How does a seatbelt work ?

How a Seatbelt works

Did you know that when you are in an auto accident, there is a 1 in 84 chance you may die? However, that number is lowered by 50% with just the use of a seat belt. With those kind of numbers, you want to make sure you are always using your seat belt when driving or riding in a vehicle. You should always use a seat belt but how does a seat belt work?


Here is a basic break down. The seat best system is consisted of webbing that is connected to a retractor mechanism. A spool is attached to one of the ends of the webbing as well, being the main element in the retractor. Inside the retractor is a spring that applies torque to the spool causing it to rotate. This winds up any loose webbing that may remain.


A locking mechanism exists in the spool to stop it from rotating. This can be triggered by the vehicles movement. The spool gets locked when the vehicle decelerates very quickly such as in the event of a collision. A jerking motion on the seat belt webbing can also trigger the retractor.


A pretensioner does the job of tightening the seat belt webbing in some newer systems. However, the pretensioner works together with the regular locking mechanisms, rather than in place of them. Unlike the usual locking mechanism that keeps the belt from extending any further than it was before a collision, a pretensioner actually tightens any and all slack. This helps put the individual firmly in their seat when an accident occurs, minimizing damage.


So how does a seat belt work? Simply put, it senses a collision, tightens at that moment, minimizing your movement during the accident. Seat belts are a very important component in any vehicle. If your seat belt is in need of repair or replacement, visit SafetyRestore.com : a professional seat belt repair company. They will help you stay safe on the road.