Insert nut, fastening unit including the insert nut, and process cartridge using the fastening unit
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United States of America Patent
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Aug 14, 2018
Grant Date -
Sep 3, 2015
app pub date -
Feb 18, 2015
filing date -
Feb 28, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
An insert nut, which is configured to be inserted into a substrate made of a resin, the insert nut including: an internal thread portion into which a screw is to be fastened; a recess-and-protrusion-shaped portion formed on an outer surface of the insert nut, the recess-and-protrusion-shaped portion including a plurality of ridges and a plurality of roots formed alternately in a circumferential direction; and a flange portion formed on one end side in a screw axial direction of the internal thread portion, wherein a nominal diameter of the screw to be fastened into the insert nut is 3 mm or more, and an outer diameter of the flange portion is 2.4 times or more and 4 times or less as large as the nominal diameter of the screw to be fastened into the insert nut.
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