CORD WINDING DEVICE FOR A SCREEN, SUCH AS A WINDOW COVERING
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United States of America Patent
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Issued Date -
May 23, 2013
app pub date -
Nov 2, 2012
filing date -
Nov 3, 2011
priority date (Note) -
Abandoned
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Abstract
The invention relates to a cord winding device (1) for a screen, comprising a winding roller (10) arranged for mounting on a rotational shaft of the screen, and a sleeve (20), wherein the winding roller can be received, which sleeve is arranged for mounting on a housing for the rotational shaft. The winding roller is provided with external thread for receiving the cords and the sleeve is provided with internal thread for axial displacement of the winding roller with respect to the sleeve upon rotation of the shaft. The sleeve is provided with a cord passage part with a hole for the cords. The external thread comprises spiral grooves shaped such that the grooves can receive the cords clampingly and in the sleeve at least one pressing element is arranged for pressing a cord into the groove of the external thread.
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