Developing blade, process cartridge, and electrophotographic image forming apparatus

摘要

A developing blade for use in a process cartridge regulates the amount of developer on a peripheral surface of a developing roller. The process cartridge includes: an electrophotographic photosensitive drum; a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum; a developing frame that rotatably supports the developing roller; a drum frame that rotatably supports the electrophotographic photosensitive drum, and that is connected to the developing frame, wherein the developing frame and the drum frame are rockable with respect to each other; and a biasing member for biasing the developing roller toward the electrophotographic photosensitive drum. The developing blade is supported by a supporting member and is attached to the developing frame, and wherein at least one end of the supporting member in a lengthwise direction of the developing roller is provided with an attachment portion to which the biasing member is attached.