Patent ID: 7959232

Claim:
A seat frame structure comprising: a seat cushion frame comprising a sheet of material forming a panel portion, a first beam portion, and a second beam portion, the first beam portion having an internal space in at least one of a left/right side edge portion of the sheet of material and the second beam portion having an internal space and forming a rear edge of the sheet of material; a seat back frame comprising a third beam portion having an internal space in at least one of a left/right side edge portion; and a connecting bracket comprising a first arm portion inserted into the internal space of the first beam portion and connected to the first beam portion, a second arm portion inserted into the internal space of the second beam portion and connected to the second beam portion, and a third arm portion inserted in the internal space of the third beam portion and connected to the third beam portion; wherein the connecting bracket connects the seat cushion frame to the seat back frame, wherein the first arm portion, the second arm portion, and the third arm portion are substantially perpendicular to each other, and wherein the first beam portion comprises a first folded portion of the sheet of material formed on a peripheral side edge portion of the panel portion, the second beam portion comprises a second folded portion of the sheet of material, the folded portions being formed in pipe shapes with the internal spaces therein.