TWS earphone with hearing protection function

Abstract

The utility model discloses a TWS earphone with hearing protection, which is characterized in that the TWS earphone transmits a voice signal converted by Bluetooth sound input to a master control module, and the voice signal is controlled by internal Bluetooth and then sent to a mobile device connected with the master control module through an antenna; a signal received by the antenna is transmitted to the loudspeaker through the main control module; according to the hearing protection earphone, noise signals converted by hearing protection sound input are transmitted to hearing protection sound processing, parameter values of the balance correction circuit are set by the logic control and hearing protection volume adjusting key, and sound is restored by the loudspeaker. The TWS earphone provided by the utility model has the functions of hearing protection and wireless connection with Bluetooth entertainment equipment at the same time, and a user can select a proper working mode according to own requirements; through the built-in balance correction circuit, the balance degree of the earphone can be adjusted in a mode of modifying parameters through software aiming at the condition that left and right sound channels are unbalanced in a hearing protection mode, and the use experience of the earphone is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of audio equipment, and in particular relates to a TWS earphone with hearing protection. Background Art

[0002] Looking at the hearing protection earphones currently on the market, passive noise reduction products are generally bulky and inconvenient to carry around. Wearing them for extended periods can cause discomfort, especially in hot weather. Furthermore, outside noise is largely inaudible, posing a safety hazard in certain industrial environments. This type of noise reduction doesn't adjust or control the volume. Active noise reduction earphones utilize imported, high-performance digital processing chips or specialized chips, combined with external circuitry, to achieve active noise reduction. These products are expensive, have a narrow noise reduction depth, and a limited volume control range. The use of imported or specialized chips can make supply difficult when the supply chain is strained, potentially impacting product launches. Analyzing hearing protection earphones currently on the market, passive noise reduction products, solely focused on noise reduction, are overly specialized and lack practical applicability. To address these issues, we have developed a pair of TWS earphones with integrated hearing protection. Summary of the Invention

[0003] The purpose of this utility model is to provide a TWS headset with hearing protection to solve the existing problems.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The utility model is a TWS headset with hearing protection, including Bluetooth sound input, hearing protection sound input, main control module, hearing protection sound processing, balance correction circuit, indicator light, lithium battery protection circuit, antenna, touch module, hearing protection volume adjustment button, speaker and power circuit;

[0006] The TWS earphones consist of Bluetooth sound input, main control module, antenna, touch module, speaker, lithium battery protection circuit and power supply;

[0007] The Bluetooth sound input is used as a pickup for the Bluetooth module. When the TWS headset makes a voice call, it converts the voice signal into an audio signal and sends it to the connected Bluetooth device through the main control module.

[0008] The main control module includes Bluetooth control and logic control; Bluetooth control is to realize the functional operation of the Bluetooth part of the TWS headset; the main control module is composed of a single-chip large-scale integrated circuit dedicated Bluetooth chip and is software-programmed;

[0009] The antenna is a transmitting tool between the TWS headset and the mobile device;

[0010] The lithium battery protection circuit is used to protect the lithium battery during the charging and discharging process of the headset;

[0011] The indicator light indicates different states of the headset through different colors or lighting modes of the indicator light;

[0012] The speaker restores the audio signal received from the mobile device or the noise in the protection mode;

[0013] The earphones with hearing protection are composed of a hearing protection input, a hearing protection sound processing, a main control module, a balance correction circuit, a touch module, a hearing protection volume adjustment button and a speaker;

[0014] The hearing protection sound input is connected to the external pickup of the hearing protection module, which converts external noise into an audio signal; it is realized by an electret microphone;

[0015] The logic control in the main control module is the logic control of the earphone hearing protection module, including switching between Bluetooth mode and hearing protection mode, and switching the volume level in hearing protection mode;

[0016] The hearing protection sound processing is to amplify the audio signal converted from the hearing protection input in the hearing protection mode, perform AGC control, and then drive the speaker to restore the sound; it is implemented by an amplification or detection circuit composed of discrete transistor components, or a dedicated circuit composed of an integrated circuit chip as the core;

[0017] During the production process, the balance correction circuit can correct the deviation caused by components and structures through software, so that the parameters of the left and right ears match and achieve mutual balance, ensuring the use effect;

[0018] The touch module is a function key of the entire headset. By single-clicking, double-clicking, triple-clicking, or long-touch operation on the left or right ear, the Bluetooth volume can be adjusted, the hearing protection mode can be turned on or off, and the factory settings can be restored.

[0019] The hearing protection volume adjustment button is used to switch the volume level of the hearing protection;

[0020] The power supply circuit provides appropriate power to each module of the headset to ensure stable operation of the headset.

[0021] Furthermore, the voice signal converted from the Bluetooth sound input is transmitted to the main control module, and after being controlled by the internal Bluetooth, it is sent to the mobile device connected thereto by the antenna; the signal received by the antenna is transmitted to the speaker through the main control module.

[0022] Furthermore, the noise signal converted from the hearing protection sound input is transmitted to the hearing protection sound processing, and the sound is restored by the speaker through logic control, hearing protection volume adjustment buttons, and parameter values of the balance correction circuit.

[0023] The utility model has the following beneficial effects:

[0024] This utility model adopts a domestically produced microprocessor, which makes it a complete replacement for headphones designed with imported chips, with lower cost and more stable supply. Combined with TWS headphones, users can avoid the entanglement of annoying wires and freely make calls and listen to audio and video programs in various ways. The touch key is combined with the mechanical key design. The Bluetooth volume of the headphones can be adjusted and the mode can be switched by single-clicking, double-clicking, triple-clicking or long-pressing the touch keys on the left and right ears. The mechanical key adjusts the volume of the hearing protection, making the operation more handy.

[0025] The utility model also has a prompt sound function, which gives different prompt sounds for operation steps and status, so that users can better understand the current status of the headset;

[0026] The utility model discloses a TWS earphone with hearing protection, which has a built-in balance correction circuit. In response to the imbalance of the left and right channels in the hearing protection mode, the balance of the earphone can be adjusted by modifying parameters through software, providing a better experience when using the earphone.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be given below to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of the structure of a TWS headset with hearing protection;

[0030] Figure 2 This is a schematic diagram of the hearing protection structure of a TWS headset with hearing protection;

[0031] Figure 3 This is a schematic diagram of the circuit structure of a Bluetooth headset with TWS headset with hearing protection;

[0032] Figure 4 This is a schematic diagram of the hearing protection circuit structure of a TWS headset with hearing protection. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] See also Figure 1-Figure 2 As shown, the utility model is a TWS headset with hearing protection, including a Bluetooth sound input 1, a hearing protection sound input 2, a main control module 3, a hearing protection sound processing 4, a balance correction circuit 5, an indicator light 7, a lithium battery protection circuit 8, an antenna 9, a touch module 10, a hearing protection volume adjustment button 11, a speaker 12 and a power supply circuit 13;

[0037] The Bluetooth sound input 1, main control module 3, antenna 9, touch module 10, speaker 12, lithium battery protection circuit 8 and power supply 13 constitute the TWS headset;

[0038] Bluetooth sound input 1 is used as a pickup for the Bluetooth module. When the TWS headset makes a voice call, it converts the voice signal into an audio signal and sends it to the connected Bluetooth device through the main control module 3;

[0039] The main control module 3 includes a Bluetooth control 31 and a logic control 32; the Bluetooth control 31 is used to implement the functional operation of the Bluetooth part of the TWS headset; the main control module 3 is composed of a single-chip large-scale integrated circuit dedicated Bluetooth chip and is software-programmed;

[0040] Antenna 9 is the transmission tool between the TWS headset and the mobile device;

[0041] The lithium battery protection circuit 8 protects the lithium battery during the charging and discharging process of the headset;

[0042] Indicator light 7 indicates the different states of the headset through different colors or lighting modes;

[0043] The speaker 12 restores the audio signal received from the mobile device or the noise in the protection mode;

[0044] The hearing protection input 2, the hearing protection sound processing 4, the main control module 3, the balance correction circuit 5, the touch module 10, the hearing protection volume adjustment button 11 and the speaker 12 constitute the earphones with hearing protection;

[0045] Hearing protection sound input 2 is connected to the external pickup of the hearing protection module, which converts external noise into audio signals; it is realized by an electret microphone;

[0046] The logic control 32 in the main control module 3 is the logic control of the earphone hearing protection module, including switching between Bluetooth mode and hearing protection mode, and switching the volume level in hearing protection mode;

[0047] The hearing protection sound processing 4 amplifies the audio signal converted from the hearing protection input 2 in the hearing protection mode, performs AGC control, and then drives the speaker 12 to restore the sound; it is implemented by an amplification or detection circuit composed of discrete transistor components, or a dedicated circuit composed of an integrated circuit chip as the core;

[0048] During the production process, the balance correction circuit 5 can correct the deviation caused by components and structures through software, so that the parameters of the left and right ears match and achieve mutual balance to ensure the use effect;

[0049] The touch module 10 is the function key of the entire headset. By single-clicking, double-clicking, or triple-clicking the left or right ear, or long-touch operation, you can adjust the Bluetooth volume, turn on or off the hearing protection mode, and restore the factory settings.

[0050] The hearing protection volume adjustment button 11 is used to switch the volume level of the hearing protection;

[0051] The power supply circuit 13 provides appropriate power to each module of the headset to ensure stable operation of the headset.

[0052] In one embodiment, the voice signal converted by the Bluetooth sound input 1 is transmitted to the main control module 3, and then sent to the mobile device connected thereto by the antenna 9 through the internal Bluetooth control 31; the signal received by the antenna 9 is transmitted to the speaker 12 through the main control module 3.

[0053] In one embodiment, the noise signal converted by the hearing protection sound input 2 is transmitted to the hearing protection sound processing 4 , and after the logic control 32 and the hearing protection volume adjustment button 11 and the parameter value of the balance correction circuit 5 are set, the sound is restored by the speaker 12 .

[0054] See also Figure 3 As shown, Bluetooth sound input 1 includes pickup U5, diode ESD5, capacitor C1 and capacitor C14; pickup U5 is a MEMS microphone, the 2nd / 3rd pin (GND) of pickup U5 is grounded, one end of diode ESD5 and capacitor C14 is connected to the 1st pin (POWER) of pickup U5 and the other end is grounded, one end of capacitor C1 is connected to the 4th pin (OUTPUT) of pickup U5 and the other end is grounded, the 4th pin (OUTPUT) of pickup U5 is connected in series with capacitor C7 and then connected to the 24th pin (AU_VINO_P) of main control module 3, the 1st pin (POWER) of pickup U5 is connected to the 28th pin (AU_MICBIASO) of main control module 3 to ensure that the audio signal converted by Bluetooth sound input 1 is transmitted to main control module 3; after being processed internally by main control module 3, it is output from pins 30 and 29, and passes through the filtering circuit composed of R7, R9, C13, ESD10, R3, R6, C6, and ESD9. The sound is restored by speaker J6.

[0055] The touch button J7 is connected in series with resistor R35 to the fourth pin of the touch chip U12, the capacitor C50 is connected to the fourth pin of the touch chip U5 and the ground, the third pin of the touch chip U5 is connected to the positive pole of the battery and one end of the capacitor C51, the other end of the capacitor C51 is connected to the second and fifth pins of the touch chip and grounded, and the first pin of the touch chip U5 is connected to the 10th pin of U1. Various functional operations can be achieved by single-clicking, double-clicking, triple-clicking and long pressing.

[0056] See also Figure 4 As shown, hearing protection sound input 2 includes microphone U8, ESD diode D3, resistors R16, R20, capacitors C37, and C38. Microphone U8 is an electret microphone, its positive terminal connected in series with capacitors C37, R20, and C38, and then connected to pin 8 (MICIN) of U7. ESD diode D3 is connected to the positive terminal of microphone U8, and the other terminal to the negative terminal of microphone U8 and ground. Resistor R16 is connected to the positive terminal of microphone U8 and the other terminal to pin 13 (MICBIAS) of U7, providing power to microphone U8 to ensure that the noise signal converted by hearing protection sound input 1 is transmitted to U7. Hearing protection sound processing unit U7 performs preamplification, AGC control, and power amplification of the signal. The signal is then transmitted from pin 6 of U7 through capacitor C39 and resistor R21, driving speaker J6 to reproduce the sound.

[0057] Chip U2, capacitors C10, R4, R2 and main control module U1 form a balance correction circuit; the main control module 3 communicates with U2 through pins 39 and 40, and transmits the gear setting parameter value of U1 to U2, wherein pin 6 of U2 is connected to the signal input of U7, which is located between R20 and C38. In this way, by changing the size of the input signal, the volume level we need is obtained; since the consistency of the component parameters of each earphone is different, the actual parameters of the left and right ears do not match during the production process, affecting the use effect; according to the actual parameters measured by the production instrument, the main control module U1 calculates internally and resends the new correction value to U2 to keep the parameters of the left and right ears consistent; this solves the parameter consistency problem of the left and right ear hearing protection.

[0058] Button K1 is used to switch the volume level in protection mode. When in headphone protection mode, press the left or right ear button once to switch the volume level. Pressing it continuously can cycle the operation. Each press will prompt with a different prompt tone.

[0059] The main control module U1 is composed of a single-chip large-scale integrated circuit Bluetooth chip; by programming it with software, it first realizes the functional operation of the Bluetooth part of the TWS headset, and then realizes the logical control of the headset hearing protection module, including switching between Bluetooth mode and hearing protection mode, switching the volume gear in hearing protection mode, and the calibration function of the circuit module parameters during the production process.

[0060] What needs further explanation is the touch definition implementation method:

[0061] When the TWS earbuds are playing music, a single tap on the left earbud decreases the volume, and a triple tap plays the previous song. A single tap on the right earbud increases the volume, and a triple tap plays the next song. Each tap is accompanied by a different tone.

[0062] During TWS call operation, double-click either earphone to answer or end the call, and triple-click to reject the call.

[0063] If you touch the left or right ear for more than three seconds, it will switch between protection mode and Bluetooth mode, and a special prompt tone will be used to indicate it.

[0064] If you touch the left or right ear for more than ten seconds, the factory settings will be restored, the pairing information will be cleared, and a special prompt tone will be used.

[0065] Throughout this specification, references to terms such as "one embodiment," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0066] The preferred embodiments of the present invention disclosed above are intended only to illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, numerous modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A TWS headset with hearing protection, characterized by: Includes Bluetooth sound input, hearing protection sound input, main control module, hearing protection sound processing, balance correction circuit, indicator light, lithium battery protection circuit, antenna, touch module, hearing protection volume adjustment button, speaker and power circuit; The TWS earphones consist of Bluetooth sound input, main control module, antenna, touch module, speaker, lithium battery protection circuit and power supply; The Bluetooth sound input is used as a pickup for the Bluetooth module. When the TWS headset makes a voice call, it converts the voice signal into an audio signal and sends it to the connected Bluetooth device through the main control module. The main control module includes Bluetooth control and logic control; Bluetooth control is to realize the functional operation of the Bluetooth part of the TWS headset; the main control module is composed of a single-chip large-scale integrated circuit dedicated Bluetooth chip and is software-programmed; The antenna is a transmitting tool between the TWS headset and the mobile device; The lithium battery protection circuit is used to protect the lithium battery during the charging and discharging process of the headset; The indicator light indicates different states of the headset through different colors or lighting modes of the indicator light; The speaker restores the audio signal received from the mobile device or the noise in the protection mode; The hearing protection earphones are composed of a hearing protection input, a hearing protection sound processing, a main control module, a balance correction circuit, a touch module, a hearing protection volume adjustment button and a speaker; The hearing protection sound input is connected to the external pickup of the hearing protection module, which converts external noise into an audio signal; it is realized by an electret microphone; The logic control in the main control module is the logic control of the earphone hearing protection module, including switching between Bluetooth mode and hearing protection mode, and switching the volume level in hearing protection mode; The hearing protection sound processing is to amplify the audio signal converted from the hearing protection input in the hearing protection mode, perform AGC control, and then drive the speaker to restore the sound; It is composed of an amplification or detection circuit composed of discrete transistor components, or a dedicated circuit composed of an integrated circuit chip as the core; During the production process, the balance correction circuit can correct the deviation caused by components and structures through software, so that the parameters of the left and right ears match and achieve mutual balance, ensuring the use effect; The touch module is a function key of the entire headset. By single-clicking, double-clicking, triple-clicking, or long-touch operation on the left or right ear, the Bluetooth volume can be adjusted, the hearing protection mode can be turned on or off, and the factory settings can be restored. The hearing protection volume adjustment button is used to switch the volume level of the hearing protection; The power supply circuit provides appropriate power to each module of the headset to ensure stable operation of the headset.

2. A TWS headset with hearing protection according to claim 1, characterized in that: The voice signal converted from the Bluetooth sound input is transmitted to the main control module, and after being controlled by the internal Bluetooth, it is sent to the mobile device connected thereto by the antenna; the signal received by the antenna is transmitted to the speaker through the main control module.

3. A TWS headset with hearing protection according to claim 1, characterized in that: The noise signal converted from the hearing protection sound input is transmitted to the hearing protection sound processing, and after the logic control and the hearing protection volume adjustment button and the parameter value of the balance correction circuit are set, the sound is restored by the speaker.

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