Patent ID: 7509074

Claim:
An image forming apparatus configured to form a color image, comprising: a photo-conductive member arranged in a belt shape and configured to form a plurality of electrostatic latent color images; a plurality of developing devices configured to face the photo-conductive member and configured to develop the plurality of electrostatic latent color images into a plurality of toner color images; a plurality of support rollers configured to support the photo-conductive member; an intermediate transfer member configured to contact with the photo-conductive member to sequentially receive the plurality of toner color images from the photo-conductive member and to transfer the plurality of toner color images to a recording medium; a sheet transport belt having a surface contacting the intermediate transfer member and configured to transfer the plurality of toner color images to the recording medium; and a detecting mechanism configured to detect a traveling speed of the photo-conductive member, the detecting mechanism having a moving member located on a roller shaft of a detection roller which includes one support roller of the plurality of support rollers, the detection roller being located at a predetermined position away from a heat source such that the location of the detection roller is based on a location of the heat source, wherein the detection roller having a moment of inertia of substantially 35 (kgf·cm 2 ) or less.