Head Rest: Description and Operation

Active Head Restraint
The active head restraint system is designed so that the headrest instantaneously moves towards the front upper direction by utilizing the force at the seatback during a rear-end collision.

As a result, the occupant's head is protected from being overextended, reducing the chance for neck injury as much as possible.

Seat with active head restraint have the labels shown in figures.




OPERATION OUTLINE
When the seatback receives a sharp backward force during a rear-end collision, the input plate moves with the link rotating center as a pivot. The headrest will then move towards the front upper direction with the center of the sliding roller as a pivot.

As the backward force on the seat back is eliminated, spring tension returns the headrest to its original position.