Antenna device, intelligent ring and wearable electronic equipment

Abstract

The invention provides an antenna device, an intelligent ring and wearable electronic equipment, and belongs to the technical field of wearable equipment. The plurality of printed circuit boards and the plurality of flexible circuit boards are arranged at intervals and are connected with each other, so that the metal shells with different shapes can be matched, and the occupied space is reduced. The antenna conductive structure arranged in the flexible circuit board and the metal shell are relatively independently arranged, so that structural capacitance is formed between the antenna conductive structure and the metal shell, coupling connection between the antenna conductive structure and the metal shell is achieved, and the occupied space is small. 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. The metal shell serves as a receiving body of the antenna to receive external signals, and the external signals are coupled to the antenna conductive structure and transmitted to the printed circuit boards through the flexible circuit boards. Through the device, a communication function can be realized, the occupied space is small, and the problem of large occupied space of a traditional antenna structure is solved.

Description

Technical Field

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

[0002] Wearable electronic devices are portable electronic devices worn directly on the body or integrated into clothing or accessories. Examples include smart rings, smart watches, smart bracelets, smart headphones, augmented reality headsets, and virtual reality headsets. With the advancement of science and technology, wearable electronic devices are becoming increasingly popular among users due to their portability, dexterity, novelty, real-time capabilities, and interactivity.

[0003] Antennas in wearable electronic devices are core components for wireless communication, determining the device's communication quality and user experience. However, antenna structures in traditional devices occupy a large amount of space, limiting the size and shape of wearable electronic devices. Summary of the Invention

[0004] The purpose of this application is to provide an antenna device, a smart ring and a wearable electronic device, aiming to solve the problem that the antenna structure in traditional devices occupies a large space.

[0005] The present application provides an antenna device, comprising: The metal shell constitutes the radiator and receiver of the antenna; a plurality of flexible circuit boards and a plurality of printed circuit boards connected to each other and disposed in the metal housing; The plurality of printed circuit boards and the plurality of flexible circuit boards are arranged at intervals; The antenna conductive structure is arranged in the flexible circuit board, and the antenna conductive structure is connected to the adjacent printed circuit board. The antenna conductive structure and the metal shell are relatively independent.

[0006] In some embodiments, the printed circuit board is provided with an antenna matching circuit, and the antenna matching circuit is connected to the antenna conductive structure for adjusting the antenna resonance point.

[0007] In one embodiment, the antenna feeding point and the ground feeding point provided in the antenna conductive structure are respectively connected to the antenna matching circuit through a buried hole process or a through-hole process.

[0008] In some embodiments, the flexible circuit board is disposed between two adjacent printed circuit boards; The length of the flexible circuit board provided with the antenna conductive structure is greater than the length of the flexible circuit board not provided with the antenna conductive structure.

[0009] In some embodiments, the metal shell is integrally formed, and the inner wall of the metal shell surrounds and forms a closed accommodation space; The plurality of flexible circuit boards, the plurality of printed circuit boards and the antenna conductive structure are arranged in the closed accommodation space.

[0010] In some embodiments, the antenna conductive structure is connected to the metal housing through the insulating layer of the flexible circuit board.

[0011] The present application provides a smart ring, comprising the antenna device described in any one of the above embodiments, wherein the metal shell of the antenna device is at least a portion of the annular metal shell of the smart ring.

[0012] In some embodiments, the antenna device has a plurality of printed circuit boards and a plurality of flexible circuit boards spaced apart to form a ring-shaped circuit board; An antenna conductive structure is provided in the flexible circuit board at one end of the annular circuit board, and the annular circuit board is provided in the annular metal shell.

[0013] In some embodiments, the smart ring further includes: a battery disposed in the closed accommodation space formed by the annular metal shell, the battery being connected to the printed circuit board at the other end of the annular circuit board; The flexible circuit board provided with the antenna conductive structure is at least partially overlapped with the battery.

[0014] In some embodiments, the smart ring further includes a battery protection circuit; 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 and is used to protect the battery.

[0015] The present application provides a wearable electronic device, comprising the antenna device described in any one of the above embodiments.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: Multiple printed circuit boards and multiple flexible circuit boards are spaced apart and connected to each other to form a rigid-soft circuit board. The multiple flexible circuit boards are flexible and can break through spatial limitations with their inherent flexibility and bendability, enabling structural deformation. By connecting multiple flexible circuit boards, the multiple printed circuit boards can bend and deform when the multiple flexible circuit boards are bent, thus matching metal housings of different shapes. This allows the multiple flexible circuit boards and multiple printed circuit boards to better fit the metal housing, reducing space usage.

[0017] The antenna conductive structure is arranged in the flexible circuit board and connected to the printed circuit board, realizing the connection between the antenna conductive structure, the flexible circuit board and the printed circuit board, and enabling signal transmission between each other without relying on external auxiliary hardware structure to achieve connection, thereby improving the reliability of the connection.

[0018] The antenna conductive structure within the flexible printed circuit board is relatively independent of the metal housing, forming a structural capacitor between the two, with air or an insulating layer as the dielectric medium. This independent arrangement allows the antenna conductive structure to serve as one electrode of the structural capacitor, while the metal housing serves as the other electrode, enabling a coupling connection between the two and reducing space usage.

[0019] Furthermore, the structural capacitance formed between the antenna conductive structure and the metal shell can achieve a coupling connection between the antenna conductive structure and the metal shell. Signals on multiple printed circuit boards can be coupled to the metal shell through multiple flexible circuit boards and the antenna conductive structure, so that the metal shell acts as the radiator of the antenna to transmit signals outward to achieve a communication function. At the same time, the metal shell acts as the receiver of the antenna to receive external signals, couple them to the antenna conductive structure, and transmit them to multiple printed circuit boards through the antenna conductive structure and multiple flexible circuit boards. Therefore, the antenna device provided by the present application can realize the communication function without adopting the structure in which the antenna in traditional equipment needs to be connected to the shell slot with hardware such as a pin or a metal spring, thereby solving the problem of the antenna structure occupying a large space in traditional equipment.

[0020] Furthermore, the antenna conductive structure and the metal shell are relatively independently arranged, and the relative position is stable and not easily affected by external factors. This makes the coupling connection between the antenna conductive structure and the metal shell more stable and reliable, ensuring the communication quality of the antenna and reducing the influence of external factors.

[0021] By independently arranging the antenna conductive structure and the metal housing to achieve a coupling connection, there is no need to cut grooves or pre-set gaps in the metal housing, thus ensuring the integrity of the metal housing. The antenna device provided in this application not only meets communication functions while maintaining the integrity of the metal housing, but also solves the problem of large space occupied by the antenna and its connection structure in traditional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of the antenna device in some embodiments provided in this application.

[0024] Figure 2 This is a schematic diagram of the connection structure of multiple flexible circuit boards, multiple printed circuit boards, and antenna conductive structures in some embodiments provided in this application.

[0025] Figure 3 Schematic diagram of the connection structure of multiple flexible circuit boards, multiple printed circuit boards and antenna conductive structures in some other embodiments provided by the present application.

[0026] Figure 4 This is a schematic diagram of the position structure of the metal shell and the antenna conductive structure in some embodiments provided in this application.

[0027] Figure 5 This is a schematic diagram of the capacitance formed by the metal shell and the antenna conductive structure in some embodiments provided in this application.

[0028] Figure 6 This is a schematic structural diagram of the closed accommodation space of the metal shell in some embodiments provided in this application.

[0029] Figure 7 This is a schematic diagram of the overall structure of the metal shell of the smart ring in some embodiments provided in this application.

[0030] Figure 8 This is a main view of the smart ring in some embodiments provided in this application.

[0031] Figure 9 This is a side view of a smart ring in some embodiments provided in this application.

[0032] Figure 10 Schematic diagram of the connection structure of multiple flexible circuit boards, multiple printed circuit boards, antenna conductive structures and batteries in some embodiments provided in this application.

[0033] Figure 11 This is a schematic structural diagram of a ring circuit board in some embodiments provided in this application.

[0034] Figure 12 This is a schematic diagram of the overall internal structure of the smart ring in some embodiments provided in this application.

[0035] Figure 13 This is a diagram of the antenna return loss of the antenna device in some embodiments provided in this application. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is 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 this application and are not intended to limit this application.

[0037] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0039] In addition, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In addition, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit differences.

[0040] In this application, unless otherwise specified, " / " indicates an "or" relationship between the associated objects. For example, A / B can mean either A or B. "And / or" in this application simply describes an association between associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, in this application, unless otherwise specified, "multiple" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of a, b, or c" can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0041] See Figure 1 The present application provides an antenna device. The antenna device includes a metal housing 10, multiple flexible circuit boards 210, multiple printed circuit boards 220, and an antenna conductive structure 30. The metal housing 10 constitutes the radiator and receiver of the antenna. Multiple flexible circuit boards 210 and multiple printed circuit boards 220 are interconnected and disposed within the metal housing 10.

[0042] See Figure 2 and Figure 3 The plurality of printed circuit boards 220 are spaced apart from the plurality of flexible circuit boards 210. The antenna conductive structure 30 is disposed within the flexible circuit board 210. The antenna conductive structure 30 is connected to adjacent printed circuit boards 220. The antenna conductive structure 30 is disposed relatively independently from the metal housing 10.

[0043] In this embodiment, multiple flexible printed circuit boards (FPCs) 210, multiple printed circuit boards (PCBs) 220, and the antenna conductive structure 30 are all disposed within the metal housing 10. The multiple PCBs 220 are spaced apart and connected to the multiple flexible circuit boards 210, forming a rigid-flexible circuit board. The multiple flexible circuit boards 210 are flexible, enabling them to overcome spatial limitations and achieve structural deformation through their inherent flexibility and bendability. By connecting the multiple flexible circuit boards 210, the multiple PCBs 220 can bend and deform as the multiple flexible circuit boards 210 bend, thereby adapting to the various shapes of the metal housing 10. This allows the multiple flexible circuit boards 210 and the multiple PCBs 220 to better fit the metal housing 10, reducing space usage.

[0044] The antenna conductive structure 30 is arranged in the flexible circuit board 210 and is connected to the adjacent printed circuit board 220, realizing the connection between the antenna conductive structure 30, the flexible circuit board 210 and the printed circuit board 220, and enabling the transmission of signals between each other without relying on external auxiliary hardware structures to achieve connection, thereby improving the reliability of the connection.

[0045] The antenna conductive structure 30 provided in the flexible circuit board 210 is relatively independent from the metal shell 10, so that a structural capacitor with air or an insulating layer as a medium is formed between the antenna conductive structure 30 and the metal shell 10, such as Figure 4 and Figure 5As shown. The structural capacitance C formed by the relatively independent arrangement of the antenna conductive structure 30 and the metal shell 10 is C=ε*S / (4πkD). Among them, ε represents the dielectric constant of the medium between the antenna conductive structure 30 and the metal shell 10, S represents the area of the antenna conductive structure 30 and the metal shell 10 facing each other, and D represents the distance between the antenna conductive structure 30 and the metal shell 10. It can be seen from this that by relatively independently arranging the antenna conductive structure 30 and the metal shell 10, the antenna conductive structure 30 serves as one electrode of the structural capacitance, and the metal shell 10 serves as the other electrode of the structural capacitance, a coupling connection between the two can be achieved, thereby reducing the occupied space.

[0046] Furthermore, the structural capacitance formed between the antenna conductive structure 30 and the metal shell 10 enables the antenna conductive structure 30 to be coupled to the metal shell 10. Signals on multiple printed circuit boards 220 can be coupled to the metal shell 10 through multiple flexible circuit boards 210 and the antenna conductive structure 30, so that the metal shell 10 acts as the radiator of the antenna to transmit signals outward to achieve communication functions. At the same time, the metal shell 10 acts as the receiver of the antenna to receive external signals, couple them to the antenna conductive structure 30, and transmit them to the multiple printed circuit boards 220 through the antenna conductive structure 30 and the multiple flexible circuit boards 210. Therefore, the antenna device provided by the present application can realize communication functions without adopting the structure in which the antenna in traditional equipment needs to be connected to the shell slot with hardware such as a pin or a metal spring, thereby solving the problem of the antenna structure occupying a large space in traditional equipment.

[0047] Furthermore, the antenna conductive structure 30 and the metal shell 10 are relatively independently arranged, and their relative position is stable and not easily affected by external factors. This makes the coupling connection between the antenna conductive structure 30 and the metal shell 10 more stable and reliable, ensuring the communication quality of the antenna and reducing the influence of external factors.

[0048] Furthermore, by independently providing the antenna conductive structure 30 and the metal housing 10 to achieve a coupled connection, there is no need to cut grooves or pre-set gaps in the metal housing 10, thereby ensuring the integrity of the metal housing 10. The antenna device provided in this application not only meets communication functions while maintaining the integrity of the metal housing 10, but also solves the problem of the antenna and its connection structure occupying a large space in conventional devices.

[0049] In some embodiments, the antenna conductive structure 30 is a metal trace etched on the flexible circuit board 210 and can be made of metal such as copper, aluminum, or gold.

[0050] In some embodiments, the printed circuit board 220 is provided with an antenna matching circuit, which is connected to the antenna conductive structure 30 for adjusting the antenna resonance point.

[0051] In this embodiment, the antenna conductive structure 30 and the metal housing 10 are relatively independent, forming a structural capacitance between the antenna conductive structure 30 and the metal housing 10 with air or an insulating layer as the dielectric medium. The structural capacitance formed by the independent arrangement of the antenna conductive structure 30 and the metal housing 10 is C = ε * S / (4πkD). The capacitance parameters formed by the antenna conductive structure 30 and the metal housing 10 can be adjusted by using the dielectric constant ε, the area S facing the metal housing 10, and the distance D between the antenna conductive structure 30 and the metal housing 10.

[0052] The antenna matching circuit is connected to the antenna conductive structure 30, which can be understood as the antenna matching circuit being connected to an electrode of the structural capacitor. The antenna matching circuit includes one or more components such as resistors, capacitors, and inductors. Different combinations of resistors, capacitors, and inductors can achieve switching between different frequency bands. Furthermore, by connecting the antenna conductive structure 30 to the antenna matching circuit, the antenna matching circuit and the structural capacitor formed by the antenna conductive structure 30 and the antenna matching circuit can be coordinated and adjusted with each other to adjust the resonance point of the antenna device, meet the frequency requirements and efficiency requirements of different frequency bands, achieve wireless communication within the target frequency band, and improve the quality of wireless communication.

[0053] Furthermore, the printed circuit board 220 is highly rigid and resistant to deformation. By placing the antenna matching circuit on the printed circuit board 220, components such as resistors, capacitors, and inductors in the antenna matching circuit are less likely to become loose due to external forces after soldering. This makes the antenna matching circuit more stable and effectively resists vibration and external impacts caused by external factors.

[0054] In some embodiments, the antenna matching circuit includes a switching chip and multiple frequency band circuits. The antenna matching circuit can be installed on the same printed circuit board 220 or on different printed circuit boards 220, and can be adjusted according to the actual application scenario. By switching different antenna switches using the switching chip in the antenna matching circuit, different frequency band circuits can be selected to achieve transmission and reception of signals in different frequency bands.

[0055] In some embodiments, the operating frequency band of the antenna device can be the Bluetooth band of 2.4GHz to 2.5GHz, the ultra-high frequency band of 860MHz to 960MHz, the near-field communication band of 13.56MHz, etc., which can be adjusted according to the actual application scenario.

[0056] In some embodiments, multiple printed circuit boards 220 and multiple flexible circuit boards 210 may also be provided with components that can realize various functions required by wearable electronic devices (for example: smart rings, smart watches, smart bracelets, smart headphones, augmented reality head-mounted devices, and virtual reality head-mounted devices, etc.).

[0057] In some embodiments, the antenna feed point 310 and the ground feed point 320 provided in the antenna conductive structure 30 are respectively connected to the antenna matching circuit through a buried hole process or a through-hole process, such as Figure 2 and Figure 3 shown.

[0058] In this embodiment, the antenna feed point 310 can be understood as a signal input point or output point. The ground feed point 320 can be understood as providing a reference low potential, cooperating with the antenna feed point 310 to ensure that the antenna device can operate normally.

[0059] The antenna conductive structure 30 is coupled to the metal housing 10, enabling signal transmission and reception through the metal housing 10. Furthermore, an antenna feed point 310 is provided on the antenna conductive structure 30 to transmit signals received by the metal housing 10 to the antenna matching circuit provided on the printed circuit board 220, thereby enabling reception of signals of different frequency bands. The provision of the antenna feed point 310 on the antenna conductive structure 30 also allows signals of different frequency bands selected by the antenna matching circuit provided on the printed circuit board 220 to be transmitted to the metal housing 10 via the antenna feed point 310, enabling the metal housing 10 to transmit signals of different frequency bands.

[0060] The antenna conductive structure 30 is connected to the antenna matching circuit provided on the printed circuit board 220 through a buried hole process or a through-hole process, which can realize the communication function and eliminate the spring or ejector pin connection structure between the antenna feeding point and the mainboard in traditional devices, thereby saving space and cost, improving space utilization, and not limiting the size and shape of wearable electronic devices.

[0061] Furthermore, the antenna feed point 310 and ground feed point 320 provided on the antenna conductive structure 30 are connected to the antenna matching circuit via a buried or through-hole process, which reduces signal transmission losses, ensures the integrity of the transmitted signal, and improves the communication quality of the antenna device. Furthermore, the buried or through-hole connection prevents breakage caused by external vibration and impact, and is more stable and reliable than traditional hardware connection methods such as ejector pins or metal shrapnel.

[0062] In some embodiments, a flexible circuit board 210 is disposed 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 not provided with the antenna conductive structure 30.

[0063] In this embodiment, a flexible circuit board 210 is disposed between two adjacent printed circuit boards 220, thereby forming a circuit board structure with alternating hard and soft components between the multiple printed circuit boards 220 and the multiple flexible circuit boards 210. Connecting two adjacent printed circuit boards 220 via a flexible circuit board 210 can solve the problem of deformation between the two adjacent printed circuit boards 220. Thus, by disposing a flexible circuit board 210 between two adjacent printed circuit boards 220, the circuit board structure with alternating hard and soft components between the multiple printed circuit boards 220 and the multiple flexible circuit boards 210 can better match the different shapes of the metal housing 10, ensuring better adhesion to the metal housing 10 and reducing space occupation.

[0064] The length of the flexible circuit board 210 provided with the antenna conductive structure 30 is greater than that of the flexible circuit board 210 without the antenna conductive structure 30. This ensures that when etching the antenna conductive structure 30 on the flexible circuit board 210, there is sufficient space to form the antenna conductive structure 30, which facilitates forming the required structural capacitance with the metal housing 10. Furthermore, the length of the flexible circuit board 210 without the antenna conductive structure 30 can be reduced, which helps ensure a flexible connection between two adjacent printed circuit boards 220 while minimizing space and saving costs.

[0065] See Figure 6 In some embodiments, the metal housing 10 is integrally formed. The inner wall of the metal housing 10 surrounds and forms a closed receiving space 110. A plurality of flexible circuit boards 210, a plurality of printed circuit boards 220, and the antenna conductive structure 30 are disposed in the closed receiving space 110.

[0066] In this embodiment, the metal housing 10 is integrally formed to form a closed housing space 110. The metal housing 10 forms the antenna's radiator and receiver without requiring any seams, achieving seamless joints. This provides enhanced impact resistance and stability, facilitates waterproofing and dustproofing, and prevents external factors from affecting antenna performance. The shape of the metal housing 10 is not limited in this application and can be configured to meet the product requirements of the actual application scenario.

[0067] Multiple flexible circuit boards 210, multiple printed circuit boards 220 and antenna conductive structures 30 are arranged in the closed accommodation space 110, which can break through space limitations, match metal shells 10 of different shapes, fit better with the metal shell 10, and reduce occupied space.

[0068] In some embodiments, a plurality of flexible circuit boards 210 are disposed on the inner wall of the metal housing 10 .

[0069] In this embodiment, the multiple flexible circuit boards 210 are arranged close to the inner wall of the metal shell 10, which can greatly reduce the occupied space, making the metal shell 10 more miniaturized and leaving more space for adding other functional components.

[0070] In some embodiments, the antenna conductive structure 30 passes through the insulating layer of the flexible printed circuit board 210 and is connected to the metal housing 10 .

[0071] In this 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 encapsulates the antenna conductive structure 30. By removing the insulating layer from the flexible circuit board 210 at the corresponding portion of the antenna conductive structure 30, the antenna conductive structure 30 passes through the insulating layer of the flexible circuit board 210 and directly contacts the metal housing 10. This connection between the antenna conductive structure 30 and the metal housing 10 is also achieved, enabling signal reception and transmission, making the metal housing 10 the antenna's radiator and receiver, thus achieving communication functionality.

[0072] See Figure 7 The present application provides a smart ring, comprising the antenna device described in any one of the above embodiments. The metal shell 10 of the antenna device is at least a portion of the annular metal shell of the smart ring.

[0073] In this embodiment, the smart ring is compact and portable, making it easy to wear and capable of real-time physiological data collection and motion data tracking. The metal housing 10 is an annular metal housing that serves as the housing for the smart ring, making it easier for the user to wear it. Multiple flexible circuit boards 210, multiple printed circuit boards 220, and an antenna conductive structure 30 can be disposed within the enclosed housing 110 formed by the annular metal housing. This allows the smart ring to communicate with external devices via the antenna assembly, enabling data transmission.

[0074] Through the soft-hard connection structure of multiple flexible circuit boards 210, multiple printed circuit boards 220 and antenna conductive structure 30 in the antenna device, the antenna can be integrated and installed in the annular metal shell, occupying a smaller space to realize the communication function of the antenna.

[0075] In some embodiments, the metal housing 10 may be provided with a button hole, etc. Information interaction with the user is achieved through the button hole.

[0076] See Figure 8 and Figure 9In some embodiments, the metal housing 10 of the antenna device is an annular metal housing of a smart ring. The annular metal housing includes two annular outer walls 101 and two annular side walls 102. The two annular outer walls 101 are nested and arranged opposite each other. The two annular side walls 102 are respectively arranged on either side of the two annular outer walls 101. The two annular side walls 102 and the two annular outer walls 101 enclose a closed receiving space 110.

[0077] In this embodiment, the two annular outer walls 101 are nested and arranged opposite to each other, which can be understood as the two annular outer walls 101 being arranged in a ring within a ring. When the two annular outer walls 101 are concentric, they are arranged opposite to each other, such as Figure 8 Furthermore, two annular side walls 102 are respectively provided on both sides of the two annular outer walls 101 to form a closed accommodation space 110 for accommodating the structural components required for the smart ring, such as multiple flexible circuit boards 210, multiple printed circuit boards 220, antenna conductive structures 30, and batteries 50.

[0078] The two annular outer walls 101 and the two annular side walls 102 are integrally formed to form a metal shell 10. The radius and width of the metal shell 10 can be adjusted according to the actual application scenario to provide different accommodation spaces so that the smart ring can achieve different functions.

[0079] See Figure 10 and Figure 11 In some embodiments, multiple printed circuit boards 220 and multiple flexible circuit boards 210 of the antenna device are spaced apart to form a ring-shaped circuit board 20. An antenna conductive structure 30 is disposed within the flexible circuit board 210 at one end of the ring-shaped circuit board 20. The ring-shaped circuit board 20 is disposed within a ring-shaped metal housing.

[0080] In this embodiment, a ring-shaped circuit board 20 is formed by spacing multiple printed circuit boards 220 and multiple flexible circuit boards 210. The ring-shaped circuit board 20 is disposed within an annular metal housing, which can also be understood as being disposed within the closed receiving space 110. The ring-shaped circuit board 20 is foldable and bendable, allowing it to fit better with the annular metal housing of the smart ring, thereby reducing space usage and improving integration.

[0081] The antenna conductive structure 30 is disposed within the flexible circuit board 210 at one end of the annular circuit board 20, allowing signals received by the annular metal housing to be transmitted from that end of the annular circuit board 20 to the printed circuit board 220. Similarly, the antenna conductive structure 30 is disposed within the flexible circuit board 210 at one end of the annular circuit board 20, allowing signals on the printed circuit board 220 to be transmitted from that end of the annular circuit board 20 to the annular metal housing, allowing the annular metal housing to transmit the signal. By disposing the antenna conductive structure 30 within the flexible circuit board 210 at one end of the annular circuit board 20, the transmission paths of the received and transmitted signals can be shortened, reducing signal loss and facilitating control of the direction of signal flow.

[0082] See Figure 12 In some embodiments, the smart ring further includes a battery 50. The battery 50 is disposed within the enclosed housing 110 formed by the annular metal housing. The battery 50 is connected to the printed circuit board 220 at the other end of the annular circuit board 20. The flexible circuit board 210, on which the antenna conductive structure 30 is disposed, at least partially overlaps the battery 50.

[0083] In this embodiment, the battery 50 can provide the required electrical energy for the smart ring. The battery 50 is disposed within the closed housing space 110 formed by the annular metal shell, and can provide the required electrical energy for the electronic components within the closed housing space 110, thereby enabling the normal operation of the smart ring. Through the platemaking process of the printed circuit board, multiple printed circuit boards 220 and multiple flexible circuit boards 210 are spaced apart to form an annular circuit board 20. The annular circuit board 20 has two oppositely disposed ends. The flexible circuit board 210 at one end is provided with an 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 electrical energy for the annular circuit board 20 and the various components arranged on the annular circuit board 20.

[0084] The flexible circuit board 210, equipped with the antenna conductive structure 30, is at least partially overlapped with the battery 50, resulting in overlapping connection between the flexible circuit board 210 and the battery 50 at both ends of the ring-shaped circuit board 20. The battery 50 supports the antenna conductive structure 30 located within the flexible circuit board 210 at one end of the ring-shaped circuit board 20, creating a structural capacitor between the antenna conductive structure 30 and the annular metal shell. Furthermore, by at least partially overlapping the flexible circuit board 210, equipped with the antenna conductive structure 30, and the battery 50, the battery 50 not only provides the required power for the smart ring but also provides support for the flexible circuit board 210 and the antenna conductive structure 30 at one end of the ring-shaped circuit board 20, making the ring-shaped circuit board 20 more stable and reliable. Consequently, by at least partially overlapping the flexible circuit board 210, equipped with the antenna conductive structure 30, and the battery 50, the antenna bracket commonly found in conventional devices is eliminated, reducing space and costs, and providing more space for other components of the smart ring.

[0085] In some embodiments, when the flexible circuit board 210 with the antenna conductive structure 30 is at least partially overlapped with the battery 50 , double-sided tape is provided on the overlapping portion of the flexible circuit board 210 and the battery 50 to make the support structure therebetween more stable.

[0086] In some embodiments, when double-sided tape is provided on the overlapping portion of the flexible circuit board 210 provided with the antenna conductive structure 30 and the battery 50, the double-sided tape can be provided on either the battery 50 or the flexible circuit board 210, so that the flexible circuit board 210 can be adhered to the battery 50 or the inner wall of the annular metal shell.

[0087] In some embodiments, the smart ring further includes a battery protection circuit. The battery protection circuit is disposed on the printed circuit board 220 away from the antenna conductive structure 30. The battery protection circuit is connected to the battery 50 for protecting the battery 50.

[0088] In this embodiment, the battery protection circuit can prevent the battery 50 from being damaged by abnormal conditions such as overcharging, over-discharging, overcurrent, or short circuit, thereby ensuring the safety of the battery 50, extending the service life of the battery 50, and ensuring the stable operation of the smart ring. The battery protection circuit includes one or more components such as a battery protection chip, a power switch tube, a resistor, a capacitor, and a diode.

[0089] The printed circuit board 220 is highly rigid and resistant to deformation. By placing the battery protection circuit on the printed circuit board 220, components such as the battery protection chip, power switch, resistor, capacitor, and diode within the battery protection circuit are less likely to become loose due to external forces after soldering. This makes the battery protection circuit more stable and effectively resists vibration and external shocks caused by external factors.

[0090] The battery protection circuit is located on the printed circuit board 220, away from the antenna conductive structure 30. Since the flexible printed circuit board 210, on which the antenna conductive structure 30 is located, at least partially overlaps the battery 50, the battery protection circuit can be understood as being located away from the overlapping side of the flexible printed circuit board 210 and the battery 50. This prevents electromagnetic interference from the battery protection circuit on the antenna assembly, ensuring stable and reliable operation of the antenna assembly.

[0091] In some embodiments, the annular circuit board 20 formed by multiple flexible circuit boards 210 and multiple printed circuit boards 220, the antenna conductive structure 30 and the battery 50 are placed in the closed accommodation space 110 of the annular metal shell (which can also be understood as the metal shell 10), and glue is poured to form a smart ring.

[0092] The closed housing space 110 of the smart ring's annular metal housing (also referred to as the metal housing 10) is filled with epoxy resin potting compound. Epoxy resin potting compound offers advantages such as electrical insulation and high mechanical strength. This prevents the positions of the annular circuit board 20, formed by multiple flexible circuit boards 210 and multiple printed circuit boards 220, the antenna conductive structure 30, and the battery 50 from shifting within the closed housing space 110, thereby ensuring more stable performance of the antenna assembly and enhancing the stability of the smart ring.

[0093] In some embodiments, the annular circuit board 20 is installed in the closed accommodation 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 attached to the battery 50 is tightly attached to the inner wall of the annular metal shell (which can also be understood as the metal shell 10), thereby forming a structural capacitor between the antenna conductive structure 30 and the metal shell 10.

[0094] The higher the frequency of the alternating current, the smaller the reactance of the structural capacitance. The signal transmitted 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 a part of the antenna device. The return loss of the antenna device is as follows: Figure 13 As shown. Figure 13 It can be seen that the return loss between 2.4GHz and 2.5GHz is less than -10dB, which can achieve high-quality signal transmission.

[0095] The present application provides a wearable electronic device, comprising the antenna device of any one of the above embodiments.

[0096] In this embodiment, the antenna device can be applied to various types of wearable electronic devices. Through the antenna device, the wearable electronic device can send and transmit signals with external devices, realizing multiple functions such as data exchange and positioning navigation.

[0097] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0098] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0099] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0100] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. 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. 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 various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. An antenna device, characterized in that: include: A metal shell (10) constituting the radiator and receiver of the antenna; a plurality of flexible circuit boards (210) and a plurality of printed circuit boards (220) connected to each other and disposed in the metal housing (10); The plurality of printed circuit boards (220) and the plurality of flexible circuit boards (210) are arranged at intervals; The antenna conductive structure (30) is arranged in the flexible circuit board (210), and the antenna conductive structure (30) is connected to the adjacent printed circuit board (220). The antenna conductive structure (30) and the metal shell (10) are arranged relatively independently.

2. The antenna device according to claim 1, wherein The printed circuit board (220) is provided with an antenna matching circuit, which is connected to the antenna conductive structure (30) and is used to adjust the antenna resonance point.

3. The antenna device according to claim 2, wherein The antenna feeding point (310) and the ground feeding point (320) provided on the antenna conductive structure (30) are respectively connected to the antenna matching circuit through a buried hole process or a through-hole process.

4. The antenna device according to 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) not provided with the antenna conductive structure (30).

5. The antenna device according to claim 1, wherein The metal shell (10) is integrally formed, and the inner wall of the metal shell (10) surrounds and forms 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).

6. The antenna device according to claim 1, wherein The antenna conductive structure (30) passes through the insulating layer of the flexible circuit board (210) and is connected to the metal shell (10).

7. A smart ring, characterized in that: The antenna device comprises the antenna device according to any one of claims 1 to 6, wherein the metal shell (10) of the antenna device is at least a portion of the annular metal shell of the smart ring.

8. The smart ring according to claim 7, wherein: The plurality of printed circuit boards (220) of the antenna device and the plurality of flexible circuit boards (210) are spaced apart to form a ring-shaped circuit board (20); An antenna conductive structure (30) is provided in the flexible circuit board (210) at one end of the annular circuit board (20), and the annular circuit board (20) is provided in the annular metal shell.

9. The smart ring according to claim 8, wherein: The smart ring also includes: A battery (50) is disposed in a closed accommodation space (110) formed by the annular metal shell, and the battery (50) is connected to the printed circuit board (220) at the other end of the annular circuit board (20); The flexible circuit board (210) provided with the antenna conductive structure (30) and the battery (50) are at least partially overlapped.

10. The smart ring according to claim 9, wherein: The smart ring also includes a battery protection circuit; The battery protection circuit is arranged on the printed circuit board (220) away from the antenna conductive structure (30), and the battery protection circuit is connected to the battery (50) for protecting the battery (50).

11. A wearable electronic device, characterized in that: The antenna device comprises the antenna device according to any one of claims 1 to 6.

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