Knocking sensor
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United States of America Patent
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Mar 22, 2016
Grant Date -
Mar 20, 2014
app pub date -
Sep 20, 2013
filing date -
Sep 20, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
In a knocking sensor, including: a metal shell having a cylindrical portion, and a flange portion that is located on the cylindrical portion, and projected toward an outside of the cylindrical portion in a circumferential direction, an annular weight that is fitted onto an outer circumference of the cylindrical portion, and has an upper surface, an annular piezoelectric element that is fitted onto an outer circumference of the cylindrical portion, and interposed between the flange portion and the weight, and an insulating body that is interposed between the flange portion and the piezoelectric element, a protruding portion that is protruded while being plastically deformed from an inner surface of the cylindrical portion outward in a circumferential direction, and locks the weight in contact with the upper surface of the weight directly or through a member is disposed on an outer circumferential surface of the cylindrical portion.
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