초록 ▼

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus for forming an image on a recording material, includes an electrophotographic photosensitive drum; process mechanism(s) actable on the drum; and a projection provided at a longitudinal end o

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus for forming an image on a recording material, includes an electrophotographic photosensitive drum; process mechanism(s) actable on the drum; and a projection provided at a longitudinal end of the drum, for engagement with a twisted hole provided in the main assembly of the apparatus, when the process cartridge is mounted to the main assembly, preferably by movement of the hole in interrelation with an operable member. When a driving rotatable member in the main assembly is rotated with the projection engaged with the hole, rotational driving force is transmitted to the drum through the projection/hole engagement. The projection is drawn into the hole, and the process cartridge frame is contacted longitudinally to a regulating member in the main assembly of the apparatus to longitudinally position the drum relative to the main assembly.

대표청구항 ▼

[ What is claimed is:] [1.] A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein said main assembly includes a motor, a driving rotatable member for receiving a driving force from said motor, and a hole defined by twisted surfaces, sa

[ What is claimed is:] [1.] A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein said main assembly includes a motor, a driving rotatable member for receiving a driving force from said motor, and a hole defined by twisted surfaces, said hole being substantially coaxial with said driving rotatable member, said process cartridge comprising:a cartridge frame;an electrophotographic photosensitive drum provided in said cartridge frame;process means actable on said electrophotographic photosensitive drum; anda projection provided at a longitudinal end of said electrophotographic photosensitive drum, for engagement with said hole;wherein, when said driving rotatable member is rotated with said projection engaged with said hole, a rotational driving force is transmitted from said driving rotatable member to said photosensitive drum through engagement between said hole and said projection, and said projection is drawn into said hole, and said cartridge frame is contacted, in a longitudinal direction of said electrophotographic photosensitive drum, to a regulating member in the main assembly of said apparatus to position said electrophotographic photosensitive drum relative to the main assembly of said apparatus in the longitudinal direction.