How Car Seat Belts Work

The function of the retractor is to store the webbing and lock the webbing to be pulled out. It is the most complicated mechanical part in the seat belt. There is a ratchet mechanism inside the retractor. Under normal circumstances, the occupant can freely pull the webbing on the seat at a constant speed, but when the continuous pulling process of the webbing from the retractor stops or when the vehicle encounters an emergency, the ratchet mechanism will act. The locking action automatically locks the webbing, preventing the webbing from being pulled out. Mounting fixtures are lugs, inserts and bolts that are connected to the vehicle body or seat components. Their mounting positions and firmness directly affect the protection effect of the seat belt and the comfort of the occupants.