ANDRUCK- UND TRENNMECHANISMUS FÜR ENTWICKLUNGSEINHEIT UND DAMIT AUSGESTATTETER BILDFORMUNGSAPPARAT

摘要

A developer unit and image formation device in which a developer carrier is reliably pressed towards and separated from an image carrier is described. A separation and pressing mechanism (303) is provided for separating and pressing the developer carriers (39) of developing cartridges (27) installed in a drum unit (26) onto image carriers (29). This separation and pressing mechanism (303) has a pair of direct cam members (310). Each direct cam member (310) has a release action portion (318) that engages with the releasing projection (212) of a developing cartridge (27) when the developer carrier (39) is to be separated from the image carrier (29). Each direct cam member 310 may also have a pressing action portion (317) that engages with the pressing projection (227) of the developing cartridges (27) when the developer carrier (39) is to be pressed onto the image carrier (29).