Image-forming apparatus including process cartridge and device-side terminal configured to contact process-side terminal

An image-forming apparatus comprising:

• a main casing;
• a drawer movable in a first direction between a first position inside the main casing and a second position outside the main casing;
• a plurality of process cartridges attachable to and detachable from the drawer, the plurality of process cartridges being arranged in the first direction in a state where the plurality of process cartridges are attached to the drawer, each of the plurality of process cartridges comprising:
• a photosensitive drum;
• a magnetic roller configured to supply toner to the photosensitive drum;
• a developing container for storing therein carrier;
• a conveying member positioned inside the developing container, the conveying member being configured to convey toner and carrier toward the magnetic roller;
• a toner sensor configured to output a detection signal corresponding to a concentration of toner in the developing container;
• a process memory for storing information about the process cartridge;
• and
• a process-side terminal for both outputting the detection signal of the toner sensor and outputting the information stored in the process memory;
• a controller;
• and
• a device-side terminal positioned inside the main casing, the device-side terminal being connected to the controller, the device-side terminal being configured to contact the process-side terminal,
• wherein the main casing has an opening through which the drawer is movable between the first position and the second position,
• wherein the image-forming apparatus further comprises a cover movable between an open position where the cover opens the opening and a closed position where the cover closes the opening,
• wherein the device-side terminal is movable between a contact position where the device-side terminal contacts the process-side terminal and a retracted position where the device-side terminal does not contact the process-side terminal,
• wherein the device-side terminal is in the retracted position when the cover is in the open position, and
• wherein the device-side terminal moves from the retracted position to the contact position in conjunction with movement of the cover from the open position to the closed position.