Patent ID: 8224428

Claim:
A rotation transmitting mechanism configured to transmit a rotational force, comprising: a three-layered elongated coil that has an innermost layer coil portion, a middle layer coil portion and an outermost layer coil portion with alternating winding directions; a two-layered elongated coil that has an inner layer coil portion and an outer layer coil portion with different winding directions, said two-layered coil being connected to said three-layered coil in a longitudinal direction of said three-layered coil, each coil portion of said two-layered coil having a larger wire diameter than each coil portion of said three-layered coil; and at least one first elastic band that is fit to an outer peripheral area of said three-layered coil to press said outermost layer coil portion of said three-layered coil toward an inner peripheral side and is adapted to rotate with said three-layered coil.