US 12,253,810 B2
Image forming apparatus
Takehiro Ishidate, Tokyo (JP); Ryoichi Kawasumi, Ibaraki (JP); and Hiroki Takano, Saitama (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 30, 2023, as Appl. No. 18/192,902.
Claims priority of application No. 2022-064082 (JP), filed on Apr. 7, 2022.
Prior Publication US 2023/0324827 A1, Oct. 12, 2023
Int. Cl. G03G 15/043 (2006.01); G03G 21/20 (2006.01)
CPC G03G 15/043 (2013.01) [G03G 21/206 (2013.01); G03G 2215/0409 (2013.01); G03G 2221/1645 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An image forming apparatus that forms an image on a recording medium, the image forming apparatus comprising:
a photoconductor;
an exposure unit including a substrate provided with a plurality of chips each provided with a plurality of light emitting portions configured to emit light to expose the photoconductor, and a first duct configured to guide an airflow that cools the substrate from one side to another side in a longitudinal direction of the substrate along the substrate;
an IC mounted on the substrate, the IC configured to transfer image data to turn on the plurality of light emitting portions to the plurality of light emitting portions;
a fan configured to take in air from an outside of the image forming apparatus and generate an airflow that cools the substrate; and
a second duct configured to communicate with the first duct through a first opening portion located on the one side with respect to a center of the substrate in the longitudinal direction, and guide the airflow generated by the fan, the first duct guiding the airflow generated by the fan from the first opening portion to a second opening portion located at the another side with respect to the center of the substrate in the longitudinal direction,
and the IC being located between the center of the substrate in the longitudinal direction and the first opening portion.