Patent ID: 8275285

Claim:
A process cartridge configured to be attached to a main body of an image forming apparatus in a detachable manner, the image forming apparatus including an exposing unit that forms an electrostatic latent image by irradiating a pattern light, and an intermediate transfer unit onto which a toner image is transferred, the process cartridge comprising: a photosensitive drum that is rotatably supported; a charging unit that uniformly charges the photosensitive drum; a developing unit that develops the electrostatic latent image formed on the photosensitive drum with toner to form a toner image on the photosensitive drum; a cleaning unit that cleans residual toner around the photosensitive drum after transferring the toner image onto the intermediate transfer unit; and a projection at a side of the process cartridge which guides the process cartridge in a vertical direction during insertion into the image forming apparatus, wherein the charging unit, the developing unit, and the cleaning unit are arranged next to the photosensitive drum in an enclosure, the enclosure has an opening through which a developing roller of the developing unit can be seen, an extended line passing through a tangent line to an outer circumference of the developing roller and a wall of a first end of the enclosure in an axial direction of the developing roller does not intersect with a wall of a second end of the enclosure, the opening extends to a top of the enclosure, and a first concave portion is formed on a first surface of the enclosure extending upwards next to the opening and a second concave portion is formed on a second surface of the enclosure on a side opposite to the first surface to be used as a handle.