Under the action of the pressure of the formed gases, the piston of the cylinder is displaced, which moves the toothed rack. This causes the pinion and satellite pinions to rotate. At the same time, the belt is wound onto the reel. Due to the tension of the seat belt in a collision, the risk of serious injuries to those sitting in the front seats as a result of a sharp forward tilt of the body and impact with the steering wheel or dashboard is reduced.
