Abstract: An foldable shelf includes: a foldable support body, where the support body can be switched between a folded state and an unfolded state; several layer plates, where the several layer plates fit with the support body to form a storage space in the unfolded state and reduce a volume of the foldable shelf in the folded state; and a fixing mechanism for securing the layer plates to the support body, where the fixing mechanism includes: a first fastener, where an outer surface of the first fastener is provided with at least one protrusion; and a second fastener, where the second fastener is provided with a groove for accommodating the first fastener; where a side wall of the groove is provided with a through hole matching the protrusion.

Abstract: A diamond-shaped folding rack includes a left side frame, a right side frame, a folding layer plate, a linkage vertical rod, and a locking mechanism. The folding layer plate is axially connected to the left and right side frames. The linkage vertical rod is provided at a folding junction of the folding layer plate. The linkage vertical rod moves up to allow the folding layer plate to fold upward; the linkage vertical rod moves down to allow the folding layer plate to unfold downward and horizontally.

Abstract: A trolley assembled by a snap-fit structure is provided. The trolley comprises a first carrying basket, a second carrying basket, a third carrying basket each having a carrying space, and an assembly support frame arranged at both sides of the first, second and third carrying baskets. The carrying baskets are respectively provided with a snap-fit assembly component for assembling onto or disassembling from the assembly support frame. The assembly support frame is provided with a clamping groove which is matched with corresponding support crossbar for a snap-fit assembly or disassembly. The disclosed trolley has a simple structure but high structural stability and can be assembled arbitrarily in a snap-fit manner and disassembled into different components which then be receipted without tools. Moreover, the disclosed trolley is convenient for packaging, storage and transport, and has strong applicability and reduced usage cost.