Earphone

Abstract

According to the earphone provided by the invention, the first magnetic bead module is arranged between the first earphone module and the second earphone module so as to at least partially prevent the first wireless electromagnetic radiation from being emitted outwards through the wire. Furthermore, according to the earphone provided by the invention, a second magnetic bead module is arranged between the communication unit and the first movement unit, so that at least part of the second wireless electromagnetic radiation is prevented from being emitted outwards through the first ear hanging line.

Description

Technical Field

[0001] This specification relates to the field of acoustic devices, and particularly to a headphone. Background Art

[0002] During the operation of an electronic device, electromagnetic waves will be radiated outward, inevitably causing electromagnetic pollution to the surrounding environment, including radiation damage to the human body or signal interference with other electronic devices.

[0003] As a common electronic device, headphones are widely used in daily life, and the problem of electromagnetic radiation during their use has also been increasingly taken seriously. Therefore, it is necessary to provide a headphone in which the energy of the radiated electromagnetic waves is controlled within the general safety standard range.

[0004] The content of the background art section is only the information known to the inventor personally, and does not represent that the above information has entered the public domain before the filing date of this disclosure, nor does it represent that it can become the prior art of this disclosure. Summary of the Invention

[0005] This specification provides a headphone that can effectively block the external radiation of electromagnetic waves.

[0006] In a first aspect, the present application provides a headphone, including a first headphone module including a data transmission unit that performs wired transmission of target data with the outside world when working; a second headphone module electrically connected to the first headphone module through a wire; and a first magnetic bead module disposed between the first headphone module and the second headphone module to at least partially block the first wireless electromagnetic radiation emitted outward at the wire due to the wired transmission.

[0007] In some implementations, the ratio of the wavelength of the first wireless electromagnetic radiation to the length of the wire is in the range of 3.7 to 4.3.

[0008] In some implementations, the frequency of the first wireless electromagnetic radiation is in the range of 220 MHz to 260 MHz, and the length of the wire is in the range of 27 cm to 37 cm.

[0009] In some implementations, the first magnetic bead module includes at least one magnetic bead, and the impedance of the at least one magnetic bead reaches a peak in the frequency range of 220 MHz to 800 MHz.

[0010] In some implementations, the data transmission unit includes: a data transmission interface; a memory for storing the target data; and a data input / output circuit electrically connected to the data transmission interface and the memory, where at least part of the data input / output circuit is covered with a signal shield to at least partially block the external radiation generated during the wired transmission of the target data. Among them, the wired transmission of the target data includes: the data input / output circuit wiredly receives the target data sent from the outside through the data transmission interface, or wiredly sends the target data to the outside through the data transmission interface.

[0011] In some implementations, the first earphone module includes a communication unit and a first movement unit; the second earphone module includes a power supply unit and a second movement unit; and the first magnetic bead module is connected to the communication unit to at least partially block at least part of the first wireless electromagnetic radiation generated by the clock signal generated by the communication unit in the wire.

[0012] In some implementations, the second earphone module further includes a power supply temperature detector and a button; the communication unit includes at least one of a power supply interface, a power supply temperature detection signal interface, a button signal interface, or a second speaker data interface; and the first magnetic bead module includes at least one of a first magnetic bead unit, a second magnetic bead unit, a third magnetic bead unit, or a fourth magnetic bead unit. Among them, the first magnetic bead unit is connected to the power supply unit through the power supply interface, the second magnetic bead unit is connected to the power supply temperature detector through the power supply temperature detection signal interface, the third magnetic bead unit is connected to the button through the button signal interface, and the fourth magnetic bead unit is connected to the second movement unit through the second speaker data interface.

[0013] In some implementations, the power supply interface includes a power supply positive interface and a power supply ground interface; the second speaker data interface includes a second speaker data positive interface and a second speaker data negative interface. Among them, at least one bead in the first magnetic bead unit is connected to the power supply positive interface, at least one bead in the first magnetic bead unit is connected to the power supply ground interface, at least one bead in the fourth magnetic bead unit is connected to the second speaker data positive interface, and at least one bead in the fourth magnetic bead unit is connected to the second speaker data negative interface.

[0014] In some implementations, the power supply unit includes a battery; the communication unit and the first movement unit are connected by a first earhook wire; the power supply unit and the second movement unit are connected by a second earhook wire; and the earphone further includes a second bead module disposed between the communication unit and the first movement unit to at least partially block the second wireless electromagnetic radiation of the harmonic signal of the clock signal from being emitted outward through the first earhook wire; the first earphone module further includes at least one of a first microphone or a second microphone; the communication unit further includes at least one of a first microphone interface, a second microphone interface, or a first speaker data interface; and the second bead module includes at least one of a fifth bead unit, a sixth bead unit, or a seventh bead unit, wherein the fifth bead unit is connected to the first microphone through the first microphone interface, the sixth bead unit is connected to the second microphone through the second microphone interface, and the seventh bead unit is connected to the first movement unit through the first speaker data interface.

[0015] In some implementations, the earphone further includes a connecting portion to connect the first earphone module and the second earphone module, and the connecting portion includes: an elastic bracket; a wire extending along the elastic bracket; and an insulating outer skin wrapping the elastic bracket and the wire.

[0016] As can be seen from the above technical solutions, the earphone provided in this specification is provided with a first bead module between the first earphone module and the second earphone module, and the first bead module has at least a partial blocking effect on signals in a specific frequency band. When target data transmission is performed in the first earphone module, the first wireless electromagnetic radiation generated during the target data transmission falls within the frequency band range. The first bead module can at least partially block the propagation of the first wireless electromagnetic radiation outward through the wire connecting the two earphone modules. Further, the earphone provided in this specification is provided with a second bead module between the communication unit of the first earphone module and the first movement unit, and the second bead module has a blocking effect on signals in a specific frequency band to form at least a partial blocking effect on the second wireless electromagnetic radiation, preventing the second wireless electromagnetic radiation from being propagated outward through the first earhook wire connecting the communication unit and the first movement unit.

[0017] Other functions of the earphone provided in this specification will be partially listed in the following description. According to the description, the content introduced by the following numbers and examples will be obvious to those of ordinary skill in the art. The creative aspects of the earphone provided in this specification can be fully explained by practicing or using the methods, devices, and combinations provided in the following detailed examples. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of this specification, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this specification. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 Shows a schematic structural diagram of an earphone provided according to some embodiments of this specification;

[0020] Figure 2 Shows an exploded view of the connection part of an earphone provided according to some embodiments of this specification;

[0021] Figure 3 Shows a schematic diagram of the modules of an earphone provided according to some embodiments of this specification;

[0022] Figure 4 Shows a schematic diagram of the modules of an earphone provided according to some embodiments of this specification;

[0023] Figure 5 Shows a schematic diagram of the impedance-frequency curve of a magnetic bead provided according to some embodiments of this specification;

[0024] Figure 6 Shows a connection schematic diagram of a first magnetic bead module provided according to some embodiments of this specification;

[0025] Figure 7 Shows a connection schematic diagram of a second magnetic bead module provided according to some embodiments of this specification; and

[0026] Figure 8 Shows a comparative test diagram of an earphone provided according to some embodiments of this specification. Detailed implementation manners

[0027] The following description provides specific application scenarios and requirements of this specification, aiming to enable those skilled in the art to manufacture and use the content in this specification. For those skilled in the art, various partial modifications to the disclosed embodiments are obvious, and the general principles defined here can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the shown embodiments, but has the broadest scope consistent with the claims.

[0028] The terms used herein are for the purpose of describing particular example embodiments only and are not limiting. For example, unless the context clearly dictates otherwise, as used herein, the singular forms "a", "an" and "the" may also include the plural forms. When used in this specification, the terms "comprising", "including" and / or "having" mean that the associated integers, steps, operations, elements and / or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups in the system / method.

[0029] In view of the following description, these and other features of the present specification, as well as the operations and functions of the related elements of the structure, and the combination and manufacturing economy of the components can be significantly improved. Referring to the accompanying drawings, all of which form a part of this specification. However, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0030] The flowcharts used in this specification illustrate the operations implemented by the system according to some embodiments of this specification. It should be clearly understood that the operations of the flowchart may not be implemented in sequence. On the contrary, the operations may be implemented in reverse order or simultaneously. In addition, one or more other operations may be added to the flowchart. One or more operations may be removed from the flowchart.

[0031] In this specification, the expression "X includes at least one of A, B or C" means that X includes at least A, or X includes at least B, or X includes at least C. That is, X may include only any one of A, B, C, or may include any combination of A, B, C and other possible contents / elements at the same time. Any combination of A, B, C may be A, B, C, AB, AC, BC, or ABC.

[0032] In this specification, unless otherwise clearly stated, the associated relationships generated between structures may be direct or indirect. For example, when describing "A is connected to B", unless it is clearly stated that A is directly connected to B, it should be understood that A may be directly connected to B or indirectly connected to B; for another example, when describing "A is above B", unless it is clearly stated that A is directly above B (A and B are adjacent and A is above B), it should be understood that A may be directly above B or A may be indirectly above B (there are other elements between A and B and A is above B). And so on.

[0033] For ease of understanding, before describing some embodiments provided in this specification, the following introduction to the relevant background is given:

[0034] When an electronic device is operating, the changing electric fields in the cable wires and components will form a changing magnetic field around them, and the changing magnetic field can in turn induce a changing electric field. The two influence and stimulate each other, and then radiate electromagnetic waves outward. Electromagnetic waves can be transmitted through physical conductors, that is, conduction propagation. Electromagnetic waves can also be transmitted through space, that is, electromagnetic radiation. Different frequencies of electromagnetic waves have different transmission distances in space. Theoretically speaking, the higher the frequency of the electromagnetic wave, the more electromagnetic energy it contains, and the farther the propagation distance. Or rather, the higher the frequency of the electromagnetic wave, the higher the average power density or electromagnetic field intensity at the same distance.

[0035] When an electronic device radiates electromagnetic waves, if there are electromagnetic waves of a specific wavelength that have a certain proportional relationship with the size of the cable wires or components in the circuit system, the radiation range of the electromagnetic waves will be further expanded. For example, when the length of the cable wire is half or a quarter of the wavelength of the electromagnetic wave, the cable wire will be equivalent to an antenna and emit the electromagnetic waves into a wider range. And electromagnetic radiation may cause problems such as crosstalk and electromagnetic compatibility in the electronic system, and some may cause damage to the human body or the environment. Therefore, in the process of circuit design of electronic devices, especially in the design of high-speed circuits, it is necessary to consider the possible electromagnetic radiation and suppress the outward propagation of electromagnetic radiation as much as possible.

[0036] Next, the earphone provided in this specification will be described in detail.

[0037] The earphone provided in this specification can be an earphone in any form. For example, the earphone can be a wired earphone. The receiver in the wired earphone can receive the electrical signal sent from the media player through a wired transmission method, and then convert the electrical signal into sound waves that can be heard by the human ear. For example, the earphone can be a wireless earphone. The receiver in the wireless earphone can receive the electrical signal sent from the media player through a wireless transmission method, and then convert the electrical signal into sound waves that can be heard by the human ear. For another example, the earphone can be a bone conduction earphone. The bone conduction earphone can convert the electrical signal into a mechanical vibration signal. The mechanical vibration signal can cause the vibration of the skull, make the perilymph generate fluctuations of the same frequency, and stimulate the spiral organ of the cochlea to produce hearing. For another example, the earphone can be a combination of a bone conduction earphone and an air conduction earphone. This specification does not limit the type of the earphone.

[0038] For wired and wireless earphones, "wired" and "wireless" refer to whether the data transmission method between the earphone and the media player during music playback is wired or wireless. A wired earphone needs to transmit and play audio data in real time through the connection cable. A wireless earphone, on the other hand, uses a wireless signal, such as Bluetooth, to connect to the media player and wirelessly transmit audio data. In addition to the music playback scenario, at other times, users may need to import target data, such as audio data, into the built-in memory of the earphone through a transmission line for storage. The wired transmission here has nothing to do with whether the earphone is a wired earphone or a wireless earphone mentioned above. That is to say, both wired and wireless earphones can be configured with the function of wired data transmission and storage.

[0039] The earphone provided in this specification can achieve the transmission and storage of target data. Figure 1 The schematic structural diagram of the earphone 001 provided according to some embodiments of this specification is shown. The earphone 001 may include a first earphone module 100, a second earphone module 200, and a connection part 300 connecting the first earphone module 100 and the second earphone module 200.

[0040] The first and second earphone modules 100 and 200 each include at least one movement unit 130 and 230 for converting an electrical signal into a sound wave that a person can hear. In addition, the first and second earphone modules 100 and 200 also include other accessory devices 110 and 210, such as a main control board module or a battery module, etc. The first movement unit 130 and its accessory device 110 can be respectively arranged at different positions of the earphone 001, or can be integrated together and placed in a bin; similarly, the second movement unit 230 and its accessory device 210 can be respectively arranged at different positions of the earphone 001, or can be integrated together and placed in a bin. Figure 1 What is shown is the case where the movement units 130 and 230 and their accessory devices 110 and 210 can be respectively arranged at different positions of the earphone 001. At this time, the movement units 130 and 230 and their accessory devices 110 and 210 are respectively connected by a first ear hook wire 120 and a second ear hook wire 220.

[0041] The first earphone module 100 or the second earphone module 200 includes a data transmission unit that can perform wired transmission and storage of target data. For example, the earphone 001 can include the function of playing MP3 audio, and the first earphone module 100 or the second earphone module 200 includes an MP3 player. The MP3 player includes a memory for MP3 data and a data interface for wired transmission of MP3 files from a third-party data source, such as a USB interface, etc. Of course, the earphone 001 can also include other functions, and the corresponding modules can be classified as data transmission units for performing wired transmission and storage of target data, which is not limited in this specification.

[0042] In this specification, the case where the data transmission unit is located in the first earphone module 100 will be taken as an example for illustration.

[0043] It should be noted that although in Figure 1 the shown earphone 001, the first earphone module 100 is for wearing on the right ear and the second earphone module 200 is for wearing on the left ear, it should be understood that the relative positions of the first earphone module 100 and the second earphone module 200 are not limited by the wearing method. That is, in some embodiments, the module for wearing on the left ear can be the first earphone module 100, and the module for wearing on the right ear can be the second earphone module 200.

[0044] As Figure 1 shown, the connecting part 300 is used to connect the first earphone module 100 and the second earphone module 200. Figure 2 The exploded view of the connecting part of the earphone 001 provided according to some embodiments of this specification is shown. The connecting part 300 can include an elastic bracket 320, a wire 310, and an insulating outer skin 330.

[0045] The elastic bracket 320 can adopt an arc design to provide a certain clamping force for the user when wearing the earphone. For example, when the user wears the earphone, the two earphone modules can be respectively hung on the outer sides of the user's two ears, and the connecting part is wound around the back of the user's head. The clamping force provided by the elastic bracket 320 enables the two earphone modules to closely adhere to the user's skin, thereby improving the wearing reliability. In some embodiments, the elastic bracket 320 can be an elastic metal wire. In some embodiments, the elastic bracket 320 can be an elastic plastic bracket. In some embodiments, the elastic bracket can be an elastic polymer material bracket. This specification does not limit the material of the elastic bracket 320.

[0046] The wire 310 can extend along the elastic bracket 320, and the two ends of the elastic bracket 320 are respectively connected to the first earphone module 100 and the second earphone module 200. The wire 310 can be used to achieve electrical connection between the electronic components of the two earphone modules. The wire 310 can be provided with one or more strands according to the circuit connection requirements. For example, the wire 310 can be set to any number of strands such as 1 strand, 2 strands, 3 strands, 5 strands, 6 strands, 8 strands, etc. The length of the wire 310 is determined according to the actual appearance or functional design requirements of the earphone product. For example, the earphone should have good wearing stability or wearing comfort. For example, in some earphones, the length of the wire 310 is in the range of 27 cm to 37 cm. In some embodiments, the earphone 001 is a head-mounted earphone, and the length of the wire 310 can be determined according to the length of the connecting part wound around the upper side of the head of an average user when worn. In some embodiments, the earphone 001 is a behind-the-neck earphone, and the length of the wire 310 can be determined according to the length of the connecting part wound around the back side of the head of an average user when worn. The average user can be a user who provides usage experience or data for product design or testing. The average user can be a real person or a virtual character.

[0047] The insulating outer skin 330 can wrap the elastic bracket 320 and the wire 310. The insulating outer skin can achieve the encapsulation of the elastic bracket 320 and the wire 310, meeting product requirements such as anti-electric leakage and waterproofing. The insulating outer skin 330 can be integrally formed or composed of multiple spliced insulating outer skins. The insulating outer skin 330 can be made of a soft material with certain elasticity, such as soft silicone, rubber, etc.

[0048] As described above, the earphone 001 provided in this specification includes a data interface, which can connect to a data cable and import target data from an external device into the memory in the earphone 001 through the data cable. With the development of interface technology, the speed of data transmission is constantly increasing. This means that when the earphone 001 performs high-speed data transmission, there will be high-frequency clock signals in the earphone 001. In different technical fields, the definition of high frequency is different. In the definition of high-speed circuits, when the clock frequency in an electronic system reaches or exceeds 50 MHz, the circuit system is a high-speed circuit, and the clock frequency can be considered high frequency. The high frequency mentioned in this specification can refer to this definition. High-frequency signals can bring many problems to the circuit system. For example, the electromagnetic radiation generated by high-frequency signals may cause crosstalk inside the circuit system, resulting in timing errors or affecting the sensitivity of components. Sometimes, the electromagnetic radiation generated by high-frequency signals radiates outward, causing electromagnetic interference to other electronic devices. For example, the electromagnetic waves radiated by high-frequency signals contain harmonic components with higher frequencies, and these higher-frequency harmonics are more likely to be emitted outward through cable lines or interfaces.

[0049] In view of this, the earphone 001 provided in this specification is provided with a high-frequency suppression device in the circuit to suppress the electromagnetic waves generated by high-frequency signals from propagating outward through the cable or interface. Figure 3 FIG. Figure 3 shows a schematic diagram of the modules of the earphone 001 provided according to some embodiments of this specification. The earphone 001 provided in this specification is provided with a first magnetic bead module 400 between the first earphone module 100 and the second earphone module 200. The first magnetic bead module 400 has an attenuation effect on electromagnetic waves in a specific frequency band. When target data transmission is performed in the first earphone module 100, the first wireless electromagnetic radiation generated during the target data transmission falls within a specific frequency band range. The first magnetic bead module 400 can suppress the first wireless electromagnetic radiation, so that the electromagnetic energy of the first wireless electromagnetic radiation decreases after passing through the first magnetic bead module 400, thereby suppressing the first wireless electromagnetic radiation from propagating outward through the wire 310.

[0050] The following will Figure 4 describe in detail the module structure of the earphone 001 provided in this specification.

[0051] Figure 4 FIG. shows a schematic diagram of the modules of the earphone 001 provided according to some embodiments of this specification. The first earphone module 100 may include a communication unit 111. In some embodiments, the communication unit 111 can receive and transmit wireless signals. For example, it can communicate with an external media player or a master device by at least one of Bluetooth, NFC, or Wifi. In some embodiments, the communication unit 111 can communicate with the master device in a wired manner. In some embodiments, the communication unit 111 can perform audio data decoding or digital-to-analog conversion. In some embodiments, the communication unit 111 can receive and play the audio data sent by an external media player through a Bluetooth antenna, that is, play music through a Bluetooth connection.

[0052] In some embodiments, the communication unit 111 may include a control element, the communication unit 111 may include a power amplifier element, and the control element and the power amplifier element are electrically connected. The control element may be a microprocessor. The microprocessor can send control signals to external devices. In some embodiments, the microprocessor can synchronize clock signals with external devices. The external devices may include I / O devices electrically connected to the microprocessor, such as storage devices. The microprocessor can read and process the data in the storage device. The power amplifier element is used to amplify the received audio electrical signal so that the sound can be heard by people. The control element can send control signals to the power amplifier element, and the control element can also send audio electrical signals to the power amplifier element.

[0053] As Figure 4As shown, the first headphone module 100 may include a first movement unit 130. The first movement unit 130 and the communication unit 111 are connected by a first earhook wire 120. The first movement unit 130 may include a first speaker, and the first speaker may convert an electrical signal into sound waves that can be heard by a person. The first earhook wire 120 may include a first speaker data wire connecting the power amplifier element and the first speaker of the first movement unit 130. After the voice electrical signal is power-amplified by the power amplifier element, it is transmitted to the first speaker along the first speaker data wire. The first speaker data wire may include a first speaker data positive wire and a first speaker data negative wire.

[0054] As Figure 4 shown, the first movement unit 130 may include a first microphone. The first microphone and the communication unit 111 are connected by the first earhook wire 120. In some embodiments, the first microphone is the main microphone, and the main microphone may be used to pick up the speaking voice during a call and collect ambient sound signals. The first earhook wire 120 may include a first microphone data wire connecting the control element and the first microphone. The first microphone data wire may include a first microphone data positive wire and a first microphone data negative wire. The first earhook wire 120 may include a microphone power wire for powering the first microphone. The microphone power wire includes a microphone power positive wire and a microphone power ground wire. The first movement unit 130 may further include a second microphone. The second microphone and the communication unit 111 are connected by the first earhook wire 120. In some embodiments, the second microphone is a secondary microphone, and the secondary microphone may be used to collect ambient sound signals and form a front and back feed structure with the main microphone to reduce noise of the ambient sound. The first earhook wire may include a second microphone data wire connecting the control element and the second microphone. The second microphone power wire may include a second microphone data positive wire and a second microphone data negative wire.

[0055] As Figure 4 shown, the accessory device 110 of the first headphone module 100 may be a module for placing the main control circuit of the earphone 001. For example, the accessory device 110 includes devices such as the main board of the earphone. Figure 4 It is shown that the accessory device 110 may include a data transmission unit 112, a communication unit 111, a first bead module 400, and a second bead module 500.

[0056] When the data transmission unit 112 operates, it conducts wired transmission of target data with the outside world. The target data can be audio data. The data transmission unit 112 is electrically connected to the communication unit 111. The data transmission unit 112 can receive the control signal sent by the communication unit 111. In some embodiments, the control signal can be a switch signal for controlling the data transmission unit 112 to start data transmission. In some embodiments, the control signal can be a clock signal for signal synchronization between the communication unit 111 and the data transmission unit 112. The data transmission unit 112 can send a data signal to the communication unit 111. In some embodiments, the data signal can be a 1-bit data signal. The data transmission unit 112 can include a data transmission interface, a memory, and a data input / output circuit. The wired transmission of the target data can include the data input / output circuit receiving the target data sent by the outside world through the data transmission interface in a wired manner, or sending the target data to the outside world through the data transmission interface in a wired manner.

[0057] To conduct the wired transmission of the target data, the data transmission unit 112 can include a data transmission interface. The data transmission interface provides a standard interface for wired connection with external devices. External devices can exchange target data with the data transmission interface through a connecting wire or a connector. In some embodiments, the data transmission interface can be a USB (Universal Serial Bus, a serial bus standard) interface. In some embodiments, the USB interface can be a micro USB interface. In some embodiments, the USB interface can be a type-C interface. In some embodiments, the USB interface can be a USB2.0 interface. The data transmission rate of the USB2.0 interface can be 480 Mbps (bps, bit per second, the unit of bit rate). Since USB2.0 adopts non-return-to-zero inverted encoding and transmits 2 bits of data per clock cycle, that is, when the data transmission rate is 480 Mbps, the corresponding clock frequency is 240 MHz (Hz, Hertz, the unit of frequency). In some embodiments, the control element of the communication unit can provide a clock signal of 240 MHz.

[0058] To store the target data received from a third-party data source, the data transmission unit 112 can further include a memory. The memory can store the target data. The earphone provided in this specification can play the target audio data stored in the built-in memory when it does not conduct signal transmission with an external media player. In some embodiments, the memory can be an eMMC, an SSD, or a UFS, etc.

[0059] The data transmission unit 112 may further include a data input / output circuit. The data input / output circuit is electrically connected to the data transmission interface and the memory, and is configured to input target data from the data transmission interface to the memory, or output target data from the memory to the data transmission interface. The data transmission unit 112 is electrically connected to the communication unit 111 to receive control signals from the communication unit 111. The control signals may include an enable signal and may also include a clock signal. In some embodiments, the frequency of the clock signal is 240 MHz, and the data input / output circuit transmits data at a rate of 2 bits per clock cycle. In some embodiments, the 240-MHz clock signal may be obtained by multiplying the fundamental clock signal of the communication unit, and the frequency of the fundamental clock signal of the communication unit may be 24 MHz, 48 MHz, etc. Since the data input / output circuit maintains high-speed data signal changes during data transmission, it will also radiate electromagnetic waves externally through the surface of the components or the interface. Therefore, in some embodiments, the earphone further includes a signal shield. The signal shield covers at least part of the data input / output circuit to at least partially block the external radiation generated during the wired transmission of target data.

[0060] For the earphone 001 provided in this specification, when the data transmission unit 112 performs wired transmission of target data through the data transmission interface, the data transmission unit may receive a clock signal for data synchronization sent by the communication unit 111. The communication unit 111 may generate a high-frequency clock signal that matches the data transmission interface standard. When performing wired data transmission through the data transmission unit 112, high-frequency signals exist in at least the circuits of the communication unit 111 and the data transmission unit 112 in the entire circuit system. The high-frequency signals may include a clock signal for data synchronization and may include a target data signal for high-speed transmission. Among them, the signal with the highest energy is the synchronization clock signal. In some embodiments, when the earphone 001 uses a USB2.0 data transmission interface for high-speed data transmission, the frequency of the clock signal is 240 MHz. The clock signal may radiate electromagnetic waves outward through the cable, the wiring on the printed circuit board, or the solder joints, and the energy of the electromagnetic waves is mainly concentrated at 240 MHz.

[0061] As described above, the length of the wire 310 of the earphone 001 provided in this specification is 27 cm to 37 cm. When wired transmission of target data occurs, at least part of the first wireless electromagnetic radiation in the circuit may enter the wire 310 through the connection part between the wire 210 and the communication unit 111. The frequency of the first wireless electromagnetic radiation is in the range of 220 MHz to 260 MHz. According to the wavelength calculation formula:

[0062]

[0063] Among them, λ is the wavelength, c is the speed of light, and f is the frequency of the wave. The wavelength corresponding to the first wireless electromagnetic radiation is from 1.15 meters to 1.36 meters. The ratio of the wavelength of the first wireless electromagnetic radiation to the length of the wire is from 3.7 to 4.3. According to the antenna principle, when the ratio of the wavelength of the first wireless electromagnetic radiation to the length of the wire 310 is approximately 4, the wire 310 can just become an equivalent antenna, which can transmit the first wireless electromagnetic radiation to a farther space range, thus causing electromagnetic interference in a larger range. The center frequency of the first wireless electromagnetic radiation is approximately 240 MHz, and the wavelength corresponding to the center frequency is 1.25 meters. When the length of the wire 310 is 31.25 cm, the propagation effect on the first wireless electromagnetic radiation is more obvious.

[0064] Therefore, this specification provides a headset 001 that attenuates the first wireless electromagnetic radiation before it is emitted outward through the wire 310, so as to reduce the emission energy of the first wireless electromagnetic radiation by the wire 310 as an equivalent antenna. As Figure 4 shown, the headset 001 includes a first magnetic bead module 400. The first magnetic bead module 400 is disposed between the first headset module 100 and the second headset module 200 to at least partially block the outward emission of the first wireless electromagnetic radiation at the wire 310 caused by the wired transmission of the target data.

[0065] For the convenience of subsequent description, before introducing the first magnetic bead module 400 in detail, the second headset module 200 will be introduced first.

[0066] As Figure 4 shown, the second headset module 200 may include a power supply unit 210. The power supply unit can supply power to the active devices in the headset 001. There is at least a power line connected between the power supply unit and the communication unit 111. The power line includes a power positive line and a power ground line. The wire 310 may include a power line. The power supply unit 210 may include a battery. In some embodiments, the battery may be a rechargeable battery. The rechargeable battery can be charged through a charging interface and can supply power outward through the power cable connected to it.

[0067] The power supply unit 210 may include a power temperature detector. The power temperature detector is electrically connected to the communication unit 111 to transmit the temperature signal of the power supply unit to the communication unit 111. There is at least a power temperature detection signal line connected between the power temperature detector and the communication unit 111. The wire 310 may include a power temperature detection signal line. The power temperature detector detects the temperature condition of the power supply by showing different element characteristics at different temperatures through a temperature sensor. In some embodiments, the temperature sensor may be a thermistor. In some embodiments, the second movement unit 230 and the power supply unit are connected by a second ear hook wire 220.

[0068] AsFigure 4 As shown, the second earphone module 200 may include a second core unit 230. The second core unit 230 may include a second speaker, and the second speaker may convert the electrical signal into sound waves that can be heard by humans.

[0069] The wire 310 may include a second speaker data line, and the power amplifier element and the second core unit 230 are connected through the second speaker data line. After the sound electrical signal is amplified by the power amplifier element, it is transmitted to the second core unit 230 along the second speaker data line. The second speaker data line may include a second speaker data positive line and a second speaker data negative line. The second ear hook line 220 may include a second speaker data line. The second speaker data line may be switched through an adapter located in the second earphone module. The second speaker data line may include a second speaker data positive line and a second speaker data negative line.

[0070] The second earphone module 200 may further include at least one button. The at least one button may be operated by a user to control the earphone to realize key functions such as turning on, turning off, adjusting the volume, or switching modes. The at least one button may receive a user operation and convert it into a key electrical signal. The key electrical signal may be transmitted to the communication unit via a key signal line to realize the key function. The wire may include a key signal line connected between at least one button and the communication unit, and the key signal line may be one or more.

[0071] As mentioned above, the earphone 001 provided in this specification is provided with a first magnetic bead module 400 between the first earphone module 100 and the second earphone module 200 to completely or partially suppress the first wireless electromagnetic radiation. The first magnetic bead module includes at least one magnetic bead, and at least one magnetic bead should have a good inhibitory effect on the first wireless electromagnetic radiation. Figure 5 A schematic diagram of a magnetic bead impedance-frequency curve provided according to some embodiments of the present specification is shown. The horizontal coordinate of the curve is the frequency, and the vertical coordinate is the impedance value, wherein Z=R+jX, Z is the modulus of the impedance, R is the real part of the impedance, i.e., the resistance, and X is the imaginary part of the impedance, i.e., the reactance. At low frequencies, the impedance value of the magnetic beads is small, and as the frequency increases, the magnetic beads gradually show resistance, and at the impedance peak point, they show complete resistance characteristics. The impedance of at least one magnetic bead reaches a peak value in the frequency range of 220MHz to 800MHz. Since the magnetic beads have an inhibitory effect on high-frequency signals in a specific frequency band and have little effect on low-frequency signals, this characteristic of the magnetic beads can be used to attenuate the first wireless electromagnetic radiation without affecting the passage of the audio signal. In some embodiments, the magnetic beads can be ferrite beads. In some embodiments, the magnetic beads can be annular magnetic beads or sheet magnetic beads. The annular magnetic beads can be sleeved on the cable line, and the sheet magnetic beads can be welded on the circuit board.

[0072] Figure 6 The connection diagram of the first magnetic bead module 400 provided according to some embodiments of this specification is shown. The communication unit 111 of the first earphone module 100 can be connected to the wire 310 through a series of interfaces 111-A, so as to realize the electrical connection between the first earphone module 100 and the second earphone module 200. The first magnetic bead module 400 is connected to the communication unit 111, and the first magnetic bead module 400 includes at least one of a first magnetic bead unit 410, a second magnetic bead unit 420, a third magnetic bead unit 430, or a fourth magnetic bead unit 440.

[0073] The communication unit 111 may include a power interface, and the power interface includes a power positive interface and a power ground interface. The power positive interface is connected to the power positive line, and the power ground interface is connected to the power ground line. The first magnetic bead unit 410 is connected to the power unit through the power interface. At least one bead 411 in the first magnetic bead unit 410 is connected to the power positive interface, and at least one bead 413 in the first magnetic bead unit 410 is connected to the power ground interface. The first magnetic bead unit 410 can prevent the first wireless electromagnetic radiation from entering the wire 310 through the power interface.

[0074] The communication unit 111 may include a power temperature detection signal interface. The power temperature detection signal interface is connected to the power temperature detection signal line for connecting the signal between the communication unit 111 and the power temperature detector. The second magnetic bead unit 420 is connected to the power temperature detector through the power temperature detection signal interface to prevent the first wireless electromagnetic radiation from entering the wire 310 through the power temperature detection signal interface.

[0075] The communication unit 111 may include a key signal interface. The key signal interface is connected to the key signal line for connecting the signal between the communication unit 111 and the key. The third magnetic bead unit 430 is connected to the key through the key signal interface to prevent the first wireless electromagnetic radiation from entering the wire 310 through the key signal interface.

[0076] The communication unit 111 may include a second speaker data interface, and the second speaker data interface may include a second speaker data positive interface and a second speaker data negative interface. The second speaker data positive interface is connected to the second speaker data positive line, and the second speaker data negative interface is connected to the second speaker data negative line for connecting the signal between the communication unit 111 and the second movement unit 230. The fourth magnetic bead unit 440 is connected to the second movement unit 230 through the second speaker data interface. At least one bead 441 in the fourth magnetic bead unit 440 is connected to the second speaker data positive interface, and at least one bead 443 in the fourth magnetic bead unit is connected to the second speaker data negative interface to prevent the first wireless electromagnetic radiation from entering the wire 310 through the second speaker data interface.

[0077] As described above, the communication unit 111 may include a control element and a power amplifier element. The control element is connected to at least one of a power supply interface, a power supply temperature detection signal interface, or a key signal interface through a first bead module 400. The power amplifier element is connected to a second speaker data interface through the first bead module 400.

[0078] In summary, the earphone 001 provided in this specification can exchange target data with the outside world through wired transmission. During the wired transmission process, the communication unit 111 will generate a high-frequency clock signal, and the high-frequency clock signal and the high-speed target data signal will form a high-frequency electromagnetic radiation and propagate in the circuit. The length of the wire 310 of the earphone 001 is approximately 1 / 4 of the wavelength of the clock signal, which can form an equivalent antenna to transmit the first wireless electromagnetic radiation outward. Therefore, the earphone 001 provided in this specification is provided with a first bead module 400 between the first earphone module 100 and the second earphone module 200 to at least partially block at least part of the first wireless electromagnetic radiation generated by the wire 310 caused by the clock signal generated by the communication unit 111.

[0079] Furthermore, the frequency of the electromagnetic radiation caused by the high-frequency clock signal does not only include the clock frequency, but also includes rich harmonic components, and the frequency of the harmonics is an integer multiple of the clock frequency. This means that there is also a second wireless electromagnetic radiation with a higher frequency in the circuit. For the second wireless electromagnetic radiation, the first earhook wire 120 with a length shorter than that of the wire 310 becomes its possible 1 / 4 wavelength equivalent antenna. If the second wireless electromagnetic radiation is not suppressed before it enters the first earhook wire 120, the second wireless electromagnetic radiation may be emitted outward with the first earhook wire 120 as the antenna.

[0080] In view of this, the earphone 001 provided in this specification further includes a second bead module 500. The second bead module 500 is disposed between the communication unit 111 and the first movement unit 130 to at least partially block the second wireless electromagnetic radiation generated by the clock signal and / or its harmonic signals through the first earhook wire 120. The second bead module includes at least one bead, and the impedance of at least one bead reaches a peak in the frequency range of 220 MHz to 800 MHz. For a 240 MHz clock signal, the harmonic component with the highest energy is 720 MHz. The beads of the second bead unit have a good suppression effect on the second wireless electromagnetic radiation of 720 MHz.

[0081] Figure 7Shows a connection schematic diagram of the second magnetic bead module 500 provided according to some embodiments of the present specification. The communication unit 111 of the first earphone module 100 can be connected to other components of the first earphone module 100 through a series of interfaces 111-B, thereby realizing the electrical connection between the components inside the first earphone module 100. The second magnetic bead module 500 includes at least one of a fifth magnetic bead unit 55, a sixth magnetic bead unit 560, or a seventh magnetic bead unit 570.

[0082] The communication unit 111 may further include a first microphone interface. The first microphone interface includes a microphone power supply positive electrode interface, a microphone power supply ground interface, a first microphone data positive electrode interface, and a first microphone data negative electrode interface. The microphone power supply positive electrode interface is connected to the microphone positive wire, the microphone power supply ground interface is connected to the microphone negative wire, the first microphone data positive electrode interface is connected to the first microphone data positive wire, and the first microphone data negative electrode interface is connected to the first microphone data negative wire, for connecting the power supply and signals between the first microphone and the communication unit 111. The fifth magnetic bead unit 550 is connected to the first microphone through the first microphone interface. At least the bead 551 in the fifth magnetic bead unit 550 is connected to the microphone power supply positive electrode interface, the bead 553 is connected to the microphone power supply ground interface, the bead 555 is connected to the first microphone data positive electrode interface, and the bead 557 is connected to the first microphone data negative electrode interface, to block or partially impede the second wireless electromagnetic radiation from entering the first earhook wire 120 through the first microphone interface.

[0083] The communication unit 111 may further include a second microphone interface. The second microphone interface includes a second microphone data positive electrode interface and a second microphone data negative electrode interface. The second microphone data positive electrode interface is connected to the second microphone data positive wire, and the second microphone data negative electrode interface is connected to the second microphone data negative wire, for connecting the signals between the second microphone and the communication unit. The sixth magnetic bead unit 560 is connected to the second microphone through the second microphone interface. At least one bead 561 in the sixth magnetic bead unit 560 is connected to the second microphone data positive electrode interface, and at least one bead 563 in the sixth magnetic bead unit 560 is connected to the second microphone data negative electrode interface, to impede the second wireless electromagnetic radiation from entering the first earhook wire 120 through the second microphone interface.

[0084] The communication unit 111 may further include a first speaker data interface, which includes a first speaker data positive interface and a first speaker data negative interface. The first speaker data positive interface is connected to a first speaker data positive line, and the first speaker data negative interface is connected to a first speaker data negative line. The seventh bead unit 570 is connected to the first movement unit 130 through the first speaker data interface. At least one bead 571 in the seventh bead unit 570 is connected to the first speaker data positive interface, and at least one bead 573 in the seventh bead unit 570 is connected to the first speaker data negative interface to prevent the second wireless electromagnetic radiation from entering the first earhook wire 120 through the first speaker data interface.

[0085] As described above, the communication unit 111 may include a control element and a power amplifier element. The control element is connected to at least one of the first microphone interface or the second microphone interface through the second bead module 500. The power amplifier element is connected to the first speaker data interface through the second bead module 500.

[0086] In summary, the high-frequency clock signal generated during the wired transmission of target data by the earphone 001 provided in this specification not only radiates electromagnetic waves with the same frequency as it, but also radiates a set of harmonics whose frequencies are in a multiple relationship with it. For higher-frequency harmonics, the shorter first earhook wire 120 may become an antenna for its external emission. Therefore, the earphone provided in this specification is provided with a second bead module 500 between the communication unit and the first movement unit to at least partially block the harmonic signal of the clock signal from emitting the second wireless electromagnetic radiation outward through the first earhook wire 120.

[0087] Figure 8 A comparison test diagram of the earphone provided according to some embodiments of this specification is shown. The abscissa of this diagram is the frequency of the electromagnetic wave, and the ordinate is the electric field strength measured at a distance of 3 meters from the earphone to be tested. The left diagram is the test diagram before the first bead module and the second bead module are set, and the right diagram is the test diagram after the first bead module and the second bead module are set. By comparison, after the two bead modules are set, a good suppression effect is achieved on the electromagnetic waves of 240 MHz and 720 MHz, making the electromagnetic radiation of the earphone lower than the constraint value in the current electromagnetic compatibility standard.

[0088] In summary, the earphone provided in this specification is provided with a first bead module between the first earphone module and the second earphone module to at least partially block the first wireless electromagnetic radiation from being emitted outward through the wire. Further, the earphone provided in this specification is provided with a second bead module between the communication unit and the first movement unit to at least partially block the second wireless electromagnetic radiation from being emitted outward through the first earhook wire. Furthermore, when the earphone provided in this specification performs high-speed wired data transmission, the electromagnetic interference radiated outward is controlled within the range specified by the general standard.

[0089] The above describes specific embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the acts or steps recited in the claims may be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require a particular order or a sequential order to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0090] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, those skilled in the art can understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be proposed by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0091] In addition, certain terms in this application have been used to describe embodiments of this application. For example, "one embodiment", "an embodiment", and / or "some embodiments" mean that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. Therefore, it should be emphasized and understood that two or more references to "an embodiment" or "one embodiment" or "alternative embodiments" in various parts of this application do not necessarily all refer to the same embodiment. Additionally, the specific features, structures, or characteristics may be appropriately combined in one or more embodiments of this application.

[0092] It should be understood that in the foregoing description of the embodiments of this application, for the purpose of helping to understand a feature and for the purpose of simplifying this application, this application combines various features in a single embodiment, drawing, or its description. However, this does not mean that the combination of these features is necessary. Those skilled in the art may very well mark out some of the devices as separate embodiments when reading this application. That is to say, the embodiments in this application can also be understood as the integration of multiple sub-embodiments. And it is also valid when the content of each sub-embodiment is less than all the features of a single foregoing disclosed embodiment.

[0093] Each patent, patent application, publication of patent application, and other materials cited herein, such as articles, books, specifications, publications, documents, items, etc., except for any historical prosecution documents associated therewith, any identical ones that may be inconsistent or conflict with this document, or any identical historical prosecution documents that may have a limiting effect on the broadest scope of the claims, may be incorporated herein by reference and used for all purposes now or hereafter associated with this document. Further, if there is any inconsistency or conflict between the description, definition, and / or use of terms associated with any of the materials incorporated herein and the terms, descriptions, definitions, and / or uses associated with this document, the terms of this document shall govern.

[0094] Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed in this application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations based on the embodiments in this application to implement the application in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. An earphone, comprising: A first earphone module, including a data transmission unit that performs wired transmission of target data with the outside world when working; A second earphone module, electrically connected to the first earphone module through a wire; And A first bead module, disposed between the first earphone module and the second earphone module to at least partially block the first wireless electromagnetic radiation emitted outward at the wire due to the wired transmission.

2. The earphone according to claim 1, characterized in that, The ratio of the wavelength of the first wireless electromagnetic radiation to the length of the wire is in the range of 3.7 to 4.

3.

3. The earphone according to claim 2, characterized in that, The frequency of the first wireless electromagnetic radiation is in the range of 220 MHz to 260 MHz, and the length of the wire is in the range of 27 cm to 37 cm.

4. The earphone according to claim 1, wherein The first bead module includes at least one bead, and the impedance of the at least one bead reaches a peak in the frequency range of 220 MHz to 800 MHz.

5. The earphone according to claim 1, characterized in that, The data transmission unit includes: A data transmission interface; A memory for storing the target data; and A data input / output circuit, electrically connected to the data transmission interface and the memory, and at least partially covered with a signal shield on the data input / output circuit to at least partially block the external radiation generated during the wired transmission of the target data, wherein, the wired transmission of the target data includes: the data input / output circuit wired receives the target data sent from the outside through the data transmission interface, or wired sends the target data to the outside through the data transmission interface.

6. The earphone according to claim 1, wherein The first earphone module includes a communication unit and a first movement unit; The second earphone module includes a power supply unit and a second movement unit; and The first bead module is connected to the communication unit to at least partially block at least part of the first wireless electromagnetic radiation generated by the clock signal of the communication unit in the wire.

7. The earphone according to claim 6, wherein The second earphone module further includes a power supply temperature detector and a button; The communication unit includes at least one of a power supply interface, a power supply temperature detection signal interface, a button signal interface, or a second speaker data interface; and The first bead module includes at least one of a first bead unit, a second bead unit, a third bead unit, or a fourth bead unit, wherein, the first bead unit is connected to the power supply unit through the power supply interface, The second bead unit is connected to the power supply temperature detector through the power supply temperature detection signal interface, The third bead unit is connected to the button through the button signal interface, The fourth bead unit is connected to the second movement unit through the second speaker data interface.

8. The earphone according to claim 7, wherein The power supply interface includes a power supply positive interface and a power supply ground interface; The second speaker data interface includes a second speaker data positive interface and a second speaker data negative interface, wherein, at least one bead in the first bead unit is connected to the power supply positive interface, At least one bead in the first bead unit is connected to the power ground interface, At least one bead in the fourth bead unit is connected to the positive second speaker data interface, and At least one bead in the fourth bead unit is connected to the negative second speaker data interface.

9. The earphone according to claim 6, wherein The power supply unit includes a battery; The communication unit and the first movement unit are connected by a first earhook wire; The power supply unit and the second movement unit are connected by a second earhook wire; And The earphone further includes a second bead module disposed between the communication unit and the first movement unit to at least partially block the second wireless electromagnetic radiation of the harmonic signal of the clock signal from being emitted outward through the first earhook wire; The first earphone module further includes at least one of a first microphone or a second microphone; The communication unit further includes at least one of a first microphone interface, a second microphone interface, or a first speaker data interface; and The second bead module includes at least one of a fifth bead unit, a sixth bead unit, or a seventh bead unit, wherein the fifth bead unit is connected to the first microphone through the first microphone interface, The sixth bead unit is connected to the second microphone through the second microphone interface, and The seventh bead unit is connected to the first movement unit through the first speaker data interface.

10. The earphone according to claim 1, characterized in that, It further includes a connecting portion for connecting the first earphone module and the second earphone module, and the connecting portion includes: An elastic bracket; The wire extends along the elastic bracket; And An insulating outer skin that wraps the elastic bracket and the wire.

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