| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink cartridge capable of dealing with ink consumption in an ink head by reducing the flow channel resistance of a negative pressure generating means as much as possible. SOLUTION: In the ink cartridge, a negative pressure generating structure 30 which receives the pressure of an ink holding area on one side of it through a flow channel formed in an ink supply flow passage forming member 6 and the pressure of an ink supply port 5 on the other side of it through the flow channel formed in the ink supply flow channel forming component 6 and a valve member 20 which is brought into contact with or separated from a sealing part having a first through hole 10 and which is provided with a second through hole 200 formed in an area facing the first penetrable hole 10. The valve member 20 is moved away from a protruding portion 11 constituting a sealing part in response to pressure at the ink supply port 5 so as to supply ink to the ink supply port 5 through t he first and second holes.
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