Patent ID: 8041286

Claim:
An image forming apparatus comprising: a body including an image forming unit and a drive source; a paper feeding unit comprising: a paper feeding cassette detachably coupled to the body, and including a paper loading tray and a pivotally rotatable lifting member to lift or lower the paper loading tray; and a pickup roller assembly installed above the paper loading tray in an upwardly and downwardly movable manner to pick up a sheet of paper stored in the paper feeding cassette, wherein the drive source provides power to be transmitted to the lifting member and the pickup roller assembly; a power intermittence device to intermit the power to be transmitted from the drive source to the lifting member; a safety lever having a first end connected to the pickup roller assembly and to move according to a movement of the pickup roller assembly to control the power intermittence device; and a power transmission device to transmit the power transmitted through the power intermittence device to the lifting member, wherein the power transmission device comprises at least one worm gear.