主权项 |
1. An apparatus, comprised partly of a rectangular platform which may include blocking rails oriented front to back along the platform's underside and located near the left and right edges, where the platform is connected with a horizontally oriented hinge along its rear edge to a horizontal extension of a back portion and the back portion in turn is connected on each side edge to two side portions by hinges oriented vertically along their rear edges, which folds and in so doing causes its side portions to fold inwards and to the rear and the platform to fold down and to the rear so that when closed the apparatus's platform, sides and back exist in parallel planes and in this closed condition the apparatus may or may not have a latching mechanism that connects the front undersurface of the platform to the lower aspects of a side portion or the back portion or both and in so doing, prevents the apparatus from opening.
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