An actuation device for the slats of a wing of a shutter has two sections intended to be mounted in the uprights of a frame of the wing, a plurality of flanges that are rotatably mounted in holes obtained in the sections, and locking devices disposed in such a way to hold the flanges and prevent the flanges from coming out of the holes of the section.

A window shade includes a top box, a bottom bar and a shade connected between the top box and the bottom bar. Multiple wire units extend through holes of the shade. Each wire unit includes two connection wires and multiple cross wires which are spaced and transversely connected between the connection wires. Each wire unit has an operation wire for controlling the shade, the operation wire alternatively extends between the cross wires along the longitudinal direction of the shade. The holes in the shade each include two passages formed at two inner ends thereof. The connection wires extend through the two passages. At least one tooth extends from each of two insides of each of the holes and located between the two passages. When the wire unit is pulled outward, the cross wires are restricted by the teeth so that the operation wire is restricted from being pull out.

A window shade includes a top box, a bottom bar and a shade connected between the top box and the bottom bar. Multiple wire units extend through holes of the shade. Each wire unit includes two connection wires and multiple cross wires which are spaced and transversely connected between the connection wires. Each wire unit has an operation wire for controlling the shade, the operation wire alternatively extends between the cross wires along the longitudinal direction of the shade. The holes in the shade each include two passages formed at two inner ends thereof. The connection wires extend through the two passages. At least one tooth extends from each of two insides of each of the holes and located between the two passages. When the wire unit is pulled outward, the cross wires are restricted by the teeth so that the operation wire is restricted from being pull out.

A spring drive system for a cordless window shade includes multiple rotary drums respectively connected with suspension cords, and one or more springs respectively connected with the rotary drums. The rotary drums are operatively connected with each other, so that they can synchronously rotate to wind and unwind the suspension cords. Moreover, each of the rotary drums is connected with an end of one spring. The spring torque can act to sustain a bottom part of the window shade at any desired height, and drive rotation of the rotary drums to wind the suspension cords when the bottom rail is raised upward.

A spring drive system for a cordless window shade includes multiple rotary drums respectively connected with suspension cords, and one or more springs respectively connected with the rotary drums. The rotary drums are operatively connected with each other, so that they can synchronously rotate to wind and unwind the suspension cords. Moreover, each of the rotary drums is connected with an end of one spring. The spring torque can act to sustain a bottom part of the window shade at any desired height, and drive rotation of the rotary drums to wind the suspension cords when the bottom rail is raised upward.

A magnetic blind device includes boards. The boards are stacked in a vertically oriented arrangement. The boards have openings through the boards. A top board is higher than a bottom board. An elevation line passes through the openings of the boards from the top board to the bottom board. The elevation line is for raising the blinds. Magnetic strips can be mounted to a left side and a right side of each board of the boards. A metal strip can be positioned to contact the plurality of magnetic strips when the plurality of magnetic strips transfers from a dormant position to an activated position. The magnetic strips attract to each other and to the metal strip. Optionally, an electromagnet can selectively magnetize the metal strip when an electromagnet switch is activated. The magnet strip is preferably rectangular.

A magnetic blind device includes boards. The boards are stacked in a vertically oriented arrangement. The boards have openings through the boards. A top board is higher than a bottom board. An elevation line passes through the openings of the boards from the top board to the bottom board. The elevation line is for raising the blinds. Magnetic strips can be mounted to a left side and a right side of each board of the boards. A metal strip can be positioned to contact the plurality of magnetic strips when the plurality of magnetic strips transfers from a dormant position to an activated position. The magnetic strips attract to each other and to the metal strip. Optionally, an electromagnet can selectively magnetize the metal strip when an electromagnet switch is activated. The magnet strip is preferably rectangular.

A safety window blind includes a headrail, a blind body and two control units. Each control unit has a spacer cord having a plurality of cord loop units, a plurality of rings, and a control cord passing through the rings, being operable to retract and expand the blind body, and having a plurality of holding segments. Each of the cord loop units has first and second cords respectively forming first and second loops. For each holding segment and a corresponding cord loop unit, the holding segment has a first extending section passing through the first loop, a first turning section bent around the second cord, a second turning section bent around the first cord, and a second extending section passing through the second loop.

A safety window blind includes a headrail, a blind body and two control units. Each control unit has a spacer cord having a plurality of cord loop units, a plurality of rings, and a control cord passing through the rings, being operable to retract and expand the blind body, and having a plurality of holding segments. Each of the cord loop units has first and second cords respectively forming first and second loops. For each holding segment and a corresponding cord loop unit, the holding segment has a first extending section passing through the first loop, a first turning section bent around the second cord, a second turning section bent around the first cord, and a second extending section passing through the second loop.

The present disclosure describes roll-up coverings of custom length and/or width for architectural openings, and a method of assembling the same. The custom covering includes at least one outer elongate tape, at least one inner elongate tape, and a plurality of slats. The tapes preferably have lengths along central longitudinal axis extending between first ends and second ends of the tapes that are selected to correspond to the custom length of the covering. The slats are preferably transverse to, spaced apart along, and coupled to the tapes at any desired location along the tape lengths to achieve desired spacings of the slats, thereby providing a subassembly of custom length. The slats may have lengths extending between first ends and second ends of the slats, orthogonal to the central axis of the tapes, and selected to provide a custom width of the subassembly.