초록 ▼

A foldable leg assembly includes two upright first legs, two upright second legs, and two upright third legs which are disposed in three rows such that the row of the second legs is disposed intermediate of the rows of the first and third legs. A plurality of pairs of foldable intersecting links int

A foldable leg assembly includes two upright first legs, two upright second legs, and two upright third legs which are disposed in three rows such that the row of the second legs is disposed intermediate of the rows of the first and third legs. A plurality of pairs of foldable intersecting links interconnect the first, second and third legs. In the unfolded state of the leg assembly, a first support rail bridges horizontally and transversely top ends of the first legs, a second support rail bridges horizontally and transversely top ends of the second legs, and a pair of third support rails bridge horizontally and longitudinally top ends of the second legs and top ends of the corresponding third legs. The support rails are turnable pivotally and downwardly relative to top ends of the corresponding one of the first, second and third legs so as to be substantially vertical in the folded state of the leg assembly.

대표청구항 ▼

[ I claim:] [1.] A foldable leg assembly comprising:a pair of upright first legs, a pair of upright second legs, and a pair of upright third legs which are disposed in three rows such that said second legs are arranged in one of said rows intermediate of said rows of said first and third legs;a plur

[ I claim:] [1.] A foldable leg assembly comprising:a pair of upright first legs, a pair of upright second legs, and a pair of upright third legs which are disposed in three rows such that said second legs are arranged in one of said rows intermediate of said rows of said first and third legs;a plurality of pairs of foldable intersecting links which are connected pivotally to each other, said pairs of intersecting links interconnecting said first, second and third legs;a first support rail having one end pivoted to a top end of one of said first legs so as to turn downward substantially vertically in a folded state of the foldable leg assembly, and having another end to extend to a top end of another one of said first legs so as to establish a horizontal bridge between said first legs in an unfolded state of the foldable leg assembly;a second support rail having one end pivoted to a top end of one of said second legs so as to turn downward substantially vertically in the folded state of said foldable leg assembly, and having another end to extend to a top end of another one of said second legs so as to establish a horizontal bridge between said second legs in the unfolded state of the folded leg assembly;a pair of third support rails, each of which has one end pivoted to a top end of a respective one of said third legs so as to turn downward substantially vertically in the folded state of said foldable leg assembly, and another end to extend to a top end of a corresponding one of said second legs so as to establish a horizontal bridge between said corresponding second and third legs in the unfolded state of said foldable leg assembly; anda plurality of sliding blocks slidably disposed on said first, second and third legs, each of said pairs of said intersecting links having a pair of upper connecting ends and a pair of lower connecting ends to connect with two corresponding ones of said first, second and third legs, one of said pairs of said upper and lower connecting ends being prevented from sliding along said two corresponding ones of said first, second and third legs, the other one of said pairs of said upper and lower connecting ends being connected slidably to two corresponding ones of said sliding blocks, each of said second and third legs having a pair of said sliding blocks disposed thereon one above the other, the upper one of said pair of said sliding blocks being pivotally connected to the corresponding one of said upper connecting ends of an adjacent pair of said intersecting links, the lower one of said pair of said sliding blocks being pivotally connected to the corresponding one of said lower connecting ends of another adjacent pair of said intersecting links.