SRS - Seat Belt Outer Lap TENSIONER (2016 2017 2018 2019 2020 2021 2022)
In the event of a collision, the seat belt outer lap tensioner coordinates with the seat belt tensioner, instantaneously retracts the seat belt, and ensures the seat belt ability to restrain and protect the occupant at the chest and waist by firmly securing the occupant to the seat.
The structure of the seat belt outer lap tensioner is as shown in the figure.
When the seat belt outer lap tensioner operates, a gas generator creates gas pressure which moves a piston within the cylinder that is coupled to a wire. When the piston moves, it pulls the wire, and an anchor is retracted. After the retraction is complete, the anchor and wire are pulled out by the forward movement of the occupant and locks the ball into the cylinder and the wire.