Automatic toothpaste output sonic toothbrush control circuit and device

Abstract

The utility model relates to a sonic toothbrush control circuit and device capable of automatically discharging toothpaste. The sonic toothbrush control circuit capable of automatically discharging toothpaste comprises a main control circuit, a sonic toothbrush motor control circuit, a toothpaste pump motor control circuit and a power management circuit, the sonic toothbrush motor control circuit comprises a first driving module; the toothpaste pump motor control circuit comprises a second driving module; the power supply management circuit comprises a lithium battery management module; the lithium battery management module is connected with the main control circuit; the lithium battery management module detects the voltage of a lithium battery and transmits the voltage to the main control circuit; the main control circuit controls the PWM output of the first driving module according to the voltage of the lithium battery so as to regulate and control the working frequency of the sonic toothbrush motor and controls the PWM output of the second driving module so as to regulate and control the working frequency of the toothpaste pump motor; the PWM output of the first driving module and the second driving module is conveniently and stably coordinated, so that when the toothpaste pump motor is driven, the vibration interference of the sonic toothbrush motor is effectively avoided, and the discharged toothpaste is stable and not easy to splash.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, and more specifically to a sonic toothbrush control circuit and device for automatically dispensing toothpaste. Background Art

[0002] An electric toothbrush is an electronic cleaning appliance that uses a motor to drive the toothbrush head to vibrate at high frequency, and is used to deeply clean the human oral cavity. Most ordinary electric toothbrushes only have the function of vibrating the toothbrush head. Before using, the user needs to manually squeeze toothpaste onto the bristles and then start the toothbrush head to vibrate to brush their teeth. In response to this, the prior art has designed and developed an electric toothbrush with an electric toothpaste squeezing function. However, in the circuit system of the existing electric toothbrush with a toothpaste squeezing function, two independent controllers are generally used to independently control the operation of the toothpaste pump motor and the toothbrush motor, so that the toothpaste pump motor can also run while the toothbrush motor is running. The toothbrush head controlled by the toothbrush motor and in high-frequency vibration will affect the stability of the toothpaste pump squeezing the toothpaste, and the toothpaste is easy to splash when the toothpaste is discharged. In this regard, actual usage situations are taken into consideration, such as: during normal operation, although it is recommended that users start and finish squeezing toothpaste before brushing their teeth, once the user forgets to squeeze the toothpaste first and directly starts the brushing control, the toothbrush motor will drive the toothbrush head to vibrate. If the user directly starts the toothpaste squeezing operation at this time, the toothpaste will be squeezed out along with the vibration of the toothbrush head. Since the toothbrush head vibrates at a high frequency, it is very easy to cause the squeezed toothpaste to splash. Therefore, the user must first turn off the vibration of the toothbrush head and then start squeezing toothpaste. This operation is more cumbersome, resulting in a poor user experience. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a sonic toothbrush control circuit and device for automatically dispensing toothpaste in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] On the one hand, the utility model provides an automatic toothpaste-dispensing sonic toothbrush control circuit, comprising a main control circuit, a sonic toothbrush motor control circuit, a toothpaste pump motor control circuit and a power management circuit; the sonic toothbrush motor control circuit comprises a first drive module that drives the sonic toothbrush motor to work, the toothpaste pump motor control circuit comprises a second drive module that drives the toothpaste pump motor to work, the first drive module and the second drive module are respectively connected to the main control circuit; the power management circuit comprises a lithium battery management module, the lithium battery management module is connected to the main control circuit; the lithium battery management module detects the lithium battery voltage and transmits it to the main control circuit, the main control circuit controls the PWM output of the first drive module according to the lithium battery voltage to adjust the working frequency of the sonic toothbrush motor and controls the PWM output of the second drive module to adjust the working frequency of the toothpaste pump motor.

[0006] In some embodiments, the lithium battery management module includes a lithium battery protection chip, a first resistor, a second resistor and a first capacitor; the VDD end of the lithium battery protection chip is connected to one end of the first resistor and one end of the first capacitor respectively, and the other end of the first resistor is connected to the positive electrode of the lithium battery; the first GND end of the lithium battery protection chip is connected to the other end of the first capacitor, the negative electrode of the lithium battery and one end of the second resistor respectively; the other end of the first capacitor is also connected to one end of the second resistor and the negative electrode of the lithium battery respectively, and one end of the second resistor is also connected to the negative electrode of the lithium battery; the VM end of the lithium battery protection chip is connected to the other end of the second resistor and is grounded; the second GND end of the lithium battery protection chip is connected to the negative electrode of the lithium battery.

[0007] In some embodiments, the first driving module includes a driving chip, a third capacitor and a fourth capacitor; the OUTA terminal of the driving chip is respectively connected to one end of the third capacitor and the negative pole of the sonic toothbrush motor, and the OUTB terminal of the driving chip is respectively connected to the other end of the third capacitor and the positive pole of the sonic toothbrush motor; the INA terminal and the INB terminal of the driving chip are respectively connected to the main control circuit; the VDD terminal of the driving chip is respectively connected to one end of the fourth capacitor and the positive pole of the lithium battery, and the PGND terminal, the AGND terminal of the driving chip and the other end of the fourth capacitor are all grounded.

[0008] In some embodiments, the second driving module includes a first MOS tube, a second capacitor, a first diode and a third resistor; the gate of the first MOS tube is respectively connected to one end of the third resistor and the main control circuit; the drain of the first MOS tube is respectively connected to one end of the second capacitor, the positive electrode of the first diode and the negative electrode of the toothpaste pump motor, the other end of the second capacitor is also respectively connected to the negative electrode of the first diode, the positive electrode of the toothpaste pump motor and the positive electrode of the lithium battery, the negative electrode of the first diode is also respectively connected to the positive electrode of the toothpaste pump motor and the positive electrode of the lithium battery; the source of the first MOS tube and the other end of the third resistor are both grounded.

[0009] In some embodiments, the first MOS transistor is an N-type MOS transistor.

[0010] In some embodiments, the power management circuit also includes a charging management module, which includes a second MOS tube, a third MOS tube, a second diode, a third diode, a fifth capacitor, a sixth capacitor, a seventh capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor; the gate of the second MOS tube is respectively connected to one end of the fourth resistor and the drain of the third MOS tube; the drain of the second MOS tube is respectively connected to the cathode of the second diode, the other end of the fourth resistor and one end of the fifth capacitor, the other end of the fourth resistor is also respectively connected to the cathode of the second diode and one end of the fifth capacitor, and one end of the fifth capacitor is also connected to the cathode of the second diode; the source of the second MOS tube is connected to the positive electrode of the lithium battery; the gate of the third MOS tube is respectively connected to one end of the fifth resistor and one end of the sixth resistor, and the fifth The other end of the resistor is connected to the main control circuit; the anode of the second diode is respectively connected to the anode of the third diode, the load P end and one end of the sixth capacitor, the anode of the third diode is also respectively connected to the load P end and one end of the sixth capacitor, one end of the sixth capacitor is also connected to the load P end, and the other end of the sixth capacitor is respectively connected to the load N end and one end of the seventh resistor; the cathode of the third diode is connected to one end of the eighth resistor, the other end of the eighth resistor is respectively connected to one end of the ninth resistor, one end of the seventh capacitor and the main control circuit, one end of the ninth resistor is also respectively connected to one end of the seventh capacitor and the main control circuit, and one end of the seventh capacitor is also connected to the main control circuit; the source of the third MOS tube, the other end of the fifth capacitor, the other end of the sixth resistor, the other end of the seventh resistor, the other end of the ninth resistor and the other end of the seventh capacitor are all grounded.

[0011] In some embodiments, the second MOS transistor and the third MOS transistor are both N-type MOS transistors.

[0012] In some embodiments, an indicator light circuit is also included, which includes a first red and green marquee module, a second red and green marquee module, a third red and green marquee module and a fourth red and green marquee module; the first red and green marquee module, the second red and green marquee module, the third red and green marquee module and the fourth red and green marquee module are respectively connected to the main control circuit.

[0013] In some embodiments, a key circuit is also included, and the key circuit includes a switch and mode switching key module and a toothpaste dispensing key module; the switch and mode switching key module and the toothpaste dispensing key module are respectively connected to the main control circuit.

[0014] On the other hand, the utility model also provides a device, comprising any one of the automatic toothpaste dispensing sonic toothbrush control circuits described above.

[0015] The beneficial effect of the utility model is that, different from the prior art, the automatic toothpaste dispensing sonic toothbrush control circuit of the utility model can comprehensively control the PWM output of the first drive module to adjust the working frequency of the sonic toothbrush motor and control the PWM output of the second drive module to adjust the working frequency of the toothpaste pump motor through the main control circuit; during the operation of the electric toothbrush, by coordinating and controlling the PWM outputs of the first drive module and the second drive module, and more fully considering the actual changes in the lithium battery voltage, when driving the second drive module to control the toothpaste pump motor to work, the PWM output of the first drive module is stably reduced or stopped and the second drive module can stably output PWM, so as to effectively avoid the vibration interference of the toothbrush vibration on the toothpaste dispensing, so that the toothpaste dispensing is stable and not easy to splash. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the system framework of the automatic toothpaste dispensing sonic toothbrush control circuit in the embodiment of the utility model;

[0017] Figure 2 It is a circuit structure diagram of the main control circuit in the embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the circuit structure of the lithium battery management module in the embodiment of the utility model;

[0019] Figure 4 Schematic diagram of the circuit structure of the first driving module in the embodiment of the utility model;

[0020] Figure 5 Schematic diagram of the circuit structure of the second driving module in the embodiment of the utility model;

[0021] Figure 6 Schematic diagram of the circuit structure of the charging management module in the embodiment of the utility model;

[0022] Figure 7 It is a schematic diagram of the circuit structure of the indicator light circuit in the embodiment of the utility model;

[0023] Figure 8 Schematic diagram of the circuit structure of the key circuit in the embodiment of the utility model;

[0024] Names and serial numbers marked in the figure: main control circuit-1; sonic toothbrush motor control circuit-2; toothpaste pump motor control circuit-3; power management circuit-4; first drive module-21; second drive module-31; lithium battery management module-41; charging management module-42; indicator light circuit-5; first red and green marquee module-51; second red and green marquee module-52; third red and green marquee module-53; fourth red and green marquee module-54; button circuit-6; switch and mode switching button module-61; toothpaste dispensing button module-62. DETAILED DESCRIPTION

[0025] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the utility model and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0028] Moreover, the terms "up, down, front, back, left, right, upper end, lower end" etc. indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0030] The utility model is implemented as follows Figure 1 As shown in the figure, a sonic toothbrush control circuit for automatically dispensing toothpaste includes a main control circuit 1, a sonic toothbrush motor control circuit 2, a toothpaste pump motor control circuit 3 and a power management circuit 4; the sonic toothbrush motor control circuit 2 includes a first drive module 21 that drives the sonic toothbrush motor to work, and the toothpaste pump motor control circuit 3 includes a second drive module 31 that drives the toothpaste pump motor to work, and the first drive module 21 and the second drive module 31 are respectively connected to the main control circuit 1; the power management circuit 4 includes a lithium battery management module 41, and the lithium battery management module 41 is connected to the main control circuit 1; the lithium battery management module 41 detects the lithium battery voltage and transmits it to the main control circuit 1, and the main control circuit 1 controls the PWM output of the first drive module 21 according to the lithium battery voltage to adjust the working frequency of the sonic toothbrush motor and controls the PWM output of the second drive module 31 to adjust the working frequency of the toothpaste pump motor.

[0031] In this embodiment, the main control circuit 1 includes a main control chip U2 and a peripheral circuit connected to the main control chip U2. For a circuit diagram of the main control circuit 1, please refer to Figure 2 Among them, the main control chip U2 is MCU, and the model of MCU is TX8C1260. TX8C1260 has the characteristics of high performance and low power consumption, with a maximum working frequency of 48MHz and a built-in 16K bytes of LogicFlash memory. The I / O control system based on TX8C1260 can change the value of the output port through corresponding instructions according to the changes of its input port, so as to realize the control of the circuit connected with it.

[0032] For details, please refer to the circuit diagram of the lithium battery management module 41 Figure 3 , wherein the lithium battery management module 41 includes a lithium battery protection chip U3, a first resistor R9, a second resistor R3 and a first capacitor C4; the VDD end of the lithium battery protection chip U3 is connected to one end of the first resistor R9 and one end of the first capacitor C4 respectively, and the other end of the first resistor R9 is connected to the positive electrode of the lithium battery; the first GND end of the lithium battery protection chip U3 is connected to the other end of the first capacitor C4, the negative electrode of the lithium battery and one end of the second resistor R3 respectively; the other end of the first capacitor C4 is also connected to one end of the second resistor R3 and the negative electrode of the lithium battery respectively, and one end of the second resistor R3 is also connected to the negative electrode of the lithium battery; the VM end of the lithium battery protection chip U3 is connected to the other end of the second resistor R3 and is grounded; the second GND end of the lithium battery protection chip U3 is connected to the negative electrode of the lithium battery.

[0033] During the operation of the electric toothbrush, the MCU cooperates to control the PWM power output by the first drive module 21 to the sonic toothbrush motor to adjust the working frequency of the sonic toothbrush motor, and controls the PWM power output by the second drive module 31 to the toothpaste pump motor to adjust the working frequency of the toothpaste pump motor, and takes into account the actual change of the lithium battery voltage, so that when the second drive module 31 is driven to control the toothpaste pump motor to start working, the PWM output of the first drive module 21 is first stably reduced or stopped, and then the second drive module 31 can stably output PWM to stably switch the working state of the sonic toothbrush motor and stably drive the toothpaste pump motor to run, so as to achieve the purpose of stable toothpaste squeezing. Since the lithium battery voltage will change with the use time, and the voltage change will affect the motor power, the MCU is cooperated to output different PWM to the motor according to different voltages to stabilize the motor power.

[0034] For example, when the first drive module 21 is running, when the MCU detects the start signal of the second drive module 31, it controls the first drive module 21 to stop PWM output or reduce PWM output through the corresponding circuit and signal in combination with the current lithium battery voltage, and then controls the second drive module 31 to perform PWM output to enable the toothpaste pump motor to start and run stably, and not easily cause vibration interference to the operation of the toothpaste pump motor, so as to achieve the purpose of stable toothpaste dispensing and not easy to splash; when the toothpaste dispensing is finished, the MCU controls the second drive module 31 to stop output, the toothpaste pump motor stops running, and then controls the first drive module 21 to resume output, so as to restore the working state of the sonic toothbrush motor, so that the user can directly switch the toothpaste dispensing operation, thereby improving the user's usage experience.

[0035] The lithium battery protection chip U3, in combination with the corresponding peripheral circuit, can also protect the lithium battery from short circuit, overcurrent and over discharge. In this embodiment, the model of the lithium battery protection chip U3 is XB4302A.

[0036] For details, please refer to the circuit diagram of the first driving module 21. Figure 4 , wherein the first driving module 21 includes a driving chip U7, a third capacitor C2 and a fourth capacitor C1; the OUTA terminal of the driving chip U7 is connected to one end of the third capacitor C2 and the negative pole of the sonic toothbrush motor, and the OUTB terminal of the driving chip U7 is connected to the other end of the third capacitor C2 and the positive pole of the sonic toothbrush motor; the INA terminal and the INB terminal of the driving chip U7 are connected to the main control circuit 1; the VDD terminal of the driving chip U7 is connected to one end of the fourth capacitor C1 and the positive pole of the lithium battery, and the PGND terminal, the AGND terminal of the driving chip U7 and the other end of the fourth capacitor C1 are grounded. Cooperating with the MCU, the I / O ports P21 and P22 are used to control the sonic toothbrush motor to work at different frequencies / duty cycles to produce different vibration effects.

[0037] For details, please refer to the circuit diagram of the second driving module 31. Figure 5 , wherein the second driving module 31 includes a first MOS tube Q2, a second capacitor C5, a first diode D2 and a third resistor R7; the gate of the first MOS tube Q2 is connected to one end of the third resistor R7 and the main control circuit 1 respectively; the drain of the first MOS tube Q2 is connected to one end of the second capacitor C5, the positive electrode of the first diode D2 and the negative electrode of the toothpaste pump motor respectively, the other end of the second capacitor C5 is also connected to the negative electrode of the first diode D2, the positive electrode of the toothpaste pump motor and the positive electrode of the lithium battery respectively, the negative electrode of the first diode D2 is also connected to the positive electrode of the toothpaste pump motor and the positive electrode of the lithium battery respectively; the source of the first MOS tube Q2 and the other end of the third resistor R7 are both grounded. Based on the driving circuit composed of the first MOS tube Q2 and its peripheral components, the MCU controls the second driving module 31 to send a PWM waveform to drive the toothpaste pump motor to work.

[0038] In this embodiment, the first MOS transistor Q2 is an N-type MOS transistor.

[0039] Specifically, the power management circuit 4 also includes a charging management module 42. For a circuit diagram of the charging management module 42, please refer to Figure 6, wherein the charging management module 42 includes a second MOS transistor Q1, a third MOS transistor Q3, a second diode D3, a third diode D1, a fifth capacitor C21, a sixth capacitor C10, a seventh capacitor C3, a fourth resistor R4, a fifth resistor R10, a sixth resistor R15, a seventh resistor R5, an eighth resistor R2 and a ninth resistor R6; the gate of the second MOS transistor Q1 is connected to one end of the fourth resistor R4 and the drain of the third MOS transistor Q3 respectively; the drain of the second MOS transistor Q1 is connected to the cathode of the second diode D3, the other end of the fourth resistor R4 and one end of the fifth capacitor C21 respectively, the other end of the fourth resistor R4 is also connected to the cathode of the second diode D3 and one end of the fifth capacitor C21 respectively, and one end of the fifth capacitor C21 is also connected to the cathode of the second diode D3; the source of the second MOS transistor Q1 is connected to the positive electrode of the lithium battery; the gate of the third MOS transistor Q3 is connected to one end of the fifth resistor R10 and one end of the sixth resistor R15 respectively; The other end of the sixth capacitor C10 is connected to the main control circuit 1; the anode of the second diode is respectively connected to the anode of the third diode D1, the load P end and one end of the sixth capacitor C10, the anode of the third diode D1 is also respectively connected to the load P end and one end of the sixth capacitor C10, one end of the sixth capacitor C10 is also connected to the load P end, and the other end of the sixth capacitor C10 is respectively connected to the load N end and one end of the seventh resistor R5; the cathode of the third diode D1 is connected to one end of the eighth resistor R2, the other end of the eighth resistor R2 is respectively connected to one end of the ninth resistor R6, one end of the seventh capacitor C3 and the main control circuit 1, one end of the ninth resistor R6 is also respectively connected to one end of the seventh capacitor C3 and the main control circuit 1, and one end of the seventh capacitor C3 is also connected to the main control circuit 1; the source of the third MOS tube Q3, the other end of the fifth capacitor C21, the other end of the sixth resistor R15, the other end of the seventh resistor R5, the other end of the ninth resistor R6 and the other end of the seventh capacitor C3 are all grounded. Based on the charging management circuit composed of the second MOS tube Q1Q1 and the third MOS tube Q3Q3 and their peripheral components, the charging is detected and controlled. The MCU detects the voltage of the lithium battery during charging and cuts off the charging when it is full to prevent overcharging.

[0040] In this embodiment, the second MOS transistor Q1 and the third MOS transistor Q3 are both N-type MOS transistors.

[0041] Furthermore, the automatic toothpaste-dispensing sonic toothbrush control circuit of the utility model embodiment also includes an indicator light circuit 5, which includes a first red and green marquee module 51, a second red and green marquee module 52, a third red and green marquee module 53 and a fourth red and green marquee module 54; the first red and green marquee module 51, the second red and green marquee module 52, the third red and green marquee module 53 and the fourth red and green marquee module 54 are respectively connected to the main control circuit 1.

[0042] In this embodiment, the indicator light circuit 5 includes 14 red and green bicolor LED lights, and the 14 red and green bicolor LED lights are used to indicate different states. For example, the first red and green marquee module 51 includes 5 LED rotating marquees, the second red and green marquee module 52 includes 2 LED rotating marquees, the third red and green marquee module 53 includes 3 LED rotating marquees, and the fourth red and green marquee module 54 includes 4 LED rotating marquees. Please refer to Figure 7 In actual application, the number of LED rotating marquees in the above red and green marquee modules can be selected according to actual application requirements.

[0043] Furthermore, the automatic toothpaste dispensing sonic toothbrush control circuit of the utility model embodiment further includes a key circuit 6, which includes a switch and mode switching key module 61 and a toothpaste dispensing key module 62; the switch and mode switching key module 61 and the toothpaste dispensing key module 62 are respectively connected to the main control circuit 1. Please refer to the circuit diagram of the key circuit 6 Figure 8 .

[0044] The switch and mode switching button module 61 includes a switch and mode switching button. When the switch and mode switching button 61 is pressed, the I / O port inputs a low level to wake up the MCU. Then, different modes are switched by changing the long press time to realize the functions of different modes. The toothpaste dispensing button module 62 includes a toothpaste dispensing button. When the toothpaste dispensing button is pressed, the toothpaste dispensing working state is turned on.

[0045] It should be noted that the manner of establishing connection between corresponding circuits and / or modules in this embodiment, such as electrical connection, is a prior art and is not specifically limited here.

[0046] In another embodiment of the present invention, a device is provided, including the automatic toothpaste dispensing sonic toothbrush control circuit provided in the above embodiment. For the introduction of the automatic toothpaste dispensing sonic toothbrush control circuit, please refer to the above embodiment, which will not be repeated here.

[0047] It should be understood that ordinary technical workers in the field can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A sonic toothbrush control circuit for automatically dispensing toothpaste, characterized in that: It includes a main control circuit, a sonic toothbrush motor control circuit, a toothpaste pump motor control circuit and a power management circuit; the sonic toothbrush motor control circuit includes a first drive module that drives the sonic toothbrush motor to work, the toothpaste pump motor control circuit includes a second drive module that drives the toothpaste pump motor to work, and the first drive module and the second drive module are respectively connected to the main control circuit; the power management circuit includes a lithium battery management module, and the lithium battery management module is connected to the main control circuit; the lithium battery management module detects the lithium battery voltage and transmits it to the main control circuit, and the main control circuit controls the PWM output of the first drive module according to the lithium battery voltage to adjust the working frequency of the sonic toothbrush motor and controls the PWM output of the second drive module to adjust the working frequency of the toothpaste pump motor.

2. The automatic toothpaste dispensing sonic toothbrush control circuit according to claim 1, characterized in that: The lithium battery management module includes a lithium battery protection chip, a first resistor, a second resistor and a first capacitor; the VDD end of the lithium battery protection chip is connected to one end of the first resistor and one end of the first capacitor respectively, and the other end of the first resistor is connected to the positive electrode of the lithium battery; the first GND end of the lithium battery protection chip is connected to the other end of the first capacitor, the negative electrode of the lithium battery and one end of the second resistor respectively; the other end of the first capacitor is also connected to one end of the second resistor and the negative electrode of the lithium battery respectively, and one end of the second resistor is also connected to the negative electrode of the lithium battery; the VM end of the lithium battery protection chip is connected to the other end of the second resistor and is grounded; the second GND end of the lithium battery protection chip is connected to the negative electrode of the lithium battery.

3. The automatic toothpaste dispensing sonic toothbrush control circuit according to claim 1, characterized in that: The first driving module includes a driving chip, a third capacitor and a fourth capacitor; the OUTA terminal of the driving chip is respectively connected to one end of the third capacitor and the negative pole of the sonic toothbrush motor, and the OUTB terminal of the driving chip is respectively connected to the other end of the third capacitor and the positive pole of the sonic toothbrush motor; the INA terminal and INB terminal of the driving chip are respectively connected to the main control circuit; the VDD terminal of the driving chip is respectively connected to one end of the fourth capacitor and the positive pole of the lithium battery, and the PGND terminal, AGND terminal of the driving chip and the other end of the fourth capacitor are all grounded.

4. The automatic toothpaste dispensing sonic toothbrush control circuit according to claim 1, characterized in that: The second driving module includes a first MOS tube, a second capacitor, a first diode and a third resistor; the gate of the first MOS tube is respectively connected to one end of the third resistor and the main control circuit; the drain of the first MOS tube is respectively connected to one end of the second capacitor, the positive electrode of the first diode and the negative electrode of the toothpaste pump motor, the other end of the second capacitor is also respectively connected to the negative electrode of the first diode, the positive electrode of the toothpaste pump motor and the positive electrode of the lithium battery, the negative electrode of the first diode is also respectively connected to the positive electrode of the toothpaste pump motor and the positive electrode of the lithium battery; the source of the first MOS tube and the other end of the third resistor are both grounded.

5. The automatic toothpaste dispensing sonic toothbrush control circuit according to claim 4, characterized in that: The first MOS tube is an N-type MOS tube.

6. The automatic toothpaste dispensing sonic toothbrush control circuit according to claim 1, characterized in that: The power management circuit also includes a charging management module, which includes a second MOS tube, a third MOS tube, a second diode, a third diode, a fifth capacitor, a sixth capacitor, a seventh capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor; the gate of the second MOS tube is respectively connected to one end of the fourth resistor and the drain of the third MOS tube; the drain of the second MOS tube is respectively connected to the cathode of the second diode, the other end of the fourth resistor and one end of the fifth capacitor, the other end of the fourth resistor is also respectively connected to the cathode of the second diode and one end of the fifth capacitor, and one end of the fifth capacitor is also connected to the cathode of the second diode; the source of the second MOS tube is connected to the positive electrode of the lithium battery; the gate of the third MOS tube is respectively connected to one end of the fifth resistor and one end of the sixth resistor, the other end of the fifth resistor is also connected to the cathode of the second diode; one end is connected to the main control circuit; the anode of the second diode is respectively connected to the anode of the third diode, the load P end and one end of the sixth capacitor, the anode of the third diode is also respectively connected to the load P end and one end of the sixth capacitor, one end of the sixth capacitor is also connected to the load P end, and the other end of the sixth capacitor is respectively connected to the load N end and one end of the seventh resistor; the cathode of the third diode is connected to one end of the eighth resistor, the other end of the eighth resistor is respectively connected to one end of the ninth resistor, one end of the seventh capacitor and the main control circuit, one end of the ninth resistor is also respectively connected to one end of the seventh capacitor and the main control circuit, and one end of the seventh capacitor is also connected to the main control circuit; the source of the third MOS tube, the other end of the fifth capacitor, the other end of the sixth resistor, the other end of the seventh resistor, the other end of the ninth resistor and the other end of the seventh capacitor are all grounded.

7. The automatic toothpaste dispensing sonic toothbrush control circuit according to claim 6, characterized in that: The second MOS tube and the third MOS tube are both N-type MOS tubes.

8. The automatic toothpaste dispensing sonic toothbrush control circuit according to any one of claims 1 to 7, characterized in that: It also includes an indicator light circuit, which includes a first red and green marquee module, a second red and green marquee module, a third red and green marquee module and a fourth red and green marquee module; the first red and green marquee module, the second red and green marquee module, the third red and green marquee module and the fourth red and green marquee module are respectively connected to the main control circuit.

9. The automatic toothpaste dispensing sonic toothbrush control circuit according to any one of claims 1 to 7, characterized in that: It also includes a key circuit, which includes a switch and mode switching key module and a toothpaste dispensing key module; the switch and mode switching key module and the toothpaste dispensing key module are respectively connected to the main control circuit.

10. A device, characterized in that: It comprises the automatic toothpaste dispensing sonic toothbrush control circuit as described in any one of claims 1-9.

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