A seat back hinge mounting has a toothed element firmly connected to the seat back and a detent element associated with the seat carrier. The detent element includes an arcuate region with teeth that are adapted to be brought into engagement with the teeth of the toothed element, a long hole through which the pivot extends making the detent element movable in such a manner that the teeth are movable into and out of engagement with the teeth of the toothed element, and first and second inclined surfaces disposed on the free end turned away from the seat back and disposed diagonally opposite each other and forming a V-like shape that tapers toward the free end of the detent element. The hinge has first and second spring-loaded eccentric discs fastened for rotation about a respective axis of rotation (Y-Y) on the seat carrier.
