Vehicle-mounted automatic power-off mobile phone charger

Abstract

The invention provides a vehicle-mounted automatic power-off mobile phone charger. The charger comprises a shell, a timing button, a power-off protection unit, a vehicle-mounted charging circuit and a USB connecting wire, wherein the power-off protection unit and the vehicle-mounted charging circuit are both arranged in the shell; a controller is connected with a timer; the timing button is arranged on the shell; the timing button is connected with the timer; the shell is provided with a USB interface and a power supply connector; the vehicle-mounted charging circuit is connected with the USB connecting wire through the USB interface; the power-off protection unit comprises the controller, a relay and the timer; the vehicle-mounted charging circuit is connected with the power supply connector through the relay; the power supply connector is connected with a power supply socket of a car; and the relay is further connected with the controller. The mobile phone charger can realize automatic disconnection between the vehicle-mounted charging circuit and the power supply, can realize power-off protection on the charger and can improve the use safety of the charger so as to prevent the charger from being damaged excessively fast due to long-term use, or to avoid potential safety hazards of spontaneous combustion and the like; and after power-off, the charger does not continue to work, so that a certain energy-saving effect is realized.

Description

technical field [0001] The invention relates to a vehicle-mounted automatic power-off mobile phone charger. Background technique [0002] The mobile phone charger converts high voltage into low voltage through a transformer. If it is not unplugged for a long time, it will always work. The charger still consumes power if it is not unplugged, and the largest power consumption of the mobile phone charger is 308 milliwatts. The charger is not unplugged from the power socket. Although the charger is not connected to the mobile phone, the circuit board inside the charger is powered on and still working, which will still consume power. [0003] After the charger works for a long time, the charger will heat up, and the insulation layer of the coil may be melted, causing a short circuit. The charger is very small, there is no space and no heat dissipation, whether it is overheated or short-circuited, it is easy to cause combustion. Generally, a mobile phone can be fully charged wi...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a vehicle-mounted automatic power-off mobile phone charger to solve the problem in the prior art that the charger is not unplugged for a long time and there are great fire hazards and other hidden dangers

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