A curtain controller for easily assembling a bead chain thereof is provided. A bead chain turntable is disposed on an assembling terminal surface of a fixing seat. A positioning seat is combined with the fixing seat to clamp and position the bead chain turntable. A protective cover is assembled on an outer side of the positioning seat. A shielding part is disposed at one side of the protective cover to correspond to an upper edge of the assembling terminal surface of the fixing seat. A fastening groove is disposed at an outer edge of the assembling terminal surface of the fixing seat. A fastening flange is disposed on the shielding part of the protective cover to be inserted into and combined with the fastening groove. A ladder section is formed between a lower side of the fastening flange and the shielding part.

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.

A winder for a blind system, comprising a drive member rotatable in a drive direction and a free direction; a driven member to engage a blind cylinder; a transmission mechanism to selectively transmit rotation of the drive member to the driven member, the transmission mechanism including an intermediate transmission member and an intermediate resistor to provide resistance to rotation of the intermediate transmission member, wherein the transmission mechanism has a drive state when the drive member is rotated in the drive direction to overcome the resistance of the intermediate resistor and transmit rotation of the drive member through the intermediate transmission member to the driven member, and a free state when the drive member is rotated in the free direction, wherein transmission is broken between the drive member and the intermediate transmission member and intermediate resistor.

A motorized drive of a window covering provided with a device for manually operating the motorized drive comprising a housing to be attached to the window covering with a pull cord and a push button for manual operation. A switch converts pulling movements on the pull cord into first electrical signals for the motorized drive. Controls are configured to save a setting value associated with a current position of the window covering in a data memory after receiving second electrical signals from the push button. A method for saving setting values associated with different positions of the window covering provided with the motorized drive comprising the steps of saving a current position by manual operation of the pull cord and/or the push button.

A control apparatus for controlling rotation of a shaft about an axis includes a roller releasably and rotatably connected to a rear housing mount of a housing that is firmly secured to a wall, an operating cord looped on the roller, a front coupling member co-rotatably coupled with the shaft, and a rear coupling member releasably connected to the roller by a rearward resilient force of a resilient member and movable and non-rotatable relative to the front coupling member. The roller is moved, upon an excess downward pulling force, to a releasing position, where the rear coupling member is moved forwardly to release connection with the roller so as to permit removal of the roller from the housing.

An improved roller shade system provides increased support, additional adjustments and/or increased safety. The slip plate allows the brake to slip forward and minimize damage to the clutch spring when a user pulls too hard on the hembar. The center drive mechanism extends through a bracket to allow the drive shaft to distribute power in both directions and drive two shade tube simultaneously. The tube adapter absorbs force from the spinning shade tube to minimize damage to the other components and the bead chain. The sprocket has a back wall supporting the sprocket, allowing the sprocket 130 to rest on the back flange of the sun gear to minimize pressure on the gears. An adjustment arm is adjusted to help level the shade band. The shade bands may be removed without disturbing the other shade bands in the system. A height of a hembar may be adjusted by rotating a rod within the hembar.

The safety device for a chain of a shade. The invention proposes the development of a tamper-proof safety device configured for a chain of a shade, such as the roller type, which, when not being used, is fixed to the body of the chain, and when being used, the chain is free to slide in order to perform the raising and lowering operations of the roller shade.

A screwless curtain control assembly is revealed. An assembly segment is disposed on one end of a bead chain base while first radial positioning parts and first axial positioning parts are arranged at the assembly segment alternately. A sleeve including second radial positioning parts and second axial positioning parts is mounted to the assembly segment of the bead chain base. Thereby the bead chain base and the sleeve are connected stably by the first radial positioning parts and the first axial positioning parts connected to and positioned by the second radial positioning parts and second axial positioning parts respectively. Thus both labor time for fastening screws and cost of the screws are saved. Therefore the screwless curtain control assembly meets the modern industry's requirement for high efficiency at low cost.

A manual drive assembly for a manually-operated window treatment based on a drive chain formed as a loop, may incorporate one or more intermediate tensioners disposed between two ends of the loop. The loop may be formed between a manual clutch mechanism coupled to the window treatment and an end tensioner. The one or more intermediate tensioners may serve to limit slack in the loop such that sides of the loop cannot be pulled to create a large loop, for example, having a gap of four inches or greater, between the hanging sides of the cord.

A device for variably covering an area includes a first shade and a first driver. The first shade includes a first roller, a first draw bar, and a first curtain. The first roller is configured for mounting in a first fixed position. The first curtain has one end connected to the first roller and another end connected to the first draw bar. The first curtain is windable on the first roller to uncover the area and unwindable from the roller to cover the area. The first draw bar includes two ends, and the first driver is connected to the two ends for evenly pulling the first draw bar away from the first roller and unwinding the first curtain.