The seat belt is the most important safety device in a car. In the event of an accident, it can timely fix people on the seat, place them out due to the inertia of the car at high speeds, and also prevent people from hitting other objects such as the steering wheel. The importance of seat belts is self-evident, however, many drivers and friends always do not like to be "bound" by seat belts. Nowadays, traffic police have strict inspections, and they have various coping strategies, such as seat belt buckles, seat belt clips, and other things. These habits may make you regret them in the future. Today, we will talk about the working principle of seat belts, so that everyone can truly understand and trust them, Truly realize the importance of seat belts.
Be sure to fasten your seat belt
Hyundai Motor Company three-point safety belt was invented by Volvo engineer Nils Berlin in 1959. In terms of structure, a typical three-point safety belt consists of three parts: a webbing, a retractor, and a fixing mechanism. The fixing mechanism includes buckles, locking tabs, fixing pins, and fixing seats. Buckles and locking tabs are devices that fasten and unfasten seat belts.
Three point seat belt diagram
So what is the principle of car seat belts? Why do we slowly stretch the seat belt with almost no resistance, and why can it provide protection under the enormous inertia in a collision? This is related to the retractor we mentioned earlier.
Springs and Retractors
The retractor is connected to the safety belt through an internal winding shaft, and the internal spring provides reverse rotation torque for the winding shaft, which is also the source of resistance for us to gently pull the safety belt. The resistance to locking during a sudden pull comes from the locking mechanism inside the retractor.