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    • 10. 发明授权
    • Optical pickup
    • 光学拾音
    • US06463019B2
    • 2002-10-08
    • US09905870
    • 2001-07-17
    • Noriyuki KawanoKouichi OguraYoshio SaitoMitsuru KinouchiNobuo UekusaHiroyuki Matsuura
    • Noriyuki KawanoKouichi OguraYoshio SaitoMitsuru KinouchiNobuo UekusaHiroyuki Matsuura
    • G11B700
    • G11B17/04G11B7/082G11B7/093G11B7/0932G11B7/0933G11B7/0935G11B7/0956G11B7/22
    • An optical pickup comprises an objective-lens driving device including a movable section provided with an objective lens, a focusing coil, and tracking coils, and a fixed section provided with a single magnetic circuit having a magnetic gap, the focusing coil and the tracking coils being disposed in the magnetic gap. The point of application of a tracking-driving force, the point of application of a result force of focusing-driving forces occurring in and outside the magnetic gap, and the position of the center of gravity of the movable section are made to substantially coincide with each other. In addition, the objective lens and the magnetic circuit are disposed within an area of a window in a lower shell of a optical disk. Further, a through hole for accommodating a lower portion of a yoke of the magnetic circuit is provided in a mounting base on which the objective-lens driving device is mounted. An inclining fulcrum and a height adjusting means for inclining the objective-lens driving device about the inclining fulcrum are provided in the vicinities of the through hole.
    • 光拾取器包括物镜驱动装置,该物镜驱动装置包括设置有物镜的可移动部分,聚焦线圈和跟踪线圈,以及设置有具有磁隙的单个磁路的固定部分,聚焦线圈和跟踪线圈 设置在磁隙中。 跟踪驱动力的应用点,发生在磁隙内外的聚焦驱动力的结果力的施加点和可移动部分的重心位置基本上与 彼此。 此外,物镜和磁路设置在光盘的下壳体内的窗口的区域内。 此外,用于容纳磁路的磁轭的下部的通孔设置在安装有物镜驱动装置的安装基座中。 在通孔附近设置倾斜支点和用于使物镜驱动装置围绕倾斜支点倾斜的高度调节装置。