Patent ID: 6036265
Filing Date: 2000-03-14
Classification: A47C,Y10T

Abstract:
A shape-adjusting mechanism for a backrest adapted to preset a preselected profile, comprising:a pair of supports spaced-apart along a predetermined axis; and,a resilient axial rib having one end fixed to one of the supports and an opposite end fixed to the other of the supports such that the axial rib flexes outwardly in a predetermined direction as the supports are displaced axially towards one another, the axial rib comprising a lengthwise strap and reinforcing flanges bent from opposing sides of the axial rib and oriented transverse to the strap thereby to define lengthwise sections with different bending resistance in the predetermined direction, the lengthwise sections positioned such that the axial rib flexes to the preselected profile in response to relative displacement of the supports;resilient transverse ribs fixed to the axial rib in axially spaced-apart relationship; and,means operable to displace the supports axially relative to one another thereby to flex the axial rib.