Window shade, its control module and method of operating the same
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United States of America Patent
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Jun 23, 2015
Grant Date -
Dec 26, 2013
app pub date -
Jan 4, 2013
filing date -
Jun 25, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A window shade comprises a head rail, a plurality of slats, a bottom part, suspension cords connected with cord winding units, and a control module. The control module includes first and second drive axles, a sleeve affixed with the first drive axle, a transmission part connected with the second drive axle, an arrester assembled around the first drive axle, and a release unit including an actuator. The first drive axle is operable to control vertical movement of a bottom part, and the second drive axle is operable to adjust an inclination of the slats. The arrester has a locking state in which it blocks a rotational displacement of the first drive axle to keep the bottom part at a desired position, and an unlocking state allowing rotation of the first drive axle so that the bottom part lowers by gravity action. The actuator has a lengthwise axis, and is operable to move along the lengthwise axis from a first position to a second position to turn the arrester from the locking state to the unlocking state, and the actuator when in the first position can drive the second drive axle in rotation.
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