| 摘要 |
A lower frame structure of a foldable playyard comprises a hub being operable to lock the lower frame structure at an erected state and to unlock the lower frame structure to allow it to collapse to a collapsed state; four hub legs, one end portion of each of the hub legs being pivotally coupled to the hub such that the hub legs is capable of pivotal in a longitudinal direction of the hub between a erected position and a collapsed position; and a first L-shaped auxiliary supporting tube pivotally coupled to a first hub leg at a coupling end thereof and a second auxiliary supporting tube pivotally coupled to a third hub leg at a coupling end thereof and arranged such that the auxiliary supporting tubes may pivot in a direction parallel to the axial direction of the hub leg, whereby as the lower frame structure is extended to an erected state the hub legs and the first and second auxiliary supporting tubes form a substantially horizontal co-planar spread-out configuration with a leg portion of each of the auxiliary supporting tubes standing on the floor, and as the lower frame structure is collapsed to a collapsed state the hub legs and the auxiliary supporting tubes being substantially parallel with each other.
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