Patent ID: 7247109
Filing Date: 2007-07-24
Classification: B41J,F16H

Abstract:
1. A pulley fixing apparatus for an image forming apparatus including a frame, a driving motor, and a power-transmitting belt driven by the driving motor and a driving pulley, the pulley fixing apparatus comprising: a pulley fixing part rotatably fixing a driven pulley on the frame; a sliding part movably supporting the pulley fixing part on the frame; and an automatic tension adjusting part including an elastic pulling spring disposed between the pulley fixing part and the frame to elastically bias the pulley fixing part in a first direction and impart a predetermined tension to the power-transmitting belt, wherein: the pulley fixing part comprises a first fixing portion; the frame comprises a second fixing portion arranged between the first fixing portion and the driven pulley; and the elastic pulling spring has one end fixed at the first fixing portion and another end fixed at the second fixing portion to push the driven pulley outwardly from the second fixing portion of the frames, wherein: the sliding part comprises a slide protrusion positioned at the pulley fixing part; and the frame has an L-shaped protrusion guide hole positioned to support, receive and guide a projection of the slide protrusion.