Window shade and control system thereof
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United States of America Patent
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-
May 30, 2017
Grant Date -
Jul 21, 2016
app pub date -
Nov 16, 2015
filing date -
Jan 20, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control system for a window shade includes a suspension member, a first and a second casing portion, a rotary drum, a torsion spring, a coupling member, a transmission axle, a central gear, a ring and planetary gears. The rotary drum is pivotally connected with the first casing portion, and is rotatable to wind and unwind the suspension member. The torsion spring can bias the rotary drum for winding the suspension member, and has a first and a second end respectively affixed with the second casing portion and a coupling member. The transmission axle is disposed through the torsion spring, and is rotationally coupled with the rotary drum and the central gear. The ring is affixed with the second casing portion and has protruding teeth. The planetary gears are pivotally supported by the coupling member, and are respectively meshed with the central gear and the teeth of the ring.
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Cited Art Landscape
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