| 摘要 |
A power control device includes a multiple socket-outlet, a power plug and a power supply control circuit. The control circuit includes a power output unit, a first relay and a second relay, a first capacitor, a mechanical switch, an electronic switch and a connector connected to the host of a computer to receive a first voltage. The mechanical switch is turned on to supply power to the multiple socket-outlet, the first relay is closed, the power output unit outputs a working voltage for charging the first capacitor, the electronic switch is turned on, the second relay is closed. If the connector is turned off, the electronic switch is turned off, and the second relay is turned off so that the the multiple socket-outlet is closed. |
| 主权项 |
1. A power control device comprising:
a multiple socket-outlet; a power plug; and a control circuit connected between the multiple socket-outlet and the power plug, the control circuit comprising a power output unit, a first relay, a second relay, a first capacitor, a mechanic switch, an electronic switch, and a connector connected to a computer host to receive a first voltage; wherein a first end of the multiple socket-outlet is connected to a first end of the power plug through the mechanic switch and the first relay, the second end of the multiple socket-outlet is connected to a second end of the power plug, an input terminal of the power output unit is connected to the first end and the second end of the power plug, the output terminal of the power output unit is connected to the first relay and the second relay, the first relay is grounded through the first capacitor, the connector is connected to a control terminal of the electronic switch, a first end of the electronic switch is connected to the second relay, a second end of the electronic switch is grounded, the second rely is connected to the first end of the multiple socket-outlet, and the second relay is connected to the power plug; wherein when the mechanical switch is turned on to supply power to the multiple socket-outlet, the first relay is closed, the power output unit outputs a working voltage for charging the first capacitor, the electronic switch is turned on, the second relay is closed; wherein when the mechanical switch is turned off, the first capacitor is charged by the first voltage, and the electronic switch is turned on, and the second relay is closed; and wherein when the first voltage is turned off, the electronic switch is turned off, and the second relay is turned off so that the the multiple socket-outlet stops providing power supply. |
