Patent ID: 7641280

Claim:
A method for raising a headrest upon a rear-end collision of a vehicle, comprising the steps of: providing a seat back assembly comprising: a seat back, said seat back including a pressure receiving plate, a headrest ascending mechanism, a force transmitting device, and a headrest, said pressure receiving plate facing toward a back of an occupant and being adapted to move rearwardly upon by an inertia force during the rear-end collision of the vehicle, said headrest ascending mechanism ascendably supporting the headrest at an upper end of the seat back, said force transmitting device operably connecting the pressure receiving plate to the headrest ascending mechanism and being operable to cause the headrest ascending mechanism to raise the headrest when the pressure receiving plate moves to the rear side of the vehicle body; upon experiencing the rear-end collision, moving the pressure receiving plate rearwardly; transmitting said movement of the pressure receiving plate via the force transmitting device, to the headrest ascending mechanism as a tensile load; raising the headrest by directly applying the tensile load in an upward direction on the headrest and thereby pulling the headrest into a raised position wherein the force transmitting device is two Bowden cables, and wherein the Bowden cables extend upwardly from the pressure receiving plate through the seat back, and are then bent at a bend portion to extend downward to be connected to the headrest ascending mechanism, and wherein the two Bowden cables intersect with one another at the bend portion.