EP3138988A1 - Glazing provided with a concealment curtain - Google Patents

Abstract

A glazing unit (100) comprises at least two transparent sheets (10, 12) connected at their edge by a frame (14), and delimiting between them a spacer space (16), an occulting curtain (20), able to be moved in a longitudinal direction (Y) within the intermediate space (16), and a system for actuating said curtain. A first end (20a) of the curtain (20) is integral with a winding axis (22) extending in a lateral direction (X) orthogonal to the longitudinal direction, the curtain (20) being wrapped around the winding axis (22). The actuating system comprises means for driving the first end in translation in the longitudinal direction (Y), and means for guiding the first end in translation in the longitudinal direction (Y).

Description

TECHNICAL AREA

The present disclosure relates to a glazing unit and in particular to an insulating glazing unit (in particular a double or triple glazing unit) of the type comprising at least two transparent sheets connected to their edge by a frame.

The present disclosure relates, more specifically, a glazing of this type equipped with an occulting device disposed in the interspace between the transparent sheets.

BACKGROUND OF THE INVENTION

The constant desire to reduce energy expenditure, particularly in the construction sector, has led to the development of glazing that regulates the supply of light and heat inside buildings.

Glazing incorporating blackout devices have been developed for several years, these windows offering the advantage of being aesthetic, durable, hygienic and easy to maintain.

For example, glazing units equipped with a curtain mounted around a winding axis fixed in the upper part of the glazing and around which the curtain is able to wind and unwind are known.

With this type of device, it has been found that the unwinding curtain often hit the sheets of the glazing, which, by force, can damage it. In addition, the curtain sometimes remains stuck, especially when its winding / unfolding is unevenly over its width. For these reasons, existing glazing with integrated curtains is not considered to be really reliable.

OBJECT AND SUMMARY OF THE INVENTION

One of the objectives of the present invention is to provide a glazing unit with an integrated blackout curtain, which is more reliable than the windows known to date.

• au moins deux feuilles transparentes reliées à leur bord par un cadre, et délimitant entre elles un espace intercalaire,
• un rideau occultant apte à être déplacé dans une direction longitudinale à l'intérieur de l'espace intercalaire, et
• un système d'actionnement dudit rideau,

le vitrage étant caractérisé en ce qu'une première extrémité du rideau est solidaire d'un axe d'enroulement s'étendant dans une direction latérale orthogonale à la direction longitudinale, le rideau étant enroulé autour de l'axe d'enroulement, et le système d'actionnement comporte des moyens d'entraînement de la première extrémité en translation dans la direction longitudinale, et des moyens de guidage de la première extrémité en translation dans la direction longitudinale.This objective is achieved with glazing comprising

• at least two transparent sheets connected to their edge by a frame, and delimiting between them an interspace,
• an occulting curtain adapted to be moved in a longitudinal direction within the interspace, and
• a system for actuating said curtain,

the glazing being characterized in that a first end of the curtain is integral with a winding axis extending in a lateral direction orthogonal to the longitudinal direction, the curtain being wound around the winding axis, and the actuating system comprises means for driving the first end in translation in the longitudinal direction, and means for guiding the first end in translation in the longitudinal direction.

In this specification, unless otherwise stated, a transparent body is to be understood as a body having the property of allowing light to pass through. A transparent body can be really transparent (in the sense that we can clearly distinguish the objects through) or translucent.

Furthermore, in the present disclosure, a sheet is a thin and generally flat assembly, made of any transparent material or combination of suitable transparent materials, in particular glass and / or plastic.

It is understood that the glazing according to the invention is not limited to double glazing, but can be any type of multiple glazing comprising at least the claimed structure optionally supplemented with other (transparent) layers arranged in front of one or each of two transparent sheets.

Typically, the interspace between the two transparent sheets forms a gas strip, generally air or a gas that is less heat-conductive than air and which makes it possible to limit the losses due to conduction or convection, for example argon or krypton.

The blackout curtain can be made of any material or combination of materials which makes it possible to give it occulting properties (ie reflecting or absorbing the sun's rays) on at least a part of its surface, and preferably in a distributed manner over the whole of its surface.

The curtain is biased in a state wrapped around the winding axis.

By winding axis, here means a material axis or winding shaft.

The winding curtain biasing means around this axis are either separate means of the curtain, for example at least one spring (coupled to the winding axis or the curtain), or means intrinsic to the curtain. In the latter case, it is said that the curtain is self-winding.

By self-winding curtain, is meant in the present application, a curtain which, in the absence of external stresses, is in its winding position.

A self-winding curtain is for example formed by superposition and heating of two layers made of materials having different thermal expansion coefficients. The stress resulting from the differential expansion of the two materials constantly forces the curtain into its wound state. This effect, also known as the bimetallic effect, can also be obtained without heat treatment, by some particular manufacturing processes (layer deposition).

According to one example, the self-winding curtain comprises a polyethylene terephthalate (PET) or ethylene polynaphthalate (PEN) substrate covered with a layer of metal or metal oxide, for example oxide of indium-tin (ITO).

In the present description, unless otherwise stated, the longitudinal direction is the desired direction of movement of the curtain.

Displacement means here its translation in a given configuration (including constant length), and / or its deployment / retraction (by increasing / decreasing its length, in other words by winding / unwinding).

This longitudinal direction Y is generally parallel to the planes of the transparent sheets.

We also define a lateral direction X perpendicular to the longitudinal direction Y, and generally parallel to the planes of the transparent sheets.

We will generally measure the width of an element in the lateral direction, its height or its length in the longitudinal direction and its thickness, in a transverse direction orthogonal to the lateral and longitudinal directions.

In the present application, a transverse plane must also be understood as a plane orthogonal to the lateral direction.

The median plane of the curtain is then defined as the transverse plane passing through the middle of the curtain in the lateral direction.

Finally, unless otherwise stated, the upper and lower adjectives are used with reference to the direction of the Y axis as shown in the figures.

In general, the curtain has a first end close to the winding axis of the curtain, and a second end opposite said first end in the longitudinal direction.

The guide means are intended to guide the movement of the winding axis of the curtain in the longitudinal direction. The curtain is stretched permanently between its two ends (on non-rolled portions). The second end of the curtain is for example fixed to a support (fixed or movable) and the first end of the curtain is integral with the winding axis, itself guided in translation. The curtain is thus preserved from shocks against the sheets of the glazing.

According to a particular arrangement, the first end of the curtain is fixed to the winding axis, for example by gluing, and the winding axis is rotatably mounted about its axis.

According to one example, the guide means comprise at least one (primary) guide cable which is integral or on which is mounted movable the first end of the blackout curtain or a support assembly integral with said end.

Generally, the (primary) cable extends parallel to the transparent sheets, and, at least in part, parallel to the longitudinal direction.

In the case where the first end of the blackout curtain or a support assembly integral with said end is secured to the primary cable, the latter may for example be a so-called useful strand of a belt. The end moving in solidarity with the belt, the occulting device is guided and prevented from colliding against the transparent sheets.

By belt, generally means any system comprising a band closed on itself around at least two pulleys, the band can take any suitable form (a cable, a wire, a chain, a flat strip, etc.).

According to a preferred arrangement, the guide means are configured to guide the first end symmetrically on either side of the median plane of the curtain. Thus, the winding axis remains permanently orthogonal to the longitudinal direction of movement of the curtain.

For this, the guide means may comprise at least two (primary) guide cables.

According to one example, the guide means comprise at least two guide cables arranged, at least in part, on either side of the median plane of the blackout curtain, and of which is integral or on which is mounted movable the first end of the curtain occulting or a support assembly secured to said end.

They may in particular be arranged symmetrically with respect to the median plane of the curtain.

In one example, the guide means comprise at least two belts adapted to be moved simultaneously and each having a useful strand forming a guide wire, the first end of the blackout curtain being integral with said useful strands.

To enhance the reliability of the system, and preserve the integrity of the curtain, the glazing may include a housing housing the winding axis of the curtain.

In this case, the housing can be fixed or mounted to move on said at least one cable and have a slot extending laterally and traversed by a curtain thickness.

These arrangements also improve the aesthetics of the system, hiding the winding axis and the curtain portion wrapped around the axis.

To improve its stability, the primary housing may comprise at least one guide opening adapted to the passage of a guide cable (including a cable sliding in said opening).

In the case where the primary guide wire forms a strand (said useful) of a primary belt which is secured to the housing, then the opening guide can be used to pass a so-called passive strand of the same belt.

According to one example, the drive means comprise a magnetic drive system, comprising at least one outer member adapted to be moved along an outer face of the glazing unit, and at least one inner member integral with one of the first and second end of the blackout curtain, the outer member and the inner member being adapted to cooperate by magnetic effect. In one example, the outer and inner members are magnets. In another example, one of the outer member and the inner member is a magnet, and the other is a magnetic material member. For the purposes of the present invention, magnetic material is understood to mean a material which has the property of being magnetized under the effect of an external magnetic field (for example they are elements based on iron, cobalt, nickel or their alloys. , especially steels). The outer member and the inner member are magnetically attracted to each other. To operate the curtain, the user has only to move the outer member along the glazing. With this magnetic drive system, it is no longer necessary to drill the frame of the glazing to pass power cables into the interspace. The interstitial space is perfectly insulated from the outside, avoiding moisture problems inside the glazing.

Another solution consists in providing electric drive means comprising at least one electric motor.

For example, the electric motor can be powered by a photovoltaic module, the electric motor and the photovoltaic module being both housed in the interspace of the glazing. It has been demonstrated that the energy stored by a photovoltaic module disposed in the intermediate space is largely sufficient for the actuation of the curtain, in normal use.

Preferably, the actuating system comprises in this case a remote control system of the electric motor, for example a bluetooth system.

According to another variant, the drive means comprise a mechanical drive system comprising for example a crank disposed outside the interspace. (Accessible to the user), and in particular a crank mechanically connected, by transmission means, to at least one guide wire, the actuation of the crank driving said cable.

The glazing according to the invention may also comprise means for locking the first end of the curtain in the longitudinal direction. These means may, if necessary, be arranged on the housing housing the winding axis of the curtain. They may for example include springs, including springs having several stop positions, or pawls.

In one example, the second end of the curtain opposite the first end is fixed to the frame of the glazing. In other words, the second end of the curtain can not move relative to the frame.

According to another example, the actuating system comprises drive means of the second end of the curtain opposite the first end, in translation in the longitudinal direction, and means for guiding the second end of the curtain in translation in the longitudinal direction.

It is understood that both ends of the curtain can thus be moved. The glazing can thus be obscured on a predefined height portion, located at a distance from each longitudinal edge of the frame. In particular, the user can hide only the part of the glazing that needs to be (for example to avoid being dazzled by the sun), without significantly reducing the lighting of the room.

According to one example, the driving means of the actuating system comprise a first drive system of the first end of the device occulting in translation in the longitudinal direction and a second drive system of the second end of the device occulting in translation. in the longitudinal direction, said first and second systems being adapted to be actuated independently of one another.

The second drive system may for example be a magnetic system, an electrical system or a mechanical system as defined above.

According to an example, the second end of the curtain is integral with a support assembly, and the drive means are adapted to driving said support assembly in the longitudinal direction and the guide means are adapted to guide in translation said support assembly.

A support assembly generally extends in the lateral direction. It includes for example an axis, a bar, a housing, or a combination of such elements.

For example, the guide means of the second end comprise at least one secondary guide cable which is secured or on which is mounted movable the second end of the blackout curtain or a support assembly integral with said end.

Preferably, the guide means of the second end are configured to guide the second end of the curtain symmetrically on either side of the median plane of the curtain.

According to one example, the means for guiding the second end comprise at least two secondary belts adapted to be moved simultaneously and each comprising a useful strand forming a secondary guide wire, the second end of the blackout curtain being integral with said useful strands.

Several modes or examples of embodiments are described in this presentation. However, unless otherwise specified, the features described in connection with any one embodiment or embodiment may be applied to another embodiment or embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS

• La figure 1 illustre un vitrage selon un premier mode de réalisation, en perspective et en coupe transversale, partiellement arrachée ;
• La figure 2 est une vue en coupe transversale selon le plan II de la figure 1 ;
• La figure 3 est une vue plus détaillée, en perspective, du boîtier de la figure 1 ;
• La figure 4 est une vue en coupe selon le plan IV de la figure 3 ;
• La figure 5 est une vue plus détaillée, en perspective, du système d'actionnement de la figure 1 ;
• La figure 6 est une vue en perspective d'un vitrage selon un deuxième mode de réalisation;
• La figure 7 est une vue en coupe transversale d'un vitrage selon un troisième mode de réalisation ;
• La figure 8 est une vue en coupe transversale d'un vitrage selon un quatrième mode de réalisation ;
• La figure 9 est une vue plus détaillée, en perspective, du système d'actionnement de la figure 8.

The invention will be better understood and its advantages will appear better on reading the detailed description which follows, of several embodiments shown by way of non-limiting examples. The description refers to the accompanying drawings in which:

• The figure 1 illustrates a glazing according to a first embodiment, in perspective and in cross section, partially broken away;
• The figure 2 is a cross-sectional view along plane II of the figure 1 ;
• The figure 3 is a more detailed view, in perspective, of the case of the figure 1 ;
• The figure 4 is a sectional view along plane IV of the figure 3 ;
• The figure 5 is a more detailed perspective view of the actuation system of the figure 1 ;
• The figure 6 is a perspective view of a glazing according to a second embodiment;
• The figure 7 is a cross-sectional view of a glazing according to a third embodiment;
• The figure 8 is a cross-sectional view of a glazing according to a fourth embodiment;
• The figure 9 is a more detailed perspective view of the actuation system of the figure 8 .

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

On the figure 1 , there is shown a double glazing 100 according to a first embodiment of the invention, comprising a first transparent sheet 10 and a second transparent sheet 12 parallel, here glass, spaced from one another and assembled on board by a continuous frame 14 forming a spacer, typically having a spacer 15.

The frame 14 delimits, between the sheets 10, 12, a spacer space 16, for example containing air, and whose sealing is ensured, in a manner well known per se, by a seal 18, in particular made of silicone, between the glass sheets 10, 12 and all around the spacer 15.

The interspace 16 houses a blackout curtain 20, here self-winding type, that is to say, naturally in a wound position.

The curtain 20 typically has a width of between 0.2 and 2 meters and a length of between 0.5 and 3 meters.

It is for example formed by superposition and heat treatment of a first layer of polyethylene terephthalate (PET) with a thickness of between 10 and 50 microns, and a second layer of metal, in particular ITO, of thickness between 50 and 500 nm. According to one variant, the first layer could also be ethylene polynaphthalate (PEN). The heating causes a differential expansion of the superimposed layers, inducing in the curtain a constraint tending to bring it back naturally into its wound state.

As will be described in the following, the curtain 20 is able to be moved in a longitudinal direction or displacement Y.

For the curtain 20 is defined a first end 20a (lower in the example shown), the closest to its winding axis-in other words, the closest to the axis of the roll formed by the curtain in the wound state. and a second end 20b (upper in the illustrated example), opposite the first end 20a (see figure 2 ).

As illustrated on the figure 2 the first end 20a of the curtain 20 is integral with a first support assembly 21 comprising a winding axis 22, for example of metal, extending in a lateral direction X orthogonal to the longitudinal direction Y, and parallel to the sheets 10 , 12 and at the longitudinal edges 14a, 14b of the frame 14. Note that by integral means here integral in translation in the longitudinal direction Y. For example, the first end 20a is fixed to the winding axis, for example by screwing or, preferably, by gluing.

The curtain 20 is naturally in a position wound around this winding axis 22.

For example, the diameter of the winding axis 22 is between 1 and 4 mm and the maximum diameter of the curtain 20 in the state wound around the axis 22, between 2 and 8 mm.

In the particular example shown, the first support assembly 21 also comprises a housing 50, here of parallelepipedal shape, housing the winding axis 22.

The housing 50, which is for example made of metal, has at its lateral ends bearings 52, in particular ball bearings, adapted to support and ensure the rotational guidance of the lateral ends of the winding axis 22. The axis of winding 22 is thus rotatably mounted relative to the housing.

As illustrated on Figures 3 and 4 a slot 54, elongate and parallel to the winding axis 22, is formed in one of the faces of the housing 50 to allow the curtain 20 to pass.

The second end 20b of the curtain 20 is fixed to the frame 14, for example by gluing. In the example, the second end 20b of the curtain 20 is more particularly fixed to the upper longitudinal edge 14b of the frame 14. The system could however be reversed: the second end 20b of the curtain would then be fixed to the lower longitudinal edge 14a of the frame 14.

The first end of the curtain and its support assembly 21, are adapted to be translated in the longitudinal direction Y - orthogonal to the lateral direction X - under the effect of a drive system (first drive system) described in more detail. detail in the following, being guided in their translation by a guide system (first guide system). The curtain is thus rolled up or unrolled.

The guidance system is shown in more detail on the figure 5 .

It comprises two primary belts 24, 26 each mounted around a pair of pulleys 28a, 28b, respectively 30a, 30b. A lower pulley 28a, 30a and an upper pulley 28b, 30b of each primary belt 24, 26 will be designated below.

Each belt here is of the parallel type, that is to say provided with two parallel strands extending between the pulleys 28a, 28b; 30a, 30b, the two strands being generally defined in a transverse plane of the glazing.

As illustrated on the figure 2 each pulley is located near one of the longitudinal edges 14a, 14b of the frame 14, so that each belt 24, 26 extends over substantially the entire height of the glazing 100.

According to a preferred arrangement shown in the figures, the two belts 24, 26 are defined in two transverse planes symmetrical with respect to the transverse plane of symmetry of the curtain 20. The parallel guidance is thus symmetrically on both sides of the curtain, avoiding the blockages related to winding or uneven winding of the curtain in the lateral direction X.

The housing 50, on which is mounted the winding axis 22, is attached to a so-called useful strand 24u, 26u of each primary belt 24, 26, for example by screwing or, preferably, by gluing.

The housing 50 further has two pairs of guide openings 56a, 56b; 58a, 58b each adapted to the passage of a so-called passive strand 24p, 26p of each belt 24, 26 (see figures 2 and 3 ).

In the embodiment described, the drive system of the winding shaft is an electrical system driving the primary belts 24, 26.

It comprises an electric motor 40 provided with a remotely controllable control unit 42, a photovoltaic module 44, and a battery 46, housed in the interspace 16.

In the example, the motor 40 is arranged between the two lower pulleys 28a, 30a, each of these pulleys being assembled to the drive shaft 48. The two belts 24, 26 are thus driven simultaneously by the electric motor 40.

The upper pulleys 28b, 30b are also assembled on a common shaft 38.

As illustrated elsewhere on the figure 5 , the shafts 38, 48 of the pulleys 28a, 28b, 30a, 30b are here mounted on a mechanical support structure 32 fixed to the spacer 15, and thus forming a portion of the frame 14.

To actuate the curtain, the user sends to the control unit 42 of the electric motor 40 a winding or unwinding command, for example via a Bluetooth connection. The electric motor 40 drives the belts 24, 26 which, when moving, cause the displacement of the winding axis 22. The curtain 22 being self-winding, it remains permanently tensioned between its winding axis and the point fixing its second end. Thanks to the guidance provided by the belts 24, 26, the curtain is prevented from coming into contact with the sheets 10, 12 of the glazing, and therefore does not risk being damaged.

This example is not, however, limiting.

According to a possible variant, the housing 50 could for example be omitted and the winding shaft 22, attached directly to the primary belts 24, 26.

Moreover, the occulting device is not limited to a self-winding curtain. One could include a spring winding system of a conventional curtain.

The figure 6 illustrates a glazing according to a second embodiment. The elements identical to those described in connection with the previous embodiment are designated by the same reference numerals as in the figures described above. They are not described again.

The glazing 200 differs from that of the previous embodiment in that the drive system is a magnetic system.

The drive system therefore comprises an outer member 60, here a first magnet, adapted to be moved along the outer face of a sheet (here referenced 10) of the glazing, and an inner member, here a second magnet 64 fixed on the housing 50, integral with the winding axis 22 of the curtain 20.

In the example, the outer member 60 is slidably mounted along a rectilinear guide rod 62, extending in the longitudinal direction Y, over all or part of the height of the glazing (generally substantially its entire height).

When the outer member 60 is moved along the sheet 10 by the user, the inner member 64 is driven integrally due to the magnetic attraction force. The winding axis of the curtain 20, attached to the housing 50, is also displaced, causing the curtain to move.

The figure 7 illustrates a glazing according to a third embodiment. The elements identical to those described in connection with the previous embodiment are designated by the same reference numerals as in the figures described above. They are not described again.

First, the glazing 300 differs from that of the previous embodiment in that the guide means of the first and second end of the blackout curtain comprise two fixed cables 124, 126, extending in the longitudinal direction Y and arranged symmetrically. on either side of the median plane of the curtain 20.

The housing 50 is here slidably mounted along said guide cables 124, 126.

To avoid friction, the housing may optionally be provided with rollers (not shown) positioned in contact with the inner face of the sheet 10.

This example is not, however, limiting.

For example, one of the outer member and the inner member could be formed of a magnetic material without being a magnet. In one example, the inner member could be constituted by the housing 50, made of a magnetic material. Also, the inner member could be constituted by the winding axis, made of a magnetic material.

The figures 8 and 9 illustrate a glazing according to a fourth embodiment. The elements identical to those described in connection with the first embodiment are designated by the same reference numerals as in the figures described above. They are not described again.

The glazing 400 differs from those of the previous embodiments in that the second end 20b of the curtain 20 is not secured to the frame 14 of the glazing, but a support assembly 70 can be translated in the longitudinal direction Y being guided in its translation by a second guide system.

In the example, the support assembly is a bar (hereinafter support bar), for example metallic, extending in the lateral direction X.

The second guide system comprises two secondary belts 74, 76 each mounted around a pair of pulleys 78a, 78b, respectively 80a, 80b. A lower pulley 78a, 80a and an upper pulley 78b, 80b of each secondary belt 74, 76 will be designated below.

Each belt here is of the parallel type, that is to say provided with two parallel strands extending between the pulleys 78a, 78b; 80a, 80b, the two strands being generally defined in a transverse plane of the glazing.

According to a preferred arrangement shown in the figures, the two secondary belts 74, 76 are defined in two transverse planes symmetrical with respect to the median plane of the curtain 20.

In the particular example shown, the support bar 70 is attached to a so-called useful strand 74u, 76u of each secondary belt 74, 76, for example by screwing or gluing.

In the example, the drive system of the support bar 70 (second drive system) is an electrical system driving the secondary belts 74, 76.

It comprises an electric motor 82, housed in the spacer space 16. The motor 82 is connected to the battery 46, itself connected to the photovoltaic module 44.

In the example, the motor 82 is disposed between the two upper pulleys 78a, 80a, each of these pulleys being assembled to the drive shaft 86. The two belts 74, 76 are thus driven simultaneously by the electric motor 82.

The axes of the lower pulleys 78b, 80b are mounted on the mechanical support structure 32.

The motors 40 and 82 can be driven by the user, independently of one another. It is therefore possible to move only the first end, only the second end or together the two ends of the curtain, in one or the other direction, as needed.

To actuate the curtain, the user sends control unit 42 a command to move the first and / or the second end, for example via a Bluetooth connection. The curtain 22 being self-winding, it remains permanently tensioned between its winding axis 22 and the support bar 70. Thanks to the guidance provided by the belts 24, 26, 74, 76 the curtain is prevented from coming into contact with the leaves 10, 12 of the glazing, and therefore not likely to be damaged.

The illustrated example is not, however, limiting.

For example, the second drive system could also be a magnetic or mechanical system.

Optionally, the support assembly of the second end, attached to the useful strands of the belts 74, 76, could also have two pairs of guide openings each adapted to the passage of a so-called passive strand 74p, 76p of each secondary belt.

Claims (14)

Glazing (100, 200, 300, 400) comprising at least two transparent sheets (10, 12) connected to their edge by a frame (14), and delimiting between them an interspace (16), an occulting curtain (20), able to be moved in a longitudinal direction (Y) inside the interspace (16), and a system for actuating said curtain, the glazing being characterized in that a first end (20a) of the curtain (20) is integral with a winding axis (22) extending in a lateral direction (X) orthogonal to the longitudinal direction, the curtain ( 20) being wound around the winding axis (22), and the actuating system comprises means for driving the first end in translation in the longitudinal direction (Y), and means for guiding the first end in translation in the longitudinal direction (Y). Glazing (100, 200, 300, 400) according to claim 1, wherein the curtain is a self-winding curtain. The glazing (100, 200, 300, 400) according to claim 2, wherein the curtain (20) comprises a substrate of polyethylene terephthalate (PET) or ethylene polynaphthalate (PEN) coated with a layer of metal or metal oxide, for example indium tin oxide (ITO). Glazing (100, 200, 300, 400) according to any preceding claim, wherein the guide means are configured to guide the first end (20a) symmetrically on either side of the median plane of the curtain ( 20). Glazing (100, 200, 300, 400) according to any one of the preceding claims, wherein the guiding means comprise at least one guide wire which is integral or on which is mounted movable the first end (20a) of the curtain or a support assembly (21) integral with said end. Glazing (100, 200, 400) according to claim 5, wherein the guiding means comprise at least two belts (24, 26) adapted to be moved simultaneously and each having a useful wire forming a guide wire, the first end ( 20a) of the curtain (20) being integral with said useful strands. Glazing (100, 200, 300, 400) according to claim 5 or 6, further comprising a housing (50) housing the winding axis (22) of the curtain (20), the housing (50) being fixed or mounted movable on said at least one cable and having a slot (54) extending laterally and traversed by a curtain thickness (20). Glazing (200, 300) according to any one of the preceding claims, wherein the drive means comprise at least one outer member (60) adapted to be displaced along an outer face of the glazing unit, and at least one member interior (64) integral with the first end of the blackout curtain, the outer member (60) and the inner member (64) being adapted to cooperate by magnetic effect. Glazing (100, 400) according to any one of the preceding claims, wherein the drive means comprise at least one electric motor (40). Glazing (100, 400) according to claim 9, wherein the electric motor is powered by a photovoltaic module (44), the electric motor and the photovoltaic module being both housed in the interspace (16) of the glazing. Glazing (100, 200, 300) according to any one of the preceding claims, wherein the second end of the curtain (20b) opposite the first end (20) is integral with the frame (14) of the glazing. Glazing (400) according to any one of claims 1 to 11, wherein the actuating system comprises drive means of the second end of the curtain (20b) opposite the first end (20a), in translation in the longitudinal direction (Y), and means for guiding the second end of the curtain (20b) in translation in the longitudinal direction (Y). Glazing (400) according to claim 12, wherein the guide means of the second end (20b) comprise at least one secondary guide cable which is fixed or on which is mounted movable the second end (20b) of the blackout curtain or a support assembly (70) secured to said end. Glazing (400) according to claim 12 or 13, wherein the guide means of the second end comprise at least two secondary belts (74, 76) adapted to be moved simultaneously and each having a useful strand forming a secondary guide wire, the second end (20b) of the blackout curtain being integral with said useful strands.

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