Patent ID: 8439488

Claim:
An ink supply device comprising: an ink cartridge which includes an ink chamber for storing ink and an engaged portion; a cartridge mounting portion which includes an opening through which the ink cartridge is insertable in a first direction and removable in a second direction and which is configured to accommodate therein the ink cartridge; a first elastic member which urges the ink cartridge accommodated in the cartridge mounting portion to the second direction; and a lock member which is engaged with the engaged portion of the ink cartridge accommodated in the cartridge mounting portion to regulate a movement of the ink cartridge to the second direction; wherein the lock member includes: a lock arm including an operating lever provided at a first end thereof, and a lock portion provided at a second end thereof and being engaged with the engaged portion; a supporting mechanism which movably supports the lock arm between a first posture in which the lock portion is disengaged from the engaged portion and a second posture in which the lock portion is engaged with the engaged portion; and a stopper which is provided in the lock arm and contacts the ink cartridge moved in the second direction by the first elastic member when the lock arm takes the first posture: wherein the lock arm is rotatable about a shaft provided between the first end and the second end to be movable between the first posture and the second posture; and wherein the stopper is provided between the first end and the shaft in the lock arm.