Patent ID: 7751762

Claim:
A transfer device, comprising: an intermediate transfer belt provided to extend in an arranged direction of a plurality of photosensitive drums; primary transfer rollers each configured to transfer a toner image formed on a corresponding one of the plurality of photosensitive drums to the intermediate transfer belt and being rotatably supported by a movable member including an abutting portion which regulates a position of the primary transfer roller, wherein each of the primary transfer rollers is configured to be moved between a first position causing the intermediate transfer belt to be in contact with the photosensitive drums and a second position causing the intermediate transfer belt to be separated from the photosensitive drums; a plate connected to the movable member via a spring, wherein the plate is configured to move in a direction substantially parallel to a suspension direction of the intermediate transfer belt to move the spring to rotate the movable member around a first axis; and an abutted member positioned above the movable member and including an abutted surface on which the abutting portion is abutted in the first position and which is configured to regulate a positional deviation of the primary transfer rollers in a direction perpendicular to the suspension direction of the intermediate transfer belt, wherein a center distance between a center axis of each one of the photosensitive drums and a center axis of a corresponding one of the primary transfer rollers at the first position is set to be larger than a sum of radiuses of the each one of the photosensitive drums and the corresponding one of the primary transfer rollers.