Browse Prior Art Database

Positive Cover Attachment Method for Hard Disk Drive

IP.com Disclosure Number: IPCOM000101157D
Original Publication Date: 1990-Jul-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Bratvold, DE: AUTHOR [+5]

Abstract

A design of a hard disk file within the industry standard 3-1/2-inch form factor required eight disks to obtain the maximum storage capacity. The eight disks along with spacers nearly used all of the vertical form factor available. This eliminated the space required for a standard type of fastening method for the cover so tape was used since it requires very little space. However, it was felt that tape did not obtain a completely positive attachment that would withstand time and temperature cycles without some slight movement. Any movement of the cover could possibly cause interference with the disks since there is very little clearance between the two parts. Therefore, a design was incorporated into the cover that allows a positive attachment of the cover to the rest of the file without using any additional space.

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This is the abbreviated version, containing approximately 97% of the total text.

Positive Cover Attachment Method for Hard Disk Drive

       A design of a hard disk file within the industry standard
3-1/2-inch form factor required eight disks to obtain the maximum
storage capacity.  The eight disks along with spacers nearly used all
of the vertical form factor available.  This eliminated the space
required for a standard type of fastening method for the cover so
tape was used since it requires very little space.  However, it was
felt that tape did not obtain a completely positive attachment that
would withstand time and temperature cycles without some slight
movement.  Any movement of the cover could possibly cause
interference with the disks since there is very little clearance
between the two parts.  Therefore, a design was incorporated into the
cover that allows a positive attachment of the cover to the rest of
the file without using any additional space.

      Fig. 1 shows the base 2 of the disk enclosure prior to
attaching the cover 4.  Since the cover 4 is of a deep drawn design,
and this process requires a trimming operation after drawing, it is
possible to obtain a feature in the cover that will allow forming
over a "Finger" 8 around the head of the spindle screw 6.  Once the
cover 4 is in place over the spindle screw 6 (see Fig. 2), finger 8
can be formed in such a manner that the cover 4 will be securely
attached to the base 2.  The advantage of this invention is that it
gives positive attachment of the cover 4 without adding...