Patent ID: 8023856
Filing Date: 2011-09-20
Classification: G03G

Abstract:
1. An image-forming device comprising: a main body that includes an image-forming unit for forming images on a recording medium; a belt that is disposed in the main body and moves circularly, the belt having an outer surface; a cleaning roller that contacts the outer surface of the belt for removing extraneous matter deposited on the outer surface of the belt; a pair of backup rollers that is disposed in opposition to the cleaning roller with the belt interposed between the backup rollers and the cleaning roller, each of the backup rollers having a rotational axis, the pair of backup rollers contacting the belt at first and second positions and the cleaning roller contacting the belt at a third position where the third position is interposed between the first and second positions; a holder that rotatably holds the pair of backup rollers, rotational axes of the backup rollers being kept parallel to each other; an urging unit for urging the backup rollers toward the cleaning roller; and a driving unit that is supported on the main body and that moves the holder to change a distance between the pair of backup rollers and the cleaning roller, wherein the driving unit comprises: an engaging member that is provided on the holder; and a receiving member that is provided on the urging unit and pivotably engages with the engaging member.