Wearable device

Abstract

The invention provides wearable equipment, relates to the technical field of wearable products, and can ensure the structural strength and appearance consistency of the whole machine while the wearable equipment has the functions of navigation, Bluetooth, conversation and the like. The wearable device comprises a screen, a first annular outer frame part, a reference ground layer, a first radiator and a first radio frequency circuit. The screen is provided with a display face, and the first annular outer frame part is located on the side, back to the display face, of the screen and surrounds the edge of the screen by a circle. The reference ground layer is located in an area surrounded by the first annular outer frame part, and the periphery of the edge of the reference ground layer is electrically connected with the first annular outer frame part. The first radiator is arranged on the screen, the first radiator and the reference ground layer are arranged at intervals in the axial direction of the first annular outer frame part, and a first radiation gap is formed between the periphery of the edge of the first radiator and the end, facing the screen, of the first annular outer frame part. And the first radio frequency circuit is coupled with the end part, facing the first annular outer frame part, of the first radiator.

Description

Technical Field

[0001] The present application relates to the technical field of wearable products, and in particular to a wearable device. Background Art

[0002] At present, wearable devices such as smart watches and bracelets have more and more functions. In addition to conventional functions such as checking time and monitoring vital signs data, they also have functions such as navigation, Bluetooth and calling by setting at least one antenna.

[0003] The wearable device includes an annular outer frame, which serves as the supporting skeleton of the whole device, and is used to support the screen, bottom shell and other structural parts, and protect the internal motherboard, battery, vibration motor, speaker and other electronic components. In the prior art, the annular outer frame is provided with at least two breakpoints along the circumference, so that at least one section of the annular outer frame along the circumference can be used as the radiator of the antenna to realize the transmission and reception of radio frequency signals. However, this destroys the structural integrity of the annular outer frame, affects the structural strength of the whole device, and also affects the appearance consistency of the whole device. Summary of the invention

[0004] The present application provides a wearable device that can ensure the structural strength and appearance consistency of the entire device while having functions such as navigation, Bluetooth, and calling.

[0005] To achieve the above-mentioned purpose, the present application provides a wearable device, which includes a screen, a first annular outer frame, a reference stratum, a first radiator and a first radio frequency circuit. The screen has a display surface. The first annular outer frame is located on the side of the screen that is opposite to the display surface and is arranged around the screen. The reference stratum is located in the area surrounded by the first annular outer frame, and the edge of the reference stratum is electrically connected to the first annular outer frame. The first radiator is arranged on the screen and is spaced apart from the reference stratum in the axial direction of the first annular outer frame, and a first radiation gap is provided between the edge of the first radiator and the end of the first annular outer frame facing the screen. The first radio frequency circuit is coupled and connected to the end of the first radiator facing the first annular outer frame.

[0006] In this way, by setting a reference stratum in the area surrounded by the first annular outer frame, the reference stratum and the first annular outer frame form a first concave cavity with an opening toward the screen, and setting a first radiator on the screen to construct a screen-side cavity antenna, the transmission and reception of radio frequency signals can be achieved. The screen-side cavity antenna does not need to set breakpoints on the first annular outer frame, which can ensure the integrity of the annular structure of the first annular outer frame, ensure the structural strength of the annular outer frame and the entire machine, and improve the neatness of the appearance.

[0007] Optionally, the width of the first radiation slot may be greater than or equal to 0.5 mm and less than or equal to 3 mm. Specifically, the width may be 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm.

[0008] Optionally, the first radiator and the first annular outer frame are spaced apart in the axial direction of the first annular outer frame. In this way, the first radiator and the first annular outer frame have a certain height difference in the axial direction of the first annular outer frame, the electric field component of the radiation electric field at the first radiation gap is larger in the vertical direction, and the electric field component in the horizontal direction is smaller, and the electric field radiated outward is mainly in the vertical direction. The human body absorbs less electric fields in the vertical direction, which can improve the radiation efficiency of the screen side cavity antenna.

[0009] Optionally, the gap width between the first radiator and the first annular outer frame in the axial direction of the first annular outer frame can be greater than 0 mm and less than 2 mm. Specifically, the gap width can be 0.5 mm, 1 mm, 1.5 mm or 2 mm. When the gap width is within this range, the distance between the first radiator and the first annular outer frame in the axial direction of the first annular outer frame is moderate, the radiation efficiency of the screen-side cavity antenna is better, and it is also conducive to the thinning of the entire machine.

[0010] Optionally, the screen includes a display surface, and the first radiator is disposed on a surface of the screen that is opposite to the display surface. In this way, the first radiator can be shielded by the screen to ensure the appearance consistency of the entire device, while not affecting the structural stability of the screen.

[0011] Optionally, a plane perpendicular to the axial direction of the first annular outer frame portion is a reference plane. The orthographic projection of the first radiator on the reference plane is a first projection, and the orthographic projection of the first annular outer frame portion on the reference plane is a second projection. The first projection is located in the area surrounded by the second projection, and the first projection is spaced apart from the second projection. In this way, the first radiator is opposite to the area surrounded by the first annular outer frame portion, and the edge of the first radiator is inclined relative to the end of the first annular outer frame portion facing the screen. Under the premise that the width of the first radiation gap is constant, the gap width between the first radiator and the first annular outer frame portion in the axial direction of the first annular outer frame portion can be reduced, which is conducive to the thinning of the entire machine.

[0012] Optionally, the first radiator includes a first main body and a second annular outer frame. The screen includes a display surface, and the first main body is arranged on the surface of the screen opposite to the display surface. The second annular outer frame and the screen are located on the same side of the first annular outer frame in the axial direction, and the second annular outer frame is coaxial with the first annular outer frame and is spaced apart in the axial direction of the first annular outer frame. The first main body is located in the area surrounded by the second annular outer frame, and the edge of the first main body is electrically connected to the second annular outer frame around the periphery. In this way, the first radiator, the first annular outer frame, and the reference stratum also form a screen-side cavity antenna, and the first radiation gap is located between the second annular outer frame and the first annular outer frame, which can also realize the transmission and reception of radio frequency signals.

[0013] Optionally, the wearable device further includes a first dielectric layer, which is disposed in a gap between the first annular outer frame portion and the second annular outer frame portion. The material of the first dielectric layer includes but is not limited to at least one of mica, porcelain, rubber, paper and polystyrene. This can ensure the structural integrity of the outer frame.

[0014] Optionally, the end of the first radiator facing the first annular outer frame is coupled to a reference ground layer or the first annular outer frame through a first lumped parameter element. The position on the first radiator that is coupled to the first RF circuit is the first position, and the position on the first radiator that is coupled to the first lumped parameter element is the second position, and the first position and the second position are spaced apart along the edge of the first radiator. In this way, by grounding the second position, the resonant frequency of the screen side cavity antenna can be increased, thereby increasing the operating frequency band and bandwidth of the screen side cavity antenna. Based on this, the position of the newly added resonant frequency can be adjusted with the help of the first lumped parameter element.

[0015] Optionally, the end of the first radiator facing the first annular outer frame is also coupled to a reference ground layer or the first annular outer frame through a second lumped parameter element. The position on the first radiator where the second lumped parameter element is coupled is the third position, and the first position, the second position and the third position are arranged in sequence along the edge of the first radiator. In this way, by grounding at the third position, the resonant frequency of the screen side cavity antenna can be further increased, thereby increasing the operating frequency band and bandwidth of the screen side cavity antenna. Based on this, the position of the newly added resonant frequency can be adjusted with the help of the second lumped parameter element.

[0016] Optionally, the central angles of the first position and the second position relative to the central axis of the first annular outer frame are 90°±5°, and the central angles of the second position and the third position relative to the central axis of the first annular outer frame are 90°±5°. In this way, the first position, the second position, and the third position are evenly distributed on the edge of the first radiator, and the first position, the second position, and the third position are convenient to locate.

[0017] Optionally, the operating frequency bands of the first radiator include 1575±1.023MHz, 1176±1.023MHz and 2400MHz-2500MHz. In this way, the screen side cavity antenna can cover the L1 frequency band of the GPS antenna, the L5 frequency band and the operating frequency band of the BT antenna, and realize GPS and BT functions.

[0018] Optionally, the wearable device further includes a bottom shell, a second radiator, and a second radio frequency circuit. The bottom shell is located on the side of the first annular outer frame portion facing away from the screen. The second radiator is arranged on the bottom shell and is spaced apart from the reference stratum in the axial direction of the first annular outer frame portion, and a second radiation gap is provided between the edge of the second radiator and one end of the first annular outer frame portion facing the bottom shell. The second radio frequency circuit is coupled and connected to the end of the second radiator facing the first annular outer frame portion.

[0019] In this way, by setting a reference stratum in the area surrounded by the first annular outer frame, the reference stratum and the first annular outer frame form a second concave cavity with an opening toward the bottom shell, and at the same time setting a second radiator on the bottom shell to construct a bottom shell side cavity antenna, the transmission and reception of radio frequency signals can be realized. The bottom shell side cavity antenna does not need to set a breakpoint on the first annular outer frame, which can ensure the integrity of the annular structure of the first annular outer frame, ensure the structural strength of the annular outer frame and the entire machine, and improve the neatness of the appearance.

[0020] Optionally, the second radiator and the first annular outer frame are spaced apart in the axial direction of the first annular outer frame. In this way, the second radiator and the first annular outer frame have a certain height difference in the axial direction of the first annular outer frame, the electric field component of the radiation electric field at the second radiation gap is larger in the vertical direction, and the electric field component in the horizontal direction is smaller, and the electric field radiated outward is mainly in the vertical direction. The human body absorbs less electric fields in the vertical direction, which can improve the radiation efficiency of the bottom shell side cavity antenna.

[0021] Optionally, the second radiator is arranged on the surface of the bottom shell facing the reference stratum. In this way, the second radiator can be shielded by the bottom shell to ensure the appearance consistency of the whole machine.

[0022] Optionally, the second radiator includes a second main body and a third annular outer frame. The second main body is arranged on the surface of the bottom shell facing the reference stratum. The third annular outer frame is located on the side of the first annular outer frame facing away from the screen, and the third annular outer frame is coaxial with the first annular outer frame and is spaced apart in the axial direction of the first annular outer frame. The second main body is located in the area surrounded by the third annular outer frame, and the edge of the second main body is electrically connected to the third annular outer frame around the periphery. In this way, the second radiator, the first annular outer frame, and the reference stratum also form a bottom shell side cavity antenna, and the second radiation gap is located between the third annular outer frame and the first annular outer frame, which can also realize the transmission and reception of radio frequency signals.

[0023] Optionally, the position on the second radiator that is coupled to the second RF circuit is the fourth position. Along the direction of the first annular outer frame, the fourth position is spaced apart from the first position, and the central angle between the fourth position and the first position relative to the central axis of the first annular outer frame is 90°±5°. In this way, the feeding positions of the screen side cavity antenna and the bottom shell side cavity antenna differ by approximately 90°, and the electric field radiation modes of the screen side cavity antenna and the bottom shell side cavity antenna are orthogonal, which can improve the isolation between the screen side cavity antenna and the bottom shell side cavity antenna.

[0024] Optionally, the end of the second radiator facing the first annular outer frame is also coupled to a reference stratum or the first annular outer frame through a third lumped parameter element. The position on the second radiator where the third lumped parameter element is coupled is the fifth position, and the fourth position and the fifth position are spaced along the edge of the second radiator. In this way, by grounding at the fifth position, the resonant frequency of the bottom shell side cavity antenna can be increased, thereby increasing the operating frequency band and bandwidth of the bottom shell side cavity antenna. Based on this, the position of the newly added resonant frequency can be adjusted with the help of the third lumped parameter element.

[0025] Optionally, the end of the second radiator facing the first annular outer frame is also coupled to a reference stratum or the first annular outer frame through a fourth lumped parameter element. The position on the second radiator where the fourth lumped parameter element is coupled is the sixth position. The fourth position, the fifth position, and the sixth position are arranged in sequence along the edge of the second radiator. In this way, by grounding at the sixth position, the resonant frequency of the bottom shell side cavity antenna can be further increased, thereby increasing the operating frequency band and bandwidth of the bottom shell side cavity antenna. Based on this, the position of the newly added resonant frequency can be adjusted with the help of the fourth lumped parameter element.

[0026] Optionally, the fourth position and the fifth position have a central angle of 90°±5° relative to the central axis of the first annular outer frame, and the fifth position and the sixth position have a central angle of 90°±5° relative to the central axis of the first annular outer frame. In this way, the fourth position, the fifth position and the sixth position are distributed more evenly on the edge of the second radiator, and the fourth position, the fifth position and the sixth position are convenient for positioning.

[0027] Optionally, the operating frequency band of the second radiator includes 700MHz to 960MHz, 1710MHz to 2170MHz, 2300MHz to 2400MHz and 2500MHz to 2700MHz. Thus, a call function can be supported, specifically, an ESIM call function can be supported.

[0028] Optionally, the wearable device further includes a circuit board, which is located in the area surrounded by the first annular outer frame, and the circuit board includes a multi-layer stacking structure formed by alternating multiple metal layers and multiple insulating medium layers, and parts of the multiple metal layers and metallized vias connected between the parts form the reference ground layer. In this way, the metal layer inside the circuit board is reused to form the reference ground layer, which can reduce the thickness and structural complexity of the whole device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a wearable device provided in some embodiments of the present application;

[0030] Figure 2 for Figure 1 A schematic diagram of the exploded structure of a watch body in the wearable device shown;

[0031] Figure 3 for Figure 2 A top view of the inner annular outer frame of the watch body shown;

[0032] Figure 4 A three-dimensional diagram of a watch body in a wearable device provided in some other embodiments of the present application;

[0033] Figure 5 for Figure 4 The exploded structural diagram of the watch body shown;

[0034] Figure 6 for Figure 4 A schematic diagram of the cross-sectional structure of the watch body along the AA direction is shown;

[0035] Figure 7 for Figure 6 A simplified diagram of some of the structures in the watch body shown;

[0036] Figure 8 for Figure 7 A simplified diagram of the cross-sectional structure of the reference ground layer, the first annular outer frame portion, the first radiator, the second radiator, the first radio frequency circuit and the second radio frequency circuit in the watch body;

[0037] Fig. 9 for Figure 8 The schematic diagram of the radiation electric field of the cavity antenna on the screen side and the cavity antenna on the bottom shell side in the watch body is shown;

[0038] Fig.10 for Figure 8 The schematic diagram of the structure of the cavity antenna on the screen side of the watch body is shown;

[0039] Fig.11 for Fig.10 The schematic diagram of the equivalent radiation electric field of the screen side cavity antenna at the first radiation gap is shown;

[0040] Fig.12 for Fig.10 The schematic diagram of the actual radiation electric field of the screen side cavity antenna at the first radiation gap is shown;

[0041] Fig.13 A schematic diagram of the actual radiation electric field of the screen-side cavity antenna at the first radiation gap provided in some other embodiments of the present application;

[0042] Fig.14 for Fig.10 A schematic diagram of an orthographic projection of a first radiator and a first annular outer frame portion in the screen-side cavity antenna on a reference plane;

[0043] Fig.15 A simplified structural diagram of a screen-side cavity antenna provided in some other embodiments of the present application;

[0044] Fig.16 A simplified structural diagram of a screen-side cavity antenna provided in some other embodiments of the present application;

[0045] Fig.17 for Fig.10 A top view of the cavity antenna on the screen side is shown;

[0046] Fig.18 for Fig.17 The schematic diagram of the structure of the watch body when it is worn on a human wrist;

[0047] Fig.19 for Fig.17 The graph of input return loss of the internal screen-side cavity antenna versus frequency when the watch body is worn on a human wrist is shown;

[0048] Fig. 20 for Fig.17 The curve diagram of the radiation efficiency of the internal screen-side cavity antenna changing with frequency when the watch body is worn on a human wrist is shown;

[0049] Fig.21 for Figure 8 The schematic diagram of the structure of the cavity antenna on the inner bottom shell side of the watch body is shown;

[0050] Fig. 22 for Fig.21 A schematic diagram of the equivalent radiation electric field of the bottom shell side cavity antenna at the second radiation gap is shown;

[0051] Fig.23 for Fig.21 A schematic diagram of the actual radiation electric field of the bottom shell side cavity antenna at the second radiation gap is shown;

[0052] Fig.24 for Fig.21A bottom view of the cavity antenna on the bottom shell side is shown;

[0053] Fig.25 for Fig.24 The curve diagram of input return loss of the cavity antenna on the inner bottom shell side versus frequency when the watch body is worn on a human wrist is shown;

[0054] Fig.26 for Fig.24 The curve diagram of the radiation efficiency of the cavity antenna on the inner bottom shell side changing with the frequency when the watch body is worn on the human wrist;

[0055] Fig. 27 for Fig.17 Schematic diagram of the electric field radiation pattern of the screen-side cavity antenna;

[0056] Fig.28 for Fig.24 A schematic diagram of the electric field radiation pattern of the bottom shell side cavity antenna shown;

[0057] Fig.29 for Fig.17 The screen side cavity antenna and Fig.24 A schematic diagram showing how the isolation of the bottom shell side cavity antenna changes with frequency;

[0058] Fig.30 Schematic diagram of the cross-sectional structure of a watch body provided for some further embodiments of the present application. DETAILED DESCRIPTION

[0059] In the embodiments of the present application, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0060] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0061] In the embodiments of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0062] The present application provides a wearable device, which includes but is not limited to a smart watch and a smart bracelet.

[0063] See also Figure 1 , Figure 1 A schematic diagram of the structure of a wearable device 100 provided in some embodiments of the present application. In this embodiment and the embodiments below, the wearable device 100 is exemplified as a smart watch, which cannot be considered as a special limitation on the structure of the wearable device 100. The smart watch includes a watch body 10 and a watch strap 20. The watch strap 20 is used to wear the watch body 10 on a human wrist.

[0064] In some embodiments, please refer to Figure 1 The strap 20 may include a first strap portion 201 and a second strap portion 202 , and one end of the first strap portion 201 and one end of the second strap portion 202 are connected to opposite ends of the watch body 10 .

[0065] The other end of the first strap portion 201 is provided with a first locking portion, and the other end of the second strap portion 202 is provided with a second locking portion.

[0066] The first locking portion and the second locking portion are detachably locked to each other so that the watch body 10 can be worn on a human wrist.

[0067] Among them, the matching structure composed of the first locking part and the second locking part can be a buckle structure such as a hook buckle, a concealed buckle, a butterfly buckle, a belt snap buckle, a folding safety buckle, a folding buckle or a pin buckle, and the present application does not make specific limitations on this.

[0068] The following mainly introduces the watch body 10.

[0069] Please continue reading Figure 1 , the watch body 10 is roughly disc-shaped. On this basis, in order to facilitate the description of each embodiment below, an XYZ coordinate system is established for the watch body 10 described in this embodiment and each embodiment below. Specifically, the thickness direction of the watch body 10 is defined as the Z-axis direction, and the plane perpendicular to the Z-axis direction is defined as the XY plane. It can be understood that the coordinate system setting of the watch body 10 can be flexibly set according to actual needs, and no specific limitation is made here.

[0070] In some other embodiments, the watch body 10 may also be roughly in the shape of an elliptical disk, a triangular disk, a polygonal disk, a square disk, or a rectangular disk, which is not specifically limited here.

[0071] Please also read Figure 1 and Figure 2 , Figure 2 for Figure 1 A schematic diagram of the exploded structure of the watch body 10 in the wearable device 100 is shown.

[0072] The watch body 10 includes an annular outer frame 1. The annular outer frame 1 can be in the shape of a circular ring, a square ring, a rectangular ring, an elliptical ring, a triangular ring or a polygonal ring. This embodiment and the following embodiments are exemplified by the annular outer frame 1 being in the shape of a circular ring. The first strap portion 201 and the second strap portion 202 are connected to the annular outer frame 1.

[0073] The annular outer frame 1 is used as a supporting frame of the watch body 10 to support the screen 2 and the bottom shell 3 , and to protect the internal circuit board 4 , battery 01 , vibration motor 02 and speaker 03 .

[0074] The material of the annular outer frame 1 can be selected from metals such as stainless steel, aluminum alloy, magnesium aluminum alloy, etc., to ensure the structural strength of the annular outer frame 1 and the entire device.

[0075] The screen 2 is fixed to one end of the annular outer frame 1 in the axial direction (i.e., in the Z-axis direction). Specifically, the fixing methods of the two include but are not limited to gluing, threading, clamping, and integral molding. The screen 2 has a display surface S1, and the screen 2 uses the display surface S1 to display the dial, hour hand, minute hand, second hand, digital time, weather, temperature, human electrocardiogram (ECG), human body temperature, heart rate, body fat, voltage, and other numerical values ​​or graphics.

[0076] On the basis of the above, the watch body 10 further includes a decorative piece 5. The decorative piece 5 covers the edge area of ​​the display surface S1 of the screen 2 and the end of the annular outer frame 1 facing the screen 2. This can improve the appearance consistency of the watch body 10.

[0077] The bottom shell 3 is fixed to the other axial end of the annular outer frame 1 . Similarly, the fixing methods of the two include but are not limited to gluing, threaded connection, clamping and integral molding.

[0078] The material of the bottom shell 3 can be selected from metal materials such as stainless steel, aluminum alloy, magnesium aluminum alloy, etc., or non-metal materials such as polycarbonate (PC), PC+glass fiber, ABS plastic (acrylonitrile butadiene styrene plastic), etc.

[0079] The annular outer frame 1, the screen 2 and the bottom shell 3 form a containing space, and the circuit board 4, the battery 01, the vibration motor 02 and the speaker 03 are contained in the containing space.

[0080] On the basis of the above, the watch body 10 also includes at least one detection electrode, which includes but is not limited to an ECG detection electrode, a body temperature detection electrode, a heart rate detection electrode, a body fat detection electrode and a voltage detection electrode.

[0081] In some embodiments, the watch body 10 includes a photoplethysmograph, which uses photoplethysmograph (PPG) technology to detect changes in the heart rate of the user being tested.

[0082] The photoplethysmograph includes a light transmitter and a light receiver. When the light transmitter irradiates a light beam of a certain wavelength onto the skin surface of the user being tested, the light beam can be transmitted to the light receiver by reflection. In this process, since the blood volume in the blood vessels fluctuates under the action of cardiac contraction and relaxation, when the heart contracts, the blood volume of the peripheral blood vessels of the heart increases, and the amount of light absorption also increases. Then, the light intensity detected by the light receiver is small; while when the heart relaxes, the blood volume of the peripheral blood vessels of the heart decreases, and the light intensity detected by the light receiver is large. It can be seen that the light intensity detected by the light receiver changes in a pulsating manner. After converting this light intensity change signal into a digital electrical signal, the heart rate of the wearer is obtained. Through the heart rate signal, physiological parameter information such as blood pressure, blood oxygen, brain oxygen, muscle oxygen, blood sugar, pulse rate and respiratory rate of the user being tested can be further obtained.

[0083] The photoplethysmograph is located in the above-mentioned accommodation space. Based on this, please continue to refer to Figure 2 The watch body 10 further includes a light-transmitting cover plate 04, which is disposed on the bottom shell 3. The light-transmitting cover plate 04 allows the light emitted by the light transmitter of the photoplethysmograph to pass through, and allows the light receiver of the photoplethysmograph to receive the light reflected by the human body.

[0084] With the development of technology, in addition to the traditional functions of time display, vital sign data monitoring and display, the wearable device 100 also needs to be equipped with at least one antenna to have functions such as navigation, Bluetooth and calling.

[0085] Among them, the antenna may include but is not limited to global navigation satellite system (GNSS) antenna, bluetooth (BT) antenna, cellular antenna and wireless local area network (WLAN) (such as wireless fidelity (Wi-Fi) network). GNSS antenna is used to realize navigation function, and GNSS antenna may include but is not limited to global positioning system (GPS) antenna, global navigation satellite system (GLONASS) antenna and Beidou navigation satellite system (BDS) antenna. BT antenna is used to realize Bluetooth function. Cellular antenna can be used to realize call function. Cellular antenna can cover 2G, 3G, 4G, 5G, long term evolution (LTE), citizen broadband radio service (CBRS) frequency band and 5G new radio (NR) frequency band range.

[0086] In some embodiments, see Figure 3 , Figure 3 for Figure 2 A top view of the annular outer frame 1 in the watch body 10 is shown. In this embodiment, the annular outer frame 1 is provided with at least two breakpoints along the circumference, so that at least one section of the annular outer frame 1 can be used as a radiator of the antenna to realize the transmission and reception of radio frequency signals.

[0087] For examples, please see Figure 3 The annular outer frame 1 is provided with a first breakpoint a1 and a second breakpoint a2 along the circumferential direction. The first breakpoint a1 and the second breakpoint a2 are filled with dielectric material. The first breakpoint a1 and the second breakpoint a2 separate the annular outer frame 1 into a first outer frame segment 1a and a second outer frame segment 1b. The first outer frame segment 1a is used as a radiator of one antenna, and the second outer frame segment 1b is used as a radiator of another antenna.

[0088] Therefore, the annular outer frame 1 can form at least one antenna radiator by setting breakpoints, and increasing the number of breakpoints can increase the number of antenna radiators and increase the function of the wearable device 100.

[0089] However, the breakpoints will destroy the structural strength of the annular outer frame 1 and the entire device. Moreover, due to the small size of the wearable device 100, the number of radiators that can be set in the annular outer frame 1 is limited, which cannot meet the needs of functional diversification. At the same time, the distance between two adjacent radiators is close, the isolation is small, and the crosstalk is large. In addition, the setting of the breakpoints also affects the appearance consistency of the annular outer frame 1.

[0090] To solve the above problems, see Figure 4-Figure 6 , Figure 4 A three-dimensional diagram of a watch body 10 in a wearable device 100 provided in some other embodiments of the present application, Figure 5 for Figure 4 The exploded structural diagram of the watch body 10 is shown in FIG. Figure 6 for Figure 4 The cross-sectional structure diagram of the watch body 10 along the AA direction is shown.

[0091] In this embodiment, the annular outer frame 1 includes a first annular outer frame portion 11, which is located on the side of the screen 2 facing away from the display surface S1, and the first annular outer frame portion 11 is arranged around the screen 2. The first annular outer frame portion 11 can be the entire annular outer frame 1, or can be a section of the annular outer frame 1 in the axial direction. In this embodiment, the first annular outer frame portion 11 is used as the entire annular outer frame 1 for exemplary description.

[0092] The first annular outer frame portion 11 may be in a circular ring shape. In other embodiments, the first annular outer frame portion 11 may also be in a square ring shape, a rectangular ring shape, an elliptical ring shape, a triangular ring shape, or a polygonal ring shape. This embodiment and the following embodiments are exemplified by the first annular outer frame portion 11 being in a circular ring shape.

[0093] The first annular outer frame portion 11 can be made of conductive metal materials such as stainless steel, aluminum alloy, and magnesium-aluminum alloy.

[0094] The two ends of the first annular outer frame portion 11 along its own axis are respectively a first end D1 and a second end D2. The distance from the first end D1 to the screen 2 is smaller than the distance from the second end D2 to the screen 2. That is, compared with the second end D2, the first end D1 is closer to the screen 2.

[0095] Please continue reading Figure 4-Figure 6 The circuit board 4 may be a hard circuit board, a flexible circuit board, or a hard-soft circuit board. The material of the insulating dielectric layer in the circuit board 4 includes but is not limited to at least one of FR-4 and Rogers. In some embodiments, the circuit board 4 may be a printed circuit board (PCB).

[0096] Please refer to Figure 6The circuit board 4 is located in the area surrounded by the first annular outer frame 11 , and the circuit board 4 is located on the side of the screen 2 facing away from the display surface S1 , and is spaced apart from the screen 2 .

[0097] The shape of the circuit board 4 may be consistent with the contour shape of the area surrounded by the first annular outer frame 11. Specifically, when the contour shape of the area surrounded by the first annular outer frame 11 is circular, the shape of the circuit board 4 is also circular; when the contour shape of the area surrounded by the first annular outer frame 11 is rectangular, the shape of the circuit board 4 is also rectangular; when the contour shape of the area surrounded by the first annular outer frame 11 is triangular, the shape of the circuit board 4 is also triangular.

[0098] The edge of the circuit board 4 may be in direct contact with the inner wall surface of the first annular outer frame portion 11 , and the contacting parts may be arranged continuously along the edge of the circuit board 4 or may be arranged at intervals.

[0099] In some embodiments, along the axial direction of the first annular outer frame portion 11, the circuit board 4 can be located between the first end D1 and the second end D2, and the circuit board 4 and the first end D1, as well as the circuit board 4 and the second end D2 are spaced apart in the axial direction of the first annular outer frame portion 11.

[0100] In this way, on the side of the circuit board 4 facing the screen 2, please refer to Figure 6 , the circuit board 4 and the first annular outer frame portion 11 enclose a first accommodating cavity K1. At the same time, on the side of the circuit board 4 facing the bottom shell 3, the circuit board 4 and the first annular outer frame portion 11 enclose a second accommodating cavity K2. The first accommodating cavity K1 can accommodate a part of the electronic components, and the second accommodating cavity K2 can accommodate another part of the electronic components. In this way, the electronic components in the wearable device 100 can be dispersed on the opposite sides of the circuit board 4, and the circuit board 4 can be a double-sided board, which can improve the utilization rate of the circuit board 4.

[0101] For examples, please see Figure 4-Figure 6 The battery 01, the vibration motor 02 and the speaker 03 can be accommodated in the first accommodation cavity K1. At least part of the detection electrode of the vital sign data and the electrical connection structure between the detection electrode and the circuit board 4 can be accommodated in the second accommodation cavity K2.

[0102] In other embodiments, the circuit board 4 may be located in the area surrounded by the first end D1 or in the area surrounded by the second end D2. This embodiment and the following embodiments are exemplified by arranging the circuit board 4 between the first end D1 and the second end D2 and spaced apart from the first end D1 and the second end D2.

[0103] The watch body 10 further includes a reference layer (not shown in the figure). The reference layer is located in the area surrounded by the first annular outer frame portion 11 .

[0104] In some embodiments, the reference ground layer is disposed on the circuit board 4 .

[0105] Optionally, the circuit board 4 may include a multi-layer stacked structure formed by alternately stacking a plurality of metal layers and a plurality of insulating dielectric layers. Based on this, parts of the plurality of metal layers and metallized vias disposed between the parts form a reference ground layer. In this way, the metal layer inside the multiplexed circuit board 4 forms a reference ground layer, which can reduce the thickness and structural complexity of the entire machine.

[0106] In other embodiments, the reference ground layer may also be a metal sheet or metal plate independent of the circuit board 4, and the present application does not specifically limit this. This embodiment and the following embodiments are exemplified by the reference ground layer consisting of parts of multiple metal layers and metallized vias arranged between the parts.

[0107] The edge of the reference stratum can be electrically connected to the first annular outer frame 11 by means of structures such as welding points, springs and wires.

[0108] Optionally, the electrical connection portion between the reference stratum and the first annular outer frame portion 11 may be located at the edge of the circuit board 4. The edge of the circuit board 4 refers to the portion of the circuit board 4 within 2 cm from the edge of the circuit board 4. In this way, the electrical connection portion does not interfere with the location of the radio frequency circuit and the electronic device on the circuit board 4.

[0109] Of course, in other embodiments, the electrical connection portion between the reference ground layer and the first annular outer frame portion 11 may also be located at the center portion of the circuit board 4. This embodiment and the following embodiments are exemplified by the electrical connection portion between the reference ground layer and the first annular outer frame portion 11 being located at the edge portion of the circuit board 4.

[0110] The electrical connection parts between the reference stratum and the first annular outer frame portion 11 may be arranged continuously along the edge of the circuit board 4 , or may be arranged at intervals along the edge of the circuit board 4 , and this application does not make any specific limitation on this.

[0111] On the basis of the above, please continue to refer to Figure 5 and Figure 6 The watch body 10 further includes a first radiator 6 and a second radiator 7. The first radiator 6 and the second radiator 7 can be made of conductive metal materials such as copper, copper alloy, stainless steel, aluminum alloy, magnesium aluminum alloy, etc.

[0112] The first radiator 6 is disposed on the screen 2. In some embodiments, see Figure 5 and Figure 6The first radiator 6 can be disposed on the surface of the screen 2 facing away from the display surface S1. In this way, the first radiator 6 can be shielded by the screen 2 and the decorative member 5 to ensure the appearance consistency of the whole device without affecting the structural stability of the screen 2.

[0113] In the above embodiment, the first radiator 6 can be glued and fixed to the surface of the screen 2 facing away from the display surface S1, or can be set on the surface of the screen 2 facing away from the display surface S1 by laser direct structuring (LDS) or printing direct structuring (PDS).

[0114] In other embodiments, the first radiator 6 may also be disposed inside the screen 2, or disposed on the side facing the display surface S1 (i.e., the display side of the screen 2). This embodiment and the following embodiments are exemplified by disposing the first radiator 6 on the surface of the screen 2 facing away from the display surface S1.

[0115] Please continue reading Figure 5 and Figure 6 The first radiator 6 can be in the form of a sheet, specifically, a disc, and the first radiator 6 is stacked with the screen 2, which can reduce the thickness of the whole device. In other embodiments, the first radiator 6 can also be in the form of a plate, a block or other irregular shapes.

[0116] The second radiator 7 is disposed on the bottom shell 3. In some embodiments, see Figure 5 and Figure 6 The second radiator 7 is disposed on the surface of the bottom shell 3 facing the circuit board 4 (ie, the inner surface of the bottom shell 3). In this way, the second radiator 7 can be shielded by the bottom shell 3 to ensure the appearance consistency of the whole device.

[0117] Specifically, the second radiator 7 can be glued and fixed to the surface of the bottom case 3 facing the circuit board 4, or can be arranged on the surface of the bottom case 3 facing the circuit board 4 by using the LDS process or the PDS process.

[0118] In other embodiments, the second radiator 7 may also be wrapped inside the material of the bottom shell 3, or may be disposed on the surface of the bottom shell 3 facing away from the circuit board 4 (that is, the outer surface of the bottom shell 3). This embodiment and the following embodiments are exemplified by arranging the second radiator 7 on the surface of the bottom shell 3 facing the circuit board 4.

[0119] In some embodiments, please refer to Figure 5 The second radiator 7 has an escape opening 7a therein, and the escape opening 7a is used to escape the detection electrode.

[0120] The avoidance opening 7a may be in a circular shape. In other embodiments, the avoidance opening 7a may be in a square, triangle, ellipse, polygon, etc. The shape of the avoidance opening 7a may be determined according to the setting area of ​​the detection electrode.

[0121] See also Figure 7 , Figure 7 for Figure 6 A simplified diagram of a part of the structure of the watch body 10 is shown. A first radiation gap g1 is provided between the edge of the first radiator 6 and the end of the first annular outer frame 11 facing the screen 2. The width d1 of the first radiation gap g1 may be greater than or equal to 0.5 mm and less than or equal to 3 mm. Specifically, the width d1 may be 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm.

[0122] A second radiation gap g2 is formed between the edge of the second radiator 7 and the end of the first annular outer frame 11 facing the bottom shell 3. The width d2 of the second radiation gap g2 may be greater than or equal to 0.5 mm and less than or equal to 3 mm. Specifically, the width d2 may also be 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm.

[0123] On the basis of the above, the watch body 10 further includes a first radio frequency circuit (not shown in the figure) and a second radio frequency circuit (not shown in the figure). The first radio frequency circuit and the second radio frequency circuit can be arranged on the circuit board 4, or on other circuit boards of the watch body 10. This embodiment and the following embodiments are exemplified by arranging the first radio frequency circuit and the second radio frequency circuit on the circuit board 4.

[0124] See also Figure 7 The first RF circuit is coupled to the end of the first radiator 6 facing the first annular outer frame 11 . The second RF circuit is coupled to the end of the second radiator 7 facing the first annular outer frame 11 .

[0125] The end of the first radiator 6 facing the first annular outer frame 11 refers to a portion within the first radiator 6 within a range of 5 mm from the edge of the first radiator 6 facing the first annular outer frame 11 .

[0126] Similarly, the end of the second radiator 7 facing the first annular outer frame portion 11 refers to a portion within the second radiator 7 within a range of 5 mm from the edge of the second radiator 7 facing the first annular outer frame portion 11 .

[0127] In addition, the "coupling connection" described in this embodiment and the following embodiments can be understood as a direct coupling connection and / or an indirect coupling connection. Direct coupling connection can also be referred to as "electrical connection", which is understood as the physical contact and electrical conduction between components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit board copper foil or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically conductive in an air-spaced / non-contact manner. In some embodiments, indirect coupling connection can also be referred to as capacitive coupling connection, for example, signal transmission is achieved by forming an equivalent capacitor through coupling between the gaps between two conductive parts.

[0128] In this way, please refer to Figure 8 , Figure 8 for Figure 7 A simplified diagram of the cross-sectional structure of the reference ground layer GND, the first annular outer frame 11, the first radiator 6, the second radiator 7, the first RF circuit TX1 and the second RF circuit TX2 in the watch body 10 is shown.

[0129] The reference ground layer GND and the first annular outer frame portion 11 form a first cavity opening toward the screen. The first radiator 6 is located at the opening of the first cavity. The first radiator 6 and the first cavity form a screen-side cavity antenna ant1.

[0130] The reference ground layer GND and the first annular outer frame portion 11 also form a second cavity opening toward the bottom shell, the second radiator 7 is located at the opening of the second cavity, and the second radiator 7 and the second cavity form a bottom shell side cavity antenna ant2.

[0131] See also Fig. 9 , Fig. 9 for Figure 8 The schematic diagram of the radiation electric field of the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2 in the watch body 10 is shown. When the first RF circuit TX1 feeds the RF signal to the end of the first radiator 6 facing the first annular outer frame 11, it can excite the cavity of the screen side cavity antenna ant1 to produce resonance. The electromagnetic field mode inside the cavity is mainly the TM01 mode. This resonance forms a radiation mode of a specific frequency band at the first radiation gap g1, thereby transmitting the RF signal. In contrast to the process, the screen side cavity antenna ant1 can also receive RF signals.

[0132] Similarly, when the second RF circuit TX2 feeds a RF signal to the end of the second radiator 7 facing the first annular outer frame 11, it can stimulate the cavity of the bottom shell side cavity antenna ant2 to produce resonance. The electromagnetic field mode inside the cavity is mainly the TM01 mode. This resonance forms a radiation mode of a specific frequency band at the second radiation gap g2 to achieve the transmission of RF signals. In contrast to this process, the bottom shell side cavity antenna ant2 can also receive RF signals.

[0133] In this way, by setting a reference stratum in the area surrounded by the first annular outer frame 11, the reference stratum and the first annular outer frame 11 form a first concave cavity opening toward the screen, and a first radiator is set on the screen to construct the screen side cavity antenna ant1, thereby realizing the transmission and reception of a part of the radio frequency signal. The reference stratum also forms a second concave cavity opening toward the bottom shell with the first annular outer frame 11, and a second radiator is set on the bottom shell to construct the bottom shell side cavity antenna ant2, so as to realize the transmission and reception of another part of the radio frequency signal. The screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2 do not need to set breakpoints on the first annular outer frame 11, which can ensure the integrity of the annular structure of the first annular outer frame 11, ensure the structural strength of the annular outer frame 1 and the entire machine, and improve the neatness of the appearance.

[0134] It should be noted that, in the present application, the watch body 10 may be provided with only the screen-side cavity antenna ant1, but not the bottom shell-side cavity antenna ant2, or only the bottom shell-side cavity antenna ant2, but not the screen-side cavity antenna ant1. The above embodiment is an exemplary description of the watch body 10 being provided with both the screen-side cavity antenna ant1 and the bottom shell-side cavity antenna ant2, which cannot be regarded as a special limitation on the present application.

[0135] Based on this, when the electrical connection parts between the reference stratum and the first annular outer frame portion 11 are spaced apart along the edge of the circuit board 4, the distance between two adjacent electrical connection parts along the extension direction of the edge of the circuit board 4 can be much smaller than half of the wavelength corresponding to the maximum operating frequency of the cavity antenna. Specifically, the distance can be less than or equal to one quarter or one eighth of the wavelength corresponding to the maximum operating frequency.

[0136] Among them, when the watch body 10 can be provided with only the above-mentioned screen side cavity antenna ant1, and the above-mentioned bottom shell side cavity antenna ant2 is not provided, the maximum operating frequency of the above-mentioned cavity antenna refers to the maximum operating frequency of the screen side cavity antenna ant1; when the watch body 10 can be provided with only the above-mentioned bottom shell side cavity antenna ant2, and the above-mentioned screen side cavity antenna ant1 is not provided, the maximum operating frequency of the above-mentioned cavity antenna refers to the maximum operating frequency of the bottom shell side cavity antenna ant2; when the watch body 10 is provided with both the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2, the maximum operating frequency of the above-mentioned cavity antenna refers to the maximum operating frequency in the operating frequency set composed of the operating frequency of the screen side cavity antenna ant1 and the operating frequency of the bottom shell side cavity antenna ant2.

[0137] In this way, the radiation efficiency of the screen-side cavity antenna ant1 and / or the bottom shell-side cavity antenna ant2 can be guaranteed.

[0138] The specific structure of the screen side cavity antenna ant1 is first introduced below.

[0139] See also Fig.10 , Fig.10 for Figure 8 The structure diagram of the screen side cavity antenna ant1 inside the watch body 10 is shown.

[0140] See also Fig.11 , Fig.11 for Fig.10 The equivalent radiation electric field schematic diagram of the screen side cavity antenna ant1 at the first radiation gap g1 is shown, in which the first annular outer frame 11 is in a flattened state. The radiation electric field at the first radiation gap g1 is directed from the first annular outer frame 11 to the end of the first radiator 6 facing the first annular outer frame 11.

[0141] In the above embodiment, Fig.12 for Fig.10 The schematic diagram of the actual radiation electric field of the screen side cavity antenna ant1 at the first radiation gap g1 is shown. The radiation electric field at the first radiation gap g1 includes an electric field component in the vertical direction (that is, the Z-axis direction) and an electric field component in the horizontal direction (parallel to the XY plane). When the watch body 10 is worn on a human wrist, generally, the human wrist absorbs less electric field components in the vertical direction and more electric field components in the horizontal direction.

[0142] On the basis of the above, in order to improve the radiation efficiency of the screen side cavity antenna ant1, the vertical electric field component of the radiation electric field at the first radiation gap g1 can be increased, and the horizontal electric field component of the radiation electric field at the first radiation gap g1 can be reduced. To achieve this goal, please return to refer to Fig.10The first radiator 6 and the first annular outer frame portion 11 are spaced apart in the axial direction of the first annular outer frame portion 11 (ie, the Z-axis direction).

[0143] In this way, the first radiator 6 and the first annular outer frame portion 11 have a certain height difference in the Z-axis direction, see Fig.12 The electric field component of the radiation electric field at the first radiation gap g1 is larger in the vertical direction and smaller in the horizontal direction. The electric field radiated outward is mainly in the vertical direction. The human body absorbs less electric field in the vertical direction, which can improve the radiation efficiency of the screen side cavity antenna ant1.

[0144] In the above embodiment, please refer to Fig.10 , the gap width H1 between the first radiator 6 and the first annular outer frame 11 in the axial direction of the first annular outer frame 11 can be greater than 0mm and less than 2mm. Specifically, the gap width H1 can be 0.5mm, 1mm, 1.5mm or 2mm. When the gap width is within this range, the distance between the first radiator 6 and the first annular outer frame 11 in the axial direction of the first annular outer frame 11 is moderate, the radiation efficiency of the screen-side cavity antenna ant1 is better, and it is also conducive to the thinning of the entire machine.

[0145] Of course, in some other embodiments, see Fig.13 , Fig.13 The schematic diagram of the actual radiation electric field of the screen side cavity antenna ant1 at the first radiation gap g1 provided in some embodiments of the present application, the first radiator 6 can also be arranged flush with the first end D1. The radiation electric field at the first radiation gap g1 has a larger electric field component in the horizontal direction, and the electric field radiated is mainly in the horizontal direction, which is conducive to the thinning of the whole machine.

[0146] In some other embodiments, the first radiator 6 may also be located between the first end D1 and the second end D2.

[0147] In some embodiments, please refer back to Fig.10 , define the plane perpendicular to the axial direction of the first annular outer frame portion 11 as the reference plane m. Based on this, please refer to Fig.14 , Fig.14 for Fig.10 The orthographic projection diagram of the first radiator 6 and the first annular outer frame 11 in the screen side cavity antenna ant1 on the reference plane m is shown. The orthographic projection of the first radiator 6 on the reference plane m is the first projection T1, and the orthographic projection of the first annular outer frame 11 on the reference plane m is the second projection T2.

[0148] The first projection T1 is located in the area surrounded by the second projection T2, and the first projection T1 is spaced apart from the second projection T2.

[0149] In this way, the first radiator 6 is opposite to the area surrounded by the first annular outer frame 11, and the edge of the first radiator 6 is inclined relative to the first end D1 of the first annular outer frame 11. Under the premise that the width d1 of the first radiation gap g1 is constant, the gap width H1 between the first radiator 6 and the first annular outer frame 11 in the axial direction of the first annular outer frame 11 can be reduced, which is conducive to the thinning of the whole machine.

[0150] In other embodiments, see Fig.15 , Fig.15 This is a simplified structural diagram of the screen-side cavity antenna ant1 provided in some other embodiments of the present application. The edge of the first radiator 6 may also extend to just above the first end D1.

[0151] In some other embodiments, see Fig.16 , Fig.16 This is a simplified structural diagram of the screen-side cavity antenna ant1 provided in some other embodiments of the present application. The edge of the first radiator 6 may also extend to the periphery of the first end D1.

[0152] With the development of technology, the functions of the wearable device 100 are becoming more and more powerful, and the communication capabilities are becoming stronger and stronger, and there are more and more requirements on the frequency bands that the antenna in the wearable device 100 can cover.

[0153] In order to achieve the above object, in some embodiments, please refer to Fig.17 , Fig.17 for Fig.10 The top view of the screen-side cavity antenna ant1 is shown. The end of the first radiator 6 facing the first annular outer frame 11 is also coupled to the reference ground layer GND or the first annular outer frame 11 through the first lumped parameter element. In other words, the end of the first radiator 6 facing the first annular outer frame 11 is also coupled to the first lumped parameter element, and the first lumped parameter element is coupled to the reference ground layer GND or the first annular outer frame 11.

[0154] The first lumped parameter element includes but is not limited to a capacitor, an inductor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel connection. The first lumped parameter element may be arranged on the circuit board 4 .

[0155] Based on the above, please refer to Fig.17 The position on the first radiator 6 coupled to the first RF circuit TX1 is the first position A1, and the position on the first radiator 6 coupled to the first lumped parameter element is the second position B1. The first position A1 and the second position B1 are spaced apart along the edge of the first radiator 6.

[0156] In this way, by grounding the second position B1, the resonant frequency of the screen side cavity antenna ant1 can be increased, thereby increasing the working frequency band and bandwidth of the screen side cavity antenna ant1. Based on this, the position of the newly added resonant frequency can be adjusted with the help of the first lumped parameter element.

[0157] On the basis of the above, optionally, the end of the first radiator 6 facing the first annular outer frame portion 11 is also coupled to the reference ground layer GND or the first annular outer frame portion 11 through a second lumped parameter element. In other words, the end of the first radiator 6 facing the first annular outer frame portion 11 is also coupled to the second lumped parameter element, and the second lumped parameter element is coupled to the reference ground layer GND or the first annular outer frame portion 11.

[0158] The second lumped parameter element also includes but is not limited to a capacitor, an inductor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel connection. The second lumped parameter element may be arranged on the circuit board 4 .

[0159] Based on the above, please refer to Fig.17 The position on the first radiator 6 that is coupled to the second lumped parameter element is the third position C1 , and the first position A1 , the second position B1 and the third position C1 are sequentially spaced along the edge of the first radiator 6 .

[0160] In this way, by grounding the third position C1, the resonant frequency of the screen side cavity antenna ant1 can be further increased, thereby increasing the working frequency band and bandwidth of the screen side cavity antenna ant1. Based on this, the position of the newly added resonant frequency can be adjusted with the help of the second lumped parameter element.

[0161] In the above embodiment, the first position A1 , the second position B1 , and the third position C1 may be arranged at various positions along the edge of the first radiator 6 .

[0162] In some embodiments, please refer to Fig.17 The central angles of the first position A1 and the second position B1 relative to the central axis of the first annular outer frame 11 are 90°±5° (i.e., 80° to 95°). The central angles of the second position B1 and the third position C1 relative to the central axis of the first annular outer frame 11 are also 90°±5° (i.e., 80° to 95°).

[0163] For examples, please see Fig.17 , the first position A1 may be at 6 o'clock, the second position B1 at 3 o'clock, and the third position C1 at 12 o'clock.

[0164] In this way, the first position A1 , the second position B1 , and the third position C1 are distributed more evenly at the edge of the first radiator 6 , and the first position A1 , the second position B1 , and the third position C1 are conveniently positioned.

[0165] Of course, in some other embodiments, the first position A1, the second position B1 and the third position C1 may also have other distribution methods, and when the central angle of the second position B1 and the first position A1 relative to the central axis of the first annular outer frame 11, and the central angle of the second position B1 and the third position C1 relative to the central axis of the first annular outer frame 11 change, the resonant frequency band of the screen side cavity antenna ant1 can be adjusted to the same target frequency band through the first lumped parameter element and the second lumped parameter element.

[0166] See also Fig.18 , Fig.18 for Fig.17 The structure diagram of the watch body 10 shown is when it is worn on a human wrist 00 . At this time, the cavity antenna ant1 on the screen side is arranged to face away from the human wrist 00 , and the cavity antenna ant2 on the bottom shell side is arranged to face the human wrist 00 .

[0167] See also Fig.19 , Fig.19 for Fig.17 The graph shows the change of input return loss (S11) of the internal screen side cavity antenna ant1 with frequency (Frequency) when the watch body 10 is worn on the human wrist. Fig.19 It can be seen that the working frequency band of the first radiator 6 can include the L1 frequency band of the GPS antenna (frequency band range: 1575±1.023MHz), the L5 frequency band of the GPS antenna (frequency band range: 1176±1.023MHz) and the working frequency band of the BT antenna (frequency band range: 2400MHz~2500MHz), which can realize GPS and BT functions.

[0168] See also Fig. 20 , Fig. 20 for Fig.17 The curve diagram of the radiation efficiency of the internal screen side cavity antenna ant1 as a function of frequency when the watch body 10 is worn on a human wrist is shown. Fig. 20 It can be seen that the radiation efficiency of the screen side cavity antenna ant1 in the L1 band of the GPS antenna, the L5 band of the GPS antenna and the working frequency band of the BT antenna is below -6dB, the radiation efficiency is high, and it can be put into use.

[0169] It should be noted that by adjusting the first lumped parameter element and the second lumped parameter element, the operating frequency band of the screen side cavity antenna ant1 can be adjusted so that the screen side cavity antenna ant1 covers other frequency bands except the GPS antenna and the BT antenna, which is not specifically limited here.

[0170] The specific structure of the bottom shell side cavity antenna ant2 is introduced below.

[0171] See also Fig.21 , Fig.21 for Figure 8 The structure diagram of the cavity antenna ant2 on the bottom shell side of the watch body 10 is shown.

[0172] See also Fig. 22 , Fig. 22 for Fig.21 The schematic diagram of the equivalent radiation electric field of the bottom shell side cavity antenna ant2 at the second radiation gap g2 is shown, in which the first annular outer frame 11 is in a flattened state. The radiation electric field at the second radiation gap g2 is directed from the first annular outer frame 11 to the end of the second radiator 7 facing the first annular outer frame 11.

[0173] In the above embodiment, Fig.23 for Fig.21 The schematic diagram of the actual radiation electric field of the bottom shell side cavity antenna ant2 at the second radiation gap g2 is shown. The radiation electric field at the second radiation gap g2 includes an electric field component in the vertical direction (that is, the Z-axis direction) and an electric field component in the horizontal direction (parallel to the XY plane). When the watch body 10 is worn on a human wrist, the human wrist absorbs less electric field components in the vertical direction, and absorbs more electric fields in the horizontal direction. Based on this, in order to improve the radiation efficiency of the bottom shell side cavity antenna ant2, the electric field component of the radiation electric field at the second radiation gap g2 in the vertical direction can be increased, and the electric field component of the radiation electric field at the second radiation gap g2 in the horizontal direction can be reduced.

[0174] To do this, refer back to Fig.21 The second radiator 7 is located at a side of the second end D2 away from the first end D1, and the second radiator 7 and the first annular outer frame portion 11 are spaced apart in the axial direction of the first annular outer frame portion 11 (ie, the Z-axis direction).

[0175] In this way, the second radiator 7 and the first annular outer frame portion 11 have a certain height difference in the Z-axis direction, see Fig.23 The electric field component of the radiation electric field at the second radiation gap g2 is larger in the vertical direction and smaller in the horizontal direction. The electric field radiated outward is mainly in the vertical direction. The human body absorbs less electric field in the vertical direction, which can improve the radiation efficiency of the bottom shell side cavity antenna ant2.

[0176] In the above embodiment, please refer to Fig.21 , the gap width H2 between the second radiator 7 and the first annular outer frame portion 11 in the axial direction of the first annular outer frame portion 11 can be greater than 0mm and less than 2mm. Specifically, the gap width H2 can be 0.5mm, 1mm, 1.5mm or 2mm. When the gap width is within this range, the distance between the second radiator 7 and the first annular outer frame portion 11 in the axial direction of the first annular outer frame portion 11 is moderate, the radiation efficiency of the bottom shell side cavity antenna ant2 is better, and it is also conducive to the thinning of the whole machine.

[0177] Of course, in some other embodiments, the second radiator 7 can also be arranged flush with the second end D2. In this way, the electric field component of the radiation electric field at the second radiation gap g2 is larger in the horizontal direction, and the electric field radiated is mainly in the horizontal direction, which is conducive to the thinning of the whole device.

[0178] In some other embodiments, the second radiator 7 may also be located between the first end D1 and the second end D2.

[0179] In some embodiments, the orthographic projection of the second radiator 7 on the reference plane m is the third projection.

[0180] The third projection is located in the area surrounded by the second projection T2, and the third projection is also spaced apart from the second projection T2.

[0181] In this way, the second radiator 7 is opposite to the area surrounded by the first annular outer frame portion 11, and the edge of the second radiator 7 is inclined relative to the second end D2 of the first annular outer frame portion 11. Under the premise that the width d2 of the second radiation gap g2 is constant, the gap width H2 between the second radiator 7 and the first annular outer frame portion 11 in the axial direction of the first annular outer frame portion 11 can be reduced, which is conducive to the thinning of the entire machine.

[0182] In other embodiments, the edge of the second radiator 7 may also extend to directly below the second end D2. In still other embodiments, the edge of the second radiator 7 may also extend to the periphery of the second end D2.

[0183] With the development of technology, the functions of the wearable device 100 are becoming more and more powerful, and the communication capabilities are becoming stronger and stronger, and there are more and more requirements on the frequency bands that the antenna in the wearable device 100 can cover.

[0184] In order to achieve the above object, in some embodiments, please refer to Fig.24 , Fig.24 for Fig.21The bottom view of the bottom shell side cavity antenna ant2 is shown. The end of the second radiator 7 facing the first annular outer frame 11 is also coupled to the reference formation GND or the first annular outer frame 11 through the third lumped parameter element. In other words, the end of the second radiator 7 facing the first annular outer frame 11 is also coupled to the third lumped parameter element, and the third lumped parameter element is coupled to the reference formation GND or the first annular outer frame 11.

[0185] The third lumped parameter element includes but is not limited to a capacitor, an inductor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel connection.

[0186] On the basis of the above, please continue to refer to Fig.24 The position on the second radiator 7 coupled to the second RF circuit TX2 is the fourth position A2, and the position on the second radiator 7 coupled to the third lumped parameter element is the fifth position B2. The fourth position A2 and the fifth position B2 are spaced apart along the edge of the second radiator 7.

[0187] In this way, by grounding the fifth position B2, the resonant frequency of the bottom shell side cavity antenna ant2 can be increased, thereby increasing the working frequency band and bandwidth of the bottom shell side cavity antenna ant2. Based on this, the position of the newly added resonant frequency can be adjusted with the help of the third lumped parameter element.

[0188] On the basis of the above, optionally, the end of the second radiator 7 facing the first annular outer frame portion 11 is also coupled to the reference stratum GND or the first annular outer frame portion 11 through a fourth lumped parameter element. In other words, the end of the second radiator 7 facing the first annular outer frame portion 11 is also coupled to the fourth lumped parameter element, and the fourth lumped parameter element is coupled to the reference stratum GND or the first annular outer frame portion 11.

[0189] The fourth lumped parameter element also includes but is not limited to a capacitor, an inductor, or a circuit obtained by connecting one or both of the inductor and the capacitor in parallel, in series, or in series-parallel connection.

[0190] Based on the above, please refer to Fig.24 The position on the second radiator 7 that is coupled to the fourth lumped parameter element is the sixth position C2, and the fourth position A2, the fifth position B2 and the sixth position C2 are sequentially spaced along the edge of the second radiator 7.

[0191] In this way, by grounding the sixth position C2, the resonant frequency of the bottom shell side cavity antenna ant2 can be further increased, thereby increasing the working frequency band and bandwidth of the bottom shell side cavity antenna ant2. Based on this, the position of the newly added resonant frequency can be adjusted with the help of the fourth lumped parameter element.

[0192] In the above embodiment, the fourth position A2 , the fifth position B2 , and the sixth position C2 may be arranged at various positions along the edge of the second radiator 7 .

[0193] In some embodiments, please refer to Fig.24 The central angles of the fourth position A2 and the fifth position B2 relative to the central axis of the first annular outer frame 11 are 90°±5° (i.e., 80° to 95°). The central angles of the fifth position B2 and the sixth position C2 relative to the central axis of the first annular outer frame 11 are also 90°±5° (i.e., 80° to 95°).

[0194] For examples, please see Fig.24 , the fourth position A2 may be at the 9 o'clock position, the fifth position B2 may be at the 12 o'clock position, and the sixth position C2 may be at the 3 o'clock position.

[0195] In this way, the fourth position A2, the fifth position B2 and the sixth position C2 are distributed more evenly at the edge of the second radiator 7, and the fourth position A2, the fifth position B2 and the sixth position C2 are conveniently positioned.

[0196] Of course, in some other embodiments, the fourth position A2, the fifth position B2 and the sixth position C2 may also have other distribution methods, and when the central angles of the fourth position A2 and the fifth position B2 relative to the central axis of the first annular outer frame portion 11, and the central angles of the fifth position B2 and the sixth position C2 relative to the central axis of the first annular outer frame portion 11 change, the resonant frequency band of the bottom shell side cavity antenna ant2 can be adjusted to the same target frequency band through the third lumped parameter element and the fourth lumped parameter element.

[0197] See also Fig.25 , Fig.25 for Fig.24 The graph shows the change of input return loss (S11) of the inner bottom shell side cavity antenna ant2 with frequency (Frequency) when the watch body 10 is worn on the human wrist. Fig.25 It can be seen that the working frequency band of the bottom shell side cavity antenna ant2 may include a low band, a mid band and a high band. Among them, the low band may include B28, B5 and B8 bands, with a frequency range of 700MHz to 960MHz; the mid band may include B1 and B3 bands, with a frequency range of 1710MHz to 2170MHz; the high band may include B40 and B41 bands, with a frequency range of 2300MHz to 2400MHz and 2500MHz to 2700MHz, thereby supporting the call function, specifically supporting the ESIM call function.

[0198] It should be noted that by adjusting the third lumped parameter element and the fourth lumped parameter element, the operating frequency band of the bottom shell side cavity antenna ant2 can be adjusted so that the bottom shell side cavity antenna ant2 covers other frequency bands except low frequency, medium frequency and high frequency, which is not specifically limited here.

[0199] See also Fig.26 , Fig.26 for Fig.24 The curve diagram of the radiation efficiency of the inner bottom shell side cavity antenna ant2 as a function of frequency when the watch body 10 is worn on a human wrist is shown. Fig.26 It can be seen that the radiation efficiency of the bottom shell side cavity antenna ant2 in the low frequency band, medium frequency band and high frequency band is all below -6dB, the radiation efficiency is relatively high, and it can be put into use.

[0200] The above describes in detail the specific structures of the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2. The first annular outer frame 11 is divided into two parts by reference to the stratum, one part forms the side wall of the first cavity, and the other part forms the side wall of the second cavity, thereby physically separating the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2, which can improve the isolation between the two.

[0201] On the basis of the above, in order to further improve the isolation between the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2, along the circumference of the first annular outer frame 11, the first position A1 and the fourth position A2 are spaced apart, and the central angle of the first position A1 and the fourth position A2 relative to the central axis of the first annular outer frame 11 is greater than 0° and less than 180°. In this way, the electric field radiation modes of the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2 intersect, which can improve the isolation between the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2.

[0202] In some embodiments, please refer to Fig.17 and Fig.24 The central angle of the first position A1 and the fourth position A2 relative to the central axis of the first annular outer frame portion 11 is 90°±5° (ie, 80° to 95°).

[0203] In this way, the feeding positions of the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2 differ by approximately 90°. Fig. 27 and Fig.28 , Fig. 27 for Fig.17 The schematic diagram of the electric field radiation pattern of the screen side cavity antenna ant1 is shown. Fig.28 for Fig.24As shown in the schematic diagram of the electric field radiation pattern of the bottom shell side cavity antenna ant2, the electric field radiation patterns of the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2 are orthogonal, which can further improve the isolation between the screen side cavity antenna ant1 and the bottom shell side cavity antenna ant2.

[0204] See also Fig.29 , Fig.29 for Fig.17 The screen side cavity antenna ant1 and Fig.24 The schematic diagram of the change of isolation (S2,1) of the bottom shell side cavity antenna ant2 with frequency (Frequency) is shown. Fig.29 It can be seen that the isolation between the screen-side cavity antenna ant1 and the bottom shell-side cavity antenna ant2 is below -18.24 dB, the isolation is relatively high, and the interference between the two is relatively small.

[0205] It can be known that the radiation performance of the cavity antenna is positively correlated with the height of the internal cavity of the cavity antenna. Specifically, the higher the height of the internal cavity of the cavity antenna, the better the radiation performance.

[0206] Based on this, in some embodiments, please refer to Figure 8 , the distance h1 from the first radiator 6 to the circuit board 4 is greater than the distance h2 from the second radiator 7 to the circuit board 4. In this way, the radiation performance of the screen side cavity antenna ant1 is greater than the radiation performance of the bottom shell side cavity antenna ant2, and the performance of the GPS antenna and the BT antenna is better than that of the ESIM call antenna, which meets the user needs of wearable devices.

[0207] See also Fig.30 , Fig.30 The schematic diagram of the cross-sectional structure of the watch body 10 provided in some other embodiments of the present application. In this embodiment, the first radiator 6 includes a first main body portion 61 and a second annular outer frame portion 62 .

[0208] The first main body 61 is disposed on a surface of the screen 2 that is opposite to the display surface S1 .

[0209] In the above embodiment, the first main body 61 can be glued and fixed to the surface of the screen 2 facing away from the display surface S1 , or can be arranged on the surface of the screen 2 facing away from the display surface S1 by using the LDS process or the PDS process.

[0210] Please continue reading Fig.30 The first main body 61 can be in the shape of a sheet, specifically, a disc, and the first main body 61 is stacked with the screen 2, so that the thickness of the whole device can be reduced. In other embodiments, the first main body 61 can also be in the shape of a plate, a block or other irregular shapes.

[0211] Please continue reading Fig.30 The second annular outer frame portion 62 and the screen 2 are located on the same side of the first annular outer frame portion 11 in the axial direction, and the second annular outer frame portion 62 is coaxial with the first annular outer frame portion 11 and is spaced apart from the first annular outer frame portion 11 in the axial direction.

[0212] On the basis of the above, the first main body portion 61 is located in the area surrounded by the second annular outer frame portion 62 , and the edge of the first main body portion 61 is electrically connected to the second annular outer frame portion 62 .

[0213] Specifically, the edge of the first body 61 can be electrically connected to the second annular outer frame 62 by means of welding points, springs, wires and other structures, or can be integrally formed with the second annular outer frame 62. This embodiment is exemplified by the integral formation of the first body 61 and the second annular outer frame 62.

[0214] In this way, the first radiator 6, the first annular outer frame 11 and the reference stratum also form a screen-side cavity antenna ant1, and the first radiation gap g1 is located between the second annular outer frame 62 and the first annular outer frame 11, which can also realize the transmission and reception of radio frequency signals.

[0215] In the above embodiment, the wearable device 100 further includes a first dielectric layer, and the material of the first dielectric layer includes but is not limited to at least one of mica, porcelain, rubber, paper and polystyrene. The first dielectric layer is disposed in the gap between the first annular outer frame portion 11 and the second annular outer frame portion 62 (that is, the first radiation gap g1), which can ensure the structural integrity of the outer frame 1.

[0216] Likewise, please continue to read Fig.30 The second radiator 7 may include a second main body portion 71 and a third annular outer frame portion 72 .

[0217] The second main body portion 71 is disposed on a surface of the bottom case 3 facing the circuit board 4 (ie, the inner surface of the bottom case 3 ).

[0218] Specifically, the second main body portion 71 may be glued and fixed to the surface of the bottom case 3 facing the circuit board 4 , or may be arranged on the surface of the bottom case 3 facing the circuit board 4 by means of an LDS process or a PDS process.

[0219] The third annular outer frame portion 72 is located on a side of the first annular outer frame portion 11 facing away from the screen, and the third annular outer frame portion 72 is coaxial with the first annular outer frame portion 11 and spaced apart in the axial direction of the first annular outer frame portion 11 .

[0220] On the basis of the above, the second main body portion 71 is located in the area surrounded by the third annular outer frame portion 72 , and the edge of the second main body portion 71 is electrically connected to the third annular outer frame portion 72 .

[0221] Specifically, the edge of the second body 71 can be electrically connected to the third annular outer frame 72 by means of welding points, springs, wires and other structures, or can be integrally formed with the third annular outer frame 72. This embodiment is exemplified by the second body 71 and the third annular outer frame 72 being integrally formed.

[0222] In this way, the second radiator 7, the first annular outer frame 11 and the reference stratum also form a bottom shell side cavity antenna ant2, and the second radiation gap g2 is located between the third annular outer frame 72 and the first annular outer frame 11, which can also realize the transmission and reception of radio frequency signals.

[0223] In the above embodiment, the wearable device 100 further includes a second dielectric layer, and the material of the second dielectric layer includes but is not limited to at least one of mica, porcelain, rubber, paper and polystyrene. The second dielectric layer is disposed in the gap between the first annular outer frame portion 11 and the third annular outer frame portion 72 (that is, the second radiation gap g2), which can ensure structural integrity.

[0224] In some embodiments, the first annular outer frame portion 11, the second annular outer frame portion 62, the third annular outer frame portion 72, the first dielectric layer and the second dielectric layer can form the annular outer frame 1. This structure is simple and has good structural strength.

[0225] In some embodiments, the distance h1 from the first main body 61 to the circuit board 4 is greater than the distance h2 from the second main body 71 to the circuit board 4. In this way, the radiation performance of the screen-side cavity antenna ant1 is greater than the radiation performance of the bottom shell-side cavity antenna ant2, and the performance of the GPS antenna and the BT antenna is better than that of the ESIM call antenna, which meets the user needs of wearable devices.

[0226] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0227] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A wearable device, characterized in that: include: A screen having a display surface; A first annular outer frame portion, the first annular outer frame portion is located on a side of the screen facing away from the display surface and is arranged around the screen; A reference stratum, wherein the reference stratum is located in the area surrounded by the first annular outer frame, and an edge of the reference stratum is electrically connected to the first annular outer frame; A first radiator, the first radiator is arranged on the screen and is spaced apart from the reference stratum in the axial direction of the first annular outer frame, and a first radiation gap is formed between an edge of the first radiator and an end of the first annular outer frame facing the screen; A first radio frequency circuit is coupled to an end of the first radiator facing the first annular outer frame.

2. The wearable device according to claim 1, characterized in that: The first radiator and the first annular outer frame are spaced apart from each other in the axial direction of the first annular outer frame.

3. The wearable device according to claim 1 or 2, characterized in that: The screen comprises a display surface, and the first radiator is arranged on a surface of the screen facing away from the display surface.

4. The wearable device according to claim 3, characterized in that: A plane perpendicular to the axial direction of the first annular outer frame portion is a reference plane; The orthographic projection of the first radiator on the reference plane is a first projection, and the orthographic projection of the first annular outer frame on the reference plane is a second projection; The first projection is located in a region surrounded by the second projection, and the first projection is spaced apart from the second projection.

5. The wearable device according to claim 1 or 2, characterized in that: The first radiator includes a first main body portion and a second annular outer frame portion; The screen comprises a display surface, and the first main body is arranged on a surface of the screen facing away from the display surface; The second annular outer frame portion and the screen are located on the same side of the first annular outer frame portion in the axial direction, and the second annular outer frame portion is coaxial with the first annular outer frame portion and is spaced apart in the axial direction of the first annular outer frame portion; The first main body is located in a region surrounded by the second annular outer frame, and an edge of the first main body is electrically connected to the second annular outer frame.

6. The wearable device according to claim 5, characterized in that: Also includes: A first dielectric layer is disposed in a gap between the first annular outer frame portion and the second annular outer frame portion.

7. The wearable device according to any one of claims 1 to 6, characterized in that: The end of the first radiator facing the first annular outer frame is coupled to the reference ground layer or the first annular outer frame through a first lumped parameter element; The position on the first radiator coupled to the first RF circuit is a first position, the position on the first radiator coupled to the first lumped parameter element is a second position, and the first position and the second position are spaced apart along the edge of the first radiator.

8. The wearable device according to claim 7, characterized in that: The end of the first radiator facing the first annular outer frame is also coupled to the reference ground layer or the first annular outer frame through a second lumped parameter element; The position on the first radiator that is coupled to the second lumped parameter element is a third position, and the first position, the second position and the third position are sequentially spaced along the edge of the first radiator.

9. The wearable device according to claim 8, characterized in that: The central angles of the first position and the second position relative to the central axis of the first annular outer frame portion are 90°±5°, and the central angles of the second position and the third position relative to the central axis of the first annular outer frame portion are 90°±5°.

10. The wearable device according to claim 8 or 9, characterized in that: The working frequency band of the first radiator includes 1575±1.023 MHz, 1176±1.023 MHz and 2400 MHz to 2500 MHz.

11. The wearable device according to any one of claims 1 to 10, characterized in that: Also includes: A bottom shell, the bottom shell being located on a side of the first annular outer frame portion facing away from the screen; A second radiator, the second radiator is arranged on the bottom shell and is spaced apart from the reference ground layer in the axial direction of the first annular outer frame, and a second radiation gap is formed between an edge of the second radiator and one end of the first annular outer frame facing the bottom shell; A second radio frequency circuit is coupled to the end of the second radiator facing the first annular outer frame.

12. The wearable device according to claim 11, characterized in that: The second radiator and the first annular outer frame are spaced apart from each other in the axial direction of the first annular outer frame.

13. The wearable device according to claim 11 or 12, characterized in that: The second radiator is arranged on a surface of the bottom shell facing the reference ground layer.

14. The wearable device according to claim 11 or 12, characterized in that: The second radiator includes a second main body portion and a third annular outer frame portion; The second main body is arranged on a surface of the bottom shell facing the reference stratum; The third annular outer frame portion is located on a side of the first annular outer frame portion facing away from the screen, and the third annular outer frame portion is coaxial with the first annular outer frame portion and is spaced apart in the axial direction of the first annular outer frame portion; The second main body is located in the area surrounded by the third annular outer frame, and an edge of the second main body is electrically connected to the third annular outer frame.

15. The wearable device according to any one of claims 11 to 14, characterized in that: The position on the second radiator coupled to the second radio frequency circuit is a fourth position; Along the circumference of the first annular outer frame portion, the fourth position is spaced apart from the first position, and a central angle between the fourth position and the first position relative to a central axis of the first annular outer frame portion is 90°±5°.

16. The wearable device according to claim 15, characterized in that: The end of the second radiator facing the first annular outer frame is also coupled to the reference ground layer or the first annular outer frame through a third lumped parameter element; The position on the second radiator that is coupled to the third lumped parameter element is the fifth position, and the fourth position and the fifth position are arranged at intervals along the edge of the second radiator.

17. The wearable device according to claim 16, characterized in that: The end of the second radiator facing the first annular outer frame is also coupled to the reference ground layer or the first annular outer frame through a fourth lumped parameter element; The position on the second radiator that is coupled to the fourth lumped parameter element is the sixth position, and the fourth position, the fifth position and the sixth position are sequentially spaced apart along the edge of the second radiator.

18. The wearable device according to claim 17, characterized in that: The central angles of the fourth position and the fifth position relative to the central axis of the first annular outer frame portion are 90°±5°, and the central angles of the fifth position and the sixth position relative to the central axis of the first annular outer frame portion are 90°±5°.

19. The wearable device according to any one of claims 11 to 18, characterized in that: The operating frequency bands of the second radiator include 700MHz to 960MHz, 1710MHz to 2170MHz, 2300MHz to 2400MHz and 2500MHz to 2700MHz.

20. The wearable device according to any one of claims 1 to 19, characterized in that: Also includes: A circuit board is located in the area surrounded by the first annular outer frame, and the circuit board includes a multi-layer stacking structure formed by alternating multiple metal layers and multiple insulating medium layers in sequence, and parts of the multiple metal layers and metallized vias connected between the parts form the reference ground layer.

Images