Detection device, developing device and image forming apparatus
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United States of America Patent
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Sep 1, 2015
Grant Date -
Apr 23, 2015
app pub date -
Oct 16, 2014
filing date -
Oct 21, 2013
priority date (Note) -
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Abstract
A detection device configured to detect a charge amount of toner on a developer carrier includes an assembly with a quartz oscillator and having a first surface and a second surface that are provided in the quartz oscillator. The first surface has a recess and a projection formed in a direction in which the quartz oscillator vibrates. In addition, a capacitor is connected to the assembly, a first measurement unit measures a potential difference between two ends of the capacitor, and a second measurement unit measures a frequency of the quartz oscillator. In a case where an alternating-current power is applied to the assembly, the direction in which the quartz oscillator vibrates is parallel to the first surface.
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