Patent ID: 7857030
Filing Date: 2010-12-28
Classification: E06B

Abstract:
1. A clutch for an electric window covering which has a lift cord assembly to retract and extend shade, comprising: a driving gear coupled on an axle; and a driven gear which is hinged on an anchor shaft and has a pulley to be wound by the lift cord assembly; wherein the driving gear is engaged with the driven gear to allow the electric window covering to be retracted and extended electrically; and the driving gear is also disengaged with the driven gear to allow the electric window covering to be retracted and extended manually; an elastic element pressing the bottom of the driving gear; and a pushbutton which has a boss and a bottom pressing the driving gear; the pushbutton being depressible to allow the bottom thereof to press the driving gear to engage with the driven gear; releasing the pushbutton causing the elastic element to press the driving gear to be disengaged with the driven gear; a battery pressing the pushbutton to allow the driving gear to be engaged with the driven gear; the battery being removable to release the pushbutton to allow the elastic element to press the driving gear to be disengaged with the driven gear.