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    • 139. 发明授权
    • Dual stage actuator systems for high density hard disk drives using annular rotary piezoelectric actuators
    • 双级致动器系统,用于使用环形旋转压电致动器的高密度硬盘驱动器
    • US06856070B2
    • 2005-02-15
    • US10632638
    • 2003-08-01
    • Zhihong WangTamon KasajimaMasashi ShiraishiPing ShangKai Wu
    • Zhihong WangTamon KasajimaMasashi ShiraishiPing ShangKai Wu
    • G11B5/55G11B21/10G11B21/20H01L41/04H01L41/09H02N2/00H02N2/10
    • G11B5/5552G11B21/106G11B21/20H01L41/096H02N2/10
    • A piezoelectric actuator is disclosed including an annular piezoelectric element and a base. There is a gap along the radial direction of the annular piezoelectric element. One of the two ends, i.e., the fixed end of the said annular element, is connected to the base, while the other end is free. The base is made of piezoelectric materials. Furthermore, the annular element is divided into two or more annular parts along the direction of its circumference by the electrode patterns applied on its two opposite surface and/or its polarization directions. When driving voltages are applied, the actuator can generate roughly a rotary motion around the center of the annular piezoelectric element. The annular rotary actuator could be either a single plate or with multilayer structure. The present invention further relates to a dual stage head positioning actuator system of a hard disk drive with a plurality of disks and a plurality of vertically aligned head sliders mounted on distal ends of a plurality of suspensions via the annular piezoelectric actuators.
    • 公开了一种压电致动器,其包括环形压电元件和基座。 沿着环形压电元件的径向存在间隙。 两个端部中的一个,即所述环形元件的固定端连接到基座,而另一端是自由的。 基座由压电材料制成。 此外,通过施加在其两个相对表面和/或其偏振方向上的电极图案,环形元件沿其圆周方向被分成两个或更多个环形部分。 当施加驱动电压时,致动器可围绕环形压电元件的中心大致产生旋转运动。 环形旋转致动器可以是单板或具有多层结构。 本发明还涉及具有多个盘的硬盘驱动器的双级头定位致动器系统和经由环形压电致动器安装在多个悬架的远端上的多个垂直对准的头滑块。