Patent ID: 7321740

Claim:
An image forming apparatus comprising: a photosensitive drum, on which an electrostatic latent image is formed; at least one developing cartridge including a developing roller which develops a toner image by supplying a developer to the electrostatic latent image; and a transfer unit which transfers the toner images onto a print medium, wherein the at least one developing cartridge comprises: a first frame on which the photosensitive drum is arranged; a second frame which is pivotably coupled to the first frame and coupled to the developing roller; a first elastic element which provides an elastic force biasing the second frame in the direction towards the first frame; and gap maintaining elements which limit the pivoting of the second frame so that a developing gap is maintained, and the developing roller and the gap maintaining elements are arranged on the second frame to move in a direction opposite to a pivoting direction of the second frame.