Patent ID: 7357140

Claim:
A collapsible structure movable between an expanded position to a collapsed position, the collapsible structure comprising: at least two side portions, each side portion including an upper side portion and a lower side portion, each upper side portion including upper side members pivotally connected to each other via a first hinge, each lower side portion including lower side members pivotally connected to each other via a second hinge, the lower side members being pivotally connected to the upper side members via third hinges; at least two upper connecting portions, each upper connecting portion including tipper connecting members pivotally connected to each other via a fourth hinge, the upper connecting portions being pivotally connected to the upper side portions via fifth hinges; at least two lower connecting portions, each lower connecting portion including lower connecting members pivotally connected to each other via a sixth hinge, the lower connecting portions being pivotally connected to the lower side portions via seventh hinges; wherein the side portions, the upper connection portions, and the lower connection portions define a three dimensional enclosure within the structure in the expanded position; and wherein a first folding axis is defined which passes through the third hinges, and a second folding axis is defined which passes through the first and second hinges.