Wearable intelligent device and manufacturing method thereof

Abstract

The invention discloses a wearable intelligent device and a manufacturing method of the wearable intelligent device, and the wearable intelligent device comprises a metal housing which is recessed inwards to form a groove; the communication circuit is accommodated in the groove and is used for generating or receiving the communication signal; the antenna connecting piece is accommodated in the groove and is connected with the communication circuit and the metal shell, so that the metal shell forms a resonant cavity; the screen is arranged on the opening of the groove and connected with the metal shell in a matched mode so that communication signals can be transmitted through a gap between the metal shell and the screen. Through the mode, the metal shell integrally forms a shielding cover, the influence of a body on the antenna performance in a wearing scene is reduced, the anti-interference performance and the stability of antenna communication are improved, and the production requirement is met.

Description

Technical Field

[0001] The present application relates to the technical field of smart devices, and in particular to a wearable smart device and a method for manufacturing the wearable smart device. Background Art

[0002] With the development of modern technology, more and more wearable smart devices are miniaturized, and within a limited volume, multiple different antennas are often required to cover multiple different frequency bands to achieve different functions. Antennas are required for the communication of wearable smart devices. Due to the size and structure of wearable smart devices, suitable antennas play an important role in the communication quality and also improve the performance of wearable smart devices. Summary of the invention

[0003] The main technical problem solved by the present application is to provide a wearable smart device and a method for manufacturing the wearable smart device, by forming a shielding cover through the overall metal shell, reducing the impact of the body on the antenna performance in the wearing scenario, improving the anti-interference and stability of the antenna communication, and meeting production needs.

[0004] In order to solve the above technical problems, the technical solution adopted in this application provides a wearable smart device.

[0005] Among them, the wearable smart device includes: a metal shell, which is concave inward to form a groove; a communication circuit, accommodated in the groove, for generating or receiving communication signals; an antenna connector, accommodated in the groove, connected to the communication circuit and the metal shell, so that the metal shell forms a resonant cavity; a screen, arranged on the opening of the groove, matching and connected to the metal shell, so as to transmit the communication signal through the gap between the metal shell and the screen.

[0006] The antenna connector is an antenna spring, and the antenna spring includes one or more feed springs and location springs.

[0007] Among them, the wearable intelligent device also includes a circuit board, the communication circuit is arranged on the circuit board, and the antenna spring is arranged at one end of the circuit board and is in contact with the metal shell.

[0008] The cross section of the antenna connector along a direction perpendicular to the bottom of the groove is a triangle.

[0009] Among them, the wearable smart device also includes a battery, which is arranged between the circuit board and the screen, and is connected to the circuit board and the screen respectively, for supplying power to the circuit board and the screen.

[0010] Among them, the antenna connector is arranged in the groove, with the center of the bottom of the groove as the pole and the vertical symmetry line as the starting point. The antenna connector is distributed at a polar diameter equal to the diameter of the groove, and a polar angle of at least one of 30 degrees, 90 degrees, and 180 degrees, transmitting a communication signal of at least one resonant frequency.

[0011] In order to solve the above technical problems, the second aspect of the present application provides a method for manufacturing a wearable smart device, wherein the manufacturing method can manufacture any of the above wearable smart devices.

[0012] Among them, the manufacturing method includes: obtaining metal parts to prepare a metal shell; setting a communication circuit and an antenna connector in the groove, connecting the antenna connector to the metal shell, so that the metal shell forms a resonant cavity; installing a screen in the groove opening of the metal shell, and connecting it to the metal shell to transmit communication signals through the gap between the metal shell and the screen.

[0013] The step of obtaining a metal part to prepare an integrally formed metal shell with a groove includes: etching a groove on the surface of the metal part using a milling cutter to form an integrally formed metal shell.

[0014] The manufacturing method further includes: adjusting the communication circuit and / or the antenna connector so that the communication signal meets a preset resonant frequency; wherein the preset resonant frequency includes at least three different frequencies.

[0015] Among them, the step of adjusting the communication circuit and / or the antenna connector so that the communication signal meets the preset resonant frequency includes: selecting the position of the preset resonant frequency based on the circular position of the Smith chart of the communication circuit according to the metal shell; or selecting the matching inductance and / or capacitance of the communication circuit so that the communication signal of the communication circuit meets the preset resonant frequency; or the antenna connector is an antenna shrapnel, and the antenna shrapnel includes one or more feed shrapnel and location shrapnel; by adjusting the distance between the feed shrapnel and the location shrapnel, the communication signal of the communication circuit meets the preset resonant frequency.

[0016] Different from the prior art, the wearable smart device and the manufacturing method of the wearable smart device provided by the present application form a shielding cover through the overall metal shell, reduce the impact of the body on the antenna performance in the wearing scenario, and improve the anti-interference and stability of the antenna communication. The complete metal shell can ensure the integrity of the device, improve the overall structural strength of the device, improve the layout convenience and space utilization, and can reuse structural parts without adding new antenna structures. It has an easy-to-implement and more sophisticated design, improves satisfaction, and enhances product competitiveness to meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural cross-sectional view of an embodiment of a wearable smart device of the present application;

[0018] Figure 2 is a structural cross-sectional view of another embodiment of the wearable smart device of the present application;

[0019] Figure 3 is a top view of the structure of another embodiment of the wearable smart device of the present application;

[0020] Figure 4 It is a flowchart of an implementation method of a manufacturing method of a wearable smart device of the present application;

[0021] Figure 5 It is a flowchart of another implementation method of the manufacturing method of the wearable smart device of the present application;

[0022] Figure 6 It is a flowchart of another implementation method of the manufacturing method of the wearable smart device of the present application;

[0023] Figure 7 for Figure 6 The Smith chart of the first resonance of step S303 is shown;

[0024] Figure 8 for Figure 6 The schematic diagram of S11 and efficiency simulation of the first resonance of step S303 is shown;

[0025] Fig. 9 for Figure 6 The standing wave ratio curve corresponding to the antenna resonance of the first resonant frequency in step S303 is shown;

[0026] Fig.10 for Figure 6 The standing wave ratio curve corresponding to the antenna resonance of the second resonant frequency and the third resonant frequency in step S303 is shown;

[0027] Fig.11 for Figure 6 The directivity diagram of the first resonant frequency in step S303 is shown. DETAILED DESCRIPTION

[0028] The present application is described in detail below with reference to the accompanying drawings and implementation methods.

[0029] This application first provides a packaging structure, see Figure 1 , Figure 1 It is a structural cross-sectional view of an embodiment of a wearable smart device of the present application.

[0030] like Figure 1 As shown, the wearable smart device 100 provided by the technical solution adopted in this application includes but is not limited to wearable smart devices 100 such as smart watches and smart bracelets that need to be equipped with antennas for communication.

[0031] The wearable smart device 100 includes:

[0032] The metal shell 101 is recessed inward to form a groove 102 .

[0033] The shape of the metal shell 101 can generally be set to be cylindrical, elliptical or rectangular with rounded corners. In order to enable the side wall of the wearable smart device 100 to provide better communication signal propagation, the thickness of the side wall is generally kept uniform, and a groove 102 consistent with the shape of the metal shell 101 is set.

[0034] In order to ensure the integrity of the metal shell 101, a metal shell 101 with a groove 102 is formed by etching with a laser or a milling cutter, so that the back shell and the side of the wearable smart device 100 can be integrally formed. The complete metal shell 101 can ensure the integrity of the device and improve the overall structural strength of the device.

[0035] The communication circuit 103 is accommodated in the groove 102 and is used to generate or receive communication signals.

[0036] The communication circuit 103 includes filters, amplifiers, demodulators, etc. to form a communication transmitting circuit, a communication receiving circuit, etc. By setting corresponding resonant capacitors and inductors, the communication resonant frequency of the antenna can be further adjusted to meet one or more resonant frequencies and effectively adjust the antenna working bandwidth, and the communication circuit 103 can be better laid out in the one-piece molded groove 102.

[0037] The antenna connector 104 is accommodated in the groove 102 and connected to the communication circuit 103 and the metal shell 101 so that the metal shell 101 forms a resonant cavity.

[0038] The antenna connector 104 may be an antenna spring, an antenna feed line, a coupling ring, a slot coupler, an antenna interface module or other components to achieve connection between the communication circuit 103 and the metal housing 101 .

[0039] The electromagnetic energy of the communication signal is concentrated by the resonant cavity so that it can be effectively radiated at the resonant frequency, thereby improving the gain of the antenna, thereby ensuring the antenna performance and the physical size of the wearable smart device 100 without adding additional antennas.

[0040] According to different communication requirements, the size and shape of the groove 102 can also be adjusted, that is, the working bandwidth of the antenna can be adjusted by adjusting the size and shape of the resonant cavity.

[0041] The screen 105 is disposed on the opening of the groove 102 and is matched and connected with the metal shell 101 to transmit communication signals through a gap (not shown) between the metal shell 101 and the screen 105 .

[0042] The screen 105 may be an LCD (Liquid Crystal Display) screen, an OLED (Organic Light-Emitting Diode) screen, an EINK (Electronic Ink) screen, or the like.

[0043] By forming snap-fitting parts or limiting parts on the mounting parts of the metal shell 101 and the screen 105 respectively, the two are snap-fitted and installed to form a radiation gap. The width of the radiation gap can be 0.1mm~2mm, specifically 0.1mm, 0.2mm, 0.5mm, 0.7mm, 1mm, 1.2mm. The specific gap can be set according to the shape and size of the metal shell 101. In general, a gap exceeding 2mm will affect the airtightness and waterproofness, and there will be a more obvious black border, affecting the overall design.

[0044] The communication circuit 103 of the wearable intelligent device 100 works to achieve resonance by exciting the degenerate mode inside the resonant cavity when receiving or transmitting a communication signal, and further transmits high-frequency energy through the slot antenna.

[0045] The metal shell 101 is formed with a metal shielding cover, and the communication module transmits wireless communication signals outward through the metal antenna on the communication side shell side. The wearing side shell is a metal shell 101, which can reduce the impact of the wearable smart device 100 on the human body when it is worn on the human body, ensure that the communication signal transmitted through the slot antenna has better directionality, and improve the communication performance.

[0046] See also Figure 2 and Figure 3 , Figure 2 is a structural cross-sectional view of another embodiment of the wearable smart device 100 of the present application. Figure 3 It is a top view of the structure of another embodiment of the wearable smart device 100 of the present application.

[0047] like Figure 2 As shown, the wearable smart device 100 provided by the technical solution adopted in this application includes but is not limited to wearable smart devices 100 such as smart watches and smart bracelets that need to be equipped with antennas for communication.

[0048] The wearable intelligent device 100 includes a metal shell 101 , which is indented inward to form a groove 102 .

[0049] The communication circuit 103 is accommodated in the groove 102 and is used to generate or receive communication signals. The antenna connector 104 is accommodated in the groove 102 and is connected to the communication circuit 103 and the metal shell 101 so that the metal shell 101 forms a resonant cavity.

[0050] The shape of the metal shell 101 can generally be set to be cylindrical, elliptical or rectangular with rounded corners. In order to provide better communication signal propagation for the side wall of the wearable smart device 100, the thickness of the side wall is generally kept uniform, and a groove 102 consistent with the shape of the metal shell 101 is set.

[0051] In order to ensure the integrity of the metal shell 101, a metal shell 101 with a groove 102 is formed by etching with a laser or a milling cutter, so that the back shell and the side of the wearable smart device 100 can be integrally formed. The complete metal shell 101 can ensure the integrity of the device and improve the overall structural strength of the device.

[0052] The electromagnetic energy of the communication signal is concentrated by the resonant cavity so that it can be effectively radiated at the resonant frequency, thereby improving the gain of the antenna, thereby ensuring the antenna performance and the physical size of the wearable smart device 100 without adding additional antennas.

[0053] According to different communication requirements, the size and shape of the groove 102 can also be adjusted, that is, the working bandwidth of the antenna can be adjusted by adjusting the size and shape of the resonant cavity.

[0054] The communication circuit 103 includes filters, amplifiers, demodulators, etc. to form a communication transmitting circuit, a communication receiving circuit, etc. By setting corresponding resonant capacitors and inductors, the communication resonant frequency of the antenna can be further adjusted to meet one or more resonant frequencies and effectively adjust the working bandwidth of the antenna, and the communication circuit 103 can be better arranged in the one-piece molded groove 102.

[0055] The screen 105 is disposed on the opening of the groove 102 and is matched and connected with the metal shell 101 to transmit communication signals through the gap between the metal shell 101 and the screen 105 .

[0056] The screen 105 may be an LCD (Liquid Crystal Display) screen, an OLED (Organic Light-Emitting Diode) screen, an EINK (Electronic Ink) screen, or the like.

[0057] By forming a snap-on or stopper on the metal shell 101 and the screen 105 installation part respectively, the two are snap-fitted and installed to form a radiation gap. The radiation characteristics of the slot antenna are related to the size of the slot. When the slot width is narrow, the radiation of electromagnetic waves is mainly concentrated in the narrowband frequency range near the slot, and when the slot width is wide, the radiation of electromagnetic waves will be generated in a wider frequency range. Therefore, by adjusting the size of the slot, the radiation and reception of electromagnetic waves in a specific resonant frequency range can be achieved. The width of the radiation slot can be 0.1mm to 2mm, specifically 0.1mm, 0.2mm, 0.5mm, 0.7mm, 1mm, 1.2mm. The specific slot also needs to be set according to the shape and size of the metal shell 101. In general, a slot exceeding 2mm will affect the airtightness and waterproofness, and there will be a more obvious black border, affecting the overall design.

[0058] The communication circuit 103 of the wearable intelligent device 100 works to achieve resonance by exciting the degenerate mode inside the resonant cavity when receiving or transmitting a communication signal, and further transmits high-frequency energy through the slot antenna.

[0059] The metal shell 101 is formed with a metal shielding cover, and the communication module transmits wireless communication signals outward through the metal antenna on the communication side shell side. The wearing side shell is a metal shell 101, which can reduce the impact of the wearable smart device 100 on the human body when it is worn on the human body, ensure that the communication signal transmitted through the slot antenna has better directionality, and improve the communication performance.

[0060] In an optional implementation, the antenna connector 104 is an antenna spring (not shown), and the antenna spring includes one or more feeding springs (not shown) and location springs (not shown).

[0061] Through multiple antenna shrapnel, it is possible to work at one or more resonant frequencies. The antenna shrapnel can be a pressure-spring shrapnel, a side-spring shrapnel, a C-shaped column shrapnel, etc. The resonant frequency of the communication work is achieved by adjusting the feed shrapnel and the location shrapnel.

[0062] Specifically, a main feeding shrapnel may be used to connect multiple operating frequency bands, and an auxiliary feeding shrapnel may be used to increase signal strength or bandwidth, or different feeding shrapnel may be used to connect operating frequency bands with different resonant frequencies.

[0063] In an optional implementation, the wearable smart device 100 further includes a circuit board 106 , the communication circuit 103 is disposed on the circuit board 106 , and the antenna shrapnel is disposed at one end of the circuit board 106 and is in contact with and connected to the metal shell 101 .

[0064] Specifically, by mounting the communication circuit 103 on the circuit board 106, it is convenient to debug the electronic components of the circuit, reduce signal reflection and crosstalk, further improve the anti-interference and communication performance of the communication signal, reduce production costs through modularization, and improve the compactness of the circuit.

[0065] The antenna shrapnel can be assembled quickly and is easy to maintain and replace. It not only provides stable and efficient signal transmission, but also gives the position design on the circuit board 106 greater flexibility and compactness, which helps to achieve the miniaturization and aesthetics of the design of the wearable smart device 100, achieve good impedance matching with the mobile phone antenna and circuit, better cope with temperature changes and mechanical stress changes, maintain the stability of the connection, and provide support for the miniaturization of the wearable smart device 100.

[0066] In an optional implementation, the cross section of the antenna connector 104 along a direction perpendicular to the bottom of the groove 102 is triangular.

[0067] In a specific embodiment, the antenna connector 104 with a triangular cross-section can be an antenna spring. The specific implementation methods include: multiplying the two spring edges by a certain right angle or acute angle, or reinforcing the junction of the two spring edges with a triangular metal sheet to form a triangular cross-section, and contacting the circuit board 106 and the metal shell 101 through the vertices respectively, so as to transmit the communication signal of the communication circuit 103 to the metal shell 101.

[0068] In other practical examples, the antenna connector 104 with a triangular cross-section may be an antenna interface module with a triangular cross-section.

[0069] In an optional implementation, the wearable smart device 100 further includes a battery 107 , which is disposed between the circuit board 106 and the screen 105 , and is respectively connected to the circuit board 106 and the screen 105 , for supplying power to the circuit board 106 and the screen 105 .

[0070] The battery 107 provides stable and appropriate voltage and current for the communication circuit 103 and the screen 105. According to the arrangement of the electronic components of the communication circuit 103, the battery 107 is arranged at the position of the circuit board 106. In order to reduce the electromagnetic influence on the communication signal circuit, the battery 107 can be arranged at the center of the circuit board 106 or away from the antenna shrapnel.

[0071] In an optional embodiment, the antenna connector 104 is disposed in the groove 102, with the center of the bottom of the groove 102 as the pole and the vertical symmetry line as the starting point. The antenna connector 104 is distributed at a pole diameter equal to the diameter of the groove 102 and a polar angle of at least one of 30 degrees, 90 degrees, and 180 degrees, transmitting a communication signal of at least one resonant frequency.

[0072] In order to cooperate with the influence of the wearing mode of the wearable smart device 100 on the antenna signal, in a specific embodiment, the antenna spring is installed on the circuit board 106 as the antenna connector 104, and the installation angle is designed according to the component arrangement of the communication circuit 103 on the circuit board 106, the wearing mode of the wearable smart device 100 and / or other components of the wearable smart device 100 such as a strap, an infrared sensor, a fingerprint sensor, etc., so that the communication circuit 103 has suitable impedance matching, ensures greater coupling efficiency, reduces the sensitivity of the antenna to electromagnetic interference, and there are corresponding setting requirements for the setting of the antenna connector 104 in the groove 102.

[0073] The wearable smart device provided above forms a shielding cover through the overall metal shell, which reduces the impact of the body on the antenna performance in the wearing scenario, improves the anti-interference and stability of the antenna communication, and meets production needs.

[0074] See also Figure 4 , Figure 4 It is a flow chart of the processing steps of an implementation method of a wearable smart device manufacturing method of the present application; wherein, the wearable smart device manufacturing method is used to prepare any of the above-mentioned wearable smart devices 100.

[0075] like Figure 4 As shown, one implementation step of the manufacturing method includes:

[0076] S101: Obtain metal parts to prepare a metal shell.

[0077] The shape of the metal shell can generally be set to be cylindrical, elliptical or rectangular with rounded corners. In order to provide better communication signal propagation for the side wall of the wearable smart device, the thickness of the side wall is generally kept uniform, and a groove consistent with the shape of the metal shell is set.

[0078] The metal shell is obtained through mechanical pressing, laser or milling cutter etching. The complete metal shell can ensure the integrity of the wearable smart device. The shielding cover formed by the metal shell can also improve the anti-interference of the communication signal during wearing, and improve the overall structural strength and certain waterproofness of the wearable smart device.

[0079] S102: Arrange a communication circuit and an antenna connector in the groove, and connect the antenna connector to the metal shell so that the metal shell forms a resonant cavity.

[0080] Specifically, the communication circuit includes filters, amplifiers, demodulators, etc. to form a communication transmitting circuit, a communication receiving circuit, etc. By setting corresponding resonant capacitors and inductors, the communication resonant frequency of the antenna can be further adjusted to meet one or more resonant frequencies and effectively adjust the working bandwidth of the antenna, and the communication circuit can be better laid out in the one-piece molded groove.

[0081] The antenna connector can be an antenna shrapnel, an antenna feeder, a coupling ring, a slot coupler, an antenna interface module and other components to achieve the connection between the communication circuit and the metal shell. The setting of the antenna connector will affect the matching impedance. The position of the antenna connector on the circuit board needs to be selected according to the communication circuit and the metal shell. Since the antenna connector is set inside the groove of the metal shell, the plane polar coordinate system is established with the bottom of the groove as a reference. The antenna connector will be set on the circuit board, that is, on the projection of the point selected by the polar coordinate system. By installing the antenna connector and connecting it to the communication circuit and the metal shell, the metal shell forms a resonant cavity.

[0082] S103: Install a screen in the groove opening of the metal shell and connect it to the metal shell to transmit communication signals through a gap between the metal shell and the screen.

[0083] By forming snap-fitting parts or limiting parts on the metal shell and the screen mounting part respectively, the two are snap-fitted and installed to form a radiation gap. The width of the radiation gap can be 0.1mm~2mm, specifically 0.1mm, 0.2mm, 0.5mm, 0.7mm, 1mm, 1.2mm. The specific gap can be set according to the shape and size of the metal shell. In general, a gap exceeding 2mm will affect the airtightness and waterproofness, and there will be a more obvious black border, affecting the overall design.

[0084] The communication circuit of the wearable smart device works by exciting the degenerate mode inside the resonant cavity when receiving or transmitting a communication signal, and further transmits high-frequency energy through the slot antenna.

[0085] When performing impedance matching, it is necessary to debug while maintaining the integrity of the wearable smart device, so it is necessary to use a visual adjustment tool after installing the screen to determine the working resonant frequency of the wearable smart device.

[0086] See also Figure 5 , Figure 5 It is a flow chart of processing steps of another implementation method of the manufacturing method of the wearable smart device of the present application; wherein, the manufacturing method of the wearable smart device is used to prepare any of the above-mentioned wearable smart devices 100.

[0087] like Figure 5 As shown, another implementation step of the manufacturing method includes:

[0088] The metal parts are obtained to prepare a metal shell.

[0089] In an optional implementation: S201: obtain a metal part, and use a milling cutter to etch a groove on the surface of the metal part to form an integrally formed metal shell.

[0090] The shape of the metal shell can generally be set to be cylindrical, elliptical or rectangular with rounded corners. In order to provide better communication signal propagation for the side wall of the wearable smart device, the thickness of the side wall is generally kept uniform, and a groove consistent with the shape of the metal shell is set.

[0091] The metal shell is obtained by milling and etching. The complete metal shell can ensure the integrity of the wearable smart device. The shielding cover formed by the metal shell can also improve the anti-interference of the communication signal during wearing, and improve the overall structural strength and waterproofness of the wearable smart device. In other embodiments, the metal shell of the present application can be obtained by mechanical pressing and laser etching.

[0092] S202: Arrange a communication circuit and an antenna connector in the groove, and connect the antenna connector to the metal shell so that the metal shell forms a resonant cavity.

[0093] Specifically, the communication circuit includes filters, amplifiers, demodulators, etc. to form a communication transmitting circuit, a communication receiving circuit, etc. By setting corresponding resonant capacitors and inductors, the communication resonant frequency of the antenna can be further adjusted to meet one or more resonant frequencies and effectively adjust the working bandwidth of the antenna, and the communication circuit can be better laid out in the one-piece molded groove.

[0094] The antenna connector can be an antenna shrapnel, an antenna feeder, a coupling ring, a slot coupler, an antenna interface module and other components to achieve the connection between the communication circuit and the metal shell. The setting of the antenna connector will affect the matching impedance. The position of the antenna connector on the circuit board needs to be selected according to the communication circuit and the metal shell. Since the antenna connector is set inside the groove of the metal shell, the plane polar coordinate system is established with the bottom of the groove as a reference. The antenna connector will be set on the circuit board, that is, on the projection of the point selected by the polar coordinate system. By installing the antenna connector and connecting it to the communication circuit and the metal shell, the metal shell forms a resonant cavity.

[0095] In an optional embodiment, it also includes: setting the communication circuit and the antenna connector on the circuit board; installing the battery on the circuit board, connecting the battery to the screen, and supplying power to the circuit board and the screen.

[0096] S203: Adjust the communication circuit and / or the antenna connector so that the communication signal meets a preset resonant frequency; wherein the preset resonant frequency includes at least three different frequencies.

[0097] Specifically, in order to increase the bandwidth of the wearable smart device, it can operate at more resonant frequencies.

[0098] In an optional implementation, the preset resonant frequency may include a first resonant frequency, a second resonant frequency or a third resonant frequency; in a specific embodiment, the first resonant frequency is the antenna resonant frequency of GPS operation, the second resonant frequency is the 2.4G WIFI operating frequency, and the third resonant frequency is the 5G WIFI operating frequency.

[0099] Select a preset resonant frequency as the working resonant frequency of the wearable smart device to perform impedance matching of the communication circuit to maximize energy transfer. The preset resonant frequency can be one or more. In other embodiments, the preset resonant frequency may also include a fourth and a fifth preset resonant frequency, and the preset resonant frequency may also correspond to at least one of a cellular network operating frequency of 2G to 4G, an RFID operating frequency (Radio-Frequency Identification) wireless radio frequency operating frequency, and the like.

[0100] Through visual adjustment tools, such as the Smith chart for determining microwave loss, frequency, system radiation efficiency, and the Apple chart for the direction of antenna radiation, it is determined that the antenna signal and bandwidth meet the optimal operating frequency of the wearable smart device and have the corresponding optimal standing wave ratio, thereby ensuring the communication performance of the wearable smart device.

[0101] By adjusting the size and series-parallel relationship of the resistance, inductance, and capacitance of the communication circuit, or the positional relationship between the antenna connectors, the impedance point can be moved on the Smith chart to achieve the desired matching conditions.

[0102] S204: Install a screen in the groove opening of the metal shell and connect it to the metal shell to transmit communication signals through a gap between the metal shell and the screen.

[0103] The screen can be an LCD (Liquid Crystal Display) screen, an OLED (Organic Light-Emitting Diode) screen, an EINK (Electronic Ink) screen, or the like.

[0104] The gap size is designed according to the required radiation characteristics. By forming snap-fit ​​parts or limit parts on the metal shell and the screen mounting part respectively, the two are snap-fitted and installed to form a radiation gap, thereby realizing the radiation and reception of electromagnetic waves in a specific resonant frequency range.

[0105] The communication circuit of the wearable smart device works by exciting the degenerate mode inside the resonant cavity when receiving or transmitting a communication signal, and further transmits high-frequency energy through the slot antenna.

[0106] When performing impedance matching, it is necessary to debug while maintaining the integrity of the wearable smart device, so it is necessary to use a visual adjustment tool after installing the screen to determine the working resonant frequency of the wearable smart device.

[0107] The metal shell is formed with a metal shielding cover, and the communication module transmits wireless communication signals outward through the metal antenna on the communication side shell side. The wearing side shell is a metal shell, which can reduce the impact of the wearable smart device on the human body when it is worn on the human body, ensure that the communication signal transmitted through the slot antenna has better directionality, and improve the communication performance.

[0108] See also Figure 6 , Figure 6 It is a flow chart of processing steps of another implementation method of the manufacturing method of the wearable smart device of the present application; wherein, the manufacturing method of the wearable smart device is used to prepare any of the above-mentioned wearable smart devices 100.

[0109] like Figure 6 As shown, another implementation step of the manufacturing method includes:

[0110] The metal parts are obtained to prepare a metal shell.

[0111] In an optional implementation: S301: obtain a metal part, and use a milling cutter to etch a groove on the surface of the metal part to form an integrally formed metal shell.

[0112] The shape of the metal shell can generally be set to be cylindrical, elliptical or rectangular with rounded corners. In order to provide better communication signal propagation for the side wall of the wearable smart device, the thickness of the side wall is generally kept uniform, and a groove consistent with the shape of the metal shell is set.

[0113] The metal shell is obtained by milling and etching. The complete metal shell can ensure the integrity of the wearable smart device. The shielding cover formed by the metal shell can also improve the anti-interference of the communication signal during wearing, and improve the overall structural strength and waterproofness of the wearable smart device. In other embodiments, the metal shell of the present application can be obtained by mechanical pressing and laser etching.

[0114] S302: a communication circuit and an antenna connector are arranged in the groove, and the antenna connector is connected to the metal shell so that the metal shell forms a resonant cavity.

[0115] Specifically, the communication circuit includes filters, amplifiers, demodulators, etc. to form a communication transmitting circuit, a communication receiving circuit, etc. By setting corresponding resonant capacitors and inductors, the communication resonant frequency of the antenna can be further adjusted to meet one or more resonant frequencies and effectively adjust the working bandwidth of the antenna, and the communication circuit can be better laid out in the one-piece molded groove.

[0116] The antenna connector can be an antenna shrapnel, an antenna feeder, a coupling ring, a slot coupler, an antenna interface module and other components to achieve the connection between the communication circuit and the metal shell. The setting of the antenna connector will affect the matching impedance. The position of the antenna connector on the circuit board needs to be selected according to the communication circuit and the metal shell. Since the antenna connector is set inside the groove of the metal shell, the plane polar coordinate system is established with the bottom of the groove as a reference. The antenna connector will be set on the circuit board, that is, on the projection of the point selected by the polar coordinate system. By installing the antenna connector and connecting it to the communication circuit and the metal shell, the metal shell forms a resonant cavity.

[0117] In an optional embodiment, it also includes: setting the communication circuit and the antenna connector on the circuit board; installing the battery on the circuit board, connecting the battery to the screen, and supplying power to the circuit board and the screen.

[0118] The communication circuit and / or the antenna connector are adjusted so that the communication signal meets a preset resonant frequency; wherein the preset resonant frequency includes at least three different frequencies.

[0119] Specifically, in order to increase the bandwidth of the wearable smart device, it can operate at more resonant frequencies.

[0120] In an optional embodiment, S303: according to the metal shell, the position of the preset resonant frequency is selected based on the circular position of the Smith chart of the communication circuit; or the matching inductance and / or capacitance of the communication circuit is selected so that the communication signal of the communication circuit meets the preset resonant frequency; or the antenna connector is an antenna spring, and the antenna spring includes one or more feed springs and location springs; by adjusting the distance between the feed spring and the location spring, the communication signal of the communication circuit meets the preset resonant frequency.

[0121] The preset resonant frequency may include a first resonant frequency, a second resonant frequency or a third resonant frequency. In a specific embodiment, the first resonant frequency is the antenna resonant frequency of GPS operation, the second resonant frequency is the 2.4G WIFI operation frequency, and the third resonant frequency is the 5G WIFI operation frequency.

[0122] The preset resonant frequency is selected as the working resonant frequency of the wearable smart device to perform impedance matching of the communication circuit to achieve maximum energy transmission. The preset resonant frequency can be one or more. In other embodiments, the preset resonant frequency can also include a fourth and a fifth preset resonant frequency. The preset resonant frequency can also correspond to at least one of the cellular network working frequency of 2G to 4G, the RFID working frequency (Radio-Frequency Identification) wireless radio frequency working frequency, etc.

[0123] Please also read Figure 7 to Figure 11 , Figure 7 for Figure 6 The Smith chart of the first resonance of step S303 is shown, Figure 8 for Figure 6 The schematic diagram of S11 and efficiency simulation of the first resonance of step S303 is shown, Fig. 9 for Figure 6 The standing wave ratio curve corresponding to the antenna resonance of the first resonant frequency in step S303 is shown, Fig.10 of Figure 6 The standing wave ratio curve corresponding to the antenna resonance of the second resonant frequency and the third resonant frequency in step S303 is shown, Fig.11 for Figure 6 The directivity diagram of the first resonant frequency in step S303 is shown.

[0124] The communication circuit and / or the antenna connector are adjusted so that the circular position of the Smith chart of the communication circuit meets the position of the preset resonant frequency.

[0125] Through visual adjustment tools, such as the Smith chart for determining microwave loss, frequency, system radiation efficiency, and the Apple chart for the direction of antenna radiation, it is determined that the antenna signal and bandwidth meet the optimal operating frequency of the wearable smart device and have the corresponding optimal standing wave ratio, thereby ensuring the communication performance of the wearable smart device.

[0126] The impedance plane on the Smith chart is divided into four quadrants, each quadrant represents a different characteristic of impedance, and displays complex impedance or admittance in a graphical way. The first quadrant represents an impedance value with a positive real part and a positive imaginary part. In RF design, the impedance characteristics of the first quadrant are often used to match the characteristic impedance of the transmission line to reduce signal reflection and transmission loss and improve energy transmission efficiency.

[0127] By adjusting the size and series-parallel relationship of the resistance, inductance, and capacitance of the communication circuit, or the positional relationship between the antenna connectors, the impedance point can be moved on the Smith chart to achieve the desired matching conditions.

[0128] In a specific embodiment, the specific steps of adjusting the communication circuit and / or the antenna connector so that the circular position of the Smith chart of the communication circuit meets the position of the preset resonant frequency include:

[0129] Adjust the distance between the feed and the location shrapnel, and adjust the initial circle position of the Smith chart to facilitate the initial communication matching. When the location shrapnel is not directly grounded, the communication circuit can be adjusted by connecting inductors and capacitors in series, and the matching point position on the Smith chart can be further adjusted to optimize impedance matching and circuit performance. This design allows for more flexible adjustment of the operating frequency of the communication circuit to meet the communication needs of the product.

[0130] In other embodiments, other matching forms may be used to achieve the resonance effect by approaching the 50-ohm center circle of the Smith chart.

[0131] like Figure 7 and Figure 8 The communication signal shown to be impedance matched operates at a first resonant frequency, which operates at the GPS operating frequency.

[0132] Figure 7 for Figure 6 The Smith chart of the first resonance of step S303 is shown, Figure 3 The hollow point with a value of 0.5 is the starting point, and the point with a value of 2 is the matching point.

[0133] Please refer to Figure 8 , Figure 8 for Figure 6 The schematic diagram of S11 and efficiency simulation of the first resonance of step S303 shown in the figure; in this schematic diagram, the horizontal axis is frequency (Frequency), the unit is GHz, and the unit of the vertical axis is dB. In this schematic diagram, curve 1 is the S parameter curve of the wearable smart device supporting the GPS operating frequency of the first resonance frequency; curve 2 is the system radiation efficiency (System Rad.Efficiency) curve of the wearable smart device supporting the GPS operating frequency of the first resonance frequency; curve 3 is the system total efficiency (SystemTot.Efficiency) curve of the wearable smart device supporting the GPS operating frequency of the first resonance frequency.

[0134] In an optional implementation, the method further includes: adjusting the resonant frequency of the communication signal to satisfy a preset standing wave ratio.

[0135] During the matching process, references such as Fig. 9 The standing wave ratio curve corresponding to the antenna resonance of the first resonant frequency shown in FIG. Fig.10 The standing wave ratio graph corresponding to the antenna resonances of the second resonant frequency and the third resonant frequency shown in the figure, the abscissa of the standing wave ratio graph is the corresponding resonant frequency (Frequcency), and the ordinate is the standing wave ratio (VSWR, Voltage Standing Wave Ratio).

[0136] Fig.11 for Figure 1 The antenna assembly shown has a radiation pattern when operating in the transmission frequency band of the first frequency band. The phi corresponding to the radiation pattern is the angle in the azimuth plane (horizontal plane) ranging from 0 to 360 degrees, and theta is the angle in the pitch plane (vertical plane) ranging from 0 to 180 degrees. The plane structure shown in the radiation pattern is a circuit board.

[0137] Within the resonant frequency range, adjusting the working resonant frequency corresponds to adjusting the corresponding standing wave ratio. The smaller the standing wave ratio, the smaller the reflection and the better the signal matching.

[0138] S304: Install a screen in the groove opening of the metal shell and connect it to the metal shell to transmit communication signals through a gap between the metal shell and the screen.

[0139] The screen can be an LCD (Liquid Crystal Display) screen, an OLED (Organic Light-Emitting Diode) screen, an EINK (Electronic Ink) screen, or the like.

[0140] The gap size is designed according to the required radiation characteristics. By forming snap-fit ​​parts or limit parts on the metal shell and the screen mounting part respectively, the two are snap-fitted and installed to form a radiation gap, thereby realizing the radiation and reception of electromagnetic waves in a specific resonant frequency range.

[0141] The communication circuit of the wearable smart device works by exciting the degenerate mode inside the resonant cavity when receiving or transmitting a communication signal, and further transmits high-frequency energy through the slot antenna.

[0142] When performing impedance matching, it is necessary to debug while maintaining the integrity of the wearable smart device, so it is necessary to use a visual adjustment tool after installing the screen to determine the working resonant frequency of the wearable smart device.

[0143] The metal shell is formed with a metal shielding cover, and the communication module transmits wireless communication signals outward through the metal antenna on the communication side shell side. The wearing side shell is a metal shell, which can reduce the impact of the wearable smart device on the human body when it is worn on the human body, ensure that the communication signal transmitted through the slot antenna has better directionality, and improve the communication performance.

[0144] Through the above method, a wearable smart device and a method for manufacturing the wearable smart device are provided. A shielding cover is formed by the overall metal shell to reduce the impact of the body on the antenna performance in the wearing scenario, and improve the anti-interference and stability of the antenna communication. The complete metal shell can ensure the integrity of the device, improve the overall structural strength of the device, improve the layout convenience and space utilization, and can reuse structural parts without adding new antenna structures. It has an easy-to-implement and more sophisticated design, improves satisfaction, and enhances product competitiveness to meet production needs.

[0145] In the several embodiments provided in the present application, it should be understood that the disclosed systems and devices can be implemented in other ways. For the technical solutions in the embodiments of the present application, it is obvious that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. For example, the device implementation described above is only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0146] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0147] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "coupled", "connected", "connected", "set", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0148] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0149] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0150] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A wearable smart device, characterized in that: The wearable intelligent device comprises: A metal shell, wherein the metal shell is inwardly recessed to form a groove; A communication circuit, contained in the groove, for generating or receiving a communication signal; An antenna connector is accommodated in the groove and connected to the communication circuit and the metal shell so that the metal shell forms a resonant cavity; The screen is arranged on the groove opening and matched with the metal shell to transmit communication signals through the gap between the metal shell and the screen.

2. The wearable smart device according to claim 1, characterized in that: The antenna connector is an antenna spring, and the antenna spring includes one or more feed springs and a location spring.

3. The wearable smart device according to claim 2, characterized in that: The wearable intelligent device also includes a circuit board, the communication circuit is arranged on the circuit board, and the antenna spring is arranged at one end of the circuit board and is in contact with and connected to the metal shell.

4. The wearable smart device according to any one of claims 1 to 3, characterized in that: The cross section of the antenna connecting piece along a direction perpendicular to the bottom of the groove is triangular.

5. The wearable smart device according to claim 3, characterized in that: The wearable intelligent device also includes a battery, which is arranged between the circuit board and the screen, and is connected to the circuit board and the screen respectively, for supplying power to the circuit board and the screen.

6. The wearable smart device according to claim 2, characterized in that: The antenna connector is arranged in the groove, with the center of the bottom of the groove as the pole and the vertical symmetry line as the starting point. The antenna connector is distributed at a pole diameter equal to the groove diameter and a polar angle of at least one of 30 degrees, 90 degrees, and 180 degrees, transmitting a communication signal of at least one resonant frequency.

7. A method for manufacturing a wearable intelligent device, characterized in that: The manufacturing method can be manufactured into a wearable intelligent device according to any one of claims 1 to 6; the manufacturing method comprises: Obtaining metal parts to prepare metal shells; A communication circuit and an antenna connector are arranged in the groove, and the antenna connector is connected to the metal shell so that the metal shell forms a resonant cavity; A screen is installed in the groove opening of the metal shell and connected to the metal shell so as to transmit communication signals through the gap between the metal shell and the screen.

8. The method for manufacturing a wearable intelligent device according to claim 7, characterized in that: The step of obtaining a metal part to prepare an integrally formed metal shell with a groove comprises: The groove is etched on the surface of the metal part by using a milling cutter to form the integrally formed metal shell.

9. The method for manufacturing a wearable intelligent device according to claim 7, characterized in that: The production method further comprises: The communication circuit and / or the antenna connector are adjusted so that the communication signal meets a preset resonant frequency; wherein the preset resonant frequency includes at least three different frequencies.

10. The manufacturing method of the wearable intelligent device according to claim 9, characterized in that: The step of adjusting the communication circuit and / or the antenna connector so that the communication signal meets a preset resonant frequency includes: According to the metal shell, selecting a matching inductor and / or capacitor of the communication circuit so that the communication signal of the communication circuit meets a preset resonant frequency; or Selecting the position of the preset resonant frequency based on the position of a Smith chart of the communication circuit; or The antenna connector is an antenna spring, and the antenna spring includes one or more feeding springs and location springs; by adjusting the distance between the feeding spring and the location spring, the communication signal of the communication circuit meets the preset resonant frequency.

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