Patent ID: 7828387

Claim:
A seat back structure of an upside-recessed-and-headrest-storage type of seat which includes: a seat back having a backward side facing backwardly of the seat; a headrest storage recession defined in a top portion of said seat back, said headrest storage recession being adapted for receiving and accommodating a headrest therein; and a back board formed from a rigid material which is provided on a backward side of said seat back, said back board including an extension which is adapted to extend upwardly from a lower wall of the back board to occupy a backward side of said headrest storage recession, so that said headrest storage recession defines a three-dimensional space that opens forwardly and upwardly of said top portion of said seat back and is closed by said extension at a backward side thereof which faces backwardly of said top portion of said seat back, wherein said extension has: a forward side facing forwardly of said seat back; and a top end, said seat back structure comprising: a first sheet of covering material which basically covers a whole of said seat back, excepting a portion of said backward side of said seat back; a cover element; and a hinge portion defined between said cover element and said top end of said extension; wherein said cover element is integrally and continuously connected, via said hinge portion, with said top end of said extension, and wherein said cover element is folded relative to said hinge portion and attached to said forward side of said extension of said back board, whereupon both said cover element and said extension cooperate with each other to constitute a rigid backward wall at said backward side of said headrest storage recession.