Patent ID: 7995951
Filing Date: 2011-08-09
Classification: G03G

Abstract:
1. An image forming apparatus having a hitting surface, the image forming apparatus comprising: a Y-color image forming unit that has a Y-color image carrier holding a yellow toner image, and a Y-color coupling member being arranged corresponding to the Y-color image carrier and transmitting drive force to the Y-color image carrier; a M-color image forming unit that has a M-color image carrier holding a magenta toner image, and a M-color coupling member being arranged corresponding to the M-color image carrier and transmitting drive force to the M-color image carrier; a C-color image forming unit that has a C-color image carrier holding a cyan toner image, and a C-color coupling member being arranged corresponding to the C-color image carrier and transmitting drive force to the C-color image carrier; a K-color image forming unit that has a K-color image carrier holding a black toner image, and a K-color coupling member being arranged corresponding to the K-color image carrier and transmitting drive force to the K-color image carrier; a Y-color drive coupling member that is connected to the Y-color coupling member and drives the Y-color coupling member; a M-color drive coupling member that is connected to the M-color coupling member and drives the M-color coupling member; a C-color drive coupling member that is connected to the C-color coupling member and drives the C-color coupling member; a K-color drive coupling member that is connected to the K-color coupling member and drives the K-color coupling member; a first movable plate that is provided with a plurality of rings which are rotated by sliding the first movable plate; and a second movable plate that is provided with a ring which is rotated by sliding the second movable plate, wherein the image forming apparatus is configured such that the Y-color drive coupling member, the M-color drive coupling member and the C-color drive coupling member are interconnected to and released from the Y-color coupling member, the M-color coupling member and the C-color coupling member, respectively, by rotating the plurality of the rings of the first movable plate simultaneously, and the K-color drive coupling member is interconnected to and released from the K-color coupling member by rotating the ring of the second movable plate, wherein the first movable plate with the plurality of rings causes a pin of a shaft to make contact onto the hitting surface of the image forming apparatus, the contact driving at least of one the image forming units.