| 摘要 |
A swaying device for an electric fan includes a base consisting of an upper shell and a lower shell, a small motor and a detective element arranged in the base. The motor turns 360 degrees or sways for a certain angle adjustable to move the upper shell in the same way to turn or sway an electric fan fixed on the upper shell in the same way of the upper shell. The detecting element finds out the swaying angle of the electric fan and the speed of the swaying.
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