Patent ID: 8750754

Claim:
An image forming apparatus comprising: a body; a developing device detachably mounted in the body; a cover to be opened away from or closed to an upper surface of the body; and a drive device provided at a side of the developing device so as to be coupled with or released from the developing device, the drive device being moved in linkage with opening/closing operation of the cover, wherein the developing device includes a plurality of driven coupling members to be rotated upon receiving drive power from the drive device, wherein the drive device includes a plurality of driving coupling members engaged with the plurality of driven coupling members in a one to one ratio according to an opening/closing operation of the cover, wherein at least one driving coupling member of the plurality of driving coupling members is located at a position deviated from a straight line on which the remaining driving coupling members are located, and wherein the drive device includes a plurality of cam members to horizontally move the plurality of driving coupling members, a rack member to rotate the plurality of cam members, and a pinion member to linearly move the rack member.