Objective lens drive device, optical pickup device using this objective lens drive device, and optical disc recording and playback device

摘要

It realizes miniaturization and thinning of the entire apparatus and achieves miniaturization and thinning of the optical disc recording and reproducing apparatus.;An objective lens 51 is mounted on one end and a bobbin 52 mounted on a focusing coil 66 on the other end. One end is mounted on one end side on which the objective lens 51 of the bobbin 52 is mounted, and the other end side is supported on the support holder 55 and the elastic supports 53 and 54, respectively. And a yoke 57 to which the magnet 64 is mounted, and the bobbin 52 is parallel to the optical axis of the objective lens 51 by the magnet 64 and the focusing coil 66. The magnetic circuit 56 which drives in the direction is comprised.;The distance from the support holder 55 to the objective lens 51 becomes small by providing the magnet 64 and the focusing coil 66 between the objective lens 51 and the support holder 55.