Patent ID: 7445282

Claim:
A vehicle seat device comprising: a headrest provided at a vehicle and including a headrest rear portion and a headrest front portion; the headrest rear portion supported at a seat back of the vehicle; the headrest front portion moved between a fully closed position at which the headrest front portion is located closer to the headrest rear portion and a fully opened position at which the headrest front portion is located distanced from the headrest rear portion; a driving portion driving the headrest front portion so as to move between the fully closed position and the fully opened position; an impact detecting portion detecting an impact applied to the vehicle or detecting that an impact will be applied to the vehicle and outputting a detected signal on the basis of the detected result; a control portion controlling the driving portion on the basis of the detected signal outputted by the impact detecting portion so as to move the headrest front portion toward the fully opened position when the impact is applied to the vehicle from the rear thereof or before the impact is applied to the vehicle from the rear thereof, and so as to move the headrest front portion toward the fully closed position after having moved the headrest front portion toward the fully opened position; a memory portion memorizing vehicle information related to traveling of the vehicle; the vehicle information including the detected signal outputted by the impact detecting portion; the memory portion memorizing historical information related to an actuating status of the headrest front portion and an occurrence of an actual vehicle collision in a manner where the control portion controls the memory portion to cumulatively memorize the vehicle information in the memory portion at a predetermined timing.