A combination of a toner cartridge and a developing device, the combination comprising:
- a toner cartridge comprising:
- a casing that is configured to accommodate toner therein, the casing being formed with a first casing opening, the casing having one edge and another edge opposite to the one edge along a predetermined direction, the one edge being located at an upstream side relative to the another edge in the predetermined direction, the first casing opening being located at the another edge;
- a partitioning wall that is configured to be rotatable relative to the casing around a predetermined rotational axis, the partitioning wall having a side surface that extends substantially parallel to the rotational axis and a pair of opposite ends that are arranged opposing each other along the rotational axis, a first partitioning-wall opening being formed through the side surface of the partitioning wall, the first partitioning-wall opening being selectively aligned with the first casing opening when the partitioning wall is rotated relative to the casing, the first partitioning-wall opening providing communication between the interior and exterior of the casing to discharge toner from the casing when aligned with the first casing opening;
- and
- an operation member rotating the partitioning wall relative to the casing, the operation member including a pair of lever members rotatably supported on the casing that when rotated apply a rotating operation to both of the pair of opposite ends of the partitioning wall,
- wherein the casing includes:
- a curved downstream end part that is located at the another edge, the curved downstream end part having therein an inner hollow space substantially of a cylindrical shape, the curved downstream end part having a curved surface that is curved around the rotational axis, the partitioning wall being rotatable relative to the curved downstream end part along the curved surface, the first casing opening being formed in the curved downstream end part in communication with the inner hollow space of the curved downstream end part;
- an upstream part that is located in the upstream side of the curved downstream end part in the predetermined direction and that is connected to the curved downstream end part, the upstream part having therein an inner hollow space, the inner hollow space of the upstream part accommodating toner therein;
- and
- an intermediate wall located between the curved downstream end part and the upstream part, a second casing opening being formed through the intermediate wall and communicating the inner hollow space of the curved downstream end part with the inner hollow space of the upstream part, the second casing opening being located opposing the first casing opening along the predetermined direction;
- and
- a developing device that develops electrostatic latent images by depositing toner discharged from the toner cartridge onto the latent images,
- the developing device comprising:
- a developing device wall that is configured to receive the toner cartridge thereon, the developing-device wall being formed with a developing-device-side opening that is disposed opposite the first casing opening in the toner cartridge to receive toner discharged from the first casing opening through the first partitioning-wall opening when the developing-device wall receives the toner cartridge thereon;
- a shutter that is configured to open and close the developing-device-side opening;
- a holding mechanism that holds the shutter so that the shutter is configured to move between a position exposing the developing-device-side opening and a position closing the developing-device-side opening;
- and
- a transmission mechanism that engages with the lever members of the toner cartridge to move the shutter as the lever members rotate and that transmits the rotation of the lever members to the both ends of the partitioning wall in the toner cartridge.