Tandem Type Photosensitive Unit and Image Forming Apparatus

A tandem type photosensitive unit comprising:

• a plurality of photosensitive drums provided in parallel with each other;
• a shaft provided on a central axis of each of the photosensitive drums;
• a first side plate provided on a first side of the photosensitive drums in an axial direction of the photosensitive drum, the first side plate being formed with a first through hole at a position opposing each photosensitive drum in the axial direction;
• a second side plate provided on a second side of the photosensitive drum in the axial direction so as to oppose the first side plate, the second side plate being formed with a second through hole at a position opposing each photosensitive drum in the axial direction;
• a first bearing member fitted into the first through hole;
• and
• a second bearing member fitted into the second through hole,
• wherein each of the photosensitive drums includes:
• a cylindrical drum main body;
• a flange member engaged with an end portion of the drum main body at the first side;
• and
• an earth member provided in the drum main body,
• wherein the shaft passes through the flange member, such that a first end portion of the shaft at the first side protrudes from the flange member toward the first side, and a second end portion of the shaft at the second side comes into contact with the earth member,
• wherein the first bearing member includes:
• a shaft support portion which supports the first end portion of the shaft;
• a flange support portion which supports the flange member;
• and
• a first flange portion which comes into contact with an inner side surface of the first side plate, and
• wherein the second bearing member includes:
• a second side support portion which supports a second end portion of the photosensitive drum at the second side;
• and
• a second flange portion which comes into contact with an outer side surface of the second side plate.