Storage rack with recessed square tubes

Abstract

The invention relates to a storage rack with a concave square tube. This storage rack with a concave square tube comprises multiple posts, multiple storage trays, and multiple layered plates. The posts comprise a concave square tube and multiple convex locking elements. These convex locking elements are arranged at equal intervals on the concave tube, with each convex locking element comprising a locking element body, a convex block, and two mounting notches. The convex block is connected to the locking element body, with mounting notches on both sides of the convex block. The storage trays comprise racks and multiple locking elements. These locking elements are attached to the racks, and the locking elements engage with their respective mounting notches to clamp the storage trays between the posts. Racks are arranged above the respective storage trays.