| 摘要 |
<p>A rotary capacitor (11) which changes electrostatic capacity by changing a mutually opposite area of a pair of electrodes (13;14) which opposes each other, includes a rotary shaft (12) which can rotate around a central axis (C), wherein the pair of electrodes (13;14) includes a first electrode plate (13) which protrudes from a circumferential surface (12a) of the rotary shaft (12), and a second electrode plate (14) which may be separated in a direction along the central axis with respect to the first electrode plate (13) and may be disposed so as to oppose the first electrode plate (13), and a notch (21) which penetrates in a plate thickness direction may be formed on an edge portion (13b) of the first electrode plate (13).</p> |
