Developer Cartridge, Developing Device and Image Forming Apparatus

A developing device comprising:

• a developer cartridge comprising:
• a cartridge cabinet that accommodates developer and includes an opening for enabling communication between an inside of the cartridge cabinet and an outside of the cartridge cabinet;
• a shutter that opens and closes the opening;
• and
• a cover that is arranged outside the cartridge cabinet and is movable between a closed position for closing the opening and an opened position for opening the opening, the opened position being located lower than the closed position,
• wherein the cover is movable such that a first end of the cover is in intimate contact with the cartridge cabinet while a second end of the cover is separated from the cartridge cabinet, the first end being farthest from the opening in the cover located in the opened position, and the second end being nearest to the opening in the cover located in the opened position;
• a developing cabinet, the developer cartridge being attachable to and detachable from the developing cabinet;
• and
• a developer carrier that is supported in the developing cabinet and carries the developer to a photosensitive member,
• wherein the developer cartridge further comprises a protrusion part for moving the cover from the closed position to the opened position according to attachment of the developer cartridge to the developing cabinet.

An image forming apparatus comprising a developing device, the developing device comprising:

• a developer cartridge comprising:
• a cartridge cabinet that accommodates developer and includes an opening for enabling communication between an inside of the cartridge cabinet and an outside of the cartridge cabinet;
• a shutter that opens and closes the opening;
• and
• a cover that is arranged outside the cartridge cabinet and is movable between a closed position for closing the opening and an opened position for opening the opening, the opened position being located lower than the closed position,
• wherein the cover is movable such that a first end of the cover is in intimate contact with the cartridge cabinet while a second end of the cover is separated from the cartridge cabinet, the first end being farthest from the opening in the cover located in the opened position, and the second end being nearest to the opening in the cover located in the opened position;
• a developing cabinet, the developer cartridge being attachable to and detachable from the developing cabinet, the developing cabinet comprising an operation member, wherein the protrusion part moves the cover from the closed position to the opened position by being pressed on the operation member according to attachment of the developer cartridge to the developing cabinet;
• and
• a developer carrier that is supported in the developing cabinet and carries the developer to a photosensitive member, wherein the developer cartridge further comprises a protrusion part for moving the cover from the closed position to the opened position according to attachment of the developer cartridge to the developing cabinet.