| 摘要 |
A portable electric generator that can be applied to a portable electronic device is provided. The portable electric generator includes a case defining a receiving space, a wheel member rotatably coupled to the case, a driving gear coupled to the wheel member or a shaft of the wheel member, a first one-way rotational gear rotating by a torque transmitted from the driving gear, a second one-way rotational gear rotating by the torque transmitted from the driving gear, a direction change gear rotating by a torque from the second one-way rotational gear, a power transmission gear receiving a torque of the first one-way rotational gear and a torque of the direction change gear, and a generator unit for generating electricity by receiving a torque from the power transmission gear.
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