Rotary encoder and method of manufacturing the same
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United States of America Patent
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Sep 7, 2010
Grant Date -
Jul 23, 2009
app pub date -
Jan 13, 2009
filing date -
Jan 18, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A rotary encoder includes a case made of insulating resin, a rotatable operation shaft, a slidable brush fixed to the operation shaft, and a signal contact embedded in a surface of the case. The slidable brush has a contacting section slidable on a surface of the case on a predetermined circumference according to a rotation of the operation shaft. The signal contact has an upper surface flush with the surface of the case, a first side surface connected to the upper surface at a first corner having a right angle, a second side surface connected to the upper surface at a second corner having a right angle, and a lower surface opposite to the upper surface. The first and side surfaces are positioned on the predetermined circumference. The lower surface has a width smaller than a width of the upper surface. This rotary encoder has a small size and outputs a signal precisely.
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