| 摘要 |
A liquid supplying device includes a liquid cartridge and a cartridge mounting unit having a liquid extraction tube. The 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 seal member having a through-hole, a valve element having a closing part, first and second sealing parts and a liquid channel. A third sealing part is provided on the closing part or the liquid extraction tube. The liquid extraction tube entering into the valve chamber through the through-hole contacts the closing part, moving the valve element in a second direction opposite to the first direction from a first state where the closing part closes the through-hole, to a second state where the third sealing part closes the through-hole, and to a third state where the valve chamber is communicated with inside of the liquid extraction tube. |
| 主权项 |
1. A liquid cartridge comprising:
a liquid chamber configured to store liquid therein; a valve chamber extending in a first direction away from the liquid chamber, the valve chamber being defined by a wall surface including 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 taken along a plane orthogonal to the first direction, the side wall surface having a first end and a second end positioned downstream of the first end in the first direction, the proximal wall surface provided on the first end of the side wall surface, the wall surface being formed with a first opening and a second opening, at least one of the first opening and the second opening being formed in the side wall surface; a first air channel configured to allow air to flow between the valve chamber and ambient air through the first opening; a second air channel configured to allow air to flow between the liquid chamber and the valve chamber through the second opening; a seal member provided on the second end of the side wall surface, the seal member being formed with a through-hole defined by a peripheral surface; a valve element disposed within the valve chamber and including a closing part configured to contact the seal member to close the through-hole, the valve element having an outer surface; a first sealing part having an annular shape and provided on the outer surface of the valve element, the first sealing part being in close contact with the side wall surface and configured to move in a second direction opposite to the first direction; a second sealing part having an annular shape and provided on the outer surface of the valve element at a position toward the second end of the side wall surface from the first sealing part, the second sealing part being in close contact with the side wall surface and configured to move in the second direction, the first sealing part and the second sealing part defining an enclosed space therebetween in the valve chamber; and a liquid channel configured to allow liquid to flow between the liquid chamber and a portion of the valve chamber toward the second end of the side wall surface from the second sealing part, wherein the valve element is configured to move in the second direction from a closed state to an open state, and wherein: in the closed state, the closing part closes the through-hole of the seal member, the first sealing part interrupting air flow between the first opening and the second opening and the second sealing part being positioned toward the second end of the side wall surface from the first opening and the second opening; and in the open state, the closing part is separated from the seal member and the liquid channel is in communication with outside of the valve chamber, air being allowed to flow between the first opening and the second opening through the enclosed space. |
