| 主权项 |
1. A portable articulated support device for supporting objects on the lap of a seated user, comprising:
an articulated quadrilateral frame having four straight sides connected at four corners with opposed sides disposed in parallel spaced relation, said sides formed of elongate thin rectangular panels formed of rigid material; said rectangular panels comprising a first pair of said rectangular panels and a second pair of said rectangular panels, each pair formed of a top panel and a bottom panel, said top panel and said bottom panel superposed and pivotally joined together at first ends by a first pivot pin connector extending therethrough adjacent to said first end to provide relative angular movement therebetween, each said top panel having a second pivot pin connector adjacent to a second end thereof extending from a bottom surface thereof longitudinally spaced from, and axially aligned with said first pivot pin connector, and each said bottom panel having a generally V-shaped aperture extending transversely inwardly from a lateral side thereof adjacent a second end thereof terminating in communication with a central bore longitudinally spaced from, and axially aligned with, said second pivot pin connector to receive and releasably engage said second pivot pin connector in said central bore in a snap fit relation; in an assembled condition, said frame being pivotally movable between an expanded generally rectangular shape and a collapsed generally diamond-shaped rhombus to be supported in a generally horizontal plane upon the lap of the seated user; and said rectangular panels forming flat support surfaces for receiving and supporting objects on the lap of the seated user; and in a detached condition, said top panel and said bottom panel of each of said first pair and said second pair of rectangular panels is pivoted about said first pivot pin connector to assume an overlapped parallel superposed relation for compact storage. |
