Cartridge including a drum-unit with a frame that includes particular arranged recess portion and through-hole

A cartridge comprising:

• a drum unit including a photosensitive drum and a frame supporting the photosensitive drum rotatably;
• and
• a developing unit including a developing roller configured to supply toner to the photosensitive drum, the developing unit being attachable to and detachable from the drum unit and attached to the drum unit,
• wherein, in a case where one end portion of the frame in a first direction, which is a rotational axis direction of the photosensitive drum, is referred to as a first end portion, and the other end portion of the frame is referred to as a second end portion,
• the drum unit includes:
• a first pressing member disposed at the first end portion and configured to press the developing unit so that the developing roller is brought into contact with the photosensitive drum;
• a second pressing member disposed at the second end portion and configured to press the developing unit so that the developing roller is brought into contact with the photosensitive drum;
• and
• a lever disposed at the second end portion and configured such that the developing unit is detached from the drum unit by turning the lever,
• wherein the frame includes:
• a first through-hole formed at the first end portion, penetrating the frame, and into which a part of the developing unit enters;
• a first recess portion recessed in a second direction that intersects the first direction and is away from the developing unit, at least a part of the first recess portion is provided in a region outside the first pressing member at the first end portion in the first direction, the first recess portion being adjacent to the first through-hole in the first direction;
• a second recess portion recessed in the second direction, at least a part of the second recess portion is provided in a region outside the second pressing member at the second end portion in the first direction;
• and
• a second through-hole formed between the first recess portion and the second recess portion in the first direction and penetrating the frame, and
• wherein, with respect to the first direction,
• the first pressing member is disposed at a position that does not overlap with a position of the first through-hole in the first direction,
• the first through-hole, the first recess portion, and the first pressing member are arranged in this order in a direction from the first end portion toward the second end portion, and
• the first recess portion, the second through-hole, and the second recess portion are aligned on an imaginary straight line extending in the first direction.