Abstract: An electronic device includes a metal back cover, a metal frame, and a first, second, third, and fourth radiators. The metal frame includes a discrete part and two connection parts. The connection parts are located by two sides of the discrete part, separated from the discrete part, and connected to the metal back cover. A U-shaped slot is formed between the discrete part and the metal back cover and between the discrete part and the connection parts. The first radiator is separated from the discrete part and includes a feed end. The second, third, and fourth radiators are connected to the discrete part and the metal back cover. The third radiator is located between the first and second radiators. The first radiator is located between the third and fourth radiators. The discrete part and the first, second, third, and fourth radiators form an antenna module together.

Abstract: An air sealing body capable of intensifying air-tightness comprises two outer membranes and two inner membranes. At least a heat resistant section is formed between the inner membranes by means of coated heat resistant material. Four sides of the two outer membranes are thermally sealed and an air filling passage, an air inlet and an air column are thermally formed to across the heat resistant section. The heat resistant section is further thermally sealed with the thermal seal spots. Hence, a structure with the air inlet being forcedly opened during air being filled is constituted and a curved surface zone is formed at the air column near the air filling side. Multiple wrinkles are produced between the inner membranes. A column zone is disposed at a side of the curved surface zone. At least a ring-shaped thermal seal line is attached to at least the inner membranes and disposed next to the column surface zone and outside the curved surface zone.

Abstract: A power supplying system includes a switching control circuit connected to a stand-by power source so as to receive electrical power therefrom. The switching control circuit is further connected to a power-supplying unit and is activated to control operation of the power-supplying unit in a selected one of an ON state, where the power-supplying unit supplies electrical power for operating a heat-dissipating fan, and an OFF state, where the power-supplying unit ceases to supply the electrical power to the heat-dissipating fan.