Sofa bed with inflatable mattress

A foldable, inflatable sectional mattress and a sofa bed of the type including a fixed frame having a pair of upright side frame members, an upright back frame member extending between and secured to the side frame members, a front board extending between and secured to the side frame members, a foldable sectional sofa frame including inner, intermediate and outer frame sections pivotally connected together for movement between a folded, collapsed position within the fixed frame and an extended, horizontal position extending outwardly from the fixed frame, said foldable sectional mattress comprising:

• an air inflated inner mattress section, an air inflated intermediate mattress section, and an air inflated outer mattress section, said inner mattress section having a length dimension greater than the combined length dimensions of said intermediate and said outer mattress sections, said outer mattress section having a length dimension greater than said intermediate section, each section having a cover, an upper slide fastener and a lower slide fastener releasably interconnecting the cover of the inner mattress section with the cover of the intermediate mattress section to dispose the sections in end-to-end relation,
• an upper slide fastener and a lower slide fastener releasably securing the cover of the intermediate mattress section with the cover of the outer mattress section to dispose said sections in end-to-end relation, said mattress being foldable to a collapsed position when one of said slide fasteners between said inner section and said intermediate section is unfastened, whereby the other slide fastener between the inner mattress section and the intermediate mattress section functions as a hinge to permit swinging movement between the inner section relative to the intermediate and outer sections to a folded position, said inner section overlying said intermediate and outer sections when in the folded position and defining a seat for the fixed frame of the sofa bed, said intermediate section when in the folded position being positioned rearwardly of the outer section and below the rear end portion of the inner section, said sectional mattress being folded and unfolded independently of the folding and unfolding of the foldable sofa frame.