Patent ID: 7327644

Claim:
An optical pickup provided with a moving base moving in a radial direction of a disc-shaped recording medium mounted on a disc table, and an objective lens driving apparatus arranged in said moving base, wherein said objective lens driving apparatus includes: a fixed block fixed to said moving base; a movable block moving in a focusing direction being one in which the movable block approaches to or withdraws from a recording surface of said disc-shaped recording medium against said fixed block, a tracking direction being substantially a radial direction of said disc-shaped recording medium, and a tilt direction being a rotation direction around an axis orthogonal to both of the focusing direction and the tracking direction, and holding said objective lens; a support spring connecting said fixed block and said movable block with each other; a focusing coil to be energized at an operation of said movable block in the focusing direction; a tracking coil to be energized at an operation of said movable block in the tracking direction; a tilt coil to be energized at an operation of said movable block in the tilt direction; a first magnet constituting a first magnetic circuit together with said focusing coil and said tracking coil; and a second magnet constituting a second magnetic circuit together with said tilt coil, arranged in a state being inserted into said tilt coil, wherein: said objective lens and said second magnet are positioned separately in a direction orthogonal to both of the focusing direction and the tracking direction, said second magnet has an N pole and an S pole, both polarized in juxtaposition in the tracking direction, and portions of said tilt coil opposed to each other in the tracking direction with said second magnet put therebetween are severally formed to be a tilt drive portion for moving said movable block in the tilt direction.