Ink jet recording device with detachable ink cartridge and ink cartridge thereof

An ink jet recording device to which an ink cartridge is attached, the ink jet cartridge including an ink reservoir member having an ink reservoir chamber for storing ink and a reservoir chamber side coupling portion for supplying ink stored in said ink reservoir chamber outwards, said ink jet recording device comprising:

• a recording head for discharging ink to a recording medium, and
• a recording head side coupling portion for receiving ink supplied from said reservoir chamber side coupling portion so that ink is supplied to said recording head,
• wherein said recording head side coupling portion comprises
• a member with an ink passage with a means for sealing the ink passage, and
• a valve device for opening and closing said ink passage,
• wherein said valve device begins to open the ink passage during coupling of said reservoir chamber side coupling portion and said recording head side coupling portion, and closes the ink passage after complete detachment of said reservoir chamber side coupling portion and said recording head side coupling portion,
• the means for sealing seals the ink stored in said ink reservoir chamber when not in usage,
• wherein said valve device comprises
• a piercing member inserted into said ink passage from a lower side thereof in a vertical slidable manner for penetrating said sealing member during coupling of said reservoir chamber side coupling portion and said recording head side coupling portion to conduct ink flow from said reservoir chamber side coupling portion, and
• energizing means for energizing said piercing member upwards,
• wherein said piercing member includes means for shutting said ink passage at a highest operating position of the piercing member,
• said recording head side coupling portion further comprises a support unit for receiving said reservoir chamber side coupling portion at completion of coupling with said reservoir chamber side coupling portion,
• wherein said reservoir chamber side coupling portion further comprises
• an abutting portion provided at a position for commencing abutment with a tip end of said piercing member during coupling of said reservoir chamber side coupling portion and said recording head side coupling portion, and
• an elastic sealing member provided at a position to form close contact with said support unit at the completion of coupling of said reservoir chamber side coupling portion and said recording head side coupling portion,
• wherein said piercing member has a tip shape upper end so that, when said piercing member is located at a position shutting said ink passage, its upper end is located higher than a height of said abutting portion of a state where said elastic sealing member forms contact with said support unit.

An ink cartridge attached to an ink jet recording device including a recording head for discharging ink to a recording member, and a recording head side coupling portion receiving ink supply and for supplying ink to said recording head, said ink cartridge comprising:

• an ink reservoir member including an ink reservoir chamber for storing the ink,
• a reservoir chamber side coupling portion for supplying the ink stored and located in said ink reservoir chamber to the outside of the reservoir chamber side portion,
• wherein said reservoir chamber side coupling portion comprises a sealing member in an ink passage for sealing ink stored in said ink reservoir chamber,
• wherein said recording head side coupling portion comprises
• a valve device for opening/closing the ink passage,
• a support unit for receiving said reservoir chamber side coupling portion at completion of coupling with said reservoir chamber side coupling portion,
• wherein said valve device comprises a piercing member, with an end defining a highest position, provided at an edge portion of said valve device at the ink cartridge side in a vertical slidable manner for piercing said sealing member during coupling of said reservoir chamber side coupling portion and said recording head side coupling portion to extract ink from said reservoir chamber side coupling portion,
• wherein said reservoir chamber side coupling portion further comprises
• an elastic sealing member provided at a position to form close contact with said support unit at completion of coupling of said reservoir chamber side coupling portion and said recording head side coupling portion, and
• an abutting portion provided so as to be located, when said elastic sealing member abuts against said support unit, lower than the height of an upper edge portion of said piercing member at its highest position.