Patent ID: 8768202

Claim:
An image forming apparatus in which a cartridge that supports a photosensitive member is mounted to an image forming position, and which forms a latent image on the photosensitive member by exposure to form an image, the apparatus comprising: an exposure member that includes a light emitting element arranged in an array, and exposes the photosensitive member of the cartridge located in the image forming position in an exposure position; an openable and closable member that can be opened or closed with respect to a main body of the apparatus, and can mount the cartridge to the main body of the apparatus in a state of being opened with respect to the main body of the apparatus; a first moving member that is pressed and moved by the openable and closable member when the openable and closable member is opened, and switches the cartridge from a state where the cartridge is positioned in the image forming position to a state where the positioning is released; and a second moving member that is pressed and moved by the openable and closable member when the openable and closable member is opened, and moves the exposure member from the exposure position in an arrangement direction of the cartridge and the exposure member and thus moves the exposure member to a retracted position retracted from the exposure position, wherein, while the openable and closable member is being opened, when the first moving member switches the cartridge to the state where the positioning is released, a reaction force applied from the first moving member to the openable and closable member reaches a first peak, and when the second moving member moves the exposure member to the retracted position, a reaction force applied from the second moving member to the openable and closable member reaches a second peak, and timing of the first peak is different from timing of the second peak.