In a conventional image-forming device, such as a laser printer, having a main device body, a process cartridge including a photosensitive drum and a developer unit is detachably mounted in the main device body. An access opening is formed in a prescribed surface of the main device body, while a cover is disposed on the main device body for exposing and covering the access opening. This cover is rotatably supported about a shaft extending along the prescribed surface of the main device body. By rotating the cover open about the shaft, the access opening is exposed, enabling a user to linearly remove a process car-ridge from or mount a process cartridge into the main device body through the access opening. When the cover is closed about the shaft, the cover covers the access opening.
However, in an image-forming device having this construction, the cartridge cannot be mounted in or removed from the main device body unless the cover is opened wide. To open the cover wide, a large space is needed around the periphery of the main device body. Hence, the image-forming device occupies a greater space than the space required for installation, resulting in restrictions on installation locations.
In view of the foregoing, it is an object of the present invention to provide an image-forming device and a cartridge mounted in the image-forming device that are capable of Increasing the flexibility of choosing an installation location.