| 摘要 |
PROBLEM TO BE SOLVED: To reduce the rotation irregularity due to gear engaging vibration with an inexpensive constitution. SOLUTION: This device is constituted so as to reduce a engaging vibration by providing at least one set of gear pair consisting of a gear body 51 in a structure of holding an atenuating member 50 between 2 pieces of helical gear 48 and 49 being inversely twisted each other, and making an engaging factor larger by adopting the helical gears 48 and 49, on drive transmitting means 42 transmitting the drive force of the photoreceptor driving motor 41 to the photosensitive drum 25, while reducing the vibration in the thrust direction by combining 2 pieces of the helical gears 48 and 49 being inversely twisted each other for mutually compensating the thrust force caused by engagement of each helical gear, and moreover to reduce the vibration according to such as a molding error and the assembling error between the helical gears 48 and 49 by the attenuation member 50 held between 2 pieces of the helical gears 48 and 49. |
