An image forming apparatus includes: a rotatable photoconductor; an exposure portion including a substrate on which a plurality of chips each including a plurality of light emitting portions that emit light for exposing the photoconductor is mounted, and a support portion configured to support the substrate; a fan configured to generate an airflow for cooling the exposure portion; and a duct configured to communicate with the fan and to communicate with the support portion to guide the airflow generated by the fan to the substrate.

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, 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 photosensitive drum, an LED unit, and a housing. The LED unit is configured to expose the photosensitive drum. The LED unit has a light emitting surface. The housing includes a discharge portion and a discharge tray. The discharge portion has a discharge opening configured to discharge a sheet. The sheet discharged from the discharge opening is placed on the discharge tray. The discharge tray has a cleaning opening for cleaning the light emitting surface of the LED unit. The LED unit is configured to move between: a first position at which the LED unit exposes the photosensitive drum; and a second position at which the light emitting surface is closer to the cleaning opening than a state where the LED unit is located at the first position.

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 including a photoreceptor unit, a first terminal, a stage, a first protrusion, a second protrusion, a slider, and an exposure device. The stage moves from a first position closer to the photoreceptor to a second position farther from the photoreceptor in a second direction than the first position so that the second terminal is fitted to the first terminal. The slider includes a first position regulation portion and a second position regulation portion at positions separated from each other in the third direction. A thickness of the first position regulation portion in the first direction is thinner than a thickness of the second position regulation portion in the first direction. The slider slides with the first protrusion between a base portion and the second protrusion and includes a guide portion. The exposure device is supported by the stage.

An image forming apparatus including a photoreceptor unit, a first terminal, a stage, a first protrusion, a second protrusion, a slider, and an exposure device. The stage moves from a first position closer to the photoreceptor to a second position farther from the photoreceptor in a second direction than the first position so that the second terminal is fitted to the first terminal. The slider includes a first position regulation portion and a second position regulation portion at positions separated from each other in the third direction. A thickness of the first position regulation portion in the first direction is thinner than a thickness of the second position regulation portion in the first direction. The slider slides with the first protrusion between a base portion and the second protrusion and includes a guide portion. The exposure device is supported by the stage.

According to one embodiment, in an image forming apparatus, a frame that supports a transfer belt conveying a toner image in a conveyance direction and image forming units aligned along the transfer belt is provided with a dowel hole between the image forming units in a direction parallel to the conveyance direction and is also provided with an elongated hole having a long axis in a direction parallel to the conveyance direction, a dowel between the exposure units of a chassis supporting exposure units in a direction parallel to the conveyance direction is fitted to the dowel hole, and another dowel is inserted into the elongated hole.

An image forming apparatus includes a photosensitive drum, an LED unit, and a housing. The LED unit is configured to expose the photosensitive drum. The LED unit has a light emitting surface. The housing includes a discharge portion and a discharge tray. The discharge portion has a discharge opening configured to discharge a sheet. The sheet discharged from the discharge opening is placed on the discharge tray. The discharge tray has a cleaning opening for cleaning the light emitting surface of the LED unit. The LED unit is configured to move between: a first position at which the LED unit exposes the photosensitive drum; and a second position at which the light emitting surface is closer to the cleaning opening than a state where the LED unit is located at the first position.

An image forming apparatus is provided which forms an image on a recording medium. The image forming apparatus includes a housing; a plurality of photosensitive members which bear respective toner images; a scanning unit which scans surfaces of the plurality of photosensitive members by laser light in accordance with image information; and a recording medium container which contains the recording medium and is detachably mounted in the housing. The scanning unit is disposed under the plurality of photosensitive members and over the recording medium container in the vertical direction, and other components are not interposed between the scanning unit and the recording medium container in the vertical direction.