Energy-saving electric toothbrush capable of achieving complete power-off

Abstract

The application provides an energy-saving electric toothbrush capable of realizing complete disconnection of power supply, and is characterized by comprising a main controller, a switch, a battery, an on-off control circuit, an on-off trigger circuit and a voltage conversion circuit; one end of the on-off control circuit is connected with the battery, and the other end is connected with an input end of the voltage conversion circuit; an output end of the voltage conversion circuit provides a direct-current voltage output; the on-off trigger circuit is connected with the main controller and the switch respectively and is used for driving the on-off control circuit to realize connection or cut-off. The application sets the on-off control circuit between the power supply and the control system, when a user performs a shutdown operation, the circuit between the power supply and the control system is disconnected, the control system is closed, the loss of electric energy is reduced, and the long-term standby capacity of the electric toothbrush is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to an electric toothbrush, in particular to an energy-saving electric toothbrush capable of completely disconnecting power supply. BACKGROUND

[0002] The electric toothbrush is a new oral cleaning appliance in recent years, which mainly consists of a vibration motor, a battery, a control system, an electric toothbrush shell and an electric toothbrush head. The working principle is that the user inputs a signal through a button, and a control chip in the control system receives and outputs a motor driving signal, so as to realize motor vibration, which is transmitted to the electric toothbrush head through a motor transmission shaft, thereby realizing work. In the traditional electric toothbrush, when the motor is off, the control system and the power supply are still in the on state, which cannot realize true disconnection, resulting in continuous consumption of electric energy and affecting the long-term machine ability of the electric toothbrush. SUMMARY

[0003] In view of the problems mentioned in the background art, the present application provides an energy-saving electric toothbrush capable of completely disconnecting power supply, which is realized by the following technical means:

[0004] An energy-saving electric toothbrush capable of completely disconnecting power supply, which comprises a main controller, a switch, a battery, a on-off control circuit, a on-off trigger circuit and a voltage conversion circuit. One end of the on-off control circuit is connected with the battery, and the other end is connected with the input end of the voltage conversion circuit. The output end of the voltage conversion circuit provides a direct current voltage output. The on-off trigger circuit is connected with the main controller and the switch respectively, and is used to drive the on-off control circuit to realize connection or cut-off.

[0005] In one or more embodiments of the present application, the on-off control circuit comprises a first switch tube connected with the battery and the voltage conversion circuit. The control pin of the first switch tube is connected to the on-off trigger circuit, which triggers the on-off control of the first switch tube.

[0006] In one or more embodiments of the present application, the on-off trigger circuit comprises a second switch tube, a third switch tube and a fourth switch tube. One pin of the second switch tube and one pin of the third switch tube are connected, and the other pin is connected to the ground respectively. The connection point of the second switch tube and the third switch tube is connected with the on-off control circuit. The fourth switch tube is connected between the VCC end and the ground end. The control electrode of the second switch tube is connected to the main controller to obtain the control signal of the main controller. The control pins of the third switch tube and the fourth switch tube are commonly connected to the switch. The main controller is connected to the collector of the fourth switch tube.

[0007] In one or more embodiments of the present application, the second switch tube is a triode Q2, the third switch tube is a triode Q3A, and the fourth switch tube is a triode Q3B; the base of the triode Q2 is connected to a main controller, the collector thereof is connected to the collector of the triode Q3A, and the emitter thereof is grounded; the base of the triode Q3A and the base of the triode Q3B are commonly connected to the switch, the emitter of the triode Q3A and the emitter of the triode Q3B are grounded; the collector of the triode Q3B is connected to a VCC terminal, and the main controller is connected to and collects the voltage of the collector of the triode Q3B; and the collector of the triode Q2 is connected to an on-off control circuit.

[0008] In one or more embodiments of the present application, the on-off trigger circuit comprises an over-discharge protection module U1, the input terminal of the over-discharge protection module U1 is connected to a battery, and the output terminal thereof is connected to the switch.

[0009] In one or more embodiments of the present application, the on-off trigger circuit comprises a diode D1, voltage dividing resistors R4 and R5, the anode of the diode D1 is connected to a main controller, the cathode thereof is grounded through the voltage dividing resistors R4 and R5, and the connection point of the voltage dividing resistors R4 and R5 is connected to the base of the triode Q2.

[0010] In one or more embodiments of the present application, the voltage conversion circuit comprises capacitors C1 and C2, an inductor L1, and a voltage conversion module U2, the input terminal of the voltage conversion module U2 is connected to the inductor L1, and the output terminal thereof is connected to the capacitor C2; the other end of the inductor L1 is connected to the output terminal of the on control circuit, and the one end thereof is connected to the capacitor C1.

[0011] The present application has the following beneficial effects: by arranging the on-off control circuit in the power supply and the control system, when the user performs the shutdown operation, the circuit between the power supply and the control system is disconnected, the control system is turned off, the loss of electric energy is reduced, and the long-term standby ability of the electric toothbrush is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a power supply circuit diagram of an existing electric toothbrush.

[0013] Figure 2 It is a power supply circuit diagram of the present application. DETAILED DESCRIPTION

[0014] The present application is further described below in combination with the drawings:

[0015] Referring to the drawings Figure 1The power supply circuit of the conventional electric toothbrush mainly comprises a battery BAT, a battery over-discharge protection module U1 and a voltage conversion module U2. When the voltage of the battery BAT is higher than the cut-off voltage of the over-discharge protection module U1, the output voltage of the over-discharge protection module U1 is equal to the voltage of the battery BAT. At this time, the output voltage of the over-discharge protection module U1 makes the transistor Q2 conduct, and the conductive Q2 makes the P-type metal oxide semiconductor field effect transistor Q1 conduct. After the transistor Q1 is conducted, the battery voltage is transmitted from the VBAT to the end of the capacitor C1 and the inductor L1, and the output voltage VCC is output after the voltage conversion module U2, which is used for the system.

[0016] The principle of realizing the on-off of the conventional electric toothbrush is that when the on-off key S1 is pressed, the high level of KEY_ON becomes low level. When the system main controller detects the low level signal, the toothbrush drive and the display corresponding mode and the power indication are turned on, and the electric toothbrush works normally. When the on-off key S1 is pressed, the system main controller detects the signal that the key is pressed, and the system will turn off the toothbrush drive and the corresponding display, and the electric toothbrush stops working. When the key S1 is released, the MOS tube Q1 is still in the conductive state, so there is still voltage output at VCC. Because the power management chip and the related power consumption components are still in the power-on state, the system is still consuming the battery power, which reduces the actual use time of the battery.

[0017] Referring to the accompanying drawings Figure 2 An energy-saving electric toothbrush capable of completely disconnecting the power supply comprises a main controller, a switch, a battery, a on-off control circuit, a on-off trigger circuit and a voltage conversion circuit. One end of the on-off control circuit is connected with the battery, and the other end is connected with the input end of the voltage conversion circuit. The output end of the voltage conversion circuit provides a direct current voltage output. The on-off trigger circuit is connected with the main controller and the switch respectively, and is used for driving the on-off control circuit to realize the connection or cut-off.

[0018] Specifically, the on-off control circuit comprises a MOS tube Q1 (i.e. a first switch tube). The two ends of the MOS tube Q1 are connected with the battery and the output circuit respectively, and the gate is connected to the on-off trigger circuit.

[0019] The on-off trigger circuit comprises overdischarge protection module U1, transistor Q2 (i.e. second switch tube), Q3A (i.e. third switch tube) and Q3B (i.e. fourth switch tube), diode D1, voltage dividing resistor R4 and R5; the base of the transistor Q2 is connected to the main controller, the collector thereof is connected to the collector of the transistor Q3A, and the emitter thereof is grounded; the base of the transistor Q3A is commonly connected to the base of the transistor Q3B, and the button K1 (i.e. the switch) is connected; the emitter of the transistor Q3A is grounded, and the emitter of the transistor Q3B is grounded; the collector of the transistor Q3B is connected to the VCC end through the resistor R2, and the main controller is connected to and collects the voltage of the collector of the transistor Q3B; the collector of the transistor Q2 is connected to the on-off control circuit. The input end of the overdischarge protection module U1 is connected to the battery, and the output end thereof is connected to the button K1. The anode of the diode D1 is connected to the main controller, the cathode thereof is grounded through the voltage dividing resistor R4 and R5, and the connection point of the voltage dividing resistor R4 and R5 is connected to the base of the transistor Q2.

[0020] The voltage conversion circuit comprises capacitors C1 and C2, inductor L1 and voltage conversion module U2, the input end of the voltage conversion module U2 is connected to the inductor L1, the output end thereof is connected to the capacitor C2; the other end of the inductor L1 is connected to the output end of the on control circuit, and the one end is connected to the capacitor C1.

[0021] The working principle of the electric toothbrush of the embodiment is as follows: when the battery voltage is higher than the cut-off voltage of the over-discharge protection module U1, the output voltage of the over-discharge protection module U1 is equal to the battery voltage; after the button K1 is pressed, the output voltage of the over-discharge protection module U1 makes the transistors Q3A and Q3B conduct, the conduction of the transistor Q3A makes the P-type metal oxide semiconductor field effect transistor Q1 (i.e. the P-type MOS tube Q1) conduct, the conduction of the MOS tube Q1 makes the battery voltage be transmitted from the VBAT to the capacitor C1 and the inductor L1, and the output voltage VCC is output after the voltage conversion module U2, for the system to use. The conduction of the transistor Q3B makes the Button level signal be low, and when the main controller detects the low level signal, a high level is immediately output to the POWER_EN, the high level signal makes the transistor Q2 conduct through the diode D1 and the voltage dividing resistors R4 and R5, and the MOS tube Q1 is kept conducting. At this time, the main controller will start the toothbrush drive and display the corresponding mode and the power indication, and the electric toothbrush works normally; the button K1 is released, and the Button level signal is high. When the button K1 is pressed during the shutdown, when the main controller detects that the Button level signal is low again, the system outputs a low level to the POWER_EN to the transistor Q2 to cut off and turn off the toothbrush drive and the corresponding display, and the electric toothbrush stops working. The button K1 is released, the transistors Q3A and Q3B are cut off, the cut-off of the transistor Q3A causes the MOS tube Q1 to be cut off, the battery voltage cannot be transmitted from the battery to the capacitor C1 and the inductor L1, and therefore there is no voltage output at the VCC, and the whole system is in a complete power-off state.

[0022] The above preferred embodiment should be regarded as an example of the embodiment of the application, and any technical deduction, replacement, improvement and the like made similarly, approximately or based on the above should be regarded as the protection scope of the patent.

Claims

1. An energy saving electric toothbrush capable of achieving complete power-off, characterized in that, The application relates to a power supply circuit, which comprises a main controller, a switch, a battery, a on-off control circuit, a on-off trigger circuit and a voltage conversion circuit; one end of the on-off control circuit is connected with the battery, the other end is connected with the input end of the voltage conversion circuit, and the output end of the voltage conversion circuit provides a direct current voltage output; the on-off trigger circuit is connected with the main controller and the switch respectively and is used for driving the on-off control circuit to realize on or off. The on-off trigger circuit comprises a second switch tube, a third switch tube and a fourth switch tube; one foot of the second switch tube is connected with one foot of the third switch tube, the other foot is connected with the ground respectively, and the connecting point of the second switch tube and the third switch tube is connected with the on-off control circuit; the fourth switch tube is connected between the VCC end and the ground end, the control electrode of the second switch tube is connected to the main controller to obtain the control signal of the main controller, the control feet of the third switch tube and the fourth switch tube are commonly connected to the switch, and the main controller is connected with the collector of the fourth switch tube. The second switch tube is a triode Q2, the third switch tube is a triode Q3A, and the fourth switch tube is a triode Q3B; the base of the triode Q2 is connected to the main controller, the collector thereof is connected with the collector of the triode Q3A, and the emitter thereof is connected with the ground; the base of the triode Q3A and the base of the triode Q3B are commonly connected to the switch, the emitter of the triode Q3A and the emitter of the triode Q3B are connected with the ground; the collector of the triode Q3B is connected to the VCC end, and the main controller is connected with and collects the voltage of the collector of the triode Q3B; the collector of the triode Q2 is connected with the on-off control circuit.

2. The energy saving electric toothbrush capable of achieving complete disconnection of the power supply according to claim 1, characterized in that, The on-off control circuit comprises a first switch tube connected with the battery and the voltage conversion circuit, and the control foot of the first switch tube is connected to the on-off trigger circuit to trigger the on or off of the first switch tube.

3. The energy saving electric toothbrush capable of achieving complete power-off according to claim 1, characterized in that, The on-off trigger circuit comprises an overdischarge protection module U1, the input end of the overdischarge protection module U1 is connected with the battery, and the output end thereof is connected with the switch.

4. The energy saving electric toothbrush capable of achieving complete disconnection of the power supply according to claim 3, characterized in that, The on-off trigger circuit comprises a diode D1, voltage dividing resistors R4 and R5, the anode of the diode D1 is connected to the main controller, the cathode thereof is connected with the ground through the voltage dividing resistors R4 and R5, and the connecting point of the voltage dividing resistors R4 and R5 is connected with the base of the triode Q2.

5. The energy saving electric toothbrush capable of achieving complete power-off according to any one of claims 1-4, characterized in that, The voltage conversion circuit comprises capacitors C1 and C2, an inductor L1 and a voltage conversion module U2, the input end of the voltage conversion module U2 is connected with the inductor L1, the output end thereof is connected with the capacitor C2; the other end of the inductor L1 is connected with the output end of the on-off control circuit, and the one end is connected with the capacitor C1.

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