Abstract: A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.

Abstract: A positioning device to position a first member relative to a second member includes two convex parts disposed on a side of the first member and apart from each other; and positioning portions disposed on a side of the second member so as to contact the convex parts, each of which is disposed apart from each other and opposed to the two convex parts. The positioning portions includes two planar portions disposed substantially perpendicularly relative to a direction to allow the first member to approach the second member; and a slanted portion disposed in the vicinity of one of the two planar portions and angled with respect to a direction to allow the first member to approach the second member. The second member is an endless belt, on which an image pattern for detection is formed, and the first member is a sensor to detect the image pattern formed on the endless belt.

Abstract: A process cartridge includes an image carrier unit which is equipped with an image carrier, on which an electrostatic latent image is formed, and a developer supply unit which supplies developer to the image carrier unit 11. The image carrier unit and the developer supply unit are configured to be attached and detached with respect to an apparatus main body in which the units are accommodated. Electrical contacts are provided to form electrical connection between the image carrier unit 11 and the developer supply unit 9 in a mounted state in the apparatus main body.

Abstract: A process cartridge includes an image carrier unit which is equipped with an image carrier, on which an electrostatic latent image is formed, and a developer supply unit which supplies developer to the image carrier unit 11. The image carrier unit and the developer supply unit are configured to be attached and detached with respect to an apparatus main body in which the units are accommodated. Electrical contacts are provided to form electrical connection between the image carrier unit 11 and the developer supply unit 9 in a mounted state in the apparatus main body.