| 摘要 |
A control device is provided for folding and expanding a base portion of a playpen which includes four vertical stands respectively mounted on four corners thereof and a base portion mounted on an underside thereof, four foot portions each fixedly mounted on a bottom end of a corresponding one of the vertical stands, four drive posts each having a first end pivotally engaged with a corresponding one of the four foot portions and having a second end pivotally connected to the base portion, and a flexible casing enclosed around a peripheral portion of the playpen and having an underside engaged with the base portion. The control device includes four block members each fixed on the base portion and pivotally engaged with the second end of a corresponding one of the drive posts, two transmission assemblies each mounted between two of the four drive posts and opposite to each other, each of the transmission assemblies including a bracket member mounted in a mediate portion of the transmission assembly, and a pair of linking rods each having a first end pivotally engaged with a corresponding one of the foot portions and having a second end pivotally engaged with the bracket member, four fastener members each mounted on the first end of a corresponding one of the linking rods and each pivotally engaged with the first end of a corresponding one of the drive posts.
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