Wireless earphone, charging box and earphone assembly

Abstract

The embodiment of the invention provides a wireless earphone, a charging box and an earphone assembly, which are used for solving the problem of insufficient performance of an existing earphone antenna. The wireless earphone comprises an ear muff part and an ear handle part, wherein the ear handle part comprises a connecting part connected with the ear muff part and an ear handle rod connected with the connecting part; the wireless earphone comprises a first circuit board and a pickup channel, the first circuit board is arranged in the ear handle rod, a first feeding point is arranged on the first circuit board, the pickup channel comprises a conductive material, and the pickup channel is electrically connected with the first feeding point.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication equipment, and in particular to a wireless earphone, a charging box and an earphone assembly. BACKGROUND

[0002] In recent years, the earphone market has developed rapidly, especially the wireless earphone market. Among many wireless earphone products, true wireless stereo (TWS) earphones can realize stereo playback of left and right channels, provide high-quality playback sound quality for wireless earphone users, and are deeply loved by users.

[0003] For TWS earphone products, multi-band operation and smooth connection without lag have always been the goal of product design. However, the internal space of TWS earphones is limited, and how to effectively utilize the internal space of TWS earphones to improve the antenna performance of TWS earphones has become a problem to be solved. SUMMARY

[0004] The embodiments of the present application provide a wireless earphone, a charging box and an earphone assembly to improve the problem of insufficient antenna performance of the existing earphone.

[0005] In order to achieve the above-mentioned purpose, the scheme adopted by the embodiments of the present application is as follows:

[0006] In a first aspect, the embodiments of the present application provide a wireless earphone, which includes an ear cover part and an ear stem part, wherein the ear stem part includes a connecting part connected with the ear cover part and an ear stem rod connected with the connecting part; the wireless earphone includes a first circuit board and a sound pickup channel, the first circuit board is arranged in the ear stem rod, the first circuit board is provided with a first feeding point, at least part of the sound pickup channel is conductive, and the sound pickup channel is electrically connected with the first feeding point.

[0007] The wireless earphone provided by the embodiments of the present application multiplexes the sound pickup channel with good radiation environment as a conductive antenna radiator, for example, which can be called a first antenna. The sound pickup channel can be used as an additional antenna radiator without occupying the existing antenna layout space, for example, in the case of existing antennas. On the one hand, the existing antenna layout space is not lost, and on the other hand, a new antenna is added. Therefore, the antenna efficiency of the wireless earphone can be improved, and the communication performance of the wireless earphone can be improved. Optionally, at least part of the sound pickup channel can include a conductive material, wherein the conductive material can be at least one of metal, graphene and other conductive materials.

[0008] In one possible implementation, the wireless earphone also includes a microphone and a pickup hole. The microphone is located on a first circuit board within the connector, the pickup hole is located at the top of the ear cup away from the wearer's ear, and the pickup channel is located at the top of the ear stem for transmitting ambient noise collected from the pickup hole to the microphone. The pickup channel is located away from the head of the earphone wearer, so it is not obstructed by the user's auricle and face, resulting in better radiation space and higher radiation efficiency.

[0009] In one possible implementation, the pickup channel includes a feed point located at the end of the pickup channel away from the earpiece. The feed point is electrically connected to a first feed point. A notch is provided on the first circuit board. The projection of the feed point of the pickup channel on the first circuit board along the thickness direction is located within the notch. This allows the feed point of the pickup channel to be disconnected from ground, ensuring the radiation performance of the pickup channel as an antenna radiator. On the other hand, it also ensures the clearance of the pickup channel as an antenna radiator, improving radiation efficiency and increasing antenna bandwidth.

[0010] In one possible implementation, a grounding point is provided on the first circuit board, and the pickup channel is electrically connected to the grounding point. Grounding the pickup channel can achieve impedance tuning and improve the radiation efficiency of the antenna.

[0011] In one possible implementation, the wireless earphone further includes a dustproof mesh covering the end of the pickup channel away from the microphone. The dustproof mesh is conductive and electrically connected to the pickup channel. The metal dustproof mesh is electrically connected to the pickup channel, which is reused as an antenna, effectively expanding the antenna size and improving its radiation efficiency. Optionally, at least a portion of the dustproof mesh may include a conductive material, wherein the conductive material can be at least one of a metal, graphene, or other conductive materials.

[0012] In one possible implementation, the length of the pickup channel is λ1 is the wavelength of the 5GHz band signal. For example, the 5GHz band can include signals from 5.2GHz to 6GHz. Thus, the pickup channel, as an antenna radiator, can be used to transmit and receive signals in the 5GHz band. Since the 5GHz band has better anti-interference performance than the 2.4GHz band, reusing the pickup channel as an antenna in the 5GHz band can improve the performance of wireless headphones and enhance the user experience.

[0013] In one possible implementation, the wireless earphone also includes an antenna bracket and a second antenna. A second feed point is also provided on the first circuit board. The antenna bracket is located on the side of the first circuit board away from the wearer's ear, and the second antenna is located on the surface of the antenna bracket on the side away from the wearer's ear. The second antenna is electrically connected to the second feed point. Thus, the wireless earphone can include an antenna formed by multiplexing a conductive pickup channel and a second antenna located on the antenna bracket, which can realize a dual-frequency, dual-antenna wireless earphone, expand the operating frequency range of the wireless earphone, and broaden the application scenarios of the wireless earphone.

[0014] In one possible implementation, the length of the second antenna is... λ2 is the wavelength of the 2.4GHz band signal, so the second antenna can transmit and receive 2.4GHz band signals. For example, the 2.4GHz band can include signals from 2.4GHz to 2.48GHz. In this way, the wireless headphones can work in the 2.4GHz and 5GHz bands. Furthermore, the 5GHz band antenna uses the multiplexed pickup channel as the antenna radiator, which will not squeeze the deployment space of the 2.4GHz band antenna, nor will it reduce the size or aperture of the 2.4GHz antenna, thus ensuring the efficiency of the 2.4GHz antenna.

[0015] In one possible implementation, the pickup channel and the second antenna are located on opposite sides of the first circuit board, meaning that the 2.4GHz band antenna and the 5GHz band antenna are respectively located on different sides of the first circuit board, which can avoid the 2.4GHz band antenna and the 5GHz antenna interfering with each other and affecting antenna performance.

[0016] In one possible implementation, the wireless earphone includes a main control chip and an RF front-end circuit, with the main control chip and the RF front-end circuit mounted on a first circuit board; the main control chip includes a first transceiver port and a second transceiver port, the first transceiver port being coupled to a first feed point through the RF front-end circuit, and the second transceiver port being coupled to a second feed point through the RF front-end circuit.

[0017] In one possible implementation, the wireless earphone further includes a third antenna, and a third feed point is also provided on the first circuit board. The third antenna is disposed on the surface of the antenna bracket away from the wearer's ear, and is connected to the third feed point. The third antenna is... λ1 is the wavelength of the 5GHz band signal. The third antenna can also be used to transmit and receive 5GHz band signals. Furthermore, the third antenna is located in a different position than the first antenna formed by the multiplexed pickup channel, and their radiation patterns are different. Depending on the usage scenario, you can switch between using the 5GHz band antenna to expand the application scenarios of wireless headphones.

[0018] In one possible implementation, the second antenna is positioned in a first region on the surface of the antenna support away from the wearer's ear, and the third antenna is positioned in a second region on the same surface. The first region is close to the earcup, and the second region is far from it. Since the first antenna, formed by the multiplexed pickup channel, is located at the top of the ear stem, while the third antenna is located at the bottom of the ear stem (i.e., the bottom of the ear stem), the ground current distribution at these two locations differs significantly. This allows the third antenna and the first antenna, formed by the multiplexed pickup channel, to form two different radiation fields. The two 5GHz band antennas have different minimum gain angles in the horizontal plane when the user is wearing the device. For example, the minimum gain angle of the first antenna in the horizontal plane when the user is wearing the device is 90°, while that of the third antenna is 120°. Therefore, the device can switch to the third antenna at 90° and to the first antenna at 120°. The two 5GHz band antennas can complement each other, thereby increasing the minimum gain of the horizontal plane when the user is wearing the device and extending the operating distance of the wireless headphones in the 5GHz band.

[0019] In one possible implementation, the wireless earphone includes a main control chip, an RF front-end circuit, and a tuning switch, which are mounted on a first circuit board. The main control chip includes a first transceiver port and a second transceiver port. The first transceiver port is coupled to a first feed point through the RF front-end circuit, and the second transceiver port is coupled to a second feed point and a third feed point through the RF front-end circuit and the tuning switch.

[0020] Secondly, embodiments of this application also provide a charging case, which includes a charging case shell and a top cover. The top cover is rotatably connected to the charging case shell. The charging case shell includes a receiving groove for receiving wireless earphones as provided in any implementation of the first aspect.

[0021] Thirdly, embodiments of this application also provide an earphone assembly, which includes a charging case and wireless earphones as provided in the first aspect and any implementation thereof. The charging case includes a charging case shell and a top cover, the top cover being rotatably connected to the charging case shell. The charging case shell includes a receiving groove for receiving the wireless earphones. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a general-purpose headphone;

[0023] Figure 2 This is a schematic diagram of a general headphone structure;

[0024] Figure 3 This is a diagram illustrating the state of the headphones being worn.

[0025] Figure 4 This is a schematic diagram of an earphone antenna;

[0026] Figure 5 This is a schematic diagram of another type of headphone antenna;

[0027] Figure 6 This is a schematic diagram of the structure of a wireless earphone provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the structure of a wireless earphone provided in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of the structure of a wireless earphone provided in an embodiment of this application;

[0030] Figure 9 A schematic diagram of the pickup component provided in an embodiment of this application;

[0031] Figure 10 This is a schematic diagram of another wireless earphone provided in an embodiment of this application;

[0032] Figure 11 This is a partial structural schematic diagram of another wireless earphone provided in an embodiment of this application;

[0033] Figure 12 A schematic diagram of the radio frequency link of another wireless earphone provided in an embodiment of this application;

[0034] Figure 13 This is a schematic diagram of another wireless earphone provided in an embodiment of this application;

[0035] Figure 14 This is a partial structural schematic diagram of another wireless earphone provided in an embodiment of this application;

[0036] Figure 15 A schematic diagram of the radio frequency link of another wireless earphone provided in an embodiment of this application;

[0037] Figure 16 This is a schematic diagram of the minimum horizontal gain of a portion of the antennas provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0039] Unless otherwise defined, all technical terms used herein have the same meaning as commonly known to those skilled in the art. In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or multiple. Furthermore, in the embodiments of this application, the words "first," "second," etc., do not limit the quantity or order.

[0040] Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0041] It should be noted that, in this application, the terms "exemplary" or "for example" are used to indicate that something is being described as an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0042] With the development of mobile terminal technology, the headphone market has also grown rapidly. Especially after mainstream electronic products have gradually eliminated the 3.5mm audio jack, the application of wireless headphones has become more and more widespread. Among them, true wireless stereo (TWS) headphones can achieve stereo playback of the left and right channels. While being portable and easy to wear, they can also provide users with good playback sound quality, which is favored by a large number of headphone users. For ease of introduction, true wireless stereo headphones will be referred to as wireless headphones below.

[0043] Reference Figure 1 As shown, Figure 1 This is a structural schematic diagram of a general-purpose wireless earphone 100 (the following explanation uses a three-dimensional coordinate system consisting of XYZ to illustrate the positional relationships of the structures described in the various structural schematic diagrams, for example, in...). Figure 1In the diagram, the Y direction is longitudinal, the X direction is transverse, and the Z direction is perpendicular to the XY plane. Typically, the wireless earphone 100 has an ear cup portion 1 and an ear stem portion 2. The ear stem portion 2 includes a connecting portion 21 connected to the ear cup portion 1 and an ear stem rod 22 connected to the connecting portion 21. The connecting portion 21 and the ear stem rod 22 are arranged sequentially in the longitudinal direction (Y direction). The ear cup portion 1 is used to partially embed into the user's ear. When the user wears the wireless earphone 100, the ear cup portion 1 partially embeds into the user's ear, and the ear stem portion 2 is located outside the user's ear and contacts the user's ear.

[0044] refer to Figure 1 and Figure 2 As shown, where Figure 2 yes Figure 1The diagram shows a partially exploded view of the wireless earphone 100. The wireless earphone 100 includes a housing 10. The housing 10 is used to house other functional components of the wireless earphone 100, for fixing and protecting these components. The housing 10 includes a main housing 101, a bottom housing 102, and a side housing 103. The main housing 101 is partially located in the ear stem portion 2 of the wireless earphone 100 and partially located in the ear cup portion 1 of the wireless earphone 100. The main housing 101 has a first opening 1011 at the end of the ear stem 22 away from the connecting portion 21 and a second opening 1012 at the ear cup portion 1 of the wireless earphone 100. Other components of the wireless earphone 100 can be inserted into the main housing 101 through the first opening 1011 or the second opening 1012. For example, the battery (BAT) 20 and the speaker assembly (SPK) 30 can be installed inside the ear cup portion 1 of the main housing 101 through the second opening 1012. Of course, other components that need to be housed inside the main housing 101 can also be included, such as one or more printed circuit boards (PCBs) 40, flexible circuit boards 50, antennas 60, and chips on the PCBs 70 (e.g., processors, audio decoders, RF circuits, charging circuits, touch circuits, etc.), microphone modules, etc. The bottom housing 102 is located at the end of the ear stem 22 of the wireless earphone 100 away from the connecting portion 21 and is fixedly connected to the main housing 101. The bottom housing 102 is installed in the first opening 1011. The side housing 103 is located in the ear cup portion 1 of the wireless earphone 100 and is fixedly connected to the main housing 101. The side housing 103 is installed in the second opening 1012. The connection between the bottom housing 102 and the main housing 101 is a detachable connection (e.g., a snap-fit ​​connection, a threaded connection, etc.) to facilitate subsequent repair or maintenance of the wireless earphone 100. In other embodiments, the connection between the bottom housing 102 and the main housing 101 can also be a non-detachable connection (e.g., glued) to reduce the risk of the bottom housing 102 accidentally falling off, thus increasing the reliability of the wireless earphone 100. The connection between the side housing 103 and the main housing 101 is a detachable connection (e.g., a snap-fit ​​connection, a threaded connection, etc.) to facilitate subsequent repair or maintenance of the wireless earphone 100. In other embodiments, the connection between the side housing 103 and the main housing 101 can also be a non-detachable connection (e.g., glued) to reduce the risk of the side housing 103 accidentally falling off, thus increasing the reliability of the wireless earphone 100. The side housing 103 is provided with one or more sound outlet holes 1031, allowing sound inside the housing 10 to be transmitted to the outside of the housing 10 through the sound outlet holes 1031. This application does not impose strict limitations on the shape, position, number, etc. of the sound hole 1031.

[0045] The above describes a typical structure of a wireless earphone 100. Of course, the structure of the wireless earphone 100 described above is not the only structure. In some embodiments, those skilled in the art can make other structural designs, which will not be described in detail in this implementation.

[0046] As a key component for headphones to achieve their communication functions, antennas are usually placed inside the ear stem in headphones to ensure their radiation performance. Headphone antennas can be classified according to the stacking method of the whole device, such as on-board antennas, ceramic antennas, flexible printed circuit (FPC) antennas, and laser-direct-structuring (LDS) bracket antennas.

[0047] See Figure 3 When headphones are worn, there are two optimal radiation environments, namely... Figure 3 The top area of ​​the earlobe shown in Figure A and as shown in Figure A Figure 3 Figure B shows the top area of ​​the ear stem. In this embodiment, "top," "bottom," etc., refer to the user's wearing posture. For example, in the wearing posture, the area facing the user's head is the top, and the area facing the user's feet is the bottom. In the wearing posture, the top area of ​​the earcup is open in the radiation environment and is not obstructed by the user's ear or face. However, since current headphones are usually active noise-canceling headphones, they need to use a pickup component to collect ambient noise signals. This pickup component is usually located in the top area of ​​the earcup to achieve optimal ambient noise signal collection. Therefore, the top of the earcup is compactly stacked, with no additional space for antenna placement. The top area of ​​the ear stem is furthest from the face in the wearing posture, resulting in minimal absorption of antenna efficiency by the human body. Therefore, the antenna is usually placed in the upper half of the ear stem to ensure radiation efficiency.

[0048] Figure 4 A schematic diagram of an antenna for an earphone is shown. To save space, the earphone can use an LDS antenna. An LDS antenna is an antenna that is laser-etched onto an antenna support. For example, the antenna support can be set along the extension direction of the ear stem, thereby forming an antenna laid along the extension direction of the ear stem. An antenna feed point can be set on the printed circuit board. The antenna can be electrically connected to the antenna feed point on the printed circuit board, thereby realizing the antenna's signal radiation and reception functions.

[0049] For wireless earphones, high-definition lossless sound quality and a smooth, lag-free user experience have always been the goals of product design. Current wireless earphones operate in the 2.4GHz band, which ranges from 2.4GHz to 2.48GHz. However, the 2.4GHz band experiences significant interference noise in areas such as airports, train stations, and high-speed rail stations, failing to meet the demodulation threshold for high-definition music. Furthermore, in environments with strong interference, the connection between the earphones and electronic devices such as mobile phones or tablets frequently experiences stuttering and disconnections, limiting the user experience. The 5GHz band, on the other hand, offers a wider spectrum, ranging from 5.2GHz to 6GHz. Real-world testing shows that even in highly interference environments like high-speed rail stations, the 5GHz band still has clean spectrum available, with noise levels significantly lower than the 2.4GHz band, effectively resolving connection issues. Therefore, current wireless earphones also incorporate the 5GHz operating band, enabling dual-band operation. Different frequency bands have different wavelengths, requiring different antennas to transmit and receive signals. For wireless headphones operating in the 2.4GHz and 5GHz bands, antennas for both the 2.4GHz and 5GHz bands need to be set up simultaneously.

[0050] Figure 5 A schematic diagram of another headphone antenna is shown. This headphone includes a first antenna and a second antenna. The first antenna can transmit and receive signals in the 2.4GHz band, and the second antenna can transmit and receive signals in the 5GHz band. The first and second antennas can be co-radiator antennas, meaning they share the same radiator, the same feed point, and the same RF channel, but can transmit and receive signals in two different frequency bands. Adding a 5GHz antenna can improve the headphone's performance, but due to space limitations, it reduces the space available for the 2.4GHz antenna. With the trend towards miniaturization, product iterations have reduced the size of the plastic bracket used to mount the antenna. Combined with the need for an additional 5GHz antenna, the size of the 2.4GHz antenna is further compressed, leading to decreased efficiency. For example, with only a 2.4GHz antenna, the trace width of the 2.4GHz antenna can reach 6.75mm. However, with the addition of a dual-band antenna, the trace width of the 2.4GHz antenna is reduced to 3.4mm, and the aperture is reduced by about 3.35mm. The antenna width is compressed, which leads to a deterioration in antenna efficiency. For example, the radiation efficiency of the 2.4GHz antenna in a wireless headset with a single 2.4GHz antenna can reach -10.8dB, while the radiation efficiency of the 2.4GHz antenna in a wireless headset with a dual-band antenna deteriorates to -12.4dB, a decrease of about 1.6dB.

[0051] Therefore, adding a new antenna reduces the space available for the existing antenna in the wireless earphone, resulting in a reduction in the size and efficiency of the original antenna. To address these issues, this application provides a wireless earphone that reuses a conductive pickup channel (e.g., a metal pickup channel) at the top of the ear stem as an antenna radiator for transmitting and receiving signals in the 5GHz band. This not only expands the operating frequency range of the wireless earphone but also reuses the existing structure, avoiding a reduction in the space available for the original 2.4GHz antenna, thus meeting antenna radiation performance specifications and improving antenna efficiency.

[0052] See Figure 6 , Figure 6 Figures A and B in the diagram are schematic diagrams of the wireless earphone 400 from two different perspectives. The wireless earphone 400 includes an ear cup portion and an ear stem portion. The ear cup portion is the part of the wireless earphone 400 worn in the human ear, and the ear stem portion is the part of the wireless earphone 400 that is exposed outside the human ear when worn. In this embodiment, the ear stem portion may further include a connecting portion and an ear stem rod. The ear stem rod may be a portion of the ear stem portion arranged along the Y direction. Correspondingly, the connecting portion may be a portion of the ear stem portion that connects the ear stem rod and the ear cup portion.

[0053] For example, such as Figure 7 As shown, the wireless earphone 400 may include a housing 410, which includes a main housing 411, a side housing 412, and a side cover 413. The main housing 411 includes a first opening 4111 facing the wearer's ear and a second opening 4112 away from the wearer's ear. The side housing 412 can be installed in the first opening 4111, and the side cover 413 can be installed in the second opening 4112. The housing 410 of the wireless earphone 400 may also have other types of structures, which are not limited in this embodiment.

[0054] The wireless earphone 400 provided in this embodiment includes a first circuit board 440, a microphone 471, a pickup channel 472, and a pickup hole 4113. The first circuit board 440 is disposed in the internal space formed by the housing 410 of the ear stem. The microphone 471 is disposed on the first circuit board 440 located within the connecting portion. The first circuit board 440 can be a printed circuit board (PCB) and / or a flexible printed circuit board (FPC). For example, the first circuit board 440 can be implemented by combining a PCB and an FPC, or the first circuit board 440 can be implemented by a separate FPC or PCB. In this example, the first circuit board 440 is implemented in the form of a PCB. In this embodiment, the first circuit board 440 is disposed in the ear stem, and the shape of the first circuit board 440 can also match the internal space of the ear stem, for example, it can be elongated.

[0055] In addition to the microphone 471, other functional components may also be provided on the first circuit board 440, such as the main control chip 441, radio frequency front-end circuit (not shown), etc., which are not limited in this application embodiment. It should be noted that, for the convenience of introducing the solution of the application embodiment, some structural components of the wireless earphone not involved in the application embodiment are not shown in the accompanying drawings provided in the application embodiment.

[0056] The pickup hole 4113 is located at the top of the earpiece away from the wearer's ear, and the pickup channel 472 is used to transmit the ambient noise collected from the pickup hole 4113 to the pickup microphone 471.

[0057] For example, the pickup channel 472 may include a metallic material, combined with Figure 8 and Figure 9 The pickup channel 472 extends from the top of the ear stem to the ear canal. The length of the pickup channel 472 is λ1 / 5 to λ1 / 3, where λ1 is the wavelength of the 5GHz band signal to satisfy the natural resonant wavelength of the 5GHz band. For example, the 5GHz band can include signals from 5.2GHz to 6GHz. See [reference needed]. Figure 9 , Figure 9 Figures A and B illustrate the structural diagrams of the pickup channel from two different perspectives. As an example, the pickup channel 472 is approximately 7 mm long and 2.7 mm wide, conforming to the natural resonant wavelength of a 5 GHz antenna. It can be used to transmit and receive signals in the 5 GHz band, which offers stronger anti-interference capabilities. Multiplexing the pickup channel 472 as a 5 GHz band antenna can improve the communication and anti-interference capabilities of the wireless headset 400. Furthermore, the radiation environment at the top of the ear stem is open, meeting the antenna's radiation space requirements.

[0058] Continue reading Figure 9 The pickup channel 472 may include a metallic material and includes a feed point 4721 located at the end of the pickup channel 472 away from the earpiece. A first feed point 444 is provided on the first circuit board 440. The feed point 4721 of the pickup channel 472 is electrically connected to the first feed point 444, thereby enabling the pickup channel 472 to be used as an antenna radiator for transmitting and receiving wireless signals. To distinguish it from other antennas, this embodiment refers to the antenna formed by multiplexing the pickup channel 472 as the first antenna.

[0059] The wireless earphone provided in this application reuses a conductive pickup channel (e.g., a metal pickup channel) with a good radiation environment as an antenna radiator. For example, it can be called a first antenna. The first antenna is formed by reusing the existing structure of the wireless earphone, that is, there is no need to open up special space for the first antenna. Reusing the pickup channel as an antenna can expand the antenna without occupying the existing antenna layout space. On the one hand, it does not lose the layout space of the existing antenna, and on the other hand, it adds a new antenna. Therefore, it can improve the antenna efficiency of the wireless earphone and improve the communication performance of the wireless earphone.

[0060] Furthermore, the pickup channel of the wireless earphone provided in this application embodiment is located at the top of the ear stem, which connects the pickup hole located at the top of the ear cup and the pickup microphone located on the first circuit board. The pickup channel is positioned far away from the user's ear and face, providing a good radiation environment and ensuring the radiation capability of the pickup channel as an antenna.

[0061] Continue reading Figure 9 To ensure the radiation performance of the pickup channel 472 as an antenna radiator, a notch 447 is provided on the first circuit board 440. The projection of the feed point 4721 of the pickup channel 472 along the thickness direction of the first circuit board 440 onto the first circuit board 440 is located within the notch 447. This disconnects the feed point 4721 of the pickup channel 472 from the ground, ensuring the radiation performance of the pickup channel 472 as an antenna radiator. On the other hand, it also ensures the clearance of the pickup channel 472 as an antenna radiator, improving radiation efficiency and increasing antenna bandwidth.

[0062] In one possible implementation, a grounding point is provided on the first circuit board 440, and the pickup channel 472 is electrically connected to the grounding point on the first circuit board 440. Grounding the pickup channel 472 can achieve impedance tuning and improve the radiation efficiency of the antenna.

[0063] In one possible implementation, such as Figures 7-9 As shown, the wireless earphone 400 also includes a dustproof mesh 473 that covers the end of the pickup channel 472 away from the pickup microphone 471. The dustproof mesh 473 may include a metal material and is electrically connected to the pickup channel 472.

[0064] For example, the dustproof mesh 473 is approximately 5.5mm x 4mm in size. Electrically connecting the dustproof mesh 473 to the pickup channel 472 is equivalent to expanding the antenna size, which can improve antenna performance and radiation efficiency.

[0065] In some possible implementations, if the pickup channel 472 is made of plastic and the dustproof mesh 473 is made of metal, the dustproof mesh 473 can also be electrically connected to the first feed point 444 on the first circuit board 440 via a metal connecting wire or other means, and the pickup channel 472 can be reused as the first antenna.

[0066] The antenna scheme provided in this application reuses a conductive pickup channel as a 5GHz band antenna. The pickup channel can include conductive materials such as metal or graphene. For example, in one possible implementation, the pickup channel can be made of a metal material, which can enhance the structure of the wireless earphone and can be reused as an antenna. In another possible implementation, to reduce the weight of the wireless earphone and achieve portability, the pickup channel can also be made of a non-metallic material, such as plastic. In this case, a conductive layer can be formed on the surface of the pickup channel, such as an electroplated metal film or a graphene coating, to form a conductive pickup channel. The conductive pickup channel can be reused as an antenna without significantly increasing the weight of the wireless earphone. Furthermore, when forming the conductive layer on the surface of the pickup channel, a specific pattern can be formed. For example, one or more gaps can be formed between the conductive layers at the top and bottom of the pickup channel to form capacitive coupling, thereby expanding the bandwidth of the antenna formed by reusing the pickup channel and improving the antenna performance.

[0067] As mentioned in the foregoing embodiments, reusing the pickup channel as a 5GHz antenna will not occupy the space of the existing antenna. For example, in one possible implementation, the wireless earphone also includes an antenna bracket and a second antenna. Thus, the wireless earphone can include an antenna formed by reusing the conductive pickup channel (called the first antenna) and a second antenna set on the antenna bracket, which can realize a dual-frequency, dual-antenna wireless earphone, expand the operating frequency range of the wireless earphone, and broaden the application scenarios of the wireless earphone.

[0068] Please see Figure 10 , Figure 10 This paper illustrates a structural block diagram of another wireless earphone 400 provided in an embodiment of this application. The wireless earphone 400 may include a housing 410, and disposed in the internal space formed by the housing 410: a battery 420, a speaker assembly 430, a first circuit board 440, a second circuit board 450, a main control chip 441, a radio frequency front-end circuit (not shown), an antenna bracket (not shown), a second antenna 461, and a sound pickup assembly, etc., wherein the sound pickup assembly includes a sound pickup microphone 471 and a sound pickup channel 472. The wireless earphone 400 may also include other components, which are not limited in this embodiment of the application.

[0069] The earcup may include components such as a battery 420, a speaker assembly 430, and a second circuit board 450. The speaker assembly 430, battery 420, and second circuit board 450 are connected. The second circuit board 450 can be a flexible circuit board, facilitating compact wiring layout within the irregular space of the earcup. The second circuit board 450 can extend to the ear stem for electrical connection with a first circuit board 440 located within the ear stem. The speaker assembly 430 amplifies the audio signal processed by the main control chip 441 and delivers it to the ear. The battery 420 provides overall power to the wireless earphone 400.

[0070] The first circuit board 440, antenna bracket, second antenna 461, etc. are located on the ear stem, while the main control chip 441, microphone 471, etc. are located on the first circuit board 440.

[0071] Please combine Figure 10 and Figure 11 , Figure 11 Figures A and B show partial structural diagrams of the wireless earphone 400. The antenna bracket 460 can be located between the housing 410 of the ear stem and the first circuit board 440. The second antenna 461 can be a ceramic antenna, a steel sheet antenna, a laser direct structuring (LDS) antenna, etc. The second antenna 461 can be mounted or disposed on the antenna bracket 460. For example, in this embodiment of the application, the second antenna 461 can be an LDS antenna.

[0072] The shape of the antenna bracket 460 can match the projection of the ear stem on the XY plane, thereby allowing the second antenna 461 mounted on the antenna bracket 460 to obtain the maximum area.

[0073] In this embodiment of the application, taking the first circuit board 440 as an example of implementing its function in the form of a PCB, the first circuit board 440 is disposed in the ear stem portion, and the shape of the first circuit board 440 can also match the internal space of the ear stem portion, for example, it is a long strip.

[0074] The main control chip 441 and the radio frequency front-end circuit (not shown) are disposed on the first circuit board 440. In this embodiment, the main control chip 441 can process signals of both the 2.4 GHz band and the 5 GHz band, so that the wireless earphone 400 needs to be equipped with antennas of two bands.

[0075] The first circuit board has a first power supply point and a second power supply point, combined with Figure 12 , Figure 12A schematic diagram of the radio frequency architecture of a wireless earphone provided in an embodiment of this application is shown. The main control chip 441 includes a first signal terminal 4411 and a second signal terminal 4412. The first signal terminal 4411 is connected to a first feed point 444 through a radio frequency front-end circuit 442, and the second signal terminal 4412 is electrically connected to the second feed point 445 through the radio frequency front-end circuit 442. The pickup channel 472 is electrically connected to the first feed point 444 and serves as a first antenna. The second antenna 461 is electrically connected to the second feed point 445. The first signal terminal 4411 of the main control chip 441 can be used to transmit and receive signals in a first frequency band, and the second signal terminal 4412 can be used to transmit and receive signals in a second frequency band. In this embodiment of the application, the first frequency band can be a 5GHz band, and the second frequency band can be a 2.4GHz band.

[0076] In this embodiment, the second antenna 461 is electrically connected to the second feed point 445, thereby enabling the transmission and reception of signals in the second frequency band via the second antenna 461. The size of the second antenna 461 is approximately λ2 / 5 to λ2 / 3, where λ2 is the wavelength of the 2.4 GHz band signal, to meet the antenna requirements for transmitting and receiving 2.4 GHz band signals. For example, the 2.4 GHz band range includes signals from 2.4 GHz to 2.48 GHz.

[0077] The structure of the microphone pickup assembly has been described in the previous embodiments. In this embodiment, the conductive pickup channel 472 is reused as a 5GHz band antenna, referred to as the first antenna. This allows for the addition of a new antenna to expand antenna performance. Additionally, a 2.4GHz antenna, referred to as the second antenna 461, is also provided. Reusing the pickup channel 472 as a 5GHz band antenna does not affect the deployment space of the 2.4GHz band antenna. The reuse of the pickup channel 472 as a 5GHz antenna has been described in detail in the previous embodiments and will not be repeated here. In this embodiment, since two antennas of different frequency bands, the first antenna and the second antenna 461, are provided, to avoid interference between them, the first antenna and the second antenna 461 formed by the reused conductive pickup channel 472 are located on different sides of the first circuit board 440, for example... Figure 10 and Figure 11 The antenna bracket 460 is disposed on the side of the first circuit board 440 away from the user's face, the second antenna 461 is disposed on the surface of the antenna bracket 460 on the side away from the user's face, and the pickup channel 472 is disposed on the side of the first circuit board 440 facing the user's face. This can avoid interference between the two antennas of different frequency bands.

[0078] The wireless earphones provided in this application embodiment employ a split dual-band Bluetooth antenna. The 2.4GHz antenna uses LDS technology to laser-etch wiring onto the antenna bracket surface. The 5GHz antenna reuses conductive structural components of the pickup assembly, such as the pickup channel and dustproof mesh, to improve the antenna's radiation performance. The separate setup of the 2.4GHz and 5GHz antennas enables dual-band coverage of both the 2.4GHz and 5GHz bands. The 2.4GHz antenna also improves the minimum gain on the opposite side of the head in the horizontal plane, ensuring the maximum connection distance of the wireless earphones in scenarios involving wall penetration or long-distance communication. In outdoor environments… The 5GHz spectrum has lower noise, and the 5GHz antenna can meet the high-definition communication between wireless headphones and mobile phones in strong interference scenarios. On the other hand, by reusing the conductive components (such as metal, graphene, etc.) of the microphone at the top of the ear stem as the 5GHz antenna radiator, the optimal layout area inside the whole device that is not blocked by the human body can be utilized without reducing the 2.4GHz antenna layout space, thus ensuring the realization of antenna performance. This solves the problem of efficiency reduction caused by the reduction of 2.4GHz antenna aperture due to the 5GHz wiring occupying the ear stem space, while without adding extra layout space for the 5GHz antenna.

[0079] Because 5GHz signals have shorter wavelengths and less diffraction through the human body, the minimum gain of the horizontal plane pattern on the opposite side of the head is lower. After a communication connection is established between a mobile phone and a wireless headset, as the connection distance increases, the operating frequency will switch from 5GHz to 2.4GHz, and the audio quality will decrease from high-definition lossless to standard audio quality. If the zero-point gain of the 5GHz horizontal plane pattern can be increased, the maximum operating distance for high-definition lossless music can be extended.

[0080] For example, this application embodiment also provides another wireless earphone, which adds a third antenna to the existing multiplexed pickup channel as the first antenna, in order to improve the zero-point gain of the horizontal radiation pattern of the 5GHz antenna.

[0081] exist Figure 10 Based on this, refer to Figure 13 and Figure 14 , Figure 13 This diagram illustrates a block diagram of another wireless earphone 400 provided in an embodiment of this application. Figure 14 Figures A and B show partial structural schematic diagrams of the wireless earphone 400. The wireless earphone 400 provided in this application embodiment has a roughly the same structure as the wireless earphone 400 provided in the previous embodiment. You can refer to the content described in the previous embodiment. This application embodiment only introduces the differences.

[0082] The wireless earphone 400 also includes a third antenna 463, which is mounted on an antenna bracket 460. To save space, the third antenna 463 and the second antenna 461 are mounted on the same antenna bracket 460. The second antenna 461 is mounted on a first area of ​​the surface of the antenna bracket 460 using an LDS process. Here, the surface of the antenna bracket 460 refers to the surface of the antenna bracket 460 that is away from the first circuit board 440. The second antenna 461 is mounted on a second area of ​​the surface of the antenna bracket 460 using an LDS process. The first area is close to the ear cup, and the second area is away from the ear cup. That is, the third antenna 463 is located at the bottom of the ear stem, and the second antenna 461 is located at the top of the ear stem.

[0083] In this embodiment, the dimensions of the third antenna 463 satisfy the same condition as the dimensions of the first antenna; for example, the length of the third antenna 463 is approximately... λ1 is the wavelength of the 5GHz band signal, so the third antenna 463 can also be used to transmit and receive 5GHz band signals.

[0084] Figure 15 A schematic diagram of the radio frequency link of a wireless earphone provided in an embodiment of this application is shown. The wireless earphone includes a main control chip 441, a radio frequency front-end circuit 442, and a tuning switch 443. The main control chip 441, the radio frequency front-end circuit 442, and the tuning switch 443 are disposed on a first circuit board. The main control chip 441 includes a first signal terminal 4411 and a second signal terminal 4412. The first signal terminal 4411 of the main control chip 441 can be used to transmit and receive signals in a first frequency band, and the second signal terminal 4412 can be used to transmit and receive signals in a second frequency band. In this embodiment of the application, the first frequency band can be the 5GHz band, and the second frequency band can be the 2.4GHz band.

[0085] The first signal terminal 4411 of the main control chip 441 is connected to the first antenna and the third antenna 463 through the radio frequency front-end circuit 442 and the tuning switch 443, and the tuning switch 443 is used to select and switch the first antenna and the third antenna 463. The second signal terminal 4412 of the main control chip 441 is connected to the second antenna 461 through the radio frequency front-end circuit 442.

[0086] For example, the first circuit board is provided with a first feed point 444, a second feed point 445, and a third feed point 446. The first signal terminal 4411 of the main control chip 441 is electrically connected to the first feed point 444 and the third feed point 446 through the radio frequency front-end circuit 442 and the tuning switch 443. The pickup channel 472 is electrically connected to the first feed point 444 to form a first antenna, and the third antenna 463 is electrically connected to the third feed point 446. Thus, signals of the first frequency band can be transmitted and received through the first antenna and the third antenna 463. In this embodiment of the application, the first frequency band can be the 5GHz band. The main control chip 441 can switch the first antenna and the third antenna 463 according to the signal strength of the 5GHz band through the tuning switch 443.

[0087] The second signal terminal 4412 of the main control chip 441 is electrically connected to the second feed point 445 through the radio frequency front-end circuit 442, so that the second antenna 461 can transmit and receive signals of the second frequency band. In this embodiment of the application, the second frequency band can be the 2.4 GHz band.

[0088] The wireless earphones provided in this application embodiment employ a split dual-band Bluetooth antenna. Based on a 2.4GHz LDS antenna, a conductive structural component (e.g., metal) of the pickup assembly is reused as a 5GHz antenna, thus improving the antenna's radiation performance. The separate placement of the 2.4GHz and 5GHz antennas enables dual-band coverage of both bands. The 2.4GHz antenna enhances the minimum gain on the opposite side of the head in the horizontal plane, ensuring the maximum connection distance of the wireless earphones in scenarios involving wall penetration or long-distance communication. Furthermore, the 2.4GHz antenna is located at the upper part of the ear stem, and the pickup channel is located at the top of the ear stem. To increase the working distance of the 5GHz band, a third antenna is also provided at the bottom of the ear stem for transmitting and receiving 5GHz signals. Since the pickup channel and the third antenna are located at the top and bottom of the first circuit board respectively, the ground current distribution differs significantly, forming two different radiation fields with different minimum gains in the horizontal direction when worn. For example, see [reference needed]. Figure 16 , Figure 16 The diagram shows the gain curves of the horizontal radiation patterns of the first antenna (sound pickup channel) and the third antenna. The minimum gain of the horizontal radiation pattern of the first antenna is approximately at 128°, while the minimum gain of the horizontal radiation pattern of the third antenna is approximately at 149°. Therefore, when the wireless headset is operating at an angle of 128°, it can switch to the third antenna with higher gain, and when the wireless headset is operating at an angle of 149°, it can switch to the first antenna with higher gain. The two 5GHz antennas can complement each other, which can improve the minimum gain of the horizontal radiation pattern when the headset is worn, and increase the working distance of the 5GHz band.

[0089] In the above embodiment, the communication distance of the wireless earphone is improved by setting two 5GHz band antennas. One antenna is a first antenna formed by multiplexing the pickup channel at the top of the ear stem, and the other is a third antenna at the bottom of the ear stem. The wireless earphone also includes a second antenna operating in the 2.4GHz band. In one possible implementation, two or more 2.4GHz band antennas can be set to enhance the performance of the 2.4GHz band antennas. For example, two or more 2.4GHz band antennas can be set on the antenna bracket, and correspondingly, a tuning switch can be set to switch the 2.4GHz antennas.

[0090] This application also provides a charging case, which includes a charging case shell and a top cover. The top cover is rotatably connected to the charging case shell. The charging case shell includes a receiving slot for accommodating the wireless earphones provided in the foregoing embodiments. For example, wireless earphones are usually in pairs, i.e., including a left earphone and a right earphone. Accordingly, the charging case shell includes a first receiving slot and a second receiving slot. The first receiving slot is used to accommodate the left earphone, and the second receiving slot is used to accommodate the right earphone. When the wireless earphones are accommodated in the receiving slots, the charging case can also charge the wireless earphones.

[0091] This application embodiment also provides a wireless earphone assembly, which includes a charging case and the wireless earphones provided in the foregoing embodiments. The charging case includes a charging case shell and a top cover, the top cover being rotatably connected to the charging case shell. The charging case shell includes a receiving groove for receiving the wireless earphones.

[0092] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

Claims

1. A wireless earphone, characterized in that, It includes an ear cover and an ear stem; the ear stem includes a connecting part that connects to the ear cover and an ear stem rod that connects to the connecting part; The wireless earphone includes a first circuit board and a pickup channel. The first circuit board is disposed inside the ear stem and has a first power supply point. The pickup channel includes a conductive material and is electrically connected to the first power supply point.

2. The wireless earphone according to claim 1, characterized in that, The wireless earphone also includes a microphone and a pickup hole. The microphone is disposed on the first circuit board located within the connecting part, and the pickup hole is disposed at the top of the ear cup away from the wearer's ear. The pickup channel is used to transmit ambient noise collected from the pickup hole to the microphone.

3. The wireless earphone according to claim 1 or 2, characterized in that, The pickup channel includes a feed point located at the end of the pickup channel away from the earpiece, and the feed point is electrically connected to the first feed point; a notch is provided on the first circuit board, and the projection of the feed point of the pickup channel on the first circuit board along the thickness direction of the first circuit board is located within the notch.

4. The wireless earphone according to any one of claims 1 to 3, characterized in that, The first circuit board has a grounding point, and the pickup channel is electrically connected to the grounding point.

5. The wireless earphone according to claim 2, characterized in that, The wireless earphone also includes a dustproof mesh that covers the end of the pickup channel away from the pickup microphone. The dustproof mesh is made of a conductive material and is electrically connected to the pickup channel.

6. The wireless earphone according to any one of claims 1 to 5, characterized in that, The length of the pickup channel is λ1 / 5 to λ1 / 3, where λ1 is the wavelength of the 5GHz band signal.

7. The wireless earphone according to any one of claims 1 to 6, characterized in that, The wireless earphone also includes an antenna bracket and a second antenna, and a second feed point is provided on the first circuit board; The antenna bracket is disposed on the side of the first circuit board away from the wearer's ear, and the second antenna is disposed on the surface of the antenna bracket on the side away from the wearer's ear. The second antenna is electrically connected to the second feed point.

8. The wireless earphone according to claim 7, characterized in that, The length of the second antenna is λ2 / 5 to λ2 / 3, where λ2 is the wavelength of the 2.4 GHz band signal.

9. The wireless earphone according to claim 7 or 8, characterized in that, The pickup channel and the second antenna are located on opposite sides of the first circuit board.

10. The wireless earphone according to any one of claims 7 to 9, characterized in that, The wireless earphone includes a main control chip and an RF front-end circuit, and the main control chip and the RF front-end circuit are disposed on the first circuit board. The main control chip includes a first transceiver port and a second transceiver port. The first transceiver port is coupled to the first feed point through the radio frequency front-end circuit, and the second transceiver port is coupled to the second feed point through the radio frequency front-end circuit.

11. The wireless earphone according to any one of claims 7 to 9, characterized in that, The wireless earphone also includes a third antenna, and a third feed point is provided on the first circuit board. The third antenna is disposed on the surface of the antenna bracket away from the wearer's ear. The third antenna is connected to the third feed point. The length of the third antenna is λ1 / 5 to λ1 / 3, where λ1 is the wavelength of the 5GHz band signal.

12. The wireless earphone according to claim 11, characterized in that, The second antenna is disposed in a first region on the surface of the antenna bracket away from the wearer's ear, and the third antenna is disposed in a second region on the surface of the antenna bracket away from the wearer's ear. The first region is close to the earlobe, and the second region is far from the earlobe.

13. The wireless earphone according to claim 11 or 12, characterized in that, The wireless earphone includes a main control chip, an RF front-end circuit, and a tuning switch, wherein the main control chip, the RF front-end circuit, and the tuning switch are disposed on the first circuit board. The main control chip includes a first transceiver port and a second transceiver port. The first transceiver port is coupled to the first feed point through the radio frequency front-end circuit, and the second transceiver port is coupled to the second feed point and the third feed point through the radio frequency front-end circuit and the tuning switch.

14. A charging case, characterized in that, The charging case includes a charging case shell and a top cover, the top cover being rotatably connected to the charging case shell, and the charging case shell including a receiving groove for receiving the wireless earphones as described in any one of claims 1 to 13.

15. An earphone assembly, characterized in that, The earphone assembly includes a charging case and wireless earphones as described in any one of claims 1 to 13. The charging case includes a charging case housing and a top cover, the top cover being rotatably connected to the charging case housing. The charging case housing includes a receiving groove for receiving the wireless earphones.

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