US 7,360,576 B2Granted

Electric transmission module for module for window curtains having winding wheel

OwnerCheng Long Lininventor

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Abstract

An electric transmission module for window curtains having a winding wheel bridges a power unit and a window curtain set so that the opening/closure of the curtains can be controlled. A string of a set of transmission pieces is wound around a first wheel groove of the winding wheel, and another string of transmission pieces is wound around a second wheel groove of the winding wheel, whereby the forward or backward rotation of the motor urges a synchronic rotation in the winding wheel. The transmission pieces are respectively released at one wheel groove and drawn back at another wheel groove. Compared with the prior art, the transmission module is simple in structure and easy to install. It further improves the problem of sliding between a winding wheel and a transmission string.

Claims3

Dependent claims

An electric transmission module for window curtains having a winding wheel, driven by an electric motor, comprising:

a winding wheel further including at least one first wheel and one second wheel, said first wheel and said second wheel being mounted along an output shaft of said electric motor coaxially and parallel to each other, said first wheel and said second wheel being each provided with a groove around the circumference thereof;
a plurality of transmission strings, one of said transmission strings being wound around said first groove of said first wheel, another of said transmission strings being wound around said second groove of said second wheel;
and
a bracket for mounting said electric motor and a transmission set;
whereby said electric motor rotates in a direction selected from a backward direction and a forward direction to urge a synchronic rotation in said winding wheel so that said transmission strings wound thereon are respectively released or drawn back at said first wheel and drawn back or released at said second wheel, causing a curtain set to open or to close;
and.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/831,484Filed 26 Apr 2004
Published: US 2005/0239588 A127 Oct 2005
Granted: 22 Apr 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A47H 5/0325
Devices with guiding means and draw cords: using electrical or electronical drive, detecting or controlling means
E06B 9/32
Liftable: operating, guiding, or securing devices therefor
E06B 9/361
With vertical lamellae ; Supporting rails therefor: transmissions located at the end of the supporting rail
A47H
Furnishings for windows or doors