Patent ID: 8818235
Filing Date: 2014-08-26
Classification: G03G

Abstract:
1. A developing unit detachably mountable in a photosensitive member unit including a photosensitive member on which an electrostatic latent image is formable, a pressing member, and a positioning portion, the developing unit comprising: a developing unit frame; a developing roller rotatably supported by the developing unit frame, and configured to supply developing agent to the electrostatic latent image formed on the photosensitive member; and a directing portion fixed to the developing unit frame configured to direct the developing unit frame to a predetermined orientation and to fix a position of the developer unit frame, the directing portion comprising: wherein one of the positioning portion and the positioned portion includes a planar portion abuttable on the other of the positioning portion and the positioned portion, wherein the developing unit frame is movable between a pressed position where the pressed portion receives the pressure force from the pressing member and a pressure release position where the pressure force from the pressing member to the pressed portion is shut off, when the developing unit frame is mounted in the photosensitive member unit, wherein, when the developing unit frame is in the pressed position, the developing roller is movable between a separation position where the developing roller is spaced apart from the photosensitive member and a contact position where the developing roller is in contact with the photosensitive member, and wherein the planar portion extends in a moving direction of the developing roller from the separation position toward the contact position.