Patent ID: 6829202
Filing Date: 2004-12-07
Classification: G11B

Abstract:
An optical pick-up actuator, comprising:a blade having an object lens at its top center for focusing light, said blade also having a drive coil unit around its outside surface and a plurality of magnet seating holes on opposite sides of its lower surface; a tilting magnet held in each of said magnet seating holes of the blade; a plurality of suspension wires allowing a current to flow therethrough and supporting said blade; a wire holder supporting one end of each of said suspension wires; a side yoke provided at a position vertically aligned with each of the tilting magnets held in the magnet seating holes of the blade; a tilting coil held on said side yoke and electromagnetically tilting the blade at a desired angle relative to a perpendicular optical path of the object lens; a drive magnet forming a magnetic field in the drive coil unit of the blade; internal and external yokes holding said drive magnet and determining a range of the magnetic field formed in the drive coil unit, said internal and external yokes being integrated into a single structure; and a yoke plate having a beam passing hole at its central area aligned with the optical path of said object lens, thus allowing a light beam from the object lens to pass through, said yoke plate also holding said wire holder thereon.