Abstract: A power-supplying device includes: a housing of which one end has an electrically connecting end to connect a power source, the housing has at least a power supplying jack for connecting; a jack for a universal serial bus (USB) provided on the housing for connecting an inserted electric wire with a USB port of the computer; a control circuit provided in the housing and having an electronic switch to connect between the electrically connecting end and the power supplying jack, one end thereof is connected to the jack for the USB to detect the voltage of power source of the USB; and a manual switch provided on the housing, two end connecting points thereof are parallelly connected with the control circuit. Thereby, the power supplying structure can detect the voltage of power source of the USB to judge whether the computer is turned on and to render the actions of power supplying to go simultaneously.

Abstract: A power-supplying device includes: a housing of which one end has an electrically connecting end to connect a power source, the housing has at least a power supplying jack for connecting; a jack for a universal serial bus (USB) provided on the housing for connecting an inserted electric wire with a USB port of the computer; a control circuit provided in the housing and having an electronic switch to connect between the electrically connecting end and the power supplying jack, one end thereof is connected to the jack for the USB to detect the voltage of power source of the USB; and a manual switch provided on the housing, two end connecting points thereof are parallelly connected with the control circuit. Thereby, the power supplying structure can detect the voltage of power source of the USB to judge whether the computer is turned on and to render the actions of power supplying to go simultaneously.