| 摘要 |
A motion sensor includes a base, a first capacitance electrode, and a second capacitance electrode. The first capacitance electrode is received within the base and comprises first capacitance electrode sheets. The second capacitance electrode is received within the base and aligned with the first capacitance electrode to form a capacitance, and comprises second capacitance electrode sheets facing and being aligned the middle group of the first capacitance electrode sheets. The capacitance is changed when the second capacitance electrode sheets stray from the corresponding first capacitance electrode sheets.
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