| 摘要 |
A joint assembly for a playpen includes a base, two support rods each having an end portion pivotally mounted on the base, and a control device mounted on the base and detachably locked on the two support rods to lock the two support rods on the base and unlock the two support rods from the base. Thus, the playpen can be expanded and folded easily and conveniently by operation of the joint assembly, thereby facilitating a user expanding and folding the playpen.
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