Patent ID: 6501927
Filing Date: 2002-12-31
Classification: F16D,G03G

Abstract:
An electrophotographic image forming apparatus for forming an image on a recording material, comprising:an electrophotographic photosensitive drum; charging means for charging said photosensitive drum; developing means for developing a latent image formed on said photosensitive drum into a toner image; transfer means for transferring the toner image onto the recording material; fixing means for fixing the toner image on the recording material; a motor; a driving rotatable member for receiving a driving force from said motor; a projection provided substantially at a center of said driving rotatable member, said projection having a polygonal cross-section; a hole formed at a longitudinal end of said photosensitive drum, said hole having a polygonal cross-section wherein when said driving rotatable member rotates with said hole and said projection engaged with one another, a rotational driving force is transmitted from said driving rotatable member to said photosensitive drum through said hole and said projection with said hole is pulled into said projection, wherein an end portion of a shaft having said hole and said driving rotatable member are contacted to each other so that said electrophotographic photosensitive drum is positioned in place in a longitudinal direction of said electrophotographic photosensitive drum relative to the main assembly, and said shaft functions to rotatably support said photosensitive drum; and moving means for imparting relative movement between said hole and said projection in a longitudinal direction of said electrophotographic photosensitive drum to engage said projection with said hole.