| 摘要 |
A self-power generating digital door lock is provided to semi-permanently use a digital door lock without malfunction due to battery discharge by converting oscillation of a door into electric charges and converting the electric charges into electric energy. A digital door lock(200) includes an outer body(210), an inner body(220), and a power supply unit. The power supply unit includes a piezoelectric generating part(241), an electric charge collection circuit, and a charging part. The piezoelectric generating part is formed with a plate-shaped piezoelectric element(242) for generating electric charges, a mass body(243) for amplifying mechanical oscillation, and a fixing plate(244) attached to an inner connection link(230). The electric charge collection circuit is electrically connected with the piezoelectric element in order to convert the electric charges of the piezoelectric generating part into electric energy. The charging part is connected with the electric charge collection circuit in order to store or charge the electric energy to a charging element.
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