Coil spring unit, driving force transmitting device and image forming apparatus
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United States of America Patent
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Nov 17, 2020
Grant Date -
Jun 18, 2020
app pub date -
Feb 20, 2020
filing date -
Dec 13, 2016
priority date (Note) -
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Abstract
A coil spring unit includes a coil spring; and a metal plate supporting the coil spring, the metal plate including a plurality of supporting portions cooperative with each other to support the coil spring, wherein the supporting portions are provided by bending the metal plate at bending lines and have supporting surfaces substantially perpendicular to the bending lines, respectively, and wherein the supporting surfaces are substantially parallel with outside tangential lines of the coil spring and support the coil spring.
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