Patent ID: 7965932

Claim:
An actuator, comprising: a first barrel comprising a first inner wall and a first outer wall; a second barrel movably received in the first barrel and comprising a second inner wall and a second outer wall, the first inner wall facing the second outer wall; a first magnetic portion and a second magnetic portion arranged between the first barrel and the second barrel, the first magnetic portion fixed to the first inner wall, the second magnetic portion fixed to the second outer wall, the first magnetic portion having a face facing the second magnetic portion and facing away from a central axis of the second barrel, the first and second magnetic portions configured for cooperatively driving the second barrel to move in the first barrel on a plane perpendicular to a central axis of the first barrel; and a plurality of springs elastically connected to the first inner wall and the second outer wall, for providing a restoring force between the first barrel and the second barrel when the first barrel is not coaxial with the second barrel.