Seat rail module for a vehicle seat for vehicle seat deceleration in the event of a crash

A seat rail module for a vehicle seat, comprising two longitudinal adjustment rails (10) arranged parallel to each other for guiding the vehicle seat (1) and adjusting its position in longitudinal direction, deformation units (18) which can be fastened or are fastened to the longitudinal adjustment rails (10), and fastening members (25) for fastening the seat rail module to the floor of a vehicle body, wherein the vehicle seat (1) can be fastened to the longitudinal adjustment rails (10) and the deformation units (18) are configured for deforming deformation members (19) when the vehicle seat is displaced in a main direction of travel, in order to decelerate the vehicle seat in the event of a crash, characterized in that the fastening members (25) are configured to fasten the seat rail module to the floor of the vehicle body by means of locking, and in that the fastening members (25) are mechanically unlocked when the vehicle seat (1) is displaced in longitudinal direction in the direction opposite to the main direction of travel beyond a predetermined limit line (8).Also in the rear area in which the vehicle seat assumes a seat position which is shifted relatively far backward, such as will be possible in the future for 'autonomous driving' or as a relax position, precautions for occupant protection are provided to a sufficient extent, even if front occupant protection systems, in particular front airbags, are no longer effective in this area.