Patent ID: 7237838

Claim:
Headrest arrangement for a backrest section ( 10 ) of a motor vehicle seat with a headrest, the headrest arrangement being moveable from a normal seating position ( 68 ) to a crash-active position ( 70 ), the headrest arrangement comprising an activation unit ( 11 ) and a headrest adjustment unit ( 12 ), the activation unit ( 11 ) comprises an activation shield ( 38 ) and an eccentric shaft ( 60 ), the activation shield ( 38 ) has a first and a second end and the eccentric shaft 60 has a first and a second end, the first end of the activation shield and the first end of the eccentric shaft are attached to a first lever end plate, the second end of the activation shield and the second end of the eccentric shaft are attached to a second lever end plate, the head rest adjustment unit ( 12 ) comprises two head rest guides ( 18 ) supported on the eccentric shaft, wherein the activation unit ( 11 ) extends essentially along, and at the same height as a shoulder section of a seated person, and wherein the headrest is moveable from the normal seating position ( 68 ) relative to the backrest section in that the activation shield ( 38 ) is displaced rearwardly in the event of a rear crash, and wherein the rearward displacement of the activation shield ( 38 ) is transferred via the eccentric shaft ( 24 ), causing the head rest guides ( 18 ) to perform a direct rotational and translational motion so as to attain the crash-active operating position ( 70 ).