| 摘要 |
A foldable joint of a playpen comprises a U-shaped body having an opening defined in a side face thereof; two linkages respectively pivotally mounted on each end of the body by pivots each having a plug forming a plane on the bottom of the plug provided in the end mounted on the body; and a first spring disposed between the plug and the pivot; a locking means of which the front portion corresponds to the opening, movably mounted in the body by rivets having two wings respectively formed on both sides of the locking means; and a second spring disposed between the back portion of the locking means and the inner wall of the body.
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