Patent ID: 7758172

Claim:
A liquid ejection apparatus comprising: a fluid reservoir which stores a fluid and has a fluid discharging outlet; a fluid ejection head which has a nozzle and ejects a fluid from the nozzle toward a target; a passage forming member which has a passage which leads the fluid to the fluid ejection head from the fluid reservoir and a hollow needle which communicates with the passage and is adapted to be inserted in the fluid discharging outlet; a valve seat provided in the passage; a valve member provided in the passage, wherein the valve member is movable in a first direction of approaching the valve seat and in a second direction of separating from the valve seat so as to close and open the passage, and the valve member having a magnetic body; and a rotation member which is rotatable between a first position and a second position relative to the passage forming member, the rotation member having a magnet, wherein, when the fluid reservoir is in a non-insertion position where the needle is not inserted in the fluid discharging outlet, the rotation member is located in the second position, and, when the fluid reservoir is moved in an insertion position where the needle is inserted in the fluid discharging outlet, the rotation member moves to the first position from the second position, wherein, when the rotation member is located in the first position, an attraction that can move the valve member in the second direction acts between the magnet and the magnetic body, and, when the rotation member is located in the second position, the attraction that can move the valve member does not act between the magnet and the magnetic body; and a restricting member which is moveable between a restriction position and a non-restriction position, wherein, when being located in the restriction position, the restricting member restricts movement of the rotation member so that the rotation member is located in the second position, and, when being located in the non-restriction position, the restricting member does not restrict the movement of the rotation member, and, when the fluid reservoir moves to the insertion position from the non-insertion position, the restricting member is pressed by the fluid reservoir, and is moved to the non-restriction position from the restriction position.