Patent ID: 7204552
Filing Date: 2007-04-17
Classification: B60N

Abstract:
1. In combination with a seat back of automotive seat and a headrest movably provided on said seat back, a device for protecting a cervical spine of a seat occupant comprising: A headrest stay element connected to said headrest, said headrest stay element being movable in a direction forwardly and backwardly of said seat back; A lever element having a first end portion connected with said headrest stay element and a second end portion having an outer annular cross section, said lever element being disposed in said seat back and movable in the direction forwardly and backwardly of the seat back together with the headrest stay element; a sinuous return spring element resiliently extended in said seat back, said sinuous return spring element having a width to provide a plane for supporting a back portion of said seat occupant; and an elastic pressure receiver element adapted to receive a pressure applied from a seat occupant in case of a rear-end or backward collision, said elastic pressure receiver element comprising: a cross plate region; and a first engagement portion having an annular inner cross section rotatably engaged to said annular outer cross section of second end portion of said lever element; and a second engagement portion engaged to a part of said sinuous return spring element; wherein both said part of said sinuous return spring element and said pressure receiver element rotate together around said second end portion of said lever element when a pressure is applied from the seat occupant during a rear-end or backward collision.