| 摘要 |
PURPOSE:To make conversion efficiency high and pickup structure simple by disposing two cantilever driving coils and one magnetic yoke effectively to a cantilever driving part. CONSTITUTION:Cantilever driving coils 8, 8' drive a cantilever 2 in its longitudinal direction or rotate and drive the same with the coupling part of an elastic supporting body 5 as a fulcrum according to the direction of the electric currents to be supplied to the coils 8, 8' by the mutual effect with a permanent magnet 3 which is magnetized in the direction vertical to the central axis of the lever 2. These coils 8, 8' are disposed in both end parts of one magnetic yoke 9 which is so disposed as to face both poles of the magnet 3. Since the cantilever driving coils are mounted to the magnetic yoke in this way, the efficiency of converting electric energy to kinetic energy is improved. |
