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    • 4. 发明授权
    • Electromagnetic lens actuator for optical disk drive
    • 用于光盘驱动器的电磁镜头致动器
    • US5442606A
    • 1995-08-15
    • US259275
    • 1994-06-13
    • Martin McCaslinBrad Johnson
    • Martin McCaslinBrad Johnson
    • G11B7/09G11B7/12
    • G11B7/0933G11B7/093G11B7/0935
    • An apparatus for the dynamic positioning of an objective lens in an optical disk drive comprises a housing, a lens unit movable in a focusing and a tracking direction, a magnetic circuit mounted to the lens unit for creating a first magnetic field, a pair of current conducting coils mounted to the housing and arranged orthogonal to the first magnetic field, and a flexure for flexibly supporting the lens unit in the housing. An active region comprising at least half of the coil creates the second magnetic field in response to current passing therethrough to interact with the first magnetic field and apply a force to the lens unit. This efficient coil arrangement allows for a small, lightweight dual-purpose magnetic circuit which substantially reduces the weight of the lens positioning apparatus. The housing is a one-piece injection molded ceramic component which maximizes stiffness and minimizes weight to improve the performance of the apparatus.
    • 用于物镜在光盘驱动器中的动态定位的装置包括壳体,可在聚焦和跟踪方向上移动的透镜单元,安装到透镜单元上以产生第一磁场的磁路,一对电流 安装到壳体并且布置成与第一磁场正交的导电线圈以及用于在壳体中灵活地支撑透镜单元的挠曲件。 包括线圈的至少一半的有源区域响应于电流通过其而产生第二磁场,以与第一磁场相互作用并向透镜单元施加力。 这种有效的线圈装置允许小型,轻量级的双用途磁路,其大大降低了透镜定位装置的重量。 外壳是一体式注塑陶瓷部件,其使刚度最大化并使重量最小化以提高装置的性能。