| 摘要 |
PURPOSE:To accurately know the using condition of a process kit, by providing a mechansm within the process kit to count a picture forming circuit. CONSTITUTION:A pin 20 projected from a photoreceptor drum 2 shifts a ratchet 21 by a tooth with one turn of the drum 2. Then a ratchet 24 is shifted by a tooth with one turn of the ratchet 21. A disk 26 functioning as a lifetime display part is attached to the ratchet 24 which turns towad an arrow mark, and at the same time a radial color band 27 is also provided to the disk 26 in accordance with the durable lifetime of the drum 2. A process kit cover 23 has an aperture part 29 and can observe and confirm the band 27 of the disk 26 on the retachet 24. The using condition of a process kit can be confirmed when necessary through the part 29 from the outside of a main body device. Thus the using condition of the process kit can be accurately known. |
