DE20104989U1 - Slat for the curtain a slatted blind - Google Patents

Abstract

The sun blind has a slatted construction formed from several laminates . These are produced with a curved profile which includes two distinct sections (4,6). The arrangement provides both stiffness and the necessary reflection of the sun's rays.

Description

Tel.+49-10)421-36 35 0
Note/Owner. HÜPPE FORM SUN PROTECTION. Fax:««1-328&Igr;&ohgr;&idiagr;&iacgr;&ogr;

Aim reference number: New registration mail@eisenfuhr.com

http://www.eisenfuhr.com

Alicante European Trademark Attorney Dipl.-Ing. Jürgen Klinghardt

Hüppe Form Sonnenschutzsysteme GmbH, Cloppenburger Straße 200, 26133 Oldenburg

Slat for the curtain a slatted blind

The invention relates to a slat for the curtain of a slatted blind, with an outer slat section adjacent to the outside space, which merges into an inner slat section adjacent to the interior space, forming a first raised bending edge running in the longitudinal direction of the slat, wherein the outer and the inner slat section have a light-reflecting surface on the upper side.

Such slats are known, for example, from DE 44 42 870 or EP 0 793 761, in which an outer slat section adjacent to the outside space has a stepped cross-sectional profile, whereby this outer slat section merges into an inner slat section facing the interior space, forming a first raised bending edge, which is concavely curved upwards in cross-section. While the stepped outer slat section absorbs the direct solar radiation, which is accompanied by a comparatively

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If the light that falls on the slat at a large angle of incidence is reflected back into the outside space, the diffuse light that falls at a small angle of incidence is reflected by the inner slat section directly into the interior to the ceiling and brightens the interior with daylight. The disadvantage of these known slats is that the outer slat section has a relatively complicated cross-section that can only be produced with comparatively great effort and can also easily be deformed in an undesirable way during use.

The object of the invention is therefore to further develop a slat of the type mentioned at the outset in such a way that the slat has a simplified structure with high stability.

This object is achieved according to the invention in the lamella of the type mentioned at the outset in that the outer lamella section - seen in cross-section - extends obliquely outwards and downwards from the first raised bending edge.

The advantages of the invention are in particular that instead of a stepped, relatively unstable outer slat section, an outer slat section with a soft cross-sectional contour is provided, which effectively reflects the direct solar radiation incident at a higher angle of incidence back into the outside space, whereas - in a particularly preferred embodiment of the invention - the inner slat section is provided with a slight, upwardly concave curvature, so that the solar radiation diffusely incident at a low angle of incidence is effectively reflected into the interior towards the ceiling. The slat cross-section according to the invention therefore realizes the desired light guidance with a stable cross-section, which realizes an improved appearance due to the soft, partially smooth cross-sectional contour.

According to a particularly preferred embodiment of the invention, the outer lamella section increases with increasing distance from the first raised

Bending edge has an increasing distance a from a tangential plane that runs through the first raised bending edge. The outer lamella section is particularly preferably curved in such a way that it has a concave shape in cross-section upwards. The cross-sectional shape of the outer lamella section is preferably designed in such a way that - with the inner lamella section lying approximately horizontally - the outer lamella section rises with a horizontal tangent or with a comparatively small tangential gradient towards the first bending edge. The width of the outer lamella section is smaller than that of the inner lamella section, preferably the width bi of the inner lamella section is several times larger than the width ba of the outer lamella section.

According to a preferred embodiment of the invention, the tangential planes of the outer and inner slat sections that pass through the raised first bending edge enclose an angle β of 90° to 150°. It has been shown that this dimensioning of the first raised bending edge enables optimal light guidance to be achieved.

According to an alternative, also preferred embodiment of the invention, the outer slat section has two or more sections with a concave upward cross-section, each of which merges into one another to form a raised bending edge. The inner slat section can also be formed with several sections with a concave upward cross-section, with raised bending edges also forming between these concavely curved sections. With such a design of the slats, a more compact cross-section can be achieved with only slightly reduced light deflection properties.

According to a particularly preferred embodiment of the invention, at least the underside of the inner slat section is also provided with a light-reflecting surface, whereby a larger proportion of incident sunlight in

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the interior can be directed as daylight because then, for example, light incident at a higher angle of incidence is also available as daylight in the interior through a second reflection on the underside of the next higher slat. In this embodiment of the invention, the cross-section of the inner slat section is particularly preferably S-shaped, i.e. the first concave zone adjoining the first bending edge is followed by a zone that is convexly curved upwards without a bending edge. The advantage of the S-shaped curved cross-section of the inner slat section is that the underside of the slat above is illuminated more evenly by reflected light, so that light/dark/streak formation on the underside of the slats is largely avoided.

Advantageous developments of the invention are characterized by the features of the subclaims.

In the following, embodiments of the invention are explained in more detail with reference to the drawings. They show:

Figure 1

a first embodiment of a lamella in cross section;

Figure 2

a second embodiment of a lamella in cross section;

Figure 3

a third embodiment of a lamella in cross section;

Figure 4

a fourth embodiment of a lamella in cross section;

Figure 5

a fifth embodiment of a lamella in cross section;

Figure 6 a slat suspended from the turning elements of a curtain with

a cross-section according to Figure 1;

Figure 7 shows the beam path of the incident light in two superimposed

arranged slats according to Figure 1; and

Figure 8 shows the beam path of the incident light in two curtains

slats arranged one above the other as shown in Figure 5.

Figures 1 to 5 show five different embodiments of a slat, each seen in cross-section. Common to all embodiments is an outer slat section 4 which is comparatively narrow in cross-section and directed towards the outside and a comparatively wide inner slat section 6 directed towards the inside. At the transition point of the two slat sections 4, 6 there is a first raised bending edge 8 which runs in the longitudinal direction of the slats, i.e. parallel to the outer longitudinal edge 14 and the inner longitudinal edge 16. The two tangential planes 10 and 12 of the outer and inner slat sections 4, 6 which run through the first raised bending edge 8 enclose an angle α at the raised bending edge which is preferably in the range between 90° and 150°.

The width bi of the inner lamella section 6 is several times greater than the width ba of the outer lamella section 4. In the essentially horizontal orientation of the inner lamella section 6 - shown in all cross sections according to Figures 1 to 5 - the outer lamella section 4 - seen in cross section - rises with a slight tangential gradient, preferably between 0<ß< 20° towards the first raised bending edge 8.

In the cross-section of the lamella 2 shown in Figure 1, the outer lamella section 4 is curved concavely upwards, so the distance a from the tangential plane 10 to the outer longitudinal edge 14 increases continuously. The inner lamella section 6 is also curved concavely upwards, although the curvature of the outer lamella section 4 is greater than that of the inner lamella section 6.

In the embodiment of the lamella shown in Figure 2, the outer lamella section 4 contains a plurality of sections 4a, 4b which are concavely curved upwards in cross-section and which merge into one another to form a second raised bending edge 9 running in the longitudinal direction of the lamella.

In the cross-section of the lamella shown in Figure 3, the outer lamella section 4 is provided with only one concavely curved zone, whereas the inner lamella section 6 has two adjoining concave, upwardly curved sections 6a, 6b which merge into one another to form a third raised bending edge 11, the third bending edge 11 running parallel to the first or second bending edge 8, 9 and the longitudinal edges 14, 16.

The cross sections of the slats according to Figures 4 and 5 are characterized in that the inner slat section 6 has a first, upwardly concave section adjacent to the raised bending edge 8, into which - without a bending edge - a convexly upwardly curved section 6b adjoins the interior, so that the cross section of the inner slat section 6 is essentially S-shaped. In contrast, the outer slat section 4 - in Figure 4 - is only curved concavely upwards once, whereas in Figure 5 the outer slat section is curved concavely upwards twice - forming a raised bending edge 9, see sections 4a, 4b.

Figure 6 shows a slat whose cross-section corresponds to that in Figure 1, suspended between two turning elements 20, 22 of a curtain. The outer longitudinal edge 14 is attached to the outer turning cord 20 with a relatively long retaining strap 24. The inner longitudinal edge 16 is attached to the inner turning cord 22 with a shorter retaining strap 26. A slat position is shown in which the curtain is closed. To open the curtain, for example, the outer turning cord 20 is moved upwards or the inner turning cord 22 is moved downwards.

Figures 7 and 8 show two slats suspended one above the other in a curtain, with the cross-section according to Figure 1 (Figure 7) and with the cross-section according to Figure 4 (Figure 8), respectively. The path of the rays of the solar radiation acting on the slats from the outside is shown.

As can be seen from Figure 7, the solar radiation that hits the inner slat section 6 at a higher angle of incidence is reflected back by the outer slat section 4, and the radiation that hits the inner slat section 6 is reflected into the room on the underside of the next upper slat - in the area of the first raised bending edge 8, if the underside of the inner slat sections 6 is also designed to reflect light. In contrast, the area of the inner slat section 6 that faces the inner longitudinal edge 16 is dark because it is not reached by incident light. Light and dark longitudinal stripes therefore form on the back of the slats, which have an uneven and therefore disturbing effect, for example when working at a computer screen.

In contrast, the slats shown in Figure 8 are curved in an S-shape in the inner slat section. As a result, the solar radiation that hits at a steeper angle of incidence is reflected into the interior near the first raised bending edge 8 of the slat above. The diffuse sunlight hits the reflective surface of the lower slat in the rear area of the inner slat section 6 and is then reflected in the rear area onto the underside of the slat above and then also emitted into the interior. As a result, the underside of the slats is essentially evenly bright due to the reflected light, resulting in a more even and therefore more pleasant light distribution.

Claims (18)

1. Slat for the curtain, a slatted blind, with an outer slat section adjacent to the outside space, which merges into an inner slat section adjacent to the interior space, forming a first raised bending edge running in the longitudinal direction of the slat, the outer and the inner slat section having a light-reflecting surface in sections on the upper side, characterized in that the outer slat section ( 4 ) - seen in cross section - extends obliquely outwards and downwards from the first raised bending edge ( 8 ). 2. Slat according to claim 1, characterized in that the outer slat section ( 4 ) has an increasing distance (a) from the tangential plane ( 10 ) passing through the first raised bending edge ( 8 ) with increasing distance from the first raised bending edge ( 8 ). 3. Slat according to claim 1 or 2, characterized in that the outer slat section ( 4 ) is concavely curved upwards in cross section. 4. Slat according to claim 3, characterized in that the cross section of the slat section ( 4 ) at its outer longitudinal edge ( 14 ) - with a substantially horizontal alignment of the inner slat cross section ( 6 ) - rises with a slight, tangential gradient 0 ≤ β ≤ 20° towards the first raised bending edge. 5. Slat according to one of the preceding claims, characterized in that the inner slat section ( 6 ) is concavely curved upwards in cross section. 6. Slat according to one of the preceding claims, characterized in that the width (ba) of the outer slat section ( 4 ) is smaller than the width (bi) of the inner slat section ( 6 ). 7. Slat according to claim 5, characterized in that the width (bi) of the inner slat section ( 6 ) is several times greater than the width (ba) of the outer slat section ( 4 ). 8. Slat according to one of the preceding claims, characterized in that the curvature of the outer slat section ( 4 ) is greater than the curvature of the inner slat section ( 6 ). 9. Slat according to one of the preceding claims, characterized in that the tangential planes ( 10 , 12 ) of the outer and inner slat sections ( 4 , 6 ) passing through the first raised bending edge ( 8 ) enclose angles α of 90 < α < 150°. 10. Slat according to one of the preceding claims, characterized in that the outer slat section ( 4 ) has several sections ( 4a , 4b ) which are curved upwards in a concave cross-section. 11. Slat according to claim 9, characterized in that the concavely curved sections ( 4 a, 4 b) of the outer slat section ( 4 ) merge into one another to form a second raised bending edge ( 9 ) running in the longitudinal direction of the slat. 12. Slat according to one of the preceding claims, characterized in that the inner slat section ( 6 ) has a plurality of sections ( 6a , 6b ) which are concavely curved upwards in cross section. 13. Slat according to claim 11, characterized in that the concavely curved sections ( 6 a, 6 b) of the inner slat section merge into one another to form a third raised bending edge ( 11 ) running in the longitudinal direction of the slat. 14. Slat according to one of the preceding claims, characterized in that the concave partial section ( 6 a) of the inner slat section ( 6 ) adjacent to the first raised longitudinal edge ( 8 ) merges into an upwardly convexly curved partial section ( 6 b) towards the inner longitudinal edge ( 16 ). 15. Slat according to claim 14, characterized in that the curvature of the concave portion ( 6 a) and the convex portion ( 6 b) of the inner slat portion ( 6 ) are approximately equal. 16. Slat according to one of the preceding claims, characterized in that at least one strip-shaped section of the slat running in the longitudinal direction has a predetermined uniform perforation. 17. Slat according to one of the preceding claims, characterized in that the inner slat section ( 6 ) and optionally also the outer slat section ( 4 ) have a light-reflecting surface on the underside. 18. Curtain for a venetian blind, with several horizontally running, spaced-apart slats 1 to 16 .