US Patent 8009372 Lens driving device

A lens driving device comprises an annular magnet carriage acting as the outer frame of the lens driving device. A magnet and a coil are disposed in the annular magnet carriage. A lens holder with a lens is disposed in the central circular hole of the annular magnet carriage. A front spring with front gasket is disposed in front of the lens holder, and a rear springs with rear gasket is disposed in back of the lens holder. The annular magnet carriage, the front spring, the rear spring, the front gasket, the rear gasket, the lens holder, and the base are all in the shape of flat plate and nested connect with each other to form a position mechanism.