Tandem-Type Process Unit Removably Loaded In Image Forming Device

An image forming device, comprising:

• a plurality of process cartridges aligned in a first direction, each of the plurality of process cartridges including a first side and a second side opposite to the first side in a second direction perpendicular to the first direction, each of the plurality of process cartridges having a photosensitive drum configured to rotate about an axis extending in the second direction and a cartridge electrode provided on the first side;
• a main unit having a plurality of main-unit electrodes, each of the main-unit electrodes being configured to connect to a corresponding cartridge electrode for supplying electric power to the corresponding cartridge electrode;
• and
• a unit frame having a first lower supporting plate, a second lower supporting plate, a first upper supporting plate, and a second upper supporting plate, the first lower supporting plate supporting the first sides of the plurality of process cartridges, the second lower supporting plate supporting the second sides of the plurality of process cartridges, the first upper supporting plate supporting the first sides of the plurality of process cartridges and arranged upward from the first lower supporting plate, the second upper supporting plate supporting the second sides of the plurality of process cartridges and arranged upward from the second lower supporting plate, wherein
• the first and second lower support plates are positioned at a first distance from each other, and
• the first and second upper support plates are positioned at a second distance from each other, and the second distance is longer than the first distance,
• the unit frame is configured to move between a first position at which the plurality of process cartridges is loaded in the main unit and a second position at which the plurality of process cartridges is removable from the main unit.