Abstract: A liquid cartridge includes: a cartridge casing having a liquid storage chamber; a first wall; a second wall; and an air communication passage. The first wall is positioned upward relative to the liquid storage chamber. The second wall is positioned upward relative to the first wall. The air communication passage has a first communication hole in communication with the liquid storage chamber and a communication opening open to an atmosphere. The air communication passage includes: an air chamber defined by the first wall and the second wall and in communication with the liquid storage chamber through the first communication hole; a second communication hole formed in the second wall; and a labyrinth path. The labyrinth path is positioned upward relative to the air chamber, and has one end in communication with the second communication hole and another end in communication with the communication opening.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction includes: a printing-fluid cartridge and an adaptor to which the cartridge is detachably assembled. The cartridge includes: a casing; a supply portion; a detection portion; and an engagement portion. The adaptor includes: an adaptor body; and an electrical interface. The detection portion includes a light accessible portion accessed by light from an outside of the cartridge. The engagement portion is engageable with the cartridge attachment section. The adaptor body has a front wall at its leading end in the insertion direction. The front wall has an opening through which the supply portion extends. The electrical interface is disposed on an outer surface of the adaptor body and electrically connectable to an electric contact of the cartridge attachment section.

Abstract: A liquid cartridge includes: a cartridge casing having a liquid storage chamber; a first wall; a second wall; and an air communication passage. The first wall is positioned upward relative to the liquid storage chamber. The second wall is positioned upward relative to the first wall. The air communication passage has a first communication hole in communication with the liquid storage chamber and a communication opening open to an atmosphere. The air communication passage includes: an air chamber defined by the first wall and the second wall and in communication with the liquid storage chamber through the first communication hole; a second communication hole formed in the second wall; and a labyrinth path. The labyrinth path is positioned upward relative to the air chamber, and has one end in communication with the second communication hole and another end in communication with the communication opening.

Abstract: A liquid cartridge includes: a cartridge casing having a liquid storage chamber; a first wall; a second wall; and an air communication passage. The first wall is positioned upward relative to the liquid storage chamber. The second wall is positioned upward relative to the first wall. The air communication passage has a first communication hole in communication with the liquid storage chamber and a communication opening open to an atmosphere. The air communication passage includes: an air chamber defined by the first wall and the second wall and in communication with the liquid storage chamber through the first communication hole; a second communication hole formed in the second wall; and a labyrinth path. The labyrinth path is positioned upward relative to the air chamber, and has one end in communication with the second communication hole and another end in communication with the communication opening.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction includes: a printing-fluid cartridge and an adaptor to which the cartridge is detachably assembled. The cartridge includes: a casing; a supply portion; a detection portion; and an engagement portion. The adaptor includes: an adaptor body; and an electrical interface. The detection portion includes a light accessible portion accessed by light from an outside of the cartridge. The engagement portion is engageable with the cartridge attachment section. The adaptor body has a front wall at its leading end in the insertion direction. The front wall has an opening through which the supply portion extends. The electrical interface is disposed on an outer surface of the adaptor body and electrically connectable to an electric contact of the cartridge attachment section.

Abstract: A liquid cartridge includes: a cartridge casing having a liquid storage chamber; a first wall; a second wall; and an air communication passage. The first wall is positioned upward relative to the liquid storage chamber. The second wall is positioned upward relative to the first wall. The air communication passage has a first communication hole in communication with the liquid storage chamber and a communication opening open to an atmosphere. The air communication passage includes: an air chamber defined by the first wall and the second wall and in communication with the liquid storage chamber through the first communication hole; a second communication hole formed in the second wall; and a labyrinth path. The labyrinth path is positioned upward relative to the air chamber, and has one end in communication with the second communication hole and another end in communication with the communication opening.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction includes: a printing-fluid cartridge and an adaptor to which the cartridge is detachably assembled. The cartridge includes: a casing; a supply portion; a detection portion; and an engagement portion. The adaptor includes: an adaptor body; and an electrical interface. The detection portion includes a light accessible portion accessed by light from an outside of the cartridge. The engagement portion is engageable with the cartridge attachment section. The adaptor body has a front wall at its leading end in the insertion direction. The front wall has an opening through which the supply portion extends. The electrical interface is disposed on an outer surface of the adaptor body and electrically connectable to an electric contact of the cartridge attachment section.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction to be detachably attached to the cartridge attachment section includes a printing-fluid cartridge and an adaptor. The cartridge includes: a casing; a supply portion; and a detection portion. The adaptor, to which the printing-fluid cartridge is configured to be detachably assembled, includes: an adaptor body into which the printing-fluid cartridge is insertable; an electrical interface; and an engagement portion. The adaptor body has a leading end and a trailing end in the insertion direction. The adaptor body has a front wall at the leading end, has an opening through which the supply portion extends, and further has an outer surface. The electrical interface is disposed on the outer surface. The engagement portion is configured to engage with the cartridge attachment section.

Abstract: A liquid cartridge includes: a cartridge casing having a liquid storage chamber; a first wall; a second wall; and an air communication passage. The first wall is positioned upward relative to the liquid storage chamber. The second wall is positioned upward relative to the first wall. The air communication passage has a first communication hole in communication with the liquid storage chamber and a communication opening open to an atmosphere. The air communication passage includes: an air chamber defined by the first wall and the second wall and in communication with the liquid storage chamber through the first communication hole; a second communication hole formed in the second wall; and a labyrinth path. The labyrinth path is positioned upward relative to the air chamber, and has one end in communication with the second communication hole and another end in communication with the communication opening.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction includes: a printing-fluid cartridge and an adaptor to which the cartridge is detachably assembled. The cartridge includes: a casing; a supply portion; a detection portion; and an engagement portion. The adaptor includes: an adaptor body; and an electrical interface. The detection portion includes a light accessible portion accessed by light from an outside of the cartridge. The engagement portion is engageable with the cartridge attachment section. The adaptor body has a front wall at its leading end in the insertion direction. The front wall has an opening through which the supply portion extends. The electrical interface is disposed on an outer surface of the adaptor body and electrically connectable to an electric contact of the cartridge attachment section.

Abstract: A liquid cartridge includes: a cartridge casing having a liquid storage chamber; a first wall; a second wall; and an air communication passage. The first wall is positioned upward relative to the liquid storage chamber. The second wall is positioned upward relative to the first wall. The air communication passage has a first communication hole in communication with the liquid storage chamber and a communication opening open to an atmosphere. The air communication passage includes: an air chamber defined by the first wall and the second wall and in communication with the liquid storage chamber through the first communication hole; a second communication hole formed in the second wall; and a labyrinth path. The labyrinth path is positioned upward relative to the air chamber, and has one end in communication with the second communication hole and another end in communication with the communication opening.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction includes: a printing-fluid cartridge and an adaptor to which the cartridge is detachably assembled. The cartridge includes: a casing; a supply portion; a detection portion; and an engagement portion. The adaptor includes: an adaptor body; and an electrical interface. The detection portion includes a light accessible portion accessed by light from an outside of the cartridge. The engagement portion is engageable with the cartridge attachment section. The adaptor body has a front wall at its leading end in the insertion direction. The front wall has an opening through which the supply portion extends. The electrical interface is disposed on an outer surface of the adaptor body and electrically connectable to an electric contact of the cartridge attachment section.

Abstract: A liquid cartridge includes: a front surface facing frontward; a rear surface spaced apart from the front surface; an upper surface facing upward; a bottom surface disposed opposite to the upper surface and facing downward; a liquid supply portion disposed at the front surface; an electrical interface disposed at the upper surface; a detection portion; and an engaging portion disposed at the bottom surface and configured to protrude downward relative to the bottom surface. The upper surface and the bottom surface are disposed between the front surface and the rear surface. The detection portion includes a light-receiving portion positioned upward relative to the upper surface and configured to receive light. The detection portion is configured to change a state of the light received at the light-receiving portion depending on a state of the liquid cartridge. The engaging portion includes an engaging surface facing rearward.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction to be detachably attached to the cartridge attachment section includes a printing-fluid cartridge and an adaptor. The cartridge includes: a casing; a supply portion; and a detection portion. The adaptor, to which the printing-fluid cartridge is configured to be detachably assembled, includes: an adaptor body into which the printing-fluid cartridge is insertable; an electrical interface; and an engagement portion. The adaptor body has a leading end and a trailing end in the insertion direction. The adaptor body has a front wall at the leading end, has an opening through which the supply portion extends, and further has an outer surface. The electrical interface is disposed on the outer surface. The engagement portion is configured to engage with the cartridge attachment section.

Abstract: A liquid cartridge includes: a cartridge casing having a liquid storage chamber; a first wall; a second wall; and an air communication passage. The first wall is positioned upward relative to the liquid storage chamber. The second wall is positioned upward relative to the first wall. The air communication passage has a first communication hole in communication with the liquid storage chamber and a communication opening open to an atmosphere. The air communication passage includes: an air chamber defined by the first wall and the second wall and in communication with the liquid storage chamber through the first communication hole; a second communication hole formed in the second wall; and a labyrinth path. The labyrinth path is positioned upward relative to the air chamber, and has one end in communication with the second communication hole and another end in communication with the communication opening.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction to be detachably attached to the cartridge attachment section includes a printing-fluid cartridge and an adaptor. The cartridge includes: a casing; a supply portion; and a detection portion. The adaptor, to which the printing-fluid cartridge is configured to be detachably assembled, includes: an adaptor body into which the printing-fluid cartridge is insertable; an electrical interface; and an engagement portion. The adaptor body has a leading end and a trailing end in the insertion direction. The adaptor body has a front wall at the leading end, has an opening through which the supply portion extends, and further has an outer surface. The electrical interface is disposed on the outer surface. The engagement portion is configured to engage with the cartridge attachment section.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction to be detachably attached to the cartridge attachment section includes a printing-fluid cartridge and an adaptor. The cartridge includes: a casing; a supply portion; and a detection portion. The adaptor, to which the printing-fluid cartridge is configured to be detachably assembled, includes: an adaptor body into which the printing-fluid cartridge is insertable; an electrical interface; and an engagement portion. The adaptor body has a leading end and a trailing end in the insertion direction. The adaptor body has a front wall at the leading end, has an opening through which the supply portion extends, and further has an outer surface. The electrical interface is disposed on the outer surface. The engagement portion is configured to engage with the cartridge attachment section.

Abstract: A printing-fluid containing device configured to be inserted into a cartridge attachment section in an insertion direction includes: a printing-fluid cartridge and an adaptor to which the cartridge is detachably assembled. The cartridge includes: a casing; a supply portion; a detection portion; and an engagement portion. The adaptor includes: an adaptor body; and an electrical interface. The detection portion includes a light accessible portion accessed by light from an outside of the cartridge. The engagement portion is engageable with the cartridge attachment section. The adaptor body has a front wall at its leading end in the insertion direction. The front wall has an opening through which the supply portion extends. The electrical interface is disposed on an outer surface of the adaptor body and electrically connectable to an electric contact of the cartridge attachment section.

Abstract: A liquid cartridge includes: a front surface facing frontward; a rear surface spaced apart from the front surface; an upper surface facing upward; a bottom surface disposed opposite to the upper surface and facing downward; a liquid supply portion disposed at the front surface; an electrical interface disposed at the upper surface; a detection portion; and an engaging portion disposed at the bottom surface and configured to protrude downward relative to the bottom surface. The upper surface and the bottom surface are disposed between the front surface and the rear surface. The detection portion includes a light-receiving portion positioned upward relative to the upper surface and configured to receive light. The detection portion is configured to change a state of the light received at the light-receiving portion depending on a state of the liquid cartridge. The engaging portion includes an engaging surface facing rearward.

Abstract: A liquid cartridge includes a liquid chamber, a valve chamber extending in a first direction away from the liquid chamber, first and second air channels, a movable body, and first and second sealing parts. The valve chamber is defined by a side wall surface and a proximal wall surface, the side wall surface extending in the first direction and having an annular-shaped cross-section and being formed with a first opening and a second opening separated from each other in a circumferential direction. The movable body is disposed within the valve chamber and movable in a in a second direction opposite to the first direction from a first state to a second state. In the first state, the first sealing part interrupts communication between the first and second openings. In the second state, the first opening and the second opening are in communication with each other.