WO2021042875A1

WO2021042875A1 - Earphone

Info

Publication number: WO2021042875A1
Application number: PCT/CN2020/102100
Authority: WO
Inventors: 张俊宏; 王汉阳; 兰尧; 徐慧梁; 鹿麟
Original assignee: 华为技术有限公司
Priority date: 2019-09-02
Filing date: 2020-07-15
Publication date: 2021-03-11
Also published as: CN112449260B; CN112449260A

Abstract

The present application provides an earphone, comprising: a battery, provided in an ear handle of the earphone and formed into a columnar body; and an antenna, electrically connected to the battery and configured to transmit or receive a signal using the electric power supplied from the battery, wherein the antenna comprises a flexible printed circuit (FPC) coil, serving as a radiator of the antenna, being provided on a side surface of the battery; the winding of the axis of the FPC coil is perpendicular to the height direction of the battery; and after the side surface of the battery is expanded, the FPC coil maintains winding, and is laid flat on a plane formed after the side surface is expanded. Thus, it is ensured that the earphone has a sufficient clear space, and can satisfy the requirements on layout and wiring in the earphone, thereby improving the communication effect of the earphone, and facilitating the improvement of user experience.

Description

headset

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office, the application number is 201910824593.6, and the application name is "headphone" on September 02, 2019, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of electronic equipment, and more specifically, to a headset.

Background technique

The true wireless stereo (TWS) headset completely abandons the wire connection method. There are three types of existing TWS headsets to establish a wireless connection: dual-transmission scheme, monitoring scheme, and forwarding scheme. The left earphone and the right earphone of the existing TWS earphone products mainly forward audio signals through Bluetooth (BT) or near field magnetic induction (NFMI). Because the BT forwarding method has the disadvantages of large head loss and large environmental interference, the NFMI method of forwarding audio signals has gradually become the mainstream technology due to its low power consumption, low absorption rate, anti-interference and other advantages. Due to the large size of the ferrite core coil (5.5mm*2.0mm*2.0mm) that meets the NFMI requirements, many TWS headset products cannot achieve NFMI communication, or because there is not enough headroom to meet the layout and wiring rules, the communication effect is caused. not good.

Summary of the invention

The present application provides a headset, which improves the communication effect of the headset and helps improve user experience.

In a first aspect, an earphone is provided, including: a battery, which is arranged in the ear handle of the earphone and formed as a cylindrical body; an antenna, which is electrically connected to the battery, and is used to transmit or receive power provided by the battery Signal, the antenna includes: a flexible circuit board FPC coil, as the radiator of the antenna, arranged on the side surface of the battery, the winding axis of the FPC coil is perpendicular to the height direction of the battery, and so After the side surface of the battery is unfolded, the FPC coil remains in the state of being wound around the coil, and is laid flat on a plane formed after the side surface is unfolded.

Optionally, the FPC coil may be pasted on the side surface of the battery through an adhesive.

Specifically, the FPC coil may be formed in a flat shape, and one surface of the flat FPC coil may be bonded to the side surface of the battery via an adhesive.

The above-mentioned earphone includes a battery and an antenna arranged in the ear handle of the earphone, wherein the battery is formed as a cylindrical body, the antenna includes an FPC coil, and the FPC coil is used as the radiator of the antenna and is arranged on the side surface of the battery. The winding axis is perpendicular to the height direction of the battery. When the side surface of the battery is unfolded, the FPC coil can maintain the state of the coil, and it is laid flat on the plane formed by the unfolded side surface of the battery, so as to ensure that the earphone has enough headroom , Can meet the requirements of the layout and wiring in the headset, improve the communication effect of the headset, and help improve the user experience.

With reference to the first aspect, in a possible implementation manner, the battery is formed in a prismatic shape, and the FPC coil is disposed on a first side surface of the battery, and the first side surface is perpendicular to the first direction or Approximately vertical, the first direction is the direction of the horn of the earphone.

The battery is arranged in a prismatic shape, and the FPC coil is arranged on the first side surface of the battery that is perpendicular or approximately perpendicular to the direction of the earphone speaker, so as to ensure that the earphone has enough headroom, which can meet the requirements of the layout and wiring in the earphone, and improve The communication effect of the headset is improved, which helps to improve the user experience.

With reference to the first aspect, in a possible implementation manner, the battery includes at least two side surfaces perpendicular to the first direction, and the first side surface is the side surface in the first side surface. The side surface located on the foremost side in the direction.

Wherein, the side surface on the most front side can be understood as the side surface on the side close to the human face when the user wears the earphone.

When the battery includes at least two side surfaces perpendicular to the horn of the earphone, the FPC coil is arranged on the side surface of the battery on the front side perpendicular or approximately perpendicular to the horn of the earphone, so that the user can wear the earphone. , There is no battery shield between the left earphone coil and the right earphone coil, which improves the coupling signal strength of the earphone and helps to improve the user experience.

With reference to the first aspect, in a possible implementation manner, the battery is formed in a cylindrical shape, the axis of the battery is perpendicular or approximately perpendicular to a first direction, and the first direction is the orientation of the horn of the earphone, And the FPC coil is arranged on the side surface of the battery.

The battery is arranged in a cylindrical shape, and the axis of the battery is perpendicular or approximately perpendicular to the direction of the speaker of the earphone, and the FPC coil is arranged on the side surface of the battery, so as to ensure that the earphone has enough headroom to meet the requirements of the layout and wiring in the earphone. The communication effect of the headset is improved, which helps to improve the user experience.

With reference to the first aspect, in a possible implementation manner, a first plane divides the side surface of the battery into a first part and a second part, and the first plane passes through the first diameter of the battery A plane, the first diameter is perpendicular or approximately perpendicular to a first direction, the first direction is the direction of the horn of the earphone, and the first part is located in front of the second part in the first direction, And the FPC coil is arranged on the first part of the side surface of the battery.

Wherein, the front part can be understood as the part of the earphone close to one side of the human face when the user wears the earphone.

Divide the side surface of the battery into a first part and a second part along a first plane of the first diameter of the battery, wherein the first diameter direction is perpendicular or approximately perpendicular to the direction of the horn of the earphone, and the first part is in front of the second part; And the FPC coil is arranged on the first part of the side of the battery, so as to ensure that the earphone has enough headroom, which can meet the requirements of layout and wiring in the earphone, improve the communication effect of the earphone, and help improve the user experience.

With reference to the first aspect, in a possible implementation manner, a ferrite sheet is provided between the first side surface and the FPC coil.

A ferrite sheet is arranged between the first side surface and the FPC coil, and the ferrite sheet is a magnetic material, which can effectively reduce the absorption of the antenna signal by the battery.

With reference to the first aspect, in a possible implementation manner, the ferrite sheet includes: a convex portion; a surrounding portion surrounding the convex portion; and the FPC coil is attached to the surrounding portion And, the protruding part is located in the ring formed by the FPC coil.

The ferrite sheet includes a convex part and a surrounding part surrounding the convex part, and the FPC coil is arranged in the surrounding part, and the convex part is located in the ring formed by the FPC coil, so that the FPC coil can be better fixed and improved. The communication effect of the headset is improved, which helps to improve the user experience.

With reference to the first aspect, in a possible implementation manner, the earphone further includes: a ferrite core configured on the ferrite sheet, and the ferrite core is located in the ring formed by the FPC coil .

A ferrite core is arranged on the ferrite sheet of the earphone, and the ferrite core is located in the ring formed by the FPC coil, thereby improving the communication effect of the earphone and helping to improve the user experience.

In a second aspect, an earphone is provided, including: a horn; an inner shell of the horn, covering at least the sound-emitting surface of the horn; a battery for providing power; an antenna, electrically connected to the battery, for using the battery The provided power transmits or receives signals, and the antenna includes: a flexible circuit board FPC coil, which serves as a radiator of the antenna, is formed in a plane shape, and is arranged on the inner shell of the horn.

The above-mentioned earphone includes a horn, an inner shell of the horn and an antenna covering at least the sound-emitting surface of the horn, wherein the antenna is electrically connected to the battery for transmitting or receiving signals using the power provided by the battery. The antenna includes an FPC coil, and the FPC coil is used as the antenna The radiator is arranged on the inner shell of the speaker, so as to ensure that the earphone has sufficient headroom, which can meet the requirements of layout and wiring in the earphone, improve the communication effect of the earphone, and help improve the user experience.

With reference to the second aspect, in a possible implementation manner, the horn inner shell includes a first surface facing the horn and a second surface facing away from the horn, and the FPC coil is attached to the The second surface.

Set the FPC coil on the second surface facing away from the horn. When the user is wearing the earphone, the earphone antenna is placed in the user's ear, so that the distance between the antenna of the left earphone and the antenna of the right earphone can be smaller than that of the user The width of the two ears reduces the NFMI receiving sensitivity requirement of the headset for near-field magnetic induction communication.

With reference to the second aspect, in a possible implementation manner, a groove is provided on the second surface of the horn inner shell on which the FPC coil is applied, and the FPC coil is disposed in the groove Inside.

A groove is provided on the second surface where the FPC coil is attached to the inner shell of the horn, and the FPC coil is arranged in the groove, so that the antenna including the FPC coil and other structural parts of the earphone are formed as one body, avoiding the NFMI antenna Affect the size of the entire headset.

With reference to the second aspect, in a possible implementation manner, a ferrite sheet is provided between the inner shell of the horn and the FPC coil.

A ferrite sheet is arranged between the inner shell of the horn and the FPC coil. The ferrite sheet is a magnetic material, which can effectively reduce the absorption of the antenna signal by the battery.

With reference to the second aspect, in a possible implementation manner, the ferrite sheet includes: a convex portion; a surrounding portion surrounding the convex portion; and the FPC coil is attached to the surrounding portion And, the protrusion is located in the closed loop formed by the FPC coil.

With reference to the second aspect, in a possible implementation manner, the earphone further includes: a ferrite core, which is configured on the first ferrite sheet, and the ferrite core is located in the formation of the FPC coil Inside the closed loop.

In a third aspect, there is provided an earphone, including: a battery arranged in the ear handle of the earphone and formed in a cylindrical shape; an antenna, electrically connected to the battery, for sending or receiving signals using the power provided by the battery The antenna includes: a spiral coil as a radiator of the antenna, wound on the battery; and a ferrite sheet arranged between the side surface of the battery and the spiral coil. The above-mentioned earphone includes a cylindrical battery, an antenna, and a ferrite sheet arranged in the ear handle of the earphone. The antenna is electrically connected to the battery for transmitting or receiving signals using the power provided by the battery. The antenna includes a radiator that can be used as an antenna. The spiral coil is wound on the battery, and a ferrite sheet is arranged between the side of the battery and the spiral coil. Thereby, it is ensured that the earphone has sufficient headroom, which can meet the requirements of layout and wiring in the earphone, improves the communication effect of the earphone, and helps to improve the user experience.

With reference to the third aspect, in a possible implementation manner, the ferrite sheet includes a first area covered with the spiral coil, and a second area and a third area not covered with the spiral coil. The first area is located between the second area and the third area. Therefore, the eddy current loss of the battery can be further reduced.

With reference to the third aspect, in a possible implementation manner, the length of the second area and the third area in the height direction of the battery is greater than or equal to the height of the first area in the battery. The length in the direction.

With reference to the third aspect, in a possible implementation manner, the battery includes a fourth area covered with the ferrite sheet, and a fifth area and a sixth area not covered with the ferrite sheet, so The fourth area is located between the fifth area and the sixth area. Therefore, the eddy current loss of the battery can be further reduced.

Description of the drawings

FIG. 1 is a schematic diagram of a communication system 100 of a headset application provided by an embodiment of the present application.

Figure 2 is a true wireless stereo TWS headset.

Fig. 3 is a diagram of four positions of a ferrite core wound with a coil in space.

FIG. 4 is a three-dimensional diagram of a headset 400 provided by an embodiment of the present application.

FIG. 5 is a three-dimensional schematic diagram of a battery 410 provided by an embodiment of the present application.

FIG. 6 is a two-dimensional schematic diagram of a ferrite sheet 422 in the xy plane provided by an embodiment of the present application.

FIG. 7 is a two-dimensional schematic diagram of an FPC coil 421 attached to a ferrite sheet 422 in the yz plane according to an embodiment of the present application.

FIG. 8 is a schematic diagram of the pad layout of an FPC coil 421 provided by an embodiment of the present application.

FIG. 9 is a schematic diagram of an NFMI circuit design provided by an embodiment of the present application.

FIG. 10 is a three-dimensional schematic diagram of a headset 1000 according to another embodiment of the present application.

FIG. 11 is a two-dimensional schematic diagram of a ferrite sheet 1040 provided by the present application.

FIG. 12 is a three-dimensional schematic diagram of an FPC coil 1031 attached to a ferrite sheet 1040 according to an embodiment of the present application.

FIG. 13 is a three-dimensional view of the internal components of another earphone 1300 provided by an embodiment of the present application.

FIG. 14 is a cross-sectional three-dimensional view of the internal components of the earphone 1300 provided by an embodiment of the present application.

detailed description

The technical solution in this application will be described below in conjunction with the accompanying drawings.

As shown in FIG. 1, it is a schematic diagram of a communication system 100 related to the headset in an embodiment of the present application. As shown in FIG. 1, the communication system 100 may include communication between two earphones, such as the communication between the earphone 110 and the earphone 120 as shown in FIG. 1, and the communication system 100 may also include communication between the earphone and the terminal device. The communication is the communication between the headset 110 and the terminal device 130 as shown in FIG. 1, or the communication between the headset 120 and the terminal device 130. Among them, the communication between the headset and the headset, or the headset and the terminal device is mainly through BT or NFMI to complete the audio signal forwarding.

Among them, the terminal device may include a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem. It can also include subscriber units, cellular phones, smart phones, wireless data cards, personal digital assistant (PDA) computers, tablet computers, wireless modems, and handheld devices. ), laptop computer, machine type communication (MTC) terminal, point of sales (POS), in-vehicle computer, wireless local area networks (WLAN) sites ( station, ST), which can be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and next-generation communication systems, such as terminals in 5G networks Equipment or terminal equipment in the future evolved public land mobile network (PLMN) network and other terminal equipment with cameras, etc. For example, the communication device may be a mobile phone, a tablet computer, or an electronic product equipped with a camera.

Among them, wearable devices can also be called wearable smart devices, which are the general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be realized without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets and smart jewelry for physical sign monitoring.

Before introducing the technical solutions of the embodiments of the present application, concepts related to the embodiments of the present application are introduced first.

In-ear headphones: also known as in-ear earphones, in-ear earplugs, or in-ear monitors (IEM), are a kind of earphones used inside the human auditory organs. In-ear earphones generally consist of the headphone body and the sound output. Composed of tube and earmuffs. Among them, the earphone body is fixedly connected with the sound tube, and the ear sleeve is sleeved on the sound tube. When the user uses the in-ear earphone, the ear sleeve can be fitted to the inner wall of the user's ear canal. In this way, the in-ear earphone, the inner wall of the ear canal and the eardrum can form a closed cavity in front to obtain better airtightness and reduce the interference of external noise on the sound output by the sound tube.

As shown in Figure 2, it is a TWS headset. The TWS headset may be a TWS headset that uses a ferrite core coil to implement NFMI forwarding. The TWS earphone includes a left earphone 110 and a right earphone 120, wherein the left earphone 110 and the right earphone 120 are respectively provided with a corresponding ferrite core, and the ferrite core is wound with a coil, the left earphone 110 and the right earphone 120 is to communicate through near magnetic field induction. When the user wears the earphone, the position between the ferrite core in the left earphone 110 and the ferrite core in the right earphone 120 can be divided into the following two situations. Case 1: The ferrite in the left earphone 110 The axis of the body core is parallel to the axis of the ferrite core in the right earphone 120; Case 2: The axis of the ferrite core in the left earphone 110 and the axis of the ferrite core in the right earphone 120 intersect. As shown in Figure 3, there are three bit patterns of ferrite cores wound with coils in space. In FIG. 3, for example, the ferrite core 310 may be a ferrite core placed in the left earphone 110, and the ferrite core 320, ferrite core 330, or ferrite core 340 may be placed The ferrite core in the right earphone 120. Among them, the axis of the ferrite core 310 coincides with the axis of the ferrite core 340. According to the right-hand rule, it can be obtained that the coil on the ferrite core 310 forms a magnetic field and the coil on the ferrite core 340 Because the magnetic field formed by the coil on the ferrite core 310 and the magnetic field formed by the coil on the ferrite core 340 will not interfere with the magnetic field formed, the communication effect between the left earphone 110 and the right earphone 120 is the best Great. The axis of the ferrite core 310 can be parallel to the axis of the ferrite core 320 (excluding the case where the axis of the ferrite core 310 and the axis of the ferrite core 320 overlap), then according to the right-hand rule, The magnetic field formed by the coil on the ferrite core 310 and the magnetic field formed by the coil on the ferrite core 320 can be obtained, because the magnetic field formed by the coil on the ferrite core 310 is the same as the coil on the ferrite core 320 The formed magnetic field produces less interference, so that the communication effect between the left earphone 110 and the right earphone 120 is good. The axis of the ferrite core 310 can be perpendicular to the axis of the ferrite core 330. According to the right-hand rule, the coil on the ferrite core 310 can form a magnetic field and the coil on the ferrite core 330 Because the magnetic field formed by the coil on the ferrite core 310 will interfere with the magnetic field formed by the coil on the ferrite core 330, it will affect the communication effect between the left earphone 110 and the right earphone 120. As a result, the communication effect between the left earphone 110 and the right earphone 120 is poor. In the prior art, the size of the ferrite core coil needs to be at least 5.5mm×2.0mm×2.0mm, and the ferrite core coil is mounted on the printed board, resulting in an increase in the size of the printed board, and the two coils The end cannot be close to metal, and a large headroom is required, resulting in a large structure of the headset. When the user wears the TWS headset, if the axis of the left earphone coil and the axis of the right earphone coil intersect (for example, the coil on the ferrite core 310 and the coil on the ferrite core 330 in FIG. 3), it will cause the left The connection between the headset and the right headset is disconnected. As shown in Figure 2, the dotted line indicates the axis direction of the ferrite core coil. When the two axes are parallel, the communication distance can reach 20-25cm; if the axis of one of the ferrite core coils is rotated 90 degrees, the communication distance will be severe If the communication distance is less than 15cm, the user will not be able to complete the communication when wearing the TWS headset.

In this regard, the embodiments of the present application provide a headset that can improve communication effects and help improve user experience.

Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to FIG. 4 to FIG. 14.

It should be understood that the schematic structure diagrams of the earphones and various components shown in FIGS. 4 to 14 are schematic illustrations, and any modified implementation or connection manners are within the protection scope of the embodiments of the present application.

As shown in FIGS. 4 to 14, the earphone includes a battery 410 and an antenna 420. Wherein, the battery 410 is arranged in the ear handle of the earphone and is formed as a cylindrical body; the antenna 420 is electrically connected to the battery 410 for sending or receiving signals using the power provided by the battery 410. The antenna 420 includes a flexible printed circuit (FPC) coil 421. The FPC coil 421 serves as a radiator of the antenna and is arranged on the side surface of the battery 410. The winding axis of the FPC coil 421 is perpendicular to the height direction of the battery 410 And after the side surface of the battery 410 is unfolded, the FPC coil 421 remains in the state of winding the coil, and is laid flat on the plane formed after the side surface is unfolded.

In the above-mentioned earphone, the FPC coil is arranged on the side surface of the battery. Therefore, it is ensured that the earphone has sufficient headroom and can meet the requirements of the layout and wiring in the earphone. When the user wears the above-mentioned earphone, the winding axis of the above-mentioned FPC coil 421 is the connection line between the user's two ears. The height direction of the battery 410 can be understood as the height direction of the earphone, that is, when the user wears the earphone, the height direction of the battery 410 is the direction along the height of the user.

When the user is wearing the headset, the antenna is electrically connected to the battery, and uses the power provided by the battery to send or receive signals. The antenna includes an FPC coil. The FPC coil 421 serves as the radiator of the antenna, and the winding axis of the FPC coil 421 is In order to follow the line between the user’s two ears, therefore, when the user rotates one of the earphones against the face, the wire will not be caused, and the communication distance can still meet the requirements of the head model, which improves the communication effect of the earphone and helps to improve user experience.

In the following, the connection relationship and position relationship between the various components will be described in detail with reference to the specific drawings.

As shown in FIG. 4, a three-dimensional view of an earphone 400 provided by this embodiment of the application. The earphone 400 may include a battery 410, which is arranged in the ear stem of the earphone and formed into a cylindrical body; an antenna 420 includes: an FPC coil 421 , Set on the side surface of the battery.

The height direction of the battery 410 may be along the y-axis direction, and the winding axis of the FPC coil 421 is also along the x-axis direction.

Hereinafter, the two shapes formed by the battery will be described in detail.

(1) The battery 410 may be formed as a prism, and the FPC coil 421 is arranged on the first side surface of the battery 410, the first side surface is perpendicular or approximately perpendicular to the first direction, and the first direction is the direction of the horn of the earphone.

Wherein, the battery includes at least two side surfaces perpendicular to the first direction, and the first side surface is the surface that is located at the foremost side in the first direction among the surfaces.

Wherein, the front-most surface can be understood as the surface on the side of the headphone close to the face when the user wears the headphone.

For example, as shown in FIG. 4, the first direction may be along the x-axis direction, the first side surface may be 411, and the second side surface may be 412.

For example, as shown in Figure 5(a), it is a prismatic battery provided by an embodiment of the present application, wherein the first side surface of the battery 410 may be 411, and the battery 410 may also include The second side surface may be 412, where the first direction may be a direction along the x-axis. For another example, as shown in FIG. 5(b), it is another prismatic battery provided by an embodiment of the present application. The first side surface of the battery 410 may be 411, and the battery 410 may also include The second side surface and the third side surface are perpendicular to the direction, the second side surface may be 412, and the third side surface may be 415, where the first direction may be a direction along the x-axis.

In the case where the battery 410 is a prismatic body, the winding axis of the FPC coil 421 is the x-axis, the height direction of the battery 410 is the y-axis, and the side surface of the battery 410 is unfolded, the FPC coil 421 remains in the state of the coil and is flat. Spread on the flat surface formed by unfolding the side surface.

(2) The battery 410 is formed in a cylindrical shape, the axis of the battery is perpendicular or approximately perpendicular to the first direction, the first direction is the direction of the horn of the earphone, and the FPC coil is arranged on the side surface of the battery.

Wherein, the first plane divides the side surface of the battery into a first part and a second part, the first plane is a plane passing through the first diameter of the battery, the first diameter is perpendicular or approximately perpendicular to the first direction, and the first part is on the first side. It is located upward in the front of the second part, and the FPC coil is arranged on the first part of the side surface of the battery.

Among them, the front part can be understood as the part of the earphone close to the face of the person when the user wears the earphone.

For example, as shown in FIG. 5(c), it is a cylindrical battery provided by an embodiment of the present application. In Figure 5(c), the first plane 413 divides the side surface of the battery 410 into a first part 413' and a second part 413". The first diameter direction is along the y axis, and the first direction is along the x axis. Direction.

As shown in the right figure in Figure 5(c), when the battery 410 is cylindrical, the winding axis of the FPC coil 421 is along the diameter direction of the bottom surface of the cylinder, that is, the x-axis, and the height direction of the battery 410 is along the height of the cylinder. As shown in the left figure in Figure 5(c), after the side surface of the battery 410 is unfolded, the FPC coil 421 remains in the state of the coil and is laid flat on the plane formed by the unfolded side surface .

Optionally, the positive electrode pad of the battery 410 is arranged at the end of the earstalk, and the positive electrode of the battery 410 is welded to the FPC of the soft and hard combination version. As shown in Figure 4 and Figure 8.

Optionally, a ferrite sheet 422 is provided between the first side surface and the FPC coil 421.

As shown in FIG. 6, a two-dimensional schematic diagram of a ferrite sheet 422 in an xy plane provided by an embodiment of this application, wherein the x-axis direction is the first direction, that is, the direction of the speaker of the earphone, and the y-axis direction It is the direction from the earstalk to the horn, and the y-axis is perpendicular to the x-axis. The ferrite sheet 422 includes: a convex portion 422'; a surrounding portion 422" surrounding the convex portion 422'; and the FPC coil 421 is attached to the surrounding portion 422", and the convex portion 422' is located on the FPC coil 421 formed within the ring.

The above-mentioned surrounding portion 422" is non-convex. The above-mentioned convex portion 422' can be understood as being convex relative to the surrounding portion 422".

For example, as shown in FIG. 7, a two-dimensional schematic diagram of an FPC coil 421 attached to the yz plane of a ferrite sheet 422 according to an embodiment of the present application, wherein the z axis is along the first side surface and is related to x The axis and y axis are perpendicular to each other.

Wherein, the FPC coil is arranged on the surrounding portion 422" of the ferrite sheet 422 around the x-axis, and the surrounding portion 422" of the ferrite sheet 422 surrounds the protruding portion 422' of the ferrite sheet 422.

Optionally, as shown in FIG. 7, the pad of the FPC coil 421 may be arranged on the surrounding portion 422 ″ of the ferrite sheet 422.

Optionally, as shown in FIG. 8, it is a schematic diagram of the pad layout of an FPC coil 421 provided in an embodiment of the present application. The pad of the aforementioned FPC coil 421 can also be arranged at the end of the earstalk, and the FPC coil 421 is welded to the FPC 450 of the soft and hard combination version.

Optionally, the pad of the FPC coil 421 includes two coil ports, and one of the two coil ports is connected to the positive pole of the circuit, and the other coil port is connected to the negative pole of the circuit.

For example, as shown in FIG. 7, the pad of the FPC coil 421 includes two coil ports, namely 421' and 421", wherein one coil port 421' of the two coil ports is connected to the positive pole of the circuit, and the other coil port 421" is connected to the negative pole of the circuit; or one of the two coil ports 421" is connected to the positive pole of the circuit, and the other coil port 421' is connected to the negative pole of the circuit.

Wherein, the FPC coil 421 can be adhered to the surrounding portion 422" of the ferrite sheet 422 by an adhesive.

Optionally, the earphone may further include a ferrite core, which is disposed on the ferrite sheet, and the ferrite core is located in the ring formed by the FPC coil 421.

The ferrite core is located in the ring formed by the FPC coil 421, and the FPC coil 421 is arranged on the surrounding part 422' of the ferrite sheet 422 around the x-axis, so the ferrite core is arranged on the convex part of the ferrite sheet 422 On 422', or the ferrite core is provided in the part between the raised portion 422' of the ferrite sheet 422 and the FPC coil 421. Through the above-mentioned semi-in-ear TWS earphone, the earphone includes a battery, an FPC coil arranged on the first side surface of the battery, and a ferrite sheet arranged between the first surface and the FPC coil, and the FPC coil is adhered to by double-sided adhesive. On the surrounding part of the ferrite sheet. Wherein, the winding axis of the FPC coil is perpendicular to the height direction of the battery, and after the side surface of the battery is unfolded, the FPC coil remains in the state of a spiral coil, and is laid flat on the plane formed by the unfolded side surface of the battery, thereby ensuring the headset There is enough headroom to meet the requirements of layout and wiring in the headset, improve the communication effect of the headset, and help improve the user experience. This allows the user to wear the left and right earphones, the communication distance can reach 25cm, and when the user rotates the ear handle of the earphone, it will not cause the disconnection, and it can ensure that the earphone has enough headroom to meet the requirements of the layout and wiring in the earphone. , Improve the communication effect of the headset and help improve the user experience. At the same time, the FPC coil is arranged on the side close to the human face, so that there is no battery shield between the left earphone coil and the right earphone coil, and the coupling signal strength is improved.

As shown in FIG. 9, it is a schematic diagram of an NFMI circuit design provided by an embodiment of the present application. The NFMI circuit may be used in the aforementioned earphone 400 to implement audio signal forwarding. The NFMI circuit includes a radio frequency transceiver chip 710, an NFMI antenna equivalent circuit 720, a first capacitor 730, a second capacitor 740, and a third capacitor 750. Wherein, the radio frequency transceiver chip 710 may include a transceiver unit 711 and a transceiver unit 712, where the transceiver unit 711 may be a P pole, and the transceiver unit 712 may be an N pole; the capacitance value of the first capacitor 730 is C1=56 pF, and the second capacitor 740 is The capacitance value is C2=56pF, and the capacitance value of the third capacitor 750 is C3=60pF; the NFMI antenna equivalent circuit 720 may include a first inductor 721, where the inductance value of the first inductor 721 is 1.2μH, and the value of the first inductor 721 Resistance R=0.3Ohm. The antenna inductance value is designed to be 1.2μH, the purpose is to avoid too many turns of the coil, so as to increase the effective area of the magnetic flux. The NFMI antenna is tuned to 16 MHz by only three capacitors (ie, the first capacitor 730, the second capacitor 740, and the third capacitor 750).

Optionally, the NFMI antenna may further include a printed circuit board assembly (PCBA) hard board 430 and an FPC soft board 440, wherein the PCBA hard board 430 and the FPC soft board 440 are alternately arranged. As shown in Figure 4 and Figure 5.

By combining the NFMI antenna FPC and PCBA to form a soft and hard board, the electrical connection problem is solved.

When assembling the above-mentioned earphone, first install the FPC soft board into the ear handle, then assemble the battery, and finally weld the battery.

As shown in FIG. 10, it is a three-dimensional schematic diagram of a headset 1000 according to another embodiment of the present application. The earphone 1000 may include a horn 1010; an inner shell 1020 of the horn, which covers at least the sound emitting surface of the horn; a battery for providing power; an antenna 1030, which is electrically connected to the battery, and is used for sending or receiving signals using the power provided by the battery. The antenna 1030 includes an FPC coil 1031 which is arranged in the inner shell 1020 of the horn.

Wherein, the horn inner shell 1020 includes a first surface 1021 facing the horn 1010 and a second surface 1022 facing away from the horn 1010, and the FPC coil 1031 is attached to the second surface 1022.

It should be understood that the first surface 1021 facing the horn may be a surface close to the horn 1010. The second surface facing away from the horn 1010 may be a surface away from the horn 1010.

Wherein, the second surface 1022 of the horn inner shell 1020 where the FPC coil is attached is provided with a groove, and the FPC coil 1031 is arranged in the groove.

Optionally, the earphone 1000 may further include a front shell 1050, wherein the front shell 1050 is attached to the second surface 1022 of the speaker inner shell 1020, and the FPC coil 1031 is wrapped between the speaker inner shell 1020 and the front shell 1050 .

Optionally, a ferrite sheet 1040 is provided between the horn inner shell 1020 and the FPC coil.

Among them, the ferrite sheet 1040 includes: a convex portion 1041; a surrounding portion 1042 surrounding the convex portion 1041; and the FPC coil 1031 is attached to the surrounding portion 1042, and the convex portion is located in the closed loop formed by the FPC coil 1041 . For example, as shown in FIG. 11, a two-dimensional schematic diagram of a ferrite sheet 1040 provided by an embodiment of this application. FIG. 11(a) shows a two-dimensional view of the ferrite sheet 1040 in the xy plane. Fig. 11(b) is a two-dimensional view of the ferrite sheet 1040 in the yz plane.

For example, FIG. 12 shows a three-dimensional schematic diagram of an FPC coil 1031 attached to a ferrite sheet 1040 according to an embodiment of the application. Among them, the two coil ports of the FPC coil 1031 are 1031' and 1031" respectively. And the FPC coil 1031 is attached to the surrounding portion 1042 of the ferrite sheet 1040 around the x-axis, and the surrounding portion 1042 of the ferrite sheet 1040 surrounds Around the raised portion 1041 of the ferrite sheet 1040.

Optionally, the FPC coil 1031 can be pasted on the inner shell 1020 of the speaker by double-sided tape.

Among them, the specific design parameters of the FPC coil 1031 are: double-panel FPC thickness 181um, FPC width 1.3mm, inner circle diameter 9mm, FPC coil inductance is designed to be 1.8uH, and the corresponding operating frequency is designed to be 30MHz.

Optionally, the FPC coil 1031 includes two pads, and each pad has a coil port, and one of the two coil ports is connected to the positive pole of the circuit, and the other coil port is connected to the negative pole of the circuit. For example, in the coil port 1031' and the coil port 1032" shown in FIG. 12, one coil port is connected to the positive pole of the circuit, and the other coil port is connected to the negative pole of the circuit, that is, the coil port 1031' Connect the positive pole of the circuit, and the coil port 1032" is connected to the negative pole of the circuit; or, the coil port 1031' is connected to the negative pole of the circuit, and the coil port 1032" is connected to the positive pole of the circuit.

Optionally, the FPC coil 1031 can also be set as an air-core coil, and the air-core coil is about 10 turns of enameled wire with a diameter of 0.1 mm.

Optionally, the earphone 1000 further includes a ferrite core, which is disposed on the ferrite sheet, and the ferrite core is located in the closed loop formed by the FPC coil 1031.

By setting the ring groove on the front shell of the horn, the NFC antenna and the structural parts are used to form a whole, which avoids the influence of the NFMI antenna on the size of the whole machine. The antenna is arranged on the second surface of the inner shell of the horn. When the user wears the headset, the antenna is placed in the user's ear, that is, when the user wears, the distance between the FPC antennas of the left and right earphones is less than the width of the user's two tragus , Which reduces the earphone's requirement for NFMI receiving sensitivity. In the embodiment of the present application, the communication distance between the left and right earphones can reach 22 cm, and the width between the two tragus of 99% of adult men is less than 15.9 cm, which improves the communication effect of the earphone and helps to improve the user experience. At the same time, in the embodiments of this application, the NFMI antenna is made into an FPC antenna, and is embedded in the front shell of the speaker for assembly, without occupying additional space in the whole machine, so as to ensure that the earphone has enough headroom to meet the requirements of the layout and wiring in the earphone. .

As shown in FIG. 13, it is a three-dimensional view of a headset 1300 according to another embodiment of the application. The earphone 1300 may include a battery 1310, which is arranged in the ear handle of the earphone and formed into a column shape; the antenna 1320 includes: a spiral coil 1321 wound on at least a part of the side of the battery; a ferrite sheet 1330 is arranged on the side of the battery Between and the spiral coil.

Among them, the spiral coil 1321 is provided with two ports, namely a first port 1321' and a second port 1321".

Among them, the ferrite sheet 1330 is adhered to the battery 1310 by double-sided tape.

Among them, the spiral coil 1321 is bonded to the ferrite sheet 1330 by double-sided tape.

As shown in FIG. 14, it is a three-dimensional cross-sectional view of the internal components of the earphone 1300 provided by this embodiment of the application.

When assembling the internal components of the earphone 1300, first install the antenna 1320 into the ear handle of the semi-in-ear earphone 1300, and then insert the battery 1310 into the ear handle. And the first port 1321' of the spiral coil 1321 and the second port 1321" of the spiral coil 1321 are welded to the end of the earstalk of the earphone.

In the embodiment of the present application, the resonance of the NFMI antenna is adjusted to 15MHz, and a ferrite sheet of 0.08mm is used, so that the communication distance between the left earphone and the right earphone can reach 28cm.

As an example and not a limitation, as shown in FIG. 14, the ferrite sheet may include an area covered with a spiral coil (denoted as area A) and an area not covered with a spiral coil (denoted as area B1 and area B2) , Where the area A is located between the area B1 and the area B2. Therefore, the effect of the ferrite sheet in reducing the eddy current loss of the battery can be further improved.

As an example and not a limitation, the length of the area B1 and the area B2 in the battery height direction may be greater than a preset value, for example, the preset value may be determined according to parameters such as the battery power, the size of the spiral coil, etc., for example, the area The length of the B1 and the area B2 in the battery height direction may be greater than the length of the area A in the battery height direction.

In addition, as shown in FIG. 14, the battery may include an area covered with a ferrite sheet (denoted as area C) and an area not covered with a ferrite sheet (denoted as area D1 and area D2), in which, The area C is located between the area D1 and the area D2. Therefore, the effect of the ferrite sheet in reducing the eddy current loss of the battery can be further improved.

The above-mentioned earphone 1300 reduces the eddy current loss of the battery by wrapping the ferrite sheet on the battery, establishes a magnetic signal transmission channel, and increases the NFMI communication distance of the semi-in-ear earphone. At the same time, it also ensures that the earphone has enough headroom to satisfy The layout and wiring requirements in the headset.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A headset, characterized in that it comprises:

The battery is arranged in the ear handle of the earphone and is formed into a cylindrical body;

The antenna is electrically connected to the battery, and is used to send or receive signals using the power provided by the battery,

The antenna includes:

The flexible circuit board FPC coil, as the radiator of the antenna, is arranged on the side surface of the battery, the winding axis of the FPC coil is perpendicular to the height direction of the battery, and the side surface of the battery is unfolded The FPC coil keeps the state of the coil being wound, and is laid flat on the plane formed after the side surface is unfolded.
The earphone according to claim 1, wherein the battery is formed in a prismatic shape, and

The FPC coil is arranged on a first side surface of the battery, and the first side surface is perpendicular or approximately perpendicular to a first direction, and the first direction is the direction of the horn of the earphone.
The earphone according to claim 2, wherein the battery includes at least two side surfaces perpendicular to the first direction, and

The first side surface is a side surface located on the foremost side in the first direction among the surfaces.
The earphone according to claim 1, wherein the battery is formed in a cylindrical shape, the axis of the battery is perpendicular or approximately perpendicular to a first direction, and the first direction is the direction of the horn of the earphone, and

The FPC coil is provided on the side surface of the battery.
The earphone according to claim 4, wherein:

Wherein, the first plane divides the side surface of the battery into a first part and a second part, the first plane is a plane passing through a first diameter of the battery, and the first diameter is perpendicular or approximately to the first direction. Vertical, the first direction is the orientation of the horn of the earphone, the first part is located in front of the second part in the first direction, and

The FPC coil is provided on the first part of the side surface of the battery.
The earphone according to any one of claims 1 to 5, wherein a ferrite sheet is provided between the first side surface and the FPC coil.
The earphone according to claim 6, wherein the ferrite sheet comprises:

Bulge

A surrounding portion, surrounding the raised portion; and

The FPC coil is attached to the surrounding part, and the protruding part is located in the ring formed by the FPC coil.
The earphone according to claim 6, wherein the earphone further comprises:

The ferrite core is arranged on the ferrite sheet, and the ferrite core is located in the ring formed by the FPC coil.
A headset, characterized in that it comprises:

speaker;

The inner shell of the horn at least covers the sound emitting surface of the horn;

Batteries, used to provide electricity;

The antenna is electrically connected to the battery, and is used to send or receive signals using the power provided by the battery,

The antenna includes:

The FPC coil of the flexible circuit board, as the radiator of the antenna, is formed in a plane shape and is arranged on the inner shell of the horn.
The earphone according to claim 9, wherein:

The inner shell of the horn includes a first surface facing the horn and a second surface facing away from the horn, and

The FPC coil is attached to the second surface.
The earphone according to claim 9 or 10, wherein the second surface of the inner shell of the horn on which the FPC coil is applied is provided with a groove, and

The FPC coil is arranged in the groove.
The earphone according to any one of claims 9 to 11, wherein a ferrite sheet is provided between the inner shell of the horn and the FPC coil.
The earphone according to claim 12, wherein the ferrite sheet comprises:

Bulge

A surrounding portion, surrounding the raised portion; and

The FPC coil is attached to the surrounding part, and the protruding part is located in the closed loop formed by the FPC coil.
The earphone according to claim 12, wherein the earphone further comprises:

The ferrite core is arranged on the ferrite sheet, and the ferrite core is located in the closed loop formed by the FPC coil.
A headset, characterized in that it comprises:

The battery is arranged in the ear handle of the earphone and is formed in a cylindrical shape;

The antenna is electrically connected to the battery, and is used to send or receive signals using the power provided by the battery,

The antenna includes: a helical coil, as a radiator of the antenna, wound on the battery;

The ferrite sheet is arranged between the side surface of the battery and the spiral coil.
The earphone according to claim 15, wherein the ferrite sheet includes a first area covered with the spiral coil, and a second area and a third area not covered with the spiral coil. An area is located between the second area and the third area.
The earphone according to claim 16, wherein the length of the second area and the third area in the height direction of the battery is greater than or equal to the length of the first area in the height direction of the battery. On the length.
The earphone according to any one of claims 15 to 17, wherein the battery includes a fourth area covered with the ferrite sheet, a fifth area not covered with the ferrite sheet, and The sixth area, the fourth area is located between the fifth area and the sixth area.