CN209897243U

CN209897243U - Wireless earphone and electronic equipment

Info

Publication number: CN209897243U
Application number: CN201921238458.5U
Authority: CN
Inventors: 不公告发明人
Original assignee: Chengdu Bi Sheng Technology Co Ltd
Current assignee: Vodysound Technology (Sichuan) Co.,Ltd.
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-01-03
Anticipated expiration: 2029-08-01

Abstract

The application relates to a wireless earphone and an electronic device, and belongs to the technical field of earphones. The wireless headset includes: the antenna comprises a shell, a main board, a battery and a dipole antenna, wherein the main board, the battery and the dipole antenna are arranged in the shell. The pair of dipole antennas comprises an antenna body, a first arm and a second arm; one end of the antenna body is electrically connected with the feed end of the main board, and the other end of the antenna body is attached to the battery as an excitation source, so that the battery attached with the antenna body serves as the first arm, and the main board serves as the second arm. In the embodiment of the application, the antenna body is used as the excitation source to excite the battery body, so that the battery body is used as a part of the antenna to participate in radiation, the radiation efficiency of the antenna can be improved, the radio frequency transmission and receiving distance is increased, the product performance of the wireless earphone is improved, and the user experience is improved; and the stacking space in the earphone can be saved, and the assembly and manufacturing difficulty can be reduced.

Description

Wireless earphone and electronic equipment

Technical Field

The application belongs to the technical field of earphones, and particularly relates to a wireless earphone and an electronic device.

Background

With the development of technology, in recent years, wireless technology in the field of wireless communication has enabled convenient and fast communication between multiple devices, enabling users to communicate with electronic products such as mobile phones, vehicle multimedia and the like and listen to music through wireless headsets. The traditional wireless earphone usually uses a coaxial transmission line as an antenna, but the antenna designed in this way has the defect of low efficiency, and in order to improve the defect, the mainstream scheme is to arrange a CHIP-type antenna on a main board, namely, to adopt a CHIP antenna. However, the CHIP antenna needs to be mounted on the main board, and the size is large, and a clearance area with a certain area is needed, so that the area of the main board is increased, and the influence of the head of a human body on radiation causes the wireless transmission and receiving distance to be short.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the embodiments of the present application is to provide a wireless headset and an electronic device, so as to overcome the defects of large occupied area and low radiation efficiency of an antenna used in an existing wireless headset.

The embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides a wireless headset, including: a housing; a main board, a battery and a dipole antenna arranged in the shell; the pair dipole antenna comprises an antenna body, a first arm and a second arm, one end of the antenna body is electrically connected with the feed end of the main board, the other end of the antenna body is attached to the battery as an excitation source, so that the battery attached with the antenna body serves as the first arm, and the main board serves as the second arm. In the embodiment of the application, the antenna body is used as the excitation source to excite the battery body, so that the battery body is used as a part of the antenna to participate in radiation, the radiation efficiency of the antenna can be improved, the radio frequency transmission and receiving distance is increased, the product performance of the wireless earphone is improved, and the user experience is improved; and the stacking space in the earphone can be saved, and the assembly and manufacturing difficulty can be reduced.

With reference to one possible implementation manner of the embodiment of the first aspect, the other end of the antenna body is attached to the battery along a length direction of the battery. In this application embodiment, the other end of antenna body is attached on the battery directly along the length direction of battery, simple structure, the design of being convenient for.

With reference to a possible implementation manner of the embodiment of the first aspect, the other end of the antenna body is spirally wound and attached to the battery. In this application embodiment, the other end of antenna body is the heliciform winding and attaches on the battery for the length of battery body can be good at to the length of antenna body, improves wireless earphone's suitability.

With reference to one possible implementation manner of the embodiment of the first aspect, the antenna body is an FPC antenna. In the embodiment of the application, the FPC antenna is adopted, so that the antenna body is attached to the battery more closely, and the radiation effect is better.

With reference to a possible implementation manner of the embodiment of the first aspect, a length from one end of the battery, which is far away from the feeding end, to the feeding end is a multiple of a wavelength of a 2.4G frequency band, where a value of a is any one of values in an interval of 0.2 to 0.3. In the embodiment of the application, the length of the battery body as the excitation source is 0.2-0.3 times of the wavelength of the 2.4G frequency band, so that the conversion efficiency of alternating current and electromagnetic waves of the antenna during transmission and reception is ensured.

With reference to a possible implementation manner of the embodiment of the first aspect, a value of the a is 0.25. In the embodiment of the application, when the length of the battery body is one quarter of the wavelength of the 2.4G frequency band, the radiation efficiency of the antenna can be improved to the maximum.

With reference to one possible implementation manner of the embodiment of the first aspect, the battery is located at a rod portion of the housing far from the ear entrance, and the battery is a pouch battery or a metal housing battery. In this application embodiment, set up the battery in the pole portion of keeping away from the pleasant department of casing, reducible people's head is to the wireless earphone of pleasant formula in the radiation space influence, improves radiation efficiency.

With reference to one possible implementation manner of the embodiment of the first aspect, the wireless headset further includes a secondary board disposed in the housing, the secondary board is electrically connected to the main board, and the secondary board is provided with a functional circuit and an isolation circuit, where the isolation circuit is configured to suppress absorption of a radio frequency signal generated by the battery by the functional circuit. In the embodiment of the application, the isolation circuit is additionally arranged on the auxiliary plate to inhibit the functional circuit on the auxiliary plate from absorbing the radio frequency signal generated by the battery, so that the radiation efficiency is improved.

In combination with one possible implementation manner of the embodiment of the first aspect, the isolation circuit includes an inductor, and the functional circuit includes: the microphone comprises a microphone circuit, a charging circuit and a power supply circuit, wherein each signal line of the microphone circuit, each signal line of the charging circuit and each signal line of the power supply circuit are respectively provided with an inductor, and the signal lines are lines for communicating the auxiliary board and the main board. In the embodiment of the application, the inductors with the inhibiting effect on the radio frequency signals are adopted to form the isolation circuit, and each signal line of each functional circuit corresponds to one different inductor, so that the absorption effect of each functional circuit on the radio frequency signals generated by the battery is greatly reduced.

In a second aspect, an embodiment of the present application further provides an electronic device, including: a body and a communication module arranged in the body and adapted to the wireless headset according to the first aspect of the present invention and/or according to any of the possible embodiments of the first aspect of the present invention.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. The foregoing and other objects, features and advantages of the application will be apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not intended to be to scale as practical, emphasis instead being placed upon illustrating the subject matter of the present application.

Fig. 1 shows a schematic perspective structural view of a wireless headset according to an embodiment of the present application.

Fig. 2 shows an exploded view of a wireless headset according to an embodiment of the present application.

Fig. 3 shows a schematic structural diagram of a connection between an isolation circuit and a functional circuit according to an embodiment of the present application.

Fig. 4 shows a schematic structural diagram of a wireless headset and an electronic device coupling provided by an embodiment of the present application.

Icon: 10-wireless headset; 11-a housing; 111-a front shell; 112-rear shell; 12-a main board; 13-a battery; 14-an antenna body; 15-auxiliary board; 151-isolation circuit; 20-electronic equipment.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be noted that the terms "upper", "inner", and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The existing wireless earphone has two main antenna designs, one is to walk a part of antenna above the main board, and the part of antenna is coupled and radiated by feeding the antenna to match the ground of the main board. The other is to use a CHIP antenna, and perform coupling radiation by feeding the CHIP antenna and matching the ground of the main board. The scheme of walking a part of antenna wires above the main board has high requirements on space, the length required by the antenna wires is more than 25mm, and a certain clearance requirement is generally required at the projection position of the corresponding antenna on the main board due to the requirement on the performance of the antenna. The CHIP antenna also needs to be arranged on the mainboard, the size of the CHIP antenna is large, a clearance area with a certain area is required, the area of the mainboard can be occupied, the cost and the design difficulty are increased, and the internal stacking space of the wireless headset is compressed. In addition, the existing antennas all adopt independent antenna units, and the influence of the human head on the radiation space of the in-ear wireless earphone makes the wireless transmission and receiving distance shorter.

The above mentioned drawbacks are all the results of the inventor after practice and careful study, and therefore, the discovery process of the above mentioned problems and the solution proposed by the following embodiments of the present application to the above mentioned problems should be the contribution of the inventor to the present application in the course of the present invention.

In view of the above, in order to improve the above drawbacks, the present embodiment provides a wireless headset 10, as shown in fig. 1. The wireless headset 10 includes: the antenna comprises a shell 11, a main board 12 arranged in the shell 11, a battery 13 and an antenna body 14.

Referring to fig. 2, the housing 11 includes a front shell 111 and a rear shell 112 matching with the front shell 111. The front shell 111 and the rear shell 112 are connected in a threaded manner or a snap-fit manner to facilitate disassembly.

The feeding end of the main board 12 is electrically connected to one end of the antenna body 14, for example, through a metal device (e.g., a metal spring or a copper pillar). The main board 12 is provided with a radio frequency circuit matched with the antenna body 14, the radio frequency circuit may be a circuit known in the art, and the utility model is not related, and for the sake of brevity of the description, the detailed description is omitted.

In order to reduce the space required by the antenna body 14, in the implementation of the present application, one end of the antenna body 14 is electrically connected to the feeding end of the main board 12 through a metal device (such as a metal spring or a copper pillar), and the other end of the antenna body 14 is attached to the battery 13 as an excitation source, so that the battery 13 attached with the antenna body 14 participates in radiation as a part of the antenna, wherein the battery 13 attached with the antenna body 14 is used as one arm length of the antenna, and the main board 12 is used as the other arm length of the antenna, thereby forming a dipole antenna, and effectively improving the radiation efficiency of the antenna. That is, the dipole antenna includes: antenna body 14, first arm, second arm. The battery 13 with the antenna body 14 attached thereto serves as a first arm of the dipole antenna, and the main board 12 serves as a second arm of the dipole antenna. In the embodiment of the application, the battery 13 is used as one arm length of the antenna, so that the radiation efficiency of the antenna can be improved, the radio frequency transmission and receiving distance can be increased, the product performance of the wireless earphone 10 can be improved, and the user experience can be improved; but also can save the cost, save the inside space that piles up of earphone, reduce the assembly and make the degree of difficulty.

When the other end of the antenna body 14 is attached to the battery 13, the antenna body may be directly attached to the battery 13 along the length direction of the battery 13, and the extending direction may be a direction from the head end to the tail end of the battery 13. Of course, when the antenna body 14 is relatively long, the other end of the antenna body 14 may be spirally wound and attached to the battery 13. The other end of the antenna body 14 is only required to be attached to the battery 13, and is not required to be attached to a fixed surface of the battery 13, and the position of the antenna body may be any position of the battery 13, and the length of the antenna body is not limited.

In order to make the effect of attaching the antenna body 14 to the battery 13 better, in the embodiment of the present application, an FPC (Flexible Printed Circuit) antenna is used as an excitation source to excite the battery 13 to participate in radiation, so that the antenna body 14 can be closely attached to the battery 13, thereby enhancing the radiation and reducing the space required by the antenna body 14. It is understood that the antenna body 14 is not limited to the FPC antenna, but may be other commonly used bluetooth antennas. It should be noted that, the FPC antenna may be electrically connected to the feeding end of the main board 12 through a metal device (such as a metal spring or a copper pillar), and may be integrated with the main board 12 in a rigid-flex board manner.

The alternating current in the metal wire can emit an induced electric field and an induced magnetic field which are changed alternately to the space, which corresponds to the emission of radio signals, and on the contrary, the alternating electromagnetic field in the space can induce the alternating current when meeting the metal wire, which corresponds to the reception of the radio signals. In both transmission and reception, it is desirable that the alternating current in the wire be efficiently converted into the electromagnetic wave in space, or that the electromagnetic wave in space be efficiently converted into the alternating current in the wire, which makes it necessary for the wire for transmitting and receiving signals to have optimum conversion efficiency, and the wire for transmitting and receiving radio electromagnetic wave signals that satisfies such a requirement becomes the antenna body 14. In the embodiment of the present application, the antenna body 14 is used as an excitation source to excite the battery 13, so that the battery 13 participates in radiation as a part of the antenna body 14, and therefore, a certain requirement is also imposed on the length of the battery 13. Optionally, the working frequency band of the antenna body 14 in this embodiment of the application is a 2.4G frequency band, where a length from one end of the battery 13 far away from the feeding end to the feeding end (that is, a length of the battery body) is a times of a wavelength of the 2.4G frequency band. Wherein a is any value in the interval 0.2 to 0.3, for example, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3. Further, the value of a is 0.25, and repeated experiments and attempts by the inventor show that when the length of the antenna body 14 is about one fourth of the wavelength of the radio signal, the transmission and reception conversion efficiency of the antenna body 14 is the highest, so that when the length of the battery 13 is one quarter of the wavelength of the 2.4G frequency band, the radiation efficiency of the antenna body 14 can be improved to the maximum.

In view of the influence of the human head on the radiating space of the in-ear wireless headset 10, the battery 13 is optionally located on the stem portion of the housing 11 away from the in-ear, i.e. within the rear case 112. The stem of the wireless earphone 10 is far from the ear insertion, and the antenna body 14 and the battery 13 are disposed therein, so that the radiation space of the antenna body 14 is best, and the amount of radiation generated by the antenna body 14 absorbed by the surrounding metal is reduced under the same condition as compared with the design in which the antenna body 14 is disposed at the ear insertion. In addition, in the embodiment of the present application, the independent antenna body 14 is not used as a radiator, but the battery 13 is also used as a radiator to participate in radiation, so that the overall space utilization of the wireless headset 10 and the efficiency of the antenna body 14 are improved.

The battery 13 in the embodiment of the present application may be a battery 13 externally coated or wrapped with a conductive material, such as a metal casing 11 and the battery 13. Because one end of the antenna body 14 is electrically connected with the feeding end on the main board 12, the other end of the antenna body 14 is attached to the battery 13 as an excitation source body, and the outside of the battery 13 is conductive, which is equivalent to that the other end of the antenna body 14 is acted on a metal body, when the main board 12 sends alternating current to the antenna body 14, the alternating current acts on the shell of the battery 13, the shell of the battery 13 can generate alternating current, so that the battery 13 can emit an induced electric field and an induced magnetic field which are changed alternately to the space, and conversely, when the alternating electromagnetic field in the space meets the battery 13, the alternating current can be induced and returns to the main board 12 through the antenna body 14. Thus, the battery 13 is used as one arm length of the antenna to participate in radiation, the radiation intensity is greatly improved, and the transmission distance and the receiving distance of radio signals are further increased. Certainly, the battery 13 may also be a pouch battery 13, when the battery 13 is the pouch battery 13, the antenna body 14 is attached to the battery 13 at this time, the housing of the battery 13 may change the dielectric constant of the radiation of the antenna body 14, and at this time, the parameter of the matching circuit of the antenna body 14 needs to be modified to match with the antenna body 14, which is equal to that the battery 13 also participates in the radiation of the antenna body 14.

Considering that the radiation energy of the battery 13 is absorbed by the functional circuits in the housing 11, in the embodiment of the present application, the absorption of the radio frequency signal generated by the battery 13 by the functional circuits is optionally suppressed by adding the isolation circuit 151. Further, the wireless headset 10 further includes a sub-board 15 disposed in the housing 11, wherein the sub-board 15 is electrically connected to the main board 12, for example, the sub-board 15 is connected to the main board 12 through a connector, and for example, the sub-board 15 is connected to the main board 12 through a BToB connector. Of course, the sub-board 15 may be integrated with the main board 12 by a rigid-flex board.

The sub-board 15 is provided with functional circuits required by the wireless headset 10. In the embodiment of the present application, an isolation circuit 151 may be added to the sub-board 15 to suppress absorption of the rf signal generated by the battery 13 by these functional circuits. Alternatively, the isolation circuit 151 may be a circuit formed by an inductor, and since the inductor has a suppression effect on the rf signal, the inductor is added to the signal line of the functional circuit, so as to well suppress the absorption of the rf signal generated by the battery 13 by the functional circuit. The signal line is a line for communicating the sub-board 15 and the main board 12, that is, a line provided on the sub-board 15 for communicating the main board 12 and the sub-board 15.

One signal line of one functional circuit may correspond to only one inductor, or may correspond to 2 or more inductors. For the convenience of understanding, in the embodiments of the present application, an example in which one signal line of one functional circuit corresponds to one inductor is described. It is assumed that the functional circuit provided on the sub-board 15 includes: microphone circuit, charging circuit and supply circuit etc. and microphone circuit contains 3 signal lines, and charging circuit and supply circuit contain 2 signal lines respectively, and at this moment, isolating circuit 151 includes 7 inductances, wherein, respectively sets up an inductance on 3 signal lines of microphone circuit, respectively sets up an inductance on 2 signal lines of charging circuit and 2 signal lines of supply circuit. For convenience of understanding, please refer to the example shown in fig. 3, as shown in fig. 3, the isolation circuit 151 includes 7 inductors, which are respectively a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a fifth inductor L5, a sixth inductor L6, and a seventh inductor L7, the microphone circuit is connected to a corresponding circuit on the motherboard 12 through the first inductor L1, the second inductor L2, and the third inductor L3, the charging circuit is connected to a corresponding circuit on the motherboard 12 through the fourth inductor L4, and the fifth inductor L5, and the power supply circuit is connected to a corresponding circuit on the motherboard 12 through the sixth inductor L6 and the seventh inductor L7. Without the addition of an inductor, the radiated energy of the battery 13 is absorbed by these circuits, reducing the radiation efficiency and radio frequency performance.

The microphone circuit, the charging circuit and the power supply circuit can all adopt circuits well known in the field, and the utility model is not related to, and the microphone circuit, the charging circuit and the power supply circuit are not described in detail for the simplicity of the description.

It should be noted that, the number of inductors included in the isolation circuit 151 is determined by the number of functional circuits disposed on the sub-board 15 and the corresponding relationship between the functional circuits and the inductors, and if the number of functional circuits on the sub-board 15 is one, the number of inductors depends on the number of signal lines of the functional circuit if a one-to-one relationship is adopted, that is, the number of inductors is equal to the number of signal lines of the functional circuit; if a one-to-two relationship is adopted, at this time, the number of the inductors is equal to 2 times the number of the signal lines of the functional circuit, and the rest cases are not illustrated. When one signal line corresponds to more than two inductors, the more than two inductors can be connected in series or in parallel, or an isolation network can be formed in a series-parallel connection mode.

In the embodiment of the present invention, a portion surrounding the utility model is described in detail, and portions not related to the utility model, such as the functional circuits disposed on the main board 12 and the sub-board 15, or other components of the wireless headset 10, are not described, and this portion may refer to the design of the existing wireless headset 10.

To sum up, in the implementation of the present application, one end of the antenna body 14 is electrically connected to the feed end of the main board 12 through a metal device (such as a metal elastic sheet or a copper pillar), and the other end of the antenna body 14 is attached to the battery 13 as an excitation source body, so that the battery 13 participates in radiation as one arm length of the antenna, and the main board 12 and the metal device of the auxiliary connection form another arm length of the antenna, thereby forming a dipole antenna, and effectively improving the radiation efficiency of the antenna. The battery 13 is used as the antenna, so that the radiation efficiency of the antenna can be improved, the radio frequency transmission and receiving distance can be increased, the product performance of the wireless earphone 10 can be improved, and the user experience can be improved; but also can save the electron and the structural cost, reduce the electron and the structural design degree of difficulty to save the inside space that piles up of earphone, reduce the assembly and make the degree of difficulty.

Second embodiment

The embodiment of the present application further provides an electronic device 20, as shown in fig. 4, including a body and a communication module disposed in the body and matching with the wireless headset 10, so as to facilitate communication with the wireless headset 10. The electronic device 20 may be a notebook computer, a vehicle-mounted device, a mobile phone, a tablet, or other electronic devices 20 having a communication module matching the wireless headset 10.

The communication module may be a wireless module.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

The embodiment of the present invention provides a communication module in an electronic device 20, which has the same implementation principle as the communication principle of the antenna body 14 in the foregoing wireless earphone 10 embodiment, and for brief description, no mention may be made to the corresponding content in the foregoing wireless earphone 10 embodiment.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wireless headset, comprising:

a housing;

a main board, a battery and a dipole antenna arranged in the shell; the pair dipole antenna comprises an antenna body, a first arm and a second arm, one end of the antenna body is electrically connected with the feed end of the main board, the other end of the antenna body is attached to the battery as an excitation source, so that the battery attached with the antenna body serves as the first arm, and the main board serves as the second arm.

2. The wireless headset of claim 1, wherein the other end of the antenna body is attached to the battery along a length direction of the battery.

3. The wireless earphone according to claim 1, wherein the other end of the antenna body is spirally wound and attached to the battery.

4. A wireless earphone according to any one of claims 1-3, wherein the antenna body is an FPC antenna.

5. The wireless earphone according to claim 4, wherein the length from the end of the battery far away from the feeding end to the feeding end is A times of 2.4G frequency band wavelength, wherein the value of A is any value in the interval of 0.2 to 0.3.

6. The wireless headset of claim 5, wherein A is 0.25.

7. The wireless headset of claim 1, wherein the battery is located on a stem portion of the housing distal from the ear entrance, the battery being a pouch battery or a metal housing battery.

8. The wireless headset of claim 1, further comprising a secondary board disposed in the housing, the secondary board being electrically connected to the main board, the secondary board having a functional circuit and an isolation circuit disposed thereon, the isolation circuit being configured to inhibit absorption of the radio frequency signal generated by the battery by the functional circuit.

9. The wireless headset of claim 8, wherein the isolation circuit comprises an inductor, the functional circuit comprising: the microphone comprises a microphone circuit, a charging circuit and a power supply circuit, wherein each signal line of the microphone circuit, each signal line of the charging circuit and each signal line of the power supply circuit are respectively provided with an inductor, and the signal lines are lines for communicating the auxiliary board and the main board.

10. An electronic device comprising a body and a communication module disposed within the body that mates with the wireless headset of any of claims 1-9.