Gear mechanism and image forming apparatus

摘要

A gear mechanism is provided and includes a first sun gear; a first planetary gear configured to mesh with the first sun gear; a first arm configured to keep a distance between the first sun gear and the first planetary gear and configured to swing around a rotation axis of the first sun gear; a second sun gear; a second planetary gear configured to mesh with the second sun gear; a second arm configured to keep a distance between the second sun gear and the second planetary gear and configured to swing around a rotation axis of the second sun gear; and an interlocking unit configured to connect the first arm and the second arm with each other for interlocking the swinging of the first arm and the second arm, the interlocking unit configured to move independently of rotations of the first sun gear and the second sun gear.