Abstract: A joint joins together two tubular rails of a playpen. The joint includes a shell. A first block and a second block are pivotally received in the shell. A first tubular element and a second tubular element are each secured in one of the tubular rails. Each of the tubular element defines a first axial passage and a second axial passage. A first bolt with a head is inserted through the second axial passage defined in the first tubular element while the head thereof is retained in the first axial passage defined in the first tubular element. The first bolt is secured to the first block. A second bolt with a head is inserted through the second axial passage defined in the second tubular element while the head thereof is retained in the first axial passage defined in the second tubular element. The second bolt is secured to the second block. The first block defines a longitudinal recess and a longitudinal slot in communication with the longitudinal recess defined therein.

Abstract: A folding joint for a foldable playyard having a base frame having two connecting members pivotably secured at the inside for holding two rails permitting them to be held in a longitudinally aligned position or folded up into a collapsed position. The connecting members each have an axial hole at one end for inserting either rail, two through holes on two opposite side walls thereof, and a track connected between the two through holes. The rails each have a pivot hole secured between the two through holes by a headed pin. The two rails are held in the longitudinally aligned position when the head of the headed pin is engaged in one through hole; and the two rails are allowed to be folded up when the head of the headed pin is rotated to the other through hole.