Patent ID: 6853821

Claim:
A toner cartridge removably mounted on a developer casing storing a developing roller for developing an electrostatic latent image formed on a circumferential surface of a photosensitive drum by pressing against the photosensitive drum, the toner cartridge comprising: a biasing force generating means disposed at plural areas of the cartridge and that presses against a fixed portion of an image forming device in elastic manner; an actuating rod capable of switching said biasing force generating means between a released state and a non-active state; a pivotable lock member for maintaining or releasing a lock corresponding to the movement of said actuating rod; and a manipulation member capable of sliding/pivoting motion causing said actuating rod and said lock member to be moved in predetermined manner, wherein said manipulation member, said actuating rod and said lock member are arranged so that they interconnect mutually; the sliding/pivoting motion of said manipulation member moving said actuating rod and further moving said lock member to engage or to release said lock, to thereby maintain or release fixture of and to simultaneously pivot or release pivot of said developer casing to said image forming device.