公开(公告)号：US06477017B2

公开(公告)日：2002-11-05

申请号：US09245037

申请日：1999-02-05

Applicant: Toru Kohei ,  Yasumasa Kuroba

Inventor： Toru Kohei ,  Yasumasa Kuroba

IPC: G11B2116

CPC classification number: G11B5/4813 ,  G11B5/488

Abstract: Each arm module includes plate-shaped arms which lie on top of each other. A head slider is supported by the extending end of each arm module and faces a data recording surface of a magnetic disk. An actuator drives each arm module. Each arm module has a structure in which the plate-shaped arms which lie on top of each other are integrated with each other.

Abstract translation: 每个臂模块包括位于彼此顶部的板状臂。 磁头滑动器由每个臂模块的延伸端支撑并且面对磁盘的数据记录表面。 执行器驱动每个臂模块。 每个臂模块具有这样的结构，其中位于彼此顶部的板状臂彼此一体化。

公开(公告)号：US06327120B1

公开(公告)日：2001-12-04

申请号：US09057174

申请日：1998-04-08

Applicant: Shinji Koganezawa ,  Toru Kohei ,  Tomoyoshi Yamada ,  Yukihiro Uematsu ,  Tadayoshi Noguchi ,  Hisashi Nakano ,  Ryuma Sakamoto ,  Junichi Inoue ,  Tetsuya Suzuki

Inventor： Shinji Koganezawa ,  Toru Kohei ,  Tomoyoshi Yamada ,  Yukihiro Uematsu ,  Tadayoshi Noguchi ,  Hisashi Nakano ,  Ryuma Sakamoto ,  Junichi Inoue ,  Tetsuya Suzuki

IPC: G11B2110

CPC classification number: G11B21/106 ,  G11B5/5552 ,  H01L41/0993

Abstract: An actuator having a simple configuration requiring no high dimensional accuracy, high in positioning accuracy and low in cost, and a head-positioning mechanism using the actuator are disclosed. An actuator according to a first application comprises a shear-type piezoelectric element of predetermined thickness and an opposed electrode formed on two electrodes in spaced relationship on a base member. The opposed electrode is displaced in accordance with the direction of polarization of the shear-type piezoelectric element upon applying a voltage between the two electrodes. The opposed electrode thus constitutes an operating section of the actuator. An actuator according to a second application comprises a movable member arranged on a drive member including a shear-type piezoelectric element on a base member. The drive member includes a plurality of layers of piezoelectric elements polarized in alternately opposite directions perpendicular to the thickness of the devices. A plurality of conductive layers are formed adjacently to the respective layers of the devices to permit voltage application thereto. The movable member can be driven in parallel to the base member upon application of a voltage between the conductive layers. Any one of these actuators can be incorporated as a part of the head actuator to constitute a head-positioning mechanism capable of displacing the head by a minuscule distance independently of the operation of the head actuator.