Laufstall-Rahmenkonstruktion

摘要

A playpen frame structure comprises a rectangular top rail frame supported by four upright primary legs. The top rail frame comprises four rails, each constituted by two bar members pivotally connected to a mid-joint which allows the bar members to be rotatable about pivots mounted on the mid-joint. A retaining member is provided on each of the mid-joint to form a releasable retaining engagement with the two bar members to maintain the bar members in the expanded condition. The retaining member comprises release button for breaking the retaining engagement. There is also provided a reinforcement structure on the lower ends of the primary legs to hold the legs in position and thus avoid accident collapses of the legs. The reinforcement structure comprises four reinforcement bars respectively extending diagonally from the lower ends of the primary legs and pivotally connected to a central joint which is supported on the ground by secondary legs and two secondary reinforcement bars connecting between two adjacent diagonal reinforcement bars to firmly hold the diagonal reinforcement bars in position.