Patent ID: 9201370
Filing Date: 2015-12-01
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a main body; an endless belt; a plurality of photosensitive drums that are disposed in confrontation with the endless belt and are arranged in a first direction, each photosensitive drum having an axis extending in a second direction perpendicular to the first direction; a mode setting unit that sets the image forming apparatus to one of a monochrome printing mode and a color printing mode; a contacting/separating mechanism that controls at least one of the plurality of photosensitive drums to contact or separate from the endless belt in accordance with a set mode; a transmitting mechanism that selectively transmits drive power to the plurality of photosensitive drums; a plurality of coupling members that correspond respectively to the plurality of photosensitive drums, each coupling member being coaxially disposed with a corresponding photosensitive drum and being selectively coupled to the corresponding photosensitive drum; and a translation cam provided with a plurality of cam parts, the plurality of cam parts being provided in one-to-one correspondence with the plurality of coupling members, each cam part being configured to uncouple a corresponding coupling member from the corresponding photosensitive drum when the contacting/separating mechanism controls the corresponding photosensitive drum to separate from the endless belt, the translation cam being linearly movable relative to the main body in a predetermined direction.