EP4344455A1

EP4344455A1 - Flat flexible web-shaped textile structure and kit-of-parts

Info

Publication number: EP4344455A1
Application number: EP21759087.6A
Authority: EP
Inventors: Christian Walter; Anja SCHRÖPFER; Victor FRANKE
Original assignee: DAW SE
Current assignee: Flexfy GmbH
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2024-04-03
Also published as: WO2023016660A1

Abstract

The invention relates to a flat flexible web-shaped textile structure, in particular a web-shaped textile structure which can be rolled up, consisting of or comprising a flexible carrier layer with a longitudinal extension, a plurality of flat longitudinal electric conductor paths with respect to the carrier layer with the longitudinal extension, wherein the plurality of flat electric conductor paths are provided on the front face and/or on the rear face of the carrier layer or are integrated into the carrier layer, and a flexible magnetizable holding layer. The carrier layer forms the holding layer, or the holding layer is formed separately from the carrier layer. In particular, the holding layer and the carrier layer form a layer composite, said holding layer being provided on the front face or on the rear face of the carrier layer in particular.

Description

Flexible sheet-like fabric and kit-of-parts

Description

The invention relates to a flexible web-like structure, in particular one that can be rolled up, which can preferably be provided for the surface power supply in the low-voltage range. The invention also relates to a kit of parts with one or more flexible sheet-like structures.

US 2009/0219712 A1 describes a lighting system with an electrically conductive wallpaper. The wallpaper can be applied to a building wall or ceiling. A large number of electrically conductive strips are provided on the wallpaper. Electrical light sources can be connected to the conductive strips by contact pins. The strips and contact pins are provided at a certain distance from one another, so that strips of different potential can be brought into contact with different contact pins. The use of the lighting system is subject to errors. When applying a dampening solution, the electrical connection required for the operation of the illuminant is often not closed. In the worst case, short circuits can occur.

The object of the present invention was to overcome the disadvantages of the prior art, in particular to provide a fabric and/or a kit-of-parts that can also be produced easily and inexpensively on an industrial scale, that can be easily adapted to a wide variety of circumstances and /or with which electrical contact can be achieved safely and easily.

Accordingly, a flexible sheet-like structure is provided. The sheet-like structure according to the invention preferably has a longitudinal direction extending in the web direction and a transverse direction extending transversely, in particular orthogonally, to the web direction. The sheet-like structure is flexible in particular in such a way that it can be rolled up, in particular around a roll axis in the longitudinal direction and/or in the transverse direction. In general, a web-like surface structure can be referred to as a surface structure whose longitudinal extent and transverse extent is very much greater than the thickness of the surface structure transverse to the longitudinal and transverse direction. For example, the longitudinal extent can be at least 100 times, in particular at least 1000 times, particularly preferably at least 10,000 times greater than the thickness of the fabric. Alternatively or additionally, the transverse extension can be at least 10 times, in particular at least 100 times, preferably at least 1000 times greater than the thickness of the fabric. The thickness of the fabric can preferably be less than 1 cm, in particular less than 0.5 cm, preferably less than 0.1 cm. According to a preferred embodiment, the thickness of the sheet is in the range of 0.1 mm to 3 mm, preferably 0.3 mm to 1.5 mm. The transversal transverse extension of the sheet is in particular at least 10 cm, preferably at least 25 cm, particularly preferably at least 50 cm, and/or, in particular and, not more than 200 cm, in particular not more than 150 cm, preferably not more than 120 cm, in particular preferably no more than 100 cm. The longitudinal longitudinal extent of the sheet is preferably greater than its transverse transverse extent. Alternatively, it can be conceivable that the transversal transverse extent is greater than the longitudinal longitudinal extent of the fabric.

The sheet-like structure according to the invention can, for example, be produced or have been produced as a so-called endless material in sheet form in a sheet direction corresponding to the longitudinal direction. Alternatively, the sheet-like structure according to the invention can be manufactured or have been manufactured in a web direction corresponding to the transverse direction. The sheet-like structure according to the invention can have a length of more than 1.5 m, in particular more than 2 m or more than 3 m, preferably more than 10 m, in the longitudinal direction. In the embodiment according to which the fabric can be flexibly rolled up, the fabric can be designed and set up to be reversibly rolled up with a radius of curvature of less than 20 cm, in particular less than 10 cm, preferably less than 5 cm, particularly preferably less than 1 cm. It is clear that a reversibly rollable surface structure can be rolled up essentially without damage, in particular with regard to the carrier layer, the electrical surface conductors and/or, in particular and, the holding layer without damage, according to the predetermined smallest permissible (or any larger) radius of curvature. In particular with regard to the surface conductors, it is clear that damage-free is to be understood in relation to the function of the surface conductors as an electrical conductor. In particular with regard to a possible decorative layer be clear that damage-free is to be understood in relation to the visible surface quality of the decorative layer.

The flexible, web-like surface structure according to the invention consists of or includes a flexible carrier layer, a large number of electrical surface conductor tracks and a flexible, magnetizable holding layer. In particular, the flat structure consists of the flexible carrier layer, the multiplicity of electrical surface conductor tracks and the holding layer. The carrier layer and/or the holding layer preferably have a substantially uniform width and/or thickness. The flexible backing sheet has a longitudinal extent. The longitudinal extent of the flexible backing sheet is preferably determined in the longitudinal direction. The multiplicity of electrical surface conductors which are longitudinal in relation to the carrier layer in the direction of longitudinal extent are present on the front and/or rear of the carrier layer or are embedded in the carrier layer. The carrier layer is preferably designed and set up for fixing the multiplicity of electrical planar conductors and optionally other components and/or layers of the planar structure. In particular, the carrier layer of the large number of electrical surface conductors can be designed and set up as a mechanical carrier layer, preferably for stabilizing the electrical surface conductor against mechanical stresses such as bending, tension, pressure and/or torsion, in particular as a result of the surface conductors’ own weight. The flexible, magnetizable holding layer is preferably designed and set up to interact with at least one active magnetic holding component, which can in particular be part of a described kit of parts according to the invention and which is preferably connected to a current collector. In particular, the retention layer is designed and configured to enable the sheet to hold in place an active magnetic retention component that is in physical contact with the sheet.

The multiplicity of electrical surface conductors is preferably designed and set up for surface current supply in the low-voltage range. A power supply in the low-voltage range generally refers to a power supply significantly below the mains voltage of 230 V. The power supply in the low-voltage range is preferably a power supply in the range of 48 V or less, in particular 24 V or less, preferably 12 V or less, particularly preferably 6 V or fewer. A planar conductor track can generally refer to an electrically conductive track, the main longitudinal direction of which in particular is significantly greater than its thickness, in particular at least a hundred times greater, preferably at least a thousand times greater. Alternatively or additionally, a surface conductor track can generally refer to an electrically conductive track that has a transversal width transverse to the main extension direction, which is significantly smaller than the longitudinal main extension, in particular at least 10 times smaller or at least a hundred times smaller, and which is significantly larger than the thickness of the planar conductor track, in particular at least 10 times larger or at least a hundred times larger. For example, a planar conductor can have a main longitudinal extension of at least 1 m and a thickness of less than 0.5 mm, in particular less than 0.1 mm, and optionally a transversal width in the range from 1 mm to 10 cm, preferably in the range 1 cm up to 5 cm. The main longitudinal extension of the conductor tracks preferably corresponds to the longitudinal extension of the fabric. It is clear that, in a preferred embodiment, the flat conductor track can be formed as a full-surface conductor track. Alternatively, it is conceivable that the planar conductor track is composed of a large number of thin conductor track sections which, in particular at least in sections, are in the form of a lattice, chessboard pattern, grid pattern, network shape and/or meandering shape, and which together, for example as a network, form the planar conductor track. The distance between adjacent conductor track sections of a surface conductor track is always smaller than a contact point. In combination with the below-described preferred embodiment of a kit-of-parts with at least one current collector with several contact elements, the distance between adjacent conductor track sections of a surface conductor track is always smaller than the largest cross-sectional width of the contact elements.

The fabric according to the invention can also be produced easily and cost-effectively on an industrial scale, can be easily adapted to a wide variety of circumstances and provides reliable and simple electrical contact.

In a first alternative embodiment of the fabric according to the invention, the carrier layer forms the holding layer. In this embodiment, the carrier layer and the holding layer are formed in a functional union. The carrier layer can be formed, for example, in a functional union with the holding layer, in that the entire carrier layer can be magnetized or in that the carrier layer is formed with magnetizable holding sections and/or holding areas. Holding sections and/or holding areas can be embedded in the carrier layer, for example. Holding areas can be present, for example, in conductor-free areas between adjacent surface conductor tracks.

In a second alternative preferred embodiment of the fabric according to the invention, the holding layer is formed separately from the carrier layer. In particular, the holding layer is present on the front or rear of the carrier layer. Preferably, the half telage in the transverse direction in relation to the longitudinal extent of the carrier layer completely, in particular without interruption, along the carrier layer. In particular, the retaining layer extends completely, in particular without interruption, along the carrier layer in the longitudinal direction with respect to the direction of longitudinal extension of the carrier layer. The holding layer can be provided in sections on the front or rear of the carrier layer. The sheet-like structure preferably has a carrier layer-retaining layer laminate structure. It is clear that in the case of fabrics manufactured, for example, in a printing and/or extrusion process, narrow interface areas can be formed between the carrier layer and the separate holding layer in relation to the total thickness of the fabric, where, for example, a material connection between the holding layer and the Carrier layer is formed, in these interface areas no clear subdivision into holding layer or carrier layer on the other hand can be made.

According to an expedient embodiment of the fabric according to the invention with a carrier layer and a separate holding layer thereto, the carrier layer is arranged between the multiplicity of electrical surface conductor tracks and the holding layer. In particular, the holding layer can be in contact with that side of the carrier that is opposite the side of the carrier with the multiplicity of electrical planar conductors. Such an arrangement can be preferred in particular in cases in which the magnetizable holding layer has a certain, possibly low, possibly even high degree of electrical conductivity, with the carrier layer acting as an electrical insulator, in particular with regard to currents in the low-voltage range, between the holding layer on the one hand and the Provides surface conductors.

In a further preferred embodiment of the planar structure according to the invention, which can be combined with the previous ones, the multiplicity of planar conductor tracks has an essentially uniform transversal width. In particular, the multiplicity of surface conductors can have essentially uniform transverse distances between adjacent surface conductors. Alternatively or additionally, the multiplicity of surface conductors has a substantially uniform longitudinal extent, which preferably corresponds to the longitudinal extent of the surface structure. In addition, it can be preferred that the multiplicity of adjacent surface conductor tracks run essentially parallel. In particular, a regular and/or uniform arrangement of the conductor tracks can be defined with the aid of the carrier layer.

According to a preferred embodiment, the multiplicity of adjacent surface conductor tracks are each separated from one another by a conductor-free surface. In this way succeed In general, electrical insulation of adjacent surface conductors. It may be preferable for the surface conductors of the surface structure according to the invention to be divided or subdivided into a first set and a different second set of several electrical surface conductors, with the electrical surface conductors of the first set being separated from the electrical Surface conductor tracks of the second set are separated, in particular electrically isolated. The multiplicity of surface conductors, in particular all surface conductors, are preferably electrically separated from one another, in particular insulated. Electrical connections between, in particular adjacent, surface conductors can preferably be closed by electronic components arranged transversely to the surface conductors, for example a supply line, in particular as described below, and/or a functional object, in particular as described below, and/or a current collector, in particular as described below . The planar structure is preferably free of electrical cross-connections between planar conductors arranged next to one another, in particular adjacently. Since the surface conductor tracks are separated from one another, the surface structure can be adapted particularly well to different spatial conditions, for example to different wall shapes, room heights and so on, for example by shortening. In particular, by splitting off an electrical connection of various planar conductors of the planar structure into additional components, such as a functional object and/or a current collector, it can be achieved that the consequences in the event of damage or incorrect assembly of one or more planar structures can be limited to a small area.

In an expedient embodiment of a surface structure according to the invention with conductor-free surfaces, the conductor-free surface defines a transversal distance between two adjacent surface conductor tracks. The area conductor tracks each have a transversal width between two adjacent conductor-free areas. The transversal width is at least as large as the transversal distance, in particular for at least 5, preferably at least 10, particularly preferably more than 10, or all surface conductor tracks of the surface structure. In particular, the transversal width is greater than the transversal distance, in particular for at least 5, preferably at least 10, particularly preferably more than 10, or all surface conductors of the surface structure. Additionally or alternatively, a transversal module can be defined as the sum of the transversal width of an electrical surface conductor track and twice the transversal distance of the conductor-free surface, in particular adjacent thereto. According to an expedient embodiment of the fabric according to the invention, which can be combined with the previous one, the transversal distance is in the range of at least 1 mm to 10 mm, in particular 2 mm to 5 mm, preferably about 3 mm. Alternatively or additionally, the transverse width is in the range of at least 1 mm to 50 mm, in particular 15 mm to 35 mm, preferably around 25 mm.

In a preferred embodiment of the planar structure according to the invention, it is provided that the adjacent flat conductors of the plurality of adjacent flat conductors have essentially the same lateral distance (transverse distance) from one another and/or, in particular, and that the conductor-free surfaces between adjacent flat conductors of the plurality of adjacent flat conductors are Essentially have a uniform width.

In an expedient embodiment of the fabric according to the invention, which can be combined with the previous ones, the carrier layer comprises or consists of a foil, paper, fleece, woven, knitted or knitted web that can be shortened. The carrier layer can comprise or consist of several different lengths of film, paper, fleece, fabric, knitted fabric or knitted fabric that can be shortened. The fleece web is preferably based on synthetic, cellulose and/or glass fiber fleeces.

According to a particularly preferred embodiment, the magnetizable holding layer comprises ferrimagnetic and/or ferromagnetic materials, which in particular contain magnetite or consist of magnetite. The separate holding layer or the holding layer forming the carrier layer can contain particulate magnetizable materials, in particular ferrimagnetic and/or ferromagnetic materials. Among these particulate magnetizable materials, ferrites, especially magnetite, iron powder, especially ferromagnetic iron powder and/or carbonaceous iron powder, and any mixtures thereof are particularly preferred. Among the particulate magnetizable materials mentioned, magnetite is particularly preferably used. Such particulate magnetizable materials that have an average particle size D50 in the range from 10 to 100 μm, preferably in the range from 20 to 30 μm, have proven to be particularly suitable for solving the problem on which the invention is based. The average particle size D50 can be calculated according to DIN ISO 9276-1:2004-09 (Representation of the results of particle size analysis - Part 1: Graphic representation) and ISO 9276-2:2014-05 (Representation of the result of particle size analysis - Part 2: Calculation of average Particle sizes/diameters and moments from particle size distributions) can be determined. The so-called Laser Scattering Particle Size can be used to determine the D50 values Distribution analyser, such as that available from Horiba under the device designation “LA 950 V2”.

In particular, the fabric according to the invention can also comprise at least one decorative coating which is present on the front side of the carrier layer or on the magnetizable holding layer, in particular on a visible surface of the fabric. By providing the decorative layer, the fabric can be equipped with any visible surface that is in particular independent of the number, shape, design, color, etc. of the carrier layer, surface conductors and/or holding layer. While the optics of the carrier layer, surface conductor tracks and holding layer are essentially predetermined by their functional properties, it can be desirable to design the surface structure detached from these optics. A transparent decorative layer can be provided if a sheet-like appearance is desired that is shaped by the carrier layer, holding layer and/or surface conductors.

In a preferred embodiment of a planar structure according to the invention, the multiplicity of longitudinal electrical planar conductors is selected from the group consisting of metallic planar conductors, in particular made of copper and/or aluminum foil, tracks made of electrically conductive ink applied in particular by means of printing processes, conductive polymer compounds and carbon fiber-based systems.

According to one embodiment of a planar structure according to the invention, it is provided that the planar structure has a transverse width of at least 20 cm, in particular at least 50 cm, preferably at least 75 cm, particularly preferably over the entire transverse width of the planar structure, transversely, preferably orthogonally, to the web direction of the planar structure at least one longitudinal electrically surface conductor track per 10 cm transverse width, in particular per 5 cm transverse width, preferably per 3 cm transverse width, of the fabric. In particular, the planar structure comprises at least 10, in particular at least 20, longitudinal electrical planar conductors. Such a density of planar conductors along a cross section, in particular transversely, preferably orthogonally, to the direction of the track has proven to be particularly suitable for a safe and reliable planar power supply.

Preferably, the fabric according to the invention can be shortened in the longitudinal and/or transverse orientation, preferably while maintaining its function. Particularly preferably, the fabric according to the invention can be shortened like conventional wallpaper in order to make the fabric usable like wallpaper. With the invention Large surfaces, for example walls and ceilings of buildings, such as walls and ceilings of living spaces, can be occupied in a simple manner, in particular by untrained personnel or laypersons, in order to provide a reliable and safe area power supply, in particular in the low-voltage range, in particular in combination with a magnetic holding structure .

In a preferred embodiment, the fabric according to the invention is provided with an adhesion promoter that is designed and set up for attaching the fabric to a substrate. In particular, the flexible carrier layer and/or the holding layer is provided with the adhesion promoter. The subsoil is preferably a building surface, such as a building wall or a building ceiling. In particular, the fabric has an adhesive layer that includes or consists of the adhesion promoter. The adhesion promoter is preferably designed and set up so that it can be detached from the substrate, in particular without leaving any residue and/or damage. Preferably, the substrate can be a building wall with a surface coating, such as a paint coating, wallpaper or the like.

The invention also relates to a kit of parts, which has at least one fabric, in particular a large number of fabrics, as described above, and at least one current collector for an electrical consumer, comprising at least 2 or 3, preferably at least 5 and particularly preferably exactly 5 , electrically conductive contact elements. The electrically conductive contact elements are designed and set up to interact with at least two adjacent electrical surface conductor tracks.

The kit of parts is preferably designed and set up so that the planar conductors, in particular through the described supply line(s), exclusively at connection ends arranged next to one another, in particular along the longitudinal edge and/or in the connection area, for an electrical connection contactable or contacted. In particular, it can be provided that on a respective surface structure the surface conductors each have a second end in the longitudinal direction opposite to the connection end, the second ends being arranged adjacent to one another, it being provided in particular that the second ends are free of contact for electrical connection with the utility line or other power source. It should be understood that the terminal ends and the second ends may be structurally similar. In particular, the second ends of a first sheet section and the connecting ends of a second sheet section can be cut by dividing, preferably shortening, a sheet in the transverse direction across, in particular orthogonal to the longitudinal direction, in particular each fabric section forming a new fabric.

A kit of parts according to the invention with a magnetic or magnetizable holding layer and/or magnetic or magnetizable carrier system has the advantage that, for example in rented apartments, objects can be attached to a building surface, such as a building wall or building ceiling, without damage by means of magnetic adhesion. A particular advantage of the present invention is also that the attachment of the kit of parts according to the invention does not necessarily require the use of electricians or trained specialist personnel in the electrical field, but can also be carried out, for example, by personnel from the painting trade or drywall construction.

In particular, the contact elements of the current pickup are matched to the surface conductors in such a way that at least two of the contact elements of the same current pickup can be brought into contact with different, in particular adjacent, surface conductors, preferably on the one hand a first set of electrical surface conductors and on the other hand a second set of electrical surface conductors. For this purpose, for example, the size, shape and spacing of the contact elements can be matched to the size, shape and spacing of the planar conductors. Preferably, at least a first of the several contact elements can be brought into contact with at least one surface conductor of a first set and at least a second of the several contact elements can be brought into contact with at least one surface conductor of a second set, in particular independently of the position and orientation of the current collector.

In a particularly preferred embodiment of the kit of parts according to the invention, the current collector has a magnetically active holding means, in particular a magnetically active holding rear side. A magnetically active holding backside can preferably be designed and arranged to cooperate with the holding layer of the sheet in order to hold the current collector securely on the sheet and/or, in particular and, to hold the contact elements of the current collector for an electrical connection against, in and/or or to push through the area conductors.

In an expedient embodiment of a kit of parts according to the invention, the current collector for the electrical load represents a contacting adapter containing a rectifier circuit. The rectifier circuit is preferably designed and set up to supply the load with a predetermined rectifier To ensure current, regardless of which or which of the several contact elements with which surface conductor is in electrical contact connection or are.

According to a preferred embodiment of the kit of parts according to the invention, which can be combined with the previous one, several, in particular all, of the contact elements lie in a circular ring, in particular on a circumference. Alternatively or additionally, it can be provided that several, in particular all, adjacent contact elements (of the same current collector) are essentially the same distance apart. The distances between adjacent contact elements can deviate from one another by less than ±20%, in particular by less than ±10%, preferably by less than ±5%. In particular, several, preferably all, of the contact elements form a preferably equilateral polygon. It is clear that the contact elements forming the polygon are arranged at the corners of the polygon. At least one or precisely one contact element can preferably be arranged within the polygon, in particular in the center point of the polygon.

According to a further preferred embodiment of the invention, which can be combined with the previous ones, at least one pair of contact elements of the same current pickup has a contact distance between them. It is clear that the pair of contact elements can consist of a first contact element connectable or connected to a first surface conductor track, in particular a first set of surface conductor tracks, and a second contact element connectable or connected to a second surface conductor track, in particular a second set of surface conductor tracks. Furthermore, it is clear that the current collector can be designed, for example, with a large number of, for example three, contact elements which can be combined in a permutation manner as a plurality of pairs, for example three pairs. In another example of a current pickup with five contact elements, for example, the contact elements can be combined in ten pairs in a permutation manner. The contact distance is preferably greater than the sum of the transversal width of an electrical surface conductor track and the transversal distance of the conductor-free surface. In particular, the contact spacing is smaller than the sum of twice the transversal width of an electrical surface conductor track and the transversal spacing of the conductor-free surface. Preferably, the contact spacing can essentially correspond to the transversal module, in particular the transversal module can be dimensioned slightly larger than the contact spacing in order to ensure that the current collector can be attached in a short-circuit-proof manner, taking into account the cross-sectional size of the contact elements. perform and / or to minimize the probability that no circuit is closed when connecting the current collector to the surface structure with the surface conductors. In particular, it can be assumed that the contact spacing and transverse modulus are essentially the same if the contact spacing differs from the transverse modulus by no more than ±20%, in particular by no more than ±10%, preferably by no more than ±5%. It may be preferred that the contact spacing is at least as large as the transverse modulus. Particularly preferably, the contact distance is 0% to 20% greater, in particular 0.1% to 10% greater, preferably 0.5% to 5% greater than the transversal modulus.

According to a preferred embodiment of the kit of parts according to the invention, the contact elements are needle-shaped, in particular with a conically shaped insertion end. In particular, at least one, at least two or all of the contact elements of a current collector can be needle-shaped. The shape of the needle is preferably adapted to the carrier system, in particular the carrier layer, and the surface conductors in such a way that the contact elements can penetrate the surface conductors. Alternatively or additionally, the contact elements can be designed in the form of pins, in particular with a cylinder section or consisting of a cylinder section. In particular, it can be provided that the contact elements are designed in the shape of nails, with a cylindrical section and a conically shaped end.

In particular, according to a particularly expedient embodiment of the kit of parts according to the invention, the contact elements, in particular all contact elements of one or more current collectors, can have a cross-sectional width that is smaller than the transverse distance. In particular, the cross-sectional width can essentially correspond to half the transverse distance. Alternatively or additionally, the cross-sectional width is at least 0.5 mm, preferably at least 1 mm, smaller than the transverse distance. The cross-sectional width is preferably in the range from 0.25 mm to 1.5 mm, in particular in the range from 0.4 mm to 1 mm, preferably in the range from 0.5 mm to 0.8 mm.

Alternatively or additionally, according to a suitable embodiment of the kit of parts according to the invention, it can be provided that the contact elements have a contact element length, for example a needle length, which is greater than a track thickness of the surface conductor tracks and/or is greater than a layer thickness of the carrier layer and/or the holding layer, in particular greater than a system thickness of the fabric, in particular the carrier layer. In particular, the length of the contact element is at least as great as the sum of the web thickness and layer thickness of the carrier layer and optionally the holding layer. The kit-of-parts according to the invention can in particular also have at least one, in particular two-wire, electrical supply line designed and set up for electrically connecting the planar conductors of the planar structure to a power source, in particular a direct current source, preferably in the low-voltage range. The supply line preferably comprises a first electrically conductive conductor strip which is connected or can be connected to a first pole of a direct voltage source and/or a second electrically conductive conductor strip which is connected or can be connected to a second pole of a direct voltage source. The poles of this DC voltage source preferably have a potential difference in the low-voltage range. The first conductor strip can have a multiplicity of contact points for electrically conductive connections with connection ends of a first set of electrical surface conductor tracks with the first electrically conductive conductor strip. The second conductor strip can have a multiplicity of contact points for the electrically conductive connection with connection ends of a second set of electrical planar conductor tracks with the second electrically conductive conductor strip. The supply line can be provided with contact points whose shape, size and/or distance along the supply line is matched to the planar conductors of the planar structure.

The kit-of-parts according to the invention can also include at least one cover strip, such as a skirting board or a ceiling strip. In particular, the supply line is housed in the cover strip. Alternatively or additionally, the cover strip can have a magnetically active back. An advantage of this embodiment of the kit of parts according to the invention can be seen in the fact that a secure mechanical contact between the conductor strips and the corresponding surface conductors can be supported using a magnetic force, for example between the cover strip and the carrier system.

In a particularly preferred embodiment of the kit-of-parts according to the invention, this also includes at least one functional object with a magnetically active rear side for arrangement on a visible surface of the fabric, the functional object being an active functional object and comprising the current collector. The at least one functional object can be, for example, a passive functional object, such as a picture, a picture frame, a magnetic holder, a whiteboard, a blackboard, a shelf, a wall folding table, in particular containing a decorative element, a projection surface, a mirror, a candle holder, a curtain holder, Wooden panels, picture ledges, tiles, rails, a vase, an organizer bar, an organizer or a wall cabinet, an insulating board or an acoustic panel. The at least one function object can for example be an active functional object such as a wall clock, a screen, a decorative fireplace, a USB charging station, a baseboard, a lamp, a home automation switch, a speaker, a radio, an ActiveNoise Canceling system, a heating element, a smoke detector , GPS tracker, liquid dispenser, such as a soap dispenser or the disinfectant dispenser, and/or a sensor, such as a room sensor, for example a temperature sensor, noise sensor, brightness sensor, movement sensor, hygrometer, person sensor, vibration sensor. The functional object can include several passive and/or active functional objects. The at least one active functional object preferably comprises at least one electrical consumer, which can be supplied or is supplied with electricity in the low-voltage range by the fabric. The functional object preferably includes precisely one or more current pickups with a plurality of contact elements, as described above. In particular, the functional object can include at least one electrical consumer with a current collector.

The invention also relates to a building wall or ceiling containing at least one fabric according to the invention as described above or at least one kit-of-parts according to the invention as described above. The building wall is equipped with a magnetic holding layer at least in places, preferably over the entire surface. The magnetic retaining layer may be, for example, a magnetic paint layer or a layer of magnetic putty.

The invention also relates to the use of a flat structure as described above, a kit-of-parts as described above and/or a building wall as described above.

Further properties, features and advantages of the invention become clear from the following description of a preferred embodiment of the invention with reference to the attached drawing, in which:

FIG. 1 shows a schematic representation of an interior wall of a room which is covered with several of a fabric according to the invention;

FIG. 2 shows a perspective representation of a contact strip;

FIG. 3 shows a schematic rear view of a contact strip;

FIG. 4 shows a schematic representation of an exemplary embodiment of a kit-of-parts according to the invention with a fabric according to the invention and two different current collectors; FIG. 5 shows a schematic representation of an exemplary embodiment of a kit-of-parts according to the invention with a sheetlike structure according to the invention and a current collector;

FIG. 6 shows a schematic sectional view of an exemplary embodiment of a fabric according to the invention with a functional object;

FIG. 7 shows a schematic representation of a second exemplary embodiment of a fabric according to the invention; and

FIG. 8 shows a schematic representation of another exemplary embodiment of a fabric according to the invention.

It should be clear that the systems and devices according to the invention, which are presented as examples below with reference to the figures and which can be designed and set up in particular for carrying out a method according to the invention, are only shown schematically in the present disclosure and described as examples. Within the scope of the disclosure, numerous variations are conceivable compared to the preferred embodiments illustrated by way of example.

1 schematically shows a building wall which is covered with several surface structures 3 designed like wallpaper according to the invention. The objects attached to the building wall can be considered as kit-of-parts 1. The kit-of-parts 1 in the illustrated embodiment comprises a plurality of sheet-like structures 3, each with a large number of longitudinal sheet conductors 5, 6, and a contact strip 2, which is described in more detail below with reference to FIGS. The configuration of the planar structure 3 and that of the planar conductors 5, 6 is explained in more detail with reference to FIGS.

The flat structures 3 provide a surface power supply in the low-voltage range with, for example, 12 V on the inner wall of the room shown. Various functional objects 100 are held on the wall by the planar structure 3 and/or supplied with electrical energy in the low-voltage range. An exemplary functional object 100 is the lamp 120. Another exemplary functional object 100 is the flat heating element 130. The flat structures 3 supply the lamp 120 and the heating element 130 with current in the low-voltage range. The active functional objects 120, 130 include electrical consumers and are to supply these electrical consumers with one or more power consumption mers equipped (not shown in Fig. 1). The current pickups are designed and set up to establish an electrical connection with the surface conductor tracks 5, 6 in order to supply the active functional objects 120, 130 with electrical energy.

The surface structures 3 are equipped with a large number of electrical conductor tracks 5, 6, which extend in the longitudinal direction L, for surface power supply. The transverse width b of the conductor tracks 5, 6 in the transverse direction T across, in particular orthogonal to the longitudinal direction L, is smaller by orders of magnitude than their longitudinal extension. The conductor tracks 5, 6 are strip-shaped. The thickness of the surface conductor tracks 5, 6 is very much smaller than their longitudinal extension and significantly smaller, in particular smaller by orders of magnitude, than the transversal width b.

In the area of the surface structure 3, the conductor tracks 5, 6 are not electrically connected to one another but are electrically insulated from one another, in particular by conductor-free areas 39. The conductor tracks 5 and 6 can be divided into a first set of conductor tracks 5 and a second set of conductor tracks 6, in particular on the basis of their electrical properties and/or spatial arrangement. The conductor tracks of the first set of conductor tracks 5 and those of the second set of conductor tracks 6 are arranged alternately on or in the fabric 3 . All conductor tracks 5 and 6 have connecting ends 51 and 61 arranged next to one another. In the embodiment shown in FIG. 1, all connecting ends 51, 61 are located at the lower longitudinal end of the fabric 3 in the vertical direction V (here corresponding to the longitudinal direction L). The connecting ends 51, 61 are arranged in the area of the contact strip 2, which is formed here as a cover strip 20, namely as a baseboard. In alternative, non-illustrated embodiments, the contact strip could be formed as a ceiling strip or as a strip extending in the transverse direction or across the sheet. The distance between the first conductor strip 25 and the second conductor strip 26 in the longitudinal direction L is small, so that the connection ends 51 and 61 are arranged next to one another.

Exemplary contact strips 2 are shown in FIGS. Concealed inside the cover strip 20 are conductor strips 25, 26 for the power supply of the conductor tracks 5, 6. A first conductor strip 25 is electrically connected to the connection ends 51 of the first set of electrical conductor tracks 5 . A second conductor strip 26 is electrically connected to the connection ends 61 of the second set of electrical conductor tracks 6 . The first conductor strip 25 can be connected to a first pole 75 of a direct current source 7 and the second conductor strip 26 connected to the second pole 76 of this direct current source 7, with a potential difference in the low-voltage range prevailing between the direct current sources.

In the preferred embodiment shown here, the functional objects 100 are equipped with a magnetically active rear side 104 (not shown). The sheet-like structure 3 comprises a magnetizable or magnetic retaining layer 34. The retaining layer 34 cooperates with the magnetically active rear side 104 of the functional objects 100 in order to reversibly hold them in place on the wall. The picture in the picture frame 110 can be a passive functional object without electrical consumers and accordingly without current consumers.

The perspective view of the contact strip 2 formed as a cover strip 20 in FIG. 2 shows its rear side 21 on the wall side, on which the contact points 27 and 28 are provided. So that the first conductor strip 25 electrically contacts the conductor tracks of the first set of conductor tracks 5 and the second conductor strip 26 electrically contacts the conductor tracks of the second set of conductor tracks 6, the first contact points 27 of the first conductor strip 25 are in the transverse direction T relative to the second contact points 28 of the second Ladder strip 26 offset. The offset of the first and second contact points 27, 28 to one another in the transverse direction T can correspond to the distance between adjacent conductor tracks 5 and 6. In addition, it can be provided that the first contact points 27 of the first conductor strip 25 are offset in the longitudinal direction L, which corresponds to the vertical direction V here, relative to the second contact points 28 of the second conductor strip 26 .

3 shows a schematic representation of a front side or a cross section of an electrical contact strip 2. The electrical contact strip 2 can be formed as a cover strip 20; in this case, however, the embodiment shown in FIG. 3 lacks a screen. The view in FIG. 3 is free of the first conductor strip 25 and the second conductor strip 26, which are arranged parallel to one another in channel-shaped receptacles 22 of the electrical contact strip 2. The DC voltage source 7, for example a power pack, has a first pole 75 and a second pole 76. The first conductor strip 25 is connected to the first pole 75 and the second conductor strip 26 to the second pole 76.

The contact strip 2 can be formed like a profile, for example it can be extruded. To shorten or shorten the contact strip, the contact strip 2 is provided with notches 23 or other predetermined breaking points at regular intervals. Figures 4 and 5 show different current collectors 8 and 8 ', which cooperate with the surface conductors 5 and 6 of the first and second set. The current pickup 8 shown on the left in FIG. 4 'comprises 4 electrical contact elements 81, 82, 83 and 84'. Three of the contact elements 81, 82 and 83 are arranged in pairs at the same contact distance k relative to one another and span an isosceles triangle. These contact elements 81, 82, 83 lie on a circumference 80. The fourth electrical contact element 84' is arranged in the middle of the triangle, in particular at its center. The contact elements 81, 82, 83 and 84' have the same needle-like shape and cross-sectional width p. A first contact element 81 forms an electrical connection with a first flat conductor track 5. A second and a third contact element 82, 83 form an electrical contact with the second flat conductor track 6. The fourth contact element 84' is located in the conductor-free area 39 between the adjacent conductor tracks 5 and 6. The current pickup 8' comprises a contacting adapter, not shown in detail, with a rectifier circuit, not shown in detail, which is set up so that an electrical load can always be supplied with electrical energy by the current pickup 8', regardless of which or which of the various contact elements 81, 82, 83, 84' are in contact with the first or second surface conductor 5 or 6 as long as there is a potential difference only at the contact element pair (here: 81-83 or 81-82).

The other current pickup 8 shown in FIG. 4 comprises five contact elements 81, 82, 83, 84 and 85 arranged at equal intervals on a circumference 80. The contact elements 81, 82, 83, 84 and 85 form the corners of an isosceles pentagon. With the exception of the shape, essentially the same applies to this current pickup 8 as to the current pickup 8 described above. Contact element pairs (here: 81-84 or 82-84) are also on the current pickup 8 on the one hand with a conductor track 5 of the first set and on the other hand in electrically conductive connection with a conductor track 6 of the second set. In the example shown, there are two contact elements 83, 85 in the conductor-free area 39.

In the illustrated embodiments, the various surface conductor tracks 5, 6 have a uniform transverse width b. The conductor-free areas define a transversal distance t between the adjacent surface conductor tracks 5, 6. The adjacent surface conductors 5 and 6 are oriented parallel to one another.

In the case of the kit of parts 1 illustrated in FIG. The Current collector 8 in turn has an isosceles pentagon configuration of the contact elements 81, 82, 83, 84, 85. Between adjacent surface conductor tracks 5 and 6, a conductor track-free area 39 is provided. All surface conductors 5, 6 have essentially the same transverse width b and the same transverse distance t to the respective adjacent surface conductor 6 or 5. The transverse distance t between two adjacent surface conductors 5 and 6 is smaller than the transverse width b, preferably smaller than half the transverse width 5 , particularly preferably less than a quarter of the transverse width and / or greater than a twentieth, in particular greater than a tenth. The cross-sectional width p of the contact elements is the same size and, in particular 1 mm, smaller than the transversal distance t.

Opposite contact elements 81, 82, 83, 84, 85 can be considered in pairs, with the pairs being spaced apart from one another by a contact distance k. In the isosceles pentagon shown, the contact distances k of all pairs are the same. Other configurations are conceivable. The contact distance k of the current collector 8 is greater than the sum of a transverse width b and a transverse distance t, in particular greater than a transverse modulus h, the transverse modulus h corresponding to the sum of two transverse distances t and a transverse width b. The contact distance k of the current pickup 8 is smaller than the sum of two transverse widths b and a transverse distance t.

The above statements based on a current pickup 8 with pentagonally arranged contact elements 81, 82, 83, 84, 85 apply correspondingly to other polygonal configurations.

6 shows an exemplary cross-sectional view of a sheet 3. In this sheet 3, the sheet conductors 5 and 6 are provided on the back surface of the carrier layer 31 of the sheet 3. FIG. The flat structure 3 can be formed, for example, as a web material, for example as a fleece layer, in particular based on plastic, cellulose or glass fiber fleeces. The carrier layer 31 can alternatively or additionally be realized as a plastic film.

Other configurations of the planar structure 3 are conceivable, for example the planar conductors 5 and 6 could be arranged on different sides of the carrier layer 31 or on the front side of the carrier layer 31 . Alternatively, it is conceivable that the surface conductor tracks 5 and 6 and/or the holding layer are embedded in the carrier layer 31 (not shown). The carrier layer 31 can realize a magnetic or magnetizable holding layer in functional union. In the preferred embodiment shown in FIG. 6, a magnetizable support layer 34 is seen on the carrier layer 31. A decorative coating 30 is provided on the front side of the fabric 3 . The surface structure 3 cooperates with a functional object 100. The functional object has several needle-shaped contact elements 81 (only one shown), which are designed and set up to penetrate into the surface structure 3 and brought or can be brought into physical contact with the surface conductor track 5/6. The needle-shaped contact elements 81 are preferably designed to penetrate at least the planar conductor track 5 or 6, in particular the planar structure 3. The surface conductor tracks 5 and 6 have a track thickness. The web thickness is less than 1 mm, in particular less than 0.1 mm. The needle length of the contact element 81 is greater than the web thickness. The fabric 3 has a system thickness. The needle length is preferably at least as great as the system thickness.

FIG. 7 shows a schematic representation of a second exemplary embodiment of a sheet material 3 according to the invention. The web of support layer 34 includes large proportions of a ferromagnetically receptive material. The conductor tracks 5 and 6 are attached to the fleece that forms the carrier and holding layer 31 , 34 . The conductor tracks 5, 6 can be attached directly to the back of the magnetic fleece. The conductor tracks 5, 6 can be covered with a front and/or rear lamination. Optionally, the conductor tracks 5, 6 are integrated into the fleece. The conductor tracks 5, 6 can be attached directly to the back of the magnetic fleece. The magnetic fleece can be self-adhesive. On the visible front side of the carrier system 3, a decorative layer 30 is formed by an optically aesthetically high-quality cover coating that is easy to further process. The fabric 3 can be attached to the substrate 40 with adhesion promoter. The fabric can be equipped on its back with an adhesive layer of adhesion promoter.

Figure 8 shows a schematic representation of another exemplary embodiment of a planar structure 3 according to the invention. In this case, the planar conductors 5, 6 can be applied to a magnetically active foil or a magnetically active nonwoven, which (s) serves in functional union as a carrier layer 31 and first holding layer 34a. On the inside of the room, a cover layer can be provided as a decorative layer 30a. On the substrate 40, for example a concrete wall or other building wall, a further second holding layer 34b is attached, for example as a fleece. An adhesive layer made of an adhesion promoter (not shown in detail) is provided on the fabric in order to attach the fabric 3 to the substrate 40 . The retaining layer is covered by a second cover layer 30b, which ensures that the second retaining layer 34b cannot be seen. Such a configuration with a plurality of magnetizable holding layers 34a, 34b can provide a particularly high magnetic adhesive force.

The features of the invention disclosed in the above description, the drawings and the claims can be essential both individually and in any combination for the realization of the invention in its various embodiments.

reference character list

Kit-of-parts electrical contact strip

fabric

area track

DC voltage source, 8' current pickup 0 cover strip 1 rear 2 mounts 5 first conductor strip 6 second conductor strip 7 contact point 8 contact point 0, 30a, 30b cover layer 1 carrier layer 4, 34a, 34b holding layer 0 underground 1 connection end 1 connection end 1 first pole 2 second pole 0 circle 1 Contact element 2 contact element 3 contact element 4 contact element 4' contact element 5 contact element 0 functional object 4 magnetically active rear side 10 picture frame 0 lamp 30 heating element b transverse width h transverse modulus k pair spacing p transverse width t transverse spacing

H horizontal direction

L longitudinal direction

T transverse direction

V vertical direction

Claims

Flexible, in particular rollable, sheet-like structure, consisting of or comprising, in particular consisting of, a) a flexible carrier layer with a longitudinal extent, b) a large number of longitudinal electrical surface conductors in relation to the carrier layer with longitudinal extent, the plurality of electrical surface conductors on the front and/or rear of the carrier layer and/or embedded in the carrier layer, and c) a flexible, magnetizable retaining layer, with the carrier layer forming the retaining layer or with the retaining layer being formed separately from the carrier layer, with the retaining layer and the The carrier layer forms a layered composite, with the retaining layer being present on the front or rear of the carrier layer in particular. Flat structure according to Claim 1, characterized in that the carrier layer is arranged between the plurality of electrical planar conductors and the holding layer, in particular the holding layer abuts that side of the carrier layer which is the side with the plurality of electrical

Surface conductors is opposite. Flat structure according to one of the preceding claims, characterized in that the multiplicity of flat conductor tracks have a substantially uniform transverse width (b). Flat structure according to one of the preceding claims, characterized in that the multiplicity of flat conductor tracks have a substantially uniform longitudinal extent. Flat structure according to one of the preceding claims, characterized in that the multiplicity of adjacent flat conductor tracks run essentially parallel. Flat structure according to one of the preceding claims, characterized in that the multiplicity of adjacent surface conductor tracks are each separated from one another, in particular electrically insulated, by a conductor-free surface. Flat structure according to Claim 6, characterized in that the conductor-free surface (39) defines a transverse distance (t) between two adjacent surface conductors and the surface conductors each have a transverse width (b) between two adjacent conductor-free surfaces (39), the transverse width (b ) is at least as great as, in particular greater than, the transversal distance (t) and/or wherein a transversal module (h) is defined as the sum of the transversal width (b) of an electrical surface conductor track and twice a transversal distance (t) of the conductor-free ones area (39). Flat structure according to claim 6 or 7, characterized in that the transverse distance (t) is in the range of at least 1 mm to 10 mm, in particular 2 mm to 5 mm, preferably around 3 mm, and / or, in particular and that the Transverse width (b) is in the range of at least 1 mm to 50 mm, in particular 15 mm to 35 mm, preferably about 25 mm. Flat structure according to one of the preceding claims, characterized in that the adjacent surface conductors of the plurality of adjacent surface conductors have essentially the same lateral distance from one another and/or that the conductor-free surfaces between adjacent surface conductors of the plurality of adjacent surface conductors essentially have a uniform width. Flat structure according to one of the preceding claims, characterized in that the carrier layer comprises or consists of a foil, paper, fleece, woven, knitted or knitted web, in particular a web which can be shortened. Flat structure according to Claim 10, characterized in that the fleece web is based on synthetic, cellulose or glass fiber fleeces. Flat structure according to one of the preceding claims, characterized in that the holding layer comprises or represents a plastic film, wallpaper or a fleece, woven, knitted or crocheted layer, in particular based on cellulose or glass fibers. Flat structure according to one of the preceding claims, characterized in that the magnetizable holding layer comprises ferrimagnetic and/or ferromagnetic materials, in particular containing or consisting of magnetite. Flat structure according to one of the preceding claims, further comprising d) at least one decorative coating present on the front side of the carrier layer or on the magnetizable holding layer, in particular present on a visible surface of the flat structure. Flat structure according to one of the preceding claims, characterized in that the multiplicity of longitudinal electrical surface conductors is selected from the group consisting of metallic surface conductors, in particular of copper or aluminum foil, paths of electrically conductive ink applied in particular by means of printing processes, conductive polymer compounds and carbon fibers -based systems. Flat structure according to one of the preceding claims, characterized in that the flat structure has a transverse width of at least 20 cm, in particular at least 50 cm, preferably at least 75 cm, particularly preferably over the entire transverse width of the flat structure, transversely, preferably orthogonally, to the web direction of the Surface structure comprises at least one longitudinal electrical surface conductors per 10 cm transverse width, in particular per 5 cm transverse width, preferably per 3 cm transverse width, of the surface structure, wherein the surface structure comprises in particular at least 10, in particular at least 20, longitudinal electrical surface conductors. Flat structure according to one of the preceding claims, characterized in that it can be shortened in the longitudinal and/or in the transverse direction. Flat structure according to one of the preceding claims, characterized in that the multiplicity of flat conductor tracks has connection ends arranged next to one another. Flat structure according to one of the preceding claims, characterized in that the flat structure, in particular the flexible carrier layer and/or the holding layer, is designed with an adhesion promoter and set up for fastening the flat structure to a substrate, such as a building surface, for example a building wall or building ceiling, wherein the fabric has in particular an adhesive layer comprising or consisting of an adhesion promoter. Flat structure according to one of the preceding claims, characterized in that the flat structure can be rolled up, in particular reversibly, about a roll axis in the longitudinal direction and/or in the transverse direction, the flat structure preferably having a radius of curvature of less than 20 cm, in particular less than 10 cm, preferably less than 5 cm, can be rolled up. Kit-of-parts, comprising i) at least one fabric, in particular a multiplicity of fabrics, according to one of the preceding claims and ii) at least one current collector for an electrical consumer, comprising at least two or three, preferably at least five and particularly preferably exactly five, electrically conductive contact elements, designed and set up to interact with at least two adjacent electrical surface conductor tracks. Kit of parts according to Claim 21, characterized in that the current collector has a magnetically active holding means, in particular a magnetically active holding rear side. Kit of parts according to Claim 21 or 22, characterized in that the current collector for an electrical load represents a contacting adapter containing a rectifier circuit. Kit-of-parts according to claims 21 to 23, characterized in that several, in particular all, of the contact elements lie in a circular ring, in particular on a circumference, and/or that adjacent contact elements are essentially the same distance apart, with in particular several preferably all of the contact elements form a preferably equilateral polygon, wherein preferably at least one or precisely one contact element (84^) is arranged in the polygon, in particular in the center of the polygon. Kit of parts according to one of Claims 21 to 24, characterized in that at least one pair of contact elements of the same current collector has a contact distance from one another which is greater than the sum of the transverse width (b) of an electrical surface conductor track and the transverse distance (t) the conductor-free area and/or, in particular and, which is smaller than the sum of twice the transverse width (b) of an electrical surface conductor track and the transverse distance (t) of the conductor-free area, the contact distance preferably corresponding essentially to the transverse modulus (h). Kit of parts according to one of Claims 21 to 25, characterized in that the contact elements are designed in the form of needles, in particular with a conically shaped insertion end. Kit of parts according to Claim 26, characterized in that the contact elements have a cross-sectional width (p) which is smaller than the transverse distance (t), in particular essentially corresponds to half the transverse distance (t) and/or at least 0.5 mm, preferably at least 1 mm, is smaller than the transverse distance (t). Kit of parts according to Claim 26 or 27, characterized in that the contact elements have a needle length (n) which is greater than a track thickness (d) of the surface conductor tracks and/or, in particular and, is greater than a system thickness (s) of the fabric. Kit-of-parts according to one of Claims 21 to 28, further comprising at least one, in particular two-wire, electrical supply line, designed and set up for electrically connecting the planar conductors of the planar structure to a power source, in particular a direct current source, preferably in the low-voltage range. Kit-of-parts according to one of Claims 21 to 29, further comprising at least one cover strip, such as a skirting board or ceiling strip, with the supply line in particular being accommodated in the cover strip, and/or, in particular and, the cover strip having a magnetically active rear side . Kit-of-parts according to any one of claims 21 to 30, further comprising at least one functional object with a magnetically active rear side for arranging on a visible surface of the fabric, wherein in particular the functional object is an active functional object and comprises the current collector. Building wall or ceiling containing at least one fabric according to one of Claims 1 to 20 and/or at least one kit of parts according to one of Claims 2 I to 31, the building wall being equipped with a magnetic holding layer at least in places, preferably over the entire surface . Use of a flat structure according to one of claims 1 to 20, a kit-of-parts according to one of claims 21 to 31 or a building wall or ceiling according to claim 32 in or on a building.