Patent ID: 7274899

Claim:
An image forming device comprising: a bearing member having a surface on which an electrostatic latent image is formed; a laser unit that irradiates the surface of the image bearing member with a laser light in accordance with image data; a developing device that develops the electrostatic latent image on the surface of the image bearing member; a transfer unit that transfers a developed toner image onto a sheet; a fixing device for fixing the developed image on the sheet; a toner container for storing toner to be supplied to the developing device; and a toner supply member located so as to be movable between a supply position that supplies the developing device with the toner in the toner container and a retracted position apart from the developing device; wherein the developing device includes a plurality of developing units provided to correspond to different developing colors, a rotary frame holding the developing units in a circumferential direction in order to place each of the developing units opposite the image bearing member by rotation, and a lock mechanism for prohibiting the rotary frame from rotating; the toner supply member includes a supply member for supplying the toner from the toner container to each of the developing units, and the supply member is movable between a supply position in which a tip of the supply member advances into each of the developing units and a retracted position in which the tip of the supply member is retracted outside of each of the developing units; the supply member is located such that the supply member applies torque to the rotary frame in a first direction when the supply member advances into each of the developing units; and the lock mechanism is capable of prohibiting the rotary frame from rotating in the first direction.