| 摘要 |
PROBLEM TO BE SOLVED: To provide an objective lens drive unit which can reduce tilt generated in focusing operation by increasing a ratio of spring constant of a tangential tilt direction to a spring constant of a focusing direction. SOLUTION: The objective lens drive unit of the optical disk which consists of; an objective lens; a movable part comprising an objective lens holding member which holds the above objective lens; a fixed part arranged at one side in the tangential direction of the above objective lens; and at least four support springs which support the above movable part movably to the above fixed part, has a construction that the above support spring is on the same plane vertical to the focusing direction of the above objective lens and an edge of the support spring by the side of the above movable part seeing from the above focusing direction is connected to the above movable part in the position estranged in the above-tangential direction. COPYRIGHT: (C)2007,JPO&INPIT
|
