Patent ID: 7540563

Claim:
A seat comprising a seat part and a backrest attached to a rear side of said seat part, said seat part comprising: a pair of side supporting frame members connected with each other by transverse reinforcing members; and a seat cushion attached to said supporting frame members, said backrest comprising: an inverse U-shaped back frame, lower ends thereof being connected to rear ends of said side supporting frame members, respectively and a backrest cushion attached to said inverse U-shaped back frame, said inverse U-shaped back frame comprising: side supporting parts that are positioned in parallel, and a top supporting part that connects top ends of said side supporting parts, said lower ends of said side supporting parts being connected to said rear ends of said side supporting frame members via lower attaching parts, respectively, said side supporting parts having upper attaching parts proximate to said top ends; and upright supporting members having bottom ends that connect to said lower attaching parts frontward from said lower ends of said side supporting parts, respectively, and upright supporting members having upper ends that connect to said upper attaching parts, respectively.