Patent ID: 8244158

Claim:
An image forming apparatus comprising: an image forming unit that includes a photosensitive drum for carrying a developer image, the image forming unit configured to form an image on a recording sheet by transferring the developer image of the photosensitive drum onto the recording sheet; a motor that is configured to rotate forwardly and reversely; a discharging roller to which a driving force is transferred from the motor, the discharging roller configured to discharge the recording sheet outside of an apparatus main body when the motor rotates forwardly, the discharging roller configured to draw the recording sheet into the apparatus main body when the motor rotates reversely; a one way clutch that transfers the driving force from the motor to the photosensitive drum when the motor rotates forwardly, the one way clutch blocking a transfer of the driving force from the motor to the photosensitive drum when the motor rotates reversely; a returning roller that returns the recording sheet drawn by the discharging roller to the image forming unit; a rotation direction converting mechanism that transmits the driving force from the motor to the returning roller so as to rotate the returning roller in a certain direction regardless of a rotation direction of the motor; and a time lag mechanism that includes a pair of engaging portions disposed with a gap therebetween, wherein, when the rotation direction of the motor is switched, each of the engaging portions engages with each other after a predetermined time, thereby delaying the transfer of the driving force from the motor to the returning roller.