Abstract: A roller shade actuation device includes two actuators arranged in a winding drum, a shaft inserted into the winding drum, and a transmission mechanism. Each actuator includes a housing fixed to the winding drum, a rotary power member arranged in the housing, a driving gear fixed to an output shaft of the rotary power member and coaxial with the output shaft, and a first transmission gear rotatably mounted to the housing and meshed with the driving gear. The actuators are connected linearly in sequence. The driving gear of one actuator adjacent to the transmission mechanism is transmission-matched with and connected to the transmission mechanism, and the driving gears of the remaining actuators are meshed with the first transmission gears of neighboring actuators adjacent to the transmission mechanism. The actuators are connected in series to form an actuator combination through the driving gears and the first transmission gears.

Abstract: A venetian blind adjustment device includes a hollow bottom shell, a worm and worm wheel mechanism arranged in the bottom shell, an operation member, and a cover. The bottom shell includes two opposite sidewalls, and defines an opening in a top and between tops of the sidewalls. The worm and worm wheel mechanism includes a worm and a worm wheel. An end of the operation member extends into the bottom shell and is connected to the worm. The cover is mounted to the bottom shell to close the opening. Two ends of the worm wheel are rotatably mounted to the sidewalls of the bottom shell, and two limit hooks extend down toward the bottom shell from opposite sides of the cover, to abut against outer surfaces of the sidewalls, respectively.

Abstract: A ladder tape device for a venetian blind includes a U-shaped fixing base fixed in a head rail of the venetian blind, a ladder tape retainer with opposite ends placed on corresponding two side-panels of the fixing base, a plurality of ladder tapes with a top end of each ladder tape passing through the fixing base and being wound on the ladder tape retainer, and a limiting cover buckled on the top end of the fixing base, an inner wall of the limiting cover and an outer wall of the top end of the ladder tape retainer are separated by a predetermined distance to form a ladder tape limiting space.

Abstract: A curtain winding device includes a beam, a power mechanism mounted to the beam, a transmission rod driven by the power mechanism to rotate, and two reels fitted about the transmission rod and relatively fixed with the transmission rod in a circumferential direction. Each reel is wound with a drawstring. A drawstring holder is disposed on the beam to guide the drawstring to be wound on the reel. The beam is fixed with a nut. Each reel includes a screw segment screwed to the nut, and a cone segment gradually increasing in an outer diameter along an extending direction. An end of the reel away from the screw segment is provided with a fixing portion for fixing a distal end of the drawstring, and a positioning portion protruding from an outer side surface of the reel to abut against the drawstring holder to position an initial position of the reel.

Abstract: A roller shade actuation device includes a driver arranged in a winding drum, a shaft fixed to a support frame outside one end of the winding drum and inserted into the winding drum, and a transmission mechanism for realizing power transmission between the driver and the shaft. The driver includes a housing relatively fixed to the winding drum, a rotation power member arranged in the housing, and a driving gear coaxial with and fixed to an output shaft of the rotation power member. The transmission mechanism includes a first transmission gear meshed with the driving gear, a synchronous gear coaxial with the first transmission gear, and a fixed gear fixed to the shaft and meshed with the synchronous gear. Axial directions of the output shaft and the shaft are vertical, and the synchronous gear and the fixed gear are bevel gears whose axial directions are perpendicular to each other.

Abstract: A curtain cord retracting and releasing device includes a reel for winding a cord, a power mechanism, and a transmission mechanism for transmission between the power mechanism and the reel to drive the reel to rotate to retract or release the cord. The transmission mechanism includes two meshed external gears with the same structure. A center distance of the external gears is a fixed value, and one external gear is connected to an output shaft of the power mechanism and the other is connected to the reel. The external gears are non-circular gears with a radius of curvature of a pitch line gradually increasing. A gear tooth corresponding to a node with a smallest radius of curvature on the pitch line and a gear tooth corresponding to a node with a largest radius of curvature on the pitch line are transitioned by a curved surface.

Abstract: A window shutter actuation device includes a cord for driving window shutter slats to move, a retracting mechanism for winding an end of the cord away from the window shutter slats, a brake mechanism arranged between the retracting mechanism and the window shutter slats for controlling a retracting or releasing speed of the cord, and a power mechanism for driving the retracting mechanism to rotate to wind the cord. The retracting mechanism includes a frame, a reel rotatably mounted to the frame for winding the cord, and a wheel arranged outside and adjacent to an end of the reel. The end of the cord wound on the reel passes about the wheel and then extends to the brake mechanism after extending from the reel.

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: 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: 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 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: 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 ladder tape device for a venetian blind includes a U-shaped fixing base fixed in a head rail of the venetian blind, a ladder tape retainer with opposite ends placed on corresponding two side-panels of the fixing base, a plurality of ladder tapes with a top end of each ladder tape passing through the fixing base and being wound on the ladder tape retainer, and a limiting cover buckled on the top end of the fixing base, an inner wall of the limiting cover and an outer wall of the top end of the ladder tape retainer are separated by a predetermined distance to form a ladder tape limiting space.

Abstract: A curtain winding device includes a beam, a power mechanism mounted to the beam, a transmission rod driven by the power mechanism to rotate, and two reels fitted about the transmission rod and relatively fixed with the transmission rod in a circumferential direction. Each reel is wound with a drawstring. A drawstring holder is disposed on the beam to guide the drawstring to be wound on the reel. The beam is fixed with a nut. Each reel includes a screw segment screwed to the nut, and a cone segment gradually increasing in an outer diameter along an extending direction. An end of the reel away from the screw segment is provided with a fixing portion for fixing a distal end of the drawstring, and a positioning portion protruding from an outer side surface of the reel to abut against the drawstring holder to position an initial position of the reel.

Abstract: A roller shade actuation device includes a driver arranged in a winding drum, a shaft fixed to a support frame outside one end of the winding drum and inserted into the winding drum, and a transmission mechanism for realizing power transmission between the driver and the shaft. The driver includes a housing relatively fixed to the winding drum, a rotation power member arranged in the housing, and a driving gear coaxial with and fixed to an output shaft of the rotation power member. The transmission mechanism includes a first transmission gear meshed with the driving gear, a synchronous gear coaxial with the first transmission gear, and a fixed gear fixed to the shaft and meshed with the synchronous gear. Axial directions of the output shaft and the shaft are vertical, and the synchronous gear and the fixed gear are bevel gears whose axial directions are perpendicular to each other.

Abstract: A window shutter actuation device includes a cord for driving window shutter slats to move, a retracting mechanism for winding an end of the cord away from the window shutter slats, a brake mechanism arranged between the retracting mechanism and the window shutter slats for controlling a retracting or releasing speed of the cord, and a power mechanism for driving the retracting mechanism to rotate to wind the cord. The retracting mechanism includes a frame, a reel rotatably mounted to the frame for winding the cord, and a wheel arranged outside and adjacent to an end of the reel. The end of the cord wound on the reel passes about the wheel and then extends to the brake mechanism after extending from the reel.

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: 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.