公开(公告)号：MY115485A

公开(公告)日：2003-06-30

申请号：MYPI9901408

申请日：1999-04-12

Applicant: IBM

Inventor： ALBRECHT THOMAS R ,  HEINO CHARLES H JR ,  WU TSAI-WEI

IPC: G11B5/54 ,  G11B21/12 ,  G11B5/55 ,  G11B21/22 ,  G11B33/14

Abstract: A RAMP STRUCTURE THAT IS DESIGNED TO REDUCE THE AMOUNT OF THERMAL EXPANSION INDUCED MISALIGNMENT (CHANGES IN RAMP-DISK SPACING) BETWEEN LOAD/UNLOAD RAMPS AND DATA STORAGE DISKS OF A DATA STORAGE DEVICE. THE RAMP STRUCTURE HAS A RIGID SUPPORT STRUCTURE AND RAMP UNITS ATTACHED TO THE RIGID SUPPORT STRUCTURE. THE RAMP UNITS ARE MADE OF PLASTIC THAT IS PARTICULARLY SUITED FOR USE AS LOAD/UNLOAD RAMPS.THE RAMPS ARE MACHANICALLY CONNECTED ONLY BY MEANS OF BEING ATTACHED TO THE RIGID SUPPORT STRUCTURE. THE DATA STORAGE DISKS ARE ATTACHED TO A SPINDLE. THE RIGID SUPPORT STRUCTURE IS MADE OF A MATERIAL THAT HAS A THERMAL EXPANSION COEFFICIENT THAT IS EQUAL TO THE THERMAL EXPANSION COEFFICIENT OF THE SPINDLE AND ANY OTHER PARTS TO WHICH THE DISKS ARE ATTACHED. AS A TEMPERATURE CHANGE CAUSES THE SPINDLE TO EXPAND AND THE SPACING BETWEEN DISKS TO CHANGE, THE RIGID SUPPORT STRUCTURE EXPANDS AT THE SAME RATE, THEREBY MAINTAINING ALIGNMENT BETWEEN THE RAMPS AND THE DISKS. PREFEREBLY, EACH RAMP UNIT HAS TWO RAMPS, BUT EACH RAMP UNIT CAN HAVE A SINGLE RAMP.@THE MOST ILLUSTRATIVE DRAWING IS

公开(公告)号：SG91816A1

公开(公告)日：2002-10-15

申请号：SG1999001951

申请日：1999-04-27

Applicant: IBM

Inventor： ALBRECHT THOMAS ROBERT ,  HEINO CHARLES JR ,  WU TSAI-WEI

IPC: G11B21/12 ,  G11B5/54 ,  G11B5/55 ,  G11B21/22

Abstract: A ramp structure that is designed to reduce the amount of thermal expansion induced misalignment (changes in ramp-disk spacing) between load/unload ramps and data storage disks of a data storage device. The ramp structure has a rigid support structure and ramp units attached to the rigid support structure. The ramp units are made of plastic that is particularly suited for use as load/unload ramps. The ramps are mechanically connected only by means of being attached to the rigid support structure. The data storage disks are attached to a spindle. The rigid support structure is made of a material that has a thermal expansion coefficient that is equal to the thermal expansion coefficient of the spindle and any other parts to which the disks are attached. As a temperature change causes the spindle to expand and the spacing between disks to change, the rigid support structure expands at the same rate, thereby maintaining alignment between the ramps and the disks. Preferably, each ramp unit has two ramps, but each ramp unit can have a single ramp.