Liquid container and liquid ejection system

A liquid ejection system including a liquid ejection apparatus and a liquid container, the liquid ejection system comprising, when a direction parallel to a gravity direction are Z directions, a direction of the Z directions which is the same as the gravity direction is a +Z direction, a direction of the Z directions opposite to the gravity direction is a −Z direction, directions intersecting the Z directions are Y directions, one direction of the Y directions is a +Y direction and another direction of the Y directions is a −Y direction, directions orthogonal to the Z directions and the Y directions are X directions, one direction of the X directions is a +X direction and another direction of the X directions is a −X direction:

• a housing including a case storage portion;
• a case configured to move along the +Y direction to thereby be inserted into the case storage portion, the case including a hollow protrusion protruding toward the −Z direction side at an end portion on the +Y direction side, and a case-side fixing structure including an internal space of the protrusion;
• an apparatus-side fixing structure configured to engage with the case-side fixing structure to restrict movement of the case toward the −Y direction while a force facing the −Z direction side is applied to the case in a case storage state in which the case is mounted to the case storage portion;
• a liquid introduction portion positioned on an end of the case storage portion on the +Y direction side;
• an apparatus-side electrical connection unit positioned on the +Y direction side of the case storage portion;
• and
• a first positioning portion and a second positioning portion which each extend from an end portion of the case storage portion on the +Y direction side toward the −Y direction side and are provided at positions separated from each other in the X directions and sandwich the liquid introduction portion,
• wherein the liquid container is configured to be mounted to and removed from the case of the liquid ejection apparatus, and includes:
• a storage portion having flexibility and configured to store liquid;
• and
• a connection member positioned on an end on the +Y direction side when the liquid container is in a mounting state in which the liquid container is mounted to the liquid ejection apparatus,
• wherein the connection member is provided with:
• a liquid outlet configured to receive insertion of the liquid introduction portion in the −Y direction in the mounting state;
• a container-side electrical connector configured to electrically connect to the apparatus-side electrical connection unit while receive at least force having a +Z direction component from the apparatus-side electrical connection unit in the mounting state;
• a first receiver configured to receive the first positioning portion in the mounting state;
• a second receiver configured to receive the second positioning portion in the mounting state;
• and
• a recess recessed in the −Z direction and configured to house the protrusion of the case in the mounting state,
• wherein the recess and the container-side electrical connector are provided at positions at which the recess and the container-side electrical connector at least partially overlap when viewed from the Z directions in a posture in the mounting state, and
• wherein, in the posture in the mounting state, a width of the liquid container in the Z directions is smaller than a width of the liquid container in the Y directions and a width of the liquid container in the X directions.