A smart watch with an external antenna

Abstract

The utility model discloses a kind of smart watches with external antenna, it relates to smart watch field, it includes watch dial main body, signal processing module is equipped in the watch dial main body, the both sides of watch dial main body are connected with the watchband of flexible structure, antenna is equipped on the watchband, the antenna is electrically connected with signal processing module, and the antenna is formed closed loop along the length direction of watchband With zigzag path of turning back;The smart watch with external antenna provided by the utility model is formed closed loop with zigzag path of turning back in the length direction of watchband, reduces signal loss, enhances communication quality, and can effectively utilize the plane area of watchband, increases antenna effective length, extends conductive path, improves resonance efficiency and multi-band compatibility, reduces the interference sensitivity to electric field, response to magnetic field is more stable, can adapt to the environmental change under skin.

Description

Technical Field

[0001] This utility model relates to the field of smartwatch technology, and in particular to a smartwatch with an external antenna. Background Technology

[0002] With the increasing prevalence of smart technology, it is becoming ubiquitous in people's lives. Smart wearable products have been incredibly popular in recent years, with smartwatches and fitness trackers coming in a wide variety of styles. They serve not only as fitness devices but also as accessories. As the functions of wearable watches continue to expand, such as receiving network signals and Bluetooth connectivity, the requirements for signal strength are increasing. However, the internal space of a watch is limited, and the signal reception capability of its built-in antenna is also restricted. Furthermore, the built-in antenna occupies internal space, which may limit the size or functionality of other components.

[0003] Chinese patent application CN201911289600.3 discloses a smartwatch with an external antenna, comprising a watch body, a first watch band, and a second watch band. The first and second watch bands are connected to the sides of the watch body, respectively. The first watch band includes a first leather layer, a middle layer, and a second leather layer stacked sequentially. The middle layer includes a silicone block, a connecting wire, and an antenna. The antenna is electrically connected to the watch body via the connecting wire. This solution solves the space occupation and interference problems caused by traditional antenna placement within the watch face by placing the antenna on the watch band and protecting it with a rigid protective strip, achieving better wearing comfort and reception performance. However, the antenna placement does not effectively utilize the planar area of ​​the watch band, reducing signal reception capability. Therefore, this utility model discloses a smartwatch with an external antenna to solve the above problems. Utility Model Content

[0004] Based on this, it is necessary to address the aforementioned technical issues by providing a smartwatch with an external antenna. This antenna uses a zigzag path along the length of the watchband to form a closed loop, reducing signal loss, enhancing communication quality, effectively utilizing the planar area of ​​the watchband, increasing the effective length of the antenna, extending the conductive path, improving resonance efficiency and multi-band compatibility, reducing sensitivity to electric field interference, providing a more stable response to magnetic fields, and adapting to environmental changes when worn close to the skin.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A smartwatch with an external antenna includes a watch face body, a signal processing module inside the watch face body, a flexible watch strap connected to both sides of the watch face body, an antenna on the watch strap, the antenna being electrically connected to the signal processing module, and the antenna forming a closed loop along the length of the watch strap using a zigzag path.

[0007] In a preferred embodiment of the smartwatch with an external antenna provided by this utility model, one end of the watch strap away from the main body of the watch face is movably connected to a buckle, and the other watch strap has a plurality of buckle holes along its length, the buckle holes avoiding the antenna.

[0008] As a preferred embodiment of the smartwatch with an external antenna provided by this utility model, the antenna is made of any one of copper foil, conductive cloth, printed wire, or LDS laser engraving structure.

[0009] As a preferred embodiment of the smartwatch with an external antenna provided by this utility model, the antenna is located on the side of the watchband away from the human skin and is embedded in the watchband by hot pressing or in-mold injection molding.

[0010] In a preferred embodiment of the smartwatch with an external antenna provided by this utility model, the end of the antenna is connected to a flexible circuit board, and the flexible circuit board is connected to a signal processing module.

[0011] In a preferred embodiment of the smartwatch with an external antenna provided by this utility model, the signal processing module is provided with an interface with a matching circuit, and the flexible circuit board is plugged into the interface.

[0012] In a preferred embodiment of the smartwatch with an external antenna provided by this utility model, the matching circuit is a π-type network composed of inductors and capacitors.

[0013] As a preferred embodiment of the smartwatch with an external antenna provided by this utility model, the watchband includes an inner lining layer, a shielding layer, a flexible circuit board, an antenna, and an outer layer stacked together. The inner lining layer is in contact with human skin, the antenna is arranged on the flexible circuit board, and the flexible circuit board and the shielding layer are embedded in the surface of the outer layer close to human skin.

[0014] In a preferred embodiment of the smartwatch with an external antenna provided by this utility model, the antenna on the watchband is divided into multiple independent paths.

[0015] In a preferred embodiment of the smartwatch with an external antenna provided by this utility model, the antenna length is not less than λ / 4.

[0016] Compared with the prior art, the present invention has the following advantages: The smartwatch with an external antenna provided by the present invention adopts a zigzag path to form a closed loop antenna along the length of the watchband, which reduces signal loss, enhances communication quality, effectively utilizes the planar area of ​​the watchband, increases the effective length of the antenna, extends the conductive path, improves resonance efficiency and multi-band compatibility, reduces sensitivity to electric field interference, has a more stable response to magnetic fields, and can adapt to environmental changes when worn close to the skin. Attached Figure Description

[0017] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall structure of the smartwatch with an external antenna provided by this utility model;

[0019] Figure 2 A schematic diagram of the antenna arrangement in a smartwatch with an external antenna provided by this utility model;

[0020] Figure 3 A schematic diagram of the watch band stacking in a smartwatch with an external antenna provided by this utility model.

[0021] The markings in the diagram are explained as follows:

[0022] 1. Watch face; 2. Signal processing module; 3. Watch strap; 4. Antenna; 5. Clip; 6. Buckle hole; 7. Flexible circuit board; 8. Interface; 9. Inner lining layer; 10. Shielding layer; 11. Outer layer. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] As described in the background section, with the continuous expansion of wearable watch functions, such as receiving network signals and Bluetooth connectivity, the requirements for signal strength are increasing. However, the internal space of a watch is limited, and the signal reception capability of the built-in antenna is also limited. Since the built-in antenna occupies internal space, it may limit the size or function of other components. The antennas in existing watchbands do not effectively utilize the planar area of ​​the watchband, thus reducing signal reception capability.

[0025] To solve this technical problem, this utility model provides a smartwatch with an external antenna, which is applied in the field of smartwatches.

[0026] For details, please refer to Figure 1-3 The smartwatch with an external antenna specifically includes a watch face body 1, a signal processing module 2 inside the watch face body 1, a flexible watch strap 3 connected to both sides of the watch face body 1, an antenna 4 on the watch strap 3, the antenna 4 being electrically connected to the signal processing module 2, and the antenna 4 forming a closed loop along the length of the watch strap 3 using a zigzag path.

[0027] The smartwatch with an external antenna provided by this utility model uses a zigzag path along the length of the watchband 3 to form a closed loop antenna 4, which reduces signal loss, enhances communication quality, effectively utilizes the planar area of ​​the watchband 3, increases the effective length of the antenna 4, extends the conductive path, improves resonance efficiency and multi-band compatibility, reduces sensitivity to electric field interference, has a more stable response to magnetic fields, and can adapt to environmental changes when worn close to the skin.

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] Example 1

[0032] Please refer to Figure 1-3This invention provides a smartwatch with an external antenna, comprising a watch face 1, a signal processing module 2 within the watch face 1, and a flexible watch strap 3 connected to both sides of the watch face 1. An antenna 4 is mounted on the watch strap 3 and electrically connected to the signal processing module 2. The antenna 4 forms a closed loop along the length of the watch strap 3 using a zigzag path. This closed loop structure enhances electromagnetic coupling. The flexible structure of the watch strap 3 ensures that the antenna 4 is not affected during wear. The zigzag arrangement of the antenna 4 along the length of the watch strap 3 effectively reduces signal attenuation and frequency shift caused by human body obstruction, significantly improving the signal strength and stability of wireless communications such as Bluetooth, Wi-Fi, cellular networks, and GNSS. This also effectively increases the effective length of the antenna 4, helping to improve antenna gain and communication efficiency, while providing a wider operating frequency band to adapt to multi-band communication needs.

[0033] Furthermore, one of the watch straps 3 has a movably connected clip 5 at one end away from the main body of the watch face 1, and the other watch strap 3 has several buckle holes 6 along its length. The buckle holes 6 avoid the antenna 4 and are evenly spaced. After the clip 5 is fastened to the buckle holes 6, the main body of the watch face 1 is fixed on the wrist by the watch strap 3, and it can adapt to wrists of different sizes.

[0034] The antenna 4 is made of any one of the following materials: copper foil, conductive cloth, printed wire, or LDS laser engraving structure. When using copper foil, the thickness of the copper foil is 0.05mm-0.1mm. During the fabrication of the antenna 4, for antennas made of copper foil or conductive cloth, a pre-set through-slot is made in the middle of the watchband 3, and the antenna is embedded through a rolling or hot-pressing process. For antennas made through an LDS laser engraving structure, a conductor is formed by laser patterning and electroplating after the watchband 3 blank is injection molded, thus forming the antenna 4. The antenna 4 is positioned on the side of the watchband 3 away from the skin and embedded in the watchband 3 through a hot-pressing or in-mold injection molding process. Positioning the antenna 4 away from the skin reduces absorption by the human body, thereby improving the wireless signal. Furthermore, the feed point of the antenna 4 is located at the end of the watchband 3 closest to the main body 1 of the watch face. A flexible circuit board 7 is connected to the end of the antenna 4, and the flexible circuit board 7 is connected to the signal processing module 2 to achieve stable electrical signal transmission, enhance mechanical strength, and accommodate flexible connections.

[0035] Furthermore, the signal processing module 2 is equipped with an interface 8 with a matching circuit. The flexible circuit board 7 is plugged into the interface 8. The matching circuit is a π-type network composed of inductors and capacitors. The matching circuit ensures that the impedance of the antenna 4 matches that of the signal processing module 2, reduces reflection loss, improves radiation efficiency, and enables fine frequency adjustment to adapt to different frequency bands.

[0036] Example 2

[0037] The smartwatch with an external antenna provided in Embodiment 1 is further optimized, specifically, as follows: Figure 3 As shown, the watch strap 3 includes an inner lining layer 9, a shielding layer 10, a flexible circuit board 7, an antenna 4, and an outer layer 11, which are stacked together. The inner lining layer 9 fits against the human skin, the antenna 4 is arranged on the flexible circuit board 7, and the flexible circuit board 7 and the shielding layer 10 are embedded in the surface of the outer layer 11 that is close to the human skin. The inner lining layer 9 is made of breathable bubble cotton or breathable silicone material, the shielding layer 10 is made of conductive adhesive film or metal foil layer to prevent external electromagnetic interference and improve the stability of the antenna 4, and the outer layer 11 is made of TPU, liquid silicone or PU soft material to protect the internal structure and has waterproof and wear-resistant properties.

[0038] Example 3

[0039] The smartwatch with an external antenna provided in Embodiment 2 is further optimized, specifically, as follows: Figure 1 As shown, the antenna 4 on the watch band 3 is divided into multiple independent paths. In this example, there are two independent paths, which are set on two watch bands 3 respectively. The multiple antenna paths 4 can be designed with different lengths and structures, so that they resonate in different frequency bands, realizing multi-band support (such as Bluetooth, Wi-Fi, LTE, etc.), enhancing the communication capability of the watch, optimizing the matching of antenna 4 and the coverage of resonant frequency bands. When the watch band 3 wraps around the wrist, the antenna 4 is easily affected by shielding interference from human tissue (such as muscles and water). Multiple independent paths can distribute the antenna 4 in different areas of the watch band 3, realizing spatial diversity and effectively reducing signal attenuation caused by local obstruction. The independent paths can avoid mutually interfering path lengths and coupling effects according to the specific wiring design, improve the isolation between the channels of each antenna 4, and improve the communication quality. Furthermore, the length of each antenna segment 4 is not less than λ / 4, where λ is the wavelength of the corresponding frequency. When the length of antenna 4 is 1 / 4 of the wavelength (λ / 4), a first-order resonant point will be formed at that frequency, giving antenna 4 good impedance matching characteristics, improving the radiation efficiency of antenna 4, minimizing reflected waves, increasing the utilization rate of transmission power, reducing the standing wave ratio (SWR), and enhancing system stability. This enhances the radiation efficiency and directivity of antenna 4, which is helpful for long-distance signal transmission and reception. The λ / 4 length of antenna 4 enables the communication module to achieve good matching within the target frequency band, improving communication stability and anti-interference capability.

[0040] The working principle of the smartwatch with an external antenna provided by this utility model is as follows: an antenna 4 is formed by a zigzag path along the length of the watch band 3 to form a closed loop, which increases the radiation area of ​​the antenna 4, reduces attenuation when close to the human body, reduces electromagnetic coupling and shielding effects, improves signal stability, reduces signal loss, enhances communication quality, and can effectively utilize the planar area of ​​the watch band 3 to increase the effective length of the antenna 4, extend the conductive path, improve resonance efficiency and multi-band compatibility, reduce sensitivity to electric field interference, and make the response to magnetic fields more stable, so as to adapt to environmental changes when in close contact with the skin.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A smart watch with an external antenna, comprising a watch body, characterized in that, The main body of the watch face is equipped with a signal processing module. Flexible watch straps are connected to both sides of the main body of the watch face. An antenna is provided on the watch strap. The antenna is electrically connected to the signal processing module. The antenna forms a closed loop along the length of the watch strap using a zigzag path. 2.The smart watch with an external antenna of claim 1, wherein, One of the watch straps has a movably connected buckle at one end away from the main body of the watch face, and the other watch strap has several buckle holes along its length, with the buckle holes avoiding the antenna. 3.The smart watch with an external antenna of claim 1, wherein, The antenna is made of any one of the following materials: copper foil, conductive cloth, printed wire, or LDS laser-engraved structure.

4. The smart watch with an external antenna according to claim 3, characterized in that, The antenna is located on the side of the watchband away from the skin and is embedded in the watchband by hot pressing or in-mold injection molding.

5. The smart watch with an external antenna of claim 1, wherein, The antenna is connected to a flexible circuit board at one end, and the flexible circuit board is connected to the signal processing module.

6. The smart watch with an external antenna according to claim 5, wherein, The signal processing module is equipped with an interface with a matching circuit, and the flexible circuit board is plugged into the interface.

7. The smart watch with an external antenna according to claim 6, characterized in that, The matching circuit is a π-type network composed of inductors and capacitors. 8.The smart watch with an external antenna of claim 5, wherein, The watch band includes a layered inner lining, a shielding layer, a flexible circuit board, an antenna, and an outer layer. The inner lining is fitted to human skin, the antenna is arranged on the flexible circuit board, and the flexible circuit board and the shielding layer are embedded in the surface of the outer layer close to human skin.

9. The smart watch with an external antenna of claim 1, wherein, The antenna on the watchband is divided into multiple independent paths.

10. The smart watch with an external antenna of claim 1, wherein, The antenna length is not less than λ / 4.

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