Antenna device of wireless earphone and wireless earphone

Abstract

The utility model relates to the technical field of earphones, in particular to an antenna device of a wireless earphone and the wireless earphone. The antenna device comprises a main circuit board which is provided with a first feed part and a first ground end; the flexible circuit board is provided with a monopole antenna and a parasitic antenna, the monopole antenna is used for receiving a first frequency band, the parasitic antenna is used for receiving a second frequency band, the monopole antenna is coupled with the parasitic antenna, and the monopole antenna is provided with a second feed part and a second ground end electrically connected with the second feed part; the second feed part is electrically connected with the first feed part, and the second ground end is electrically connected with the first ground end. The antenna device can meet the requirements of smaller space and smaller height, ensures the efficiency and performance of the antenna, is lower in cost compared with a laser etching mode, can increase the bandwidth of the antenna device of the wireless earphone through the coupling of the monopole antenna and the parasitic antenna, and has good antenna transmission performance.

Description

Technical Field

[0001] The utility model relates to the technical field of earphones, in particular to an antenna device of a wireless earphone and a wireless earphone. Background Art

[0002] Earphones are a pair of conversion units that receive electrical signals from a media player or receiver and convert them into audible sound waves using speakers close to the ears. Wireless earphones communicate with electronic devices such as mobile phones through Bluetooth or other wireless transmission modules to obtain audio signals, and are becoming more and more popular due to their portability. Therefore, wireless earphones are also developing towards being lightweight and miniaturized. Antennas are involved in the process of transmitting audio signals.

[0003] In the related art, the internal space of wireless earphones is small, the main circuit board is small, and there are many components. The height distance between the inner wall of the shell of the wireless earphone and the main circuit board is limited. The existing ceramic patch antenna and PIFA (Planar Inverted F-shaped Antenna) antenna, i.e., the planar inverted F-shaped antenna, cannot meet the space and height requirements and cannot guarantee the antenna efficiency. Another solution is to use LDS (Laser-Direct-structuring) antenna, however, LDS antenna laser engraving requires special materials and is relatively expensive. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present utility model is to provide an antenna device for a wireless headset and a wireless headset, so as to solve the problem that the antenna design of the wireless headset in the prior art cannot meet the requirements of a smaller space, a smaller height and a lower cost.

[0005] The utility model discloses an antenna device for a wireless headset, comprising:

[0006] A main circuit board, on which a first feeding portion and a first ground terminal are arranged;

[0007] A flexible circuit board, wherein a monopole antenna, a parasitic antenna and a second ground terminal are arranged on the flexible circuit board, the monopole antenna is used to receive a first frequency band, the parasitic antenna is used to receive a second frequency band, the monopole antenna is coupled with the parasitic antenna, a second feeding part is arranged on the monopole antenna, the second feeding part is electrically connected to the first feeding part and the second ground terminal, and the second ground terminal is electrically connected to the first ground terminal.

[0008] Optionally, a clearance area is provided on the main circuit board, and the position of the clearance area corresponds to the position of the monopole antenna and the parasitic antenna and at least covers the orthographic projection area of ​​the monopole antenna and the parasitic antenna on the main circuit board.

[0009] Optionally, the first feeding portion is arranged close to an edge of the main circuit board, the monopole antenna and the parasitic antenna are both arranged close to an edge of the flexible circuit board, and the position of the second feeding portion corresponds to the position of the first feeding portion.

[0010] Optionally, the line width of the monopole antenna is 0.8 mm-1.5 mm.

[0011] Optionally, the clearance area extends inward from the edge of the main circuit board to a preset width, and the preset width is 2 mm-4 mm.

[0012] Optionally, the line width of the parasitic antenna is 0.8 mm-1.5 mm.

[0013] Optionally, a touch control portion is further provided on the flexible circuit board, and the touch control portion is electrically connected to the main circuit board.

[0014] Optionally, a minimum distance between an edge of the touch portion and an edge of the monopole antenna is greater than 2 mm, and a minimum distance between an edge of the touch portion and an edge of the parasitic antenna is greater than 2 mm.

[0015] The utility model also discloses a wireless headset, comprising a shell and the above-mentioned antenna device of the wireless headset, wherein the main circuit board of the antenna device is arranged in the shell, and the flexible circuit board of the antenna device is mounted on the inner wall surface of the shell.

[0016] Optionally, the wireless headset also includes a first conductive spring clip and a second conductive spring clip, the first feeding part on the main circuit board is electrically connected to the second feeding part of the monopole antenna through the first conductive spring clip, and the first ground terminal on the main circuit board is electrically connected to the second ground terminal of the flexible circuit board through the second conductive spring clip.

[0017] Compared with the prior art, the antenna device of the wireless headset and the wireless headset provided by the embodiments of the utility model have the following beneficial effects: by setting a main circuit board and a flexible circuit board, a monopole antenna, a parasitic antenna and a second ground terminal are set on the flexible circuit board, the monopole antenna is coupled with the parasitic antenna, the second feeding part of the monopole antenna is electrically connected to the second ground terminal and the first feeding part of the main circuit board, the second ground terminal is electrically connected to the first ground terminal of the main circuit board, the monopole antenna and the parasitic antenna are designed in the form of a flexible circuit board and can be mounted on the inner wall surface of the shell of the wireless headset, and the monopole antenna is relatively small in height. The overall antenna design can meet the requirements of smaller space and smaller height, ensure antenna efficiency and performance, and have lower cost than the laser engraving method. In addition, the coupling of the monopole antenna and the parasitic antenna can increase the bandwidth of the antenna device of the wireless headset and has good antenna transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 It is a structural schematic diagram of a flexible circuit board of an antenna device provided in an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a main control circuit board of an antenna device provided in an embodiment of the utility model.

[0021] The reference numerals in the figures are:

[0022] 10. Main circuit board; 11. First power feeding unit; 12. First ground terminal; 10a. Clearance area; 13. Second touch conductive pad; 20. Flexible circuit board; 21. Monopole antenna; 211. Second power feeding unit; 22. Parasitic antenna; 23. Second ground terminal; 24. Touch unit; 241. First touch conductive pad. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0024] The present utility model provides an antenna device for a wireless headset, such as Figure 1 and Figure 2 As shown, the antenna device of the wireless headset includes a main circuit board 10 and a flexible circuit board 20.

[0025] A first feeding portion 11 and a first ground terminal 12 are disposed on the main circuit board 10 .

[0026] A monopole antenna 21 and a parasitic antenna 22 are provided on the flexible circuit board 20. The monopole antenna 21 is used to receive the first frequency band, the parasitic antenna 22 is used to receive the second frequency band, the monopole antenna 21 is coupled with the parasitic antenna 22, and the monopole antenna 21 is provided with a second feeding portion 211 and a second ground terminal 23 electrically connected to the second feeding portion 211. The second feeding portion 211 is electrically connected to the first feeding portion 11, and the second ground terminal 23 is electrically connected to the first ground terminal 12.

[0027] The embodiment of the utility model is provided with a main circuit board 10 and a flexible circuit board 20, and a monopole antenna 21, a parasitic antenna 22 and a second ground terminal 23 are provided on the flexible circuit board 20, the monopole antenna 21 is coupled with the parasitic antenna 22, the second feeding part 211 of the monopole antenna 21 is electrically connected to the second ground terminal 23 and the first feeding part 11 of the main circuit board 10, and the second ground terminal 23 is electrically connected to the first ground terminal 12 of the main circuit board 10, the monopole antenna 21 and the parasitic antenna 22 are designed in the form of a flexible circuit board 20 and can be mounted on the inner wall surface of the shell of the wireless headset, and the monopole antenna 21 is relatively small in height, and the overall antenna design can meet the requirements of a smaller space and a smaller height, ensure the antenna efficiency and performance, and have a lower cost than the laser engraving method, and the coupling of the monopole antenna 21 and the parasitic antenna 22 can increase the bandwidth of the antenna device of the wireless headset, and has good antenna transmission performance.

[0028] The monopole antenna 21 has a relatively small area and a low height, which can meet the needs of a small space and a small height, and ensure antenna efficiency and performance. The monopole antenna 21 is the main antenna of the antenna device, and the parasitic antenna 22 is the auxiliary antenna. The monopole antenna 21 and the parasitic antenna 22 are coupled and used to increase the bandwidth of the antenna device.

[0029] The second feeding part 211 of the monopole antenna 21 can be electrically connected to the first feeding part 11 of the main circuit board 10 through a wire, and the second ground terminal 23 can also be electrically connected to the first ground terminal 12 of the main circuit board 10 through a wire. Alternatively, the second feeding part 211 of the monopole antenna 21 is electrically connected to the first feeding part 11 of the main circuit board 10 through a conductive spring clip, and the second ground terminal 23 can also be electrically connected to the first ground terminal 12 of the main circuit board 10 through a conductive spring clip.

[0030] refer to Figure 2 In this embodiment, a clearance area 10a is provided on the main circuit board 10, and the position of the clearance area 10a corresponds to the position of the monopole antenna 21 and the parasitic antenna 22 and at least covers the positive projection area of ​​the monopole antenna 21 and the parasitic antenna 22 on the main circuit board 10.

[0031] The clearance area 10a is a blank area on the main circuit board 10, and no components are arranged in the blank area. By arranging the clearance area 10a on the main circuit board 10 relative to the position of the monopole antenna 21 and the parasitic antenna 22, the distance between the monopole antenna 21 and the parasitic antenna 22 and the components on the main circuit board 10 can be increased, the relative height of the monopole antenna 21 and the parasitic antenna 22 can be increased, the interference of the components on the monopole antenna 21 and the parasitic antenna 22 can be reduced, sufficient space can be reserved for the monopole antenna 21 and the parasitic antenna 22, and the radiation efficiency of the antenna device can be improved.

[0032] Furthermore, the first feeding portion 11 is disposed close to the edge of the main circuit board 10 , the monopole antenna 21 and the parasitic antenna 22 are both disposed close to the edge of the flexible circuit board 20 , and the position of the second feeding portion 211 corresponds to the position of the first feeding portion 11 .

[0033] By arranging the first feeder 11 close to the edge of the main circuit board 10, the monopole antenna 21 and the parasitic antenna 22 close to the edge of the flexible circuit board 20, and the position of the second feeder 211 corresponding to the position of the first feeder 11, the radiation effect can be improved, interference can be reduced, and wiring can be simplified. Specifically, the arrangement of the first feeder 11, the monopole antenna 21, and the parasitic antenna 22 close to the edge can promote edge radiation, thereby enhancing the radiation effect of the antenna, improving the radiation characteristics and coverage of the antenna; compared with being arranged in the middle of the component layout area, being arranged close to the edge can reduce the interference of other circuits and components on the antenna radiation to a certain extent, and improve the overall stability; reducing the length of the signal transmission path, reducing signal loss, and helping to optimize the overall layout of the antenna design.

[0034] Furthermore, the first ground terminal 12 on the main circuit board 10 may also be arranged near the edge of the main circuit board 10, and the second ground terminal 23 on the flexible circuit board 20 may also be arranged near the edge of the flexible circuit board 20. The specific positions of the first ground terminal 12 and the second ground terminal 23 may be arranged according to the layout of components on the main circuit board 10, the monopole antenna 21, the parasitic antenna 22 and other circuit layouts on the flexible circuit board 20.

[0035] In this embodiment, the line width of the monopole antenna 21 is 0.8 mm-1.5 mm, and the monopole antenna 21 has better transmission efficiency and transmission performance. The line width of the monopole antenna 21 can be 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm. Preferably, the line width of the monopole antenna 21 is 1.0 mm, and the monopole antenna 21 has better frequency response and radiation characteristics.

[0036] Further, the clearance area 10a extends inward from the edge of the main circuit board 10 to a preset width, and the preset width is 2mm-4mm. The preset width of the clearance area 10a extending inward from the edge of the main circuit board 10 can be set according to the positive projection area of ​​the monopole antenna 21 and the parasitic antenna 22 on the main circuit board 10. When the line width of the monopole antenna 21 is 0.8mm-1.5mm, the preset width of the clearance area 10a extending inward from the edge of the main circuit board 10 is set to 2mm-4mm, which can increase the distance between the monopole antenna 21 and the parasitic antenna 22 and the components on the main circuit board 10, reduce the interference of the components on the monopole antenna 21 and the parasitic antenna 22, reserve enough space for the monopole antenna 21 and the parasitic antenna 22, improve the radiation efficiency of the antenna device, and at the same time, provide a reasonable layout space for other components on the main circuit board 10, and optimize the layout of the overall components of the overall antenna device.

[0037] The preset width of the clearance area 10a extending from the edge of the main circuit board 10 to the inside is 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4.0mm. Preferably, the preset width of the clearance area 10a extending from the edge of the main circuit board 10 to the inside is 3.0mm, which reduces the interference of components on the main circuit board 10 to the monopole antenna 21 and the parasitic antenna 22, and at the same time, allows sufficient space for the layout of other components of the main circuit board 10.

[0038] In this embodiment, the line width of the parasitic antenna 22 is 0.8 mm-1.5 mm. 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm. Preferably, the line width of the parasitic antenna 22 is 1.0 mm, and the parasitic antenna 22 has excellent frequency response and radiation characteristics.

[0039] refer to Figure 1 and Figure 2 In this embodiment, a touch control unit 24 is also provided on the flexible circuit board 20, and the touch control unit 24 is electrically connected to the main circuit board 10. By providing the touch control unit 24 on the flexible circuit board 20, the touch control unit 24 can generate a signal under the touch of the user, and the signal is transmitted to the main circuit board 10 for subsequent processing to realize the touch function of the applied wireless headset. The touch control unit 24 is also designed in the form of a flexible circuit board 20, and can be mounted on the inner wall surface of the shell of the wireless headset, which is conducive to the miniaturization of the antenna device, the miniaturization of the wireless headset, and convenient for the user's touch control.

[0040] Specifically, a first touch conductive pad 241 can be set on the touch part 24, and a corresponding second touch conductive pad 13 can be set on the main control circuit board. The electrical connection between the touch part 24 and the main control circuit board can be achieved through the electrical connection between the first touch conductive pad 241 and the second touch conductive pad 13.

[0041] Furthermore, the minimum distance between the edge of the touch portion 24 and the edge of the monopole antenna 21 is greater than 2 mm, and the minimum distance between the edge of the touch portion 24 and the edge of the parasitic antenna 22 is greater than 2 mm, which can reduce the impact of the touch signal of the touch portion 24 on the monopole antenna 21 and the parasitic antenna 22. The minimum distance between the edge of the touch portion 24 and the edge of the monopole antenna 21 can be Figure 1 Where d1 indicates that the minimum distance between the edge of the touch portion 24 and the edge of the parasitic antenna 22 can be Figure 1 In it, d2 represents.

[0042] The present application also provides a wireless headset, which includes a shell and an antenna device as described above. The main circuit board 10 of the antenna device is arranged in the shell, and the flexible circuit board 20 of the antenna device is mounted on the inner wall surface of the shell.

[0043] The antenna device in the wireless headset is provided with a main circuit board 10 and a flexible circuit board 20, and a monopole antenna 21, a parasitic antenna 22 and a second ground terminal 23 are provided on the flexible circuit board 20. The monopole antenna 21 is coupled with the parasitic antenna 22, and the second feeding part 211 of the monopole antenna 21 is electrically connected to the second ground terminal 23 and the first feeding part 11 of the main circuit board 10. The second ground terminal 23 is electrically connected to the first ground terminal 12 of the main circuit board 10. The monopole antenna 21 and the parasitic antenna 22 are designed in the form of a flexible circuit board 20 and can be mounted on the inner wall surface of the shell of the wireless headset, and the monopole antenna 21 is relatively small in height. The overall antenna design can meet the requirements of smaller space and smaller height, ensure antenna efficiency and performance, and have lower cost than the laser engraving method. In addition, the coupling of the monopole antenna 21 and the parasitic antenna 22 can increase the bandwidth of the antenna device of the wireless headset and have good antenna transmission performance.

[0044] In this embodiment, the wireless headset also includes a first conductive spring (not shown) and a second conductive spring (not shown), the first feeding part 11 on the main circuit board 10 is electrically connected to the second feeding part 211 of the monopole antenna 21 through the first conductive spring, and the first ground terminal 12 on the main circuit board 10 is electrically connected to the second ground terminal 23 of the flexible circuit board 20 through the second conductive spring.

[0045] By providing a first conductive spring sheet, the first feeder 11 on the main circuit board 10 is electrically connected to the second feeder 211 of the monopole antenna 21, allowing a certain distance error variation between the first feeder 11 and the second feeder 211, that is, allowing a certain distance error variation between the main circuit board 10 and the inner wall of the shell, so that the electrical connection between the first feeder 11 and the second feeder 211 is stable. Similarly, by providing a second conductive spring sheet, the first ground terminal 12 on the main circuit board 10 is electrically connected to the second ground terminal 23 of the flexible circuit board 20, allowing a certain distance error variation between the first ground terminal 12 and the second ground terminal 23, that is, allowing a certain distance error variation between the main circuit board 10 and the inner wall of the shell, so that the first ground terminal 12 and the second ground terminal 23 are electrically connected.

[0046] The first conductive spring sheet and the second conductive spring sheet may be made of conductive materials such as copper, aluminum or alloy.

[0047] The first conductive spring sheet can be fixed on the main circuit board 10 by welding and electrically connected to the first feeding part 11 on the main circuit board 10. The second conductive spring sheet can be fixed on the main circuit board 10 by welding and electrically connected to the first ground terminal 12 on the main circuit board 10.

[0048] The wireless earphones can be true wireless stereo earphones or open-back true wireless stereo earphones.

[0049] The shell of the wireless headset can be set to an oval shape according to needs, and adaptably, the main circuit board 10 can also be specifically set to an oval shape.

[0050] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. An antenna device for a wireless headset, characterized in that: include: A main circuit board, on which a first feeding portion and a first ground terminal are arranged; and a flexible circuit board, wherein a monopole antenna, a parasitic antenna and a second ground terminal are arranged on the flexible circuit board, the monopole antenna is used to receive a first frequency band, the parasitic antenna is used to receive a second frequency band, the monopole antenna is coupled with the parasitic antenna, a second feeder is arranged on the monopole antenna, the second feeder is electrically connected to the first feeder and the second ground terminal, and the second ground terminal is electrically connected to the first ground terminal.

2. The antenna device for wireless earphones according to claim 1, characterized in that: A clearance area is provided on the main circuit board, the position of the clearance area corresponds to the positions of the monopole antenna and the parasitic antenna and at least covers the orthographic projection areas of the monopole antenna and the parasitic antenna on the main circuit board.

3. The antenna device for wireless earphones according to claim 2, characterized in that: The first feeder is arranged close to the edge of the main circuit board, the monopole antenna and the parasitic antenna are arranged close to the edge of the flexible circuit board, and the position of the second feeder corresponds to the position of the first feeder.

4. The antenna device for wireless earphones according to claim 3, characterized in that: The line width of the monopole antenna is 0.8 mm-1.5 mm.

5. The antenna device for wireless earphones according to claim 4, characterized in that: The clearance area extends inward from the edge of the main circuit board to a preset width, and the preset width is 2 mm-4 mm.

6. The antenna device for wireless earphones according to claim 4, characterized in that: The line width of the parasitic antenna is 0.8 mm-1.5 mm.

7. The antenna device for wireless earphones according to any one of claims 1 to 6, characterized in that: The flexible circuit board is also provided with a touch control portion, and the touch control portion is electrically connected to the main circuit board.

8. The antenna device for wireless earphones according to claim 7, characterized in that: The minimum distance between the edge of the touch portion and the edge of the monopole antenna is greater than 2 mm, and the minimum distance between the edge of the touch portion and the edge of the parasitic antenna is greater than 2 mm.

9. A wireless headset, characterized in that: The invention comprises a shell and an antenna device of a wireless headset as claimed in any one of claims 1 to 8, wherein a main circuit board of the antenna device is arranged in the shell, and a flexible circuit board of the antenna device is mounted on an inner wall surface of the shell.

10. The wireless headset according to claim 9, characterized in that: The wireless headset also includes a first conductive spring sheet and a second conductive spring sheet. The first feeding part on the main circuit board is electrically connected to the second feeding part of the monopole antenna through the first conductive spring sheet, and the first ground terminal on the main circuit board is electrically connected to the second ground terminal of the flexible circuit board through the second conductive spring sheet.

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