Patent ID: 7983551
Filing Date: 2011-07-19
Classification: H02K

Abstract:
1. A lens actuator comprising: a fixed unit, the fixed unit comprising a fixed barrel and a plurality of magnets mounted on the fixed barrel, the fixed barrel comprising a first receiving cavity in a center thereof, the magnets arranged symmetrically around a central axis of the fixed barrel, each magnet comprising a plate body, a first part, a second part parallel with the first part, and a third part parallel with and between the first and second parts, the first and second parts respectively extending from opposite sides of the plate body, the first part having the same magnetic pole as the second part, the third part being formed on the plate body, and the magnetic pole of the third part being different from that of the first part; a movable unit received in the first receiving cavity, the movable unit comprising a lens barrel, and a plurality of coils connected with the outer wall of the lens barrel and facing the respective magnets, the coils arranged symmetrically around the central axis of the lens barrel; and a plurality of connecting wires for connecting the fixed unit with the movable unit.