Image forming apparatus having a driving force transmission rotating body which transmits a driving force to a driving force receiving portion of a driven member
AssigneeCanon Kabushiki Kaisha
InventorTakeshi Tsukahara
Life of this patent
Estimating the term…
Abstract
Provided is a technique for suppressing the occurrence of density non-uniformities in an image formed on a sheet. An image forming apparatus, which forms an image on a recording material by transmitting driving force to a cartridge, includes: a frame having a positioning portion which positions the cartridge by contacting the attached cartridge; a driving force transmission rotating body which transmits driving force by engaging with a driving force receiving portion of the driven unit; and a circumferential surface which is provided in one portion of the frame and rotatably supports the driving force transmission rotating body.
Claims11
An image forming apparatus in which a cartridge is attached and which forms an image on a recording material by transmitting a driving force to the cartridge, the image forming apparatus comprising:
- a driving force transmission rotating body which transmits the driving force by engaging with a driving force receiving portion provided at a longitudinal end of the cartridge;
- and
- a frame, made from a metallic material, the frame having:
- a main body portion,
- a contacting portion, connected to the main body portion, and configured to contact the cartridge to position the cartridge in the frame in a direction that is perpendicular to a longitudinal direction of the cartridge,
- a cylindrical projecting portion, formed by a burring process, the cylindrical projecting portion projecting towards the driving force receiving portion from the main body portion of the frame in the longitudinal direction of the cartridge, a central axis of the cylindrical projecting portion coinciding with a rotational center axis of the driving force transmission rotating body, and
- a circumferential surface,. provided on an inner circumferential surface of the cylindrical projecting portion, and rotatably supporting the driving force transmission rotating body by contacting the driving force transmission rotating body,
- wherein the contacting portion and the cylindrical projecting portion do not overlap in a plane that is perpendicular to the central axis of the cylindrical projecting portion.
Dependencies are inferred from the claim text.