The Mainstream Of Car Seat Belts: Three-point Seat Belts

Jan 16, 2022

The most widely used three-point seat belt is known for its combination of practicality, comfort and effective restraint of the occupant.

This form of harness is called an ELR three-point harness and is equipped with an Emergency Locking Retractor (ELR) retractor.

The ELR retractor allows the seat belt to be pulled out freely and is equipped with an impact sensing device that locks the seat belt in the event of a collision or emergency braking. The device usually senses the impact through the deceleration of the vehicle and the pull -out speed of the webbing, and combining the two methods has become a mainstream method.

The reorganized content is as follows:

The ALR three-point safety belt is a three-point safety belt equipped with an ALR tightener. This type of tightener is called an automatic locking tightener (ALR). In child seat fixation, the combined use of ELR/ALR and ELR has become mainstream. ALR works when the belt is fully extended, while ELR works when the belt is fully retracted.

Seat belt with pretensioner and force limiter

Many mid- to high-end cars are now equipped with seat belts with pretensioners and force limiters. Pretensioners are used to eliminate excessive tension in seat belts as much as possible to prevent occupants from being injured by exploding air bags. The force limiter reduces the tension of the seat belt after the peak force has passed to reduce the pressure on the occupant's ribs and shoulders.