| 摘要 |
A rotation transmission unit includes a driving unit that provides a rotational power; a rotation transmission member that is rotated due to reception of the rotational power transmitted from the driving unit; a rotation member that is rotated due to reception of a rotation of the rotation transmission member; a locking groove that is formed at one of the rotation transmission member and the rotation member; and a locking member that is arranged at the other of the rotation transmission member and the rotation member. A surface of the locking member on the locking groove side is flat. |
