Rigid, multipurpose, polyhedric structure which can be folded away on its own base

Claim 1

A polyhedric structure adapted to be folded down onto its own base, said structure comprising: a base consisting of a polygon; a roof consisting iof a polygon, said polygons of the base and the roof having an even number of sides; (n-1) first lateral surfaces, wherein n is the number of sides of the base polygon, said first lateral surfaces joining said roof to said base and forming a prism, each of said first lateral surfaces having a diaginal line; a side surface free on at least three sides and affixable as an nth lateral surface of said prism, said side surface having a tilting door; and a groove extending along the diagonal line of each said first lateral surface, said grooves being inclined in the same direction, said first lateral surfaces having corners, said corners being connected by at last one continuous, flexible layer, the first lateral surfaces contiguous to said side surface being provided with auxiliary folding lines parallel to the base, placed in the middle of said first lateral surfaces and in contact with said diagonal lines.