Abstract: A take-up device for a curtain includes a pull-cord, a reel mounted to a top beam of the curtain, an actuating mechanism for actuating the reel to rotate to retract or release the pull-cord, and a braking mechanism for braking the pull-cord. The reel defines a winding groove and an actuating slot. The actuating mechanism is a flat spiral-spring assembly. The flat spiral spring assembly includes a wheel arranged in parallel with the reel and a flat spiral-spring. An end of a reed of the flat spiral-spring is wrapped around the wheel, and an opposite end of the reed is fixed in the actuating slot. The top end of the pull-cord is wound on the winding groove, and an opposite end of the pull-cord extends out of the winding groove, extends through the braking mechanism, and then is fixed to a curtain body of the curtain.

Abstract: 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.

Abstract: An adjustment device for a drawstring of a curtain with a curtain body includes a base fixed to a bottom end of the curtain body and defining a shaft hole, a reel received and rotatably mounted in the shaft hole of the base, and a locking assembly for limiting an axial displacement of the reel. A sidewall bounding the shaft hole of the base defines a through slot. The base forms a number of first positioning portions distributed in a circle about a central axis of the shaft hole. An end of the drawstring passes through the through slot of the sidewall bounding the shaft hole and is wound on the reel. The reel forms a number of second positioning portions cooperating with the first positioning portions to prevent the reel from rotating.

Abstract: A built-in roller shade actuation device for actuating a winding drum with opposite ends rotatably mounted to corresponding frames and an outer side mounted with an end of a shade body includes an actuator assembled in the winding drum for providing a rotation power, a shaft mounted to one of the frames outside an end of the winding drum and inserted into the winding drum, and a gear pair mounted between the actuator and the shaft for realizing power transmission. A shell of the actuator and the winding drum are relatively fixed in a circumferential direction. The gear pair includes a planetary gear mounted to an output shaft of the actuator, and a fixed gear mounted to the shaft and coaxial with the winding drum. The planetary gear revolves around the fixed gear while being driven to rotate by the output shaft of the actuator.

Abstract: An embodiment of the present invention provides a roller shade actuation device for actuating a winding drum with an outer surface mounted with an end of a shade body. Opposite ends of the winding drum are rotatably mounted to corresponding frames with the help of pivots. The roller shade actuation device is mounted between one of the frames and the winding drum. The roller shade actuation device includes a middle shaft rotatably mounted to an inner sidewall of the frame, and a plane scroll spring mounted outside the middle shaft and axially parallel to the middle shaft. The middle shaft is connected to a pivot of a corresponding end of the winding drum through shaft connection. An outer end of a reed of the plane scroll spring is fixed to an outer surface of the middle shaft.

Abstract: A driving mechanism for curtain cord winding reels includes a driving module, and first and second transition shafts mounted to two sides of the driving module. The driving module includes a base, a power member assembled in the base, and a middle shaft connected to the power member and mounted to two sides of the base. Two ends of the middle shaft extend out of the sides of the base and form a first shaft hole and a first axis. The first and second transition shafts are mounted to the ends of the middle shaft. An end of the first transition shaft connected to the middle shaft forms a second axis. An end of the second transition shaft connected to the middle shaft defines a second shaft hole. Cross sections of the first and second shaft holes, the first and second axes are matched with one another, and are non-circular.

Abstract: A cord winding mechanism for a blind cord with a first end fixed to a window blind includes a base, a cord winder rotatably mounted to the base, a cord guiding assembly mounted to the base, and an elastic press member mounted to the base. The cord winder defines an annular slot to wind the blind cord layer by layer. The cord guiding assembly is abutted against an unwound portion of the blind cord between the cord winder and the window blind. A second end of the blind cord is fixed to an end of the cord winder in the slot. The press member is elastically abutted against a portion of the blind cord just separate from the cord winder.

Abstract: A pull-cord control device for a curtain without an operation cord includes a pull-cord (3), a base (1), and a pressing plate (2) rotatably mounted to the base through a rotation shaft (42). The base forms first friction shafts (11). The pressing plate forms second friction shafts (21) staggered with the first friction shafts. The pressing plate forms a fixing pole (41). A first end of the pull-cord is connected to a retractable-cord device (5), and a second end of the pull-cord extends between the first and second friction shafts, and is connected to a curtain body (6) after extending about the fixing pole. When the curtain body moves up and down, the pressing plate is rotated between a clamping position and a loose position. When the pressing plate is in the clamping portion, the second friction shafts actuate the pull-cord to wander between the first and second friction shafts.

Abstract: A cord winding mechanism for a blind cord with a first end fixed to a window blind includes a base, a cord winder rotatably mounted to the base, a cord guiding assembly mounted to the base, and an elastic press member mounted to the base. The cord winder defines an annular slot to wind the blind cord layer by layer. The cord guiding assembly is abutted against an unwound portion of the blind cord between the cord winder and the window blind. A second end of the blind cord is fixed to an end of the cord winder in the slot. The press member is elastically abutted against a portion of the blind cord just separate from the cord winder.