| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming device in which a rotation driving force of a rotation driving source can be transmitted to a black development roller, or the transmission can be blocked, while the a rotation driving source can be used as a driving source for another member. <P>SOLUTION: In a first mode, both of a third development transmission gear 36 and a black development gear 25 are meshed with a first intermediate gear 37. In a second mode, the meshing of the black development gear 25 and the first intermediate gear 37 is released. The rotation center of the first intermediate gear 37 is arranged on the upstream side in a moving direction of gear teeth of the black development gear 25 on a line section connecting the rotation center of the third development transmission gear 36 and the rotation center of the black development gear 25. Consequently, when the meshing of the black development gear 25 and the first intermediate gear 37 is released, the first intermediate gear 37 is easily released from the black development roller 25. <P>COPYRIGHT: (C)2013,JPO&INPIT |
