Patent ID: 8224206

Claim:
An image forming apparatus, comprising: a photosensitive body on which an electrostatic latent image is to be formed; an exposure device to radiate light to the photosensitive body to form the electrostatic latent image; a developing device to adhere a developer to the photosensitive body to form a visible image; a transfer device to transfer the visible image formed on the photosensitive body onto a printing medium; a fusing unit comprising a heating roller to apply heat to the printing medium, a press roller to contact the heating roller to press the printing medium, a press lever to press any one of the heating roller and the press roller toward the other, an adjusting lever rotatably coupled to the press lever, an operating member to operate the adjusting lever to adjust the pressing force of the press lever, and a driving source to operate the operating member; an operating gear coupled to the operating member, the operating gear having gear teeth disposed only on a portion of its outer periphery; and a driving gear disposed between the driving source and the operating gear to transmit a driving force from the driving source to the operating gear, the driving gear having gear teeth disposed only on a portion of its outer periphery.