Patent attributes
An optical pickup has an objective lens drive device which includes a fixed block fixed to a movement base, a movable block having an objective lens and a lens holder that holds the objective lens, a plurality of support springs that couples the fixed block with the movable block, and a focusing magnetic coil that operates the movable block in a focusing direction. A distance between the fixed block and a recording surface of a disk recording medium is larger than a distance between the movable block and the recording surface. The support springs are inclined with respect to the recording surface. The support springs have a longitudinal direction orthogonal to a direction of a thrust generated at the focusing magnetic circuit to the movable block during a focusing operation.
