The first transmission mechanism of the present invention includes a first permanent magnet, a first rocking member with a rod-like shape that includes one end at which the first permanent magnet is disposed and is extended in Z-axis direction, and two supporting bodies that rockably support the first rocking member at two different positions in Z-axis direction of the first rocking member. The first rocking member is rocked to move the first permanent magnet by an amount of displacement smaller than an amount of displacement inputted to the first supporting body, which is located on a side of the other end of the first rocking member in the two supporting bodies.