公开(公告)号：SG100684A1

公开(公告)日：2003-12-26

申请号：SG200102637

申请日：2001-05-04

Applicant: IBM

Inventor： KOHJI SERIZAWA

IPC: G11B5/024

Abstract: A data eraser applies a strong magnetic field to a magnetic disk while suppressing the strength of a magnetic field applied to a spindle motor. The data eraser includes an upper magnet fixer, a lower magnet fixer, and a linkage. The upper magnet fixer fixes one set of permanent magnets and the lower magnet fixer fixes another set of permanent magnets. The plate members are provided at the tips of the upper and lower magnet fixers. The plate members are made of a soft magnetic material, for example, JIS SS400, respectively. Each of these plate members functions as a yoke.

公开(公告)号：SG92614A1

公开(公告)日：2002-11-19

申请号：SG1998002818

申请日：1998-07-31

Applicant: IBM

Inventor： AKIHIKO AOYAGI ,  DAVID W ALBRECHT ,  KOHJI SERIZAWA ,  YUHJI KOBAYASHI ,  HIROO INOUE

IPC: G11B5/49 ,  G11B5/54 ,  G11B21/12 ,  G11B21/21 ,  G11B21/16

Abstract: The present invention prevents a head/slider assembly fixed on a flexure of a head suspension assembly from having an undesired pitching motion when an unexpected excess shock is applied to a hard disk device when the head suspension is at the best position of the unload ramp. A disk drive device in accordance with the present invention comprises: a rotating data recording disk; a head suspension assembly containing a front portion and a rear portion, with the front portion being provided with a tab; a device coupled to the rear portion of the head suspension assembly to move the front portion between an inner most position and an outer most position along a radial direction of the rotating data recording disk; a ramp element containing a support surface for engaging with the tab of the front portion of the head suspension assembly when the front portion is moved to the outer most position; and a flexure mounted on said front portion of the head suspension assembly, and having a front portion disposed towards the tab of the head suspension assembly and a rear portion disposed towards the rear portion of the head suspension assembly.