Transmission for image formation apparatus, method of manufacturing the transmission, and image formation apparatus

摘要

A transmission comprises a rotary shaft; a gear secured to the rotary shaft coaxially; and a regulative member secured to the rotary shaft. This regulative member press-contacts one end of the gear to maintain the gear exactly perpendicular to an axis of the rotary shaft. A photosensitive drum is fit to the gear. The regulative member is secured on the rotary shaft by press fitting.