| 摘要 |
An ink cartridge including: an ink chamber storing ink; a communication chamber communicating the ink chamber with the exterior of the ink cartridge; a valve member disposed in the communication chamber such that the valve member is displaceable between a first position to shut off communication between the ink chamber and the exterior, and a second position to permit the communication; a biasing member including a side wall portion surrounding the valve member, and an engaging portion extending inward from an end of the side wall portion and engaging with the valve member, the biasing member normally holding the valve member at the first position but allowing the valve member to be placed at the second position by an elastic deformation of at least one of the side wall portion and the engaging portion, and generating a biasing force to restore the valve member to the first position; and a disengagement preventer which prevents the valve member from disengaging from the engaging portion when the valve member is abnormally operated toward the second position.
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