Cartridge having movable spacer for restricting movement of a first frame relative to a second frame

A cartridge detachably mountable to an image forming apparatus, the cartridge comprising:

• a photosensitive drum;
• a charging roller configured to charge the photosensitive drum;
• a first frame supporting the photosensitive drum and the charging roller;
• a developing roller configured to deposit toner onto the photosensitive drum;
• a second frame supporting the developing roller, the second frame being movable, relative to the first frame, between a developing position in which the toner is capable of being deposited onto the photosensitive drum from the developing roller and a spaced position in which at least a part of the developing roller is more spaced from the photosensitive drum than when the developing roller is in the developing position;
• a pressing unit including a spring and a force receiving portion capable of receiving an external force;
• and
• a spacer supported by the first frame or the second frame and contactable with the first frame and the second frame, the spacer being movable relative to the first frame and the second frame and movable between a first position restricting movement of the second frame, relative to the first frame, from the spaced position to the developing position and a second position allowing the second frame to move from the spaced position to the developing position,
• wherein the second frame includes a bearing member rotatably supporting the developing roller, and the spring is held by the bearing member,
• wherein the pressing unit further includes a movable member provided with a projection including the force receiving portion and supported by the bearing member so as to be movable relative to the bearing member between a third position and a fourth position,
• wherein the spring is provided between the movable member and the bearing member, and
• wherein, when the spacer is in the first position and the pressing unit receives the external force at the force receiving portion, the spring applies, to the bearing member, an urging force for urging the second frame toward the developing position by moving the movable member from the third position to the fourth position relative to the bearing member by reception of the external force at the force receiving portion such that the pressing unit applies to the second frame in the spaced position the urging force for urging the second frame toward the developing position.