System for a Presentation, Sales or Exhibition Stand and/or for Store Fitting, as well as Current Collectors for an Electrical Consumer in such a System and its Use

Abstract

The present disclosure relates to a system for a presentation, sales or exhibition stand and/or for store fitting, the system comprising a current-carrying wall member and a current collector for an electrical device, which is configured to be mounted on the wall member; wherein the wall member comprises a carrier plate and a cover that covers the carrier place; wherein the wall member comprises first electrical conductor tracks of a first polarity and second electrical conductor tracks of a second polarity, wherein the first and second electrical conductor tracks are arranged alternately at least in sections; wherein the current collector comprises a plurality of at least three contact needles, wherein the current collector is adapted to be attached to the wall member such that at least one of the contact needles contacts one of the first electrical conductor tracks and at least another of the contact needles contacts one of the second electrical conductor tracks; and wherein a first contact needle, a second contact needle, and a third contact needle of said plurality of contact needles are arranged on a circle. The present disclosure further relates to a corresponding current collector and corresponding method.

Claims

1. A system, in particular for a presentation, sales or exhibition stand and/or for store fitting, the system comprising: a current-carrying wall member and a current collector for an electrical device, which is configured to be mounted on the wall member; wherein the wall member comprises a carrier plate and a cover that covers the carrier plate; wherein the wall member comprises first electrical conductor tracks of a first polarity and second electrical conductor tracks of a second polarity, wherein the first and second electrical conductor tracks are arranged alternately at least in sections; wherein the current collector comprises a plurality of at least three contact needles, wherein the current collector is adapted to be attached to the wall member such that at least one of the contact needles contacts one of the first electrical conductor tracks and at least one other of the contact needles contacts one of the second electrical conductor tracks; and wherein a first contact needle, a second contact needle, and a third contact of said plurality of contact needles are arranged on a circle.

2. The system according to claim 1, wherein the first, the second and the third contact needle of the current collector are arranged in such a way that they form a triangle.

3. The system according to claim 2, wherein the first, the second and the third contact needle of the current collector are arranged in such a way that they form an isosceles triangle.

4. The system according to claim 2, wherein the first, the second and the third contact needle of the current collector are arranged in such a way that they form an equilateral triangle.

5. The system according to claim 1, wherein a diameter of the circle on which the first contact needle, the second contact needle and the third contact needle are arranged is less than or equal to the sum of a width of one of the first conductor tracks and a width of one of the second conductor tracks and a width of an insulation gap between them.

6. The system according to claim 1, wherein the contact needles of the current collector are arranged in such a way that, when the current collector is attached to the current-carrying wall member, at least a first of the contact needles is brought into contact with one of the first conductor tracks and a second contact needle is brought into contact with one of the second conductor tracks, independently of a rotation of the current collector on the current-carrying wall member.

7. The system according to claim 1, wherein the contact needles being arranged on a circle are arranged such that the first contact needle lies in a first third of the circle, the second contact needle lies in a second third of the circle, and the third contact needle lies in a third third of the circle.

8. The system according to claim 1, wherein the current collector further comprises a fourth, a fifth and a sixth contact needle and the first to sixth contact needles are arranged as a hexagon.

9. The system according to claim 1, wherein the current collector and the contact needles are arranged such that, when the current collector is attached to the wall member, at least two contact needles contact one or more of the first electrical tracks and at least two of the contact needles contact one or more of the second electrical tracks.

10. The system according to claim 1, wherein the contact needles are arranged such that a distance between the first contact needle and a straight line through the second contact needle and the third contact needle is greater than a width of one of the electrical conductor tracks.

11. The system according to claim 1, wherein the current collector comprises a fourth contact needle and the fourth contact needle is arranged within the circle on which the first, second and third contact needles are arranged.

12. The system according to claim 11, wherein the fourth contact needle is spaced apart decentered from a center of the circle.

13. The system according to claim 1, further comprising a rectifier adapted to provide an output voltage of defined polarity based on an input voltage applied to at least two of the contact needles.

14. The system according to claim 13, wherein the rectifier comprises at least three inputs and two outputs, each of the at least three inputs being connected to a corresponding contact needle.

15. The system according to claim 1, wherein the current collector is adapted such that the contact needles are movable between a contact position in which the contact needles contact the conductor tracks and a non-contact position in which the contact needles are separated from the conductor tracks when the current collector is attached to on the current-carrying wall member.

16. The system according to claim 1, wherein the current collector is adapted such that, when the current collector is aligned horizontally or vertically, a straight line through the first and second contact needles intersects a horizontal or vertical axis of the current collector at an acute angle.

17. The system according to claim 16, wherein the straight line through the first and second contact needles intersects the horizontal or vertical axis of the current collector at an angle of at least one of (a) not more than 30°, (b) not more than 15°, or (c) not more than 5°.

18. The system according to claim 16, wherein the straight line through the first and second contact needles intersects the horizontal or vertical axis of the current collector at an angle between than 5° and 10°.

19. The system according to claim 1, further comprising an electrical device on which the current collector is arranged in such a way that a straight line through the first and second contact needles intersects a horizontal or vertical axis of the electrical device at an acute angle when the electrical consumer is oriented horizontally or vertically.

20. The system according to claim 19, wherein the straight line through the first and second contact needles intersects a horizontal or vertical axis of the electrical device at an angle of at least one of (a) not more than 30°, (b) not more than 15°, or (c) not more than 5°, when the electrical consumer is oriented horizontally or vertically.

21. The system according to claim 19, wherein the straight line through the first and second contact needles intersects a horizontal or vertical axis of the electrical device at an angle between 5° and 10°, when the electrical consumer is oriented horizontally or vertically.

22. The system according to claim 1, wherein at least one of the contact needles is adapted such that a tip of the contact needle has an angle of at least one of (a) between 60° and 20°, (b) between 45° and 25°, or (c) of 30°.

23. The system according to claim 1, wherein the wall member and the current collector are adapted such that the current collector can he magnetically attached to the wall member.

24. A current collector for an electrical device in a system according to claim 1, the system being in particular a system for a presentation, sales or exhibition stand and/or for store fitting, the system comprising a current-carrying wall member; wherein the wall member comprises a carrier plate and a cover that covers the carrier plate; wherein the wall member comprises first electrical conductor tracks of a first polarity and second electrical conductor tracks of a second polarity, wherein the first and second electrical conductor tracks are arranged alternately at least in sections; wherein the current collector is a current collector for an electrical device adapted to be mounted on the wall member; the current collector having a plurality of at least three contact needles, wherein the current collector is adapted to be attached to the wall member such that at least one of the contact needles contacts one of the first electrical conductor tracks and at least one other of the contact needles contacts one of the second electrical conductor tracks; and wherein a first contact needle, a second contact needle, and a third contact needle of said plurality of contact needles are arranged on a circle:

25. (canceled)

26. A method for a presentation, sales or exhibition stand and/or for store fitting, the method comprising the steps: providing a current-carrying wall member; providing a current collector for an electrical device, which is configured to be mounted to the wall member; wherein the wall member comprises a carrier plate and a cover that covers the cover plate; wherein the wall member comprises first electrical conductor tracks of a first polarity and second electrical conductor tracks of a second polarity, wherein the first and second electrical conductor tracks are arranged alternately at least in sections; wherein the current collector has a plurality of at least three contact needles, wherein the current collector is adapted to be attached to the wall member such that at least one of the contact needles contacts one of the first electrical conductor tracks and at least one other of the contact needles contacts one of the second electrical conductor tracks; and wherein a first contact needle, a second contact needle, and a third contact needle of said plurality of contact needles are arranged on a circle; and attaching the current collector to the current-carrying wall member such that a first of the contact needles contacts one of the first electrical conductor tracks and at least one other of the contact needles contacts one of the second electrical conductor tracks.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Exemplary embodiments of the present disclosure are illustrated in the drawings and will be explained in more detail in the following description.

[0054] FIG. 1 shows an exemplary presentation stand with a system according to an embodiment of the present disclosure with several wall members;

[0055] FIG. 2 shows a schematic illustration of a wall member without cover;

[0056] FIG. 3 shows a schematic illustration of a wall member with cover;

[0057] FIG. 4 shows a side view of a current collector attached to a wall member;

[0058] FIG. 5 shows an enlarged view of the current collector of FIG. 4;

[0059] FIG. 6 shows a first exemplary illustration of an arrangement of contact needles on a current collector;

[0060] FIG. 7 shows a second exemplary illustration of an arrangement of contact needles on a current collector;

[0061] FIG. 8 shows a third exemplary illustration of an arrangement of contact needles on a current collector;

[0062] FIG. 9 shows a fourth exemplary illustration of an arrangement of contact needles on a current collector;

[0063] FIG. 10 shows an illustration of arrangements of contact needles on a current-carrying member in different positions and rotations

[0064] FIG. 11 shows a further illustration of different arrangements of contact needles on a current-carrying wall member in different positions and rotations

[0065] FIG. 12 shows an arrangement of three contact needles in combination with a rectifier;

[0066] FIG. 13 shows an arrangement of four contact needles in combination with a rectifier;

[0067] FIGS. 14A to C show a top view as well as first and second side views of a current collector for an electrical device;

[0068] FIG. 15 shows a perspective view of an exemplary current collector;

[0069] FIG. 16 shows a perspective view of an exemplary current collector with a magnetic holder;

[0070] FIG. 17 shows a flowchart of a method

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0071] FIG. 1 shows an exemplary presentation stand 100 or a shop window construction with a system according to an embodiment of the present disclosure. The presentation stand 100 comprises a plurality of wall members 10. Various objects 5 can be attached to the wall members 10. For this purpose, various fasteners known from store fitting or trade fair construction can be used. In a preferred embodiment, the objects can be magnetically attached to the wall members 10. An advantage of this solution is that the objects 5 can be positioned freely on the wall members 10. It shall also be understood that corresponding floor or ceiling elements can be provided, which are also referred to as wall members in the context of the present disclosure for the sake of simplicity. The objects may be electrical devices 5, such as a light source, lighting equipment, a screen, a motor, a loudspeaker, a mannequin or the like. For the power supply, current collectors are provided which are electrically connected to the electrical consumers 5 or can be configured as part of the objects or electrical devices.

[0072] With the proposed wall member 10 and the associated current collector 20, presentation, sales or exhibition stands 100, especially in modern showrooms, can be easily modified and, in particular, easily adapted to local conditions, thus providing a high degree of flexibility with regard to the design freedom of the presentation, sales or exhibition stand 100. Such wall members 10 can also be used in store fitting. Furthermore, the system can advantageously also be used in museums or in the smart home sector.

[0073] Compared to conventional exhibition stands, there is no need for complex wiring of electrical devices, which not only simplifies assembly and disassembly considerably, but also allows the electrical consumers to be positioned almost freely and variably. For the construction of the presentation, sales or exhibition stand 100, several wall members 10 are typically assembled.

[0074] A peculiarity of the proposed system is that the current collectors 10 or the electrical consumers 5 can not only be flexibly positioned on the wall members 1 with regard to their horizontal and vertical position, but that rotation can also be enabled. For this purpose, the proposed system comprises at least one current-carrying wall member 10 and a current collector 20 for an electrical device 5. An embodiment of a current-carrying wall member 10 is shown in FIGS. 2 and 3. Exemplary embodiments of current collectors are shown in FIG. 4 ff.

[0075] FIG. 2 shows a schematic illustration of a wall member 10 without cover. The wall member 10 comprises first electrical conductor tracks 11 of a first polarity and second electrical conductor tracks 12 of a second polarity. The first and second electrical conductors 11, 12 are arranged alternately at least in sections. The first electrical conductors 11 can form a first comb-like structure. The second electrical conductors 12 can form a second, corresponding comb-like structure, whereby the first comb-like structure and the second comb-like structure are formed such that the comb-like structures engage in one another. An insulation gap is provided between the first and second electrical conductors 11, 12. The insulation gap ensures that no short circuit occurs. Preferably, the width of the insulation gap should be as small as possible, for example less than 2 mm, in particular less than 1.5 mm, in particular less than 1.0 mm, in particular less than 0.5 mm, in particular less than 0.2 mm. The width of the isolation gap can be smaller than 1/10, especially smaller than 1/20 of a conductor track width. This can reduce the probability of one of the contact needles falling into the isolation gap. However, the insulation gap can be larger than a width of a tip of a contact needle of a current collector to avoid a short circuit between the conductive electrical tracks of the first polarity 11 and the conductive electrical tracks of the second polarity 12. The conductor tracks 11 of the first polarity are adapted to be connected to a first output of a voltage source, e.g. a positive pole 13. The conductor tracks 12 of the second polarity are adapted to be connected to a second output of a voltage source, for example a negative pole 14. Instead of a DC voltage, the conductor tracks 11, 12 can also be supplied with an AC voltage or a combination of DC and AC voltage. An area of the current-carrying wall member can be covered by at least 70%, in particular by at least 85%, in particular by at least 90% or 95% with the first and second conductor tracks. The conductor tracks 11, 12 can be part of a carrier element 15 of the wall member 10 or alternatively be applied on the carrier element 15.

[0076] FIG. 3 shows a schematic illustration of a wall member 10, which comprises an optional cover 18. For example, the cover 18 can cover the electrical conductor tracks 11, 12 applied to the carrier plate 15. Alternatively, the conductor tracks 11, 12 can be part of the cover. In this case, the conductor tracks may have the same or similar geometry as the conductor tracks described above and shown in FIG. 2. To attach the cover 18 to the wall member 10, a piping rail 17 (or a piping profile) can be provided at the edge, into which e.g. a piping strip on the cover side can be inserted. The piping rail can be made of silicone or aluminum, for example.

[0077] FIG. 4 shows a side view of a system comprising a wall member 10 and a current collector 20 attached to the wall member 10. FIG. 5 shows an enlarged view of the current collector 20 from FIG. 4 on the wall member 10. The wall member 10 comprises a carrier plate 15 and optionally a cover 18 covering it. The wall member 10 also comprises first electrical conductor tracks 11 of a first polarity and second electrical conductor tracks 12 of a second polarity, the first and second electrical conductor tracks 11, 12 being arranged alternately at least in sections.

[0078] The current collector 20 comprises a plurality of at least three contact needles 21a, 21b, 21c. The current collector 20 is adapted to be mounted on the wall member 10 such that at least one of the contact needles 21a contacts one of the first electrical conductor tracks 11 and at least one other of the contact needles 21b contacts one of the second electrical conductor tracks 12. Here, a first contact needle 21a, a second contact needle 21b, and a third contact needle 21c of the plurality of contact needles can be arranged such that they are arranged on a circle, as explained in more detail with reference to FIG. 6 ff. below.

[0079] To attach or mount the current collector20 to the wall member 10, the wall member 10 and the current collector 20 can be adapted such that the current collector can be magnetically attached to the wall member. For example, the current collector 20 may comprise one or more magnets 32 as shown in FIGS. 4 and 5. The electrical conductor tracks 11, 12 and/or the carrier plate may comprise a magnetic material so that the current collector can adhere to it.

[0080] The contact needles 21a-c of the current collector can be connected to a rectifier 22. The rectifier can be part of the current collector or part of an electrical device 5 that can be connected to the current collector. The rectifier 22 is adapted to provide an output voltage of defined polarity based on an input voltage applied to at least two of the contact needles 21a-c. Output pins 24a, 24b can be provided for this purpose, to which an electrical device 5 can be connected. The rectifier may comprise at least three inputs 23a-c and two outputs 24a,b, each of the at least three inputs 23a-c being connected or connectable to a respective contact needle 21a-c. Exemplary embodiments of such rectifiers in the form of bridge rectifiers are shown in FIGS. 12 and 13. Optionally, the rectifier 22, the current collector 20 and the electrical device 5 can form a unit 6. Optionally, the current collector 20 and the rectifier 22 can be part of the electrical device 5.

[0081] It shall be understood that the current collector or contact needles can optionally comprise a contact spring 26 for the contact needles, as shown in FIG. 5, so as to provide a defined contact pressure.

[0082] FIGS. 6 to 9 show exemplary illustrations of arrangements of contact needles 21a-f on a current collector 20. The current collectors 20 comprise a plurality of at least three contact needles 21a-21f respectively, where a first contact needle 21a, a second contact needle 21b, and a third contact needle 21c of the plurality of contact needles 21a-21f are arranged such that they lie on a circle 41. The circle 41 is shown in dotted auxiliary lines, as this is only serves to describe the type of arrangement.

[0083] In the example shown in FIG. 6, the current collector 20 comprises three contact needles 21a-c, wherein the first, the second and the third contact needle 21a-21c of the current collector 20 are arranged such that they form a triangle 42, in particular an acute-angled triangle, in particular an isosceles triangle, and in particular an equilateral triangle.

[0084] FIG. 10 shows an illustration of the current collector shown in FIG. 6 or respectively its contact needle arrangement in different positions and rotations A to F. In the background, the first electrical conductor tracks 11 and second electrical conductor tracks 12 of the wall member 10 are shown. The current collector 20 (more precisely its contact needle arrangement) is adapted to be attached to the wall member such that at least one of the contact needles 21a contacts one of the first electrical conductors 11 and at least one other of the contact needles 21b, 21c contacts one of the second electrical conductors 12. As can be seen from FIG. 10, even in a plurality of different rotation states, at least one of the contact needles can always be in contact with one of the first electrical conductor tracks 11, here the positive pole, and at least one of the contact needles can be in contact with one of the second electrical conductor tracks 12, here the negative pole. This applies even if, as shown in position C, one of the contact needles 21c lies in an insulation gap 19 between the tracks 11, 12.

[0085] Hereby, a diameter of the circle 41 (see FIG. 6), on which the first contact needle, the second contact needle and the third contact needle are arranged, can be smaller than or equal to the sum of a width 51 of one of the first conductor tracks 11 and a width 52 of one of the second conductor tracks 12 and optionally a width 53 of the insulation gap 19 between them. As shown in FIG. 10 at position E, two contact needles 21b, 21c can also lie on different conductor tracks 12 of the same polarity, whereby a third of the contact needles 21a lies on a conductor track 11 of the other polarity. Optionally, the contact needles 21a-c can be arranged such that a distance between the first contact needle 21a and a straight line through the second contact needle 21b and the third contact needle 21c is greater than a width 51, 52 of one of the electrical tracks 11, 12.

[0086] The following table shows exemplary combinations of conductive track widths and circle diameters 41, assuming an insulation gap with a width of 1 mm and a contact area of 0.5 mm. The first and second conductive tracks 11, 12 can have the same track width.

TABLE-US-00001 Electrical conductor Circle diameter d track width in mm in mm 9 16-17 10 17-19 11 18-21 14 22-27 15 24-29 19 29-37 20 30-39

[0087] FIG. 11 shows another illustration of different arrangements of contact needles on a current-carrying wall member in different positions and rotations. However, in a particularly unfavorable case, as shown in FIG. 11 position E, for example, the second contact needle 21b and the third contact needle 21c can fall into the insulation gap 19 between the tracks 11, 12. In this special case, a power supply would not be possible without any further action. A first possible solution is to combine a first and a second current collector with different rotational orientations of the contact needles 21a-21c, for example with the orientations shown in FIG. 11 position A and position B. However, this would require a not negligible amount of material.

[0088] FIG. 11 positions G to J show further exemplary remedies. As shown in FIGS. 8 and 9 and FIG. 11 position G, the current collector 10 can optionally be provided with a fourth contact needle 21d. The fourth or further contact needle 21d can be arranged within the circle 41, on which the first, second and third contact needle 21a-c are located. It shall be understood that such a further contact needle inside the circle can also be provided in combination with further contact needles, as for example shown in FIG. 7. Thereby the flexibility regarding free positioning and rotation of the current collector relative to the wall member can be further improved. In the examples shown in FIG. 9 and FIG. 11 G, the fourth contact needle can be arranged in a center of circle 41 and/or in a center of gravity of triangle 42 (these points coincide for an equilateral triangle).

[0089] Optionally, the fourth contact needle 21d can be arranged spaced apart decentered from a center of the circle 41, as shown in FIG. 8. This has the advantage of reducing the probability that, for example, the contact needles 21a and 21d will lie in a straight line 43, which is parallel to a horizontal or vertical axis of the current collector 20. The inventors recognized that the current collectors 20 are often aligned horizontally or vertically. Against this background, it can be advantageous to arrange the positioning of the contact needles turned with respect to a horizontal or vertical axis of the current collector 20, as shown in FIG. 9 and FIG. 11 position H. This can also provide the advantage of reducing the probability that, for example, contact needles 21a and 21d are located on a straight line 43 parallel to a horizontal or vertical axis of the current collector 20. The use of a fourth contact needle 21d is optional. In particular, exactly three contact needles can be provided in this case, so that the costs and the manufacturing effort can be further reduced.

[0090] In a further exemplary embodiment the current collector 20 may also comprise a fourth contact needle 21d, a fifth contact needle 21e and a sixth contact needle 21f. The six contact needles 21a-f can be arranged as a hexagon, especially as an equilateral hexagon or star. As shown in the examples in FIG. 11 position I and J, in this case, even if two contact needles 21a and 21d, as shown in FIG. 11 position I, or 21b and 21d, as shown in FIG. 11 position J, fall into the insulation gap 19, an electrical connection can still be established with one of the first electrical conductor tracks 11 and one of the second electrical conductor tracks 12. Another advantage of this embodiment can be that when the current collector 20 is attached to the wall member 10, at least two contact needles 21e, 21f contact one or more of the first electrical conductor tracks 11 and at least two of the contact needles 21b, 21c contact one or more of the second electrical conductor tracks 12. This may allow higher current flows and thus higher power of an electrical device 5 connected to the current collector 20.

[0091] FIG. 12 shows an illustration of a current collector 20 with an arrangement of three contact needles 21a-21c in connection with a rectifier 22. FIG. 13 shows a corresponding representation of a current collector 20 with an arrangement of four contact needles 21a-21d in connection with a rectifier 22. In the shown examples, a diode bridge rectifier is shown, but other types of rectifiers can be used. An advantage of this solution is a simple, low-cost design, which is also easily scalable for a larger number of contact needles 21a-f. An output voltage of defined polarity is provided at outputs 24a, 24b, which can be fed to an electrical load 5.

[0092] FIG. 14 A to C show a top view (C), as well as a first and a second side view (A, B) of a specific exemplary embodiment of a current collector 20 for an electrical device. FIG. 15 shows a perspective view of this current collector 20. Such a current collector can also be called a needle connector. Here the contact needles 21a-21d can be arranged on a lower side or first side of the housing and the current interfaces 24a, 24b can be arranged on an upper side or second (opposite) side of the housing. For example, the rectifier circuit 20 shown in FIG. 13 may be integrated into the current collector 20. Hence a compact component can be provided that can be handles easily.

[0093] In the shown example, the current collector comprises four contact needles, which may for example be arranged similar to the illustration shown in FIG. 9. However, other arrangements or numbers of contact needles may be provided. In particular, the current collector 20 may be adapted such that, with horizontal or vertical alignment of the current collector, a straight line through the first and second contact needles 21a, 21b intersects a horizontal or vertical axis of the current collector at an acute angle, in particular at an angle not exceeding 30°, in particular at an angle not exceeding 15°, in particular at an angle not exceeding 5°.

[0094] FIG. 16 shows a perspective view of a current collector 20 with a magnet holder 30. The magnet holder 30 may comprise one or more magnets 32 adapted to attach the magnet holder 30 and thus the current collector 20 to a wall member 10 as shown in FIG. 1. The magnet holder can have a receptacle 33 for the current collector 20, here in the form of a groove 33 provided on the magnet holder, which interacts with a corresponding tongue 27 of the current collector 20.

[0095] Optionally, the current collector 20 (especially in combination with the holder 30) can be adapted such that the contact needles 21a-d can be moved between a contact position, in which the contact needles can contact the electrical conductor tracks of the wall member, and a non-contact position, in which the contact needles are at a distance from the conductor tracks, when the current collector is placed on the current-carrying wall member. For this purpose, the current collector 20 may comprise a spring element 28, for example as shown in FIG. 14B and FIG. 15. The magnetic holder 30 may optionally further comprise a slot 33 for an electrical device. In this case, the electrical device can be adapted to contact the output pins or output contacts 24a, 24b for power supply in an inserted position. Optionally, the current collector 20 in combination with the holder 30 can be adapted to be moved from the non-contact position to the contact position by inserting an electrical device into the plug-in unit or groove 33.

[0096] FIG. 17 shows a flow chart of a method 200, in particular for a presentation, sales or exhibition stand (100) and/or for store fitting. In a first step S201, a current-carrying wall member as described in the present disclosure is provided. In a second step S202, a current collector as described in the context of the present disclosure is provided. In a third step S203, the current collector is attached to the current-carrying wall member in such a way that a first of the contact needles contacts one of the first electrical conductor tracks and at least one other of the contact needles contacts one of the second electrical conductor tracks.

[0097] In an optional fourth step S204, a check of the position and rotation of the current collector (or of an electrical device comprising the current collector or connected to the current collector) can be performed. In an optional fifth step S205 a correction of the position and/or rotation of the current collector can be made. Steps S204 and S205 can optionally be repeated iteratively until a desired position and rotational alignment is reached. This can further improve the flexibility in the placement or design of such a presentation system. In particular, it is not necessary to define a position and angular alignment of the electrical consumers in advance, as they can be flexibly adjusted.

[0098] It shall be understood that the embodiments described herein as examples can also be used in modified form, for example with a different number of contact needles, different dimensions, different distances between contact needles and surfaces and/or modifications of the geometric arrangement, within the scope of the attached claims respectively.

[0099] It shall be understood that the shown strictly vertical or horizontal arrangement of the electrical conductor tracks, as shown in FIG. 2, is to be understood as an example, so that they can also be provided thinner, thicker, diagonally or in some other way such as e.g. circular or meandering on the carrier element 15. For the operation of the electrical device 5 the current collector can interact with the electrical conductor tracks arranged on the carrier element in such a way that at least a first contact needle can come into electrical contact with one of the first conductor tracks and a second contact needle with one of the second conductor tracks. For the power supply, in particular low-voltage systems can be used, which work with 12/24 V and can therefore be used without danger. However, by using special insulators which are applied as varnish, foil and/or other materials, it is also conceivable to use higher-voltage systems, i.e. systems operating at higher voltage, if necessary. Thanks to the e.g. needle-like design of the contacting needles, they can be moved frequently without damaging the cover. In general, the conductors 11, 12 usually carry low voltage, for example 12 or 24 V, so that the risk of injury when handling the proposed wall member 10 or the current collector 20 or an electrical device 5 connected to it can be almost completely excluded. The application of the conductor tracks 11, 12 on the carrier plate 15 can be done for example by spraying, gluing or welding. In particular, conductive lacquers can also be used for the conductor paths 11, 12 which are sprayed/printed (e.g. by screen printing) onto the carrier plate 15.

[0100] It is also possible that the wall members 10 may not only be made flat, but can also be curved or arched. Modern magnets 6 enable magnetic forces of considerably more than 80 kg, so that even large electrical devices 5 or electrical devices 5 arranged in special presentation elements, such as shelves 11 (see FIG. 1), can be easily mounted to the respective wall members 10.

[0101] The wall member 10 can also be designed flexibly, in particular it can be rolled up or down, so that it can for example be used as wallpaper or floor covering. The wall member 10 can be constructed as a sandwich material, which comprises the current-carrying conductors 11, 12 and can be used or mounted as wallpaper/carpet (rolled material) or panel material.

[0102] The sandwich construction can be done as follows: The cover 18 (surface material) is configured as a thin, penetrable, flexible material, behind this the conductor tracks 11, 12 are arranged on an insulating material, behind this there is the carrier material 15 made of plastic and/or of magnetic or magnetizable material, such as steel.

[0103] The current collector 20 and/or the electrical consumer 5 can also be intelligent or programmable. Data can be transmitted by modulating a signal on one or both of the electrical conductor tracks 11, 12 by means of so-called power line communication (PLC) or by wireless communication or optically. For example, different current collectors 20 and/or electrical devices 5 can be selectively controlled. For example, switching/dimming/controlling of individual devices 5 is possible. Furthermore, a bus system can also be provided in which the electrical conductors 11, 12, the current collectors 20 and/or the electrical devices 5 represent a part of the bus system and with which individual devices 5 can be individually addressed/controlled.

[0104] Optionally, a wall member can also be adapted to be applied under a wall covering, such as fiberglass wallpaper, and used for example in the field of smart home or in a museum. The current collectors can be used to supply electrical devices, such as lighting equipment for pictures or other exhibits or monitors explaining the exhibits, with electrical energy.

[0105] Likewise, the proposed system can be used in an office or a private home, where it can then be placed for example under a surface of textile, foil or wood veneer or other wall surface materials. By means of the current collectors it is possible to flexibly supply electrical devices at different positions and especially at different angles of rotation with electrical energy, without having to provide a multitude of possibly ugly power outlets. In particular when using a low-voltage system, the safety for children or other persons can be improved while at the same time providing increased flexibility.