Patent ID: 7543892

Claim:
A combination of a seat back of automotive seat and a back board, wherein said seat back has a rear side disposed rearwardly thereof and a pair of lateral sides, and also has a seat back framework and a foam padding, such that said foam padding is disposed at a side of said seat back framework which faces forwardly of the seat back; wherein said back board has: a main wall region having two lateral sides; and a pair of lateral wall regions; wherein said pair of lateral wall regions extend divergent from the respective said two lateral sides of said main wall region so as to extend aslant in a direction outwardly of the latter, thus defining one obtuse-angled corner portion between said main wall region and one of said pair of lateral wall regions and another obtuse-angled corner portion between said main wall region and another of said pair of lateral wall regions; wherein an inward space is defined in said back board by said main wall regions, said pair of lateral wall regions, and said one and another of said pair of lateral wall regions, said inward space being adapted for receiving said rear side of said seat back therein; wherein a first pressure receiving belt element is provided in said one obtuse-angled corner portion to extend rectilinearly between said main wall region and said one of said pair of lateral wall regions, whereas a second pressure receiving belt element is provided in said another obtuse-angled corner portion so as to extend rectilinearly between said main wall region and said another of said pair of lateral wall regions; wherein a first presser element is fixedly provided to said seat back framework in correspondence with said first pressure receiving belt element, whereas a second presser element is fixedly provided to said seat back framework in correspondence with said second pressure receiving belt element, and wherein said back board is securely attached over said rear side of seat back, with said first and second pressure receiving belt elements being pressed and bent forcibly by the respective said first and second presser elements in direction to the respective said one and another obtuse-angled corner portions, thereby causing said pair of lateral wall regions of the back board to bend or curve towards each other, so that the pair of lateral wall regions are resiliently retained in close contact with the respective said pair of lateral sides of said seat back, while said rear side seat back is securely received in said inward space of said back board.