Collapsible structure

Claim 1

A collapsible enclosure, comprising: two central hub flanges having a plurality of joist holes along the periphery thereof; at least one hub connecting member rigidly but detachably interconnectable between said hub flanges, said hub connecting member defining the width of said enclosure; a plurality of joist members pivotably mountable between said hub flanges by insertion in said joist holes, the plurality of joist members comprising an inner support joist and a first outer support joist; a locking mechanism pivotably connecting said inner support joist and said first outer support joist, said locking mechanism having inner and outer legs pivotal on said inner support joist and said first outer support joist respectively, and a locking flange pivotably connecting said inner leg and said outer leg, said legs being pivotable only in one direction; a spring-like member attachable to and urging together said inner support joist and said first outer support joist; a second outer support joist and at least one additional locking mechanism and spring-like member for connecting the second outer support joist and said inner support joist; a covering skin mountable on said joist members and attached thereto at spaced intervals along said skin; and, a platform having a channel on a lower side thereof, said channel adapted to overfit said at least one hub connecting member interconnecting said two central hubs, whereby said enclosure is secured by the weight of said platform.