Patent ID: 6226478
Filing Date: 2001-05-01
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 recess formed substantially at a center of said rotatable member, said recess having a polygonal cross-section;a projection provided at a longitudinal end of said photosensitive drum, wherein when said driving rotatable member rotates with said recess and projection engaged with each other, a rotational driving force is transmitted from said rotatable member to said photosensitive drum through said recess and said projection with said projection being pulled into said recess, wherein a free end of said projection and a bottom surface of said recess contact each other so that said photosensitive drum is positioned in place in a longitudinal direction of said photosensitive drum relative to the main assembly.