Ink-jet recording device and ink cartridge

摘要

A recessed portion is formed in an ink cartridge 1 to define a three-dimensional space. Each of axes in the three-dimensional space containing one side surface of the ink cartridge in which an ink supply port 14 is formed is divided into a plurality of sections to obtain a plurality of coordinate points. Identification protruded portions 31-1 to 31-3 which serve as. identification pieces are disposed selectively at the coordinate points in accordance with identification items.