Patent ID: 8238781

Claim:
An image forming apparatus comprising: a cartridge including a rotatable image bearing member configured to bear a toner image, wherein the cartridge insertable into and drawn out of a body of the image forming apparatus in a direction of a rotation axis of the image bearing member; a transmission member configured to transmit light emitted toward the image bearing member; and a cleaning member configured to clean a surface of the transmission member, wherein the cleaning member is moved in the direction of the rotation axis of the image bearing member in conjunction with the cartridge being inserted into or drawn out of the body of the image forming apparatus so as to clean the transmission member, wherein the cleaning member is engaged with the cartridge and moved in the direction of the rotation axis of the image bearing member while the cartridge is inserted into or drawn out of the body of the image forming apparatus, and wherein, when the cartridge is out of the body of the image forming apparatus, the cleaning member is disengaged from the cartridge and within the body of the image forming apparatus.