Shading device

Abstract

A shading device, in particular a Venetian blind or a roller blind, for shading and / or closing a building opening, comprising at least a plurality of slats (1), wherein the slats (1) are each movably mounted in at least one lateral guide rail by means of guide pins (4) and are movable up and down, intermediate openings are present between adjacent slats (1) when the slats (1) are at least partially lowered, and the slats (1) each have at least one separate live conductor (5.0, 5.1), wherein the conductors (5.0, 5.1) can be alternately supplied with a first voltage potential and a second voltage potential, such that when a voltage is applied, an electric field is formed between adjacent slats (1) which prevents insects from moving through the intermediate openings. The invention is characterized in that at least the conductors (5.1) whose voltage potential differs from ground, and which have insulation. A building control / automation system for controlling and linking various building facilities, as well as a building, at least comprising at least one shading device and at least one building control / automation system.

Description

[0001] The invention relates to a shading device for shading and / or closing a building opening, comprising at least a plurality of louvers, wherein the louvers are each movably mounted in at least one lateral guide rail by means of guide pins and are movable up and down, intermediate openings are present between adjacent louvers in an at least partially lowered state of the louvers, and the louvers each have at least one separate voltage-carrying conductor, wherein the conductors can be alternately supplied with a first voltage potential and a second voltage potential, so that when voltage is applied an electric field is formed between adjacent louvers which prevents insects from moving through the intermediate openings.

[0002] Annoying insects, especially mosquitoes, are a constant nuisance, particularly during the warmer months, and can significantly impair quality of life, for example, by disrupting sleep or causing itchy and painful bites. Climate change and globalization are contributing to their increased spread, even in European latitudes. Insects are also playing an increasingly important role as vectors of disease for humans and animals. Diseases such as malaria, yellow fever, dengue fever, chikungunya, West Nile fever, and certain parasitic worms can be transmitted by mosquitoes. With the arrival of invasive vector mosquitoes like the Asian tiger mosquito, this aspect is gaining considerable importance in Europe as well.

[0003] Conventional methods for controlling mosquitoes, flies, and other pests primarily involve preventing insects from entering a building. This means that windows and doors must either remain closed or be fitted with fine-mesh insect screens. Insect screens are available that are permanently mounted to the window or door and are relatively transparent or, in more robust versions, even scratch-resistant. A disadvantage of insect screens is that they must be installed as an additional physical barrier on doors and windows. These barriers are susceptible to accidental contact or damage by pets. Furthermore, they detract from the overall appearance of a building, both inside and out. The soiling of the insect screen mesh by house dust and environmental factors is another drawback. In addition, these screens restrict ventilation and visibility.

[0004] Alternative methods for repelling or eliminating insects include the use of pesticides or bait and trap systems. However, these often have the problem that not only annoying mosquitoes are killed, but also beneficial insects such as butterflies or bees. Additionally, while the chemical substances used may repel insects, they can be hazardous to the health of children, pets, and sensitive individuals.

[0005] Another method involves electronic deterrents. These generate sound waves with frequencies that can repel insects. However, this method is generally not very effective.

[0006] Several publications are known on the topic of insect protection / repellency, for example: Publication US 2010 / 0053935 A1 describes a type of mosquito repellent lamp that acts as sterilization, mosquito repellent, deodorizing and air purification, and also serves as lighting.

[0007] Publication US 2019 / 0261636 A1 refers to a mosquito repellent plaster, and in particular one that can be easily stuck to the human body, personal items, or any other object to keep mosquitoes away from it.

[0008] The US design US D754,278 S shows a decorative design for a mosquito repellent clip.

[0009] The publication JP 2001136890 A refers to an electric mosquito catcher that can be used outdoors in a small size using a dry cell battery as a power source.

[0010] However, all known methods for insect protection / repellency are either cumbersome, ineffective, or associated with unpleasant side effects.

[0011] The publication EP 3697207 B1 describes a method for repelling mosquitoes, or rather, how to prevent mosquitoes from entering houses through open windows or similar openings. It describes a system for generating an electric field between the slats of a Venetian blind or roller shutter using high voltage, which deters mosquitoes from entering the building. This is known as mosquito repellent. The electric field does not kill the mosquitoes, nor other insects such as moths or bees.

[0012] In this system, the slats of the venetian blind are alternately connected to different voltage potentials, creating a potential difference between adjacent slats that generates an electric field. The slats themselves serve as electrodes, or voltage-carrying conductors. With a slat spacing of 10 mm to 30 mm, high voltages of ideally 3.5 kV are applied to create an electric field that deters mosquitoes and other insects from flying through, but does not kill them.

[0013] However, a disadvantage of conducting voltage through the lamellae is that, firstly, short circuits and malfunctions can occur in rain or high humidity. Secondly, touching the lamellae can cause an unpleasant electric shock.

[0014] Reference is also made to the general state of the art in the publications DE 20 2019 000 228 U1, DE 10 2016 117 770 A1, DE 10 2021 210 642 A1 and DE 20 2021 004 027 U1.

[0015] The purpose of the invention is to create an improved system for insect protection / repellency, which eliminates the disadvantages mentioned at the outset in the prior art.

[0016] This problem is solved by the features of the independent patent claim. Advantageous embodiments of the invention are the subject of dependent claims.

[0017] The inventors have recognized that the system known from publication EP 3697207 B1, which generates an electric field on the slats of a venetian blind to deter insects, can be improved, and in particular made safer.

[0018] Accordingly, the inventors propose to improve a shading device, in particular a venetian blind or a Venetian blind, for shading and / or closing a building opening, comprising at least a plurality of slats, wherein the slats are each movably mounted in at least one lateral guide rail by means of guide pins and are movable up and down, intermediate openings are present between adjacent slats when the slats are at least partially lowered, and the slats each have at least one separate live conductor, wherein the conductors can be alternately supplied with a first voltage potential and a second voltage potential, so that when voltage is applied an electric field is formed between adjacent slats which prevents insects from moving through the intermediate openings, in such a way that at least the conductors,whose voltage potential differs from ground, have insulation and are designed as high-voltage cables, wherein the high-voltage cable is either guided on both the underside and the top side of the lamella, or is at least partially guided on the outside along the longitudinal edges of the lamella.

[0019] The shading device is preferably a Venetian blind or a roller blind in the known designs with a multitude of slats, each movably mounted in lateral guide rails by means of guide pins. The slats can be tilted around their longitudinal axis as needed and raised and lowered, either manually or electrically. When the slats are at least partially lowered, there are gaps between adjacent slats through which insects can fly in conventional Venetian blinds or roller blinds. The slats can be made of different materials, primarily metallic materials such as aluminum, as well as non-metallic materials such as plastic or wood.

[0020] To generate an electric field, preferably all lamellae have a conductor across which a voltage potential is applied. The voltage potential alternates, meaning the conductors are alternately subjected to a first voltage potential and a second voltage potential. For the sake of simplicity, we will refer to these as alternating lamellae, or even and odd lamellae. If we were to count the lamellae from top to bottom, those with an even number would be at a first voltage potential, and those with an odd number would be at a second voltage potential. The second voltage potential is either the inverse of the first voltage potential in magnitude or zero.

[0021] During operation, i.e., when voltage is applied, an electric field forms between adjacent lamellae in the gaps between them, preventing insects from moving through these gaps. The voltage, or rather the strength of the electric field, is selected so that the insects are merely deterred by the electric field and do not fly through, but are not killed. Too low a voltage creates an electric field that is too weak and does not deter insects. Too high a voltage creates an electric field that is too strong and kills the insects, which is what the invention is designed to avoid.

[0022] The optimal voltage depends on the distance between adjacent slats and their width. The greater the distance and the wider the slats, the higher the applied voltage must be to generate a sufficiently strong electric field that prevents mosquitoes from flying between the slats and into the building. A voltage of at least 1 kV is preferred, which is already in the high-voltage range. For conventionally designed external venetian blinds or Venetian blinds with a slat width of 60 mm to 95 mm and a slat spacing of 55 mm to 85 mm, a voltage between 10 kV and 15 kV appears to be particularly advantageous and to achieve especially good results in insect control.

[0023] Accordingly, a voltage source is designed that can apply different voltage potentials to the conductors. For example, the voltage source can generate a constant, pulsed, or cyclically increasing / decreasing voltage, so that the electric field is also constant, pulsed, or cyclically increasing / decreasing.

[0024] According to the invention, at least the conductors whose voltage potential differs from ground, i.e., is not zero, are equipped with insulation. This precaution is not necessary for the conductors whose voltage potential is zero, or for the grounded conductors. In one embodiment, therefore, only the conductors of every second lamella are insulated. In another embodiment, all conductors are insulated.

[0025] The insulation of the conductors according to the invention primarily protects against voltage / current breakdowns, especially in the event of unintentional contact between the conductors or laminations. The insulation is advantageously also waterproof, thus providing protection against breakdowns and corrosion even in damp or rainy conditions. However, when selecting the insulating material, care should be taken to ensure that it attenuates the electric field as little as possible or is as permeable to the electric field as possible.

[0026] Conventional louvers often have an additional layer of paint for an attractive appearance. However, it should be noted that while this paint layer does have a certain insulating and attenuating effect on the electric field, it is not to be understood as insulation in the sense of the invention.

[0027] The insulation according to the invention advantageously eliminates the need for other safety measures such as additional resistance.

[0028] One embodiment provides that the even and odd lamellae each have a common conductor at a specific voltage potential. Another embodiment provides that each even and odd lamella has its own conductor. Combinations of these are possible. The aforementioned embodiments are not to be understood as limiting.

[0029] To create the electric field between adjacent laminations, the conductors of neighboring laminations are each at different voltage potentials, thus generating a voltage potential difference. Advantageously, the conductor of every second lamination is subjected to a first voltage potential that is not zero, and the conductor of the other laminations is subjected to either a second voltage potential that is the inverse of the first or to a voltage potential of zero. Insulation is advantageously only necessary for the conductors that are not grounded or whose voltage potential is not zero. If the voltage potential is zero, i.e., the conductor is grounded, no insulation is necessary.

[0030] According to the invention, the insulated conductor is designed as a high-voltage cable with insulation. In other words, the insulation of the conductor(s) including the insulation is designed as a high-voltage cable. The high-voltage cable, hereinafter referred to simply as the cable, has insulation in the form of a sheath made of plastic, in particular ethylene propylene polymer (EPR), silicone, or silicone rubber. The cross-section of the conductor is preferably round for better and easier cable routing. However, other cross-sectional shapes are also possible. The diameter of the cable is advantageously 5 mm to 7 mm or is preferably smaller. With regard to cable routing, the thinner the better.

[0031] It has proven particularly advantageous to use a common conductor for all even or odd laminations. For example, the insulated conductor or cable can be run from even lamination to even lamination, skipping the odd laminations, or vice versa. This advantageously supplies all even or odd laminations with a uniform voltage potential via a common conductor or cable.

[0032] For example, an insulated cable runs through all the even-numbered lamellae and is charged with a voltage potential of, say, +10 kV. The odd-numbered lamellae can then either be grounded, or another insulated cable can run through them, which is charged with a second voltage potential, in this example -10 kV.

[0033] Several options are possible for routing the cable along the fins. The choice of cable routing depends primarily on the fin material, specifically whether it is metallic or non-metallic. If the fins are made of a metallic material, the problem arises that the conductors are shielded from the conductors of the adjacent fins, preventing the formation of an electric field. This can be prevented or circumvented by appropriate cable routing. Ideally, each conductor or cable should have a clear line of sight to the conductor or cable of the adjacent fin. This is particularly important for metallic fins and is at least advantageous for non-metallic fins.

[0034] According to the invention, the high-voltage cable is either guided on both the underside and the top side of the lamella or at least partially along the outside of the longitudinal edges of the lamella.

[0035] In a simple embodiment, the high-voltage cable is guided along the longitudinal axis of the lamella, preferably in only one direction, so that the beginning and end of the cable are at opposite ends of the lamella. For the sake of simplicity, the cable preferably runs essentially straight, i.e., parallel to the longitudinal axis of the lamella. Of course, the cable can also be guided in curves. However, this has no effect on the formation of the electric field or the required voltage, but it does require more material.

[0036] In another embodiment, the high-voltage cable is guided at least partially along the longitudinal direction of the lamella in at least one loop. The cable is advantageously guided in one or two loops. When the cable is in a loop, it runs along the first longitudinal direction of the lamella, then in a loop to turn around, and runs back along the opposite longitudinal direction of the lamella. The beginning and end of the cable are at one end of the lamella. The cable essentially describes a U-shape. It is advantageous to guide the cable along as much of the lamella as possible. With two loops, the cable is preferably turned around again in a loop after being guided back along the lamella, and the end of the cable is then located at the opposite end of the lamella. The cable essentially describes an S-shape. Other cable routing configurations are also conceivable.

[0037] As briefly mentioned earlier, it is particularly disadvantageous with metallic fins if the cable's view of the adjacent fin is obstructed by the fin, thus preventing the electric field from propagating or being shielded. To avoid this problem, the simplest solution is to use a non-metallic fin and / or to adjust the cable routing, i.e., the cable's position on the fin.

[0038] One embodiment of this design provides for the high-voltage cable to be routed on both the underside and the top side of the lamella. For example, the cable can be laid on the top side of the lamella in the first direction, then loop back to the underside, and finally return in the opposite direction. The cable can be routed, for instance, around the outside of the short end of the lamella or through a hole near the end of the lamella. When the cable runs on the underside, it has a clear view of the underlying lamella, possibly including a cable on the top side of that lamella. The same applies analogously to the cable on the top side of the lamella.

[0039] An alternative embodiment provides that the high-voltage cable is routed at least partially along the outer edges of the lamella. Here, too, the cable is routed in such a way that it always has a clear line of sight to the adjacent lamella at the longitudinal edge. The electric field is not shielded by the lamella material at the longitudinal edge.

[0040] Even a tilting of the lamellae around their longitudinal axis does not advantageously affect the formation of the electric field in such a, so to speak, free cable routing.

[0041] If the cable is routed along the surface of the lamella, it is advantageously attached to the lamella. For example, the high-voltage cable can be clipped or glued to the lamella. Clipping is advantageous because the position of the cable can be varied as needed using different clips.

[0042] As an alternative to routing the cable along the surface of the fins, another embodiment provides for the high-voltage cable to run within a crimp on the fin's longitudinal edge. Depending on the fin's material, the crimp shields the cable and prevents the electric field, making this simple routing method particularly suitable for non-metallic fins. If the fin is made of a metallic material, shielding can advantageously be avoided by forming recesses in the fin's material within the crimp. Advantageously, at least 50% of the crimp material is recessed, ensuring the cable is securely held within the crimp, but the shielding provided by the remaining material has no significant effect on the electric field. Furthermore, this cable routing method is advantageous because it eliminates the need for separate fasteners and does not affect the fin's appearance.

[0043] The cables are best routed so that every other slat is omitted. There are also various options for routing and positioning the cables between every other slat. However, it is generally advantageous that the cable length between every other slat is at least twice the maximum distance between the slats to avoid obstructing their up and down movement.

[0044] It is particularly advantageous and desirable to run cables within the guide rails for a visually appealing appearance of the shading device. Therefore, one embodiment provides for the high-voltage cable to be routed between every second slat in the lateral guide rail.

[0045] However, it is also possible, in principle, to route cables outside the guide rails.

[0046] If the cable is guided in the guide rail, it is advantageous for high-voltage cables to be routed through the guide pin into the guide rail. To prevent the cable from obstructing the up and down movement of the slats, the high-voltage cable is preferably twisted at least once in a spiral between every second slat. This cable routing resembles a spiral telephone handset cord. Furthermore, it has proven advantageous if the guide pins through which the cables are routed can rotate around their longitudinal axis, or the longitudinal axis of the slat, as the cable moves up and down. That is, the guide pin is advantageously mounted for rotation.

[0047] In a second embodiment of the invention, the insulated conductor is formed as a middle, conductive layer within a sandwich-like structure of lamellae with outer, non-conductive layers. In this embodiment, the lamellae are structured as a sandwich. The two outer layers are preferably made of a non-conductive, ideally even insulating, material, and the middle, inner layer constitutes the actual conductor.

[0048] In one embodiment, the conductive layer is a vapor-deposited surface of at least one outer layer. Materials such as copper or aluminum are suitable for vapor deposition. In this variant, the external appearance of the fins is advantageously not altered.

[0049] It is also advantageous that an electrical connection exists between the conductive layers of each pair of slats, guided by the guide pins and along the guide rail. This electrical connection can be established, for example, by means of a copper or brass rod, which is inserted through the guide pin from the conductive inner layer and makes contact with a busbar in the guide rail. Advantageously, the contact between the guide pin and the busbar is maintained when the slats are moved up and down. Another advantage of this design is that the shading device is not visually affected by additional cables.

[0050] Another variant of the invention may involve forming a type of longitudinal grid within a frame, wherein the conductors advantageously run in only one direction and are spaced parallel to each other. The conductors can be alternately subjected to different voltage potentials. Such a construction can, for example, be used as an attachment for a window or door.

[0051] A further advantageous embodiment of the shading device according to the invention provides an interface to a building control / automation system. Using the building control or building automation system (smart home control), various devices and systems in a building can be controlled and interconnected, for example, external venetian blinds, shutters, roller blinds, lighting, etc. For example, the shading device can be automatically switched to an operating state at dusk, so that the electric field for mosquito repellency is automatically activated. Furthermore, by way of example, the shading device can be controlled and programmed in such a way that it operates depending on the lighting in the building. These are merely examples of possible applications and control options.

[0052] Furthermore, a building control / automation system for controlling and linking various building facilities, at least comprising at least one interface to a shading device according to the invention as described above, is described.

[0053] Furthermore, a building is also described, comprising at least one shading device according to the invention as described above, as well as at least one building control / automation system according to the invention as described above.

[0054] A particular advantage of the system according to the invention for insect deterrence in shading devices is that, unlike the system already known from publication EP 3697207 B1, it can be easily retrofitted to existing shading devices.

[0055] The invention is described in more detail below with reference to the preferred embodiments and the figures, whereby only the features necessary for understanding the invention are shown.

[0056] They show in detail: FIG 1: A schematic bottom view of a lamella with an insulated conductor designed as a high-voltage cable, FIG 2: A schematic longitudinal side view of the lamella according to the Figure 1 , FIG 3: a first schematic cross-section through a lamella, FIG 4: a second schematic cross-section through a lamella, FIG 5: a schematic representation of a plurality of lamellae with alternating conductors subjected to a voltage potential in a first embodiment, and FIG 6: a schematic representation of the plurality of lamellae with alternating conductors subjected to a voltage potential in a second embodiment.

[0057] The Figure 1Figure 1 shows a schematic underside view of a lamella 1 with an insulated conductor designed as a high-voltage cable 2. The conductor is supplied with a non-zero voltage potential from a voltage source (not shown) and therefore, according to the invention, has insulation. In the exemplary embodiment shown here, the insulated conductor is designed as a high-voltage cable 2, or simply cable 2. The cable 2 is guided through the guide pin 4 at one end of the lamella 1 and then runs almost the entire length of the lamella 1 until it is looped back in the opposite direction at the other end. The cable 2 is then guided through the guide pin 4 again. The cable 2 is held by several clip-like cable holders 3, which can be clipped onto the underside of the lamella 1 or into the crimp of the longitudinal edges of the lamella 1.The position of the cable holders 3 with respect to the longitudinal alignment of the lamella 1 can be varied as desired.

[0058] The Figure 2 shows a schematic longitudinal side view of lamella 1 according to the Figure 1 In this embodiment, the cable holders 3 are arranged at a uniform angle. The lamella 1 has a semicircular cross-section. As a result, both the cable 2 arranged on the underside and the cable holders 3 are almost invisible from the side.

[0059] The Figures 3 and 4 The figures show different cross-sections through a lamella 1 with different cable routing. The cable routing according to the Figure 3 corresponds to the cable routing according to the Figure 1 It can also be seen that the cable holder 3 is clamped or clipped under the crimp of the lamella 1.

[0060] According to the Figure 4The cable 2 is guided in two loops along the lamella 1. The cable holder 3 is designed accordingly to hold the cable 2 at three points.

[0061] This cable routing on the underside of the lamella 1 is particularly suitable for non-metallic lamellae 1, as otherwise the conductor would be shielded by the lamella 1 and the formation of the electric field would be prevented.

[0062] The cable routing and cable attachment to the lamella shown here are merely examples and should not be interpreted as restrictive in any way.

[0063] The Figures 5 and 6Figure 1 shows a schematic representation of a multitude of lamellae 1 with alternating conductors carrying a voltage potential. For better understanding and easier explanation, the lamellae 1 are numbered from top to bottom. All lamellae 1 have a conductor 5.0 or 5.1 carrying a voltage, with the voltage value alternating from lamella 1 to lamella 1, so that a voltage potential difference exists between adjacent conductors 1. This generates an electric field between adjacent lamellae 1, which covers the openings between them and prevents insects from flying through.

[0064] A voltage source 10 is provided to generate the different voltages or the voltage difference. The voltage can be applied, for example, constantly, pulsedly, or cyclically increasing / decreasing, so that the electric field is also generated in a constant, pulsed, or continuously increasing / decreasing manner.

[0065] In the embodiment of the Figure 5 The odd-numbered lamellae 1a have a common conductor 5.1, which is supplied with a positive voltage, for example 10 kV, by means of the voltage source 10. According to the invention, the conductor 5.1 has insulation, since it is supplied with a non-zero voltage. Here, the conductor 5.1 is designed as an insulated high-voltage cable.

[0066] The routing of the conductor 5.1 along the lamellae 1a corresponds to that shown in the Figure 1The cable routing shown is as follows. The conductor 5.1 skips over the even lamellae 1b. The conductor 5.1 is guided by the guide pins into the lateral guide rail, where it is guided between the odd lamellae 1a (not shown here).

[0067] The lamellae 1a are made of a non-metallic material to prevent the lamellae 1a from shielding the electric field.

[0068] For the sake of simplicity, the straight lamellae 1b are made of a metallic material and connected via the guide pins (not shown here) to a conductor 5.0, which is grounded, i.e., has a voltage potential of zero. Insulation is not necessary here according to the invention.

[0069] Thus, the odd-numbered lamellae 1a with conductors 5.1 carrying a positive voltage and the even-numbered lamellae 1b with grounded conductors 5.0 are arranged alternately. A potential difference exists between conductors 5.1 and 5.0, which generates the electric field.

[0070] The embodiment of the Figure 6 The cable routing of conductor 5.1 differs in the odd-numbered lamellae 1a. Conductor 5.1 is guided in two loops along the longitudinal extent of the lamellae 1a, so that the beginning and end of conductor 5.1 are guided into the guide rail by the guide pins at opposite ends of the lamellae 1a (not shown here). Between the lamellae 1a, conductor 5.1 thus runs alternately in the left and right guide rail (not shown here). Reference symbol list

[0071] 1 lamella 1a odd lamella 1b even lamella 2 insulated high-voltage cable (cable) 3 cable holder 4 guide bolt 5.0 grounded conductor 5.1 conductor carrying a positive voltage 10 Voltage source

Claims

1. Shading device, in particular a Venetian blind or a slatted blind, for shading and / or closing a building opening, at least having a plurality of slats (1), wherein the slats (1) can be moved up and down, there are intermediate openings between adjacent slats (1) in an at least partially lowered state of the slats (1), and the slats (1) each have at least one separate voltage potential-carrying conductor (5.0, 5.1), wherein a first voltage potential and a second voltage potential can be alternately applied to the conductors (5.0, 5.1), so that, when voltage is applied, an electric field is formed between adjacent slats (1), the electric field preventing insects from moving through the intermediate openings, wherein at least the conductors (5.1), the voltage potential of which differs from earth, have an insulation, characterized in that the slats (1) are each movably mounted in at least one lateral guide rail by means of guide bolts (4), and in that at least the conductors (5.1) are in the form of high-voltage cables (2), wherein the high-voltage cable (2) is guided either both on the bottom side and on the top side of the slat (1) or is guided at least partially along the outside of the longitudinal edges of the slat (1).

2. Shading device according to the preceding Claim 1, characterized in that a first voltage potential different from zero is applied to the conductor (5.1) of each second slat (1) and either a second voltage potential which is inverse to the first voltage potential or a voltage potential equal to zero is applied to the conductor (5.0) of the other slats (1).

3. Shading device according to either of the preceding Claims 1 and 2, characterized in that the high-voltage cable (2) is guided along the longitudinal orientation of the slat (1).

4. Shading device according to any of the preceding Claims 1 to 3, characterized in that the high-voltage cable (2) is guided at least partially over the longitudinal orientation of the slat (1) in at least one loop.

5. Shading device according to any of the preceding Claims 1 to 4, characterized in that the high-voltage cable (2) is clipped or adhesively bonded to the slat (1).

6. Shading device according to any of the preceding Claims 1 to 5, characterized in that the high-voltage cable (2) runs in a beading of the longitudinal edge of the slat (1).

7. Shading device according to the preceding Claim 6, characterized in that cutouts in the material of the slat (1) are formed in the beading.

8. Shading device according to any of the preceding Claims 1 to 7, characterized in that the high-voltage cable (2) is guided between each second slat (1) in the lateral guide rail.

9. Shading device according to the preceding Claim 8, characterized in that the high-voltage cable (2) is guided into the guide rail by the guide bolt (4).

10. Shading device according to any of the preceding Claims 1 to 9, characterized in that the high-voltage cable (2) is twisted in a spiral shape at least once between each second slat (1).

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