Patent attributes
These objects and others are attained by the present invention which provides a collapsible multifunction apparatus, comprising upper and lower sections with a front frame and rear prop legs, where the front frame is pivotably attached by hinges to both sides of the front portions of the upper and lower sections, and the rear prop legs are pivotably attached by hinges to both sides of the rear portions of the upper and lower sections. The hinge positions on both the left and right sides of the collapsible apparatus define (preferably symmetric) foldable left and right side quadrilaterals in which, in each left and right side fully opened quadrilateral, no two lengths are equilateral and no two lengths are parallel, and which collapse to form a substantially flat configuration for storage with nested front frame and rear prop legs. These desirable features, and others, are preferably enhanced by providing a further novel geometry in which, in the fully opened quadrilateral, the upper and lower hinge points of the front frame define a line A-B, the upper and lower hinge points of the rear prop leg are both lower than the upper and lower hinge points of the front frame, respectively, and the upper hinge point of the rear prop leg is closer to line A-B than the lower hinge point of the rear prop leg.
