Patent ID: 8502096

Claim:
A power adapter, comprising: a shell; an alternate current (AC) plug for connecting to an AC power source; a power rectifier configured for converting the AC power source to a direct current (DC) power source which an electronic device needs; a DC plug for connecting to the electronic device; a first power line configured for connecting the power rectifier to the AC power source and comprising a first portion and a second portion, one end of the first portion being electrically connected to the AC plug, the other end of the first portion comprising a first terminal, one end of the second portion being electrically connected to the power rectifier, the other end of the second portion comprising a second terminal, the first terminal being positioned adjacent to the second terminal; a second power line electrically connecting the power rectifier to the DC plug; a switch received in the shell, and comprising: a fixed shaft fixed in the shell; a rotating plate rotatably positioned on the fixed shaft; a plurality of first poles and a plurality of second poles, all the first poles and the second poles equidistantly positioned on the rotating plate and arranged in a first circle, at least one of the second poles being positioned between two neighboring first poles; a plurality of conductive sheets positioned on the rotating plate and arranged in a second circle, each conductive sheet being positioned adjacent to a corresponding one of the fist poles; and a stirring device configured for driving the first poles and the second poles to rotate the rotating plate such that the conductive sheets alternate between connecting and disconnecting the first terminal to the second terminal, wherein the second power line is further fixedly connected to the stirring device and configured for pulling the stirring device to drive the first poles and the second poles.