Patent ID: 8091967

Claim:
A seat rest frame of a motor vehicle seat, the seat rest frame comprising a spindle drive for a lumbar support in a backrest of the motor vehicle seat having a rest frame forming a supporting structure of the backrest, the lumbar support arranged at a front side of the rest frame for supporting a back region of a motor vehicle occupant, wherein the lumbar support has a carrier and a supporting device hinged to the carrier and being adjustable perpendicular to the carrier, the supporting device comprising two supporting bails extending perpendicular to a longitudinal direction of the backrest, wherein the supporting bails are pivotably hinged to the carrier about an axis extending in a longitudinal direction of the rest frame, the spindle drive comprising: a spindle having two thread sections of opposite thread pitch; two gliders guided on the carrier, wherein each of the gliders is connected to a spindle nut having a thread engaging an associated one of the thread sections such that the gliders are movable in opposite directions and pivot the supporting bails toward and away from the carrier; and wherein at least one of the spindle nuts merely partly encompasses the spindle and is configured to be clipped onto its associated thread section of the spindle.