A one-way driving mechanism for a cordless window blind essentially includes two volute spring gears, which are meshed with each other, and a volute spring connected between the volute spring gears. The volute spring gears each meshes with a cord gear. Each of the cord gears is connected with a cord, which is encircled with a single loop by a clutch wheel. Each clutch wheel is provided therein with a position-securing member.

A slat includes two through holes each provided at its periphery wall with a first wall surface and a second wall surface. First and second teeth protrude from the front and rear ends of the first wall surface towards the second wall surface. The distances between the first and second teeth and the second wall surface are smaller than the diameter of a lifting cord. A third tooth staggered with the first tooth and a fourth tooth staggered with the second tooth protrude from the front and rear ends of the second wall surface towards the first wall surface. The distances between the third and fourth teeth and the first wall surface are smaller than the diameter of the lifting cord. As such, the slat prevents a rope loop from being enlarged for enhancing the safety of use.

A window blind, wherein each ladder tape thereof includes two longitudinal cords, plural bearers and plural limiting members. The longitudinal cords each have an end connected to a deflecting mechanism disposed on the upper rail. The bearers are disposed between the two longitudinal cords for respectively supporting the slats. The limiting members include a first limiting member and a second limiting member neighboring thereto. The first limiting member has an end disposed on one of the longitudinal cords and includes a first slat-through portion located between two ends thereof passing through a first through hole of a first slat. A first linking loop is formed after the first slat-through portion passes through the first through hole. The second limiting member passes through the first linking loop for keeping the first through hole threaded through by one of the first limiting member and the second limiting member.

A covering for an architectural feature having generally horizontal vane elements extending between generally inner and outer vertical support members that can adjust and control the amount and quality of light transmitted through the covering is described. In one embodiment, the covering has elongate tapes as vertical support members that have a width substantially less than the length of the vane elements, and adjacent inner and adjacent outer elongate tapes are separated by a distance. In one embodiment, the vane elements are multi-layered, cellular vanes. The elongated multilayered vanes may include elongate stiffeners that may be associated with, coupled to, and or inserted within pockets formed in, the multilayered vanes. Also disclosed is a method of operation and manufacture.

A covering for an architectural feature having generally horizontal vane elements extending between generally inner and outer vertical support members that can adjust and control the amount and quality of light transmitted through the covering is described. In one embodiment, the covering has elongate tapes as vertical support members that have a width substantially less than the length of the vane elements, and adjacent inner and adjacent outer elongate tapes are separated by a distance. In one embodiment, the vane elements are multi-layered, cellular vanes. The elongated multilayered vanes may include elongate stiffeners that may be associated with, coupled to, and or inserted within pockets formed in, the multilayered vanes. Also disclosed is a method of operation and manufacture.

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.

The invention relates to an assembly of a tilt control cord (106) and a fastening element (1) for fastening to a slat (102A) of a window covering. The fastening element has an elongate body with a length corresponding to the width of the slat. The fastening element includes second fastening means for attaching the ends of the tilt control cord.

The invention also relates to a window covering having a cord spool (104), wherein the tilt control cord (106) is wrapped around the cord spool (104) and extends to the top slat (102A) on which the fastening element (1) is attached.

The invention also relates to a method of assembling the window covering.

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.

The present invention relates to a blind blade assembly for solar photovoltaic power generation including solar cells installed on one side thereof to enable solar photovoltaic power generation. In the blind blade assembly of the present invention, solar cells are provided in a prefabricated form, allowing the solar cells to be replaced and repaired individually. The blind blade assembly for solar photovoltaic power generation according to the present invention includes a blade frame 210 provided with a mounting groove 211; a plurality of solar cell panels 220 disposed in the longitudinal direction in the mounting groove 211; and fixing members 230 for connecting electrodes 223 between the solar cell panels 220 and for fixing seams.

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.