| 摘要 |
A rotatable multi-key is provided to secure smooth rotation of a wheel key by installing a ring-shaped rotary washer with a low friction coefficient between a holder and the wheel key. A rotatable multi-key includes a holder(40), a wheel key(50), an operation feeling unit(60), a substrate(20), and a dome sheet(30). The wheel key is rotatably installed on the holder and has a ring-shaped magnet(52) in which N and S poles are alternately arranged. The operation feeling unit is made of a magnetic steel plate to so that only attraction acts between the magnet and the operation feeling unit. The operation feeling unit has a plurality of contact pieces(62) corresponding to the magnet. The substrate has a plurality of contact units(22a,22b) and a magnetic field detecting element(23). The dome sheet is attached on the substrate and has a plurality of metal domes(31) corresponding to the contact units of the substrate.
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