Browse Prior Art Database

Floating Subassemblies with Impact Absorbing Foam

IP.com Disclosure Number: IPCOM000113086D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Bratton, WE: AUTHOR [+2]

Abstract

Disclosed is the mounting of several subassemblies within a rigid structure by means of intervening elastomeric foam layers, so that the independent motion of the individual subassemblies is allowed. This method results in the dissipation, through diminishing oscillations, of impact energy caused, for example, by dropping the structure to the floor. While the foam holds the various subassmeblies apart, impact loads are not transmitted from one subassembly to another.

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This is the abbreviated version, containing approximately 75% of the total text.

Floating Subassemblies with Impact Absorbing Foam

      Disclosed is the mounting of several subassemblies within a
rigid structure by means of intervening elastomeric foam layers, so
that the independent motion of the individual subassemblies is
allowed.  This method results in the dissipation, through diminishing
oscillations, of impact energy caused, for example, by dropping the
structure to the floor.  While the foam holds the various
subassmeblies apart, impact loads are not transmitted from one
subassembly to another.

      The Figure shows various subassemblies of a tablet computer in
an exploded relationship, one to another.  The system is layered with
elastomeric foam and is provided with cavities to allow for
oscillation of the subassemblies.  Four main subassemblies are a
planar board 10 with foam on each side, a polycarbonate insulator 12
with a foam layer 14 on an upper side, a Liquid Crystal Display (LCD)
16 with a foam layer 18 extending along its top edges, and a
touch-sensitive screen 20 with a lower lawyer of foam 22 and an upper
layer of foam 24.  The rigid structure enclosing these floating
subassemblies includes a backplate (not shown), extending under
planar board 10, an aluminum bezel 26, a plastic bezel 27, and an
extruded rail.  The rigid structure is preferably surrounded by an
elastomeric bumper, providing external protection.

      In this application, the protection of LCD 16 and
touch-sensitive screen 20 from damage due to m...