| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of print trouble by blocking intrusion of air in an ink lead-out opening into a tube at the time of connecting an ink cartridge. SOLUTION: An ink lead-out opening 50a1 is opened by pressure inserting an ink introduction tube 57 into the plug body 50 of a main tank 9 and pressing a movable body 50b, while furthermore, the plug body 50 and the ink introduction tube 57 are interconnected and the main tank 9 is connected with a cartridge holder 8. In such a connection structure of ink cartridge, a protrusion 57b for pressing the movable body 50b is provided on the pressure inserting side of the ink introduction tube 57 and that protrusion 57b is provided with an air exhaust passage 57c communicating with the inside and outside of the ink lead-out opening 50a1 under a state where air is exhausted by pressure inserting the ink introduction tube 57 into the plug body 50. |
