An FPC antenna and Bluetooth adapter

Abstract

The utility model relates to the technical field of bluetooth adapter, specifically relates to a kind of FPC antenna and bluetooth adapter.The antenna wiring includes antenna main body, antenna feed pin and antenna feed ground pin.The antenna main body includes sequentially bent connection's first walk segment, second walk segment, third walk segment, fourth walk segment;The first walk segment and the third walk segment are set on the same side of the second walk segment, and the fourth walk segment is set on the side opposite to the side where the second walk segment is located on the third walk segment;The antenna feed pin is connected on the side of the fourth walk segment on the third walk segment, and the antenna feed ground pin is connected on the side of the fourth walk segment close to the antenna feed pin.The FPC antenna of the utility model is conducive to the portability of bluetooth adapter and the layout of other internal elements, conducive to the miniaturization and light and thin demand of bluetooth adapter, and reduces the overall element layout design difficulty.

Description

Technical Field

[0001] This utility model relates to the field of Bluetooth adapter technology, and in particular to an FPC antenna and a Bluetooth adapter. Background Technology

[0002] In today's era of rapid development in digital and wireless communication technologies, the demand for wireless connectivity between electronic devices is growing daily. Traditional devices such as older speakers, amplifiers, and computers without Bluetooth functionality are increasingly unable to meet users' expectations for convenient wireless connections because they cannot directly pair with modern Bluetooth devices. The plug-and-play Bluetooth adapter has emerged as a solution. It's a device that integrates power and Bluetooth, connecting directly to a power outlet or device interface. This design not only enables plug-and-play functionality but also greatly simplifies the wireless upgrade process for traditional devices. Users simply plug the plug-and-play Bluetooth adapter into a power outlet or device interface; no complex setup or installation is required to enable wireless audio reception capabilities for traditional speakers, amplifiers, and other devices. The FPC antenna is a key component of the Bluetooth adapter, enabling its wireless transmission function.

[0003] However, while ensuring high efficiency and stable performance, traditional FPC antenna design occupies a large space in small devices like Bluetooth adapters, limiting the portability of Bluetooth adapters and the layout of other internal components. This is not conducive to the miniaturization and thinning requirements of Bluetooth adapters, and the overall component layout design is also quite difficult. Utility Model Content

[0004] This utility model provides an FPC antenna and a Bluetooth adapter to solve the problem that traditional FPC antenna designs, while ensuring high efficiency and stability, occupy a large space in small devices like Bluetooth adapters, limiting the portability of Bluetooth adapters and the layout of other internal components, which is not conducive to the miniaturization and thinning of Bluetooth adapters, and also makes the overall component layout design difficult.

[0005] This utility model discloses an FPC antenna, including a flexible circuit board and antenna traces, wherein the antenna traces are disposed on the flexible circuit board; the antenna traces include an antenna body, an antenna feed pin, and an antenna ground pin.

[0006] The antenna body includes a first trace segment, a second trace segment, a third trace segment, and a fourth trace segment connected in sequence by bending. The first trace segment and the third trace segment extend on the same side of the second trace segment, and the fourth trace segment extends on the side of the third trace segment opposite to the side where the second trace segment is located. The antenna feed pin is connected to the side of the third trace segment where the fourth trace segment is located, and the antenna ground pin is connected to the side of the fourth trace segment near the antenna feed pin.

[0007] Optionally, the bending angle between the first and second wiring segments, the bending angle between the second and third wiring segments, and the bending angle between the third and fourth wiring segments are all 90°.

[0008] Optionally, the antenna feed pin is perpendicularly connected to the third trace segment, and the antenna ground pin is perpendicularly connected to the fourth trace segment.

[0009] Optionally, one end of the second trace is connected to one end of the first trace, the other end of the second trace is connected to one end of the third trace, the other end of the third trace is connected to one end of the fourth trace, and the other end of the fourth trace is connected to the antenna ground pin.

[0010] Optionally, the length of the first trace segment is 5.1±0.1mm, the length of the second trace segment is 6.3±0.1mm, the length of the third trace segment is 9.9±0.1mm, and the length of the fourth trace segment is 3.7±0.1mm.

[0011] Optionally, the length of the antenna feed pin is 3.7±0.1mm, and the length of the antenna ground pin is 3.0±0.1mm.

[0012] This utility model also discloses a Bluetooth adapter, including the aforementioned FPC antenna.

[0013] Optionally, the Bluetooth adapter further includes a main housing, a circuit board, and a rear housing; the circuit board is installed in the main housing, the rear housing covers one end of the main housing, and the FPC antenna is installed on the inner surface of the rear housing.

[0014] Optionally, an audio output module is mounted on the circuit board, the audio output module is inserted into the audio output hole of the rear cover, and the FPC antenna is positioned to avoid the audio output hole.

[0015] Optionally, the circuit board is provided with a first spring electrical connection pin and a second spring electrical connection pin corresponding to the antenna ground pin and the antenna power pin; the first spring electrical connection pin abuts against the antenna ground pin, and the second spring electrical connection pin abuts against the antenna power pin, so that the FPC antenna is electrically connected to the circuit board.

[0016] The beneficial effects of the FPC antenna provided in this utility model embodiment are as follows: the FPC antenna design of this utility model can ensure high efficiency and stable performance, and is suitable for small devices such as Bluetooth adapters. It occupies little space, which is conducive to the portability of Bluetooth adapters and the layout of other internal components. It is also conducive to the miniaturization and thinning of Bluetooth adapters and reduces the difficulty of overall component layout design. Attached Figure Description

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the FPC antenna according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the antenna wiring in an embodiment of this utility model;

[0020] Figure 3 This is an exploded view of the Bluetooth adapter according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the rear shell of an embodiment of this utility model.

[0022] The labels for the attached figures are as follows:

[0023] 1. FPC antenna; 11. Flexible circuit board; 12. Antenna trace; 121. Antenna body; 1211. First trace segment; 1212. Second trace segment; 1213. Third trace segment; 1214. Fourth trace segment; 122. Antenna feed pin; 123. Antenna ground pin; 2. Main housing; 3. Circuit board; 31. Audio output module; 32. First spring electrical connection pin; 33. Second spring electrical connection pin; 4. Rear housing; 41. Inner surface; 42. Audio output hole; 5. Pin. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] This utility model embodiment provides an FPC antenna 1, such as Figure 1 and Figure 2As shown, the FPC antenna 1 includes a flexible circuit board 11 and antenna traces 12, with the antenna traces 12 disposed on the flexible circuit board 11. The antenna traces 12 include an antenna body 121, an antenna feed pin 122, and an antenna ground pin 123. The antenna body 121 includes a first trace segment 1211, a second trace segment 1212, a third trace segment 1213, and a fourth trace segment 1214 connected in sequence by bending. The first trace segment 1211 and the third trace segment 1213 extend on the same side of the second trace segment 1212, and the fourth trace segment 1214 extends on the side of the third trace segment 1213 opposite to the side where the second trace segment 1212 is located. The antenna feed pin 122 is connected to the side of the third trace segment 1213 where the fourth trace segment 1214 is located, and the antenna ground pin 123 is connected to the side of the fourth trace segment 1214 near the antenna feed pin 122.

[0026] The FPC antenna 1 of this utility model uses a flexible printed circuit board 11 (FPC) as the carrier of the antenna trace 12, which makes the FPC antenna 1 easy to deform, bend and fold, and easier to attach to the installation position. It can better adapt to the compact space of small devices such as Bluetooth adapters and meet the needs of miniaturization and thinning of Bluetooth adapters. Meanwhile, the antenna body 121 includes a first trace segment 1211, a second trace segment 1212, a third trace segment 1213, and a fourth trace segment 1214 connected in sequence by bending. The first trace segment 1211 and the third trace segment 1213 extend on the same side of the second trace segment 1212, and the fourth trace segment 1214 extends on the side of the third trace segment 1213 opposite to the side where the second trace segment 1212 is located. The antenna feed pin 122 is connected to the side of the third trace segment 1213 where the fourth trace segment 1214 is located, and the antenna ground pin 123 is connected to the side of the fourth trace segment 1214 near the antenna feed pin 122. This makes the FPC antenna 1 have a zigzag structure, which allows for a longer trace length within a fixed area, enabling more effective use of three-dimensional space, enhancing signal reception and transmission capabilities, and ensuring its efficient and stable performance.

[0027] Therefore, the FPC antenna 1 design of this utility model can ensure high efficiency and stable performance, and is suitable for small devices such as Bluetooth adapters. It occupies little space, which is conducive to the portability of Bluetooth adapters and the layout of other internal components. It is also conducive to the miniaturization and thinning of Bluetooth adapters and reduces the difficulty of overall component layout design.

[0028] Specifically, the FPC antenna 1 of this invention can be applied to a plug-in Bluetooth adapter.

[0029] Specifically, the bending angles between the first trace segment 1211 and the second trace segment 1212, between the second trace segment 1212 and the third trace segment 1213, and between the third trace segment 1213 and the fourth trace segment 1214 are all 90°. The 90° bending angles allow for efficient layout of the antenna traces 12 within a limited space. Compared to other bending angles, such as acute or obtuse angles, 90° bends allow for a more regular arrangement of the antenna traces 12. While ensuring sufficient trace length, this results in a smaller area occupied by the entire FPC antenna 1, better meeting the requirements of small-space applications, such as the deployment of plug-in Bluetooth adapters.

[0030] Furthermore, the antenna feed pin 122 is perpendicularly connected to the third trace segment 1213, and the antenna ground pin 123 is perpendicularly connected to the fourth trace segment 1214. One end of the second trace segment 1212 is connected to one end of the first trace segment 1211, the other end of the second trace segment 1212 is connected to one end of the third trace segment 1213, the other end of the third trace segment 1213 is connected to one end of the fourth trace segment 1214, and the other end of the fourth trace segment 1214 is connected to the antenna ground pin 123.

[0031] Specifically, the first trace segment 1211, the second trace segment 1212, the third trace segment 1213, and the fourth trace segment 1214 are the core components of the FPC antenna 1, serving as the main body for signal radiation and reception. External input signals enter the antenna trace 12 through the antenna feed pin 122, where they are converted into electromagnetic waves and radiated outwards. The antenna ground pin 123 provides a return path for the signal, helping the antenna achieve a good electrical connection and effectively reducing interference, ensuring that the FPC antenna 1 operates stably in complex electromagnetic environments.

[0032] Specifically, the length L1 of the first trace segment 1211 is 5.1±0.1mm, the length L2 of the second trace segment 1212 is 6.3±0.1mm, the length L3 of the third trace segment 1213 is 9.9±0.1mm, and the length L4 of the fourth trace segment 1214 is 3.7±0.1mm. The specific shape and trace length of the FPC antenna 1 generate the 2.4GHz resonant frequency required for Bluetooth, which provides the primary area for signal transmission and reception. Further, the length L5 of the antenna feed pin 122 is 3.7±0.1mm, and the length L6 of the antenna ground pin 123 is 3.0±0.1mm.

[0033] Combination Figure 3 and Figure 4As shown, this utility model also discloses a Bluetooth adapter, including the FPC antenna 1 as described above. Specifically, the Bluetooth adapter further includes a main housing 2, a circuit board 3, and a rear housing 4; the circuit board 3 is installed in the main housing 2, the rear housing covers one end of the main housing 2, and the FPC antenna 1 is installed on the inner surface 41 of the rear housing 4. The FPC antenna 1 can be adhered to the inner surface 41 of the rear housing 4 with adhesive. The circuit board 3 has many metal components, which can seriously affect the radiation and reception of the antenna. This utility model places the FPC antenna 1 on the inner surface 41 of the rear housing 4, which is relatively far away from the metal components on the circuit board 3, so that the FPC antenna 1 is in a position with a better electromagnetic environment in the Bluetooth adapter, reducing the impact on the radiation and reception of the FPC antenna 1.

[0034] Specifically, an audio output module 31 is mounted on the circuit board 3. The audio output module 31 is inserted into the audio output hole 42 of the rear shell 4, and the FPC antenna 1 is positioned to avoid the audio output hole 42. The audio output module 31 has a large number of pins; if it is too close to the antenna, it will cause crosstalk, resulting in adverse effects on electromagnetic interference (EMI) and radio frequency interference (RFI). In this solution, the FPC antenna 1 is further positioned to avoid the audio output hole 42, keeping it relatively far away from the audio output module 31, thus reducing the adverse effects on EMI and RFI. Specifically, the audio output module 31 is a 3.5mm headphone jack, i.e., a TRS (Tip-Ring-Sleeve) or TRRS (Tip-Ring-Ring-Sleeve) connector (female), which is existing technology and will not be described in detail here.

[0035] The circuit board 3 is provided with a first spring-loaded electrical connection pin 32 and a second spring-loaded electrical connection pin 33 corresponding to the antenna ground pin 123 and the antenna power pin 122. The first spring-loaded electrical connection pin 32 abuts against the antenna ground pin 123, and the second spring-loaded electrical connection pin 33 abuts against the antenna power pin 122, so that the FPC antenna 1 is electrically connected to the circuit board 3. By setting the first spring-loaded electrical connection pin 32 and the second spring-loaded electrical connection pin 33, a direct electrical connection can be made with the antenna ground pin 123 and the antenna power pin 122, realizing the electrical connection between the FPC antenna 1 and the circuit board 3, which is simple, convenient, and reliable. Specifically, the first spring-loaded electrical connection pin 32 and the second spring-loaded electrical connection pin 33 are pogo pins.

[0036] In plug-in Bluetooth adapters, the electromagnetic environment is complex. Traditional onboard PCB antennas or ceramic antennas, being close to the power supply, are susceptible to interference, resulting in insufficient signal stability. This invention relates to a plug-in Bluetooth adapter. The main housing 2 has a pin 5 on the opposite end of the rear housing. Pin 5 is electrically connected to the circuit board 3 and is used to directly plug into a household power strip with a voltage of, for example, 220V. The plug-in Bluetooth adapter uses the circuit board 3 to step down the 220V voltage to the operating voltage, for example, 5V. Because of the need for voltage reduction, the circuit board 3 of the plug-in Bluetooth adapter has many voltage-reducing components, which seriously affects the antenna's radiation and reception. Placing the FPC antenna 1 on the inner surface 41 of the rear housing 4 better ensures the radiation and reception functions of the FPC antenna 1.

[0037] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. An FPC antenna, characterized in that, The device includes a flexible circuit board and antenna traces, wherein the antenna traces are disposed on the flexible circuit board; the antenna traces include an antenna body, an antenna feed pin, and an antenna ground pin. The antenna body includes a first trace segment, a second trace segment, a third trace segment, and a fourth trace segment connected in sequence by bending. The first trace segment and the third trace segment extend on the same side of the second trace segment, and the fourth trace segment extends on the side of the third trace segment opposite to the side where the second trace segment is located. The antenna feed pin is connected to the side of the third trace segment where the fourth trace segment is located, and the antenna ground pin is connected to the side of the fourth trace segment near the antenna feed pin.

2. The FPC antenna according to claim 1, characterized in that, The bending angle between the first and second wiring segments, the bending angle between the second and third wiring segments, and the bending angle between the third and fourth wiring segments are all 90°.

3. The FPC antenna according to claim 2, characterized in that, The antenna feed pin is perpendicularly connected to the third trace segment, and the antenna ground pin is perpendicularly connected to the fourth trace segment.

4. The FPC antenna according to claim 3, characterized in that, One end of the second trace is connected to one end of the first trace, the other end of the second trace is connected to one end of the third trace, the other end of the third trace is connected to one end of the fourth trace, and the other end of the fourth trace is connected to the antenna ground pin.

5. The FPC antenna according to claim 4, characterized in that, The length of the first trace segment is 5.1±0.1mm, the length of the second trace segment is 6.3±0.1mm, the length of the third trace segment is 9.9±0.1mm, and the length of the fourth trace segment is 3.7±0.1mm.

6. The FPC antenna according to claim 5, characterized in that, The length of the antenna feed pin is 3.7±0.1mm, and the length of the antenna ground pin is 3.0±0.1mm.

7. A Bluetooth adapter, characterized in that, Includes the FPC antenna as described in any one of claims 1 to 6.

8. The Bluetooth adapter according to claim 7, characterized in that, The Bluetooth adapter also includes a main housing, a circuit board, and a rear housing; the circuit board is installed in the main housing, the rear housing covers one end of the main housing, and the FPC antenna is installed on the inner surface of the rear housing.

9. The Bluetooth adapter according to claim 8, characterized in that, An audio output module is mounted on the circuit board and inserted into the audio output hole of the rear cover. The FPC antenna is positioned to avoid the audio output hole.

10. The Bluetooth adapter according to claim 8, characterized in that, The circuit board is provided with a first spring electrical connection pin and a second spring electrical connection pin corresponding to the antenna ground pin and the antenna power pin. The first spring-loaded electrical connector abuts against the antenna ground pin, and the second spring-loaded electrical connector abuts against the antenna power pin, so that the FPC antenna is electrically connected to the circuit board.

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