Patent attributes
An image forming apparatus includes an image bearing member; a developing device including a developer carrying member for supplying the developer to the image bearing member, a developer feeding member, provided rotatably in a developing container, first and second driving force receiving members, provided at opposite end portions of the developer carrying member, for driving the developer carrying member and the developer feeding member, respectively; a first and second drive inputting members, for inputting drive to the first and second driving force receiving members, respectively. Directions, toward and away from the image bearing member, of forces are applied to abutment members, which determine a gap between the image bearing member and the developer carrying member, at the time when the drives are inputted to the first driving force receiving member and the second driving force receiving member, respectively.