Image forming apparatus including drive source

An image forming apparatus comprising:

• an image forming portion including:
• a photosensitive member that is rotatably supported about a rotation shaft extending in a first direction and bears a toner image;
• and
• a transfer member that transfers the toner image to a sheet;
• a fixing portion configured to fix the toner image transferred by the transfer member to the sheet;
• a reverse conveyance portion configured to reverse and convey the sheet conveyed by the fixing portion;
• a conveyance path configured to guide the sheet reversed by the reverse conveyance portion toward the transfer member again;
• a conveyance portion configured to convey the sheet in the conveyance path;
• a drive source configured to drive the photosensitive member and the conveyance portion;
• a drive input portion configured to input a driving force transmitted from the drive source to the conveyance portion, the drive input portion being attached to the conveyance portion;
• and
• a fan configured to cool the drive source by blowing air to the drive source,
• wherein the drive source is disposed between the transfer member and the fixing portion in a second direction parallel to a sheet conveyance direction in the conveyance portion,
• the drive input portion is disposed so that (i) a position of the drive input portion overlaps a position of the drive source with respect to the first direction, (ii) the position of the drive input portion overlaps the position of the drive source with respect to a third direction orthogonal to both of the first direction and the second direction, and (iii) the position of the drive input portion does not overlap the position of the drive source with respect to the second direction,
• the drive source includes:
• a rotor portion that generates a driving force;
• an output shaft that rotates together with the rotor portion;
• and
• a drive transmission member fixed to the output shaft,
• the image forming apparatus further comprises:
• a first side plate configured to support the drive source;
• and
• a second side plate disposed on a side opposite to the first side plate across the conveyance path in the first direction,
• the drive transmission member is disposed on a side opposite to the second side plate with respect to the first side plate in the first direction, and
• the fan is disposed between the first side plate and the second side plate in the first direction, and is disposed below the fixing portion and the conveyance path.