| 摘要 |
<p>It is aimed to provide an objective lens supporting device having its tracking sensitivity in the focusing direction improved by separating the center of gravity of the moving portion for objective lens at the time when it moves in the tracking direction and the center of gravity of the moving portion for objective lens at the time when it moves in the focusing direction from each other and having vibration of the objective lens occurring when the device is subjected to an external force due to an acceleration accompanying a movement of the optical pickup suppressed, the objecting lens supporting device, further, being quite excellent in the optical disk tracking characteristic of the optical pickup device and capable of achieving cueing of an information signal on an optical disk in a very short time. The object of the invention is achieved by a structure comprising a lens retaining member for retaining an objective lens, support means for supporting the lens retaining member for movement along the optical axis of the objective lens, and a supporting base supporting the support means, supported on a bed plate by means of a hinge portion, and allowing the lens retaining member to move in the tracking direction, and having the center of gravity of the entire body of the moving portion supported by means of the hinge portion positioned on the axial line of the hinge portion and the center of gravity of the lens retaining member positioned on the optical axis of the objective lens. <IMAGE></p> |
