What is the reason why the BMW seat belt cannot be pulled out?
1 Answers
BMW seat belt cannot be pulled out due to damage or jamming inside the seat belt buckle. The function of the car seat belt: When the vehicle collides or uses emergency braking, the pre-tensioning device will instantly tighten the loose seat belt, firmly securing the occupant to the seat to prevent secondary collisions. Once the tightening force of the seat belt exceeds a certain limit, the force-limiting device will appropriately loosen the seat belt to maintain stable chest force. Therefore, the car seat belt plays a role in restraining displacement and cushioning, absorbing impact energy, dissipating inertial force, and avoiding or reducing the degree of injury to the driver and passengers. The working principle of the seat belt: The spiral spring rotates the reel to keep the seat belt tight, and the crumple zone is the relatively easy-to-collapse area at the front and rear of the car. When the car hits an obstacle, it does not stop suddenly, but absorbs part of the impact force through crumpling (like an empty soda can).