CN202587346U - Bluetooth sound box - Google Patents

Abstract

The utility model relates to a Bluetooth sound box. The Bluetooth sound box includes a Bluetooth sound box shell as well as a battery and a circuit board arranged inside the Bluetooth sound box, wherein the circuit board is provided with a battery protection circuit, a power source switch circuit, a switching circuit, a peripheral audio interface circuit, a left/light audio power amplification circuit, a Bluetooth chip controlled circuit, a Bluetooth MIC circuit and a single chip microcomputer controlled circuit, wherein a power supply end of the battery protection circuit is connected to the battery, an output end of the battery protection circuit is connected with an input end of the power source switch circuit, output ends of the power source switch circuit , the peripheral audio interface circuit and the Bluetooth chip controlled circuit are connected to an input end of the switching circuit, an output end of the switching circuit is connected with an input end of the left/light audio power amplification circuit, input/output ends of the left/light audio power amplification circuit and the Bluetooth chip controlled circuit are connected with an input/output end of the single chip microcomputer controlled circuit, and an output end of the Bluetooth MIC circuit is connected with an input end of the Bluetooth chip controlled circuit.

Description

Bluetooth audio

technical field

The utility model relates to an audio system, in particular to a portable Bluetooth audio system.

Background technique

Existing stereos are mainly common stereos connected with various players, such as stereos connected with DVD, VCD, computer, television, etc. These stereos generally need to be connected to an external power supply and cannot be carried around. Therefore, when an audio player is needed outside, an external power supply needs to be carried separately, causing inconvenience to the user.

Utility model content

The technical problem to be solved by the utility model is to provide a bluetooth audio system, which solves the disadvantage of carrying a power source separately when playing in the open air.

In order to solve the above-mentioned technical problems, the utility model provides a bluetooth audio system, comprising a bluetooth audio case and a battery and a circuit board arranged in the bluetooth audio case, the circuit board is provided with a battery protection circuit, a power switch circuit, a switching circuit, and a peripheral audio system. Interface circuit, left and right audio power amplifier circuit, bluetooth chip control circuit, bluetooth MIC circuit and single-chip microcomputer control circuit, the power supply terminal of the battery protection circuit is connected to the battery, the output end of the battery protection circuit is connected to the input end of the power switch circuit, and the power switch circuit The output end of the peripheral audio interface circuit and the output end of the bluetooth chip control circuit are connected to the input end of the switching circuit, the output end of the switching circuit is connected to the input end of the left and right audio power amplifier circuits, the input and output ends of the left and right audio power amplifier circuits and The input and output ends of the bluetooth chip control circuit are connected to the input and output ends of the single-chip microcomputer control circuit, and the output ends of the bluetooth MIC circuit are connected to the input ends of the bluetooth chip control circuit. The output ends of the left and right audio power amplifier circuits are connected to speakers.

Further, the switching circuit is realized by two SPDT analog switches TS5A3157 and its peripheral circuits, so as to realize the switching of the audio source between the audio of the peripheral and the audio received by Bluetooth.

Further, the left audio power amplifier circuit and the right audio power amplifier circuit of the left and right audio power amplifier circuits are realized by audio power amplifier HT6873 and its peripheral circuits respectively.

Further, the bluetooth chip control circuit is realized by the bluetooth chip BM21SPK01 and its peripheral circuits. The single-chip microcomputer control circuit is realized by the single-chip microcomputer chip HT66F15 and its peripheral circuits.

The utility model adopts the above-mentioned circuit structure, uses the battery inside the audio system to supply power, can be carried around, and can be played anytime and anywhere, and is easy to use and carry. In addition, the utility model also has peripheral audio, which can switch the audio source between the peripheral audio and the audio received by Bluetooth through the switching circuit. The utility model achieves good sound quality through the use of various types of chips and the overall optimization of the circuit.

Description of drawings

FIG. 1 is a block diagram of a circuit board in an embodiment of the present invention.

Fig. 2a is a partial circuit schematic diagram of the circuit board of the embodiment of the present invention.

Fig. 2b is a schematic circuit diagram of the control part of the circuit board of the embodiment of the present invention.

Detailed ways

The utility model is further described now in conjunction with accompanying drawing and specific embodiment.

The bluetooth audio system of the utility model comprises a bluetooth audio case and a battery and a circuit board arranged in the bluetooth audio case.

As shown in Figure 1, the circuit board is equipped with battery protection circuit, power switch circuit, switching circuit, peripheral audio interface circuit, left and right audio power amplifier circuit, Bluetooth chip control circuit, Bluetooth MIC circuit and single-chip microcomputer control circuit. The power supply terminal of the battery protection circuit is connected to the battery, the output end of the battery protection circuit is connected to the input end of the power switch circuit, the output end of the power switch circuit, the output end of the peripheral audio interface circuit is connected to the output end of the bluetooth chip control circuit The input terminal of the switching circuit, the output terminal of the switching circuit is connected to the input terminal of the left and right audio power amplifier circuits, the input and output terminals of the left and right audio power amplifier circuits and the input and output terminals of the Bluetooth chip control circuit are connected to the input and output terminals of the single chip control circuit, and the Bluetooth MIC circuit The output end is connected to the input end of the bluetooth chip control circuit. The output ends of the left and right audio power amplifier circuits are connected to speakers.

As a preferred embodiment of the present utility model, as shown in Fig. 2a and Fig. 2b, the switching circuit is realized by two SPDT analog switches TS5A3157 and its peripheral circuits, realizing the connection between the audio of the peripheral and the audio received by Bluetooth. switch between audio sources. The left audio power amplifier circuit and the right audio power amplifier circuit of the left and right audio power amplifier circuits are realized by audio power amplifier HT6873 and its peripheral circuits respectively. The bluetooth chip control circuit is realized by the bluetooth chip BM21SPK01 and its peripheral circuits. The single-chip microcomputer control circuit is realized by the single-chip microcomputer chip HT66F15 and its peripheral circuits.

Among them, the battery provides power for the entire circuit. The power switch circuit controls the power on and off of the entire circuit to avoid power loss during standby. The switching circuit is responsible for switching between the peripheral audio interface circuit and the audio received through Bluetooth. If the switching circuit selects the audio received through the peripheral audio interface circuit, the Bluetooth audio will play the peripheral audio; if the switching circuit selects the audio received by Bluetooth , the Bluetooth speaker will play the received audio. The MIC circuit transmits the audio signal to the Bluetooth chip control circuit. Under the control of the Bluetooth chip control circuit and the single-chip microcomputer control circuit, the left and right audio power amplifier circuits amplify its power and play it through the speaker. The left and right audio amplifier circuits can adjust the left and right audio channels respectively.

The utility model adopts the above-mentioned circuit structure, uses the battery inside the audio system to supply power, can be carried around, and can be played anytime and anywhere, and is easy to use and carry. In addition, the utility model also has peripheral audio, which can switch the audio source between the peripheral audio and the audio received by Bluetooth through the switching circuit. The utility model achieves good sound quality through the use of various types of chips and the overall optimization of the circuit.

Although the utility model has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that, without departing from the spirit and scope of the utility model defined by the appended claims, changes in form and details may be made. Making various changes to the utility model is within the protection scope of the utility model. the

Claims (5)

1. bluetooth sound equipment; Comprise bluetooth sound equipment shell and battery and the circuit board be located in the bluetooth sound equipment shell; It is characterized in that: circuit board is provided with battery protecting circuit, power switch circuit, commutation circuit, peripheral hardware audio interface circuit, left and right sides audio power amplifier circuit, Bluetooth chip control circuit, bluetooth MIC circuit and single chip machine controlling circuit; The power end of said battery protecting circuit is connected to battery; The output of battery protecting circuit connects the input of power switch circuit; The output of the output of power switch circuit, peripheral hardware audio interface circuit is connected the input of commutation circuit with the output of Bluetooth chip control circuit; The output of commutation circuit connects the input of left and right sides audio power amplifier circuit, and the input/output terminal of left and right sides audio power amplifier circuit is connected the input/output terminal of single chip machine controlling circuit with the input/output terminal of Bluetooth chip control circuit, and the output of bluetooth MIC circuit connects the input of Bluetooth chip control circuit.

2. bluetooth sound equipment according to claim 1 is characterized in that: said commutation circuit is to be realized by two SPDT analog switch TS5A3157 and peripheral circuit thereof, and the source of sound between the audio frequency of realization peripheral hardware and the audio frequency that bluetooth receives switches.

3. bluetooth sound equipment according to claim 1 is characterized in that: the left audio power amplifier circuit of said left and right sides audio power amplifier circuit and right audio power amplifier circuit are realized by audio-frequency power amplifier HT6873 and peripheral circuit thereof respectively.

4. bluetooth sound equipment according to claim 1 is characterized in that: said Bluetooth chip control circuit is to be realized by Bluetooth chip BM21SPK01 and peripheral circuit thereof.

5. bluetooth sound equipment according to claim 1 is characterized in that: said single chip machine controlling circuit is to be realized by singlechip chip HT66F15 and peripheral circuit thereof.

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