| 摘要 |
PROBLEM TO BE SOLVED: To suppress image quality degradation and cost increase, to facilitate control of image formation speed, and to attain miniaturization in an image forming device provided with a plurality of image forming parts. SOLUTION: In a drive transmission part 301 of the image forming device, drive gears 302a to 302d, which respectively transmit driving forces to contact type rotational electrifiers of the image forming stations, and drive gears 304a to 304d, which respectively transmit driving forces to developing devices, are provided with the driving forces by corresponding common gears 305a to 305d. The driving forces are substantially equally transmitted to the common gears 305a to 305d by a timing belt 307. The tension of the timing belt 307 is maintained at an appropriate state by a tension gear 308 and a tension roller 309 and is driven by a driving source 401 via a belt drive gear 306. |
