A driving assembly for window blinds includes a mounting plate, a winding roller and driving wheels that are engaged with one another, at least one first guiding roller, and at least one second guiding roller. An elastic element is elastically wound around the driving wheels, a pull rope has a starting end fixed to the winding roller and is divided into at least two sections, under a first status, the pull rope partially winds around the winding roller then winds around the second guiding roller and the first guiding roller in turns along outer edges of the second and the first guiding rollers; while under a second status, the pull rope disengages from the winding roller, the second guiding roller and the first guiding roller in turns. The driving assembly has simple structure and convenient assembly, and brings effortless and quick operation to pull or lift the window blind.

In one aspect, a slat configured for use with a covering for an architectural structure includes a route slot defined at least partially by a route wall that is recessed relative to one or more outer faces of the slat. Additionally, the recessed route wall further defines a through-hole for passing a cord through the route slot between the opposed outer faces of the slat. By configuring the disclosed route slot in this manner, the dimensions of the through-hole can be significantly reduced while still allowing full tilting of the slat to the closed position, thereby increasing light control and privacy for the associated covering.

In one aspect, a slat configured for use with a covering for an architectural structure includes a route slot defined at least partially by a route wall that is recessed relative to one or more outer faces of the slat. Additionally, the recessed route wall further defines a through-hole for passing a cord through the route slot between the opposed outer faces of the slat. By configuring the disclosed route slot in this manner, the dimensions of the through-hole can be significantly reduced while still allowing full tilting of the slat to the closed position, thereby increasing light control and privacy for the associated covering.

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 curtain includes a headrail and a covering structure. The headrail has a bottom wall, two stand walls connected with two opposites sides of the bottom wall, and a light-blocking portion protruding downwards from a junction of the bottom wall and one of the stand walls. The covering structure is positioned under the headrail and has a ladder tape and a plurality of slats. The ladder tape has two vertical cords and a plurality of traverse cords connected between the vertical cords and arranged in an equally-spaced manner along the vertical cords. The slats are held by the traverse cords in a one-to-one manner so as to be tilted by the ladder tape for providing a light-blocking effect. When the slats are tilted, a part of a topmost slat is covered by the light-blocking portion of the headrail to solve the problem of light leakage.

A window curtain includes a headrail and a covering structure. The headrail has a bottom wall, two stand walls connected with two opposites sides of the bottom wall, and a light-blocking portion protruding downwards from a junction of the bottom wall and one of the stand walls. The covering structure is positioned under the headrail and has a ladder tape and a plurality of slats. The ladder tape has two vertical cords and a plurality of traverse cords connected between the vertical cords and arranged in an equally-spaced manner along the vertical cords. The slats are held by the traverse cords in a one-to-one manner so as to be tilted by the ladder tape for providing a light-blocking effect. When the slats are tilted, a part of a topmost slat is covered by the light-blocking portion of the headrail to solve the problem of light leakage.

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 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.

An integrated building photovoltaic apparatus for closing an opening on a building facade and generating electricity from a solar radiation which pass through the opening, includes at least two panes that are at least partially transparent and joined to each other by an interposed spacer to form an internal chamber therebetween; a blind arranged inside the internal chamber and having movable photovoltaic slats to vary the amount of the solar radiation passing through the opening; and connection elements, configured to pull or push the photovoltaic slats. Each slat has a photovoltaic sheet with interconnection grooves which define thin film solar cells monolithically connected in series.

The thin film solar cells include at least two coupling thin film solar cells, each one having a through hole and a close-pattern isolation groove surrounding the through hole to define an inactive area of the coupling single thin film solar cell surrounding the through hole.

A curtain hanging assembly that consists of a curtain assembly able to effect horizontal opening and closing of curtains, and includes two elastic motor units provided with elastic feedback. Interactive dynamics between the two elastic motor units, through linear linkage, respectively cause torque forces produced to be in mutual opposition, enabling the let down area of the curtains to be naturally fixed at any height position.