Patent ID: 7561819

Claim:
An image forming apparatus comprising: a plurality of image forming units having respectively toner image forming means for forming toner images on corresponding image carriers; an endless belt member arranged opposite to the image carriers to bear and move the toner images transferred from the image carriers as primary transfer and transfer them on a transfer medium; a cleaning member holding a cleaning blade, the cleaning blade being adapted to be brought into contact with and moved away from the belt member, and arranged opposite to the belt member after transferring the toner images to the transfer medium, the cleaning member capable of being mounted and dismounted independently relative to the belt member; a pushing member movable between a toner recovering position and a mounting/dismounting position and adapted to push the cleaning member in the direction toward the belt member at the toner recovering position so as to bring the cleaning blade into contact with the belt member; a release member having a pressure release cam rotated and stand still in a release position by an operation of moving the cleaning blade away from the belt member to move the pushing member from the toner recovering position to the mounting/dismounting position and release the pressure being applied to the cleaning member; and a restoration member having a restoration cam rotated by an operation of contacting with the cleaning member when the cleaning member is mounted and takes out the pressure release cam from the release position interlocked with the rotation of the restoration cam to move the pushing member from the mounting/dismounting position to the toner recovering position.