| 摘要 |
An improved foldable base for a playpen includes a first pair of side rails pivotally connected to a first side joint and a second pair of side rails pivotally connected to a second side joint. A pair of T-shaped joints are situated between the pairs of rails. A center joint is located in a center of the playpen and has an outer and an inner joint members pivotally connected with each other. Two pairs of bars are provided, each pair of the bars pivotally connected with one of the respective T-shaped joints and with two of the respective side rails. Two linking rods are also provided, each pivotally connected at an end thereof with one of the respective T-shaped joints and secured at an opposing end thereof to one of the respective joint members of the center joint.
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