A controller assembly includes a housing, first and second tube units, and first and second runners. Each of the first and second runners slides on a respective one of the first and second tube units when the respective one of the first and second tube units is driven to rotate. In response to sliding of the first runner to bring the first runner into abutment with the second runner, the first runner is prevented from sliding over the second runner, whilst impeding rotation of the first tube unit. In response to sliding of the second runner to bring the second runner into abutment with the first runner, the second runner is prevented from sliding over the first runner, whilst impeding rotation of the second tube unit.

The invention relates to window coverings modification kit and is more specifically related to cordless blinds for covering window openings modification kit and, more particularly to cordless window coverings modification kit for tall windows.

A spring drive system for a window shade includes a housing, a first and a second gear engaged with each other and respectively assembled about a first and a second pivot axis, two springs respectively assembled at two opposite sides of the second gear and respectively connected with two take-up reels provided on the first gear, a first cord drum and a third gear fixedly connected with each other and assembled about a third pivot axis, the first and third gears being respectively located at different levels along the first and third pivot axes and respectively engaged with a first gear train, a second cord drum and a fourth gear fixedly connected with each other and assembled about a fourth pivot axis, the second and fourth gears being respectively located at different levels along the second and fourth pivot axes and respectively engaged with a second gear train.

A spring drive system for a window shade includes a housing, a first and a second gear engaged with each other and respectively assembled about a first and a second pivot axis, two springs respectively assembled at two opposite sides of the second gear and respectively connected with two take-up reels provided on the first gear, a first cord drum and a third gear fixedly connected with each other and assembled about a third pivot axis, the first and third gears being respectively located at different levels along the first and third pivot axes and respectively engaged with a first gear train, a second cord drum and a fourth gear fixedly connected with each other and assembled about a fourth pivot axis, the second and fourth gears being respectively located at different levels along the second and fourth pivot axes and respectively engaged with a second gear train.

A cord wrapping mechanism converts linear motion to circular motion for use in coverings for architectural openings. The cord is guided onto a spool.

A cord wrapping mechanism converts linear motion to circular motion for use in coverings for architectural openings. The cord is guided onto a spool.

A connector for coupling to a bead chain is disclosed. In use, the connector is arranged and configured so that the connector can pass over a bearing. In one example of an embodiment, the bearing is positioned in a tensioner so that the connector moves through the tensioner, which is operatively coupled to the bead chain. In one example embodiment, application of a force on the bead chain to move the covering between an extended position and a retracted position, self-orients the connector so that a top portion of the connector faces and/or contacts the bearing so that the connector smoothly passes across an exterior arcuate surface of the bearing. In one example embodiment, the top portion includes a curved surface to contact the curved surface of the bearing.

The present disclosure provides an adjusting device for a curtain cord and a retractable curtain. The adjusting device for a curtain cord comprises a mounting base for fixedly connecting to the lower end of the curtain body, the mounting base is provided with a first threading hole for the cord to pass through, the mounting base is provided with a mounting groove thereon, the first threading hole is provided on the groove wall of the mounting base, and the adjusting device further comprises a stopper for winding and fixing the cord, a winding hole is provided throughout in the middle of the stopper for the cord to pass through, the stopper is detachably jammed within the mounting groove, and a gap for accommodating the cord wound on the outer surface of the stopper is located between the groove wall of the mounting groove and the stopper.

The present disclosure provides an adjusting device for a curtain cord and a retractable curtain. The adjusting device for a curtain cord comprises a mounting base for fixedly connecting to the lower end of the curtain body, the mounting base is provided with a first threading hole for the cord to pass through, the mounting base is provided with a mounting groove thereon, the first threading hole is provided on the groove wall of the mounting base, and the adjusting device further comprises a stopper for winding and fixing the cord, a winding hole is provided throughout in the middle of the stopper for the cord to pass through, the stopper is detachably jammed within the mounting groove, and a gap for accommodating the cord wound on the outer surface of the stopper is located between the groove wall of the mounting groove and the stopper.

A damping device of a window covering is provided, including a headrail, a covering material, and a driving device, wherein the driving device is located in the headrail to raise and extend the covering material. The damping device is provided in the headrail, and includes a metal member and a magnetic member, wherein at least a magnetic pole of the magnetic member faces the metal member. The metal member is located within a magnetic field of the magnetic member. Either one or both the metal member and the magnetic member is drivable by the driving device to make the metal member and the magnetic member move relative to each other. Whereby, the damping device is able to provide a desired damping effect at different temperature or after a long period use, such that the rotation of the metal member and the movement of the covering material are slowed down.