Patent ID: 8007091

Claim:
An ink supply device comprising: an ink cartridge including: an ink chamber for storing ink; a port which is provided in a rear surface thereof at a lower portion of the ink chamber in a gravity direction and which allows ink to flow from the ink chamber to outside in an ink flow direction; and an engaged portion which is provided on an upper surface thereof; a cartridge mounting portion into which the ink cartridge is insertable in an insertion direction from the rear surface of the ink cartridge, wherein the cartridge mounting portion is configured to accommodate the ink cartridge movably between a first posture in which the ink flow direction of the port is aligned with the insertion direction and a second posture in which the ink cartridge is inclined so that a downstream of the port in the ink flow direction is lower than an upstream of the port; a joint which is provided in the cartridge mounting portion and is connected to the port of the ink cartridge inserted into the cartridge mounting portion; a first elastic member which urges the ink cartridge inserted into the cartridge mounting portion to a removal direction opposite to the insertion direction; and a lock member which is engaged with the engaged portion of the ink cartridge inserted into the cartridge mounting portion to prevent the ink cartridge from being moved in the removal direction by the urging force of the first elastic member.