US 11,675,310 B2
Image forming apparatus to cool a circuit board inside a duct
Shigeo Doi, Ibaraki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 7, 2021, as Appl. No. 17/544,770.
Claims priority of application No. JP2020-207102 (JP), filed on Dec. 14, 2020.
Prior Publication US 2022/0187764 A1, Jun. 16, 2022
Int. Cl. G03G 21/00 (2006.01); G03G 21/20 (2006.01); G03G 15/00 (2006.01)
CPC G03G 21/206 (2013.01) [G03G 15/80 (2013.01); G03G 2221/1645 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An image forming apparatus to form an image on a sheet, the image forming apparatus comprising:
a supporting frame configured to support a sheet conveying unit configured to convey the sheet, including a rear sheet metal disposed more rearward than the sheet conveying unit in a front-back direction of the image forming apparatus, and having an opening;
a rear cover included in an exterior cover, disposed more rearward than the rear sheet metal in the front-back direction, configured to cover at least a part of the rear sheet metal, and having an exhausting port for exhausting air;
a duct including an intake for taking in air and an outlet for exhausting air inside the duct and provided inside the exterior cover such that (i) the duct connects the intake and the outlet, (ii) the intake is located more frontward than the rear sheet metal in the front-back direction, (iii) the duct passes through the opening, and (iv) the outlet is connected to the exhausting port;
a circuit board configured to drive the sheet conveying unit and disposed inside the duct between the rear sheet metal and the rear cover; and
a fan configured to generate an air flow from the intake to the outlet to cool the circuit board inside the duct.