Patent ID: 8911014

Claim:
A vehicle seat comprising: a seat back frame comprising: side portions located on both sides of the seat back frame; an upper portion disposed in an upper area of the seat back frame; and a lower portion disposed in a lower area of the seat back frame; and a headrest disposed in the upper area of the seat back frame; wherein: the lower portion includes a lower frame extending between the side portions and a neck-burden reduction element; the neck-burden reduction element is anchored to the lower frame, extends in a horizontal direction, and is separated from the side portions by a predetermined distance; the neck-burden reduction element comprises a lower back advancement inhibiting member disposed in a position behind a lower back region of an occupant; the lower back advancement inhibiting member is anchored to an upper end portion and a lower end portion of the lower frame continuously in a right-to-left direction and is disposed to bulge forward further than the lower frame; the lower back advancement inhibiting member is formed as a hollow body provided with openings on both sides in the right-to-left direction; and the neck-burden reduction element, during a rear-end collision, causes a greater amount of backward movement of a connection point between a neck region and a torso region of an occupant than the amount of backward movement of a lower torso region of the occupant, and causes an upper torso region of the occupant to sink into a seat back.