Developing device

A developing device for use in an apparatus main body of an image forming device, the developing device comprising:

• a developing container including an accommodation chamber configured to accommodate a developer and a developing chamber communicating with the accommodation chamber through a communication port;
• a developer carrier configured to carry the developer, the developer carrier being provided in the developing chamber;
• a conveyance member configured to convey the developer in the accommodation chamber toward the communication port by a sheet, the conveyance member including a rotation shaft and the sheet which is flexible and has a first end fixed to the rotation shaft in a direction perpendicular to the rotation shaft, the conveyance member being provided in the accommodation chamber so as to rotate around a rotation axis;
• a pair of electrodes configured to apply a voltage from outside of the accommodation chamber, the pair of electrodes being positioned above the communication port in a state where the developing device is in use in the apparatus main body;
• and
• an abutting portion configured to abut on a second end of the sheet opposite to the first end in the direction perpendicular to the rotation shaft such that the sheet is maintained in a bent state until the second end passes in front of the communication port from an upstream end of the communication port in a rotation direction of the conveyance member and then reaches the pair of electrodes.

A cartridge that is detachable from an apparatus main body of an image forming device, the cartridge comprising:

• a developing container including an accommodation chamber configured to accommodate a developer and a developing chamber communicating with the accommodation chamber through a communication port;
• a developer carrier configured to carry the developer, the developer carrier being provided in the developing chamber;
• a conveyance member configured to convey the developer in the accommodation chamber toward the communication port by a sheet, the conveyance member including a rotation shaft and the sheet which is flexible and has one end fixed to the rotation shaft in a direction perpendicular to the rotation shaft, the conveyance member being provided in the accommodation chamber so as to rotate around a rotation axis;
• a light transmitting member provided in the developing container, the light transmitting member being configured to transmit light from outside of the cartridge into the accommodation chamber and from inside of the accommodation chamber toward outside of the cartridge and being positioned above the communication port when the cartridge is oriented in a direction in which the cartridge is mounted on the apparatus main body;
• and
• a connecting portion extending from an upstream end to a downstream end of the communication port in a rotation direction of the conveyance member and connecting the upstream end to the downstream end, and the connecting portion being configured to abut on the sheet when the conveyance member is rotated.