| 摘要 |
A portable electronic device, which allows for easy self-charging while minimizing the size of a battery and can thus achieve long-term use, comprises: a ring-shaped first housing; a second housing which has a ring shape corresponding to the first housing and is arranged to be parallel to a side of the first housing; a charging coil mounted on the first housing and wound along the ring shape of the first housing; a plurality of magnets arranged in the second housing; and a battery which is charged using a current flowing through the charging coil when the second housing is rotated with respect to the first housing. |
