Browse Prior Art Database

Low-Stiffness Magnet-Lock Structure for Shock Resistance Improvement

IP.com Disclosure Number: IPCOM000115478D
Original Publication Date: 1995-May-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Matsuda, H: AUTHOR [+3]

Abstract

Disclosed is a actuator lock structure to improve shock resistance in hard disk drive.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 92% of the total text.

Low-Stiffness Magnet-Lock Structure for Shock Resistance Improvement

      Disclosed is a actuator lock structure to improve shock
resistance in hard disk drive.

      Many kinds of magnet lock are used to hold the actuator at the
contact start/stop zone in the hard disk drive.

      Also, the same type of magnet lock is used with rubber to
reduce the impact acceleration when the actuator hits the lock.

      It means that the actuator lock works as a crash stop too.  But
the feature of this actuator lock structure is that a locking shock
resistance improves without magnet force increase, or data area loss
with keeping a part as a crash stop.

      The merit is that the area influenced magnet force does not
change.  Besides this structure achieves much improvement for short
duration which could be applied in an actual system.

      The components of this actuator lock structure are shown in
Fig. 1.  Stiffness between magnet and fixed part should be as low as
possible.  Fig. 2 shows the top view of this structure.

      When the actuator is locked, the actuator moves to the
direction of "2" and the contact actuator lock.

      In this direction, the actuator is stopped by stopper "E"
accurately, and the stiffness as crash stop is controlled by rubber
thickness, or hardness of the back magnet.

      While on the other hand, as for the direction "1", the actuator
must be held at CSS position by magnet force against large shock.
W...