Electrical navigation device
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United States of America Patent
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Issued Date -
Mar 26, 2009
app pub date -
Feb 7, 2008
filing date -
Sep 20, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
This present invention is an electrical navigation device, comprising a base, two encoders and two terminal sets. The base, comprising a rolling rod, is set on a circuit board, the two encoders are set on both sides of the rolling rod of the base, and the two encoders stretch to each other plurality of brushes. The two terminal sets are set on the circuit board corresponding to the two encoders respectively, and each terminal set is composed of two terminals which is not connected to each other. Each of the two terminal sets comprising a terminal which being in normal touch with the corresponding encoder respectively, and the other terminal can being in occasional touch with the corresponding encoder respectively when the rolling rod of the base is rolling.
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