Process cartridge, main cartridge, sub cartridge, and image forming apparatus

A main cartridge attachable and detachable to and from an apparatus body of an image forming apparatus, the main cartridge comprising:

• a process device configured to act on a photosensitive member;
• an attachment and detachment portion capable of attaching and detaching a sub cartridge containing developer;
• a moving member configured to be capable of moving between a first position for preventing, by the moving member contacting the apparatus body, the main cartridge from entering the inside of the apparatus body and a second position for allowing the main cartridge to enter the inside of the apparatus body;
• and
• a regulation member capable of moving between a regulation position for locking the moving member at the first position and an allowable position for allowing the moving member to move from the first position to the second position, and
• wherein the regulation member moves from the regulation position to the allowable position by attaching the sub cartridge to the attachment and detachment portion.

A sub cartridge attachable and detachable to and from a main cartridge attachable and detachable to and from an apparatus body of an image forming apparatus, the sub cartridge comprising:

• a developer containing portion configured to store developer to be supplied to the main cartridge;
• and
• a pressing portion capable of contacting a regulation member provided to the main cartridge,
• wherein the main cartridge includes a moving member configured to be capable of moving between a first position for preventing, by the moving member contacting the apparatus body, the main cartridge from entering the inside of the apparatus body and a second position for allowing the main cartridge to enter the inside of the apparatus body, and
• the regulation member is capable of moving between a regulation position for locking the moving member at the first position and an allowable position for allowing the moving member to move from the first position to the second position, and
• wherein the pressing portion presses the regulation member in the process of attaching the sub cartridge to the main cartridge and thereby the regulation member is moved from the regulation position to the allowable position.

An image forming apparatus configured to form an image on a recording medium, the image forming apparatus comprising:

• a main cartridge having a process device configured to act on a photosensitive member;
• a sub cartridge attachable and detachable to and from the main cartridge, and having a developer containing portion storing developer to be supplied to the main cartridge;
• and
• an apparatus body which the main cartridge can be attached to and detached from in a state where the sub cartridge is attached to the main cartridge,
• wherein the apparatus body includes,
• a stopping portion configured to prevent the main cartridge from being attached to the apparatus body in a state where the sub cartridge is removed, and
• wherein the main cartridge includes,
• a moving member configured to be capable of moving between a first position for preventing, by the moving member contacting the apparatus body, the main cartridge from entering the inside of the apparatus body and a second position for allowing the main cartridge to enter the inside of the apparatus body;
• and
• a regulation member capable of moving between a regulation position for locking the moving member at the first position and an allowable position for allowing the moving member to move from the first position to the second position, and
• wherein the sub cartridge is attached to the main cartridge and thereby the regulation member moves from the regulation position to the allowable position.