PORTABLE GENERATOR AND PORTABLE ELECTRONIC APPARATUS COMPRISING IT

摘要

PROBLEM TO BE SOLVED: To provide a portable generator which can convert the kinetic energy of vibration or oscillation during carriage into electric energy efficiently without requiring a troublesome operation, and a portable electronic apparatus comprising it. SOLUTION: The portable generator comprises a rechargeable battery, a tubular coil, a rod-like permanent magnet inserted into the core part of the coil and held movably in the axial direction with a spring, and a rectifier wherein an AC voltage induced in the coil by axial vibration of the permanent magnet based on vibration or oscillation during carriage is rectified by the rectifier to produce a DC voltage for recharging the battery. Resonance frequency in the axial direction of a permanent magnet system comprising the permanent magnet and the spring is substantially matches the average period of a main vibration source generating an axial vibration during carriage.