SEAT BACKS FOR VEHICULAR SEATS

摘要

A seat back for a vehicular seat has a plate member for supporting a back of a pad and an elastic support mechanism for elastically holding the plate member for moving the plate member in a forward and backward with respect to a seat back frame. The plate member includes a first plate portion, a second plate portion positioned on the lower side of the first plate portion, and a third plate portion positioned on the lower side of the second plate portion. The first and third plate portions are more narrow than the second plate portion. The elastic support mechanism includes a rod-shaped elastic bridge member extending horizontally over the seat back frame on the back of the second plate portion. In addition, the elastic bridge member includes a bent portion at the center position as bent along the second plate portion toward the first plate portion.