Patent ID: 7575300

Claim:
An ink cartridge attachment/detachment device adapted to load an ink cartridge into an apparatus provided with an insertion opening, the device comprising: a cartridge holding unit, holding the ink cartridge inserted into the apparatus from the insertion opening by a first stroke; a lever arm, movable between a reset position at which the lever arm is supposed to be when a loading of the ink cartridge is enabled and a set position at which the lever arm is supposed to be when the loading of the ink cartridge is completed; a power transmitting and converting mechanism, configured to convert a rotation of the lever arm into a movement of a second stroke required for loading the ink cartridge held by the cartridge holding unit; and an ink cartridge erroneous insertion action preventing unit, configured to prevent the ink cartridge from being inserted into the insertion opening when the lever arm is not at the reset position, wherein the ink cartridge erroneous insertion action preventing unit includes a blocking member, configured to be placed in an outside of the insertion opening so as to block the insertion of the ink cartridge into the insertion opening when the lever arm is not at the reset position, and configured to be retracted from the insertion opening when the lever arm is at the reset position.