Patent ID: 7814505

Claim:
An objective-lens driving device in which a lens holder on which an objective lens is mounted is displaceably and elastically supported by an actuator frame, wherein the lens holder is configured by coupling an upper piece and a lower piece, first bobbin portions around which respective tracking coils are wound are provided in one of the upper and lower pieces, and second bobbin portions around which respective focus coils are wound are provided in the other one of the upper and lower pieces; and the lens holder is configured by coupling the upper piece and the lower piece in such a way that the first bobbin portions and the second bobbin portions are combined such that the tracking coils and the focus coils are arranged in series in a tracking direction in such a way that tracking coils are wound around the first bobbin portions, that the focus coils are wound around the second bobbin portions, and that respective effective regions of the tracking coils and the focus coils do not overlap.