CN-122005134-A - Electric toothbrush entry detection circuit

CN122005134ACN 122005134 ACN122005134 ACN 122005134ACN-122005134-A

Abstract

The invention discloses an electric toothbrush inlet detection circuit, which relates to the field of toothbrushes and comprises a toothbrush inlet detection module, a motor driving module and an MCU main control module, wherein the toothbrush inlet detection module is used for carrying out toothbrush inlet detection through a Doppler sensor and sending detection signals to the MCU main control module after processing, the motor driving module is used for receiving control signals of the MCU main control module and driving a motor to operate so as to realize the tooth brushing function of the electric toothbrush, and the MCU main control module is used for comprehensively controlling the circuit to work.

Inventors

GONG YU
LIN HONG
LI YANCHUN
XIAO LIHUA
LIU ZHIDONG
WANG SHIJIE

Assignees

深圳市高科润电子有限公司
高科润电子(浙江)有限公司

Dates

Publication Date: 20260512
Application Date: 20260303

Claims (8)

1. An electric toothbrush entrance detection circuit, characterized in that the electric toothbrush entrance detection circuit comprises: The toothbrush inlet detection module is used for detecting the toothbrush inlet through the Doppler sensor, processing detection signals and sending the detection signals to the MCU main control module; the motor driving module is used for receiving the control signal of the MCU main control module and driving the motor to run so as to realize the tooth brushing function of the electric toothbrush; the MCU main control module is used for comprehensively controlling the circuit to work; The output end of the toothbrush inlet detection module is connected with the first input end of the MCU main control module, and the first output end of the MCU main control module is connected with the input end of the motor driving module.
2. The electric toothbrush entrance detection circuit of claim 1, wherein the toothbrush entrance detection module comprises a doppler sensor J1 and an induction chip U4, the type of the induction chip U4 is that a first end of the doppler sensor J1 receives a common point VC through a resistor R25, a second end of the doppler sensor J1 is connected with one end of a capacitor C8, a third end of the doppler sensor J1 is grounded, the other end of the capacitor C8 is connected with one end of a resistor R26, the other end of the resistor R26 is connected with one end of a resistor R29, one end of the capacitor C9, pin No. 2 of the induction chip U4, the other end of the resistor R29 is connected with the other end of the capacitor C9, pin No. 1 of the induction chip U4, pins No. 3 to No. 6 of the induction chip U4 are respectively connected with an anode bat+ of a battery through a resistor, pin No. 5 of the induction chip U4 is grounded, and pin No. 6 of the induction chip U4 is connected with a first input end of the MCU main control module.
3. The electric toothbrush entrance detection circuit of claim 1, wherein the motor driving module comprises a motor driving chip U3, pins 1 and 3 of the motor driving chip U3 are respectively connected with common points P5 and P6 through a resistor, pin 2 of the motor driving chip U3 is grounded, pin 4 of the motor driving chip U3 is connected with a positive electrode BAT+ of a battery, and pins 5 and 6 of the motor driving chip U3 are respectively connected with a first output end of the MCU main control module through a resistor.
4. The electric toothbrush entrance detection circuit of claim 1, wherein the MCU master control module comprises: The switch unit is used for providing an opening signal and a closing signal for the main control chip through a switch action; the main control unit is used for starting work when receiving the starting signal and stopping work when receiving the closing signal, controlling the on-off information of the indicating lamp of the indicating unit based on the working state of the electric toothbrush when working, receiving the detection signal output by the toothbrush inlet detection module when working, and outputting a control signal to the motor driving module; The indicating unit is used for receiving the control of the main control unit and indicating the current working state of the electric toothbrush through the indicating lamp; The output end of the toothbrush inlet detection module is connected with the first input end of the main control unit, the first output end of the main control unit is connected with the input end of the motor driving module, the output end of the switch unit is connected with the second input end of the main control unit, and the second output end of the main control unit is connected with the input end of the indicating unit.
5. The electric toothbrush entrance detection circuit of claim 4, wherein the switch unit includes a key SW1, one end of the key SW1 is grounded, and the other end of the key SW1 is connected to the second input end of the main control unit.
6. The electric toothbrush entrance detection circuit of claim 4, wherein the main control unit comprises a main control chip U2, the model of the main control chip U2 is that pins 9 of the main control chip U2 are connected with the output end of the toothbrush entrance detection module, pins 5 and 6 of the main control chip U2 are connected with the input end of the motor driving module, the output end of the switch unit is connected with pin 4 of the main control chip U2, and pins 10-13 of the main control chip U2 are connected with the input end of the indicating unit.
7. The electric toothbrush entrance detection circuit of claim 6, wherein the indication unit comprises a MOS tube Q1, a MOS tube Q2, a MOS tube Q3, a MOS tube Q4, an indication lamp RGB1 and an indication lamp RGB2, the G electrode of the MOS tube Q1 is connected with a No. 13 pin of the main control chip U2 through a resistor R15, the G electrode of the MOS tube Q2 is connected with a No. 12 pin of the main control chip U2 through a resistor R18, the G electrode of the MOS tube Q3 is connected with a No. 11 pin of the main control chip U2 through a resistor R16, the G electrode of the MOS tube Q4 is connected with a No. 10 pin of the main control chip U2 through a resistor R24, the D electrode of the MOS tube Q1 is connected with a first end of the indication lamp RGB1 and a first end of the indication lamp RGB2 through a resistor respectively, the D electrode of the MOS tube Q2 is connected with a second end of the indication lamp RGB1 and a third end of the indication lamp RGB2 through a resistor R15 respectively, the D electrode of the MOS tube Q3 is connected with a fifth end of the MOS tube RGB2, the MOS electrode of the MOS tube Q2 is connected with a fifth end of the MOS tube Q2 is connected with a positive electrode of the MOS tube Q4, and the MOS tube Q electrode of the MOS tube Q2 is connected with a positive electrode of the battery Q2 is connected with a positive electrode Q electrode of a positive electrode of a battery.
8. The electric toothbrush entrance detection circuit according to any one of claims 1 to 7, further comprising a charging module, wherein the charging module is used for externally connecting a charging power supply, and supplying power to a battery of the electric toothbrush after processing voltage and current of the charging power supply; the output end of the charging module is connected with the third input end of the MCU main control module; The charging module comprises a charging chip U1, the type of the charging chip U1 is that a No. 4 pin of the charging chip U1 is connected with the cathode of a diode D1, one end of a capacitor C1 and one end of a resistor R3, the other end of the capacitor C1 is grounded, the other end of the resistor R3 is connected with one end of a resistor R6, the other end of the resistor R6 is grounded, the anode of the diode D1 is connected with one end of a capacitor C2 and a common point P1, the other end of the capacitor C2 is grounded, a No. 5 pin of the charging chip U1 is grounded through a resistor R2, a No. 2 pin of the charging chip U1 is grounded, and a No. 3 pin of the charging chip U1 is connected with the anode BAT+ of a battery.

Description

Electric toothbrush entry detection circuit Technical Field The invention relates to the field of toothbrushes, in particular to an electric toothbrush inlet detection circuit. Background With the popularity of electric toothbrushes, users are no longer satisfied with basic cleaning functions, but rather have placed higher demands on intelligence, interactive experience, and energy conservation performance. The traditional electric toothbrush needs to manually control the start and stop of the motor, and has the problems of inconvenient use, splash of toothpaste, waste of electric energy and the like. Therefore, the entrance detection technology becomes a key innovation direction for optimizing user experience, and aims to intelligently control the working state of the toothbrush by automatically sensing whether the brush head enters the mouth or not. The mainstream implementation mode in the market is biological characteristic induction, namely multi-sensor fusion judgment is carried out through characteristic differences of temperature, humidity, capacitance and the like inside and outside an oral cavity, and the method has the following problems that 1, hardware cost is high, 2, misjudgment is caused by influence of organism symptoms, 3, software nesting is complex, judgment logic of different temperature and humidity conditions is complex, 4, manufacturing process is complex, and production cost is high. In summary, the existing toothbrush has the problems of high cost, easy misjudgment, complex software and complex production process in a biological characteristic sensing mode, and needs to be improved. Disclosure of Invention The invention aims to provide an electric toothbrush inlet detection circuit which solves the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: an electric toothbrush entrance detection circuit comprising: The toothbrush inlet detection module is used for detecting the toothbrush inlet through the Doppler sensor, processing detection signals and sending the detection signals to the MCU main control module; the motor driving module is used for receiving the control signal of the MCU main control module and driving the motor to run so as to realize the tooth brushing function of the electric toothbrush; the MCU main control module is used for comprehensively controlling the circuit to work; The output end of the toothbrush inlet detection module is connected with the first input end of the MCU main control module, and the first output end of the MCU main control module is connected with the input end of the motor driving module. As a still further scheme of the invention, the toothbrush inlet detection module comprises a Doppler sensor J1 and an induction chip U4, wherein the type of the induction chip U4 is that a first end of the Doppler sensor J1 receives a common point VC through a resistor R25, a second end of the Doppler sensor J1 is connected with one end of a capacitor C8, a third end of the Doppler sensor J1 is grounded, the other end of the capacitor C8 is connected with one end of a resistor R26, the other end of the resistor R26 is connected with one end of a resistor R29, one end of a capacitor C9 and a pin No. 2 of the induction chip U4, the other end of the resistor R29 is connected with the other end of the capacitor C9 and a pin No. 1 of the induction chip U4, pins No. 3 to No. 6 of the induction chip U4 are respectively grounded through a resistor to the anode BAT+ of a battery, and a pin No. 5 of the induction chip U4 is connected with a pin No. 6 of the induction chip U4 to the first input end of the MCU master control module. As a still further scheme of the invention, the motor driving module comprises a motor driving chip U3, the type of the motor driving chip U3 is that pins 1 and 3 of the motor driving chip U3 are respectively connected with common points P5 and P6 (the positions P5 and P6 are connected with motors) through a resistor, a pin 2 of the motor driving chip U3 is grounded, a pin 4 of the motor driving chip U3 is connected with a positive electrode BAT+ of a battery, and pins 5 and 6 of the motor driving chip U3 are respectively connected with a first output end of the MCU main control module through a resistor. As a still further scheme of the invention, the MCU main control module comprises: The switch unit is used for providing an opening signal and a closing signal for the main control chip through a switch action; the main control unit is used for starting work when receiving the starting signal and stopping work when receiving the closing signal, controlling the on-off information of the indicating lamp of the indicating unit based on the working state of the electric toothbrush when working, receiving the detection signal output by the toothbrush inlet detection module when working, and outputting a control signal to the motor driving module; The