Abstract: A foldable cart frame has a folding mechanism, a connecting seat, two rear legs, and a handle unit. The folding mechanism has a base seat, at least one guiding rod connected to the base seat, a sliding seat slidably disposed on the at least one guiding rod, and a linkage assembly moveably connected to the sliding seat. The connecting seat is movably disposed on the folding mechanism. The two rear legs are disposed on the base seat. The handle unit is moveably inserted through the base seat, is fixedly connected to the sliding seat, and can drive the sliding seat and the connecting seat to move. The two rear legs are driven by the linkage assembly. The foldable cart frame can be folded and expanded conveniently and quickly. The connecting seat and its connecting components can form a stable supporting structure after expanding.

Abstract: A supporting apparatus for a crib has two legs and a frame. Each leg has a rack. The frame is moveably mounted between the legs and has a body, two moving seats and two adjustment members. The moving seats are mounted on the body, and the legs are inserted into the moving seats respectively. The adjustment members are mounted on the moving seats respectively and engage with the racks of the legs respectively, and each adjustment member is rotatable and moveable upward and downward along a corresponding one of the racks of the legs. The supporting apparatus can be steplessly adjusted to adjust the height of a bed surface of the crib to improve safety.