Why do seatbelts sometimes lock and get really tight to the point where you cannot move forward

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Why do seatbelts sometimes lock and get really tight to the point where you cannot move forward

In: Engineering

Fairly certain its a safety lock so in the event of a crash, your body doesnt lunge forward

The whole point of a seatbelt is so that you can move around enough while its in place but the event of a crash it locks you in place so you don’t jolt forward and get injured more than you normal would

The seatbelt has to hold you in place when you crash. So that the forces from the crash that toss you forward on impact don’t toss you that far away from the seat.

But at the same time it has to be on a roll so that you can pull it on and off easily when you get in and out of the car.

So. When you yank it real fast, it’ll pull a brake of sorts in the roll. That, you know, can’t really know for sure if you yank it fast because you just crashed or if you are impatient.

It’s one of the things that are tested on your car if the place where you live have those annual or biannual safety checks. The inspector will, literally, pull your seatbelts one by one to ensure that the brakes in the roll engage as they should.

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a lock engages when you decelerate.

also, if you pull the belt all the way out it locks again where it retracts but wont loosen untill it’s been completely retracted. this is for securing baby seats