DETACHABLE INK JET UNIT AND INK JET APPARATUS

摘要

An ink jet head (100) for ejecting ink, has an ink ejecting portion (101) having an ink ejecting port formed thereon so as to eject ink through the ink ejecting part, a positioning portion (104) for definitely determining the position of the ink jet head (100) relative to an apparatus using the ink jet head (100) when the ink jet head (100) is fitted to the apparatus, an ink supplying portion (102) adapted to be connected to ink supplying unit while ink is supplied to the ink jet head (100), and an electric connecting portion (103) adapted to be electrically connected to an electric connecting portion on the apparatus side so as to send and receive signals, the positioning portion (104), the ink supplying portion (102) and the electric connecting portion (103) axe disposed on a different surface from a surface on which the ink ejecting portion (101) and at least one of the electric portion (103) and the ink supplying portion (102) is disposed on an opposite side surface to a surface on which the positioning portion (104) is disposed.