Liquid replenishment container

1 . A liquid replenishment container that replenishes a liquid in a liquid ejecting apparatus including a liquid introduction needle via the liquid introduction needle, the liquid replenishment container comprising:

a container body portion having an opening and configured to contain the liquid;

a liquid outlet forming portion having a liquid outlet, the liquid outlet forming portion coupled to the container body portion and including a cylindrical portion that defines a liquid outflow path communicating with the opening; and

a cap configured to be attached to and detached from the liquid outlet forming portion, wherein

the liquid outlet forming portion includes a valve disposed in the liquid outflow path,

when an engagement between the container body portion and the liquid outlet forming portion is a first engagement, and an engagement between the liquid outlet forming portion and the cap is a second engagement, the first engagement is a threaded engagement, and the second engagement has a non-threaded fitting structure configured to be released in an axial direction without rotation, and

the second engagement is disposed on an outer surface of the liquid outlet forming portion at a position away from the liquid outlet.

2 . The liquid replenishment container according to claim 1 , wherein

the liquid outlet forming portion includes a sealing member disposed downstream of the valve in a liquid outflow direction of the liquid outflow path, and an inner plug disposed in the liquid outflow path between the opening and the valve, the inner plug being engaged with the liquid outlet forming portion in such a way as to be detachable by being pressed by the liquid introduction needle via the valve, and

the valve includes a spring member, a valve body that comes into contact with the sealing member by being urged by the spring member in a valve-closed state and is separated from the sealing member by being pressed by the liquid introduction needle inserted into the liquid outflow path in a valve-open state, and a contact portion that moves in conjunction with the valve body at least in the valve-open state and that comes into contact with the inner plug.

3 . The liquid replenishment container according to claim 1 , wherein

the valve is a slit valve in which one or more slits are formed in an elastic member and which is opened when the slit is pushed wide by the liquid introduction needle and is closed when the liquid introduction needle is drawn out from the slit,

a film that blocks a liquid flow is disposed on the opening or in the liquid outflow path between the opening and the valve, and

the film is configured to break by insertion of the liquid introduction needle into the opening or the liquid outflow path to open the liquid outflow path.

4 . The liquid replenishment container according to claim 1 , wherein

the second engagement is positioned closer to the container body portion than the valve is.

5 . A liquid replenishment container that replenishes a liquid in a liquid ejecting apparatus including a liquid introduction needle via the liquid introduction needle, the liquid replenishment container comprising:

a container body portion having an opening and configured to contain the liquid;

a liquid outlet forming portion coupled to the container body portion and including a cylindrical portion that defines a liquid outflow path communicating with the opening; and

a cap configured to be attached to and detached from the liquid outlet forming portion, wherein

the liquid outlet forming portion includes a valve disposed in the liquid outflow path,

when an engagement between the container body portion and the liquid outlet forming portion is a first engagement, and an engagement between the liquid outlet forming portion and the cap is a second engagement, the first engagement is a threaded engagement, and the second engagement has a fitting structure configured to be released in an axial direction without rotation,

the liquid outlet forming portion includes a sealing member disposed downstream of the valve in a liquid outflow direction of the liquid outflow path, and an inner plug disposed in the liquid outflow path between the opening and the valve, the inner plug being engaged with the liquid outlet forming portion in such a way as to be detachable by being pressed by the liquid introduction needle via the valve, and

the valve includes a spring member, a valve body that comes into contact with the sealing member by being urged by the spring member in a valve-closed state and is separated from the sealing member by being pressed by the liquid introduction needle inserted into the liquid outflow path in a valve-open state, and a contact portion that moves in conjunction with the valve body at least in the valve-open state and that comes into contact with the inner plug.