Objective lens driving apparatus and optical head driving apparatus.

摘要

An object lens driving apparatus for driving, in a focus direction and a tracking control direction, an objective lens (6) for converging light onto an optical recording medium includes a lens bobbin (7) for holding the objective lens. The lens bobbin is provided with two types of drive coils (8, 9) for driving the lens bobbin in the focus and tracking control directions. The lens bobbin is attached in a floating state to a frame-shaped magnetic yoke (11) via a pair of wiring suspensions (5) functioning as cantilevers. The magnetic yoke is provided with a magnet (10) for generating a magnetic field. The lens bobbin is situated such that the drive coils are placed within the magnetic field. The wiring suspensions are formed of flexible printed wiring members and have wiring patterns (2a-2d) and insulating films (1, 3) sandwiching the wiring patterns. The wiring patterns function as springs for substantially supporting the lens bobbin.