Structure of a connecting joint of a case

摘要

An improved structure of a connecting joint used for a case. The connecting joint has a substantially right-angled connecting element provided with a plurality of elongated insertion blocks which engage compartments formed in a hollow insertion plate. An expansion block is inserted at one end into a vertical slot formed by the arrangement of a plurality of the elongated insertion blocks, and the other end thereof is inserted into the compartments formed in the hollow insertion plate. The expansion block has a slot therein that engages a wall of the hollow insertion plate.