Electrophotographic image forming apparatus with movable light emitting member support

An electrophotographic image forming apparatus for forming an image on a recording medium in a state in which a cartridge, which has a process member configured to act on a photosensitive drum, is removably mounted to a main body of the apparatus, the image forming apparatus comprising:

• a mounting portion to which the cartridge is removably mounted, the mounting portion being provided in the main body of the apparatus;
• a first member and a second member composing the main body of the apparatus, one of the first member and the second member being openable and closable with respect to the other of the first member and the second member, the cartridge being passed through an opening formed by one of the first member and the second member being opened with respect the other so that the cartridge is mounted to the mounting potion and removed from the mounting potion;
• a light emitting member having multiple light emitting elements which are provided side- by-side along a direction of an axis of the photosensitive drum, and which emit light according to image information in order to subject the photosensitive drum to exposure according to the image information;
• a support member configured to support the light emitting member, the support member being movable between an exposure position, at which the light emitting elements emit the light to subject the photosensitive drum to the exposure, and a retracted position, at which the light emitting member is retracted from the exposure position and located within the first member;
• an elastic member disposed between the light emitting member and the support member to make the light emitting member movable with respect to the support member;
• and
• an interlocking member configured to move the support member from the exposure position to the retracted position in association with a first operation of opening one of the first member and the second member with respect to the other, and to move the support member from the retracted position to the exposure position in association with a second operation of closing one of the first member and the second member with respect to the other,
• wherein the cartridge is movable in a direction perpendicular to the direction of the axis of the photosensitive drum so as to be removably mountable to the main body of the apparatus, and
• wherein, when the support member is moved from the retracted position to the exposure position by the interlocking member, the elastic member presses the light emitting member toward the photosensitive drum to determine a position of the light emitting member with respect to the photosensitive drum.