Patent ID: 8229316

Claim:
An image forming apparatus, comprising: a first belt roller which has a first rover shaft; a second belt roller which is disposed parallel with the first roller shaft and slidingly approaches and departs from the first roller shaft, and has a second roller shaft; a belt which is driven in circulation by the first belt roller and the second belt roller; an elastic tension member which elastically pushes the second belt roller to be separated from the first belt roller; and a belt cleaning unit which is movable between a cleaning position contacting a surface of the belt and a stand-by position departed from the surface of the belt, wherein the belt cleaning unit includes: a blade which is enabled to contact the surface of the belt; a blade supporting member which supports the blade; a slide member which rotatably supports the blade supporting member about a blade rotating axis being parallel with the second roller shaft and is able to slide along with the second roller shaft; and a blade elastic member which connects the blade supporting member and the slide member to apply elastic force to the blade supporting member to be rotated to the cleaning position.