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.

In various aspects, a covering for an architectural structure includes a bottom rail assembly that can be efficiently and effectively assembled during manufacturing of the covering. Specifically, in one embodiment, the bottom rail is configured such that one or more operating system components of the covering can be mounted within and directly supported by the bottom rail. In addition, a separate cover may be coupled to the bottom rail during the assembly process.

A screening device includes a rail, a drive shaft, a motorized drive device, including an electromechanical actuator, and an autonomous electrical power supply device, including a battery module. The battery module includes first and second mounting brackets, each arranged inside the rail and configured to hold the battery module inside the rail. The actuator includes third and fourth mounting brackets, each arranged inside the rail and configured to hold the actuator inside the rail. The brackets are identical. Furthermore, each of the brackets includes an opening, configured to accommodate the drive shaft.

A method for controlling curtain position of a curtain assembly includes a motor and a control unit. The motor includes a detection unit for detecting the working current of the motor. When the curtain moves upward and stops, the detection unit detects the working current increases. The detection unit sends a signal to a processor of the control unit to judge that the curtain reaches the upper-most position. Then the control unit stops the motor and demands the motor to operate reversely a range to lower the curtain slightly. The curtain that is lowered by operating the motor reversely is defined as at a limited position. When the curtain is lowered by the motor, the lower-most position of the curtain is defined by a pre-set number of revolutions of the motor. The pre-set number of revolutions of the motor is set by the control unit.

A window covering includes a housing, a covering material, a spindle, and a driving device. The spindle and the driving device are provided at the housing. The driving device includes a motor having a shaft, and an epicyclic gearing decelerating device having an input end and an output end connected to the shaft and the spindle, respectively. Whereby, the spindle can drive the covering material to expand or to collapse. The epicyclic gearing decelerating device includes a ring portion and at least a planet gear assembly which is coupled between the input end and the output end. The planet gear assembly includes a plurality of planet gears having a Shore A durometer hardness of 45-90, which is rotatable along the fixedly provided ring portion. While being driven to move, a lower end of the covering material moves at a speed higher than 65 mm per second.

The invention provides a roller blind device with stepless adjustment comprising a roller blind base, a reel unit pivotally disposed on the roller blind base, and a blind fabric assembled on the reel unit, the reel unit comprises a first positioning unit, a second positioning unit, an outer tube accommodates the first positioning unit and the second positioning unit, a rotating shaft is assembled with the first positioning unit, and a first elastic member is disposed on the rotating shaft. Thereby, after a user combines the reel unit assembled with the blind fabric and the roller blind base, the user can drive the connected first elastic member to contract or loosen by adjusting the first positioning unit, so that a counterweight relationship between the reel unit and the blind fabric can be adjusted to achieve the roller blind device with stepless adjustment capable of adjusting a counterweight relationship.

The object of the present invention is to provide a lifting type push-pull positioning curtain which can realize the self-locked positioning of the curtain body without the exposed drawstring and can adjust the unfolding length of the curtain body infinitely. A lifting type push-pull positioning curtain, comprises a curtain body, a mounting box and a push-pull positioning device. The push-pull positioning device comprises an active reel, a transmission wheel set and a slave reel. The transmission wheel set comprises a driving wheel and a driven wheel, the driven wheel receive a scroll spring therein, the head end of the scroll spring is connected to the driving wheel; the active reel and the slave reel are wound with a thread rope therein respectively, and one end of the thread rope is fixed to the reel and the other end thereof is fixed to the bottom of the curtain.

A device for winding and unwinding Alicantina shutters (12) and the like, which are raised by being wound onto themselves by means of at least a first cord (3) connected to a first elastic element (10) which is attached at one end to the head (1) of the shutter and at the other end to the end of the cord (3) which allows the unwound segment of the shutter (12) to be kept in a stretched position. The device includes at least a second cord (3′) related to a second elastic element or spring (10′) located at another point of the width of the shutter such that the elastic elements (10, 10′) are retracted onto themselves during the process of unwinding the shutter due to the instantaneous tension difference supported by each of the elastic elements (10, 10′). The shutter (12) can be motorized.

A cordless retractable shade including an operating system for the shade that varies a biasing force of a spring to counterbalance the shade. The bottom rail of a retractable shade can be raised or lowered, and due to the operating system remains in any selected position of the covering between fully extended and fully retracted, without the use of operating cords. The system includes a method of negating and reversing the spring bias effect at a strategic position whereby the flexible vanes of the shade can be adjusted between open and closed.

A window covering includes a first cord extending along a drive pulley of a first ladder control mechanism such that motion of the lift cord along the drive pulley during retraction of slats towards a first rail drives rotation of the drive pulley in a first rotational direction to rotate a ladder pulley for tilting of the slats from an open position to a closed position and motion of the lift cord along the drive pulley during extension of the slats drives rotation of the drive pulley in a second rotational direction to rotate the ladder pulley for tilting of the slats from the closed position to the open position. The ladder may be composed of cord or tape. Each ladder may include a front rail, a rear rail, and rungs that extend between the front and rear rails for supporting the slats.