil  90 , to generate an induced current. The power supply  20  is configured to receive the induced current of the first coil  90 , so as to achieve charging. The laying surface of the first coil  90  is arranged along a circumferential direction of the annular-shaped wearing member  10 . That is, the laying surface of the first coil  90  is disposed around the central axis O-O of the wearable device  10 . It should be understood that, the laying surface of the first coil  90  refers to a mounting surface of the first coil  90 . In some other embodiments, the first coil  90  may have a reverse charging mode. In the reverse charging mode, under the action of an alternating current provided by the power supply  20 , the first coil  90  generates an alternating magnetic field, namely radiating alternating magnetic field lines outward, to charge an external device. 
       FIG.  5    is a schematic structural diagram of the wearable device  100  in the wearable system  1000  shown in  FIG.  1    according to an embodiment. 
     In this embodiment, the outer surface  801  of the magnetic isolation sheet  80  is the laying surface of the first coil  90 . Specifically, the first coil  90  is mounted to the outer surface  801  of the magnetic isolation sheet  80 , and is electrically connected to the circuit board  70 , so as to be electrically connected to the power supply  20  via the circuit board  70 . In other words, the first coil  90  is located at the outer side of the magnetic isolation sheet  80 , to facilitate electromagnetic induction with an external wireless power supply device. The first coil  90  receives an energy of the power supply device and output the energy, to allow the power supply  20  to receive and store the energy outputted by the first coil  90 , namely realizing charging the power supply  20 , thereby enhancing a battery life of the wearable device  100 . In this case, the first coil  90  and the magnetic isolation sheet  80  form a wireless charging module of the wearable device  100 . The wireless charging module may be fixedly connected to an outer surface of the power supply  20  or the inner surface of the main body portion  121  (as shown in  FIG.  4   ) of the second housing  12 . Exemplarily, the wireless charging module may be fixedly connected to the outer surface of the power supply  20  or the inner surface of the main body portion  121  of the second housing  12  by means of adhesion. 
     In addition, the circuit board  70  may be provided with a power supply management module. The power supply management module is connected between the power supply  20  and the first coil  90 , to realize the electrical connection between the first coil  90  and the power supply  20 . Exemplarily, the power supply management module may include a charging circuit, a voltage drop regulation circuit, a protection circuit, and an electrical measurement circuit. The charging circuit is electrically connected to the first coil  90 , to receive an electrical signal inputted from an external power supply apparatus via the first coil  90 . The voltage drop regulation circuit is electrically connected to the charging circuit and the power supply  20 , so that the electrical signal inputted by the charging circuit may be undergone voltage transformation and then outputted to the power supply  20 , to complete the charging of the power supply  20 ; in addition, an electrical signal outputted by the power supply  20  may be undergone voltage transformation and then outputted to the other functional components of the wearable device  100 , to provide power supply to the other functional components of the wearable device  100 . The protection circuit may be configured to prevent the power supply  20  from overcharge, over-discharge, short circuit, or over-current. In addition, the battery management module may be configured to monitor a capacity of the power supply  20 , the number of cycles of the power supply  20 , a health status of the power supply  20  (leakage, impedance) and other parameters. In some other embodiments, the wearable device  100  may include a charging interface. The charging interface is electrically connected to the power supply  20  via the circuit board  70 , to realize the charging of the power supply  20 . 
     It should be noted that, a conventional power supply generally has a metal case. Therefore, the magnetic isolation sheet  80  can not only support and pre-fix the first coil  90 , but also isolate the first coil  90  from the metal case of the power supply  20 , to prevent the metal case of the power supply  20  from generating an eddy current in response to receiving an electromagnetic signal generated by the first coil  90 , and thereby generating an electromagnetic signal in an opposite direction to an electromagnetic wave of the first coil  90 . The electromagnetic signal generated by the metal case of the power supply  20  will weaken the electromagnetic wave of the first coil  90 , which results in reduction of the induced current of the first coil  90 , thereby impairing the charging effect. Therefore, the magnetic isolation sheet  80  can reduce attenuation and interference of the metal case of the power supply  20  to the magnetic field of the first coil  90 , which plays a role of isolating metal. This can reduce energy waste, thereby improving the charging efficiency of the first coil  90 . 
     In this embodiment, a winding center C-C of the first coil  90  passes through the outer annular surface  102  of the annular-shaped wearing member  10 . Specifically, the first coil  90  is formed by winding a wire along an edge of the outer surface  801  of the magnetic isolation sheet  80 . The winding center C-C of the first coil  90  refers to a center around which the wire is wound. That is, the wire is wound around the winding center C-C in one or more layers to form the first coil  90 . 
     Exemplarily, the first coil  90  has three layers, which is formed by winding an end of a wire on the outer surface  801  of the magnetic isolation sheet  80 . The first coil  90  is formed by winding the end of the wire along an edge of the outer surface  801  of the magnetic isolation sheet  80 , to form a relatively large coil inside the annular-shaped wearing member  10 , which is advantageous for forming a relatively large magnetic induction loop. As such, a relatively larger number of magnetic field lines pass through the first coil  90 , to generate a relatively large induced current. This helps to enhance the charging efficiency of the power supply  20 . In some other embodiments, the first coil  90  may have one layer, two layers, three layers, four layers, or more than six layers. That is, the first coil  90  may have one layer or more layers. 
       FIG.  6    is a schematic structural diagram of the wearable device  100  in the wearable system  100  shown in  FIG.  1    according to another embodiment. 
     In this embodiment, the wearable device  100  further includes an auxiliary circuit board  120 . The auxiliary circuit board  120  is electrically connected to the power supply  20  (as shown in  FIG.  3   ). Specifically, the auxiliary circuit board  120  is electrically connected to the circuit board  70  (as shown in  FIG.  3   ), so as to be electrically connected to the power supply  20  via the circuit board  70 . The auxiliary circuit board  120  is in a shape of an arc-shaped plate. The auxiliary circuit board  120  includes an outer surface  120   a  and an inner surface  120   b  that are disposed opposite to each other. The outer surface  120   a  of the auxiliary circuit board  120  is arranged along a circumferential direction away from the annular-shaped wearing member  10 . That is, the outer surface  120   a  of the auxiliary circuit board  120  is disposed around the central axis O-O (as shown in  FIG.  3   ) of the annular-shaped wearing member  10 . Exemplarily, the outer surface  120   a  of the auxiliary circuit board  120  is a circular arc surface, and a central axis of the outer surface  120   a  of the auxiliary circuit board  120  is coincident with the central axis O-O of the wearing member  10 . 
     Specifically, the magnetic isolation sheet  80  is mounted to the inner surface  120   b  of the auxiliary circuit board  120 . The first coil  90  is mounted to the outer surface  120   a  of the auxiliary circuit board  120 , and is electrically connected to the auxiliary circuit board  120 , so as to be electrically connected to the power supply  20  via the auxiliary circuit board  120  and the circuit board  70 . The laying surface of the first coil  90  is the outer surface  120   a  of the auxiliary circuit board  120 . The first coil  90  is formed by winding a wire along an edge of the outer surface  120   a  of the auxiliary circuit board  120   a.  In this case, the isolation sheet  80 , the first coil  90 , and the auxiliary circuit board form a wireless charging module of the wearable device  100 . 
     In addition, a projection of the isolation sheet  80  on the inner surface  120   b  of the auxiliary circuit board  120  covers a projection of the first coil  90  on the inner surface  120   b  of the auxiliary circuit board  120 . That is, the projection of the first coil  90  on the inner surface  120   b  of the auxiliary circuit board  120  is located within the projection of the isolation sheet  80  on the inner surface  120   b  of the auxiliary circuit board  120 . As such, the attenuation and interference to the magnetic field of the first coil  90  caused by the metal case of the power supply  20  can be reduced, which plays a role of isolating metal. This reduces energy waste, thereby improving the charging efficiency. In some other embodiments, the projection of the first coil  90  on the inner surface  120   b  of the auxiliary circuit board  120  may be partially located within the projection of the isolation sheet  80  on the inner surface  120   b  of the auxiliary circuit board  120 . That is, the projection of the first coil  90  on the inner surface  120   b  of the auxiliary circuit board  120  is at least partially located within the projection of the isolation sheet  80  on the inner surface  120   b  of the auxiliary circuit board  120 . 
       FIG.  7    is a schematic structural diagram of the wearable system  1000  shown in  FIG.  1    in another state.  FIG.  8    is a schematic cross-sectional view of the wearable system  1000  shown in  FIG.  7    sectioned along an II-II direction. In the state shown in  FIG.  7   , a user is wearing the wearable device  100  and holding the electronic device  200 . 
     The electronic device  200  includes a housing  210 , a power supply  220 , and a second coil  230 . The power supply  220  and the second coil  230  are both mounted inside the housing  210 . The housing  210  includes a middle frame  211  and a rear cover  212 . The middle frame  211  is fixedly connected to the rear cover  212 . In this case, the power supply  220  and the second coil  239  are both mounted at a side of the rear cover  212  close to the middle frame  211 . That is, the power supply  220  and the second coil  230  are both mounted at an inner side of the rear cover  212 . 
     The second coil  230  is electrically connected to the power supply  220 . Specifically, the second coil  230  is located at a middle of the electronic device  200 . A winding center C′-C′ of the second coil  230  is perpendicular to the rear cover  212 . The second coil  230  has a reverse charging mode. In the reverse charging mode, the second coil  230  is connected to the power supply  220 . Under the action of an alternating current provided by the power supply  220 , an alternating current passes through the second coil  230 , and the second coil  230  generates an alternating magnetic field, namely radiating alternating magnetic field lines outward. In some other embodiments, the second coil  230  may have a forward charging mode. In the forward charging mode, electromagnetic induction occurring between the second coil  230  and an external wireless power supply device charges the power supply  220 , so as to enhance a battery life of the electronic device  200 . 
     As shown in  FIG.  7    and  FIG.  8   , the outer annular surface  102  of the annular-shaped wearing member  10  partially abuts against the electronic device. The first coil  90  of the wearable device  100  and the second coil  230  of the electronic device  200  are disposed opposite to each other, and in addition, the two when being energized generate the magnetic field lines in the same direction. The winding center C-C of the first coil  90  is coincident with the winding center C′-C′ of the second coil  230 . In some other embodiments, the winding center C-C of the first coil  90  may be disposed in parallel with the winding center C′-C′ of the second coil  230 . 
     During the process that the user&#39;s hand is wearing the wearable device  100  and holding the electronic device  200 , when the outer annular surface  102  of the annular-shaped wearing member  10  partially abuts against the electronic device  200 , and the first coil  90  is disposed oppositely with the second coil  230 , the second coil  230  of the electronic device  200  may generate the alternating magnetic field under the action of the alternating current provided by the power supply  220 . The first coil  90  of the wearable device  100  senses the second coil  230  of the electronic device  200 , to couple with the second coil  230  of the electronic device  200 , which realizes that the electronic device  200  provides power supply to the wearable device  100  via the second coil  230 . In other words, when a user is wearing the wearable device  100 , the user does not need to remove the wearable device  100 , but instead, directly allow the outer annular surface  102  of the annular-shaped wearing member  10  to partially abut against the electronic device  200 , so that the first coil  90  and the second coil  230  are disposed opposite to each other. In this way, the wearable device  100  can be charged while the electronic device  200  is being used, which simplifies the charging manner of the wearable device  100 , and enhances the battery life of the wearable device  100 , thereby improving user experience. 
     It should be understood that, the first coil  90  generates the induced current under the action of the alternating magnetic field of the second coil  230 . Since the induced current is an alternating current, the first coil  90  also generates an alternating magnetic field, namely radiating alternating magnetic field lines M 1  outward. In this case, the direction of the magnetic field lines M 1  generated by the first coil  90  is the same as the direction of the magnetic field lines M 2  generated by the second coil  230 . The direction of the magnetic field lines M 1  when the first coil  90  is energized passes through the outer annular surface  102  of the annular-shaped wearing member  10 . 
     It should be noted that, a ring has a relatively small size, which only allows a small space inside the annular-shaped wearing member  10  for placing the power supply  20 , therefore the power supply  20  has a small capacity. When using the wearable device  100 , a user needs to charge the power supply  20  several times a day, which causes an inconvenience to the user. The wearable device  100  according to this embodiment of the present disclosure can be charged while the electronic device  20  is being used, which overcomes this inconvenience, thereby improving the user experience of the wearable device  100 . 
     In some other embodiments, during the process that the user&#39;s hand is wearing the wearable device  100  and holding the electronic device  200 , when the outer annular surface  102  of the annular-shaped wearing member  10  partially abuts against the electronic device  200 , and the first coil  90  is disposed opposite to the second coil  230 , the first coil  90  of the wearable device  100  generates an alternating magnetic field under the action of the alternating current provided by the power supply  20 . The second coil  230  of the electronic device  200  senses the first coil  90  of the wearable device  100 , so as to couple with the first coil  90  of the wearable device  100 . This realizes that the wearable device  100  provides power supply to the electronic device  200  via the first coil  90 . 
     As shown in  FIG.  8   , the annular-shaped wearing member  10  includes a charging portion  13  disposed opposite to the first coil  90 . The charging portion  13  is made of a non-metallic material. The first coil  90  senses the magnetic field lines via the charging portion  13 . That is, the first coil  90  receives an energy emitted by an external power supply device via the charging portion  13 . That is, the first coil  90  senses the alternating magnetic field of the second coil  230  via the charging portion  13 , to generate the induced current. It should be understood that, the first coil  90  and the second coil  230  transfer energy therebetween by using the principle of alternating electromagnetic field induction. The charging portion  13  made of the non-metallic material effectively guarantees the energy transfer between the first coil  90  and the second coil  230 , thereby realizing the charging of the power supply  20  of the wearable device  100 . The non-metallic material may be plastic, polymer, and/or a material that does not affect electromagnetic induction, such as jade or any other mineral material. 
     In some other embodiments, the entire annular-shaped wearing member  10  may be made of the non-metallic material. That is, the entire annular-shaped wearing member  10  may be the charging portion  13 . In this case, a user may wear the wearable device  100  at will. When the outer annular surface  102  of the annular-shaped wearing member  10  abuts against the electronic device  200 , the first coil  90  senses the magnetic field lines via the annular-shaped wearing member  10 , so as to realize charging the wearable device  100 . 
     In this embodiment, the second housing  12  includes the charging portion  13 . Specifically, the charging portion  13  is a portion of the second housing  12  of the annular-shaped wearing member  10  that is just opposite to the first coil  90 . That is, a projection of the first coil  90  on the second housing  12  of the annular-shaped wearing member  10  just covers the charging portion  13 , so that each position of the first coil  90  facing a surface of the charging portion  13  can sense the alternating magnetic field of the second coil  230 , so as to generate the induced current. It should be understood that, a remaining portion of the second housing  12  except the charging portion  13  may be made of the non-metallic material, or be made of a metallic material. That is, the second housing  12  is at least partially made of the non-metallic material. 
     In some other embodiments, the charging portion  13  may not be the portion of the second housing  12  that is just opposite to the first coil  90 , but rather a portion of the second housing  12  that is partially opposite to the first coil  90 . Alternatively, the second housing  12  is the charging portion  13 . The present disclosure does not limit the position of the charging portion  13  on the annular-shaped wearing member  10 . 
     In addition, the outer annular surface  102  of the annular-shaped wearing member  10  is provided with a wearing identification  103 , to identify a wearing position of the annular-shaped wearing member  10 . In this embodiment, the wearing identification  103  is disposed opposite to a projection of the first coil  90  on the outer annular surface  102  of the annular-shaped wearing member  10 . That is, the wearing identification  103  is located in a region of the outer annular surface  102  of the annular-shaped wearing member  10  away from the first coil  90 . When a user is wearing the wearable device  100 , the wearing identification  103  faces outward, that is, the wearing identification  103  is located on a side close to the back of the user&#39;s hand. In this case, the first coil  90  is located on a side close to the user&#39;s palm. When the user is holding the electronic device  200 , the first coil  90  can be disposed just opposite to the second coil  230  of the electronic device  200 , to sense the alternating magnetic field of the second coil  230 , so as to generate a current, thereby realizing the charging of the power supply  20 . The wearing identification  103  may be a structure used for an identification purpose provided on the outer annular surface  102  of the annular-shaped wearing member  10 , such as an identification pattern (such as a five-pointed star or a loving heart), a bump, a depression, a micro-engraved line, a rough surface, or a polished surface, which can serve for identification, and at the same time, improve the beauty of the appearance of the wearable device  100 , thereby being conducive to personalized design of the wearable device  100 . It should be understood that, the outer annular surface  102  of the annular-shaped wearing member  10  may be provided with a decorative pattern or design, to improve the beauty of the appearance of the wearable device  100 . 
     In some other embodiments, the projection of the first coil  90  on the outer annular surface  102  of the annular-shaped wearing member  10  may cover the wearing identification  103 . In this case, the wearing identification  103  may identify a position of the first coil  90 . When a user is wearing the wearable device  100 , the wearing identification  103  faces inward. That is, the wearing identification  103  is located on a side close to the user&#39;s palm. This facilitates that the first coil  90  of the wearable device  100  is disposed opposite to the second coil  230  of the electronic device  200 , to sense the alternating magnetic field of the second coil  230  so as to generate the current, thereby realizing the charging of the power supply  20 . 
     The foregoing descriptions are merely specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any equivalent modification or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present disclosure shall fall within the protection scope of the present disclosure. In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.