Process cartridge receiving from an image forming apparatus into which it is mounted a downstream-moving force during mounting and such image forming apparatus

1. A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus including an openable member movable between a closing position for closing an opening in the apparatus and an open position for opening the opening, a guiding member, a main assembly positioning portion, and a main assembly movable member movable in interrelation with movement of the openable member, said process cartridge comprising:

an electrophotographic photosensitive member;

process means actable on said electrophotographic photosensitive member;

a cartridge positioning portion, engageable with the main assembly positioning portion that positions said process cartridge relative to the main assembly;

a cartridge movable member movable by movement of the main assembly movable member,

wherein when said process cartridge, upon mounting of said process cartridge to the main assembly of the apparatus through the opening while being guided by the guiding member, stops at a position upstream, with respect to a process cartridge mounting direction, of an image formation position where said cartridge positioning portion is engaged with the main assembly positioning portion, said cartridge movable member is moved by movement of the main assembly movable member to contact said guiding member, by which said cartridge movable member receives, from the guiding member, a force for moving said process cartridge downstream with respect to the mounting direction.

2. A process cartridge according to claim 1 , wherein said cartridge movable member functions also as a supporting member that movably supports a shutter that protects said electrophotographic photosensitive member.

3. A process cartridge according to claim 2 , wherein said supporting member includes a contact portion which is contactable to the guiding member by the movement of said cartridge movable member caused by the movement of the main assembly movable member, when said process cartridge is being mounted to the main assembly of the apparatus while being guided by the guiding member.

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

(i) an openable member movable between a closing position for closing an opening in said apparatus and an open position for opening the opening;

(ii) a main assembly positioning portion;

(iii) a main assembly movable member movable in interrelation with movement of the openable member; and

(iv) a guiding member that guides the process cartridge, the process cartridge including an electrophotographic photosensitive member, process means actable on the electrophotographic photosensitive member, a cartridge positioning portion, engageable with said main assembly positioning portion, that positions the process cartridge relative to said main assembly of said electrophotographic image forming apparatus, and a cartridge movable member movable by movement of said main assembly movable member;

wherein, when the process cartridge, upon mounting of the process cartridge to said main assembly of said apparatus through the opening while being guided by said guiding member, stops at a position upstream, with respect to a process cartridge mounting direction, of an image formation position where the cartridge positioning portion is engaged with said main assembly positioning portion, and the cartridge movable member is moved by movement of said main assembly movable member to contact said guiding member, by which said guiding member applies, to the cartridge movable member, a force for moving the process cartridge downstream with respect to the mounting direction.

5. An apparatus according to claim 4 , wherein the cartridge movable member functions also as a supporting member that movably supports a shutter that protects the electrophotographic photosensitive member, and wherein said main assembly movable member moves the shutter in interrelation with the movement of said openable member.

6. An apparatus according to claim 4 , wherein said guiding member includes a groove portion to which the cartridge movable member is contactable by movement of said main assembly movable member, when the process cartridge stops at a position upstream, with respect to the process cartridge mounting direction, of a mount position where the cartridge positioning portion is engaged with said main assembly positioning portion, and the cartridge movable member is moved by movement of said main assembly movable member to contact to said guiding member.

7. An apparatus according to claim 6 , wherein when the process cartridge is positioned at the mount position, the cartridge movable member is spaced from said guiding member.

8. An apparatus according to claim 4 , further comprising a pushing member movable in interrelation with movement of said openable member to urge the cartridge positioning portion to said main assembly positioning portion.

9. An apparatus according to claim 8 , wherein said pushing member urges the cartridge positioning portion to said main assembly positioning portion after the process cartridge is moved downstream with respect to the mounting direction.