| 摘要 |
<p>A rotary switching element, comprises
a membrane switch having a generally annular active area, said membrane switch comprising a plurality of dead regions along said active area where activation of the membrane switch is prevented,
an actuating element mounted for rotation on said membrane switch, said actuating element for locally activating said membrane switch, and
a mechanical step limiter associated to said actuating element, said step limiter for defining two alternating sets of activation and stand-by positions for said actuating element along a rotational travel path of said actuating element and for biasing said actuating element into one of said stand-by positions where said actuating element is associated to one of the dead regions of said membrane switch.</p> |
