An embodiment of the present invention provides a curtain drawstring adjustment mechanism mounted at an outside of a drawstring exit of a curtain drawstring mechanism. The curtain drawstring adjustment mechanism includes a base, a slider slidably mounted to the base, and an adjustment member for adjusting a position of the slider in a direction perpendicular to an axial direction of the drawstring exit. The slider correspondingly forms a drawstring limiting portion for hooking the drawstring.

A device that includes a drive roller, in which the cord for the manual control of a mechanism for opening and closing a curtain or blind is partially wound to allow that said mechanism of curtain or blinds can be automated while maintaining the manual control at the same time.

A device that includes a drive roller, in which the cord for the manual control of a mechanism for opening and closing a curtain or blind is partially wound to allow that said mechanism of curtain or blinds can be automated while maintaining the manual control at the same time.

The present invention discloses a double-layer day-night curtain system and a control method thereof; the system comprises an upper rail, a transmission mechanism inside the upper rail, two curtain assemblies connected to the transmission mechanism, a drive mechanism connected to the upper rail to drive the transmission mechanism, and the two curtain assemblies are disposed in parallel; the control method thereof comprises step A1, select the controller according to the curtain assembly: remote controller X for left-right type curtain assembly, and match it with the controller, and proceed to the next step; select remote controller Y for up-down type curtain assembly, and match it with the controller, and skip to step A3; step A2, the controller automatically switches to the control method for controlling the left-right type curtain assembly when matched; step A3, the controller automatically switches to the control method for controlling the up-down type curtain assembly when matched.

System for moving objects (201,203) by a driving cable (115). The system comprises two cable spools (105,107) enabled to wind and unwind the cable both sides (115a,b). A remote cable pulley (113) is arranged for guiding, at a remote location (X), the cable. The cable spools are arranged to exert, by means of constant torque springs (117,119) a cable pretension force in a direction (T) contrary to the unwinding direction (U) of the spools. Electric driving means (108) are provided to be coupled either to the one or to the other cable spool, thus causing the cable to move from the one to the other cable spool or reversely, in order to move said one or more objects connected to the cable, or to be disengaged from both cable spools in order to enable manual operation of said one or more objects connected to the cable.

The present invention discloses a flexible and force-variable curtain fabric retractable device, including a hollow metal rod for wrapping a curtain fabric and a fixing mounting member mounted on both left and right ends of the hollow metal rod, wherein one end of the hollow metal rod is inlaid and installed with a flexible force-variable elastic structure, and the other end of the hollow metal rod is inlaid and installed with a driven structure, both ends of the hollow metal rod are rotatably connected with a fixing mounting member through a flexible force-variable elastic structure and a driven structure respectively.

The invention relates to an electric housing device having an adjustable span, comprising a main body portion, a winding cord, and a first moving part and a second moving part close to the two ends of the main body portion. The main body portion is provided with a driving device, and the bottom of the main body portion is provided with two parallel slide rails which slide along the length direction of the main body portion. The two slide rails extend towards the first moving part and the second moving part respectively and are fixed to the bottoms of the corresponding moving parts. The main body portion and the first moving part, and the main body portion and the second moving part are respectively provided with through grooves corresponding to the two slide rails, each through groove is located on the outside of the corresponding slide rail, each slide rail is slidably provided with a central running pulley, and the top of each central running pulley extends out from the corresponding through groove. The winding cord revolves around the driving device, the main body portion, the first moving part and the second moving part for one circle and winds around the driving device for several circles. The tops of the central running pulleys are fixed to the winding cord. The device is adjustable in terms of span, widely applicable and light in weight.

The present invention relates to a curtain control system and a curtain control method. When a controller receives a curtain-releasing signal, a braking module releases a curtain so as to lower it, a current position detecting module detects an absolute position of the curtain, and the controller calculates a current velocity and a current acceleration of the curtain according to a variation per unit time of the absolute position. When the current velocity is equal to zero or the current acceleration is smaller than zero, the controller controls a motor to lift the curtain or controls the braking module to hold the curtain at a current position. Accordingly, the present invention uses the absolute position to calculate the current velocity and the current acceleration of the curtain so as to determine whether the curtain has encountered an obstacle.

An opening and closing device for curtains and a system based on the same, mounted on a curtain track, comprises a main engine and a roller mechanism, The main engine comprises a shell with a cavity, a driving wheel mounted in the cavity and partially exposed the shell, a motor arranged in the cavity and controlling the driving wheel to rotate, a controller lied in the cavity and controlling the motor to start and stop, and a signal transceiver module coupled electrically with the controller and receiving starting and stopping signals of the motor; the driving wheel is used for driving the curtains to move along the curtain track; a roller mechanism is mounted on the shell, an end, far away from the shell, of the roller mechanism is hung on the curtain track and presses the driving wheel closely on the curtain track.

A motor driven system for raising and lowering a window covering executes motor ramp trajectory speed control. The motor ramp trajectory limits acceleration of an external motor from the idle (stationary) state to full operating speed, and limits deceleration of the motor from full operating speed back to the idle state. This function reduces stresses on a continuous cord loop drive mechanism. A control system manages solar heating effects in response to sunlight entrance conditions such as system sensor outputs, external weather forecasts, and other data sources. The system automatically opens or close the window covering to increase or decrease admitted sunlight under appropriate conditions. The input interface of the control system includes a visual display and input axis, which are aligned vertically if the window covering mechanism raises and lowers the window covering, and are aligned horizontally if the window covering mechanism laterally opens and closes the window covering.