Intelligent toothbrush circuit with charging protection function

Abstract

The utility model relates to an intelligent toothbrush circuit with a charging protection function. The intelligent toothbrush circuit comprises a main control chip and a battery protection circuit, when the intelligent toothbrush is used, the main control chip charges the battery through the battery protection circuit, the battery protection circuit carries out overcharge and overdischarge protection on the battery, the inching switch is used for setting the working mode of the intelligent toothbrush, the mode display circuit is used for displaying the working mode of the intelligent toothbrush, and the electric quantity display circuit is used for displaying the electric quantity of the battery. The main control chip also detects the voltage of the battery, and when the voltage of the battery is lower than the rated voltage, the main control chip stops driving the toothbrush driving motor to work, so that the electric quantity of the battery is prevented from being dried; therefore, overcharge protection and discharge protection are carried out on the battery, and the circuit is simple, low in cost and small in size.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent toothbrush circuits, and more specifically to an intelligent toothbrush circuit with a charging protection function. Background Art

[0002] Most of the existing smart toothbrush driving circuits have complex circuits, large size, high cost, and the inability to further miniaturize the handle of the smart toothbrush. In addition, there is no charge and discharge protection function, which may cause overcharging and over-discharging of the battery, causing great damage to the battery and greatly reducing the battery life. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an intelligent toothbrush circuit with charging protection function, which has charging and discharging protection function, simple circuit, small size and low cost, 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] Construct a smart toothbrush circuit with charging protection function, including a main control chip and a battery protection circuit; wherein the main control chip is connected to a toothbrush drive motor, and the main control chip drives the toothbrush drive motor to work;

[0006] The main control chip is connected to an external power adapter and is also connected to the battery protection circuit. The main control chip charges the battery through the battery protection circuit. The battery protection circuit includes the battery.

[0007] The battery protection circuit protects the battery from overcharge and overdischarge;

[0008] The main control chip is also connected to a jog switch, a mode display circuit and a power display circuit, wherein the jog switch is used to set the working mode of the smart toothbrush, the mode display circuit is used to display the working mode of the smart toothbrush, and the power display circuit is used to display the power of the battery;

[0009] The working mode of the smart toothbrush is the working mode of the toothbrush drive motor;

[0010] The main control chip also detects the voltage of the battery. When the voltage of the battery is lower than the rated voltage, the main control chip stops driving the toothbrush drive motor to work.

[0011] The intelligent toothbrush circuit with charging protection function described in the utility model, wherein the positive output terminal of the power adapter is connected to the positive electrode of the diode, and the negative electrode of the diode is connected to the VCC terminal of the main control chip;

[0012] The BAT terminal of the main control chip is connected to the battery protection circuit and the GND terminal is grounded, and the negative output terminal of the power adapter is also grounded;

[0013] The OUT1 terminal of the main control chip is connected to the first terminal of the toothbrush driving motor, and the OUT2 terminal of the main control chip is connected to the second terminal of the toothbrush driving motor.

[0014] The intelligent toothbrush circuit with charging protection function described in the utility model, wherein the battery protection circuit further includes: a battery protection chip, a first resistor and capacitor, and an electrostatic protection diode;

[0015] The positive electrode of the battery is respectively connected to the BAT terminal of the main control chip, the first end of the electrostatic protection diode and the first resistor, the other end of the first resistor is connected to the VDD terminal of the battery protection chip, the VDD terminal of the battery protection chip is also connected to a capacitor, the other end of the capacitor is connected to the GND terminal of the battery protection chip; the negative electrode of the battery, the second end of the electrostatic protection diode and the other end of the capacitor are all connected to the GND terminal of the battery protection chip; multiple VM terminals of the battery protection chip are all grounded.

[0016] The intelligent toothbrush circuit with charging protection function described in the utility model, wherein the first end of the inching switch is grounded and the other end is connected to the PA3 end of the main control chip.

[0017] The intelligent toothbrush circuit with charging protection function described in the utility model, wherein the mode display circuit comprises: a second resistor, a first light emitting diode, a second light emitting diode and a third light emitting diode;

[0018] The second resistor is connected to the positive electrode of the battery and the other end is respectively connected to the positive electrode of the first light-emitting diode, the positive electrode of the second light-emitting diode and the positive electrode of the third light-emitting diode. The negative electrode of the first light-emitting diode, the negative electrode of the second light-emitting diode and the negative electrode of the third light-emitting diode are one-to-one connected to the PA4 terminal, the PA0 terminal and the PC0 terminal of the main control chip.

[0019] The intelligent toothbrush circuit with charging protection function described in the utility model, wherein the power display circuit comprises: a third resistor, a fourth resistor and a fourth light emitting diode and a fifth light emitting diode;

[0020] The third resistor and the fourth resistor are both connected to the positive electrode of the battery, the other end of the third resistor is connected to the positive electrode of the fourth light-emitting diode, and the other end of the fourth resistor is connected to the positive electrode of the fifth light-emitting diode;

[0021] The cathode of the fourth light emitting diode is connected to the PC3 terminal of the main control chip, and the cathode of the fifth light emitting diode is connected to the PA7 terminal of the main control chip.

[0022] The intelligent toothbrush circuit with charging protection function described in the utility model, wherein the model of the main control chip is WDT8M3200.

[0023] The intelligent toothbrush circuit with charging protection function described in the utility model, wherein the model of the battery protection chip is RC2201.

[0024] In the intelligent toothbrush circuit with charging protection function described in the utility model, the toothbrush driving motor is a hollow cup motor or an ultrasonic motor.

[0025] The beneficial effects of the utility model are as follows: when in use, the main control chip charges the battery through the battery protection circuit, the battery protection circuit protects the battery from overcharging and over-discharging, the inching switch is used to set the working mode of the smart toothbrush, the mode display circuit is used to display the working mode of the smart toothbrush, and the power display circuit is used to display the power of the battery; the main control chip also detects the voltage of the battery, and when the voltage of the battery is lower than the rated voltage, the main control chip stops driving the toothbrush drive motor to work, thereby avoiding draining the battery power; thereby achieving overcharging protection and discharge protection for the battery, and the circuit is simple, the cost is low, and the size is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0027] Figure 1 This is a circuit schematic diagram of the main control chip of the smart toothbrush circuit with charging protection function in a preferred embodiment of the utility model;

[0028] Figure 2 It is a circuit schematic diagram of a diode of a smart toothbrush circuit with a charging protection function in a preferred embodiment of the utility model;

[0029] Figure 3 It is a circuit schematic diagram of a toothbrush driving motor of an intelligent toothbrush circuit with a charging protection function in a preferred embodiment of the utility model;

[0030] Figure 4 It is a circuit schematic diagram of a battery protection circuit of an intelligent toothbrush circuit with a charging protection function in a preferred embodiment of the utility model;

[0031] Figure 5 This is a circuit schematic diagram of a jog switch of a smart toothbrush circuit with a charging protection function in a preferred embodiment of the utility model;

[0032] Figure 6 It is a circuit schematic diagram of a mode display circuit of a smart toothbrush circuit with a charging protection function in a preferred embodiment of the utility model;

[0033] Figure 7 It is a circuit schematic diagram of a power display circuit of an intelligent toothbrush circuit with a charging protection function according to a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be combined with the technical solution in the embodiments of the utility model for a clear and complete description. 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.

[0035] The intelligent toothbrush circuit with charging protection function in the preferred embodiment of the utility model is as follows Figure 1 See also Figures 2 to 7 ; including a main control chip U1 and a battery protection circuit 100; wherein the main control chip U1 is connected to a toothbrush drive motor M2, and the main control chip U1 drives the toothbrush drive motor M2 to work;

[0036] The main control chip U1 is connected to an external power adapter and is also connected to a battery protection circuit 100. The main control chip U1 charges the battery BAT1 through the battery protection circuit 100. The battery protection circuit 100 includes a battery BAT1.

[0037] The battery protection circuit 100 protects the battery BAT1 from overcharge and overdischarge;

[0038] The main control chip U1 is also connected to a jog switch SW1, a mode display circuit 200 and a power display circuit 300. The jog switch SW1 is used to set the working mode of the smart toothbrush, the mode display circuit 200 is used to display the working mode of the smart toothbrush, and the power display circuit 300 is used to display the power of the battery BAT1.

[0039] The working mode of the smart toothbrush is the working mode of the toothbrush drive motor M2;

[0040] The main control chip U1 also detects the voltage of the battery BAT1. When the voltage of the battery BAT1 is lower than the rated voltage (for example, 3.2V), the main control chip U1 stops driving the toothbrush drive motor M2 to work, and performs double over-discharge protection on the battery BAT1 together with the power protection chip.

[0041] When in use, the main control chip U1 charges the battery BAT1 through the battery protection circuit 100, and the battery protection circuit 100 protects the battery BAT1 from overcharging and over-discharging. The momentary switch SW1 is used to set the working mode of the smart toothbrush, the mode display circuit 200 is used to display the working mode of the smart toothbrush, and the power display circuit 300 is used to display the power of the battery BAT1; the main control chip U1 also detects the voltage of the battery BAT1. When the voltage of the battery BAT1 is lower than the rated voltage, the main control chip U1 stops driving the toothbrush drive motor M2 to work, so as to avoid draining the power of the battery BAT1; thereby realizing overcharging protection and discharge protection for the battery BAT1, and the circuit is simple, low cost and small size.

[0042] like Figure 1 , Figure 2 and Figure 3 as well as Figure 4 As shown, the positive output terminal of the power adapter is connected to the positive electrode of the diode D6, and the negative electrode of the diode D6 is connected to the VCC terminal of the main control chip U1; the diode D6 is used for reverse connection protection and voltage drop, wherein the positive electrode of the power adapter outputs 5V DC, the voltage drop of the diode D6 is 0.7V, the voltage range of the battery BAT1 is 3.7-4.2V, and the diode D6 and the battery protection chip perform double overcharge protection on the battery BAT1;

[0043] The BAT terminal of the main control chip U1 is connected to the battery protection circuit 100 and the GND terminal is grounded, and the negative output terminal of the power adapter is also grounded;

[0044] The OUT1 end of the main control chip U1 is connected to the first end of the toothbrush driving motor M2, and the OUT2 end is connected to the second end of the toothbrush driving motor M2; it should be noted that the main control chip U1 and the battery protection chip are both customized chips.

[0045] like Figure 1 and Figure 4 As shown, the battery protection circuit 100 further includes: a battery protection chip U4, a first resistor R10, a capacitor C8, and an electrostatic protection diode TVS2;

[0046] The positive electrode of the battery BAT1 is respectively connected to the BAT terminal of the main control chip U1, the first end of the electrostatic protection diode TVS2 and the first resistor R10, the other end of the first resistor R10 is connected to the VDD terminal of the battery protection chip U4, the VDD terminal of the battery protection chip U4 is also connected to the capacitor C8, the other end of the capacitor C8 is connected to the GND terminal of the battery protection chip U4; the negative electrode of the battery BAT1, the second end of the electrostatic protection diode TVS2 and the other end of the capacitor C8 are all connected to the GND terminal of the battery protection chip U4; multiple VM terminals of the battery protection chip U4 are all grounded; the battery protection chip U4 realizes overcharging and over-discharging protection of the battery BAT1 by controlling whether the negative electrode of the battery BAT1 is grounded, the first resistor R10 is used for current limiting, the capacitor C8 is used for filtering, and the electrostatic protection diode TVS2 is used for electrostatic protection.

[0047] like Figure 1 and Figure 5 As shown, the first end of the inching switch SW1 is grounded and the other end is connected to the PA3 end of the main control chip U1; the volume is small.

[0048] like Figure 1 and Figure 6 As shown, the mode display circuit 200 includes: a second resistor R1, a first light emitting diode LED1, a second light emitting diode LED2 and a third light emitting diode LED3;

[0049] The second resistor R1 is connected to the positive electrode of the battery BAT1 and the other end is respectively connected to the positive electrode of the first light-emitting diode LED1, the positive electrode of the second light-emitting diode LED2 and the positive electrode of the third light-emitting diode LED3. The negative electrode of the first light-emitting diode LED1, the negative electrode of the second light-emitting diode LED2 and the negative electrode of the third light-emitting diode LED3 are one-to-one connected to the PA4 terminal, the PA0 terminal and the PC0 terminal of the main control chip U1; the circuit is simple, low cost and small size.

[0050] like Figure 1 and Figure 7 As shown, the power display circuit 300 includes: a third resistor R3, a fourth resistor R2, a fourth light emitting diode LED4, and a fifth light emitting diode LED5;

[0051] The third resistor R3 and the fourth resistor R2 are both connected to the positive electrode of the battery BAT1, the other end of the third resistor R3 is connected to the positive electrode of the fourth light-emitting diode LED4, and the other end of the fourth resistor R2 is connected to the positive electrode of the fifth light-emitting diode LED5;

[0052] The cathode of the fourth light emitting diode LED4 is connected to the PC3 terminal of the main control chip U1, and the cathode of the fifth light emitting diode LED5 is connected to the PA7 terminal of the main control chip U1; the circuit is simple, low in cost and small in size.

[0053] like Figure 1 As shown, the model of the main control chip U1 is WDT8M3200, which has high integration.

[0054] like Figure 4 As shown, the battery protection chip U4 is model RC2201; it is small in size.

[0055] like Figure 3 As shown, the toothbrush driving motor M2 is a hollow cup motor or an ultrasonic motor to meet different usage requirements.

[0056] It should be understood that those skilled in the art 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 smart toothbrush circuit with charging protection function, comprising a main control chip and a battery protection circuit; characterized in that: The main control chip is connected to a toothbrush drive motor, and the main control chip drives the toothbrush drive motor to work; The main control chip is connected to an external power adapter and is also connected to the battery protection circuit. The main control chip charges the battery through the battery protection circuit. The battery protection circuit includes the battery. The battery protection circuit protects the battery from overcharge and overdischarge; The main control chip is also connected to a jog switch, a mode display circuit and a power display circuit, wherein the jog switch is used to set the working mode of the smart toothbrush, the mode display circuit is used to display the working mode of the smart toothbrush, and the power display circuit is used to display the power of the battery; The working mode of the smart toothbrush is the working mode of the toothbrush drive motor; The main control chip also detects the voltage of the battery. When the voltage of the battery is lower than the rated voltage, the main control chip stops driving the toothbrush drive motor to work.

2. The smart toothbrush circuit with charging protection function according to claim 1, characterized in that: The positive output terminal of the power adapter is connected to the positive electrode of the diode, and the negative electrode of the diode is connected to the VCC terminal of the main control chip; The BAT terminal of the main control chip is connected to the battery protection circuit and the GND terminal is grounded, and the negative output terminal of the power adapter is also grounded; The OUT1 terminal of the main control chip is connected to the first terminal of the toothbrush driving motor, and the OUT2 terminal of the main control chip is connected to the second terminal of the toothbrush driving motor.

3. The smart toothbrush circuit with charging protection function according to claim 2, characterized in that: The battery protection circuit further includes: a battery protection chip, a first resistor and capacitor, and an electrostatic protection diode; The positive electrode of the battery is respectively connected to the BAT terminal of the main control chip, the first end of the electrostatic protection diode and the first resistor, the other end of the first resistor is connected to the VDD terminal of the battery protection chip, the VDD terminal of the battery protection chip is also connected to a capacitor, the other end of the capacitor is connected to the GND terminal of the battery protection chip; the negative electrode of the battery, the second end of the electrostatic protection diode and the other end of the capacitor are all connected to the GND terminal of the battery protection chip; multiple VM terminals of the battery protection chip are all grounded.

4. The smart toothbrush circuit with charging protection function according to claim 3, characterized in that: The first end of the inching switch is grounded and the other end is connected to the PA3 end of the main control chip.

5. The smart toothbrush circuit with charging protection function according to claim 1, characterized in that: The mode display circuit comprises: a second resistor, a first light emitting diode, a second light emitting diode and a third light emitting diode; The second resistor is connected to the positive electrode of the battery and the other end is respectively connected to the positive electrode of the first light-emitting diode, the positive electrode of the second light-emitting diode and the positive electrode of the third light-emitting diode. The negative electrode of the first light-emitting diode, the negative electrode of the second light-emitting diode and the negative electrode of the third light-emitting diode are one-to-one connected to the PA4 terminal, the PA0 terminal and the PC0 terminal of the main control chip.

6. The smart toothbrush circuit with charging protection function according to claim 1, characterized in that: The power display circuit comprises: a third resistor, a fourth resistor, a fourth light emitting diode and a fifth light emitting diode; The third resistor and the fourth resistor are both connected to the positive electrode of the battery, the other end of the third resistor is connected to the positive electrode of the fourth light-emitting diode, and the other end of the fourth resistor is connected to the positive electrode of the fifth light-emitting diode; The cathode of the fourth light emitting diode is connected to the PC3 terminal of the main control chip, and the cathode of the fifth light emitting diode is connected to the PA7 terminal of the main control chip.

7. The smart toothbrush circuit with charging protection function according to claim 1, characterized in that: The model of the main control chip is WDT8M3200.

8. The smart toothbrush circuit with charging protection function according to claim 3, characterized in that: The model of the battery protection chip is RC2201.

9. The smart toothbrush circuit with charging protection function according to claim 1, characterized in that: The toothbrush driving motor is a coreless cup motor or an ultrasonic motor.

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