| 摘要 |
<p>A rotary switch which detects variation in capacitance incident to turning of a dial accurately even in the case where the dial rattles. The rotary switch comprises a body having a fixing surface, a thin flexible substrate fixed to the fixing surface and having a plurality of first electrodes arranged in the first circumferential direction on the first electrode placement surface, a thin electrode plate which has a plurality of second electrodes arranged in the second circumferential direction on the second electrode placement surface facing the first electrode placement surface and is rotatable in the second circumferential direction, a dial having an operating surface and capable of turning in the second circumferential direction, and a resilient member interposed between the reverse operating surface and the surface of the resilient member. The electrode plate is provided with a plurality of electrode plate protrusions in the circumferential direction on the surface of the resilient member, the dial is provided with a plurality of dial protrusions in the circumferential direction on the reverse operating surface, and the electrode plate protrusion is located between two dial protrusions or the dial protrusion is located between two electrode plate protrusions.</p> |
