| 摘要 |
A collapsible playyard for an infant includes a frame subassembly including at least two frame members which are joined together in substantially perpendicular relation. Each of the frame members includes two frame member sections which are joined by a knuckle joint which only permits pivoting between the frame member sections thereof in a single direction. The knuckle joints are oriented so that collapsing one frame member rotates the adjacent frame member causing the knuckle joint thereof to be automatically moved to a collapsible position.
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