CN206743531U - A kind of earphone that can switch the loudspeaker into a microphone - Google Patents

Abstract

The utility model provides a can switch loudspeaker into earphone of microphone, this earphone includes the casing, moving coil loudspeaker and audio interface, moving coil loudspeaker set up in the cavity that the casing encloses, moving coil loudspeaker include the sound membrane, voice coil loudspeaker voice coil and permanent magnet, moving coil loudspeaker include first loudspeaker and second loudspeaker, this earphone still includes power module, host system, switching circuit module, first power amplification module, second power amplification module, power module is host system output electric energy, host system includes control chip and button module, control chip is connected with button module. The utility model discloses an earphone that can switch into microphone with loudspeaker does not need just can talk over through installing extra microphone, and realization loudspeaker that can be comparatively convenient switches into the function of microphone, easy operation, simple structure, and the practicality is good, still has the effect of making an uproar and side sound of falling simultaneously, can provide better more high-quality communication effect.

Description

A kind of earphone that can switch the loudspeaker into a microphone

technical field

The utility model relates to the technical field of electronic products, in particular to an earphone capable of switching a loudspeaker into a microphone.

Background technique

With the development of digital electronic technology, all electronic products are developing towards the trend of lightweight and miniaturization. People can use miniaturized electronic products anytime and anywhere, including portable music players. In addition, due to the increasing popularity of personal digital products, such as common MP3 players, mobile phones, personal digital assistants or notebook computers, etc., are indispensable in daily life.

Headphones have become a necessary accessory for electronics. In addition, the earphones also provide the listener with better sound transmission, so that the listener can clearly hear and understand the sound content, unlike the unclear situation caused by sound transmission in the air.

Most of the earphones currently on the market need to install an additional microphone to communicate. Generally, they need to be operated by buttons, and users often need to use their hands to adjust the position of the microphone when making a call, which brings a lot of inconvenience to the user. Especially in the process of driving, there is a great potential safety hazard.

Contents of the invention

The main purpose of the utility model is to provide an earphone which can switch the loudspeaker into the microphone.

In order to achieve the above-mentioned main purpose, the utility model provides a kind of earphone that can switch the speaker into a microphone, which includes a casing, a dynamic speaker and an audio interface. The dynamic speaker is arranged in a cavity surrounded by the casing, and the dynamic speaker includes The sound film, the voice coil and the permanent magnet, the audio interface are connected to the shell through the connecting wire, the dynamic speaker includes the first speaker and the second speaker, the first speaker and the second speaker are set opposite to each other, the earphone also includes a power module and a main control module , switching circuit module, first power amplification module, second power amplification module, the power supply module outputs electric energy to the main control module, and the dynamic speaker is used to receive the sound wave signal transmitted from the outside and send the sound wave signal to the main control module, the main control module It includes a control chip and a key module, the control chip is connected to the key module, the key module sends the key control signal to the control chip, the control chip sends the switch control signal to the switch circuit module, the main control module is used to receive the sound wave signal, and pass the sound wave signal through the switch The output of the circuit module is to the first power amplification module. The first power amplification module amplifies the sound wave signal at a high magnification and converts it into an amplified signal and sends it to the audio interface and the second power amplification module. The second power amplification module passes the sound wave signal through the second stage The amplified signal is converted into a secondary amplified signal, and the second power amplifying module sends the secondary amplified signal to the second speaker.

It can be seen from the above solution that when the earphone receives a call signal, the speaker can convert the sound wave into an electric wave, and can replace the microphone as a pickup, and the call can be made without installing an additional microphone.

It can be seen that since the communication mode of the earphone does not need to install an additional microphone, the structure is simple, the operation is convenient, and the practicability is good.

A further solution is that the switching circuit module includes an electronic switching IC, and the electronic switching IC is connected to the first speaker.

A further solution is that the first power amplifying module includes an emitter follower and an audio power amplifier, and the emitter follower is connected to the audio power amplifier.

A further solution is that the emitter follower includes a transistor Q1 and a transistor Q2, and the collector of the transistor Q1 is connected to the base of the transistor Q2.

A further solution is that the audio power amplifier includes an LM386 audio amplifier, the first end of the LM386 audio amplifier is connected to the positive pole of the power supply, and the second end of the LM386 audio amplifier is connected to the emitter follower.

A further solution is that the second power amplification module includes a TEA2025 chip, the first end of the TEA2025 chip is connected to the second speaker, and the second end of the TEA2025 chip is grounded.

A further solution is that the second power amplifying module further includes a secondary amplifying circuit, the secondary amplifying circuit is connected to the second speaker, and the secondary amplifying circuit sends the secondary amplifying signal to the second speaker.

A further solution is that an earphone capable of switching a speaker into a microphone is further provided with a power detection circuit, and the power detection circuit is used to acquire power information of an earphone capable of switching a speaker into a microphone.

A further solution is that the power module includes a power input interface, a battery charging management chip and a rechargeable battery, the power input interface is electrically connected to the power supply terminal of the rechargeable battery, and the voltage output terminal of the battery charging management chip is connected to the positive electrode of the rechargeable battery. connect.

It can be seen that when the earphone receives a call signal, the speaker can convert the sound wave into an electric wave, which can replace the microphone as a pickup, and the call can be made without installing an additional microphone, and the speaker can be switched more conveniently. It has the function of a microphone, simple operation, simple structure, good practicability, and also has the effect of noise reduction and side tone, which can provide better and better communication effects.

Description of drawings

Fig. 1 is a structural schematic diagram of a dynamic speaker in an embodiment of an earphone that can switch the speaker to a microphone of the present invention.

Fig. 2 is a schematic circuit diagram of a switching circuit module and a first power amplifying module in an embodiment of an earphone capable of switching a loudspeaker into a microphone of the present invention.

Fig. 3 is a schematic circuit diagram of the main control module in an embodiment of an earphone capable of switching the speaker into a microphone of the present invention.

Fig. 4 is a schematic circuit diagram of the second power amplifying module in an embodiment of an earphone capable of switching the loudspeaker into a microphone of the present invention.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

detailed description

A kind of earphone of the utility model that can switch the horn into a microphone is applied in the electronic product industry, and a kind of earphone of the utility model that can switch the horn into a microphone can make a call without installing an additional microphone, and can It is more convenient to realize the function of switching the speaker into a microphone. Therefore, the implementation method of the earphone is that when the earphone receives a call signal, the dynamic speaker 10 can convert the sound wave into an electric wave, thereby realizing the use of the speaker instead of the microphone, and compared with As for the traditional earphone, the earphone of the utility model can be switched from a loudspeaker to a microphone, which is easy to operate and has good practicability.

Referring to Fig. 1, a kind of earphone of the utility model that can switch the speaker into a microphone includes a housing, a moving coil speaker 10 and an audio interface 21, the moving coil speaker 10 is arranged in a cavity surrounded by the housing, and the moving coil speaker 10 includes Sound film 11, voice coil 13 and permanent magnet 12, audio interface 21 are connected with casing by connection line, and moving coil speaker 10 can generally convert electric wave into sound wave, and in the present embodiment, moving coil speaker 10 can also be The sound wave is converted into electric wave, realizing the function of using the speaker instead of the microphone.

2 to 4, the dynamic speaker 10 includes a first speaker 14 and a second speaker 15, the first speaker 14 is set opposite to the second speaker 15, and a bidirectionally switchable earphone also includes a power module 61, a main control module 1. The button module 63, the switching circuit module 40, the first power amplifier module 2, the second power amplifier module 3, the power module 61 outputs electric energy to the main control module 1, and the dynamic speaker 10 is used to receive the sound wave signal transmitted from the outside and The sound wave signal is sent to the main control module 1, the main control module 1 includes a control chip 60 and a button module 63, the control chip 60 is connected to the button module 63, the button module 63 sends a button control signal to the control chip 60, and the control chip 60 sends a switching control signal To the switching circuit module 40, the main control module 1 is used to receive the sound wave signal, and output the sound wave signal to the first power amplifying module 2 through the switching circuit module 40, and the first power amplifying module 2 converts the sound wave signal into an amplified The signal is sent to the audio interface 21 and the second power amplifying module 3, and the second power amplifying module 3 converts the amplified signal into a secondary amplified signal after being amplified in the second stage, and the second power amplifying module 3 sends the secondary amplified signal to The second horn 15.

The key module 63 includes a key switch S0, and the switching circuit module 40 includes an electronic switching IC. When the earphone receives a call signal, the user presses the key switch S0 to switch between the speaker and the microphone. When the user presses the key switch S0, the key The switch S0 will send a button action signal to the control chip 60, a pin of the control chip 60 will output a high level, and the control chip 60 will send a switching control signal to the switching circuit module 40, thereby triggering the electronic switching IC, the first The speaker 14 will switch to the microphone mode, realizing the function of switching the dynamic speaker 10 into a microphone. In this embodiment, preferably, the electronic switching IC is a TS3A5223 bidirectional analog switch.

In this example, the electronic switching IC is electrically connected to the emitter follower 20, the audio power amplifier 30 is electrically connected to the emitter follower 20, and the dynamic speaker 10 is used to receive the sound wave signal transmitted from the outside and send the sound wave signal to The emitter follower 20, the emitter follower includes a transistor Q1 and a transistor Q2, the collector of the transistor Q1 is connected to the base of the transistor Q2, and the transistor Q1 and the transistor Q2 can form a Darlington type emitter follower 20 The emitter follower 20 converts the sound wave signal into a weaker amplified signal after high-power amplification and impedance matching, and the audio power amplifier 30 is used to receive the weaker amplified signal and convert the weaker amplified signal into a weaker amplified signal. Strong amplified signal, the audio interface is used to receive the strong amplified signal. In this way, the voice signal can be input into smart communication devices such as mobile phones through the audio interface for conversation, and it is more convenient to realize the function of switching the speaker into a microphone. easy to use.

Audio power amplifier 30 comprises LM386 audio amplifier, the first end of LM386 audio amplifier is connected with power supply positive pole, the second end of LM386 audio amplifier is connected with emitter follower, LM386 audio amplifier is a three-stage amplifying circuit, can not only One-end input single-end output detection circuit, and can eliminate crossover distortion while increasing the magnification.

Referring to Fig. 4, the second power amplification module includes a TEA2025 chip U2 and a secondary amplifier circuit 50, the first end of the TEA2025 chip U2 is connected to the second speaker 15, the second end of the TEA2025 chip U2 is grounded, and the secondary amplifier circuit 50 is connected to the second speaker 15. The two speakers 15 are connected, and the second power amplification module 3 converts the amplified signal into a secondary amplified signal after the second-stage amplification through the secondary amplifying circuit 50, and the secondary amplifying circuit 50 sends the secondary amplified signal to the second speaker 15, The second speaker 15 also has a side tone effect at the same time, which can provide better and better communication effects.

In this embodiment, TEA2025 chip U2 is a circuit integrated block mainly composed of two audio preamplifiers with the same function, power amplifier, decoupling, drive circuit, power supply circuit, etc. It has the characteristics of low impact noise and few external components when it is switched on. By adjusting the external adjustable resistor R8, the maximum voltage gain can be adjusted.

In this embodiment, the power module 61 includes a power input interface, a battery charging management chip and a rechargeable battery, the power input interface is electrically connected to the power supply terminal of the rechargeable battery, and the voltage output terminal of the battery charging management chip is connected to the positive pole of the rechargeable battery. Electrically connected, set the battery charging management chip, which can be used to protect the battery circuit, prevent the battery from over-discharging, over-voltage, over-charging, and over-temperature, effectively protecting the battery life and user safety.

An earphone of the utility model that can switch the speaker into a microphone is also provided with a power detection circuit 62, the power detection circuit 62 is used to obtain the power information of the power module 61, and the power detection circuit is set to monitor the remaining power of the power module in real time. The user can be reminded to charge when the battery is insufficient, for example, a red light will prompt when the battery is insufficient.

It can be seen that a kind of earphone of the utility model that can switch the speaker into a microphone converts the sound wave into an electric wave through the moving coil speaker 10, so as to realize the switch of the speaker into a microphone. Compared with the traditional earphone, the convenience of operation is improved. , simple in structure and good in practicability.

In addition, the earphone of the present invention is connected with the second speaker 15 through the second power amplifier module 3, so that the second speaker 15 also has a side tone effect at the same time, which can provide better and better communication effects. earmuffs, so using the dynamic speaker 10 in the earphone as a microphone can attenuate the environmental noise to a certain decibel, which can bring a clearer call effect and reduce the noise and sound interference caused by the external environment.

Finally, it should be emphasized that the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various changes and modifications. Within the spirit and principles of the utility model, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the utility model.

Claims (9)

1. An earphone that can switch the speaker into a microphone, including Housing, dynamic speaker and audio interface; The moving coil horn is arranged in a cavity surrounded by the housing; The moving coil speaker includes a sound film, a voice coil and a permanent magnet; The audio interface is connected to the housing through a connecting line; It is characterized by: The moving coil horn includes a first horn and a second horn, and the first horn is arranged opposite to the second horn; The earphone also includes a power supply module, a main control module, a switching circuit module, a first power amplification module, and a second power amplification module, the power supply module outputs electric energy for the main control module, and the dynamic speaker is used to receive external transmitting the sound wave signal and sending the sound wave signal to the main control module; The main control module includes a control chip and a button module, the control chip is connected to the button module, the button module sends a button control signal to the control chip, and the control chip sends a switching control signal to the switching circuit module, the main control module is used to receive the sound wave signal, and output the sound wave signal to the first power amplification module through the switching circuit module; The first power amplifying module amplifies the sound wave signal at a high magnification and converts it into an amplified signal, and then sends it to the audio interface and the second power amplifying module respectively, and the second power amplifying module passes the amplified signal through The second-stage amplified signal is converted into a second-stage amplified signal, and the second power amplifying module sends the second-stage amplified signal to the second speaker. 2. A kind of earphone that can switch the loudspeaker into a microphone according to claim 1, characterized in that: The switching circuit module includes an electronic switching IC, and the electronic switching IC is connected to the first speaker. 3. A kind of earphone that can switch the loudspeaker into a microphone according to claim 1, characterized in that: The first power amplifying module includes an emitter follower and an audio power amplifier, and the emitter follower is electrically connected to the audio power amplifier. 4. A kind of earphone that can switch the loudspeaker into a microphone according to claim 3, characterized in that: The emitter follower includes a transistor Q1 and a transistor Q2, the collector of the transistor Q1 is connected to the base of the transistor Q2. 5. A kind of earphone that can switch the loudspeaker into a microphone according to claim 3, characterized in that: The audio power amplifier includes an LM386 audio amplifier, the first end of the LM386 audio amplifier is connected to the positive pole of the power supply, and the second end of the LM386 audio amplifier is electrically connected to the emitter follower. 6. A kind of earphone capable of switching the loudspeaker into a microphone according to claim 1 or 2, characterized in that: The second power amplification module includes a TEA2025 chip, the first end of the TEA2025 chip is connected to the second speaker, and the second end of the TEA2025 chip is grounded. 7. A kind of earphone capable of switching the loudspeaker into a microphone according to claim 1 or 2, characterized in that: The second power amplifying module further includes a secondary amplifying circuit, the secondary amplifying circuit is connected to the second speaker, and the secondary amplifying circuit sends a secondary amplifying signal to the second speaker. 8. An earphone capable of switching the speaker into a microphone according to claim 1 or 2, characterized in that: The earphone that can switch the speaker to the microphone is also provided with a power detection circuit, and the power detection circuit is used to obtain the power information of the power module. 9. An earphone capable of switching the speaker into a microphone according to claim 1 or 2, characterized in that: The power supply module includes a power input interface, a battery charging management chip and a rechargeable battery, the power input interface is electrically connected to the power supply terminal of the rechargeable battery, and the voltage output terminal of the battery charging management chip is connected to the rechargeable battery. The positive terminal of the battery is electrically connected.