| 摘要 |
A generating device includes a tube, a coil mounted around the tube, and a permanent magnet movably mounted in the tube to pass through the coil. Thus, the permanent magnet is movable in the tube reciprocally by a shaking action to pass through the coil to cause variation of a magnetic field of the coil, so that the coil produces an electric current by variation of the magnetic field, thereby generating the electricity so as to supply an electric power to the light emitting diodes. In addition, the light emitting diodes are lighted by a shaking action without needing aid of an external power supply or a battery.
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