Patent ID: 7621725

Claim:
A swing type fan, comprising: a frame; a motor, having a shaft and fixed to the frame, wherein the shaft passes through the frame; a plurality of blades, disposed between the shaft and the frame, wherein each blade has a first side and a second side opposite to the first side, and the first sides are connected to opposite two sides of the frame in an offset manner; a plurality of first magnetic elements, disposed on the blades, wherein each first magnetic element is respectively located between the first side and the second side of the corresponding blade; and a plurality of second magnetic elements, connected to the shaft, and corresponding to the first magnetic elements; and a plurality of third magnetic elements, connected to the shaft, and disposed opposite to the second magnetic elements, wherein the second magnetic elements and the first magnetic elements are mutually attracted, the third magnetic elements and the first magnetic elements are mutually repulsed, and the second sides of the blades swing via magnetic forces between the first magnetic elements and the second magnetic elements and between the first magnetic elements and the third magnetic elements as the shaft drives the second magnetic elements and the third magnetic elements to rotate.