Sound wave sweeping vibration electric toothbrush control circuit with voice motor sounding function

Abstract

The utility model relates to a sound wave sweeping vibration electric toothbrush control circuit with a voice motor sounding function, which comprises a motor with a voice sounding function, a main control unit, and a voice playing unit and a motor sound amplification driving unit which are respectively and electrically connected with the main control unit, a data sending pin of the main control unit is connected with a data receiving pin of the voice playing unit; pulses output by an audio pulse width modulation pin of the voice playing unit serve as signal input of the motor sound amplification driving unit, and the output end of the motor sound amplification driving unit is connected to the input end of the motor; and the main control unit is connected to a motor through a motor driving pin to carry out sound wave sweep vibration output. Compared with the prior art, the toothbrush has the advantages that clear voice broadcast is realized, the circuit is simple, an additional loudspeaker is not needed, the toothbrush is small in size, low in cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, in particular to a sonic sweeping electric toothbrush control circuit with a voice motor for sound generation. Background Art

[0002] Existing electric toothbrushes are controlled by conventional chips or single-chip microcontrollers coupled with discrete components. These lack built-in charging management control circuits, voice playback circuits, and integrated motor sound amplification and driver circuits. Instead, they require complex discrete components such as an external motor driver chip, power amplifier chip, external charging management chip, voice playback chip, and control chip. Furthermore, external speakers are required for sound reproduction. These speakers are small and not waterproof, and the sound is low and unclear, especially during electric brushing.

[0003] In the context of brushing teeth, how to simply implement a sonic sweeping electric toothbrush with clear voice playback has become an urgent problem that needs to be solved. Utility Model Content

[0004] The purpose of the present utility model is to overcome the defects of the above-mentioned prior art and to provide a sonic sweeping electric toothbrush control circuit with a voice motor for sound generation.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] According to one aspect of the utility model, a control circuit for a sonic sweep vibration electric toothbrush with a voice motor is provided. The circuit includes a motor with voice sound, a main control unit, a voice playback unit and a sound amplification and motor drive unit electrically connected to the main control unit, and synchronously realizes motor sound prompts and sonic sweep vibration drive control;

[0007] The data sending pin of the main control unit is connected to the data receiving pin of the voice playing unit;

[0008] The pulse output by the audio pulse width modulation pin of the voice playback unit is used as the signal input of the motor sound amplification drive unit, and the output end of the motor sound amplification drive unit is connected to the input end of the motor to perform motor sound prompt;

[0009] The main control unit is connected to the motor via the motor drive pin to output the acoustic wave sweep vibration.

[0010] Preferably, the data sending pin of the main control unit sends different timings to the data receiving pin of the voice playing unit through the SDA node.

[0011] Preferably, the high-level receiving pin of the main control unit is electrically connected to the data sending pin of the voice playing unit through an SCL node.

[0012] Preferably, when the voice playback is completed, the data sending pin of the voice playback unit sends a high level to the high level receiving pin of the main control unit.

[0013] Preferably, the audio pulse width modulation pin of the voice playback unit includes a PWMN pin and a PWMP pin, wherein the PWMN pin is the negative electrode of the audio pulse width modulation and is connected to the signal input terminal A of the motor sound amplification drive unit through the PWMN node.

[0014] Preferably, the PWMP pin is the positive electrode of the audio pulse width modulation, and is connected to the signal input terminal B of the motor sound amplification drive unit through the PWMP node.

[0015] Preferably, the output end A and the output end B of the motor sound amplifying driving unit are respectively connected to the input end A and the input end B of the voice playing motor.

[0016] Preferably, the circuit further includes a battery protection unit, and the charging control pin and the charging current setting port of the main control unit are connected to the battery protection unit through an EN_VIN node.

[0017] Preferably, the circuit further comprises a display driving unit connected to the main control unit, and a display control pin of the main control unit is connected to an LED lamp of the display driving unit.

[0018] Preferably, the circuit further comprises a button connected to the main control unit for human-computer interaction.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the circuit of the utility model, the main control unit is a highly integrated control chip that integrates a charging management circuit, an audio storage and playback circuit, an audio amplification drive circuit and a control circuit. By simply designing the corresponding voice playback unit circuit, the motor sound driving unit circuit and the peripheral circuit, the electric toothbrush status voice broadcast and the sonic sweeping tooth vibration output are realized through a motor with voice sound. Compared with the existing sonic electric toothbrush solution circuit, it is suitable for scenarios where the sonic electric toothbrush playback sound is loud and clear, without the need for an external speaker, and is conducive to reducing costs and the development of miniaturization of sonic sweeping electric toothbrushes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the toothbrush circuit in the present utility model;

[0022] Figure 2 This is a circuit diagram of the main control unit in the present utility model;

[0023] Figure 3This is a circuit diagram of the voice playback unit in the present utility model;

[0024] Figure 4 This is a circuit diagram of the motor sound amplification drive unit in the present invention;

[0025] Figure 5 This is a schematic diagram of the connection between the motor sound amplification drive unit and the motor in the present invention;

[0026] Figure 6 It is a schematic structural diagram of the display drive unit in the present utility model;

[0027] Figure 7 This is a schematic diagram of the key switch in the utility model;

[0028] Figure 8 This is a schematic structural diagram of the battery protection unit in the present utility model;

[0029] Figure 9 This is a schematic diagram of the structure of the main control chip in this utility model;

[0030] In the accompanying drawings, 1 is a main control unit, 2 is a voice playback unit, 3 is a motor sound amplification drive unit, 4 is a display drive unit, and 5 is a battery protection unit. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0032] The utility model relates to a control circuit of an electric toothbrush with a sonic sweeping vibration function and a voice motor. Figure 1 The control circuit includes a main control unit 1, and a voice playback unit 2, a motor sound amplification drive unit 3, a display drive unit 4 and a battery protection unit 5 respectively connected to the main control unit 1, and a motor, wherein the motor supports voice sound playback.

[0033] The main control unit 1 is used to control the motor to perform ultrasonic sweeping and vibration brushing, including turning the toothbrush on and off and switching modes. The main control unit 1 includes a main control chip U3, and peripheral circuits connected to the voice playback unit 2, the motor sound amplification drive unit 3, the display drive unit 4 and the battery protection unit 5.

[0034] The voice playback unit 2 plays different voice prompts through the motor according to the state of the toothbrush, which is realized by the voice playback chip U2 and peripheral circuits.

[0035] The motor sound amplifying and driving unit 3 is used to amplify and drive the motor to play voice, and includes a motor sound amplifying and driving chip U1.

[0036] The display drive unit 4 is used to display the status of the toothbrush, including the toothbrush mode and battery status, through a combination of LED lights.

[0037] The battery protection unit 5 is used to protect the battery, and includes a battery protection chip U4.

[0038] The power supply provides power to the entire circuit including the main control unit 1, the voice playback unit 2, the motor sound amplification drive unit 3, the display drive unit 4 and the battery protection unit 5. Furthermore, the power supply is a 3.7V lithium battery.

[0039] The main control unit 1 utilizes a highly integrated control chip U3 (referred to as the main control chip) that integrates both charge management and control circuits, eliminating the need for an external charge management chip or motor driver chip. Using the main control chip U3 in a sonic sweeping electric toothbrush reduces complex peripheral circuitry, component costs, and simplifies PCB (printed circuit board) layout and manufacturing. Combined with an adaptive software algorithm, it enables large toothbrush swing. Furthermore, the main control chip U3 can optionally utilize the UPT9E93G chip.

[0040] like Figure 9 The UPT9E93G chip is a single-chip microcontroller (MCU) with a built-in 32V high-voltage lithium-ion linear charging management circuit and ADC. It utilizes a 4-bit reduced instruction set (RISC) MCU core, integrating a 32V high-voltage charging management circuit and a DC motor drive circuit. The chip also features multi-time programmable program memory (MTP ROM), static data memory (SRAM), an analog-to-digital converter (ADC), a low-voltage reset circuit (LVR), a watchdog circuit (WDT), timers 1 and 2, an internal oscillator circuit (IRC), a port control circuit (GPIO), a power charging management circuit, an audio storage and playback circuit, an audio amplifier driver circuit, and a control unit. After programming the MCU software and burning the final binary code into the program memory using a programmer, a sonic sweeping toothbrush circuit with voice prompts for various functions can be implemented. This application features high integration, minimal peripheral circuitry, low power consumption, flexible control, clear voice playback, and large sweeping amplitude. The main control chip UPT9E93G adopts a low-cost ESOP16-pin package. Different pin orders and packaging forms are all within the scope of protection of this application; fully integrated control chips (or packaged chips) with built-in lithium-ion linear charging management circuits, audio storage and playback circuits, audio amplification drive circuits and control units are all within the scope of protection of this application.

[0041] like Figure 2, the first pin of the main control chip U3 (SW1 node) is the button pin, connected Figure 7 The switch SW1 realizes the human-computer interaction function, including the three mode switching and power off function of the toothbrush.

[0042] The second, third and fifteenth pins of the main control chip U3 are display control pins, which are used to control LED lights and are connected to the three nodes LED1, LED2 and LED3 respectively. Figure 6 The LED control section displays the three toothbrush modes and the battery level indicator. When LED1 outputs 1, LED2 outputs 0, and LED3 is acting as an input, LED1-B (blue light) illuminates, indicating the voltage is greater than 3.4V in the operating state or fully charged in the charging state. When LED2 outputs 1, LED1 outputs 0, and LED3 is acting as an input, LED1-R (red light) illuminates, indicating the voltage is less than 3.4V in the operating state. The red light flashes at 1Hz to indicate a low battery. When the operating voltage falls below 3.0V, the red light flashes 2Hz five times as a warning, triggering a low-battery shutdown.

[0043] The toothbrush is designed with three operating modes, indicated by different LED lights. When LED1 outputs 1, LED3 outputs 0, and LED2 is input, LED6 lights up, indicating the third operating mode. When LED3 outputs 1, LED2 outputs 0, and LED1 is input, LED4 lights up, indicating the second operating mode. When LED2 outputs 1, LED3 outputs 0, and LED1 is input, LED5 lights up, indicating the first operating mode. The intensity gradually increases from the first to the third level to better adapt to the teeth's adaptability. Switching the intensity of the toothbrush's operating mode is achieved by long-pressing button SW1.

[0044] Pin 4 (PA0, a high-level receiving pin) of main control chip U3 is connected to pin 5 of voice playback chip U2 via the SCL node. When voice playback chip U2 finishes playing a voice message, it transmits a high level for 80ms to main control unit 1. After receiving the high level for 80ms on pin 4 of main control chip U3, the motor stops playing the voice message. Pin 5 (PB3, a data transmit pin) of main control chip U3 is connected to pin 6 (a data receive pin) of U2 via the SDA node. Different timings are used to play different voice messages, including power-up voice, mode switching voice, battery indicator voice, and charging voice. SCL is the clock signal used by main control unit 1 to send communication commands to voice playback unit 2, and SDA is the data signal used by main control unit 1 to send communication commands to voice playback unit 2.

[0045] Pin 7 (PE2, charging control pin) of the main control chip U3 controls the charging switch through the EN_VIN node. When fully charged and needing to shut off the current, it outputs a 1 to shut off the current. Pins 8 and 9 (PD2 and PD1) of the main control chip U3 are the forward and reverse drive pins for the motor, used to switch the motor's rotation direction to achieve the toothbrush's sweeping vibration function. Pin 10 (VUSB, charging pin) of the main control chip U3 is the USB or wireless charging input pin, and the voltage on this pin should be below 32V. Pin 11 (VBAT) of the main control chip U3 is the positive terminal interface of the linear charging circuit. Pin 12 (ISET) of the main control chip U3 is the charging current setting port. Connect an external resistor to pin 13 (GND) and the power ground. Pin 14 (VCC) of the main control chip U3 is the logic circuit power input port, connected to the power supply (BAT) and the programmer H4.

[0046] like Figure 3 The UPT7165 voice playback chip U2 is an OPT-type audio playback IC that integrates audio data storage and playback control. It uses a motor to play different sound prompts. The first pin (VCC) of the voice playback chip U2 is the power input and is connected to the positive power supply (BAT+). The second pin (PWMN) is the negative terminal of the audio pulse width modulation (PWM) and is connected to the signal input A (INA) of the motor sound amplifier driver chip U1. The eighth pin (PWMP) is the positive terminal of the audio pulse width modulation (PWM) and is connected to the signal input B (INB) of the motor sound amplifier driver chip U1. The fifth pin (SCL) is the data transmit pin. When the sixth pin (SDA, the data receive pin) receives data sent from the main control chip U3 via the SDA node and plays the data, it sends a high level for 80ms to indicate that the voice playback is complete. The sixth pin (SDA) is the data receive pin, which receives data sent from the main control chip U3 via the SDA node to play different voice prompts. The seventh pin (GND) of the voice playback chip U2 is the ground input terminal. Furthermore, the voice playback chip U2 is UPT7165A.

[0047] like Figure 4 , motor drive and digital PWM audio signal amplification dedicated motor sound amplification driver chip U1UPT8312A internally integrates H-bridge and digital audio amplifier circuit, the two music PWM signal input terminals with different input logic can realize audio amplification and motor forward and reverse functions. The two music PWM (PWMN and PWMP) signal input terminals with different logic inputs can realize music amplification and standby functions. The second pin (VSS) is the signal ground GND, the third pin (INB) and the fourth pin (INA) are signal input terminal B and signal input terminal A respectively, which are connected to the PWMP and PWMN signals of the main control chip respectively. The first pin (OUTB) and the sixth pin (OUTA) are output terminal B and output terminal A respectively, connected Figure 5The fifth pin (VDD) is the power pin and is connected to the positive terminal (BAT+) of the power supply. Furthermore, the motor sound amplification driver chip U1 is a UPT8312A.

[0048] Voice playback uses PWMN and PWMP on the voice playback chip U2 to generate pulses. At this time, PWMN and PWMP on the main control chip U3 output 0, indicating that the function is off. The acoustic sweep vibration function uses PWMN and PWMP on the main control chip U3 to generate pulses to drive the motor. At this time, PWMN and PWMP on the voice playback chip U2 output 0, indicating that the function is off. In short, only one of the voice playback and acoustic sweep vibration functions is active at the same time.

[0049] like Figure 8 Battery protection chip U4: Pin 1 (V-) is the current sensing input pin for charger detection. It is connected to pin 2 through resistor R13 and then to ground. Pin 2 (S1) is the S-pole of the charging MOSFET, the negative charging terminal. Pin 3 (S2) is the S-pole of the discharging MOSFET. After shorting with pin 6 (VSS), it is connected to the negative terminal of the battery cell, BAT-. Pin 4 (D) is the D-pole of the MOSFET, and pin 5 (VDD) is the positive power input pin.

[0050] Lithium battery BAT1 is connected to resistor R9 to power the chip's internal logic and peripheral devices. Pins 13 (GND) and 14 (VCC) of the main control chip U3 are connected to capacitors C5 and C6 in parallel, and then to the positive power supply (BAT+) through resistor R9. One end of button SW1 is connected to pin 1 (button) of the main control chip U3, and the other end is connected to the power ground. One end of LED1 is connected to pin 2 of the main control chip U3, and the other end is connected to resistor R4. One end of LED2 is connected to pin 3 of the main control chip U3, and the other end is connected to resistor R5. One end of LED3 is connected to pin 15 of the main control chip U3, and the other end is connected to resistor R6. One end of the SCL node is connected to pin 4 (high-level receiving pin) of the main control chip U3, and the other end is connected to pin 5 (data transmitting pin) of the voice playback chip U2. One end of the SDA node is connected to pin 5 (data transmitting pin) of the main control chip U3, and the other end is connected to pin 6 (data receiving pin) of the voice playback chip U2. One end of the EN_VIN node is connected to one end of resistor R10, and the other end to one end of resistor R11. The other end of resistor R10 is connected to pin 12 (ISET) of the main control chip U3, and the other end of resistor R11 is connected to the power ground. One end of the PD2 node is connected to pin 8 (PD2) of the main control chip U3, and the other end is connected to resistor R7. One end of resistor R7 is connected to pin 3 (INB) of the motor sound amplifier driver chip U1. The other end of resistor R7 is connected to resistor R2 of voice playback unit 2, and then to pin 8 (PWMP) of the voice playback chip U2. One end of the PD1 node is connected to pin 9 (PD1) of the main control chip U3, and the other end is connected to resistor R6, and then to pin 4 (INA) of U1. The other end of resistor R6 is connected to resistor R3, and then to pin 2 (PWMN) of the voice playback chip.

[0051] The circuit adopts low-cost ESOP16 package, which is convenient for patch production and product heat dissipation.

[0052] This circuit's principles: The SW1 button enables human-computer interaction, enabling startup voice playback and multi-mode switching of the toothbrush, a sweep vibration function, and the ability to switch between three sweep vibration intensities. Upon power-on, the device defaults to the off state. Pins 9 and 8 (PD1 and PD2) of the main control chip U3 output a low level, disabling the toothbrush's power-on motor. A short press of the SW1 button turns the device on. Pin 5 (PB3) of the main control chip U3 transmits startup carrier data via the SDA node. Pin 6 of the voice playback chip U2 receives data from the main control unit 1 and plays the startup voice function (the same applies to gear shifting). This allows for voice playback for power on and off, 30-second voice reminders, gear shifting voice reminders, low-battery voice reminders, low-battery shutdown reminders, and charging reminders. After the power-on voice is played, the SCL pin of the voice playback chip U2 transmits an 80ms high signal to the SCL pin of the main control chip U3. After receiving the 80ms data, the main control chip U3 turns on the toothbrush's sweep vibration output function. After entering the working mode, it has a two-minute automatic timing function, prompting the user to change the brushing direction every 30 seconds. In 30 seconds, the main control chip U3 transmits different carrier data through the SDA node. After receiving the data through the SDA node, the sixth pin of the voice playback chip U2 plays different 30s pause voices. After 2 minutes, it automatically shuts down and plays the shutdown voice. After shutting down, the last shutdown mode is saved when it is turned on next time. The eighth and ninth pins of the main control chip U3 are the motor drive pins. By outputting different pulses, the toothbrush sweep vibration output function with three gears is realized.

[0053] The UPT9E93G chip features high circuit integration, including a built-in 32V high-voltage lithium-ion battery linear charge management and control circuit, and is controlled by an MTP (Multi-Time Programmable) microcontroller core. Flexible software adjustments allow for rapid adaptation to different product functions, facilitating the miniaturization of toothbrushes with lithium-ion battery-powered voice playback and sonic sweeping functions. The UPT9E93G chip also boasts low power consumption, extending product life.

[0054] This circuit uses a voice playback unit and a motor sound amplifier drive unit to drive the sonic motor to achieve voice playback and sonic sweep vibration brushing. Compared with ordinary solutions, the voice playback sound is loud, the sound quality is clear, the circuit is simple, the integration is high and the cost is low.

[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A sonic sweeping electric toothbrush control circuit with a voice motor, the circuit comprising a motor with voice sound, characterized in that: The circuit includes a main control unit, a voice playing unit and a motor sound amplifying driving unit electrically connected to the main control unit respectively; The data sending pin of the main control unit is connected to the data receiving pin of the voice playing unit; The pulse output by the audio pulse width modulation pin of the voice playback unit is used as the signal input of the motor sound amplification drive unit, and the output end of the motor sound amplification drive unit is connected to the input end of the motor to perform motor sound prompt; The main control unit is connected to the motor via the motor drive pin to output the acoustic wave sweep vibration.

2. The sonic sweep vibration electric toothbrush control circuit according to claim 1, characterized in that: The data sending pin of the main control unit sends different timings to the data receiving pin of the voice playing unit through the SDA node.

3. The sonic sweep vibration electric toothbrush control circuit according to claim 1, characterized in that: The high-level receiving pin of the main control unit is electrically connected to the data sending pin of the voice playing unit through the SCL node.

4. The sonic sweep vibration electric toothbrush control circuit according to claim 1, characterized in that: The data sending pin of the voice playing unit is connected to the high level receiving pin of the main control unit.

5. The sonic sweep vibration electric toothbrush control circuit according to claim 1, characterized in that: The audio pulse width modulation pins of the voice playback unit include a PWMN pin and a PWMP pin, wherein the PWMN pin is the audio pulse width modulation negative electrode and is connected to the signal input terminal A of the motor sound amplification drive unit through the PWMN node.

6. The sonic sweep vibration electric toothbrush control circuit according to claim 5, characterized in that: The PWMP pin is the positive electrode of the audio pulse width modulation, and is connected to the signal input terminal B of the motor sound amplification drive unit through the PWMP node.

7. The sonic sweep vibration electric toothbrush control circuit according to claim 1, characterized in that: The output terminal A and the output terminal B of the motor sound amplifying driving unit are respectively connected to the input terminal A and the input terminal B of the voice playing motor.

8. The sonic sweeping electric toothbrush control circuit according to claim 1, characterized in that: The circuit further includes a battery protection unit, and the charging control pin and the charging current setting port of the main control unit are connected to the battery protection unit through an EN_VIN node.

9. The sonic sweep vibration electric toothbrush control circuit according to claim 1, characterized in that: The circuit further comprises a display driving unit connected to the main control unit, and a display control pin of the main control unit is connected to an LED lamp of the display driving unit.

10. The sonic sweep vibration electric toothbrush control circuit according to claim 1, characterized in that: The circuit also includes a key connected to the main control unit for human-computer interaction.

Images