Patent ID: 8042130

Claim:
An optical driving device, comprising: a holder for holding a plurality of optical units each of which focuses on an optical disk a light beam outputted from a light source, focusing coils, and tracking coils; a plurality of elastic support members for supporting said holder so as to be movable in an approximately radial direction of the optical disk and in an approximately perpendicular direction to the optical disk; a first magnet and a second magnet disposed so that the same poles thereof are opposing each other for generating magnetic fields with respect to the focusing coils and to the tracking coils; and a base yoke having a first fixing plate portion and a second fixing plate portion holding said first magnet and said second magnet respectively, and inner yoke portions each provided with a slit at the center thereof; wherein upon said base yoke, the inner yoke portions are placed collinearly with the first fixing plate portion and the second fixing plate portion, and are placed in an intermediary position between the first fixing plate portion and the second fixing plate portion; the top face of said holder has a closed structure, and a surrounding wall portion is formed on a lateral side of said holder; and each of the inner yoke portions is introduced inside the top face of said holder and the surrounding wall portion.