An image forming apparatus includes: a photoconductor that rotates about a first axis; an exposure portion that includes a substrate that includes a plurality of light emitting portions for exposing a surface of the photoconductor, and a support portion for supporting the substrate, and that moves between an exposure position where the photoconductor is exposed and a retracted position where the photoconductor is retracted from the exposure position; and a rotational member that has a second axis along the first axis, and that moves the exposure portion between the retracted position and the exposure position by rotation about the second axis.

A process unit includes a rotatable image bearer, an optical writing head to expose the image bearer within an maximum exposure range in an axial direction of the image bearer, a developer bearer, spacers disposed in axial end portions of the image bearer to determine a position of the optical writing head relative to the image bearer and slidingly contact the image bearer, a cleaner disposed downstream from the developer bearer in an image bearer rotation direction, and a remover to slidingly contact the axial end portion of the image bearer to remove a substance adhering thereto. In the axial direction, inner ends of the spacers are positioned inside a toner layer range of the developer bearer extending beyond a largest sheet width. The remover is disposed downstream from the cleaner and crossing a line extending from the inner end of the spacer perpendicularly to the axial direction.

An optical scanning apparatus includes a polygonal mirror configured to deflect a light beam emitted from a light source such that the laser beam scans a member to be scanned, a drive motor configured to rotate the polygonal mirror, aboard on which the polygonal mirror and the drive motor are mounted, an installation portion where the board is installed, a rubber member provided between the board and the installation portion, and an adjustment unit configured to position on the board with respect to the installation portion and to adjust inclination of the board with respect to the installation portion by deforming the rubber member.

An image forming apparatus, to which a supply container storing a developer is detachably attachable and which forms an image on a recording material, includes a photosensitive member that rotates, an optical box, a developer bearing member, and a developer container including a supply port for receiving the developer to be supplied from the supply container. The optical box irradiates the photosensitive member with light and forms an electrostatic latent image on the photosensitive member. The developer bearing member bears the developer and develops the electrostatic latent image by supplying the developer to the photosensitive member. The developer container stores the developer to be borne by the developer bearing member. When viewed in a rotation axial direction of the photosensitive member, a region where the optical box is located and at least a part of a region where the supply port is located overlap each other in a horizontal direction.

An image forming apparatus includes: a photoconductor that rotates about a first axis; an exposure portion that includes a substrate that includes a plurality of light emitting portions for exposing a surface of the photoconductor, and a support portion for supporting the substrate, and that moves between an exposure position where the photoconductor is exposed and a retracted position where the photoconductor is retracted from the exposure position; and a rotational member that has a second axis along the first axis, and that moves the exposure portion between the retracted position and the exposure position by rotation about the second axis.

An image forming apparatus includes a housing, an exposure device attached to and detachable from the housing, an insertion slot on the housing for the exposure device, a positioning member disposed at a position higher than the insertion slot, the positioning member having an inclined plane, and space that appears under the exposure device when the exposure device is attached to the prescribed position. In the image forming apparatus, the positioning member guides the exposure device to a prescribed position of the exposure device.

An image forming device includes a photoconductive body, an exposure unit configured with a plurality of light emitting elements aligned in a predetermined direction, the exposure unit being adopted to expose the photoconductive body to light emitted by the light emitting elements, a frame configured to support both sides of the exposure unit in the predetermined direction, the frame having a reference portion configured to position the exposure unit in the predetermined direction in contact with an end of the exposure unit in the predetermined direction, and a pressing member provided to one of the frame and the exposure unit, the pressing member being configured to press the end of the exposure unit against the reference portion.

An image forming apparatus includes a photoconductive member and an exposure unit. The exposure unit has a supporting frame made of resin, a holding case attached to the supporting frame, a plurality of emitting elements and a lens array held by the holding case, and a grounded metal wire. The holding case is made of resin and elongated in a longitudinal direction. The photoconductive member is configured to be exposed to light emitted by the plurality of light emitting elements and converged by the lens array. The supporting flame holds the metal wire such that the metal wire extends in the longitudinal direction and faces the holding case.

A structure in which a shutter is moved in a first direction by a motor, an opening is provided in the shutter, and the shutter is moved in a second direction using an elastic force of a spring connected to an upper cover of a light scanning device and an inside wall at the opening of the shutter increases the size of the structure of the shutter and the structure of the light scanning device due to the position of the spring. Therefore, a recess is provided in an opposing surface of a cover opposing a shutter, and a spring for sliding the shutter is connected to a connection portion provided at the recess. The recess is provided at a side opposite to the light source units with a polygon mirror being interposed therebetween.

An image forming device capable of providing precise positional relationship between an exposure unit and a photosensitive body. The exposure unit having an exposure head elongated in a longitudinal direction and having light emitting sections arrayed in the longitudinal direction. The light elements emit light in an optical axis direction. A frame supports the photosensitive body. A positioning protrusion protrudes in the optical axis direction from one of the frame and the exposure unit. A remaining one of the frame and the exposure unit is formed with a positioning part engageable with the positioning protrusion. A biasing unit provides a biasing force that ensures engagement between the positioning protrusion and the positioning part.