| 摘要 |
PROBLEM TO BE SOLVED: To provide an objective lens driving device which improves follow-up property of objective lens and reflecting mirror at the time of movement in tracking direction and reduces misalignment of optical axis between the objective lens and the reflecting mirror. SOLUTION: In a pick-up block 1, when a focusing force acts on a focusing leaf spring 3 in a focusing direction, the focusing leaf spring 3 is vertically pulled to flex, thus displacing an objective lens 2 in the focusing direction. When a tracking force acts on the focusing leaf spring 3 and a tracking holding member 6 in a tracking direction, a hinge leaf spring 7 flexes in the tracking direction, thus displacing the objective lens 2 in the tracking direction. When the objective lens 2 is displaced in the tracking direction, a reflecting mirror 9 linked to the tracking holding member 6 through a fixed member 12, a cylindrical elastic member 13 and a shaft 11 is affected by the force in the tracking direction, and parallel leaf springs 10 are thus caused to flex in the tracking direction, thereby displacing the reflecting mirror 9 in the tracking direction. |
