What is the usage standard for seat belt retractors?

[VonHaven]

The standard length of the seat belt retractor in a vehicle is generally around 1 meter. Seat Belt: A seat belt is a safety component used in equipment, such as when riding in aircraft, working at heights, or performing stunts, to ensure safety. The main materials are polyester, polypropylene, and nylon. A seat belt does not only refer to the webbing; besides the webbing, the seat belt is also assembled with other components. Consequences of a Loose Seat Belt: When an accident occurs, the seat belt pretensioner activates as the occupant moves forward and the seat moves backward. If the seat belt is too loose, the likely consequences are: the occupant may slip out from under the seat belt; or, the occupant may already have hit the airbag while the seat belt, due to excessive slack, fails to tighten in time. This means the seat belt does not absorb part of the impact force as intended, instead transferring the entire burden to the airbag.