Image forming apparatus that cools an exposure device

An image forming apparatus comprising:

• a rotatable photoconductor;
• a charging portion configured to charge a surface of the photoconductor;
• an exposure portion including a substrate on which a plurality of chips each including a plurality of light emitting portions configured to emit light for exposing the photoconductor is mounted, and a support portion configured to support the substrate, the exposure portion being movable between an exposure position, where a distance between a rotary axis of the photoconductor and a light emission surface of the exposure portion is a first distance, and a retracted position, where the distance between the rotary axis of the photoconductor and the light emission surface of the exposure portion is a second distance greater than the first distance;
• a developing portion configured to develop a latent image formed on the surface of the photoconductor with toner;
• a fan configured to generate an airflow for cooling the exposure portion;
• and
• a duct portion engaged with the exposure portion;
• a first support portion configured to support the developing portion;
• and
• a second support portion configured to support the charging portion,
• wherein the duct portion, the first support portion, and the second support portion form a part of a duct configured to communicate with the fan and to communicate with the exposure portion, the duct guiding the airflow generated by the fan to the substrate, and
• wherein a space between the duct portion and the second support portion and a space between the duct portion and the first support portion are sealed by a sealing member.