Patent ID: 7438197

Claim:
A combined module of a large folding container and a small folding container, wherein said large folding container comprises a bottom section, long-side walls hinged to corresponding long-side bank portions of the bottom section, and short-side walls hinged to corresponding short-side bank portions of the bottom section, wherein said long-side walls are configured to be longer than said short-side walls, said long-side bank portions are configured to be higher than said short-side bank portions, a back surface of the bottom section of the large folding container is formed with a bottom fitting portion, and said bottom fitting portion is divided into sub-fitting portions by a groove extending parallel with said short-side bank portions, and said sub-fitting portions are surrounded by a peripheral frame; and said peripheral frame includes a long-side wall portion that is substantially parallel with and spaced apart from each of said long-side bank portions, a short-side wall portion that is substantially parallel with and spaced apart from each of said short-side bank portions of said frame, and four extending portions formed in respective corner areas of said bottom fitting portion and horizontally extending away from said long-side wall portion and said short-side wall portion side of said peripheral frame and towards said corner of said bottom, wherein said extending portions connect each of said long-side wall portions to said short-side wall portions, and a distance between said extending portions and said bank portions of said bottom is less than the distance between said long and short-side wall portions of said peripheral frame and said bank portions of said bottom; and said small folding container comprises a small folding container bottom section, small folding container long-side walls hinged to corresponding small folding container long-side bank portions of the small folding container bottom section, and small folding container short-side walls hinged to corresponding small folding container short-side bank portions of the small folding container bottom section, wherein said small folding container long-side walls are configured to be longer than said small folding container short-side walls, said small folding container long-side bank portions are configured to be higher than said small folding container short-side bank portions, and a small folding container back surface of the small folding container bottom section of the small folding container is formed with a bottom fitting portion, and each of said extending portions of the bottom fitting portion of the large folding container is fitted into a fitting concave portion formed in the respective small folding containers when the large folding container and the small folding containers are assembled into a box shape and stacked on one another.