TORSION SPRING FOR CONTROL UNIT OF CURTAINS
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United States of America Patent
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Issued Date -
Mar 27, 2014
app pub date -
Sep 24, 2012
filing date -
Sep 24, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A control unit for curtains includes a frame connected with a shaft and a torsion spring is mounted to the shaft. Two extension sections extend from two ends of the torsion spring at an angle. At least one of the two extension sections of the torsion spring has a contact section extending therefrom at an angle. The contact section contacts the end of the protrusion of the socket in a form of face-to-face. By the contact section of the torsion spring, the extension section and the contact section of the torsion spring does not shift to the underside of the protrusion.
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