Patent ID: 7203137

Claim:
An optical pickup unit comprising: an objective lens which faces a data-recording surface of an optical recording medium; a movable lens holder for supporting the objective lens; a tiltable suspension holder disposed distant from the lens holder; a support element which extends between the lens holder and the suspension holder and supports the lens holder such that the lens holder can be moved in a focusing direction and a tracking direction, the focusing direction being aligned with an optical axis of the objective lens and being perpendicular to the data-recording surface of the optical disc, the tracking direction being the radial direction of the optical recording medium; a focusing-driving element for driving the lens holder in the focusing direction; a tracking-driving element for driving the lens holder in the tracking direction; a base on which the lens holder and the suspension holder are disposed; a knife-edged support mechanism which supports the suspension holder such that the suspension holder can be tilted on the base in a tilting direction, the suspension holder being tiltable about an axis line perpendicular to both the focusing direction and the tracking direction; and a tilt-driving element for driving the lens holder and the suspension holder in the tilting direction with respect to the axis line, wherein the optical pickup unit emits a light beam toward the data-recording surface of the optical recording medium via the objective lens so as to record data on the data-recording surface or to playback data based on the light beam reflected from the data-recording surface.