Patent ID: 7950737

Claim:
A vehicle seat, comprising a seat back having a seat back frame and an active headrest system, the active headrest system comprising: an upper mechanism which is supported in movable manner by the seat back frame and includes a headrest and a first impact body, the upper mechanism being actuatable to move in response to an impact force applied to the first impact body to move the headrest toward an occupant of the seat; a lower mechanism operatively connected to the upper mechanism, the lower mechanism being actuatable to move in response to an impact force applied to it, to interact with the upper mechanism in order to move the headrest toward the occupant of the seat; a guide means to support in guided manner the lower mechanism relative to the seat back frame, so that during use the lower mechanism is displaced with respect to the frame in a predetermined direction, in response to an impact force applied to the lower mechanism, so as to move the headrest toward the occupant of the seat; the lower mechanism including a lumbar support device which includes a lumbar support element having an intermediate part and two lateral parts, in which each lateral part is configured to be hinged to a support structure of the lumbar support element; each lateral part is connected to the intermediate part by a respective flexible part with longitudinal flexibility for shortening or lengthening in a side-to-side lateral direction with respect to the seat; and the lumbar support device further includes an interconnection of the two lateral parts, to maintain in a respective operating position the lumbar support element.