A recording apparatus 101 includes a liquid storage portion 46 configured to store liquid, a recording head 22 that ejects liquid supplied from the liquid storage portion 46 onto the medium, and a light emitting unit 301 configured to emit light, wherein the liquid storage portion 46 has a float 48 configured to float on liquid in the liquid storage portion 46 and to move according to movement of liquid surface LS while maintaining a posture, and a front surface 43F in which the liquid in the liquid storage portion 46 is visually checkable from outside the liquid storage portion 46, wherein the float 48 has a front surface 48a that by receiving the light from the light emitting unit 301, appears luminous when viewed from a direction facing the front surface 43F.

An ink-jet printing apparatus includes an ink-cartridge mounting unit to which an ink cartridge having a first ink chamber containing ink is to be mounted, and a second ink chamber. The second ink chamber stores ink supplied from the first ink chamber. The ink-jet printing apparatus is configured such that, in a case where the ink cartridge is mounted to the ink-cartridge mounting unit, the second ink chamber can be viewed from outside of the ink-jet printing apparatus. An equation 0.5≤L≤d≤1.2 L is satisfied, where d is a length of the second ink chamber, and L is a length of the ink cartridge in a direction in which the ink cartridge is inserted into the ink-jet printing apparatus.

A liquid cartridge configured to be inserted in a frontward direction to a printer includes: a housing; a liquid supply portion; a circuit board; a plate; and a detection portion. The circuit board includes an electrode group facing upward in an upright posture of the liquid cartridge. The electrode group includes a first electrode, a second electrode, and a third electrode for grounding. The first to third electrodes are arrayed in a lateral direction crossing the frontward direction and a gravitational direction such that the third electrode is positioned between the first and second electrodes. In the upright posture of the liquid cartridge, the plate and the detection portion are respectively positioned upward and rearward relative to the circuit board. Each of the third electrode and an upper portion of the plate is positioned a datum plane extending in the frontward direction and in the gravitational direction.

A liquid ejection apparatus includes: a storage chamber which is connectable to a cartridge storing liquid and stores liquid supplied from the cartridge; a movable member provided in the storage chamber and including a float and a detection target portion, the float being lower in specific gravity than the liquid stored in the storage chamber; and a detection unit which detects movement of the movable member by detecting the detection target portion. The detection target portion is movable from a first position to a third position through a second position. The detection unit is arranged to detect the detection target portion in a case where the detection target portion is present at the second position.

An ink tank for an ink delivery system includes: a housing having an ink inlet port and an ink outlet port; an air vent communicating with a headspace of the ink tank; a filter positioned in the housing for filtering ink supplied from the ink tank via the ink outlet port; and a baffle plate positioned in the housing between the ink inlet port and the filter. The baffle plate is configured for directing air bubbles entering the ink tank via the ink inlet port towards the headspace of the ink tank. A baffle opening is positioned towards a base of the ink tank, thereby allowing ink to flow from the ink inlet port towards the ink outlet port via the baffle opening.

A liquid storage container includes a container main body that is capable of storing a liquid and at least a portion of which includes a translucent outer wall; a support member that is integrally formed with the container main body; and a rotation member that is rotatably supported by the support member. The rotation member includes a float that rotates due to fluctuations in a liquid level of the liquid, and a display member that rotates in conjunction with the float and is capable of displaying a position of the float to an outside through the translucent outer wall.

An ink cartridge includes an ink chamber that stores ink. A protruding chamber protrudes upward from the ink chamber in a gravitational direction when the ink cartridge is used. A swing body has a float and a detection portion, and a detection chamber in which the detection portion moves and with which an amount of ink stored in the ink chamber is detected in accordance with a position of the detection portion. In the ink cartridge, a pivot center of the swing body that pivotally moves is disposed inside the protruding chamber.

A technique with which deterioration in a function of detecting the remaining amount of liquid can be prevented even in a case where the liquid is thickened or solidified is to be provided. A liquid ejection apparatus is provided with a liquid ejection head configured to eject supplied liquid, a storage unit configured to store the liquid to be supplied to the liquid ejection head, a pivot member configured to be immersed in the liquid stored in the storage unit and be revolvable according to the amount of the liquid, and a detection unit configured to detect the amount of the liquid by use of the pivot member, and the liquid ejection apparatus includes a pivot unit configured to force the pivot member to pivotally move.

An ink-jet printing apparatus includes an ink-cartridge mounting unit to which an ink cartridge having a first ink chamber containing ink is to be mounted, and a second ink chamber. The second ink chamber stores ink supplied from the first ink chamber. The ink-jet printing apparatus is configured such that, in a case where the ink cartridge is mounted to the ink-cartridge mounting unit, the second ink chamber can be viewed from outside of the ink-jet printing apparatus. An equation 0.5 L ≤ d ≤ 1.2 L is satisfied, where d is a length of the second ink chamber, and L is a length of the ink cartridge in a direction in which the ink cartridge is inserted into the ink-jet printing apparatus.

Provided is a liquid-ejection-apparatus including: a retention-chamber to retain liquid; a turning-member located in the retention-chamber and turns about a shaft-portion according to a height of a liquid-surface of the liquid in the retention-chamber; and a sensor-unit to detect turning of the turning-member. The turning-member includes a float-portion having a lower specific gravity than the liquid in the retention-chamber and a detected portion located above the float-portion and detected by the sensor-unit. A liquid-holding-portion is formed, the liquid-holding-portion extending to the shaft-portion from at least one of a side-surface-portion and a bottom-surface-portion of the float-portion and which can hold the liquid in the retention-chamber. Where the liquid-surface of the liquid in the retention-chamber is at or below a predetermined height, the liquid-holding-portion touches the liquid-surface of the liquid in the retention-chamber to maintain the height of the liquid-surface near the shaft-portion to a height where the shaft-portion is located.