Browse Prior Art Database

2-Piece Friction Hinge/ Tilt Mechanism Using Axial Springs

IP.com Disclosure Number: IPCOM000122746D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 42K

Publishing Venue

IBM

Related People

Rudisill, CA: AUTHOR

Abstract

Disclosed is a friction hinge/tilt mechanism for use in portable computers and other devices with tilting displays (see figure).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

2-Piece Friction Hinge/ Tilt Mechanism Using Axial Springs

      Disclosed is a friction hinge/tilt mechanism for use in
portable computers and other devices with tilting displays (see
figure).

      The hinge design consists of an inner tube or solid shaft (1),
and an outer tube (2); one of these parts is fixed and the other is
free to rotate.  Integral axial springs (3) are formed in one or both
tubes by slitting the tube axially into two or more segments.  The
springs and/or mating shaft are fabricated such that when the inner
and outer tubes are assembled, the springs are deflected a
pre-determined amount.  Frictional force is produced between the
movable and stationary shafts, with a magnitude depending on the
spring force and co-efficient of friction between the materials; this
frictional force translates to a resisting torque to hold the display
upright.

      Various retaining features (4), (5) to prevent axial movement
of the shaft, to retain the hinge assembly, and attach parts to the
movable shaft may be integrated into the assembly.  Size of the hinge
and details of the design may be varied depending on the application.
Resisting torque is controlled by material type, thickness, modulus
of elasticity, tensile strength, co-efficient of friction, beam
geometry, and radius.

      Disclosed anonymously.