Patent ID: 8643912

Claim:
A driving mechanism comprising: a first contacting member that comes into contact with a contacted member; a supporting member that supports the first contacting member and is reciprocatably provided, the supporting member moving the first contacting member into contact with or retracting from the contacted member; a cam that reciprocates the supporting member; and a driving force transmission member that is provided to transmit a first driving force to the cam, the driving force transmission member is engaged with the cam when transmitting the first driving force, and is disengaged from the cam when receiving a second driving force; and a driving member that transmits the first driving force and the second driving force to the driving force transmission member and that rotates in a first direction and a second direction, the first direction being opposite to the second direction, wherein the second driving force is applied to the driving force transmission member after the cam is stopped in a state where the cam comes into contact with the supporting member on a small radius end of the cam, wherein the contact member moves when the second driving force is applied to the cam.