Patent ID: 8212435

Claim:
A voice coil motor (VCM) comprising: a first magnet arrangement, the first magnet arrangement including at least a first magnet and a second magnet, at least one of the first magnet and the second magnet having a cross-section that is non-rectangular with respect to a plane, wherein the first magnet is arranged substantially at a center of the first magnet arrangement and the first magnet and the second magnet are arranged to be in contact; a second magnet arrangement, the second magnet arrangement including at least a third magnet and a fourth magnet, at least one of the third magnet and the fourth magnet having a cross-section that is non-rectangular with respect to the plane, wherein the third magnet is arranged substantially at a center of the second magnet arrangement and the third magnet and the fourth magnet are arranged to be in contact, wherein at least one of the first magnet arrangement and the second magnet arrangement has a hollow cylindrical shape; a coil arrangement, the coil arrangement being at least partially positioned between the first magnet arrangement and the second magnetic arrangement, the coil arrangement being arranged to receive current to cause the coil arrangement to generate force relative to the first magnet arrangement and the second magnet arrangement; and a flux return, the flux return being arranged to carry flux between the first magnet arrangement and the second magnet arrangement.