Patent ID: 6991287

Claim:
A vehicle seat system comprising: a seatback; and a headrest placed at the top of the seatback, the seatback comprising: a seatback frame; a lumbar support that is mounted on the seatback frame for position adjustment in the front and back direction of the seat system and is arranged to disengage from the seatback frame when a specified amount or more of load is applied from front of the seat system to the lumbar support; and an active headrest mechanism that is placed behind the lumbar support as viewed from front of the seat system, connected to the headrest, and moves the headrest to front of the seat system when receiving the load from front of the seat system, wherein the active headrest mechanism has a load-receiving part which is hit by the lumbar support having disengaged from the seatback frame and thereby receives the load applied to the lumbar support.