A closed-loop control driving circuit for an intelligent toothbrush

Abstract

The utility model relates to a closed-loop control driving circuit of an intelligent toothbrush, comprising a motor driving circuit and a voice playing circuit; wherein the motor driving circuit is connected to a microcontroller, the microcontroller is connected to a charging circuit, the charging circuit is connected to a battery protection circuit, and the battery protection circuit comprises a battery; the voice playing circuit is connected to the microcontroller, and the microcontroller is also connected to an indicator light circuit and a moment switch; the microcontroller controls the motor driving circuit to drive the motor to work, the charging circuit is connected to an external power adapter to charge the battery through the battery protection circuit, the charging circuit is controlled by the microcontroller, and the battery protection circuit performs overcharging and over-discharging protection on the battery; the moment switch is used for turning the intelligent toothbrush on and off and setting the working mode, the indicator light circuit displays the charging state and working mode of the battery, and the voice playing circuit is used for playing music; thereby, the high-power motor is driven to work by the motor driving circuit, and the circuit is simple and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent toothbrush circuits, and more specifically to a closed-loop control driving circuit of an intelligent toothbrush. Background Art

[0002] Most of the existing motor drive circuits of smart toothbrushes use a dedicated main control chip (microcontroller) to directly drive the motor to work. Due to the small size of the main control chip, the driving ability is weak and the driving power is small, which cannot meet the driving requirements of high-power motors. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a closed-loop control driving circuit for an intelligent toothbrush which can drive a high-power motor and has a simple circuit 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] A closed-loop control drive circuit for a smart toothbrush is constructed, comprising a motor drive circuit and a voice playback circuit; wherein the motor drive circuit is connected to a microcontroller, the microcontroller is connected to a charging circuit, the charging circuit is connected to a battery protection circuit, and the battery protection circuit comprises a battery;

[0006] The voice playing circuit is connected to the microcontroller, and the microcontroller is also connected to an indicator light circuit and a jog switch;

[0007] The microcontroller controls the motor driving circuit to drive the motor to work, the charging circuit is connected to an external power adapter to charge the battery through the battery protection circuit, the charging circuit is controlled by the microcontroller, and the battery protection circuit protects the battery from overcharging and over-discharging;

[0008] The inching switch is used to turn the smart toothbrush on and off and set the working mode. The indicator light circuit displays the charging status of the battery and the working mode. The voice playing circuit is used to play music.

[0009] The closed-loop control driving circuit of the smart toothbrush of the utility model, wherein the motor driving circuit comprises: a first field effect tube, a second field effect tube, a third field effect tube, a fourth field effect tube and the motor;

[0010] The gate of the first field effect tube and the gate of the second field effect tube are both connected to the P05 terminal of the microcontroller, the drain of the first field effect tube is connected to the drain of the second field effect tube and is also connected to the first end of the motor, the source of the first field effect tube is connected to the positive electrode of the battery, and the source of the second field effect tube is grounded;

[0011] The gate of the third field effect transistor and the gate of the fourth field effect transistor are both connected to the P04 terminal of the microcontroller, the drain of the third field effect transistor is connected to the drain of the fourth field effect transistor and is also connected to the second end of the motor, the source of the third field effect transistor is connected to the positive electrode of the battery, and the source of the fourth field effect transistor is grounded.

[0012] The closed-loop control driving circuit of the smart toothbrush described in the utility model, wherein the charging circuit comprises: a battery charging chip and a transient suppression diode;

[0013] The VIN terminal of the battery charging chip is connected to the positive output terminal of the power adapter and the GND terminal is grounded, and the negative output terminal of the power adapter is also grounded; the negative electrode of the transient suppression diode is connected to the VIN terminal of the battery charging chip and the positive electrode is grounded;

[0014] The DONE terminal and STATUS terminal of the battery charging chip are connected one-to-one with the P01 terminal and P02 terminal of the microcontroller, the ISET terminal of the battery charging chip is connected to a first resistor and the BAT terminal is connected to the positive electrode of the battery, and the other end of the first resistor is grounded.

[0015] The closed-loop control driving circuit of the smart toothbrush described in the utility model, wherein the battery protection circuit further comprises: a battery protection chip and a second resistor;

[0016] The VDD terminal of the battery protection chip is connected to the second resistor, the other end of the second resistor is connected to the positive electrode of the battery, and the VSS terminal and S2 terminal of the battery protection chip are both connected to the negative electrode of the battery;

[0017] The V-terminal of the battery protection chip is connected to a third resistor, the other end of the third resistor is grounded, and the S1 terminal of the battery protection chip is also grounded.

[0018] The closed-loop control driving circuit of the smart toothbrush described in the utility model, wherein the voice playing circuit comprises: a voice playing chip and a speaker;

[0019] The SP-end and SP+end of the voice playing chip are connected one-to-one with the first end and the second end of the speaker, the VDD end of the voice playing chip is connected with the positive electrode of the battery and the VSS end is grounded;

[0020] The TG1 terminal of the voice playback chip is connected to the P06 terminal of the microcontroller;

[0021] A first end of the inching switch is grounded and the other end is connected to the P03 terminal of the microcontroller;

[0022] The VDD terminal of the microcontroller is connected to the positive electrode of the battery and the VSS terminal is grounded.

[0023] The closed-loop control driving circuit of the intelligent toothbrush described in the utility model, wherein the model of the microcontroller is TX1010.

[0024] The closed-loop control driving circuit of the smart toothbrush described in the utility model, wherein the model of the voice player is TV040 / 080.

[0025] In the closed-loop control driving circuit of the intelligent toothbrush described in the utility model, the model of the battery charging chip is XC3062.

[0026] The closed-loop control driving circuit of the smart toothbrush described in the utility model, wherein the model of the battery protection chip is 6006.

[0027] The beneficial effects of the utility model are as follows: a microcontroller controls a motor driving circuit to drive a motor to work, a charging circuit is connected to an external power adapter to charge a battery through a battery protection circuit, the charging circuit is controlled by the microcontroller, and the battery protection circuit protects the battery from overcharging and over-discharging; a momentary switch is used to turn the smart toothbrush on and off and set the working mode, an indicator light circuit displays the charging status and working mode of the battery, and a voice playing circuit is used to play music; thereby, a high-power motor is driven to work by the motor driving circuit, and the circuit is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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:

[0029] Figure 1 It is a circuit schematic diagram of a microcontroller of a closed-loop control drive circuit of an intelligent toothbrush in a preferred embodiment of the utility model;

[0030] Figure 2 It is a circuit schematic diagram of a motor drive circuit of a closed-loop control drive circuit of an intelligent toothbrush in a preferred embodiment of the utility model;

[0031] Figure 3It is a circuit schematic diagram of a charging circuit of a closed-loop control drive circuit of a smart toothbrush in a preferred embodiment of the utility model;

[0032] Figure 4 It is a circuit schematic diagram of a battery protection circuit of a closed-loop control drive circuit of an intelligent toothbrush in a preferred embodiment of the utility model;

[0033] Figure 5 It is a circuit schematic diagram of a voice playing circuit of a closed-loop control driving circuit of a smart toothbrush in a preferred embodiment of the utility model;

[0034] Figure 6 It is a circuit schematic diagram of a jog switch of a closed-loop control drive circuit of a smart toothbrush in a preferred embodiment of the utility model;

[0035] Figure 7 It is a circuit schematic diagram of an indicator light circuit of a closed-loop control drive circuit of an intelligent toothbrush in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0036] 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.

[0037] The closed-loop control driving circuit of the smart toothbrush in the preferred embodiment of the utility model is as follows Figure 1 See also Figures 2 to 7 ; It includes a motor drive circuit 100 and a voice playback circuit 400; wherein the motor drive circuit 100 is connected to the microcontroller U5, the microcontroller U5 is connected to the charging circuit 200, the charging circuit 200 is connected to the battery protection circuit 300, and the battery protection circuit 300 includes a battery (not shown in the figure);

[0038] The voice playing circuit 400 is connected to the microcontroller U5, and the microcontroller U5 is also connected to the indicator light circuit 500 and the inching switch SW1;

[0039] The microcontroller U5 controls the motor driving circuit 100 to drive the motor to work, the charging circuit 200 is connected to an external power adapter to charge the battery through the battery protection circuit 300, the charging circuit 200 is controlled by the microcontroller U5, and the battery protection circuit 300 protects the battery from overcharging and over-discharging; wherein the motor is an ultrasonic motor;

[0040] The inching switch SW1 is used to turn the smart toothbrush on and off and set the working mode. The indicator light circuit 500 displays the battery charging status and working mode. The voice playing circuit 400 is used to play music. Figure 7 As shown, the indicator light circuit 500 is composed of two two-color light emitting diodes and is controlled by the microcontroller U5, and displays the charging status and the working mode through different lighting states;

[0041] The microcontroller U5 controls the motor driving circuit 100 to drive the motor to work, the charging circuit 200 is connected to an external power adapter to charge the battery through the battery protection circuit 300, the charging circuit 200 is controlled by the microcontroller U5, and the battery protection circuit 300 protects the battery from overcharging and over-discharging; the momentary switch SW1 is used to turn the smart toothbrush on and off and set the working mode, the indicator light circuit 500 displays the charging status and working mode of the battery, and the voice playing circuit 400 is used to play music; thereby, the motor driving circuit 100 is used to drive a high-power motor to work, and the circuit is simple and the cost is low.

[0042] like Figure 1 and Figure 2 As shown, the motor driving circuit 100 includes: a first field effect transistor Q2, a second field effect transistor Q1, a third field effect transistor Q4, a fourth field effect transistor Q3 and a motor;

[0043] The gate of the first field effect transistor Q2 and the gate of the second field effect transistor Q1 are both connected to the P05 terminal of the microcontroller U5, the drain of the first field effect transistor Q2 is connected to the drain of the second field effect transistor Q1 and is also connected to the first end of the motor, the source of the first field effect transistor Q2 is connected to the positive electrode of the battery, and the source of the second field effect transistor Q1 is grounded;

[0044] The gate of the third field effect transistor Q4 and the gate of the fourth field effect transistor Q3 are both connected to the P04 terminal of the microcontroller U5, the drain of the third field effect transistor Q4 is connected to the drain of the fourth field effect transistor Q3 and is also connected to the second end of the motor, the source of the third field effect transistor Q4 is connected to the positive electrode of the battery, and the source of the fourth field effect transistor Q3 is grounded; an H-bridge drive circuit is formed to realize forward and reverse drive of the motor.

[0045] like Figure 1 and Figure 3 as well as Figure 4 As shown, the charging circuit 200 includes: a battery charging chip U1 and a transient suppression diode TVS1;

[0046] The VIN terminal of the battery charging chip U1 is connected to the positive output terminal of the power adapter and the GND terminal is grounded, and the negative output terminal of the power adapter is also grounded; the negative electrode of the transient suppression diode TVS1 is connected to the VIN terminal of the battery charging chip U1 and the positive electrode is grounded, which is used for surge protection;

[0047] The DONE terminal and STATUS terminal of the battery charging chip U1 are connected one-to-one with the P01 terminal and P02 terminal of the microcontroller U5 to control the battery charging chip U1 to work; the ISET terminal of the battery charging chip U1 is connected to the first resistor and the BAT terminal is connected to the positive electrode of the battery, and the other end of the first resistor is grounded, meeting the use requirements of the battery charging chip U1.

[0048] like Figure 3 and Figure 4 As shown, the battery protection circuit 300 further includes: a battery protection chip U4 and a second resistor R12;

[0049] The VDD terminal of the battery protection chip U4 is connected to the second resistor R12, the other end of the second resistor R12 is connected to the positive electrode of the battery, and the VSS terminal and S2 terminal of the battery protection chip U4 are both connected to the negative electrode of the battery;

[0050] The V- terminal of the battery protection chip U4 is connected to a third resistor R13, the other end of the third resistor R13 is grounded, and the S1 terminal of the battery protection chip U4 is also grounded; the battery protection chip U4 implements overcharge and over-discharge power-off protection for the battery by controlling the on and off of the negative electrode of the battery.

[0051] like Figure 1 and Figure 7 As shown, the voice playing circuit 400 includes: a voice playing chip U2 and a speaker (not shown in the figure);

[0052] The SP- and SP+ terminals of the voice playing chip U2 are connected one-to-one with the first and second terminals of the speaker, the VDD terminal of the voice playing chip U2 is connected with the positive electrode of the battery and the VSS terminal is grounded; the volume of the voice playing chip U2 for playing music is small and easy to design;

[0053] The TG1 terminal of the voice playback chip U2 is connected to the P06 terminal of the microcontroller U5; the first terminal of the momentary switch SW1 is grounded and the other terminal is connected to the P03 terminal of the microcontroller U5; the VDD terminal of the microcontroller U5 is connected to the positive pole of the battery and the VSS terminal is grounded.

[0054] like Figure 1 As shown, the microcontroller U5 is model TX1010, which has low cost and small size.

[0055] like Figure 5 As shown, the model of the voice player is TV040 / 080; it has low cost and small size.

[0056] like Figure 3 As shown, the battery charging chip U1 is a model XC3062, which has low cost and small size.

[0057] like Figure 4 As shown, the battery protection chip U4 is model 6006; it has low cost and small size.

[0058] 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 closed-loop control driving circuit for a smart toothbrush, comprising a motor driving circuit and a voice playing circuit; characterized in that: The motor drive circuit is connected to a microcontroller, the microcontroller is connected to a charging circuit, the charging circuit is connected to a battery protection circuit, and the battery protection circuit includes a battery; The voice playing circuit is connected to the microcontroller, and the microcontroller is also connected to an indicator light circuit and a jog switch; The microcontroller controls the motor driving circuit to drive the motor to work, the charging circuit is connected to an external power adapter to charge the battery through the battery protection circuit, the charging circuit is controlled by the microcontroller, and the battery protection circuit protects the battery from overcharging and over-discharging; The inching switch is used to turn the smart toothbrush on and off and set the working mode. The indicator light circuit displays the charging status of the battery and the working mode. The voice playing circuit is used to play music.

2. The closed-loop control driving circuit of the smart toothbrush according to claim 1, characterized in that: The motor driving circuit comprises: a first field effect transistor, a second field effect transistor, a third field effect transistor, a fourth field effect transistor and the motor; The gate of the first field effect tube and the gate of the second field effect tube are both connected to the P05 terminal of the microcontroller, the drain of the first field effect tube is connected to the drain of the second field effect tube and is also connected to the first end of the motor, the source of the first field effect tube is connected to the positive electrode of the battery, and the source of the second field effect tube is grounded; The gate of the third field effect transistor and the gate of the fourth field effect transistor are both connected to the P04 terminal of the microcontroller, the drain of the third field effect transistor is connected to the drain of the fourth field effect transistor and is also connected to the second end of the motor, the source of the third field effect transistor is connected to the positive electrode of the battery, and the source of the fourth field effect transistor is grounded.

3. The closed-loop control driving circuit of the smart toothbrush according to claim 1, characterized in that: The charging circuit comprises: a battery charging chip and a transient suppression diode; The VIN terminal of the battery charging chip is connected to the positive output terminal of the power adapter and the GND terminal is grounded, and the negative output terminal of the power adapter is also grounded; the negative electrode of the transient suppression diode is connected to the VIN terminal of the battery charging chip and the positive electrode is grounded; The DONE terminal and STATUS terminal of the battery charging chip are connected one-to-one with the P01 terminal and P02 terminal of the microcontroller, the ISET terminal of the battery charging chip is connected to a first resistor and the BAT terminal is connected to the positive electrode of the battery, and the other end of the first resistor is grounded.

4. The closed-loop control driving circuit of the smart toothbrush according to claim 3, characterized in that: The battery protection circuit also includes: a battery protection chip and a second resistor; The VDD terminal of the battery protection chip is connected to the second resistor, the other end of the second resistor is connected to the positive electrode of the battery, and the VSS terminal and S2 terminal of the battery protection chip are both connected to the negative electrode of the battery; The V-terminal of the battery protection chip is connected to a third resistor, the other end of the third resistor is grounded, and the S1 terminal of the battery protection chip is also grounded.

5. The closed-loop control driving circuit of the smart toothbrush according to claim 1, characterized in that: The voice playing circuit comprises: a voice playing chip and a speaker; The SP-end and SP+end of the voice playing chip are connected one-to-one with the first end and the second end of the speaker, the VDD end of the voice playing chip is connected with the positive electrode of the battery and the VSS end is grounded; The TG1 terminal of the voice playback chip is connected to the P06 terminal of the microcontroller; A first end of the inching switch is grounded and the other end is connected to the P03 terminal of the microcontroller; The VDD terminal of the microcontroller is connected to the positive electrode of the battery and the VSS terminal is grounded.

6. The closed-loop control driving circuit of the smart toothbrush according to claim 1, characterized in that: The microcontroller is model TX1010.

7. The closed-loop control driving circuit of the smart toothbrush according to claim 5, characterized in that: The model of the voice playback chip is TV040 / 080.

8. The closed-loop control driving circuit of the smart toothbrush according to claim 3, characterized in that: The model of the battery charging chip is XC3062.

9. The closed-loop control driving circuit of the smart toothbrush according to claim 4, characterized in that: The model of the battery protection chip is 6006.

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