Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 3, 2010
Patent Application Number
12071754
Date Filed
February 26, 2008
Patent Primary Examiner
Patent abstract
A circular magnetic switch comprises a circuit device and a ring. The circuit device is provided with a plurality of magnetic induction elements and the ring is provided with a plurality of circularly arranged magnets, so that the magnetic induction elements are able to sense the relatively positional changes of the magnets when the ring is turned. The circular magnetic switch is characterized in that: at least an anti-interference magnet is further provided between at least two magnets of the plurality of magnets and the polarity of two magnets is opposite to that of the anti-inference magnets that is provided between the two magnets.
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