CN214591943U - Portable flat resonance Bluetooth sound box - Google Patents

Abstract

The utility model discloses a portable flat resonance bluetooth speaker, including the core processing board that is located the casing, the core processing board includes audio frequency fixed point DSP treater, digital audio frequency bluetooth transmission module, D class audio amplifier, linear oscillator, audio frequency fixed point DSP treater links to each other with digital audio frequency bluetooth transmission module, two D class audio amplifiers, correction microphone respectively, and every D class audio amplifier all is connected with linear oscillator; the top of the shell is provided with an operation panel, the operation panel comprises a touch induction chip and induction keys, and the induction keys are connected with the audio fixed-point DSP processor through the touch induction chip. The sound box can be easily placed in a large pocket or a handbag, and the sound quality can be improved under different resonance environments, so that good listening experience is achieved.

Description

Portable flat resonance Bluetooth sound box

Technical Field

The utility model relates to a stereo set technical field, concretely relates to portable platyzization resonance bluetooth speaker.

Background

In recent years, although the bluetooth speaker on the market has the characteristics of light weight, small volume, good sound quality and the like, due to the cavity structure, the bluetooth speaker is difficult to realize flattening and has poor carrying experience. Meanwhile, although the resonant sound box in the prior art is not limited by a cavity structure, the popularization and the use of the resonant sound box are still greatly hindered due to the existence of a larger sound generating unit and poor tone quality.

SUMMERY OF THE UTILITY MODEL

The above-mentioned problem to prior art exists, the utility model provides a portable flat resonance bluetooth speaker, this audio amplifier can easily put into among big pocket or the handbag, and can improve tone quality under different resonance environment to reach good listening experience.

In order to achieve the purpose, the technical scheme of the application is as follows: a portable flat resonance Bluetooth sound box comprises a core processing board positioned in a shell, wherein the core processing board comprises an audio frequency fixed-point DSP (digital signal processor), a digital audio frequency Bluetooth transmission module, D-class audio frequency amplifiers and linear vibrators, the audio frequency fixed-point DSP is respectively connected with the digital audio frequency Bluetooth transmission module, the two D-class audio frequency amplifiers and a correction microphone, and each D-class audio frequency amplifier is connected with the linear vibrators; the top of the shell is provided with an operation panel, the operation panel comprises a touch induction chip and induction keys, and the induction keys are connected with the audio fixed-point DSP processor through the touch induction chip.

Furthermore, the bottom of the shell is provided with a fixed sucker, so that the vibration conduction effect is achieved.

Furthermore, the audio frequency fixed point DSP processor reduces the influence on the sound quality by correcting the environmental information collected by the microphone, and performs two-channel sound mixing, audio frequency spectrum separation, pressure limit, equalization and gain processing in the audio frequency fixed point DSP processor.

Further, the digital audio bluetooth transmission module transmits the audio bluetooth signal of the mobile terminal to the audio fixed-point DSP processor through the LDAC lossless transmission protocol or the audio transmission protocol.

Furthermore, the class D audio amplifier decodes and amplifies the processed digital audio signal and drives the linear vibrator to vibrate.

Furthermore, the induction key transmits the corresponding signal to the audio fixed-point DSP processor, the audio fixed-point DSP processor translates the signal into a song cutting, playing and pause command and then sends the command to the mobile terminal through the digital audio Bluetooth transmission module, the mobile terminal executes the corresponding command, and meanwhile, the mobile terminal can also send the similar command to the digital audio Bluetooth transmission module and the audio fixed-point DSP processor executes the command.

Furthermore, the linear vibrator is an FR-4 plate, so that signal energy loss is reduced.

Furthermore, the shell is made of plastic materials, and due to the thickness of the linear vibrator, the whole product can achieve the purpose of flattening.

As a further step, the power supply board is further included, a battery protection circuit and a power management chip are arranged on the power supply board, the power management chip is connected with the Type-C charging port, and the battery protection circuit is connected with the DSP power supply module, the boosting module and the 3.3v power supply module.

As a further step, the DSP power supply module, the voltage boost module, and the 3.3v power supply module adopt an economical small-sized switching power supply module to improve endurance, save energy, and reduce overall cost and power consumption.

The utility model discloses owing to adopt above technical scheme, can gain following technological effect: the application uses the audio frequency fixed point DSP processor, and makes up the shortcoming that the tone quality of the traditional resonance sound box is poor to a certain extent. The thickness of main components in the sound box is reduced to about 5mm through the linear vibrator, the length and the width are controlled within 10cm x 5cm, the sound box is more convenient to carry, and the space can be saved; the correction microphone can help the resonance sound box to improve the sound quality in different resonance environments so as to achieve good listening experience.

Drawings

FIG. 1 is an exploded view of a portable flattened resonant Bluetooth speaker;

FIG. 2 is an external view of a portable flat resonance Bluetooth speaker;

fig. 3 is a schematic block diagram of a portable flat resonance bluetooth speaker.

The sequence numbers in the figures illustrate: 1. an operation panel; 2. a Type-C charging port; 3. a touch sensing chip; 4. a power panel; 5. a battery; 6. a battery protection circuit; 7. a core processing board; 8. a correction microphone; 9. a class D audio amplifier; 10. a digital audio Bluetooth transmission module; 11. an audio fixed-point DSP processor; 12. a power supply module; 13. a charging management chip; 14. a linear vibrator; 15. a front housing; 16. a rear housing; 17. and fixing the sucker.

Detailed Description

The embodiment of the present invention is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are provided, but the present invention is not limited to the following embodiments.

Example 1

As shown in fig. 1-3, this embodiment provides a portable flat resonance bluetooth sound box, which includes a core processing board located in a housing, where the core processing board includes an audio fixed-point DSP processor, a digital audio bluetooth transmission module, a class D audio amplifier, and a linear vibrator, where the audio fixed-point DSP processor is respectively connected to the digital audio bluetooth transmission module, two class D audio amplifiers, and a correction microphone, and each class D audio amplifier is connected to the linear vibrator; the audio fixed-point DSP processing device is provided with an operation panel, wherein the operation panel comprises a touch induction chip and induction keys, and the induction keys are connected with the audio fixed-point DSP processing device through the touch induction chip. The correction microphone is the environment information source of the DSP, and the tone quality is improved by returning the actual sound production data to the DSP in different environments. The whole sound box adopts a full digital audio stream scheme, so that the layout is simple, and meanwhile, interference signals are prevented from entering the audio stream.

The casing comprises procapsid, back casing, and the casing top is operating panel, operating panel includes touch-sensitive chip and response button, the response button passes through touch-sensitive chip and links to each other with audio frequency fixed point DSP treater, and the casing bottom plate is fixed suction cup.

The audio fixed-point DSP processor reduces the influence on the tone quality by correcting the environmental information collected by the microphone, can adopt an ADAU1452 model, and has strong audio signal processing capacity and simple programming and packaging. The ADAU1452 interface can be connected with various digital audio devices, amplifiers and control circuits, including high-configuration serial port, I²C. A Serial Peripheral Interface (SPI), and multipurpose input/output (I/O) pins. And the DSP performs processing such as dual-channel sound mixing, audio frequency spectrum separation, pressure limit, equalization, delay, frequency division, gain and the like to improve the integral tone quality of the sound. The audio frequency fixed point DSP processor can also enhance the sound loudness, carry out audio frequency amplitude limiting operation, prevent the oscillator striking oscillator shell, prolong the oscillator life and avoid abnormal sound to appear. While ADAU1452 can pass through I²And C, adjusting register settings of the touch sensing chip, the audio amplifier and the digital audio Bluetooth transmission module by the bus, and forwarding the touch data to the digital audio Bluetooth transmission module.

And the digital audio Bluetooth transmission module transmits the audio Bluetooth signal of the mobile terminal to the audio fixed-point DSP through the LDAC lossless transmission protocol or the common audio transmission protocol. The digital audio Bluetooth transmission module can adopt an SXW8675 model, supports point-to-point and point-to-multipoint communication, connects data and voice devices into a piconet (Pico-net) in a wireless mode, and can further realize interconnection of a plurality of piconets to form a distributed network (scatter-net), thereby realizing quick and convenient communication among the connected devices. The SXW8675 digital audio bluetooth transmission module is a high-end single-chip solution based on the CSR8675 scheme, provides high-quality wireless audio performance, and supports the development of highly differentiated high-end wireless audio products. Integrated support for aptX, aptXHD, active noise reduction and high-pass TrueWireless stereo.

The D-type audio amplifier decodes and amplifies the processed digital audio signal and drives the linear vibrator to vibrate, wherein one of the D-type audio amplifier is suitable for a middle and high-pitch part, and the other D-type audio amplifier is suitable for a middle and low-pitch part. Both class D audio amplifiers can be of the TAS2770 type, which is a mono digital input class D audio amplifier optimized to efficiently drive small loudspeakers. The class D audio amplifier is capable of providing 15W of continuous power to an 8 Ω load at 16V, with a THD of 1%. The wide input voltage range of 4.5V to 16V and high output power make the amplifier extremely versatile and capable of being used with battery power or line powered systems. The under-voltage protector tracks the peak voltage and automatically limits the gain to the available voltage. This hardware implemented functionality reduces the amplifier's need for system power, thereby preventing audio interruptions and system shutdowns. The linear vibrator can be well protected by selecting the digital power amplifier with the I-V monitoring function.

The operation panel comprises a touch sensing chip and sensing keys, corresponding signals are transmitted to the DSP through connection with the touch sensing chip, the DSP translates the signals into song cutting, playing and pause commands and then sends the commands to the mobile terminal through the digital audio Bluetooth transmission module, the mobile terminal executes the corresponding commands, and meanwhile, the mobile terminal can also send similar commands to the digital audio Bluetooth transmission module and the DSP executes the commands.

The core processing board is an FR-4 board, so that signal energy loss is reduced, and the core processing board is combined with the vibrator to transmit sound wave vibration.

The power supply module comprises a DSP power supply module, a boosting module and a 3.3v power supply module, and can adopt TPS61088, TLV62568, ME6211C185G, TPS63802 and other high-efficiency and economical converters to supply power for the DSP, the linear oscillator, the D-type audio amplifier and each device, and prolong the endurance to the maximum extent. The fixed sucker can firmly adsorb the sound box on a smooth surface, or contact the surface of the paper box paper shell and the like by means of gravity, so that the effects of conducting vibration and making sound are achieved.

USB Type-C interface through with the cooperation of the management chip that charges, can realize practical function such as listening while dashing.

The power panel has reduced the volume through using flat soft packet of lithium cell, has placed battery protection circuit and temperature sensor in order to guarantee the charge-discharge safety of lithium cell in the vacant space.

When the loudspeaker box is used, the loudspeaker box is placed on a flat surface, and the suction surface of the suction disc is confirmed. Then press arbitrary button of operation panel for a long time, after the vibrations of clicking, this bluetooth speaker of usable mobile terminal connection. The digital audio signal of the mobile terminal enters a digital audio Bluetooth transmission module through an onboard antenna, and the module passes through I²The S bus is connected with the audio fixed-point DSP, and after the processing of double-channel sound mixing, audio frequency spectrum separation, pressure limit, equalization, gain and the like is carried out in the audio fixed-point DSP, the processed middle and middle tones pass through I²The S bus is transmitted into a digital power amplifier. The power amplifier sends the medium and low tones into one linear vibrator and sends the medium and high tones into the other single linear vibrator. Then, the vibration generated by the vibrator is transmitted to the vibrator plate. The oscillator board conducts vibrations to the external world (collapsible resonance box) again and realizes the sound production, and the stereo set can be according to the actual sound production situation automatic adjustment that detects and improve tone quality. The audio frequency fixed-point DSP processor and other devices are connected through I²The C bus connection sends control signals.

The functions of song cutting, playing, pausing and the like are realized by sensing the corresponding key identification on the key.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. A portable flat resonance Bluetooth sound box is characterized by comprising a core processing board positioned in a shell, wherein the core processing board comprises an audio frequency fixed-point DSP processor, a digital audio frequency Bluetooth transmission module, a D-class audio amplifier and a linear vibrator, the audio frequency fixed-point DSP processor is respectively connected with the digital audio frequency Bluetooth transmission module, the two D-class audio amplifiers and a correction microphone, and each D-class audio amplifier is connected with the linear vibrator; the top of the shell is provided with an operation panel, the operation panel comprises a touch induction chip and induction keys, and the induction keys are connected with the audio fixed-point DSP processor through the touch induction chip.

2. The portable flat resonance Bluetooth speaker as claimed in claim 1, wherein a fixing suction cup is disposed at the bottom of the housing.

3. The portable flat resonance bluetooth speaker as claimed in claim 1, wherein the audio fixed-point DSP processor collects the environmental information through a correction microphone to reduce the influence on the sound quality, and performs two-channel mixing, audio spectrum separation, pressure limiting, equalization, and gain processing in the audio fixed-point DSP processor.

4. The portable flat resonance Bluetooth speaker as claimed in claim 1, wherein the digital audio Bluetooth transmission module transmits the audio Bluetooth signal of the mobile terminal to the audio fixed-point DSP via LDAC lossless transmission protocol or audio transmission protocol.

5. The portable flattened resonance Bluetooth speaker as claimed in claim 4, wherein the class D audio amplifier decodes and amplifies the processed digital audio signal and drives the line vibrator to vibrate.

6. The portable flat resonance Bluetooth speaker as claimed in claim 1, wherein the induction keys transmit corresponding signals to the audio fixed-point DSP processor, the audio fixed-point DSP processor translates the signals into song-cutting, playing and pause commands, and then the commands are transmitted to the mobile terminal through the digital audio Bluetooth transmission module, and the mobile terminal executes the corresponding commands.

7. The portable flat resonance Bluetooth speaker of claim 1, wherein the linear vibrator is an FR-4 board.

8. The portable flat resonance bluetooth speaker as claimed in claim 1, wherein the housing is made of plastic material.

9. The portable flat resonance Bluetooth speaker of claim 1, further comprising a power panel, wherein the power panel is provided with a battery, a battery protection circuit and a power management chip, the power management chip is connected to the Type-C charging port, and the battery protection circuit is connected to the DSP power supply module, the boost module and the 3.3v power supply module.

10. The portable flat resonance Bluetooth speaker of claim 9, wherein the DSP power supply module, the boost module, and the 3.3v power supply module are switch power supply modules.

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