Patent ID: 7995961

Claim:
A waste developer collecting device comprising: a collecting container that collects a waste developer discharged from image forming unit including a developing unit for developing an electrostatic latent image with a developer; a collecting opening that is disposed on an inner wall surface of the collecting container, and collects the waste developer and air discharged from the developing unit; a conveying unit that is disposed in the collecting container, rotates about a shaft, and conveys the waste developer entering through the collecting opening in the collecting container; a filter that passes the air collected in the collecting container through the collecting opening, and blocks the waste developer; a partition wall that partitions an inside of the collecting container into the filter and a containing area for containing the waste developer; and an air inlet that is formed in an end portion of the partition wall on an upstream side in a conveying direction of the waste developer conveyed by the conveying unit, and that sends the air entering into the collecting container to the filter along the partition wall.