Disclosed is a double-drum type curtain drum module, comprising a shell base having two compartments, a first guide wheel, a second guide wheel, an auxiliary cord rotator installed in a first compartment, and two cord drums installed in a second compartment. At least two reinforcing bars in parallel are formed in the first compartment. A plurality of first wheel-connecting grooves are formed on the reinforcing bars for installing the first guide wheel. The second compartment has a plurality of second wheel-connecting grooves formed on a bottom surface of the shell base for installing the second guide wheel. A connecting channel is formed between the reinforcing bars and exposed from the bottom surface of the shell base. The connecting channel extends into the second compartment for coupling the first wheel-connecting grooves and the second wheel-connecting grooves. A control cord reset opening is formed from the first guide wheel to a first end of the connecting channel to align between the curtain auxiliary cord access holes. A control cord transferred opening is formed from the second guide wheel to a second end of the connecting channel. Accordingly, what is solved is the rubbing issue of conventional control cord against the topmost curtain sunshade blade caused by conventional control cord being oblique to the curtain auxiliary cords adjacent to the control cord access holes.

A window blind includes a housing, a slat assembly, a slat angle adjusting device, and a first cord. The slat assembly is provided below the housing, and has multiple slats and a bottom end portion. The slat angle adjusting device includes a rotating shaft assembly provided in the housing, and a ladder assembly which includes at least two ladders connected to the rotating shaft assembly for turning the slats. The first cord passes on a front or a rear side of the slats, and connects the rotating shaft assembly and the bottom end portion. Throughout the duration of the rotation of the rotating shaft assembly, the first cord and a warp, which belongs to the ladder assembly and on the same side as the first cord, are both reeled into or out of the housing concurrently, and the slats and the bottom end portion are all rotated concurrently as well.

A curtain cord winding device includes a base, a cord winding mechanism rotatably mounted to the base, and a drive mechanism. The cord winding mechanism includes a main reel fitted about a drive shaft of the drive mechanism, and a secondary reel. The main reel includes a first winding segment for winding a cord, and a screw segment screwed to a screw hole of the base. The main reel and the secondary reel are coaxially arranged and fixed in turn. The secondary reel includes a second winding segment, and a first connecting member. An end of the first winding segment away from the screw segment and an end of the second winding segment away from the first connecting member each is provided with a second connecting member. The first connecting member is fixed to the second connecting member in an axial direction.

A control rope guide device for a window curtain assembly includes a bottom part and a top part. The top part is connected to the top of the bottom part. The control rope guide device is cooperated with the window curtain assembly to separate two control ropes apart from each other so as to smoothly expand or lift the curtain.

A window blind includes a headrail, a controller, a rotating rod, a pivoting member, a blind body, a bottom rail, two lift cord sets, two tilt cord sets and two cord winding assemblies. With the technical feature that the rotating rod and the tilt members of the cord winding assemblies are arranged in the same axial direction in sequence, the effect of almost synchronous rotation can be achieved, thereby optimizing the complexity of the overall blind window components or related parts.

A window blind includes a headrail, a controller, a rotating rod, a pivoting member, a blind body, a bottom rail, two lift cord sets, two tilt cord sets and two cord winding assemblies. With the technical feature that the rotating rod and the tilt members of the cord winding assemblies are arranged in the same axial direction in sequence, the effect of almost synchronous rotation can be achieved, thereby optimizing the complexity of the overall blind window components or related parts.

A window blind includes a headrail, a control device mounted in the headrail, a rotating rod, a blind body, a bottom rail, two lift cords, and two cord winding assemblies mounted on the rotating rod. Subject to the technical feature that the lift cords have the respective one ends thereof connected to the sliding guides of the respective cord winding assemblies and the respective other ends thereof extending along the respective lead angle sections of the respective openings of the respective rotating members and connected to the respective cord insertion holes of the headrail, when the blind body is in the unfolded or folded state, the clamping force produced on the lift cords between the sliding guides and the openings of the respective rotating members can be reduced, preventing the lift cords from being pushed down to break, which greatly increases the service life of the window blind.

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 battery-powered motorized window treatment for covering at least a portion of a window may be adjusted into a service position to allow for access to at least one battery that is powering the motorized window treatment. A headrail of the motorized window treatment may be adjusted to the service position to allow for easy replacement of the batteries without unmounting the headrail and without requiring tools. The motorized window treatment may comprise brackets having buttons that may be actuated to release the headrail from a locked position, such that the head rail may be rotated into the service position. The headrail easily rotates through a controlled movement into the service position, such that a user only needs one free hand available to move the motorized window treatment into the service position and change the batteries.

A covering for an architectural opening includes a first rail, a second rail adjustably connected to the first rail, and a magnetic retention assembly configured to removably connect the first and second rails. The magnetic retention assembly includes a magnet coupled to one of the first rail or the second rail, and a receiver coupled to the other of the second rail or the first rail, the receiver configured to form a magnetic connection with the magnet.