充电状态识别电路及电动牙刷

Abstract

本实用新型公开了一种充电状态识别电路及电动牙刷，充电状态识别电路包括：电压采样电路，电压采样电路的检测端与电池电连接，电压采样电路用于采样电池的电压，并输出相应的电压采样信号；提示模块；定时器，定时器用于在计时时长达到预设时长时输出控制信号；主控电路，主控电路分别与电压采样电路的输出端、提示模块、定时器和充电电路电连接，主控电路用于根据电压采样信号检测电池的电压，还用于在接收到充电信号时控制定时器进行计时；主控电路用于根据控制信号和 / 或电压采样信号控制提示模块做出相应的提示。本实用新型旨在实现准确识别电池的充电状态的功能。

Claims

1. A state of charge identification circuit applied to an electric toothbrush, the electric toothbrush comprising a battery and a charging circuit, the battery being connected to an external power supply through the charging circuit, the charging circuit being configured to output a charging signal when connected to the external power supply, characterized in that, The charging status identification circuit includes: A voltage sampling circuit, wherein the detection terminal of the voltage sampling circuit is electrically connected to the battery, the voltage sampling circuit is used to sample the voltage of the battery and output a corresponding voltage sampling signal; Prompt module; The timer is used to output a control signal when the timing duration reaches a preset duration; The main control circuit is electrically connected to the output terminal of the voltage sampling circuit, the prompt module, the timer, and the charging circuit. The main control circuit is used to detect the voltage of the battery based on the voltage sampling signal, and is also used to control the timer to start timing when the charging signal is received. The main control circuit is used to control the prompting module to make corresponding prompts based on the control signal and / or the voltage sampling signal.

2. The state of charge identification circuit according to claim 1, wherein The voltage sampling circuit includes: A first resistor and a second resistor, wherein the first end of the first resistor is electrically connected to the battery, the second end of the first resistor is connected to the first end of the second resistor and the main control circuit, and the second end of the second resistor is grounded.

3. The state of charge identification circuit according to claim 1, wherein The prompting module includes at least one light-emitting diode (LED), the anode of which is connected to a first voltage, and the cathode of which is electrically connected to the main control circuit.

4. An electric toothbrush characterized by comprising: It includes a battery, a charging circuit, and a charging status identification circuit as described in any one of claims 1 to 3; the battery is electrically connected to both the charging circuit and the charging status identification circuit, and the charging circuit is electrically connected to the charging status identification circuit.

5. The electric toothbrush of claim 4, wherein The electric toothbrush also includes: A switching circuit, wherein the input terminal of the switching circuit is electrically connected to the battery, the output terminal of the switching circuit is electrically connected to the electrical load of the electric toothbrush, and the controlled terminal of the switching circuit is electrically connected to the main control circuit; The main control circuit is used to control the switching circuit to shut off the power supply path between the battery and the electrical load of the electric toothbrush when it does not receive the charging signal and detects that the voltage of the battery is less than a preset voltage.

6. The electric toothbrush of claim 5, wherein the head is pivotally connected to the handle. The switching circuit includes: The system includes a main switch circuit and a drive circuit. The input terminal of the main switch circuit is electrically connected to the battery, and the output terminal of the main switch circuit is electrically connected to the electrical load of the electric toothbrush. The drive circuit is connected to the controlled terminals of both the main control circuit and the main switch circuit.

7. The electric toothbrush of claim 6 wherein the handle is formed of a translucent material. The main switching circuit is the first switching transistor.

8. The electric toothbrush of claim 6, wherein the head is pivotally mounted to the handle. The driving circuit includes: A first switching circuit and a second switching circuit, wherein the input terminal of the first switching circuit is connected to the controlled terminal of the main switching circuit, the output terminal of the first switching circuit is grounded, the controlled terminal of the first switching circuit is connected to the input terminal of the second switching circuit, the controlled terminal of the second switching circuit is electrically connected to the main control circuit, and the output terminal of the second switching circuit is grounded.

9. The electric toothbrush of claim 8, wherein the head is pivotally mounted to the handle. The first switching circuit includes: The circuit consists of a third resistor, a fourth resistor, a fifth resistor, and a second switching transistor. The first end of the third resistor is electrically connected to the battery. The second end of the third resistor and the controlled end of the main switching circuit are both connected to the input end of the second switching transistor. The first end of the fourth resistor is electrically connected to the battery. The second end of the fourth resistor is connected to both the controlled end of the second switching transistor and the first end of the fifth resistor. The second end of the fifth resistor and the output end of the second switching transistor are both grounded. The second switching circuit includes: The circuit includes a sixth resistor, a seventh resistor, and a third switching transistor. The input terminal of the third switching transistor is connected to the controlled terminal of the second switching transistor, and the output terminal of the third switching transistor is grounded. The controlled terminal of the third switching transistor is connected to the first terminal of the sixth resistor and the first terminal of the seventh resistor, respectively. The second terminal of the sixth resistor is electrically connected to the main control circuit, and the second terminal of the seventh resistor is grounded.

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