| 主权项 |
1. A developer container comprising:
a container body including an inner circumferential surface defining a cylindrical internal space extending in a first direction, and having opposite first and second longitudinal ends, a wall part at the first end of the cylindrical inner space and defining a first end surface of the internal space, an opening at the second end of the internal space opposite to the wall part, and the container body being formed with a developer discharge port to communicate with the internal space and to discharge developer therethrough, the developer discharge port being closer to the wall part at the first end of the internal space than to the opening at the second end thereof; a lid mounted on the container body in the first direction to cover the opening at the second end of the internal space; a movable wall including an outer circumferential surface slidable over and in close contact with the inner circumferential surface of the container body, and a conveying surface defining a storage space for the developer in cooperation with the inner circumferential surface and the wall part of the container body, the movable wall being movable in the internal space in the first direction from an initial position closer to the lid of the container body to a terminal position closer to the wall part while conveying the developer in the storage space to the developer discharge port; and a sealing member; a shaft including a first engaging portion in the form of a helical ridge in an outer circumferential surface thereof, extending in the first direction in the internal space, and one end and the other end of the shaft being supported on the wall part and the lid rotatably; a bearing portion disposed on the movable wall for allowing the shaft to be inserted, and including a second engaging portion on an inner circumferential surface thereof and engaging with the first engaging portion; a torque transfer section for transferring a torque to the shaft; a projecting wall projecting from the wall part at a side opposite to the lid and having a cylindrical shape, and a cover mounted to an end of the projecting wall, wherein the wall part has a developer filling port penetrating the wall part in a mounting direction in which the lid is mounted on the container body and communicating with the storage space, the sealing member seals the developer filling port, when the shaft is rotated, owing to the engagement of the first engaging portion and the second engaging portion, the movable wall moves along the shaft in the first direction, and the cover covers the developer filling port sealed by the sealing member. |
