US Patent 7688521 Lens actuator

A lens actuator includes a lens barrel for accommodating the lens, a coil wrapped around the lens barrel, at least one magnet, a bracket, and a resilient plate. The bracket is configured for mounting the magnets thereon and accommodating the lens barrel therein. The resilient plate is connected between the bracket and the lens barrel to hold the lens barrel on the bracket. The bracket includes an outer wall and an inner wall. At least one slit is defined between the outer wall and the inner wall. At least one opening is defined in the inner wall spatially corresponding to the at least one slit. The at least one magnet received in the at least one slit and exposed to an inside of the bracket through the at least one opening.