Patent ID: 7792438

Claim:
A toner cartridge comprising: a toner container which contains toner; a toner supplying opening which is formed in the toner container; a conveying member which conveys the toner toward the toner supplying opening in the toner container while being rotated; a driving member which rotationally drives the conveying member; an agitating member which agitates the toner in the toner container while being rotated; a driven member rotated in association with rotation of the driving member to rotate the agitating member, wherein a rotational speed R2 (rad/s) of the driven member is slower than a rotational speed R1 (rad/s) of the driving member; and a rotational body rotated according to rotation of the driven member, having a plurality of slits in rotational circumference, wherein the number of slits is 1/K or more when a ratio of the rotational speed R1 (rad/s) and the rotational speed R2 (rad/s) is K=R2/R1.