DE1949085

An installation for locking the backrest in seats of vehicles, particularly motor vehicles in which a forward tilting or pivoting of the backrest is prevented during the drive of the vehicle, by a disengagable locking mechanism; the locking mechanism includes clamping means preferably arranged at the inner side of two seat fittings supported at the seat frame which retain the backrest in the driving condition under a spring force in the rearwardly pivoted position whereas upon exceeding the spring force by a load acting on the backrest in the driving direction, a hook-like member supported on a pivot pin fastened at the fitting stops the backrest at a relatively fixed part such as a pin member or the like secured at the seat frame.