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    • 12. 发明授权
    • Objective lens actuator for enabling to reduce the dynamic tilt between optical disc and objective lens
    • 物镜致动器,用于减轻光盘与物镜之间的动态倾斜
    • US08407730B2
    • 2013-03-26
    • US12632891
    • 2009-12-08
    • Yoshihiro SatoHidenao SaitoSeiichi KatoJun HatoRyuichiro MizunoKatsuhiko Kimura
    • Yoshihiro SatoHidenao SaitoSeiichi KatoJun HatoRyuichiro MizunoKatsuhiko Kimura
    • G11B7/00
    • G11B7/0932G11B7/0933G11B7/22
    • An objective lens actuator 25, for driving an objective lens 1 for focusing lights upon a recoding surface of an optical disc, comprises a moving part 2, which comprises the objective lens 1 and a coil; a magnet, which is fixed on a yoke and drives the moving part 2; a plural number of elastic support parts, each of which supports the moving part 2 at an end thereof; a first fixing portion 5a and a second fixing portion 5b, which fix other ends of the plural number of elastic support parts 4 and are disposed opposite to each other in a focus direction; and a moving mechanism 6, which is provided on the first and second fixing portion 5a and 5b, so that the first and second fixing portions 5a and 5b can move in the focus direction, relatively, and thereby providing the objective lens actuator 25 enabling to reduce the dynamic relative tilt between the optical disc and the objective lens 1 (i.e., reducing the tilt of the objective lens 1 in the tangential direction when operating), as well as, an optical pickup and an optical disc drive.
    • 用于驱动用于将光聚焦在光盘的记录表面上的物镜1的物镜致动器25包括包括物镜1和线圈的移动部分2; 磁体,其固定在磁轭上并驱动移动部件2; 多个弹性支撑部件,每个弹性支撑部件在其一端支撑移动部件2; 第一固定部分5a和第二固定部分5b,其固定多个弹性支撑部分4的另一端,并且在聚焦方向上彼此相对设置; 以及设置在第一和第二固定部分5a和5b上的移动机构6,使得第一和第二固定部分5a和5b可相对于聚焦方向移动,从而使物镜致动器25能够 降低光盘和物镜1之间的动态相对倾斜度(即,当操作时减小物镜1在切线方向上的倾斜度)以及光拾取器和光盘驱动器。