Electrophotographic photosensitive drum supporting apparatus, process cartridge and electrophotographic image forming apparatus

A process cartridge detachably mountable on a main body of an electrophotographic image forming apparatus, said process cartridge comprising:

• an electrophotographic photosensitive drum;
• a plurality of process means provided in contact with said electrophotographic photosensitive drum;
• a first supporting member having a first hole portion, a first inclined surface, and a second inclined surface, said first and second inclined surfaces being inclined with respect to an imaginary plane passing through an axis of said electrophotographic photosensitive drum, and said first and second inclined surfaces being disposed on an inner surface of said first hole portion and being symmetrical with respect to said imaginary plane, wherein said first and second inclined surfaces rotatably support a first shaft portion provided on one lengthwise end of said electrophotographic photosensitive drum, and an outside of said first hole portion abuts against a first main body positioning portion provided in the main body in a state in which said process cartridge is mounted on the main body;
• and
• a second supporting member having a second hole portion, a third inclined surface, and a fourth inclined surface, said third and fourth inclined surfaces being inclined with respect to said imaginary plane, and said third and fourth inclined surfaces being disposed on an inner surface of said second hole portion and being symmetrical with respect to said imaginary plane, wherein said third and fourth inclined surfaces rotatably support a second shaft portion provided on the other lengthwise end of said electrophotographic photosensitive drum, and an outside of said second hole portion abuts against a second main body positioning portion provided in the main body in a state in which said process cartridge is mounted on the main body.

An electrophotographic image forming apparatus on which a process cartridge is detachably mountable for forming an image on a recording medium, said electrophotographic image forming apparatus comprising:

• (i) a process cartridge including:
• an electrophotographic photosensitive drum;
• a plurality of process means provided in contact with said electrophotographic photosensitive drum;
• a first supporting member having a first hole portion, a first inclined surface, and a second inclined surface, said first and second inclined surfaces being inclined with respect to an imaginary plane passing through an axis of said electrophotographic photosensitive drum, and said first and second inclined surfaces being disposed on an inner surface of said first hole portion and being symmetrical with respect to said imaginary plane, wherein said first and second inclined surfaces rotatably support a first shaft portion provided on one lengthwise end of said electrophotographic photosensitive drum, and an outside of said first hole portion abuts against a first main body positioning portion provided in a main body of said electrophotographic image forming apparatus in a state in which said process cartridge is mounted on said main body;
• and
• a second supporting member having a second hole portion, a third inclined surface, and a fourth inclined surface, said third and fourth inclined surfaces being inclined with respect to said imaginary plane, and said third and fourth inclined surfaces being disposed on an inner surface of said second hole portion and being symmetrical with respect to said imaginary plane, wherein said third and fourth inclined surfaces rotatably support a second shaft portion provided on the other lengthwise end of said electrophotographic photosensitive drum, and an outside of said second hole portion abuts against a second main body positioning portion provided in said main body in a state in which said process cartridge is mounted on said main body;
• and
• (ii) conveying means for conveying the recording medium.