Optical heart rate earphone
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United States of America Patent
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Jan 16, 2018
Issued Date -
N/A
app pub date -
Aug 25, 2016
filing date -
May 18, 2016
priority date (Note) -
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Abstract
An optical heart rate earphone includes a front housing, a circuit board assembly, a rear housing assembled to a rear end of the front housing, and a light pipe. The front housing has a sound tube. At least one portion of the sound tube forms at least one light transmission gap. The circuit board assembly includes a circuit board and at least one optical sensor. The at least one optical sensor is corresponding to the at least one light transmission gap. The light pipe has a circular base. At least one portion of a periphery of the base protrudes rearward to form at least one transmittance slice. The light pipe is assembled to the sound tube. The at least one transmittance slice is wedged in the at least one light transmission gap.
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