| 摘要 |
PURPOSE:To improve the quality and to increase the durability through the improvement of electric generating efficiency and sound effect, by freely rotating a coil in the gap of magnetic poles by means of the torque from a coil driving piece displaced in response to the movement of a stylus. CONSTITUTION:The movement of a stylus 14 is delivered to a cunti-lever 15 to activate a coil driving piece 16 attached at the tail end of the lever. In this case, in each magnetic pole gap consisting of a magnet 20 and a yoke 21, a coil winding frame 19 supported with a pivot 17 and each coil 18 wound on the coil winding frame 19 are induced electricity, since they are moved in the magnetic pole gap through the torque of the coil driving piece 16 taking the pivot 17 as a center, and the current corresponding to the displacement flows to the coils 18. Accordingly, since all the coils 18 are located in the magnetic pole gap, the efficiency of electricity generation increases without increasing the effective mass of the cunti-lever 15, hardly causing resonance phenomenon to the oscillating system. |
