Abstract: A seat back framework of one-piece construction together with a head rest support is made from a single blank of fiber-reinforced plastics. The seat back framework comprises a generally rectangular body having opposite upper and lower walls, a pair of opposite side walls and a connecting wall extending between the side walls in spaced relation to the upper wall with a support space defined therebetween. A pair of guide members for axially adjustably supporting corresponding legs forming a part of the head rest assembly together with a head rest are formed on the rectangular body within the support space.

Abstract: A reclining arrangement for a seat or the like including a seat back reclinably mounted to a seat cushion through a reclining knuckle having a rough adjusting mechanism for roughly adjusting, stepwise, the folding angle of said seat back with respect to said seat cushion. The reclining arrangement includes a first arm of the reclining knuckle selectively fixed to either one of the seat back or seat cushion, a second arm of the reclining knuckle pivotally connected to the remaining one of the seat back or seat cushion, and a fine adjusting mechanism so provided as to adjust the angle of rotation of the second arm, the rough adjusting mechanism being disposed to be spaced a predetermined distance from the fine adjusting mechanism.