US Patent 9101186 Hard shell luggage case capable of expanding carrying capacity

A hard shell luggage case capable of expanding carrying capacity includes a case body, a cover, a case-opening zipper, an expansion layer and an expansion zipper. A case-opening zipper controls the closing and opening of the case body and the cover. An expansion zipper controls the closing and opening the expansion layer and the case. The expansion layer and the expansion zipper will be invisible and hidden in the case-opening zipper when the luggage case is in an expanded state and the case-opening zipper is closed, which enhances the aesthetic quality of the luggage case. Furthermore, the hard shell luggage case capable of expanding carrying capacity requires less sewing operations, which makes the luggage case easier to manufacture and reduces manufacturing cost.