Antenna device, smart ring, and wearable electronic device

Abstract

The application provides an antenna device, a smart ring and a wearable electronic device, and belongs to the technical field of wearable devices. Multiple printed circuit boards and multiple flexible circuit boards are arranged at intervals and connected to each other, which can match metal shells of different shapes and reduce the occupied space. The antenna conductive structure arranged in the flexible circuit board is arranged independently relative to the metal shell, so that a structural capacitance is formed between the antenna conductive structure and the metal shell, the coupling connection between the two is realized, and the occupied space is small. The signals on the multiple printed circuit boards can be coupled to the metal shell through the multiple flexible circuit boards and the antenna conductive structure, so that the metal shell emits signals as a radiator of the antenna. The metal shell receives external signals as a receiver of the antenna, is coupled to the antenna conductive structure, and is transmitted to the multiple printed circuit boards through the multiple flexible circuit boards. The device can realize the communication function, the occupied space is small, and the problem of large occupied space of the traditional antenna structure is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of wearable technology, and particularly relates to an antenna device, a smart ring and a wearable electronic device. BACKGROUND

[0002] A wearable electronic device is a portable electronic device directly worn on the body or integrated into the clothes or accessories of a user, such as a smart ring, a smart watch, a smart bracelet, a smart earphone, an augmented reality head-mounted device and a virtual reality head-mounted device. With the development of science and technology, the wearable electronic device has the advantages of portability, dexterity, novelty, real-time and interactivity, and is increasingly favored by users.

[0003] An antenna in a wearable electronic device is a core component for realizing a wireless communication function, and determines the communication quality and user experience of the device. However, in a traditional device, the antenna structure occupies a large space, resulting in limitations on the size and shape of the wearable electronic device. SUMMARY

[0004] The present application aims to provide an antenna device, a smart ring and a wearable electronic device, and aims to solve the problem of a large space occupied by the antenna structure in a traditional device.

[0005] The present application provides an antenna device, comprising:

[0006] A metal shell, constituting a radiator and a receiver of an antenna;

[0007] A plurality of flexible circuit boards and a plurality of printed circuit boards connected to each other, arranged in the metal shell;

[0008] The plurality of printed circuit boards and the plurality of flexible circuit boards are arranged at intervals;

[0009] An antenna conductive structure arranged in the flexible circuit board, and the antenna conductive structure is connected to the adjacent printed circuit board, and the antenna conductive structure is arranged independently relative to the metal shell.

[0010] In some embodiments, the printed circuit board is provided with an antenna matching circuit connected to the antenna conductive structure, for adjusting an antenna resonance point.

[0011] In an embodiment, the antenna feed point and the ground feed point of the antenna conductive structure are connected to the antenna matching circuit through a buried hole process or a via hole process, respectively.

[0012] In some embodiments, the flexible circuit board is arranged between two adjacent printed circuit boards;

[0013] The length of the flexible circuit board provided with the antenna conductive structure is greater than the length of the flexible circuit board without the antenna conductive structure.

[0014] In some embodiments, the metal shell is integrally formed, and an inner wall of the metal shell encloses a closed accommodation space;

[0015] The plurality of flexible circuit boards, the plurality of printed circuit boards, and the antenna conductive structure are arranged in the closed accommodation space.

[0016] In some embodiments, the antenna conductive structure is connected to the metal shell through an insulating layer of the flexible circuit board.

[0017] The present application provides a smart ring, which comprises the antenna device in any one of the above embodiments, and the metal shell of the antenna device is at least part of the annular metal shell of the smart ring.

[0018] In some embodiments, the plurality of printed circuit boards and the plurality of flexible circuit boards of the antenna device are arranged in a spaced manner to form an annular circuit board.

[0019] The flexible circuit board at one end of the annular circuit board is provided with an antenna conductive structure, and the annular circuit board is arranged in the annular metal shell.

[0020] In some embodiments, the smart ring further comprises:

[0021] A battery is arranged in the closed accommodation space formed by the annular metal shell, and the battery is connected to the printed circuit board at the other end of the annular circuit board.

[0022] The flexible circuit board provided with the antenna conductive structure is at least partially overlapped with the battery.

[0023] In some embodiments, the smart ring further comprises a battery protection circuit.

[0024] The battery protection circuit is arranged on the printed circuit board (220) away from the antenna conductive structure, and the battery protection circuit is connected to the battery for protecting the battery.

[0025] The present application provides a wearable electronic device, which comprises the antenna device in any one of the above embodiments.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The plurality of printed circuit boards and the plurality of flexible circuit boards are arranged at intervals and connected to each other, and a soft and hard combined circuit board can be formed. The plurality of flexible circuit boards have flexibility, can break through the space limitation by the flexible material and bendable characteristics thereof, and can realize structural deformation. The plurality of printed circuit boards can be bent and deformed in the case that the plurality of flexible circuit boards are bent, and can then match metal shells of different shapes. Thus, the plurality of flexible circuit boards and the plurality of printed circuit boards can better fit the metal shells and reduce the occupied space.

[0028] The antenna conductive structure is arranged in the flexible circuit board and connected to the printed circuit board, realizes the connection among the antenna conductive structure, the flexible circuit board and the printed circuit board, can realize the transmission of signals among each other, does not need to rely on external auxiliary hardware structures to realize the connection, and improves the reliability of the connection.

[0029] The antenna conductive structure arranged in the flexible circuit board is relatively independently arranged with the metal shell, so that a structural capacitor with air or an insulating layer as a medium is formed between the antenna conductive structure and the metal shell. By relatively independently arranging the antenna conductive structure and the metal shell, the antenna conductive structure serves as one electrode of the structural capacitor, and the metal shell serves as another electrode of the structural capacitor, so that the coupling connection between the two can be realized, and the occupied space is reduced.

[0030] Further, the structural capacitor formed between the antenna conductive structure and the metal shell can enable the antenna conductive structure and the metal shell to realize the coupling connection. Signals on the plurality of printed circuit boards can be coupled to the metal shell through the plurality of flexible circuit boards and the antenna conductive structure, so that the metal shell serves as a radiator of the antenna to emit signals outward to realize the communication function. Meanwhile, the metal shell can serve as a receiver of the antenna to receive external signals and couple the external signals to the antenna conductive structure, and the external signals are transmitted to the plurality of printed circuit boards through the antenna conductive structure and the plurality of flexible circuit boards. Thus, the antenna device provided in the application can realize the communication function, does not need to use the structure in which the antenna needs to be connected to the shell by a thimble or a metal spring and a slot, and solves the problem that the antenna structure occupies a large space in the conventional device.

[0031] Further, the antenna conductive structure and the metal shell are relatively independently arranged, the relative positions are stable and are not easily changed by external factors, so that the coupling connection between the antenna conductive structure and the metal shell is more stable and reliable, the communication quality of the antenna is ensured, and the influence of external factors is reduced.

[0032] The antenna conductive structure is arranged independently from the metal shell to realize coupling connection, without needing to open a slot or preset a gap on the metal shell, and the integrity of the metal shell is ensured. The antenna device provided in the application can not only meet the communication function but also maintain the integrity of the metal shell, and can also solve the problem of large space occupied by the antenna and the connection structure thereof in the traditional device. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0034] Figure 1 The overall structure schematic diagram of the antenna device in some embodiments provided in the present application.

[0035] Figure 2 The connection structure schematic diagram of the plurality of flexible circuit boards, the plurality of printed circuit boards and the antenna conductive structure in some embodiments provided in the present application.

[0036] Figure 3 The connection structure schematic diagram of the plurality of flexible circuit boards, the plurality of printed circuit boards and the antenna conductive structure in some embodiments provided in the present application.

[0037] Figure 4 The position structure schematic diagram of the metal shell and the antenna conductive structure in some embodiments provided in the present application.

[0038] Figure 5 The schematic diagram of the capacitance formed by the metal shell and the antenna conductive structure in some embodiments provided in the present application.

[0039] Figure 6 The structure schematic diagram of the closed accommodation space of the metal shell in some embodiments provided in the present application.

[0040] Figure 7 The overall structure schematic diagram of the metal shell of the smart ring in some embodiments provided in the present application.

[0041] Figure 8 The front view of the smart ring in some embodiments provided in the present application.

[0042] Figure 9 The side view of the smart ring in some embodiments provided in the present application.

[0043] Figure 10Fig. 1 shows a schematic diagram of a connection structure of a plurality of flexible circuit boards, a plurality of printed circuit boards, an antenna conductive structure, and a battery in some embodiments of the present application.

[0044] Figure 11 Fig. 2 shows a schematic diagram of a structure of a ring-shaped circuit board in some embodiments of the present application.

[0045] Figure 12 Fig. 3 shows a schematic diagram of an internal overall structure of a smart ring in some embodiments of the present application.

[0046] Figure 13 Fig. 4 shows an antenna return loss diagram of an antenna device in some embodiments of the present application. DETAILED DESCRIPTION

[0047] In order to make the technical problems solved by the present application, the technical solutions and the beneficial effects clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0048] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In addition, in the embodiments of the present application, the same items or similar items with substantially the same functions and effects are distinguished by "first", "second", etc. The skilled in the art can understand that "first", "second", etc. do not limit the number and execution order, and "first", "second", etc. also do not necessarily mean different.

[0051] In the description of the present application, unless otherwise specified, " / " represents that the objects before and after the correlation are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the present application is only a description of the correlation of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone, where A, B can be singular or plural. And, in the description of the present application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or the like means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple.

[0052] See Figure 1 The present application provides an antenna device. The antenna device includes a metal shell 10, a plurality of flexible circuit boards 210, a plurality of printed circuit boards 220, and an antenna conductive structure 30. The metal shell 10 constitutes a radiator and a receiver of the antenna. The plurality of flexible circuit boards 210 and the plurality of printed circuit boards 220 connected to each other are arranged in the metal shell 10.

[0053] See Figure 2 With Figure 3 The plurality of printed circuit boards 220 and the plurality of flexible circuit boards 210 are arranged in a spaced manner. The antenna conductive structure 30 is arranged in the flexible circuit board 210. The antenna conductive structure 30 is connected to the adjacent printed circuit board 220. The antenna conductive structure 30 is arranged independently relative to the metal shell 10.

[0054] In the embodiment, the plurality of flexible circuit boards (Flexible Printed Circuit Board, FPC) 210, the plurality of printed circuit boards (Printed Circuit Board, PCB) 220, and the antenna conductive structure 30 are arranged in the metal shell 10. The plurality of printed circuit boards 220 and the plurality of flexible circuit boards 210 are arranged in a spaced manner and connected to each other, and can form a soft and hard combined circuit board. The plurality of flexible circuit boards 210 have flexibility, can break through the space limitation by their own flexible material and bendable characteristics, and can realize structure deformation. The plurality of printed circuit boards 220 can be bent and deformed in the case of bending of the plurality of flexible circuit boards 210 by connecting the plurality of flexible circuit boards 210, and can match metal shells 10 of different shapes. Thus, the plurality of flexible circuit boards 210 and the plurality of printed circuit boards 220 can better fit the metal shell 10, reducing the occupied space.

[0055] The antenna conductive structure 30 is arranged in the flexible circuit board 210 and connected with the adjacent printed circuit board 220, realizing the connection among the antenna conductive structure 30, the flexible circuit board 210 and the printed circuit board 220, and enabling the transmission of signals among them without relying on external auxiliary hardware structure to realize the connection, thereby improving the reliability of the connection.

[0056] The antenna conductive structure 30 arranged in the flexible circuit board 210 is arranged relatively independently from the metal shell 10, so that a structure capacitance with air or an insulating layer as a medium is formed between the antenna conductive structure 30 and the metal shell 10, as shown in Figure 4 and Figure 5 The antenna conductive structure 30 and the metal shell 10 are arranged relatively independently to form a structure capacitance C = ε * S / (4πkD). Wherein, ε represents the dielectric constant of the medium between the antenna conductive structure 30 and the metal shell 10, S represents the opposite area of the antenna conductive structure 30 and the metal shell 10, and D represents the distance between the antenna conductive structure 30 and the metal shell 10. It can be seen that, by arranging the antenna conductive structure 30 and the metal shell 10 relatively independently, the antenna conductive structure 30 serves as one electrode of the structure capacitance, and the metal shell 10 serves as the other electrode of the structure capacitance, so that the coupling connection between them can be realized, and the occupied space is reduced.

[0057] Further, the structure capacitance formed between the antenna conductive structure 30 and the metal shell 10 enables the coupling connection of the antenna conductive structure 30 and the metal shell 10. The signals on the plurality of printed circuit boards 220 can be coupled to the metal shell 10 through the plurality of flexible circuit boards 210 and the antenna conductive structure 30, so that the metal shell 10 serves as a radiator of the antenna to emit signals outward to realize the communication function. At the same time, by taking the metal shell 10 as a receiver of the antenna, external signals can be received and coupled to the antenna conductive structure 30, and then transmitted to the plurality of printed circuit boards 220 through the antenna conductive structure 30 and the plurality of flexible circuit boards 210. Therefore, by using the antenna device provided in the present application, the communication function can be realized without using the structure of the traditional device in which the antenna needs to be connected with the shell through a thimble or a metal spring and a slot, thereby solving the problem of large occupied space of the antenna structure in the traditional device.

[0058] Further, the antenna conductive structure 30 and the metal shell 10 are arranged relatively independently, the relative position is stable and not easily changed by external factors, so that the coupling connection of the antenna conductive structure 30 and the metal shell 10 is more stable and reliable, thereby ensuring the communication quality of the antenna and reducing the influence of external factors.

[0059] And, the antenna conductive structure 30 is arranged relatively independently from the metal shell 10 to achieve coupling connection, without the need to open a slot or preset a gap on the metal shell 10, ensuring the integrity of the metal shell 10. The antenna device provided in the present application not only can meet the communication function but also can maintain the integrity of the metal shell 10, and can solve the problem of large space occupied by the antenna and its connection structure in the conventional device.

[0060] In some embodiments, the antenna conductive structure 30 is a metal trace etched on the flexible circuit board 210, which can be copper, aluminum or gold.

[0061] In some embodiments, the printed circuit board 220 is provided with an antenna matching circuit, which is connected with the antenna conductive structure 30 and used to adjust the antenna resonance point.

[0062] In the present embodiment, the antenna conductive structure 30 is arranged relatively independently from the metal shell 10, so that a structure capacitance with air or an insulating layer as a medium is formed between the antenna conductive structure 30 and the metal shell 10. The structure capacitance C formed by the relative independent arrangement of the antenna conductive structure 30 and the metal shell 10 is C = ε * S / (4πkD). By adjusting the dielectric constant ε, the facing area S of the antenna conductive structure 30 and the metal shell 10, and the distance D between the antenna conductive structure 30 and the metal shell 10, the capacitance parameter formed by the antenna conductive structure 30 and the metal shell 10 can be adjusted.

[0063] The antenna matching circuit is connected with the antenna conductive structure 30, which can be understood as that one electrode of the antenna matching circuit is connected with the structure capacitance. The antenna matching circuit includes one or more of resistors, capacitors and inductors. Different combinations of resistors, capacitors and inductors can achieve switching between different frequency bands. Further, by connecting the antenna conductive structure 30 with the antenna matching circuit, the structure capacitance formed by the antenna conductive structure 30 and the antenna matching circuit and the antenna matching circuit can be adjusted in cooperation with each other, so as to adjust the resonance point of the antenna device, meet the frequency and efficiency requirements of different frequency bands, and realize wireless communication in the target frequency band, thereby improving the quality of wireless communication.

[0064] Further, the printed circuit board 220 has high hardness and is not easy to deform. By arranging the antenna matching circuit on the printed circuit board 220, the resistors, capacitors and inductors and other elements in the antenna matching circuit are not easy to loosen after welding, so that the arrangement of the antenna matching circuit is more stable and can effectively resist the vibration and external force impact caused by external factors.

[0065] In some embodiments, the antenna matching circuit includes a switch chip and a plurality of frequency band circuits. The antenna matching circuit can be arranged on the same printed circuit board 220 or on different printed circuit boards 220, which can be adjusted according to the actual application scenario. By switching different antenna switches through the switch chip in the antenna matching circuit, different frequency band circuits can be selected to realize the transmission and reception of signals of different frequency bands.

[0066] In some embodiments, the operating frequency band of the antenna device can be a Bluetooth frequency band of 2.4 GHz to 2.5 GHz, an ultra-high frequency band of 860 MHz to 960 MHz, a near field communication frequency band of 13.56 MHz, etc., which can be adjusted according to the actual application scenario.

[0067] In some embodiments, various elements that can realize the functions required by wearable electronic devices (such as smart rings, smart watches, smart bracelets, smart earphones, augmented reality head-mounted devices, and virtual reality head-mounted devices, etc.) can also be arranged on the plurality of printed circuit boards 220 and the plurality of flexible circuit boards 210.

[0068] In some embodiments, the antenna feed point 310 and the ground feed point 320 of the antenna conductive structure 30 are connected to the antenna matching circuit through a via hole process or a buried hole process, as shown in FIGS. 11 and 12. Figure 2 and Figure 3 .

[0069] In this embodiment, the antenna feed point 310 can be understood as an input point or an output point of a signal. The ground feed point 320 can be understood as providing a reference low potential, which cooperates with the antenna feed point 310 to ensure that the antenna device can work normally.

[0070] The antenna conductive structure 30 is coupled to the metal shell 10, and the signal transmission and reception can be realized through the metal shell 10. Further, by arranging the antenna feed point 310 on the antenna conductive structure 30, the signal received by the metal shell 10 can be transmitted to the antenna matching circuit arranged on the printed circuit board 220 to realize the reception of signals of different frequency bands. By arranging the antenna feed point 310 on the antenna conductive structure 30, the signals of different frequency bands selected by the antenna matching circuit arranged on the printed circuit board 220 can also be transmitted to the metal shell 10 through the antenna feed point 310, so that the metal shell 10 transmits signals of different frequency bands.

[0071] The antenna conductive structure 30 and the antenna matching circuit arranged on the printed circuit board 220 are connected through a via hole process or a buried hole process, which can realize the communication function, removes the spring or thimble connection structure between the antenna feed point and the mainboard in the traditional device, saves the occupied space and cost, improves the space utilization, and does not limit the size and shape of the wearable electronic device.

[0072] Further, the antenna feeding point 310 and the ground feeding point 320 of the antenna conductive structure 30 are connected with the antenna matching circuit through the via hole process or the buried hole process, which can reduce the loss in the signal transmission process, ensure the integrity of the transmission signal, and improve the communication quality of the antenna device. Moreover, the connection through the via hole process or the buried hole process can avoid the fracture caused by the vibration impact of external factors, and is more stable and reliable than the connection mode of the traditional equipment such as the thimble or the metal spring.

[0073] In some embodiments, a flexible circuit board 210 is arranged between two adjacent printed circuit boards 220. The length of the flexible circuit board 210 provided with the antenna conductive structure 30 is greater than the length of the flexible circuit board 210 without the antenna conductive structure 30.

[0074] In this embodiment, a flexible circuit board 210 is arranged between two adjacent printed circuit boards 220, so that a soft and hard staggered circuit board structure is formed between the plurality of printed circuit boards 220 and the plurality of flexible circuit boards 210. The connection between the two adjacent printed circuit boards 220 through the flexible circuit board 210 can solve the problem that the two adjacent printed circuit boards 220 are not easy to deform. Therefore, by arranging the flexible circuit board 210 between the two adjacent printed circuit boards 220, the soft and hard staggered circuit board structure formed between the plurality of printed circuit boards 220 and the plurality of flexible circuit boards 210 can better match the metal shell 10 of different shapes, so as to better fit the metal shell 10 and reduce the occupied space.

[0075] The length of the flexible circuit board 210 provided with the antenna conductive structure 30 is greater than the length of the flexible circuit board 210 without the antenna conductive structure 30, which can ensure that there is enough space to form the antenna conductive structure 30 when etching the antenna conductive structure 30 on the flexible circuit board 210, which is conducive to forming the required structural capacitance with the metal shell 10. Further, the length of the flexible circuit board 210 without the antenna conductive structure 30 can be reduced, which is conducive to ensuring the flexible connection of the two adjacent printed circuit boards 220 while ensuring that the occupied space is small and the cost is saved.

[0076] Please refer to Figure 6 In some embodiments, the metal shell 10 is integrally formed. The inner wall of the metal shell 10 surrounds to form a closed accommodation space 110. The plurality of flexible circuit boards 210, the plurality of printed circuit boards 220, and the antenna conductive structure 30 are arranged in the closed accommodation space 110.

[0077] In the embodiment, the metal shell 10 is integrally formed to form a closed accommodating space 110. The metal shell 10 can constitute a radiator and a receiver of the antenna without needing to be slit, can realize no splicing gap, has stronger impact resistance and stability, is beneficial to realize waterproof and dustproof, and avoids the influence of external factors on the performance of the antenna. The shape of the metal shell 10 is not limited in the application, and can be set according to the product required by the actual application scene.

[0078] The plurality of flexible circuit boards 210, the plurality of printed circuit boards 220, and the antenna conductive structure 30 are arranged in the closed accommodating space 110, can break through the space limitation, match different shapes of the metal shell 10, and better adhere to the metal shell 10, thereby reducing the occupied space.

[0079] In some embodiments, the plurality of flexible circuit boards 210 are arranged on the inner wall of the metal shell 10.

[0080] In the embodiment, the plurality of flexible circuit boards 210 are arranged close to the inner wall of the metal shell 10, can greatly reduce the occupied space, make the metal shell 10 more miniaturized, and leave more space to increase other functional elements.

[0081] In some embodiments, the antenna conductive structure 30 is connected to the metal shell 10 through the insulating layer of the flexible circuit board 210.

[0082] In the embodiment, the antenna conductive structure 30 is a metal trace etched on the flexible circuit board 210. The insulating layer of the flexible circuit board 210 covers the antenna conductive structure 30. The insulating layer wraps the antenna conductive structure 30. By removing the insulating layer of the flexible circuit board 210 at the corresponding position of the antenna conductive structure 30, the antenna conductive structure 30 directly contacts the metal shell 10 through the insulating layer of the flexible circuit board 210, can also realize the connection between the antenna conductive structure 30 and the metal shell 10, realize the reception and emission of signals, make the metal shell 10 become a radiator and a receiver of the antenna, and realize the communication function.

[0083] Please refer to Figure 7 The application provides a smart ring, which comprises the antenna device in any one of the above embodiments. The metal shell 10 of the antenna device is at least part of the annular metal shell of the smart ring.

[0084] In this embodiment, the smart ring is small and portable, which can be conveniently worn on the body to realize real-time collection of physiological data and tracking of motion data and other functions. The metal shell 10 is a ring-shaped metal shell, which is used as the shell of the smart ring and is conducive to user wearing. The plurality of flexible circuit boards 210, the plurality of printed circuit boards 220 and the antenna conductive structure 30 can be arranged in the closed accommodation space 110 formed by the ring-shaped metal shell, so that the smart ring can interact with external devices through the antenna device to realize data transmission.

[0085] Through the soft and hard combined connection structure of the plurality of flexible circuit boards 210, the plurality of printed circuit boards 220 and the antenna conductive structure 30 in the antenna device, the antenna can be integrated and installed in the ring-shaped metal shell, which occupies a smaller space to realize the communication function of the antenna.

[0086] In some embodiments, the metal shell 10 can be provided with a key hole and the like. The key hole is used to realize information interaction with the user.

[0087] Please refer to Figure 8 and Figure 9 In some embodiments, the metal shell 10 of the antenna device is a ring-shaped metal shell of the smart ring. The ring-shaped metal shell includes two ring-shaped outer walls 101 and two ring-shaped side walls 102. The two ring-shaped outer walls 101 are arranged in a nested and opposite manner. The two ring-shaped side walls 102 are arranged on the two sides of the two ring-shaped outer walls 101 respectively. The two ring-shaped side walls 102 and the two ring-shaped outer walls 101 surround to form a closed accommodation space 110.

[0088] In this embodiment, the two ring-shaped outer walls 101 are arranged in a nested and opposite manner, which can be understood as the two ring-shaped outer walls 101 being arranged in a ring-in-ring manner in the concentric state, as shown in the structure of Figure 8 Further, the two ring-shaped side walls 102 are arranged on the two sides of the two ring-shaped outer walls 101 respectively, which can form a closed closed accommodation space 110 for accommodating the structural devices required by the smart ring, such as the plurality of flexible circuit boards 210, the plurality of printed circuit boards 220, the antenna conductive structure 30 and the battery 50.

[0089] The two ring-shaped outer walls 101 and the two ring-shaped side walls 102 are integrally formed to form the metal shell 10. The radius and width of the metal shell 10 can be adjusted according to the actual application scene to provide different accommodation spaces, so that the smart ring realizes different functions.

[0090] Please refer to Figure 10 and Figure 11In some embodiments, the plurality of printed circuit boards 220 and the plurality of flexible circuit boards 210 are arranged to form a ring-shaped circuit board 20. The antenna conductive structure 30 is arranged in the flexible circuit board 210 at one end of the ring-shaped circuit board 20. The ring-shaped circuit board 20 is arranged in the ring-shaped metal shell.

[0091] In this embodiment, the plurality of printed circuit boards 220 and the plurality of flexible circuit boards 210 are arranged to form a ring-shaped circuit board 20. The ring-shaped circuit board 20 is arranged in the ring-shaped metal shell, and can also be understood as being arranged in the closed accommodation space 110. The ring-shaped circuit board 20 can be folded and bent, which can match the ring-shaped metal shell of the smart ring, better fit the ring-shaped metal shell of the smart ring, reduce the occupied space, and improve the integration.

[0092] The antenna conductive structure 30 is arranged in the flexible circuit board 210 at one end of the ring-shaped circuit board 20, which can transmit the signal received by the ring-shaped metal shell from one end of the ring-shaped circuit board 20 to the printed circuit board 220. Similarly, the antenna conductive structure 30 is arranged in the flexible circuit board 210 at one end of the ring-shaped circuit board 20, which can transmit the signal on the printed circuit board 220 from one end of the ring-shaped circuit board 20 to the ring-shaped metal shell, so that the ring-shaped metal shell transmits the signal. By arranging the antenna conductive structure 30 in the flexible circuit board 210 at one end of the ring-shaped circuit board 20, the transmission path of the received signal and the transmitted signal can be shortened, the signal loss can be reduced, and the direction of the signal flow can be controlled.

[0093] Please refer to Figure 12 In some embodiments, the smart ring further comprises a battery 50. The battery 50 is arranged in the closed accommodation space 110 formed by the ring-shaped metal shell. The battery 50 is connected to the printed circuit board 220 at the other end of the ring-shaped circuit board 20. The flexible circuit board 210 provided with the antenna conductive structure 30 is at least partially overlapped with the battery 50.

[0094] In this embodiment, the battery 50 can provide the required power for the smart ring. The battery 50 is arranged in the closed accommodation space 110 formed by the ring-shaped metal shell, which can provide the required power for the electronic elements in the closed accommodation space 110, so that the smart ring can operate normally. By the plating process of the printed circuit board, the plurality of printed circuit boards 220 and the plurality of flexible circuit boards 210 are arranged to form a ring-shaped circuit board 20. The ring-shaped circuit board 20 has two opposite ends, the flexible circuit board 210 at one end is provided with the antenna conductive structure 30, and the printed circuit board 220 at the other end is connected to the battery 50. The battery 50 provides the required power for the ring-shaped circuit board 20 and each element arranged on the ring-shaped circuit board 20.

[0095] The flexible circuit board 210 provided with the antenna conductive structure 30 is arranged at least partially overlapped with the battery 50, so that the flexible circuit board 210 at both ends of the annular circuit board 20 is overlapped with the battery 50. The battery 50 supports the antenna conductive structure 30 provided in the flexible circuit board 210 at one end of the annular circuit board 20, so that a structural capacitance is formed between the antenna conductive structure 30 and the annular metal shell. Further, by arranging the flexible circuit board 210 provided with the antenna conductive structure 30 at least partially overlapped with the battery 50, the battery 50 can not only provide the required power for the smart ring, but also provide support for the flexible circuit board 210 at one end of the annular circuit board 20 and the antenna conductive structure 30, so that the structure of the annular circuit board 20 is more stable and reliable. Therefore, by arranging the flexible circuit board 210 provided with the antenna conductive structure 30 at least partially overlapped with the battery 50, the antenna support in the traditional device is removed, the occupied space is reduced, the cost is saved, and more space is provided for other devices of the smart ring.

[0096] In some embodiments, when the flexible circuit board 210 provided with the antenna conductive structure 30 is arranged at least partially overlapped with the battery 50, double-sided adhesive is arranged on the overlapped part of the flexible circuit board 210 and the battery 50, so that the support structure between the two is more stable.

[0097] In some embodiments, when the overlapped part of the flexible circuit board 210 provided with the antenna conductive structure 30 and the battery 50 is arranged with double-sided adhesive, the double-sided adhesive can be arranged on the battery 50 or the flexible circuit board 210, so that the flexible circuit board 210 can be pasted on the battery 50 or the inner wall of the annular metal shell.

[0098] In some embodiments, the smart ring further comprises a battery protection circuit. The battery protection circuit is arranged on the printed circuit board 220 away from the antenna conductive structure 30. The battery protection circuit is connected with the battery 50 and is used for protecting the battery 50.

[0099] In this embodiment, the battery protection circuit can prevent the battery 50 from being damaged due to abnormal conditions such as overcharging, overdischarging, overcurrent or short circuit, thereby protecting the safety of the battery 50, prolonging the service life of the battery 50, and ensuring the stable operation of the smart ring. The battery protection circuit includes one or more of a battery protection chip, a power switch tube, a resistor, a capacitor, and a diode.

[0100] The printed circuit board 220 has high hardness and is not easy to deform. By arranging the battery protection circuit on the printed circuit board 220, the battery protection chip, the power switch tube, the resistor, the capacitor, and the diode in the battery protection circuit are not easy to loosen after welding, so that the arrangement of the battery protection circuit is more stable and can effectively resist vibration and external force impact caused by external factors.

[0101] The battery protection circuit is arranged on the printed circuit board 220 away from the antenna conductive structure 30. Since the flexible circuit board 210 provided with the antenna conductive structure 30 is arranged at least partially overlapping the battery 50, the battery protection circuit can be understood as being arranged on the side away from the flexible circuit board 210 overlapping the battery 50, thereby avoiding the electromagnetic interference of the battery protection circuit on the antenna device and ensuring the stable and reliable operation of the antenna device.

[0102] In some embodiments, the annular circuit board 20 formed by the plurality of flexible circuit boards 210 and the plurality of printed circuit boards 220, the antenna conductive structure 30 and the battery 50 are placed in the closed accommodating space 110 of the annular metal shell (which can also be understood as the metal shell 10), and a glue filling process is performed to form a smart ring.

[0103] The filling material in the closed accommodating space 110 of the annular metal shell (which can also be understood as the metal shell 10) of the smart ring is epoxy resin filling glue. The epoxy resin filling glue has the advantages of electrical insulation and high mechanical strength, and can avoid the position of the annular circuit board 20 formed by the plurality of flexible circuit boards 210 and the plurality of printed circuit boards 220, the antenna conductive structure 30 and the battery 50 in the closed accommodating space 110 from changing, so that the performance of the antenna device is more stable, and the smart ring is more stable.

[0104] In some embodiments, the annular circuit board 20 is installed in the closed accommodating space 110 of the annular metal shell (which can also be understood as the metal shell 10) of the smart ring, so that the flexible circuit board 210 pasted on the battery 50 is tightly arranged on the inner wall of the annular metal shell (which can also be understood as the metal shell 10), thereby forming a structural capacitance between the antenna conductive structure 30 and the metal shell 10.

[0105] The higher the frequency value of the alternating current is, the smaller the reactance value of the structural capacitance is. The signal emitted by the antenna device can be coupled to the metal shell 10 through the structural capacitance formed between the antenna conductive structure 30 and the metal shell 10, and radiated to the outside through the metal shell 10. The metal shell 10 becomes part of the antenna device. The return loss of the antenna device is as shown in Figure 13 From the Figure 13 It can be seen that the return loss between 2.4GHz and 2.5GHz is less than -10dB, which can realize high-quality signal transmission.

[0106] The present application provides a wearable electronic device comprising the antenna device of any one of the above embodiments.

[0107] In the embodiment, the antenna device can be applied to various different types of wearable electronic devices. Through the antenna device, the wearable electronic device can be enabled to transmit and transfer signals with external devices, to realize data interaction, positioning navigation and other functions.

[0108] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the above described functions. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the application. The specific working process of the units and modules in the system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0109] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the relevant description of other embodiments.

[0110] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the application.

[0111] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An antenna device, characterized by The antenna device is arranged in a smart ring, the smart ring comprises a battery (50), and the antenna device comprises: A metal shell (10) constitutes a radiator and a receiving body of an antenna, the metal shell (10) comprises two annular outer walls (101) and two annular side walls (102) which are integrally formed, the two annular outer walls (101) are arranged opposite to each other, and the two annular side walls (102) are arranged on two sides of the two annular outer walls (101) respectively; A plurality of flexible circuit boards (210) and a plurality of printed circuit boards (220) which are connected to each other are arranged in the metal shell (10); The plurality of printed circuit boards (220) and the plurality of flexible circuit boards (210) are arranged at intervals to form an annular circuit board (20); An antenna conductive structure (30) is arranged in the flexible circuit board (210) at one end of the annular circuit board (20), and the antenna conductive structure (30) is connected with the adjacent printed circuit board (220); the antenna conductive structure (30) is connected with the metal shell (10) through an insulating layer of the flexible circuit board (210); The printed circuit board (220) is provided with an antenna matching circuit, the antenna matching circuit is connected with an antenna feed point (310) and a ground feed point (320) of the antenna conductive structure (30) through a buried hole process or a via hole process, and is used for adjusting an antenna resonance point; The printed circuit board (220) at the other end of the annular circuit board (20) is connected with the battery (50) arranged in the metal shell (10); The flexible circuit board (210) provided with the antenna conductive structure (30) is arranged at least partially overlapped with the battery (50).

2. The antenna device of claim 1, wherein, The flexible circuit board (210) is arranged between two adjacent printed circuit boards (220); The length of the flexible circuit board (210) provided with the antenna conductive structure (30) is greater than the length of the flexible circuit board (210) without the antenna conductive structure (30).

3. The antenna device of claim 1, wherein, An inner wall of the metal shell (10) surrounds to form a closed containing space (110); The plurality of flexible circuit boards (210), the plurality of printed circuit boards (220) and the antenna conductive structure (30) are arranged in the closed containing space (110).

4. A smart ring, characterized by The antenna device comprises the metal shell (10) of the smart ring.

5. The smart ring of claim 4, wherein, The smart ring further comprises a battery protection circuit; The battery protection circuit is arranged on the printed circuit board (220) away from the antenna conductive structure (30), the battery protection circuit is connected with the battery (50), and is used for protecting the battery (50).

6. A wearable electronic device, comprising: The antenna device comprises the metal shell (10) of the smart ring.

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