Ink replenishment container

An ink replenishment container that replenishes an ink tank of a printer with ink via an ink introduction member having a plurality of flow paths partitioned by a partition, the flow paths communicating with the ink tank, the ink replenishment container comprising:

• a container main body configured to accommodate ink;
• an ink outlet forming portion that is coupled to the container main body and includes a tubular portion that forms an outlet on a side opposite from the container main body;
• and
• an outlet valve unit that is mounted in the ink outlet forming portion, is opened by the ink introduction member being inserted into the tubular portion from the outlet, and is closed by the ink introduction member being removed from the tubular portion, wherein
• the outlet valve unit includes
• a valve body that is movably disposed in a central axis direction along a central axis of the tubular portion,
• a spring member that biases the valve body toward the outlet side, and
• a seal member that is positioned on the outlet side with respect to the valve body in the central axis direction and includes a through-hole into and from which the ink introduction member is inserted and removed,
• the seal member further includes a first seal portion that closes the through-hole by being in contact with the valve body in a valve-closed state of the outlet valve unit,
• a gap is formed between the first seal portion and the valve body in a valve-open state of the outlet valve unit,
• the valve body includes
• a cylindrical portion extending in the central axis direction,
• a seal surface that is formed on an outlet-side end surface of the cylindrical portion positioned on the outlet side, and extends in a radial direction of the cylindrical portion intersecting the central axis direction, the seal surface being in contact with the first seal portion in the valve-closed state, and
• a protrusion that is formed on the outlet-side end surface on an inner side with respect to the seal surface in the radial direction,
• the protrusion includes
• a partition contact portion that is positioned on the outlet side with respect to the seal surface in the central axis direction and is in contact with the partition of the ink introduction member in the valve-open state, and
• an inclined surface extending from the partition contact portion toward the seal surface,
• a cross-sectional area of the protrusion in a direction orthogonal to the central axis direction is larger on the side opposite from the outlet than on the outlet side, and
• an angle formed between the inclined surface and the seal surface is 110 degrees or more.