CN220833208U

CN220833208U - Audio electric toothbrush

Info

Publication number: CN220833208U
Application number: CN202322038906.XU
Authority: CN
Inventors: 张致诚
Original assignee: Guangzhou Stars Pulse Co Ltd
Current assignee: Guangzhou Stars Pulse Co Ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-04-26
Anticipated expiration: 2033-07-31

Abstract

An embodiment of the present application provides an audio electric toothbrush, including: the power amplifier comprises a processor module, a power amplifier module and a vibration motor which are electrically connected in sequence, wherein a first transmission channel and a second transmission channel are arranged between the processor module and the power amplifier module; the processor module is used for sending a cleaning signal to the power amplification module through the first transmission channel and sending an audio signal to the power amplification module through the second transmission channel; the power amplification module is used for amplifying the cleaning signal and the audio signal; the vibration motor is controlled by the amplified cleaning signal to perform cleaning motion, and the audio signal is controlled by the amplified audio signal to perform regular vibration and output sound with tone and rhythm through medium conduction. The embodiment of the application can avoid mutual interference or superposition of the cleaning signal and the audio signal when being transmitted through the same transmission channel, and simultaneously sends the cleaning signal and the audio signal to the power amplification module on the basis of ensuring independent transmission of the cleaning signal and the audio signal, thereby having higher signal transmission efficiency.

Description

Audio electric toothbrush

Technical Field

The application relates to the technical field of oral cavity cleaning, in particular to an audio electric toothbrush.

Background

The motor of the electric toothbrush drives the brush head to vibrate through high-frequency vibration, and the brush head is contacted with teeth or gums, so that the oral cavity of a user is cleaned. The inventor hopes in the research and development process that when the motor is driven by the audio signal, the motor can emit sound corresponding to the audio signal, namely, the motor can act like a loudspeaker and can emit meaningful sound. Therefore, how to transmit the audio signal to the motor to drive the motor to vibrate and sound is a problem to be solved.

Disclosure of utility model

The application provides an audio electric toothbrush, which is characterized in that a cleaning signal and an audio signal are respectively sent to a power amplification module through a first transmission channel and a second transmission channel, the power amplification module amplifies the cleaning signal and the audio signal and then sends the amplified cleaning signal and the amplified audio signal to a vibration motor, so that the vibration motor is controlled by the amplified cleaning signal to perform cleaning motion, the tooth cleaning function is realized, and the vibration motor is controlled by the audio signal to perform regular vibration and emit sound with tone and rhythm through medium conduction.

A first aspect of an embodiment of the present application provides an audio powered toothbrush comprising: the power amplifier comprises a processor module, a power amplifier module and a vibration motor which are electrically connected in sequence, wherein a first transmission channel and a second transmission channel are arranged between the processor module and the power amplifier module;

The processor module is used for sending a cleaning signal to the power amplification module through the first transmission channel and sending an audio signal to the power amplification module through the second transmission channel;

the power amplification module is used for amplifying the cleaning signal and the audio signal;

The vibration motor is controlled by the amplified cleaning signal to perform cleaning motion, and the audio signal is controlled by the amplified audio signal to perform regular vibration and output sound with tone and rhythm through medium conduction.

Further, the processor module controls the cleaning signal and the audio signal to be output synchronously or asynchronously in time sequence.

Further, the processor module controls the cleaning signal and the audio signal to be synchronously output in time sequence, and the power amplification module outputs the amplified cleaning signal and the audio signal to the vibration motor after superposition.

Further, the processor module controls the cleaning signal and the audio signal to be synchronously output to the power amplification module in time sequence, the power amplification module synchronously outputs the cleaning signal and the audio signal to the vibration motor respectively, and the vibration motor stacks the cleaning signal and the audio signal.

Further, the cleaning signal is a square wave signal.

Further, the audio signal is a two-channel signal, and the processor module outputs the audio signal of a single channel; or the processor module superimposes the audio signals of the two channels and outputs the superimposed audio signals.

Further, the processor module has two input-output ports;

the first transmission channel comprises a first transmission line, and two ends of the first transmission line are respectively connected with one of the input and output ports and the power amplifier module;

The second transmission channel comprises a second transmission line, and two ends of the second transmission line are respectively connected with the other input/output port and the power amplifier module;

The processor module outputs the cleaning signal to the power amplifier module through the first transmission line, and outputs the audio signal to the power amplifier module through the second transmission line.

Further, the processor module also has two control ports;

The first transmission line and the second transmission line are respectively provided with an electronic switch;

The audio electric toothbrush further comprises two control lines, wherein two ends of each control line are respectively connected with the control ports and the electronic switches in a one-to-one correspondence mode, so that the processor module controls the corresponding electronic switches to be turned on or turned off through the control lines.

Further, the processor module controls the cleaning signal and the audio signal to be synchronously output to the power amplifier module in time sequence, and the processor module controls only one of the two electronic switches to be conducted at the same time so as to asynchronously output the cleaning signal and the audio signal to the power amplifier module.

Further, the first transmission line and the second transmission line are both provided with impedance matching resistors.

Further, the power amplifier module includes:

The motor driving chip is electrically connected with the processor module and the vibration motor; and/or

And the sound power amplification chip is electrically connected with the processor module and the vibration motor.

Further, the processor module includes:

the processor is electrically connected with the power amplifier module;

The storage unit is a storage space on the processor or a memory electrically connected with the processor, and audio files corresponding to the audio signals are stored in the storage unit.

Further, the method further comprises the following steps:

The communication unit is electrically connected with the processor and is used for establishing communication connection with an external terminal, and the processor receives an audio file sent by the external terminal through the communication unit and sends a corresponding audio signal to the power amplification module according to the audio file; or alternatively

The processor is further configured to store the audio file received from the external terminal to the storage unit, and call the audio file in the storage unit when the audio signal needs to be output.

Further, the method further comprises the following steps:

And the audio decoding unit is electrically connected with the processor or integrated with the processor and is used for decoding the audio file to generate the audio signal, and the audio signal generated by decoding comprises amplitude information and frequency information.

Further, the cleaning signal is in a first frequency range and the audio signal is in a second frequency range, the second frequency range at least partially overlapping the first frequency range.

Further, the vibration motor is controlled by the amplified audio signal to perform regular vibration, and the sound transmitted by the medium is transmitted by the air, and the sound transmitted by the medium is less than or equal to 20 dB.

The embodiment of the application provides an audio electric toothbrush, wherein a processor module sends a cleaning signal to a power amplification module through a first transmission channel, and the processor module sends an audio signal to the power amplification module 70 through a second transmission channel, so that on one hand, mutual interference or superposition between the cleaning signal and the audio signal when the cleaning signal and the audio signal are transmitted through the same transmission channel can be avoided, and therefore, the power amplification module can receive the cleaning signal and the audio signal which have fewer noises and are purer, and the cleaning signal and the filtering signal can be amplified without noise reduction treatment. On the other hand, on the basis of guaranteeing that the cleaning signal and the audio signal are independently transmitted, the processor module can simultaneously send the cleaning signal and the audio signal to the power amplification module, and the signal transmission efficiency is higher. In addition, the power amplification module amplifies the cleaning signal and the audio signal to amplify the output power, and sends the amplified cleaning signal and the amplified audio signal to the vibration motor, so that the vibration motor is controlled by the amplified cleaning signal to perform cleaning motion, the tooth cleaning function is realized, the vibration motor is controlled by the audio signal to perform regular vibration, and sound with tone and rhythm is emitted through medium conduction.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an audio powered toothbrush in accordance with one embodiment of the present application;

FIG. 2 is a schematic diagram of a frame of an audio powered toothbrush in one embodiment of the application;

FIG. 3 is a schematic diagram of a frame of an audio powered toothbrush in accordance with yet another embodiment of the present application;

FIG. 4 is a schematic view of a frame of an audio powered toothbrush in accordance with yet another embodiment of the present application;

FIG. 5 is a schematic view of a frame of an audio powered toothbrush in accordance with another embodiment of the application;

FIG. 6 is a schematic diagram of a frame of an audio powered toothbrush in accordance with yet another embodiment of the application;

FIG. 7 is a schematic view of a frame of an audio powered toothbrush in accordance with yet another embodiment of the application;

Fig. 8 is a schematic view of a frame of an audio powered toothbrush in accordance with another embodiment of the application.

Description of the drawings: 100-audio electric toothbrush; 10-a handle; 20-cell; 30-a vibration motor; 40-a circuit board; 41-a first transmission channel; 411-a first transmission line; 412-a first electronic switch; 413-a first control line; 42-a second transmission channel; 421-a second transmission line; 422-a second electronic switch; 423-a second control line; 50-brushing head; a 60-processor module; 61-a processor; 62-a memory cell; 63-a communication unit; a 64-audio decoding unit; 601-input/output ports; 602-a control port; 70-a power amplifier module; 71-an acoustic power amplifier chip; 72-a motor driving chip; 721-PWM output circuitry; 722-H bridge drive circuit.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

Referring to fig. 1, an embodiment of the present application provides an audio powered toothbrush 100, the audio powered toothbrush 100 being used to clean a user's mouth, particularly a user's teeth. And the audio electric toothbrush 100 can also vibrate regularly through medium conduction, thereby realizing the sound production function.

In some embodiments, audio powered toothbrush 100 includes handle 10, battery 20, vibration motor 30, circuit board 40, and brush head 50. The battery 20, the vibration motor 30 and the circuit board 40 are all arranged in the handle 10, and an output shaft of the vibration motor 30 penetrates out of the handle 10 to be connected with the brush head 50, so that the brush head 50 is driven to vibrate through the vibration motor 30, and the tooth cleaning effect is achieved.

Referring to fig. 2, the audio electric toothbrush 100 includes a processor module 60 and a power amplifier module 70 disposed on a circuit board 40, wherein the processor module 60, the power amplifier module 70 and the vibration motor 30 are electrically connected in sequence, i.e. the processor module 60 is electrically connected with the power amplifier module 70, and the power amplifier module 70 is electrically connected with the vibration motor.

The processor module 60 is used for receiving and transmitting electrical signals and processing the electrical signals. By way of example, the processor module 60 may be a system-on-chip. The system-on-chip comprises at least a micro control unit (Microcontroller Unit; MCU). The microcontrol unit is also called a single chip Microcomputer (SINGLE CHIP microcomputers) or a single chip Microcomputer, which is to properly reduce the frequency and specification of a central processing unit (Central Process Unit; CPU), integrate a Memory (Memory), a counter (Timer), a USB (Universal Serial Bus ), an a/D (analog to digital conversion), a UART (Universal Asynchronous Receiver/Transmitter, universal asynchronous receiver Transmitter), a PLC (Programmable Logic Controller, a programmable logic controller), a DMA (Direct Memory Access, also called a group data transfer mode, sometimes called a direct Memory operation) and other peripheral interfaces, and even an LCD (Liquid CRYSTAL DISPLAY ) driving circuit on a single chip to form a chip-level computer, and perform different combination control for different application occasions.

With continued reference to fig. 2, further, a first transmission channel 41 and a second transmission channel 42 are provided between the processor module 60 and the power amplifier module 70. The first transmission channel 41 and the second transmission channel 42 are used for the processor module 60 to send driving signals including cleaning signals and audio signals to the power amplifier module 70.

The cleaning signal may be a square wave signal, for example. The square wave signal has fewer characteristics, simple waveform, generally rectangular wave signal, easy generation, and can be generated by the processor module 60 without pre-storing occupied storage space, and can be generated in real time when output is needed. Through setting up the generating parameter of square wave signal, can make the frequency variation scope of square wave signal less, can make square wave signal have single fixed frequency or change between several relatively fixed frequency, through setting up the duration of square wave signal on single frequency, can make square wave signal slowly change between several relatively fixed frequency, so, set up clean signal into square wave signal, can make clean signal's frequency comparatively stable, clean signal drive vibrating motor 30 vibration to drive brush head 50 vibration, can make brush head 50's vibration frequency relatively fixed on one or several frequencies that the clean tooth effect is better, and then improve clean tooth effect.

For example, different square wave signals can correspond to different brushing modes, and different square wave signals can have at least one of different frequencies, amplitudes, and duty cycles. For example, the audio powered toothbrush 100 includes a gentle mode, a moderate mode, and a aggressive mode in which brushing forces are sequentially increased, and the frequency of the square wave signal may be sequentially increased, and the amplitude of the corresponding square wave signal may be sequentially increased, corresponding to the three brushing modes. It will be appreciated that the square wave signal corresponding to the same brushing pattern can have a single frequency or single amplitude, or can have multiple different frequencies or multiple different amplitudes.

According to the related art, the sound frequency band which can be distinguished by the human ear is 20Hz-20KHz. Sound has three features: pitch, loudness, and timbre. Loudness is determined by the amplitude of the sound source vibration, the greater the amplitude, the greater the loudness (i.e., the greater the volume); the tone height is related to the vibration frequency, and the higher the frequency is, the higher the tone is; the tone color is determined by the characteristics of the sound source, such as materials, structures, etc., and the characteristics of waveforms corresponding to the audio signals are different.

The audio signals may be classified into regular audio signals and irregular audio signals according to their characteristics. The frequency, amplitude of the regular audio signal exhibits regular variations and carries speech information, music information or sound effect information. The present embodiment is described taking an audio signal as regular audio information as an example. Wherein the regular audio signals may in turn correspond to speech, music, sound effects, etc.

Specifically, the processor module 60 sends only the cleaning signal to the power amplifier module 70 through one of the first transmission channels 41. The first transmission channel 41 may have one or more. And the processor module 60 transmits only the audio signal to the power amplifier module 70 through one of the second transmission channels 42. The second transmission channel 42 may have one or more. The cleaning signal is transmitted through the first transmission channel 41 and the audio signal is transmitted through the second transmission channel 42, i.e. the cleaning signal and the audio signal are transmitted through different transmission channels. Thus, on the one hand, the cleaning signal and the audio signal are transmitted through different transmission channels, so that mutual interference between the cleaning signal and the audio signal transmitted through the same transmission channel can be avoided, and therefore, the power amplification module 70 can receive fewer noise, purer cleaning signal and audio signal, and can amplify the cleaning signal and the filtering signal without noise reduction treatment on the cleaning signal and the filtering signal. On the other hand, on the basis of ensuring that the cleaning signal and the audio signal are transmitted independently, the processor module 60 can send the cleaning signal and the audio signal to the power amplifier module 70 at the same time, so that the signal transmission efficiency is higher.

It will be appreciated that the types of signals transmitted by the first transmission channel 41 and the second transmission channel 42 may be interchanged, i.e. the processor module 60 only transmits audio signals to the power amplifier module 70 via one first transmission channel 41, and the processor module 60 only transmits cleaning signals to the power amplifier module 70 via one second transmission channel 42. The above effects can be achieved as well.

When the power amplification module 70 receives the cleaning signal, the power amplification module 70 is configured to amplify the cleaning signal to amplify the output power. When the power amplification module 70 receives the audio signal, the power amplification module 70 is configured to amplify the audio signal to amplify the output power; when the power amplification module 70 receives the cleaning signal and the audio signal at the same time, the power amplification module 70 is configured to amplify the cleaning signal and the audio signal to amplify the output power.

The reason why the driving signal is amplified is that the amplitude of the driving signal outputted from the processor module 60 is relatively small, the output power is small, the driving capability is weak, and the vibration motor 30 cannot be driven to vibrate. The driving signal is amplified by the power amplification module 70, and the output power is amplified, so that the driving capability of the driving signal is improved, and the vibration motor 30 can vibrate under the driving of the driving signal, so that the cleaning motion is realized or the regular vibration is realized, and the sound is transmitted through the medium.

For example, the medium may be air, that is, the vibration motor 30 transmits regular vibration to air to form sound waves and to the human ear, or the vibration motor 30 transmits the regular vibration to the brush head 50 through an output shaft, the brush head 50 transmits the regular vibration to air to form sound waves and to the human ear, or the brush head 50 contacts with teeth of the user to transmit the regular vibration to the human ear in a bone conduction manner.

It should be noted that the specific implementation manner of the power amplifier module 70 is various, for example, the driving signal may be amplified by a motor driving chip or by an audio power amplifier chip. This embodiment is not limited thereto.

After the vibration motor 30 receives the amplified cleaning signal, the vibration motor 30 is controlled to perform a cleaning motion by the amplified cleaning signal. When the vibration motor 30 performs cleaning motion, the brush head 50 is driven to vibrate synchronously through the output shaft, and when the brush head 50 contacts with the oral cavity of a user, the brush head 50 can clean the oral cavity of the user, so that the tooth cleaning function is realized.

After the vibration motor 30 receives the amplified audio signal, the audio signal includes amplitude information and frequency information, that is, the audio signal has one of different frequencies and different amplitudes in different periods, so that the vibration motor 30 generates vibrations with different frequencies, or generates vibrations with different amplitudes, or generates vibrations with different frequencies and different amplitudes. If the vibration frequency of the vibration motor 30 corresponds to frequency information of a voice, music, or sound to be played, the vibration motor 30 will generate the corresponding voice, music, or sound through the conductive action of the medium.

Specifically, the frequency information in the audio signal determines the vibration frequency of the vibration motor 30, and corresponds to the pitch of the finally emitted sound, and the duration corresponding to a certain frequency information corresponds to the duration of the finally emitted pitch, and different pitches may have the same or different durations to form a corresponding rhythm. Accordingly, the vibration motor 30 is controlled by the amplified audio signal to generate regular vibrations, and finally emits sounds having tones and rhythms through the conduction of the medium.

The sound output from the vibration motor 30 may be at least one of voice, music, and sound effects. The vibration motor 30 may transmit sound to the brush head 50 through the output shaft, and when the brush head 50 contacts with the user's oral cavity (e.g., teeth or gums), the brush head 50 further transmits vibration to the oral cavity, which further transmits vibration to the user's inner ear, thereby transmitting the sound emitted from the vibration motor 30 to the human ear in a bone conduction manner. Specifically, bone conduction is a sound conduction mode, i.e., converting sound into mechanical vibrations of different frequencies, and transmitting sound waves through the skull, bone labyrinth, inner ear lymph, screw, auditory center of a person.

By bone conduction, a solid-state sound transmission manner can be achieved with a user hearing a louder, sharper sound than if the sound were transmitted to the user's ear through air, with the same power amplification of the power amplification module 70. In other words, compared with air propagation, on the premise that the same volume or loudness of sound can be heard, the power amplifier module 70 can drive the vibration motor 30 and the sound with the corresponding loudness of the bone conduction medium only by using a smaller amplification factor in a manner of propagating the sound through bone conduction, so that the energy consumption of the power amplifier module 70 can be reduced, the service time of the audio electric toothbrush 100 can be prolonged, and the endurance can be improved.

In addition, bone conduction omits many sound wave transmission steps relative to the transmission of sound through air, can realize clear sound restoration in noisy environments, and the sound waves cannot influence others due to diffusion in the air. The manner in which sound is transmitted through bone conduction also helps the hearing impaired person hear the sound ultimately emitted by the vibration motor 30 and the bone conduction medium.

In summary, in the present embodiment, the processor module 60 sends the cleaning signal to the power amplification module 70 through the first transmission channel 41, and the processor module 60 sends the audio signal to the power amplification module 70 through the second transmission channel 42, so that on one hand, interference or superposition between the cleaning signal and the audio signal when the cleaning signal and the audio signal are transmitted through the same transmission channel can be avoided, and therefore, the power amplification module 70 can receive the cleaning signal and the audio signal with less noise and purer quality, without performing noise reduction processing on the cleaning signal and the filtering signal, and can amplify the cleaning signal and the filtering signal. On the other hand, on the basis of ensuring that the cleaning signal and the audio signal are transmitted independently, the processor module 60 can send the cleaning signal and the audio signal to the power amplifier module 70 at the same time, so that the signal transmission efficiency is higher. In addition, the power amplification module 70 amplifies the cleaning signal and the audio signal to amplify the output power and transmits the amplified cleaning signal and the audio signal to the vibration motor 30, thereby enabling the vibration motor 30 to be controlled by the amplified cleaning signal to perform cleaning motion, realizing a tooth cleaning function, and enabling the vibration motor 30 to be controlled by the audio signal to perform regular vibration and emitting sound with tone and rhythm through medium conduction.

In some embodiments, the processor module 60 controls the cleaning signal and the audio signal to be output asynchronously in time sequence, that is, when the processor module 60 transmits the cleaning signal to the power amplifier module 70 through the first transmission channel 41, the processor module 60 does not transmit the audio signal, or the processor module 60 transmits the audio signal, but the second transmission channel 42 is in an off state such that the audio signal cannot be transmitted to the power amplifier module 70; in contrast, when the processor module 60 transmits the audio signal to the power amplifier module 70 through the second transmission channel 42, the processor module 60 does not transmit the cleaning signal, or the processor module 60 transmits the cleaning signal, but the first transmission channel 41 is in an off state, so that the cleaning signal cannot be transmitted to the power amplifier module 7090. In this way, on the one hand, electromagnetic interference between the cleaning signal and the audio signal can be avoided when the cleaning signal and the audio signal are synchronously transmitted, and noise in the cleaning signal and the audio signal received by the power amplification module 70 is reduced.

On the other hand, the power amplifier module 70 only receives the cleaning signal or the audio signal at the same time, so that only one of the cleaning signal or the audio signal needs to be amplified, and compared with amplifying the cleaning signal and the audio signal at the same time, the work load of the power amplifier module 70 can be reduced, the excessive heating value is avoided, and the practical life of the power amplifier module 70 is prolonged.

On the other hand, since the power amplification module 70 receives the cleaning signal and the audio signal asynchronously, the power amplification module 70 can directly output the cleaning signal and the audio signal asynchronously, that is, the amplified cleaning signal and audio signal are also sent to the vibration motor 30 asynchronously, so that the problem that the vibration motor 30 is driven by the cleaning signal and the audio signal simultaneously and generates two movements, the two movements interfere with each other, resulting in low movement efficiency and even the problem that the vibration motor 30 is locked and stalled can be avoided.

It should be understood that the power amplifier module 70 may also include a delay unit for delaying the cleaning signal (or the audio signal) received earlier and outputting the delayed cleaning signal together with the audio signal received later, so that the vibration motor 30 receives the cleaning signal and the audio signal simultaneously. To address the problem of motion clutter caused by simultaneous driving of the vibration motor 30 with the cleaning signal and the audio signal, the processor module 60 may adjust at least one of the cleaning signal and the audio signal prior to transmission, such as reducing the amplitude of the cleaning signal, to address the problem of motion clutter.

The processor module 60 controls the cleaning signal and the audio signal to be output asynchronously in time sequence so that the vibration motor 30 switches between the cleaning motion and the regular vibration and outputs the sound, with its specific application scenario. Illustratively, the audio signal corresponds to a reminder sound for reminding output by the vibration motor 30. The reminding sounds include, but are not limited to, an over-voltage reminding sound, a zone change reminding sound, an improper operation reminding sound, and the like, and the corresponding reminding sound is required to be output only when the zone change reminding, the over-voltage reminding or the improper operation reminding is required to be performed, so that the processor module 60 outputs the corresponding audio signal only when the corresponding conditions of the zone change reminding, the over-voltage reminding or the improper operation reminding are met, and drives the vibration motor 30 to output the corresponding reminding sound. At this time, the processor module 60 outputs only the audio signal corresponding to the reminding sound, and does not output the cleaning signal, and when the sound reminding is not required, the processor module 60 outputs only the cleaning signal. In this way, the cleaning signal can independently drive the vibration motor 30 to perform cleaning motion, so that the effect of cleaning teeth is better without being influenced by an audio signal; similarly, the audio signal can be used for independently driving the vibration motor 30 to vibrate and sound, so that the influence of the cleaning signal is avoided, the noise is reduced, and the sound quality of sound production is improved.

In other embodiments, the processor module 60 controls the cleaning signal and the audio signal to be output synchronously in time sequence, that is, while the processor module 60 sends the cleaning signal to the power amplification module 70 through the first transmission channel 41, the processor module 60 sends the audio signal to the power amplification module 70 through the second transmission channel 42, so that the cleaning signal and the audio signal are sent to the power amplification module 70 at the same time, the signal transmission efficiency can be improved, and as to electromagnetic interference which may exist when the first transmission channel 41 and the second transmission channel 42 simultaneously transmit the signals, the first transmission channel 41 and the second transmission channel 42 can be isolated electromagnetically through the isolation element, so that electromagnetic interference between the first transmission channel 41 and the second transmission channel 42 is reduced. The isolation element may be a metal plate between the first transmission channel 41 and the second transmission channel 42, or may be an isolation cladding that is wrapped between the first transmission channel 41 and the second transmission channel 42, which is not limited in this embodiment.

When the processor module 60 controls the cleaning signal and the audio signal to be synchronously output in time sequence, the power amplification module 70 receives the cleaning signal and the audio signal at the same time, and the power amplification module 70 can amplify the cleaning signal and the audio signal at the same time, so that the working efficiency of the power amplification module 70 is improved. As for the problem that the heat productivity of the power amplifier module 70 is too large, the problem can be solved by structural design (for example, a heat dissipation hole is formed in the handle 10) or adding a heat dissipation element (for example, a cooling fin) or circuit design (for example, two power amplifier modules 70 with a relatively far interval are arranged to amplify the cleaning signal and the audio signal respectively, so that the heat productivity of a single power amplifier module 70 is reduced, and the heat dissipation is carried out at a relatively far distance).

Since the power amplifier module 70 receives the cleaning signal and the audio signal synchronously, the power amplifier module 70 can output the cleaning signal and the audio signal directly synchronously, that is, the amplified cleaning signal and audio signal are also sent to the vibration motor 30 synchronously, so that the vibration motor 30 can be prevented from being driven by the cleaning signal and the audio signal simultaneously and generating two movements. As for the problem of motion disturbance caused by simultaneous driving of the cleaning signal and the audio signal by the vibration motor 30, the processor module 60 may adjust at least one of the cleaning signal and the audio signal, for example, reduce the amplitude of the cleaning signal, before transmitting to solve the problem of motion disturbance.

It can be appreciated that the power amplification module 70 may also include a delay unit, so that the power amplification module 70 outputs the cleaning signal (or the audio signal) which is not delayed first and the audio signal (or the cleaning signal) which is delayed later by delaying the cleaning signal or the audio signal, so that the vibration motor 30 receives the cleaning signal and the audio signal asynchronously, and the problem of motion confusion caused by simultaneous driving of the cleaning signal and the audio signal of the vibration motor 30 can be effectively solved.

The processor module 60 controls the cleaning signal and the audio signal to be output in synchronization in time sequence so that the vibration motor 30 regularly vibrates and outputs sound while performing the cleaning motion, and also has a specific application scenario thereof. For example, when the user needs to brush teeth and output background music, the processor module 60 needs to control the cleaning signal and the audio signal corresponding to the background music to be synchronously output in time sequence, and the power amplifier module 70 simultaneously amplifies the cleaning signal and the audio signal and synchronously transmits the amplified cleaning signal and audio signal to the vibration motor 30, so as to drive the vibration motor 30 to perform cleaning motion and regularly vibrate and output the background music. Therefore, the function that the user brushes teeth and listens to songs can be achieved, and comfort level of the user during brushing teeth is improved.

In some embodiments, the processor module 60 controls the cleaning signal and the audio signal to be output synchronously in time sequence, and the power amplifier module 70 superimposes the amplified cleaning signal and the audio signal, which is equivalent to combining the cleaning signal and the audio signal into one signal and outputting the signal to the vibration motor 30, and the vibration motor 30 is driven by only one combined signal, so that the problem of motion confusion caused by that the vibration motor 30 is driven by the cleaning signal and the audio signal independently at the same time can be solved.

In still other embodiments, the processor module 60 controls the cleaning signal and the audio signal to be output to the power amplifier module 70 synchronously in time sequence, the power amplifier module 70 outputs the cleaning signal and the audio signal to the vibration motor 30 synchronously, and the vibration motor 30 superimposes the cleaning signal and the audio signal. To avoid motion clutter caused by the vibration motor 30 being driven independently by both the cleaning signal and the audio signal, the processor module 60 may adjust at least one of the cleaning signal and the audio signal prior to transmission, such as reducing the amplitude of the cleaning signal, to address the problem of motion clutter.

In order to realize stereo output, an audio signal decoded according to an audio file is usually a binaural signal, and the binaural signal is output to two vibration sources (for example, two speakers) through two channels, thereby realizing stereo output. In some embodiments of the present application, when the audio signal is a binaural signal, the audio signal of a single channel is sent to the power amplification module 70 through the second transmission channel 42, so that after the power amplification module 70 amplifies the audio signal of the single channel, the vibration motor 30 is driven to vibrate regularly and realize sounding through the conduction of the medium. On the contrary, if the signals of the two channels of the audio signal are sent to the power amplification module 70 through the first transmission channel 41 and the second transmission channel 42, the power amplification module 70 amplifies the signals of the two channels of the audio signal and sends the amplified signals to the vibration motor 30, and if the first transmission channel 42 also transmits the cleaning signal, the vibration motor 30 is driven by the signals of the two channels and the cleaning signal at the same time, so that multiple movements of the vibration motor 30 are mutually interfered, resulting in low movement efficiency and even dead and stalling of the vibration motor 30.

In some embodiments, the processor module 60 outputs an audio signal of a single channel such that the power amplifier module 70 receives only the audio signal of the single channel. Specifically, the audio signal first acquired by the processor module 60 may be a single-channel audio signal, and the single-channel audio signal is sent to the power amplifier module 70 through the second transmission channel 42. Or the audio signal obtained by the processor module 60 is a two-channel audio signal, and the processor module 60 extracts one channel audio signal from the two-channel audio signal and sends the extracted two-channel audio signal to the power amplifier module 70 through the second transmission channel 42.

In other embodiments, the processor module 60 superimposes the two audio signals and combines them into a mono audio signal, which is then output to the power amplifier module 70 through the second transmission channel 42. In this way, on the one hand, the problem of motion confusion of the vibration motor 30 caused when signals of two channels of the two-channel audio signal are respectively output can be solved. On the other hand, the signals of the two channels respectively have different music details, for example, the left channel signal includes the sound details sent by the musical instrument, the right channel includes the details of the human voice, the signals of the two channels are overlapped and then the vibration motor 30 is driven to regularly vibrate and output the sound, so that more music details can be output, and further the user experience is improved.

It should be noted that the audio signal may be more than two audio signals, and referring to the above embodiment, the processor module 60 may extract a single audio signal and send the single audio signal to the power amplifier module 70. It is understood that there may be a plurality of second transmission channels 42 between the processor module 60 and the power amplifier module 70. For example, the audio signal is a five-channel signal, and there are five second transmission channels 42 between the processor module 60 and the power amplifier module 70, which correspond to the five-channel signal one by one, but only 1 second transmission channel 42 of the five second transmission channels 42 is in an on state, so that the audio signal of a single channel is sent to the power amplifier module 70.

Referring to fig. 3, in some embodiments, the processor module 60 has two input/output ports 601, and the two input/output ports 601 are used for outputting a cleaning signal and an audio signal, respectively.

Further, the first transmission channel 41 includes a first transmission line 411, two ends of the first transmission line 411 are respectively connected with one of the input/output ports 601 and the power amplifier module 70, and the processor module 60 can send a cleaning signal to the power amplifier module 70 through the input/output ports 601 and the first transmission line 411 in sequence. That is, the transmission of the cleaning signal is realized through the first transmission line 411, and the structure is simple and the cost is low.

Further, the second transmission channel 42 includes a second transmission line 421, two ends of the second transmission line 421 are respectively connected to the other input/output port 601 and the power amplifier module 70, and the processor module 60 can send an audio signal to the power amplifier module 70 through the input/output port 601 and the second transmission line 421 in sequence. That is, the transmission of the audio signal is realized through the second transmission line 411, and the structure is simple and the cost is low.

Further, the processor module 60 further has two control ports 602, the control ports 602 are configured to output on-off control signals, and the first transmission line 411 and the second transmission line 421 are both provided with electronic switches (as shown in fig. 3, the first electronic switch 412 is disposed on the first transmission line 411, and the second electronic switch 422 is disposed on the second transmission line 421).

Further, the audio electric toothbrush 100 further includes two control lines (as shown in fig. 3, a first control line 413 is connected to the first electronic switch 412, a second control line 423 is connected to the second electronic switch 422), two ends of the control lines are respectively and electrically connected to the control ports 602 and the corresponding electronic switches in a one-to-one correspondence manner, and the processor module 60 sequentially sends on-off control signals to the corresponding electronic switches through the control ports 602 and the corresponding control lines, so that the processor module 60 controls on-off of the electronic switches.

In this way, the processor module 60 controls on/off of the corresponding electronic switch by controlling one of the control ports 602 and the corresponding control line, so that one of the first transmission line 411 and the second transmission line 421 is in an on state, and the other is in an off state, when the processor module 60 controls the cleaning signal and the audio signal to be output synchronously in time sequence, the processor module 60 can send the cleaning signal to the power amplifier module 70 through the first transmission line 411 in the on state, but cannot send the audio signal to the power amplifier module 70 through the second transmission line 421 in the off state. Conversely, the processor module 60 may send an audio signal to the power amplifier module 70 through the second transmission line 421 in the on state, but may not send a cleaning signal to the power amplifier module 70 through the first transmission line 411 in the off state, so that the power amplifier module 70 asynchronously receives the cleaning signal and the audio signal.

In some embodiments, the first transmission line 411 and the second transmission line 421 are respectively provided with an impedance matching resistor, so that transmission loss of the first transmission line 411 and the second transmission line 421 can be reduced, and transmission efficiency of the first transmission line 411 and the second transmission line 421 can be improved.

Referring to fig. 4, in some embodiments, the power amplifier module 70 includes an audio power amplifier chip 71, and the audio power amplifier chip 71 is electrically connected to the processor module 60 and the vibration motor 30, and amplifies the driving signal through the audio power amplifier chip 71. The acoustic power amplifier chip 71 has advantages of high fidelity and low distortion ratio, and can improve the output quality of the amplified audio signal to improve the sound quality.

Referring to fig. 5, in some embodiments, the power amplifier module 70 includes a motor driving chip 72, and the motor driving chip 72 is electrically connected to the processor module 60 and the vibration motor 30, and amplifies the driving signal by the motor driving chip 72. In contrast, the acoustic power amplifier chip 71 needs to consume more power and generate more heat to achieve the same amplification and driving capability as the motor driver chip 72; the motor driving chip 72 amplifies the driving signal, and the played sound quality effect is slightly bad, but the motor driving chip 72 has a larger amplifying ratio and a higher accuracy control capability, so that the vibration motor 30 can be controlled more accurately, and the adaptation degree of the motor driving chip 721 and the vibration motor 30 can be improved through the teaching, so that the working state of the vibration motor 30 is better, and the audio electric toothbrush 100 has a better cleaning effect.

In some embodiments, considering the long endurance requirements of the user on the audio electric toothbrush 100, the better tooth cleaning effect, and the fact that the vibration motor 30 is used as the sounding sound source, the high fidelity and low distortion parameters are not sensitive, that is, the driving signal is amplified by the motor driving chip 72, and the quality of the finally emitted sound is not too different when the user listens compared with the driving signal amplified by the sound power amplifying chip 71. Therefore, the motor driving chip 72 is selected to amplify the driving signal, so that the vibration motor 30 can vibrate regularly and generate sound through medium conduction on the basis of realizing longer endurance and better tooth cleaning effect of the audio electric toothbrush 100. For example, the motor drive chip 72 may be of the type UPT8517.

It is understood that the power amplifier module 70 may include both an audio power amplifier chip 71 and a motor driver chip 72. The acoustic power amplifier chip 71 and the motor driver chip 72 are connected in parallel between the processor module 60 and the vibration motor 30. When only the cleaning signal is needed, or the cleaning signal and the audio signal are needed to be amplified, the processor module 60 controls the motor driving chip 72 to amplify the cleaning signal, or the cleaning signal and the audio signal, so as to ensure a better tooth cleaning effect.

Conversely, when the brushing head 50 is not needed, but the sound is needed to be output, the audio signal sent by the processor module 60 can be amplified by the audio power amplification chip 71, so that the amplified audio signal has higher fidelity and lower distortion ratio, and the final sounding quality is improved.

In some embodiments, the power amplification factor of the motor driving chip 72 is greater than or equal to 30 and less than or equal to 45, so that the motor driving chip 72 can amplify the driving signal by a sufficient factor, so that the driving signal has a sufficiently large amplitude (or output power), so that the vibration motor 30 can be driven to vibrate, and the vibration motor 30 can be ensured to have proper loudness when vibrating regularly and sounding through medium conduction, and the user cannot hear the unclear sound due to insufficient loudness, and the sound is not broken due to too large loudness.

When the power amplification factor of the motor driving chip 72 is smaller than 30, the power amplification factor of the motor driving chip 72 is too small, and the amplified driving signal may not drive the vibration motor 30 to vibrate, or when the driving signal drives the vibration motor 30 to vibrate regularly and make a sound through medium conduction, the loudness is insufficient, so that a user cannot hear the sound corresponding to the regular vibration; when the power amplification factor of the motor driving chip 72 is greater than 45, the power amplification factor of the motor driving chip 72 is too large, and the amplified driving signal drives the vibration motor 30 to vibrate regularly and the loudness of sound emitted through medium conduction is too large, so that the probability of sound breaking increases sharply, and finally, the sound corresponding to the regular vibration is difficult for the user to hear.

In some embodiments, the voltage magnification of the motor drive chip 72 is greater than or equal to 1.2 and less than or equal to 1.8. In this way, the motor driving chip 72 can amplify the voltage of the driving signal by a sufficient multiple, so that the driving signal has a sufficient amplitude, thereby driving the vibration motor 30 to vibrate, and ensuring that the vibration motor 30 has proper loudness when vibrating regularly and sounding through medium conduction, and the user will not hear the unclear sound due to insufficient loudness, and the sound will not be broken due to too large loudness.

When the voltage amplification factor of the motor driving chip 72 is smaller than 1.2, the voltage amplification factor of the motor driving chip 72 is too small, and the amplified driving signal may not drive the vibration motor 30 to vibrate, or the loudness is insufficient when the driving signal drives the vibration motor 30 to vibrate regularly and make a sound through medium conduction, so that a user cannot hear the sound corresponding to the regular vibration; when the voltage amplification factor of the motor driving chip 72 is greater than 45, the voltage amplification factor of the motor driving chip 72 is too large, and the amplified driving signal drives the vibration motor 30 to vibrate regularly and the loudness of sound emitted through medium conduction is too large, so that the probability of sound breaking increases sharply, and finally, the sound corresponding to the regular vibration is difficult for the user to hear.

As known from the knowledge of the related art, when the sound propagated through the air is lower than 20 db, the user cannot hear the sound. In some embodiments, the vibration motor 30 is controlled to vibrate regularly by the amplified audio signal and the sound emitted by the medium conduction is less than or equal to 20 db through air propagation. Thus, only the user who is currently brushing his teeth with the audio toothbrush 100 can hear the sound outputted from the audio toothbrush 100 through bone conduction, but other people cannot hear the sound outputted from the audio toothbrush 100 through air propagation, so that the privacy of the user who is currently brushing his teeth with the audio toothbrush 100 is protected, and noise to other people can be avoided.

Referring to fig. 6, in some embodiments, the motor driving chip 72 includes a PWM output circuit 721 and an H-bridge driving circuit 722. The PWM output circuit 721 is electrically coupled to the processor module 60 for outputting a driving signal to the H-bridge driving circuit 722. Specifically, the PWM output circuit 721 is configured to output a driving signal in the form of a PWM signal to control the rotation speed of the vibration motor 30, and different PWM signals have different duty ratios, voltage values, and current values, so that the rotation speed of the vibration motor 30 can be adjusted by the H-bridge driving circuit 722.

The H-bridge driving circuit 722 is electrically connected to the vibration motor 30 and the PWM output circuit 721, and the H-bridge driving circuit 722 is used for directly controlling the steering and start-stop of the vibration motor 30, that is, the H-bridge driving circuit 722 is used for controlling the vibration motor 30 to start and vibrate or stop working, and the H-bridge driving circuit is also used for controlling the vibration motor 30 to vibrate reciprocally in two opposite directions according to the frequency information and the amplitude information contained in the amplified driving signal, wherein the vibration frequency of the vibration motor 30 corresponds to the frequency information contained in the driving signal, and the vibration amplitude of the vibration motor 30 corresponds to the amplitude information contained in the driving signal.

Referring to fig. 6, in some embodiments, the H-bridge driving circuit 722 and the PWM output circuit 721 are integrated into the processor module 60, i.e., the motor driving chip 72 is integrally integrated into the processor module 60. Thus, the integration level of the motor driving chip 72 and the processor module 60 is high, the creepage distance between the processor module 60 and the motor driving chip 72 is short, short-distance transmission of driving signals can be realized, and external electromagnetic interference is reduced.

Referring to fig. 7, in some embodiments, the H-bridge driving circuit 722 is a discrete device, so that the position of the H-bridge driving circuit 722 is flexibly set, and flexible wiring between the H-bridge driving circuit 722 and the vibration motor 30 is also facilitated, for example, the H-bridge driving circuit 722 may be disposed closer to the vibration motor 30, so that the amplified driving signal is sent to the vibration motor 30 in a short distance. Moreover, the H-bridge driving circuit 722, the PWM output circuit 721 and the processor module 60 generate heat during operation, especially the H-bridge driving circuit 722 generates higher heat due to frequent switching, and the H-bridge driving circuit 722 can be far away from the processor module 60 and the PWM output circuit 721, so that heat transfer between the H-bridge driving circuit 722 and the PWM output circuit 721 is reduced, and independent heat dissipation of the H-bridge driving circuit 42 is facilitated.

In addition, the PWM output circuit 721 is integrated in the processor module 60, so that the PWM output circuit 721 and the processor module 60 are highly integrated, and the creepage distance between the processor module 60 and the PWM output circuit 721 is relatively short, so that the short-distance transmission of the driving signal can be realized, and the external electromagnetic interference is reduced. The PWM output circuit 721 is electrically connected to the vibration motor 30 through the H-bridge driving circuit 722, that is, the PWM output circuit 721 is configured to generate and output a PWM driving signal, and the PWM driving signal is transmitted to the H-bridge driving circuit 722 for amplification, so that the H-bridge driving circuit 722 drives the vibration motor 30 to vibrate.

In some embodiments, the H-bridge driving circuit 722 includes a MOS transistor (MOS is an abbreviation of MOSFET, which is collectively referred to as Metal-Oxide-Semiconductor Field-Effect Transistor, meaning a Metal-Oxide semiconductor field effect transistor), and amplifies the driving signal through the MOS transistor, so that the power amplification of the driving signal by the H-bridge driving circuit 722 can be controlled more accurately to control the vibration motor 30 to vibrate more accurately.

In contrast, the audio amplifier chip 71 includes an analog front end and a digital signal processor module 60 (DSP, digital Signal Processing). The analog front end receives the analog audio signal from the processor module 60, and performs signal amplification and processing through an operational amplifier to convert the analog audio signal into a digital signal. The digital signal processor module 60 processes the digital signal, including filtering, equalization, reverberation, equalizer, etc. The acoustic power amplifier chip 71 is more focused on recovering the original analog audio signal to improve fidelity and reduce distortion rate, thereby achieving the effect of improving sound quality.

Referring to fig. 8, in some embodiments, the processor module 60 includes a processor 61 and a memory unit 62. The processor 61 is electrically connected to the power amplifier module 70, and the processor 61 is configured to send a driving signal to the power amplifier module 70. The model of processor 61 may be, for example, ESP32-C3.

The storage unit 62 stores therein an audio file corresponding to the audio signal, and the processor 61 may generate the corresponding audio signal based on the audio file in the storage unit 62. The format of the audio file may not be limited in this embodiment. By way of example, the audio file may be in the format of MP3, WAV, WMA, MP, flac, MIDI, RA, APE, AAC, CDA, MOV, or the like.

In one aspect, the storage unit 62 may pre-store audio files, and the processor 61 invokes the audio files pre-stored in the storage unit 62 and generates corresponding audio signals only when the audio needs to be played, so that the audio toothbrush 100 may selectively play audio at a more flexible time. If the storage unit 62 is not provided, in order to sound the audio toothbrush 100, the audio toothbrush 100 must receive an audio file or an audio signal from an external terminal in real time, and the audio toothbrush 100 must be capable of communicating with the external terminal, so that the hardware cost and the power consumption are high.

On the other hand, the storage unit 62 may store audio files of various sizes and formats, so that the audio toothbrush 100 may output more diversified sounds, for example, the audio toothbrush 100 may output longer sounds, may output the entire song as background music, and the user may accompany the background music that is not repeatedly played during the entire brushing process; for another example, the storage unit 62 stores audio files corresponding to the mode sounds corresponding to different brushing modes, so that the audio toothbrush 100 can output different mode sounds in different brushing modes, so as to facilitate the user to recognize the switching process of the brushing mode or to recognize the current brushing mode.

By way of example, the memory unit 62 may be a memory space on the processor 61, i.e. the processor 61 is self-contained. Illustratively, when processor 61 is model ESP32-C3, processor 61 has a Flash memory (Flash memory) with a memory space of 2M. Flash memory is a non-volatile memory device. Compared with the external memory, the internal memory is directly connected with the processor 61, has high reading and writing speed, is used for storing instructions and data of the current running program, and is directly used for exchanging information with the processor 61, so that the processing speed of processing can be increased.

Alternatively, the storage unit 62 may be a memory electrically connected to the processor 61. The memory can be an internal memory or an external memory, and the space size of the memory can be designed according to actual needs, so that the memory can store audio files with higher tone quality, longer playing time or a plurality of different sounds. In comparison, the memory space on the processor 61 is generally smaller, and the memory can be set as required, so that audio files with various sizes and formats can be stored, so that the audio toothbrush 100 can output more diversified sounds, and more sound output options can be provided for users.

With continued reference to fig. 8, in some embodiments, the audio electric toothbrush 100 further includes a communication unit 63, where the communication unit 63 is electrically connected to the processor 61 and is used to establish a communication connection with an external terminal. After the communication connection with the external terminal is established through the communication unit 63, the external terminal is operated to send an audio file to the audio electric toothbrush 100, or the audio electric toothbrush 100 is operated to send a corresponding control instruction to the external terminal, so that the external terminal sends the audio file to the audio electric toothbrush 100, the audio electric toothbrush 100 receives the audio file through the communication unit 63, that is, the processor 61 receives the audio file sent by the external terminal through the communication unit 63, and subsequently, the processor 61 can generate a corresponding audio file according to the audio file and send a corresponding audio signal to the power amplification module 70, so as to control the vibration motor 30 to sound.

The communication unit 63 may be a wired connection module, such as a Type-C interface, a Type-a interface, or the like. Or may be a wireless connection module. Such as bluetooth communication units, wi-Fi communication units, zigbee communication units, and the like.

In some embodiments, after the processor 61 receives the audio file sent by the external terminal through the communication unit 63, an audio signal may be generated in real time based on the received audio file, and after the audio signal is amplified by the power amplification module 70, the vibration motor 30 is driven in real time to make a sound.

In other embodiments, after the processor 61 receives the audio file sent by the external terminal through the communication unit 63, the audio file may be stored in the storage unit 62, and when the audio signal needs to be output subsequently, the processor 61 calls the audio file in the storage unit 62.

In some embodiments, referring to fig. 8, the audio electric toothbrush 100 further includes an audio decoding unit 64, the audio decoding unit 64 is electrically connected to the processor 61 or integrated with the processor 61, and the audio decoding unit 64 is used for decoding an audio file to generate an audio signal.

The audio decoding unit 64 has different forms for different audio file formats. For an audio file in MP3 format, the audio decoding unit 64 may be a module having a corresponding MP3 codec algorithm; for audio files in WAV format, the audio decoding unit 64 may be a DAC (digital to analog converter) module or a PWM (pulse width modulation) module, either self-contained to the processor 61 or independent of the processor 61.

In other embodiments, the audio file may be decoded by the external terminal to generate an audio signal, and the audio file is sent to the audio electric toothbrush 100 to drive the vibration motor 30 to vibrate regularly and finally achieve. The audio decoding unit 64 may be eliminated at this time.

In some embodiments, the cleaning signal is in a first frequency range, for example, the first frequency range is 200Hz-1000Hz, so that the cleaning signal corresponds to a higher frequency, and the vibration motor 30 and the brush head 50 can be driven to vibrate at a high frequency, so as to achieve a better tooth cleaning effect. The audio signal is in a second frequency range, which is, for example, 20Hz-20000Hz, i.e. the frequency range of sound audible to the human ear. In contrast, the first frequency range falls within the second frequency range, i.e., the first frequency range partially overlaps the second frequency range. Thus, the first frequency range is selected in the second frequency range, that is, the frequency range of the cleaning signal is selected in the frequency range of the sound, so that when the vibration motor 30 is driven by the cleaning signal and the audio signal at the same time, the vibration motor 30 can have higher vibration frequency on the premise that the user can hear the sound, and further, a better tooth cleaning effect is achieved.

The second frequency range is completely overlapped with the first frequency range, and the first frequency range is 200Hz-1000Hz to ensure a better tooth cleaning effect, that is, the frequency range of the audio signal is 200Hz-1000Hz, so that after the cleaning signal and the audio signal are modulated into the space vector pulse width modulation signal, the frequency range of the space vector pulse width modulation signal is also approximately 200Hz-1000Hz, when the vibration motor 30 is driven to move by the space vector pulse width modulation signal, the cleaning movement and the sound production can be simultaneously realized, and the vibration motor 30 vibrates in the frequency range of 200Hz-1000Hz, so that the better tooth cleaning effect is achieved.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present application and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims

1. An audio powered toothbrush, comprising: the power amplifier comprises a processor module, a power amplifier module and a vibration motor which are electrically connected in sequence, wherein a first transmission channel and a second transmission channel are arranged between the processor module and the power amplifier module;

2. The audio powered toothbrush as defined in claim 1, wherein the processor module controls the cleaning signal and the audio signal to be output synchronously or asynchronously in time sequence.

3. The audio power toothbrush according to claim 1, wherein the processor module controls the cleaning signal and the audio signal to be output simultaneously in time sequence, and the power amplifier module outputs the amplified cleaning signal and the audio signal to the vibration motor after being superimposed.

4. The audio power toothbrush according to claim 1, wherein the processor module controls the cleaning signal and the audio signal to be output to the power amplification module in synchronization in time sequence, the power amplification module outputs the cleaning signal and the audio signal to the vibration motor in synchronization respectively, and the vibration motor superimposes the cleaning signal and the audio signal.

5. The audio powered toothbrush of claim 1, wherein the cleaning signal is a square wave signal.

6. The audio powered toothbrush as defined in claim 1, wherein the audio signal is a two-channel signal, the processor module outputting the audio signal in a single channel; or the processor module superimposes the audio signals of the two channels and outputs the superimposed audio signals.

7. The audio powered toothbrush as defined in claim 1, wherein,

The processor module is provided with two input and output ports;

8. The audio powered toothbrush as defined in claim 7, wherein,

The processor module is also provided with two control ports;

9. The audio powered toothbrush as defined in claim 8, wherein the processor module controls the cleaning signal and the audio signal to be output to the power amplifier module in time sequence synchronously, and the processor module controls only one of the two electronic switches to be turned on at the same time to output the cleaning signal to the power amplifier module asynchronously with the audio signal.

10. The audio powered toothbrush as defined in claim 7, wherein the first transmission line and the second transmission line are each provided with an impedance matching resistor.

11. The audio powered toothbrush as defined in claim 1, wherein the power amplifier module comprises:

12. The audio powered toothbrush as defined in claim 1, wherein the processor module comprises:

the processor is electrically connected with the power amplifier module;

13. The audio powered toothbrush as defined in claim 12, further comprising:

14. The audio powered toothbrush as defined in claim 12, further comprising:

15. The audio powered toothbrush as defined in any one of claims 1-14, wherein the cleaning signal is in a first frequency range and the audio signal is in a second frequency range that at least partially overlaps the first frequency range.

16. The audio powered toothbrush as defined in any one of claims 1-14, wherein the vibration motor is controlled to vibrate regularly by the amplified audio signal and wherein sound transmitted through the medium is transmitted by air to a sound of less than or equal to 20 db.