IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To drive a developing roller and a photoreceptor roller by a single motor without using an intermediate gear. SOLUTION: This image forming device has a photoreceptor motor pulley 34B and a developing motor gear 32 fixed to a rotary shaft of a commonly using motor 37; a stepped pulley 38B rotatably arranged by extending a belt 39A between it and the photoreceptor motor pulley 34B; a photoreceptor roller driving pulley 36B in which a belt 39B is extended between it and the stepped pulley 38B and which is connected with a photoreceptor roller 7 and rotates the photoreceptor roller 7 by torque of the commonly using motor 37 transmitted through the belt 39A, stepped pulley 38B and belt 39B from the photoreceptor motor pulley 34B; and a developing roller driving gear 33 which meshes with the developing motor gear 32 and is connected with a developing roller 16 and rotates the developing roller 16 by the torque of the commonly using motor 37 transmitted from the developing motor gear 32.