Patent ID: 8630554

Claim:
An image forming device comprising: a main body; and a cartridge that is detachably mountable on the main body, the cartridge comprising: a casing; an image bearing member that is rotatably supported in the casing; a first cleaning roller that is rotatably supported in the casing, contacts the image bearing member, and is configured to clean a surface of the image bearing member by voltage difference between the image bearing member and the first cleaning member; a second cleaning roller that is rotatably supported in the casing, is configured to contact the first cleaning member, and is configured to clean a surface of the first cleaning member by voltage difference between the first cleaning roller and the second cleaning roller; a first contact portion that is electrically connected to the first cleaning roller, and includes a first exposure part that is exposed outside of the casing; a second contact portion that is electrically connected to the second cleaning roller, and includes a second exposure part that is exposed outside of the casing; and a state changing unit that is configured to irreversibly change an electrically disconnected state between the first cleaning roller and the second cleaning roller into an electrically connected state between the first cleaning roller and the second cleaning roller, the image forming device further comprising: a voltage applying unit that is configured to apply voltage to the first cleaning roller via the first contact portion and apply voltage to the second cleaning roller via the second contact portion such that the voltage difference between the first cleaning roller and the second cleaning roller is generated; a drive unit that is configured to rotate the image bearing member; a current detecting unit that is configured to detect current generated by the voltage applying unit before and after the image bearing member rotates; a storing unit that is configured to store a cumulative value that increases when the image bearing member is used; and a resetting unit that is configured to reset the cumulative value when the current detecting unit does not detect current before the image bearing member rotates and detects current after the image bearing member rotates.