| abstract |
A developing device frame usable with a process cartridge detachably mountable to a main assembly of an image forming apparatus, wherein the process cartridge includes an electrophotographic photosensitive member, a developing roller for supplying toner to the electrophotographic photosensitive member to develop a latent image formed on the photosensitive member, a toner accommodating portion for accommodating the toner to be used for development operation of the developing roller, and a stirring member for stirring the toner fed out of the toner accommodating portion, the developing device frame includes a developing roller mounting portion for mounting the developing roller; an antenna member mounting portion for mounting, along a longitudinal direction of the developing roller, an antenna member having a portion opposed to the developing roller and an extension discharging portion extended to a portion not opposed to the developing roller from the opposed portion, wherein the antenna member produces an electric signal to be transmitted to detecting means provided in the main assembly of the electrophotographic image forming apparatus to notify that the process cartridge is mounted to the main assembly of the electrophotographic image forming apparatus; a first gear mounting portion for mounting a first gear for transmitting, to the stirring member, driving force for rotating the stirring member, wherein the gear is disposed at the same side, in the longitudinal direction of the developing device frame, as a side where an antenna member mounted to the antenna member mounting portion is extended. |