Image forming apparatus

Abstract

An image forming apparatus including a rotatable image bearing drum; a cartridge mountable to a main assembly and including a rotatable developer carrying sleeve; first and second bearings provided in the cartridge, supporting the sleeve at one axial and the other ends end of the sleeve, and having first and second regulated portions, respectively; third and fourth bearings, supporting the drum at one and the other axial ends of the drum, and having first and second regulating portions, respectively; first and second swingable members provided in the main assembly and fixed with one and the other ends and swingable integrally with the cartridge between a first position in which the sleeve contacts the drum and a second position in which the sleeve is spaced from the drum. When the cartridge is in the first position, the first and second regulated portions contact the first and second regulating portions respectively.

1 . An image forming apparatus comprising:
 a main assembly;   a rotatable image bearing member;   a cartridge detachably mountable to said main assembly, said cartridge including a rotatable developer carrying member;   a first bearing provided in said cartridge and supporting said developer carrying member at one axial end of said developer carrying member, said first bearing being provided with a first regulated portion;   a second bearing provided in said cartridge and supporting said developer carrying member at the other axial end of said developer carrying member, said second bearing being provided with a second regulated portion;   a third bearing supporting said image bearing member at one axial end of said image bearing member, said third bearing being provided with a first regulating portion;   a fourth bearing supporting said image bearing member at the other axial end of said image bearing member, said fourth bearing being provided with a second regulating portion;   a first swingable member provided in said main assembly and fixed with one end of said cartridge mounted in said main assembly, said first swingable member being swingable integrally with said cartridge; and   a second swingable member provided in said main assembly and fixed with the other end of said cartridge mounted in said main assembly, said second swingable member being swingable integrally with said cartridge;   wherein said cartridge is swingable integrally with said first swingable member and said second swingable member to move between a first position in which said developer carrying member is contacted with or close to said image bearing member and a second position in which said developer carrying member is spaced from said image bearing member, and wherein when said cartridge is in the first position, said first regulated portion contact said first regulating portion, and said second regulated portion contacts said second regulating portion.   
     
     
         2 .- 9 . (canceled)