EP3564474A1 - Blind with slats - Google Patents

Abstract

The invention relates to a venetian blind consisting of slats having an orientable reflective inner face mounted on a cable system connected to a control for shifting the cables supporting the front of the slats relative to the cables supporting the rear of the slats (10 to 13 ). Said slats (10 to 13) are orientable ensuring the reflection of external light, the internal transverse edge of said slats (10 to 13) being extended by an opaque strip (30 to 32), on the rear plane of the blind, the front edge of the sipe carrying said opaque strip, and the rear edge of the adjacent lower sipe.

Description

Field of the invention

The present invention relates to the field of lamellar blinds called "venetian blinds" for the shading of windows and the adjustment of brightness in a room lit by windows. These blinds consist of horizontal slats parallel to each other that is oriented by means of cords.

A Venetian blind can hide the light and modulate the brightness while controlling the ability to see or be seen.

However, in a ground floor, by directing the slats upwards, with a conventional Venetian blind, when the slats are oriented upwards, it is difficult for the light to penetrate into the center of the room.

State of the art

It is known in the state of the art the international patent application WO / 2010/125258 describing a solution of covering one side of the lamellae of a blind or adjustable shutters with an absorbent surface and the other side with a reflective surface to absorb or reflect heat in the selected orientation. This amounts to installing a natural air conditioning while letting in light.

The Japanese patent application JP2011179225 describes another example of how to let sunlight pass through a greenhouse that varies seasonally. The blind consists of flat wooden slats having a reflective film glued to the upper surface of the slat. Sunlight is transmitted into the greenhouse by adjusting the angle of each slat.

We also know in the state of the art the US patent US2155985 describing a venetian blind formed of rigid reflective strips folded to form two wings forming between them a constant angle of about 145 °.

Disadvantages of prior art

For habitats in dark alleys, the solutions of the prior art are unsatisfactory because the sunlight can hardly penetrate the rooms, when the neighboring building is very close. Moreover, it is very difficult to preserve in such situations of proximity of the buildings intimacy by venetian blinds according to the state of the art. Indeed, to let a minimum of light, it is necessary to reduce the level of occultation.

Solution provided by the invention

In order to overcome this drawback, the present invention relates, in its most general sense, to a venetian blind according to claim 1.

Detailed description of a non-limiting example of the invention

• la figure 1 représente une vue schématique en coupe d'une fenêtre équipée d'un store selon l'invention.
• la figure 2 représente un exemple d'articulation de deux lamelles consécutives.
• la figure 3 représente un exemple d'une variante de réalisation.

The present invention will be better understood on reading the detailed description of a nonlimiting example of the invention which follows, with reference to the appended drawings in which:

• the figure 1 is a schematic sectional view of a window equipped with a blind according to the invention.
• the figure 2 represents an example of articulation of two consecutive lamellae.
• the figure 3 represents an example of an alternative embodiment.

General description

The figure 1 represents an example of a window constituted by a frame (1) provided with a transparent glazing (2).

The blind consists of strips (10 to 13) supported by cords (45, 46).

Each slat has a reflective upper surface returning sunlight to the interior of the room. The goal is to give visibility of the sky from a room, even when the direct vision does not allow it. The slats (10 to 13) may be parallel to each other, or have different inclinations.

The inner longitudinal edge of each strip (10 to 12) is extended by an opaque flexible strip (30 to 32), for example made of fabric. These flexible strips (30 to 32) fall vertically to obscure the direct vision, and protect privacy, while allowing the penetration of sunlight. Alternatively, these strips (30 to 32) may consist of rigid blades hinged to allow a tilting relative to the front edge (the inner side) of the strip (10 to 12) they extend.

These strips prevent vision in the room from the outside, from a point of view located at the same level as the opening. The view is masked on the one hand by the opaque and reflective lamellae alternating with these opaque strips.

Articulation of the slats

The figure 2 represents a schematic view of the connection between two consecutive strips (10, 11).

The lower blade (11) has on its lower surface a coil (42) whose rotation makes it possible to modify the gap between the consecutive lamellae (10, 11) and substantially maintaining their parallelism. The orientation of the slats is done by modifying the inclination of one of the upper slats (10), which causes the pivoting of the lower lamellae (11) at a substantially identical angle.

Changing the gap between two lamellae (10, 11) is achieved by adjusting the length of a wire (43) wound around the coil (42). This wire (43) passes through a left rear hole (14) of the lower blade (11), in which it slides freely, to go up to a left rear hole (15) of the upper blade (10). It then runs along the rear edge of the upper leaf (10) to pass through a right rear hole (16), in which it also slides freely, to descend to the right rear hole (17) of the lower leaf (11) in which it also slides freely to come on a fixed point (18), for example a washer (19) blocked by a screw. This fixed point (18) makes it possible to adjust the length of wire during the installation of the blind, temporarily releasing the washer to allow the movement of the wire (43) with respect to this fixed point (18).

The wire (43) extends after this fixed point (18) to emerge through a right front hole (21) of the lower blade (11), then back to pass through a right front hole (22) of the upper blade (10). ); then along the front edge of the upper leaf (10) and through a left front hole (23) of the top leaf (10). The wire (43) then descends to the lower blade (11) to pass through a left front hole (24) and join a second fixed point, also comprising a washer for adjustment.

It is understood that the description above is a non-limiting example. It is possible to invert the references "right" and "left".

Furthermore, the end of the wire (43) can be blocked not by a fixed point with a washer but directly at the left front hole (24) of the lower blade (11).

Realization variant

The figure 3 represents an alternative embodiment. The slats (10 to 12) provided with a mirror are adjustable by a system consisting of a first wire taut (100) on the side of the window and a second wire (250) side piece.

Each lamella (10 to 12) has at its ends transverse rods (101, 102; 111, 112; 121, 122).

The window-side rods (101, 111, 121) are fixed at predetermined heights, with a constant pitch, on the first wire (100), with a degree of freedom in pivoting.

A wire (401) passes below the part-side rod (102), extends to the side window rod (101) which it bypasses, before ending at the point of attachment (300). Alternatively it can also return to the upper surface of the rod side piece (102) and end unbalance (301).

A second wire (402) passes below the part-side rod (112), extends to the side-window rod (111) which it bypasses, before terminating at the point of attachment (310), and thus after.

The flexible strips (30, 31) are attached to the wires (401, 402) and have a transverse unbalance (301, 311).

When the orientation of the slats (10, 11, 12) is changed by acting on the wire (250), the movement of the wire (401, 402) causes the flexible strips (30, 31) to rise or fall relative to the inside edge of the mirror.

The mirrors are suspended from the wires (100) and (250). The wire (200) serves to maintain the visible portion of the curtains constant height relative to the wire (100) and this regardless of the inclination of the mirror. This wire (200) is also used to cause the rise of the curtain behind the mirror. It does not keep the mirrors

• le côté intérieur des miroirs baisse et change donc l'inclinaison des miroirs
• les fils (100) et (200) restent à la même hauteur
• ceci provoque la sortie du fil (401) sous la tige (102), le fil (401) étant fixé au balourd/tige supérieure dont la position est fixe, car fixé au fil (200) qui reste à hauteur constante.
• En contrepartie, une partie du rideau "remonte" et se cache sous le miroir car ce rideau étant fixé au fil (401) au point de fixation (300)
• la partie du rideau qui est resté visible ne change pas sa hauteur par rapport aux fil (100) et (200) reste fixe
• Par rapport au bord intérieur des miroirs, on peut considérer que les rideaux montent et descendent (en rentrant et sortant du dessous du miroir).

To summarize, here is what happens when you drop the thread (250):

• the inner side of the mirrors drops and thus changes the inclination of the mirrors
• the wires (100) and (200) remain at the same height
• this causes the output of the wire (401) under the rod (102), the wire (401) being fixed to the upper unbalance / rod whose position is fixed, because fixed to the wire (200) which remains at constant height.
• In return, a part of the curtain "goes up" and hides under the mirror because this curtain is fixed to the wire (401) at the point of attachment (300)
• the part of the curtain that has remained visible does not change its height with respect to the thread (100) and (200) remains fixed
• Compared to the inner edge of the mirrors, we can consider that the curtains go up and down (entering and leaving the underside of the mirror).

Claims (5)

Venetian blind consisting of lamellae having a reflective inner face characterized in that said strips (10 to 12), the inner transverse edge of said strips (10 to 12) being extended by an opaque strip (30 to 32) falling vertically. Venetian blind according to claim 1 characterized in that said opaque strips (30 to 32) are formed by a flexible opaque material. Venetian blind according to claim 1 characterized in that said opaque strips (30 to 32) are formed by a rigid blade. Venetian blind according to claim 1 characterized in that the orientation of the slats is chosen to provide a reflection of the outer light in a direction forming an angle of between 100 ° and 45 ° relative to the vertical plane. Venetian blind according to claim 1 characterized in that said strips are orientable and are mounted on a cable system for shifting the cables supporting the front of the slats relative to the cables supporting the rear of the slats (10 to 12).

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