A wearable device

Abstract

The embodiment of the present invention relates to the technical field of wearable device manufacturing, and discloses a wearable device, including: a metal frame, a mainboard and an antenna, wherein the mainboard is fixed in the area surrounded by the metal frame; the antenna includes a first radiation unit and a second radiation unit; the metal frame serves as the first radiation unit, and the second radiation unit and the first radiation unit are electrically connected to the main antenna signal end of the mainboard through a connector. The present invention adds a second radiation unit sharing a feeding point with the first radiation unit on the basis of using the metal frame as the first radiation unit of the antenna, so that the antenna can cover signals of different frequency bands, thereby enhancing the antenna function of the wearable device.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of wearable device manufacturing, and in particular to a wearable device. Background Art

[0002] With the development of science and technology, the functional requirements of smart wearable devices are increasing, and voice calls have become their essential functions. Therefore, in order to meet the various functional requirements of smart wearable devices, it is necessary to configure full-band antennas for smart wearable devices.

[0003] However, due to the miniaturization and thinness of watches, the internal space of the watch is small and the antenna layout is limited. In the absence of solutions such as adding antenna brackets, only using the metal frame of the watch as an antenna cannot cover the full frequency band performance of 700MHz~960MHz and 1710MHz~2700MHz.

[0004] Therefore, there is an urgent need to provide a full-band antenna solution for metal wearable devices. Summary of the invention

[0005] The technical problem solved by the embodiments of the present invention is to provide a wearable device to solve the problem that the antenna capacity of existing wearable devices is insufficient and cannot cover the 2G / 3G / 4G full-band network antenna signals.

[0006] To solve the above problems, an embodiment of the present invention provides a wearable device, including: a metal frame, a main board and an antenna, wherein the main board is fixed in the area enclosed by the metal frame; the antenna includes a first radiation unit and a second radiation unit; the metal frame serves as the first radiation unit, and the second radiation unit and the first radiation unit are electrically connected to the main antenna signal end of the main board through a connector.

[0007] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following advantages: by using a metal frame as the first radiation unit of the main antenna of the wearable device and adding a second radiation unit of the main antenna, the routing length of the antenna is increased, thereby enhancing the signal coverage capability of the antenna, and can cover antenna signals in multiple frequency bands.

[0008] In addition, the wearable device also includes a screen body arranged on the metal frame, the screen body is arranged opposite to the main board, and the second radiation unit is attached to the surface of the screen body facing the main board. By using the space on the inner surface of the screen body for antenna routing, the limited space in the device can be reasonably utilized, and the space occupied by the antenna can be reduced while improving the natural signal coverage capability of the wearable device; the screen body is far away from the main board, the antenna environment is cleaner, and the interference of the electronic components on the main board to the antenna is reduced. The screen body is far away from the arm, so that the arm absorbs less antenna radiation, which effectively improves the efficiency of the antenna.

[0009] In addition, the second radiation unit is an arc-shaped antenna, and the second radiation unit is attached to the inner edge of the surface of the screen body facing the main board. By adopting an arc-shaped antenna and setting the antenna at the inner edge of the screen body, the second radiation unit of the antenna can be staggered with the main display area of ​​the wearable device screen body, avoiding interference of the second radiation unit of the antenna by electronic components in the main display area, and the second radiation unit will not affect the content display in the main display area.

[0010] In addition, the connecting member includes a side feed spring sheet and an upper feed spring sheet, the second radiation unit includes a connecting portion and a wire portion electrically connected to each other, the side feed spring sheet is electrically connected to the metal frame, and the upper feed spring sheet is electrically connected to the connecting portion.

[0011] In addition, the conductor part is a conductor printed from any one of conductive silver paste, conductive copper paste or conductive graphene. The above materials are used as the conductor part of the antenna, and can be directly printed using a printing process, which is convenient and fast, and is conducive to preparing a second radiation unit with a narrow width, thereby reducing the area occupied by the second radiation unit on the screen.

[0012] In addition, the width of the wire portion is 0.5 mm to 2 mm. The use of the wire portion with the above width can further reduce the screen area occupied by the second radiation unit of the antenna, so that a larger screen display area can be prepared, which is conducive to manufacturing wearable devices with a high screen-to-body ratio.

[0013] In addition, the conductor part is an FPC. Using the FPC as the conductive part of the second radiation unit can reduce the manufacturing cost of the wearable device.

[0014] In addition, the metal frame is also provided with an isolation ground and a Bluetooth antenna feed point, and the Bluetooth antenna feed point is electrically connected to the Bluetooth antenna signal terminal on the mainboard. By using the metal frame as a radiation unit of the Bluetooth antenna, the Bluetooth function of the wearable device can be realized while reducing the internal space occupied by the Bluetooth antenna.

[0015] In addition, the antenna also includes a third radiation unit, the third radiation unit is attached to the surface of the screen body facing the mainboard and does not overlap with the second radiation unit, and the third radiation unit is electrically connected to the signal end of any one of the Bluetooth antenna, WIFI antenna or GPS antenna on the mainboard. By utilizing the space on the inner surface of the screen body to arrange the radiation units of the Bluetooth antenna, WIFI antenna or GPS antenna, the functions supported by the wearable device can be further enriched.

[0016] In addition, a grounding feeding point electrically connected to the grounding terminal of the mainboard is arranged on the metal frame, and the grounding terminal is serially connected with an antenna switch and / or a frequency modulation circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 A structural schematic diagram of a wearable device provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of an antenna of a wearable device provided by an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of a top view of a wearable device provided by an embodiment of the present invention;

[0021] Figure 4 and Figure 5 This is a simulation effect diagram of an antenna signal of a wearable device provided by an embodiment of the present invention;

[0022] Figure 6 A structural schematic diagram of a wearable device provided by another embodiment of the present invention;

[0023] Figure 7 This is a diagram of antenna signal simulation effect of a wearable device provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can be implemented.

[0025] An embodiment of the present invention provides a wearable device, comprising: a metal frame, a main board and an antenna, wherein the main board is fixed in an area enclosed by the metal frame; the antenna comprises a first radiation unit and a second radiation unit; the metal frame serves as the first radiation unit, and the second radiation unit and the first radiation unit are electrically connected to the main antenna signal end of the main board through a connector.

[0026] By using a metal frame as the first radiation unit of the main antenna of the wearable device and adding a second radiation unit of the main antenna, the antenna routing length is increased, thereby enhancing the signal coverage capability of the antenna and covering antenna signals in multiple frequency bands.

[0027] Figure 1 A partial cross-sectional structural diagram of a wearable device provided in one embodiment of the present invention, Figure 2 A schematic diagram of the structure of an antenna of a wearable device provided by an embodiment of the present invention, Figure 3 A schematic top view of the structure of a wearable device provided in one embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] In this embodiment, the wearable device is a smart wearable device with a built-in radio frequency antenna, such as a smart watch, a smart bracelet, etc. In this embodiment, the wearable device is a smart watch as an example.

[0029] refer to Figure 1 The wearable device includes a metal frame 101, a mainboard 102 and an antenna 103 (refer to Figure 2 ).

[0030] The mainboard 102 is fixed in the area surrounded by the metal frame 101. It is understandable that the area surrounded by the metal frame 101 can be circular, rectangular, etc., and the shape of the area surrounded by the metal frame is not limited here. The mainboard 102 is fixed in the area surrounded by the metal frame 101, which is a prior art.

[0031] refer to Figure 2 The antenna 103 of the wearable device includes a first radiation unit 11 and a second radiation unit 12 , and the first radiation unit 11 and the second radiation unit 12 are connected to the main antenna signal end through a connector 105 .

[0032] In this embodiment, the metal frame 101 serves as the first radiation unit 11 of the wearable device antenna 103 .

[0033] It should be noted that, in conjunction with the reference Figure 1 and Figure 3 The wearable device may further include a screen body 104 disposed on the metal frame 101 , the screen body 104 is disposed opposite to the main board 102 , and the second radiation unit 12 is attached to a surface of the screen body 104 facing the main board 102 .

[0034] By using the space on the inner surface of the screen to route the antenna, the limited space in the device can be reasonably utilized, and the space occupied by the second radiating unit 12 of the antenna can be reduced while improving the natural signal coverage capability of the wearable device; in addition, since the screen space is far away from the mainboard electronic components and far away from the user's arm, the antenna environment is relatively pure. Arranging the second radiating unit 12 of the antenna on the inner surface of the screen facing the mainboard can reduce interference with the antenna signal by other factors.

[0035] Specifically, the screen body 104 includes display components facing the main board 102 and a glass outer screen away from the main board 102 .

[0036] In other embodiments, the second radiation unit may also be located at other positions of the wearable device, such as on a surface of the housing of the wearable device facing the mainboard.

[0037] In addition, combined with reference Figure 1 and Figure 3 The connecting member 105 may include a side feed spring plate (unlabeled) and an upper feed spring plate (unlabeled), and the second radiating unit 12 includes a connecting portion 13 and a wire portion 14 electrically connected to each other, the side feed spring plate is electrically connected to the metal frame 101, and the upper feed spring plate is electrically connected to the connecting portion 13.

[0038] The connector 105 is electrically connected to the main antenna signal end on the main board 102 and fixed on the main board 102. The connector 105 is electrically connected to the metal frame 101 through the side feed spring sheet, thereby realizing the electrical connection between the metal frame 101 and the main antenna signal end on the main board 102. The connector 105 is electrically connected to the connecting portion 13 of the second radiating unit 12 through the upper feed spring sheet, thereby realizing the electrical connection between the second radiating unit 12 and the main antenna signal end.

[0039] Since the metal frame and the second radiation unit are electrically connected to the connector via the spring sheet on the connector, during the assembly process of the wearable device, the electrical connection between the second radiation unit 12 and the main antenna signal end can be achieved by pressing the screen to a fixed position so that the connection portion 13 of the second radiation unit 12 is in close contact with the upper feed spring sheet of the connector 105, thereby achieving a simple and convenient installation.

[0040] It should be noted that the reference Figure 3 The second radiation unit 12 may be an arc-shaped antenna, and the second radiation unit 12 is attached to the inner edge of the surface of the screen body 104 facing the main board. By adopting an arc-shaped antenna, the second radiation unit 12 is set at the inner edge of the screen body 104, so that the second radiation unit 12 of the antenna is staggered with the main display area of ​​the wearable device screen body 104, thereby preventing the second radiation unit 12 of the antenna from being interfered by the electronic components in the main display area, and the second radiation unit 12 will not affect the content display in the main display area, forming the effect of an invisible antenna in visual perception.

[0041] In other embodiments, the second radiation unit may also be in other shapes, such as a straight line shape, a wavy shape, etc., and attached to the surface of the screen body facing the mainboard.

[0042] It should be noted that the conductor part 14 can be a conductor printed from any one of conductive silver paste, conductive copper paste or conductive graphene. The above materials are used as the conductor part of the antenna, which can be directly printed by a printing process, so that the process of forming the conductor part 14 of the second radiation unit 12 is convenient and quick, and because the conductor part can be directly printed by a printing process, a narrower conductor part 14 can be formed, further avoiding the influence of the second radiation unit 12 attached to the surface of the screen 104 on the display of the content of the wearable device.

[0043] The width of the wire portion 14 can be 0.5 mm to 2 mm. For example, it can be 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm or 1.8 mm. With the wire portion 14 of the above width, the area occupied by the second radiation unit 12 on the screen surface is small, so that the influence of the second radiation unit 12 attached to the surface of the screen 104 on the display of the content of the wearable device can be avoided, and a larger screen display area can be prepared, which is conducive to manufacturing a wearable device with a high screen-to-body ratio while ensuring the radiation capacity of the second radiation unit 12 to the main antenna signal.

[0044] In addition, in this embodiment, the length of the second radiation unit 12 is related to the product size of the wearable device and specific debugging requirements, and no excessive restrictions are made on the length of the second radiation unit.

[0045] It should be noted that the antenna in this embodiment may also include a third radiation unit (not marked), which is attached to the surface of the screen 104 facing the mainboard 102 and does not overlap with the second radiation unit 12, and the third radiation unit is electrically connected to the signal end of any one of the Bluetooth antenna, WIFI antenna or GPS antenna on the mainboard 102. By utilizing the space on the inner surface of the screen to arrange the radiation units of the Bluetooth antenna, WIFI antenna or GPS antenna, the functions supported by the wearable device can be further enriched.

[0046] With the advent of the era of the Internet of Everything and the development of communication technology, existing wearable devices that only support text messaging and calling functions may no longer be able to meet user needs. Therefore, adding Bluetooth antennas, WIFI antennas, GPS antennas and other functions to wearable devices can enrich the functions of wearable devices and improve the playability of wearable devices and user experience.

[0047] Specifically, the third radiation unit can be attached to the surface of the screen body 104 facing the main board 102, and is electrically connected to the signal terminal on the main board through an electrical connector (not marked). The third radiation unit can be an arc-shaped antenna, located at the edge where the screen body 104 and the metal frame 101 are attached, and the third radiation unit is arranged opposite to the second radiation unit 12. In this way, the visual concealment feature of the inner edge area of ​​the screen body facing the main board surface can be fully utilized, so that the third radiation unit arranged therein is not easily noticed during normal use by the user, thereby avoiding the influence of the antenna arranged on the screen body surface on the user's use.

[0048] It can be understood that, in other embodiments, the third radiation unit may also be located at other positions on the surface of the screen body facing the mainboard.

[0049] It should be noted that, in this embodiment, a grounding feed point (not marked) electrically connected to a ground terminal (not marked) of the mainboard 102 may also be provided on the metal frame 101, and an antenna switch and / or a frequency modulation circuit may be connected in series to the ground terminal.

[0050] The first radiation unit 11 is electrically connected to the ground terminal of the mainboard 102 through a ground feed point, and is connected to the ground through the ground feed point. Capacitors, inductors, antenna switches or tunes can be connected in series on the ground terminal of the mainboard 102 according to debugging requirements to adjust the antenna length, low, medium and high frequency resonance of the antenna, or a frequency modulation circuit can be connected in series to adjust the resonant frequency of the antenna; and a switch for controlling the antenna can be connected in series. It should be noted that the location where the antenna signal is grounded, that is, the location where the first radiation unit 11 is connected to the ground terminal is not limited to the setting of the present invention, and can be determined according to the debugging requirements of the wearable device and the antenna signal.

[0051] Figure 4 and Figure 5 They are respectively the S11 and efficiency curves after simulating the entire antenna system of the wearable device provided in this embodiment using the simulation software CST, and refer to Figure 4 and Figure 5 Based on the antenna design provided above, the antenna resonant frequency of the smart wearable device can better cover the 2G / 3G / 4G network, which can better meet the requirements of smart wearable devices covering the full frequency band.

[0052] Compared with the prior art, the wearable device provided in this embodiment uses the metal frame 101 as the first radiation unit 11 of the main antenna of the wearable device and adds the second radiation unit 12 of the main antenna, thereby increasing the routing length of the antenna, thereby enhancing the signal coverage capability of the antenna and covering antenna signals in multiple frequency bands.

[0053] Another embodiment of the present invention further provides a wearable device. The second embodiment is substantially the same as the first embodiment, with the main difference being that in the first embodiment, the conductor portion of the second radiation unit is a conductor printed with any one of conductive silver paste, conductive copper paste or conductive graphene. In the second embodiment of the present invention, the conductor portion of the second radiation unit is an FPC. In addition, those skilled in the art will appreciate that in the various embodiments of the present invention, many technical details are proposed in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in the present application can be implemented.

[0054] Figure 6 The structural diagram of the wearable device provided in this embodiment is as follows. Figure 6 This embodiment is described in detail. For the same or similar technical details, please refer to the previous embodiment.

[0055] refer to Figure 6 The wearable device includes a metal frame 201, a main board, a screen body 204 and an antenna, wherein the metal frame 201 serves as a first radiation unit of the antenna, and a second radiation unit 22 of the antenna is located on a surface of the screen body 204 facing the main board, and the second radiation unit 22 includes a connecting portion 23 and a wire portion 24.

[0056] In this embodiment, the wire portion 24 is an FPC. Specifically, the second radiation unit is an FPC antenna, the connecting portion 23 is a gold finger portion of the FPC antenna, and is used to achieve electrical connection with the antenna signal terminal on the mainboard, and the wire portion 24 is an FPC wire portion of the FPC antenna.

[0057] Due to ID and layout restrictions, when it is impossible to add an antenna bracket, the second radiation unit 24 is used to increase the antenna routing length, which can optimize the antenna performance; and the second radiation unit 24 is set on the surface of the screen 204 facing the mainboard, so that the second radiation unit 24 is far away from the mainboard of the whole machine, avoiding interference from components on the mainboard and reducing the absorption loss of the arm to the antenna. In addition, as a very mature antenna process in the industry, the FPC antenna has low cost, high yield, and short production cycle. Using the FPC antenna as the second radiation unit 24 can reduce the manufacturing cost of wearable devices.

[0058] In addition, refer to Figure 6 In this embodiment, an isolation ground 207 and a Bluetooth antenna feeding point 208 may also be provided on the metal frame 201, and the Bluetooth antenna feeding point 208 is electrically connected to the Bluetooth antenna signal terminal (not marked) on the mainboard.

[0059] An isolation ground is set on the metal frame 201, so that the metal frame is divided into two parts, one part is used as the first radiation unit of the main antenna, and the other part is used as the radiation unit of the Bluetooth antenna. Therefore, while adding a Bluetooth antenna to enable the wearable device to support the Bluetooth function, the Bluetooth antenna reduces the internal space occupied by the wearable device, thereby leaving the internal space for other components such as the motherboard, so that the wearable device can support more functions and is conducive to the lightweight body design of the wearable device.

[0060] In this embodiment, a grounding feeding point 206 may also be provided on the metal frame 201 to realize electrical connection between the main antenna and the Bluetooth antenna and the grounding terminal of the mainboard.

[0061] It should be noted that the positions of the isolation ground 207 , the Bluetooth antenna feeding point 208 , and the ground feeding point 206 in this solution can be determined according to actual product debugging requirements.

[0062] Figure 7 This is a S11 curve diagram after simulating the entire antenna system of the wearable device provided in this embodiment using the simulation software CST. Figure 7 Based on the antenna design provided above, the antenna resonant frequency of the smart wearable device can better cover the 2G / 3G / 4G network, which can better meet the requirements of smart wearable devices covering the full frequency band.

[0063] Compared with the prior art, the wearable device provided in this embodiment uses a metal frame as the first radiation unit of the main antenna of the wearable device and adds a second radiation unit of the main antenna, thereby increasing the routing length of the antenna, thereby enhancing the signal coverage capability of the antenna and covering antenna signals in multiple frequency bands.

[0064] Those skilled in the art will appreciate that the above embodiments are specific examples of the present invention, and in practical applications, various changes may be made to the embodiments in form and detail without departing from the spirit and scope of the present invention. Any person skilled in the art may make changes and modifications without departing from the spirit and scope of the present invention, and therefore the scope of protection of the present invention shall be subject to the scope defined in the claims.

Claims

1. A wearable device, characterized in that: include: A metal frame, a mainboard and an antenna, wherein the mainboard is fixed in an area surrounded by the metal frame; the antenna comprises a first radiation unit and a second radiation unit; the metal frame serves as the first radiation unit, and the second radiation unit and the first radiation unit are electrically connected to a main antenna signal end of the mainboard through a connector; the wearable device further comprises a screen body arranged on the metal frame, the screen body is arranged opposite to the mainboard, the second radiation unit is an arc antenna, and the second radiation unit is attached to the inner edge of the surface of the screen body facing the mainboard; The connecting member includes a side-feed spring and an upper-feed spring, the second radiation unit includes a connecting portion and a wire portion electrically connected to each other, the side-feed spring is electrically connected to the metal frame, and the upper-feed spring is electrically connected to the connecting portion.

2. The wearable device according to claim 1, characterized in that: The conductor part is a conductor printed with any one of conductive silver paste, conductive copper paste or conductive graphene.

3. The wearable device according to claim 2, characterized in that: The width of the wire portion is 0.5 mm to 2 mm.

4. The wearable device according to claim 1, characterized in that: The conductor part is an FPC.

5. The wearable device according to claim 1, characterized in that: An isolation ground and a Bluetooth antenna feeding point are also provided on the metal frame, and the Bluetooth antenna feeding point is electrically connected to the Bluetooth antenna signal terminal on the mainboard.

6. The wearable device according to claim 1, characterized in that: The antenna also includes a third radiation unit, which is attached to the surface of the screen body facing the mainboard and does not overlap with the second radiation unit. The third radiation unit is electrically connected to the signal end of any one of the Bluetooth antenna, WIFI antenna or GPS antenna on the mainboard.

7. The wearable device according to claim 1, characterized in that: A grounding feeding point electrically connected to a grounding terminal of the mainboard is arranged on the metal frame, and an antenna switch and / or a frequency modulation circuit are connected in series to the grounding terminal.

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