SCROLLING UNIT FOR CORDLESS BLINDS
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United States of America Patent
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N/A
Issued Date -
Nov 28, 2013
app pub date -
Sep 14, 2012
filing date -
May 22, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A scrolling unit for blinds includes a scrolling unit having a main wheel, at least one sub wheel and a scrolling spring. The main wheel has a spool and a cable is wrapped to the spool. The scrolling spring has an inner end and an outer end. The inner end is securely wrapped to the main wheel and the outer end is wrapped to the at least one sub wheel. The scrolling force of the inner end is larger than that of the outer end. The cable is wrapped to a mandrel unit in the head box. The cable extends through the head box and is connected to the bottom bar. The blinds are connected between the head box and the bottom bar to which the cable is fixed. The bottom bar is cooperated with the scrolling spring regardless the weight of the bottom bar.
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