EP1866897B1 - Light box - Google Patents

Abstract

A light box with at least three base profiles which in the assembled state form a closed base frame onto which a first tensible plane material to be illuminated can be fitted such that it forms the front side of the base frame, at least one illuminant which is disposed within the base frame in order to illuminate the light box, at least one power supply, in particular an electrical series connection unit in order to supply the illuminant with current, at least one supporting wall disposed on the rear side of the base frame which has at least one attachment for releasably fixing the illuminant and/or the electrical series connection unit within the base frame, the supporting wall being formed by a second tensible plane material which can be attached to the base frame such that it forms the rear side of the light box.

Description

The present invention relates to a light box with at least three basic profiles, which form a closed base frame in the assembled state, to which a first to be illuminated tensionable sheet material is used so that it forms the front of the base frame. The light box has at least one light-emitting means, which is arranged within the base frame to illuminate the light box, and at least one power supply, in particular an electronic ballast, to supply the light source with electricity, and at least one arranged on the back of the base frame support wall, the Has at least one fastening means for releasably fixing the lamp and / or the electronic ballast within the base frame.

Light boxes of the type mentioned are well known and are described for example in the G 9002394 U1. This document discloses a lightbox for use in illuminated advertising comprising a base frame having at least one interchangeable rigid advertising disc. The base frame is formed from profiled strips, the positive and / or non-locking interlocking locking means for attachment to each other. The change of the advertising motif is done by changing the advertising disc, which is inserted between a likewise rigid frame and the base profile. For this purpose, the frame is first released by applying forces from the base frame, then removed the old rigid media disc and replaced by a new also rigid advertising disc and finally the frame fixed by the latch again on the base frame.

A disadvantage of this system is, on the one hand, that the geometric dimensions are already established during the production of the base frame and can not be changed at a later time. On the other hand, these light boxes are shipped almost exclusively in the assembled state, which makes handling difficult and with high packaging and shipping costs. Even a shipment in the disassembled state, the handling can not be significantly easier, especially since only the weight to be supported can be reduced, but not the resulting through the rigid back wall or through the advertising disk bulkiness due to the dimensions of the latter.

The transport to possibly changing locations is very expensive with dimensions of for example 5m x 3m. If, for example, the light box is used as illuminated advertising medium in large department stores and is to be used in different departments on different floors of the department store due to seasonal use, it may be necessary to transport the light box via a staircase or an escalator or an elevator. The rigid format of the previously known light boxes is very disadvantageous and limited so the dimensions of the light box on the local conditions such as clear height in the escalators.

To solve the problem of transport and packaging and shipping costs, the Applicant has been offering for some time unlit, modular variable advertising media consisting of four basic profiles that are composable to form a closed base frame in the assembled state, in the the advertising medium is used. Basic profiles and advertising media can be shipped or transported disassembled so that a rebuild is very easy even within different floors of a department store. By exchanging two basic profiles, the basic frame can also be easily adapted to a possibly changed format of the advertising medium. As a result, billboards with formats up to 3m x 10m can be realized.

For light boxes, however, such a simple change of the format of the base frame in the prior art is not possible. Also, the transport can not be so easily realized in this way, since in the light boxes on the back usually a support wall is formed in order to fasten lighting necessary for lighting and power supply necessary electronic ballasts can. This support wall thus provides the minimum dimensions limiting part of the transportable modular In addition, an exchange of the back panel is necessary to change the format of the illuminated to be illuminated tension material required, otherwise only parts of the light box would be equipped with bulbs and so a homogeneous illumination of the tensionable sheet material could not be guaran teed. The installation of known in the prior art bulbs also meets the general safety criteria also insufficient, so that an assembly and disassembly can be performed only by specialist electricians.

The document GB-A-2 301 694 discloses a light box or a support edge arrangement according to the preamble of claims 1 and 12, respectively.

It is therefore an object of the present invention to provide a light box, which can be mounted and dismounted in a simple manner and at the same time provides the greatest possible flexibility during transport due to the smallest possible space requirement.

This object is achieved in that the support wall is formed by a second tensionable sheet material which is fixed to the base frame, that it forms the back of the light box.

In other words, the attachment of the lighting means and / or the electrical ballast is carried on a fixed to the base frame flexible tensionable surface material, on which fastening means for releasably fixing the lamp and / or the electrical ballast are provided within the base frame and that can be simply rolled up or folded for transport after disassembly of the light box. In this case, the tensionable sheet material may be designed as one or more parts and, for example, be composed of two or more individual tensionable surface materials.

If the format of the light box is changed, then simply another adapted to the new dimensions tensionable sheet material can be used in the modified base frame. Thus, for example, the erector of such a light box simply order the corresponding flexible back wall at the manufacturer if necessary, together with the new motif to be illuminated and sent by standard package or parcel through the post. It is no longer necessary to build a completely new lightbox for another format. Instead, the change in format is achieved by exchanging two profiles and the two stretchable sheet materials. This achieves an almost limitless scalability of the light boxes adapted to the motifs to be illuminated. This results in a significant cost savings.

In order to continue to ensure a homogeneous illumination, further bulbs are releasably secured to the likewise elongated tensionable surface material, for example, when extending the base frame.

If an advertising medium with a smaller format is to be clamped into the light box at a later time, the longitudinal profiles are replaced by shorter longitudinal profiles and light sources which are no longer required are removed in accordance with the shortening and the tensionable sheet material correspondingly shortened or replaced by a smaller one.

Since the lights can have different lengths, for example, 580 mm, 880 mm, 1180 mm and 1480 mm, both the height and the length of the base frame can be adapted to the format of the advertising medium to be used without much design effort.

In order to achieve such scalability, it is expedient to align the lamps perpendicular to the mounting rail. Of course, the bulbs can also be arranged parallel to the extension of the stretchable sheet material, depending on how best to realize the optimal illumination of the light box.

The detachable connection of the illuminant to the tensionable sheet material can be realized by a snap connection and / or a snap connection and / or a connection and / or a connection by means of a hook-and-loop fastener or another fastening variant known in the art of Tehcnik.

A particularly easy and quick disassembly is achieved by the connection by means of a Velcro fastener. For this purpose, Velcro strips can be provided on the lighting means, which form a hook-and-loop fastener with hook-and-loop strips arranged on the particular length-adjustable sheet material. The tensionable sheet material may also be formed by a Velcro strip. This allows a particularly quick and easy installation of the light box even in hard to reach places, which can be made due to the simple handling thus obtained by a single person.

In order to meet the prescribed safety requirements, it may be expedient that the lighting means can be fixed in position by means of a safety device, in particular a securing loop, against unintentional release from the fastening rail. This prevents that the stretchable surface material is damaged by a possible loosening of a bulb.

In a further embodiment, the bulbs are connected in series via a pre-assembled plug-in system. In this way, up to forty bulbs can be connected in series (this corresponds to about 1000 W depending on the type of light), which allows a scaling of the base frame up to a size of 3m x 10 m, without the need for another power supply in the light box must become.

The wiring can be done by prefabricated cable with different lengths to which luminous plugs are mounted, so that a connection from bulb to bulb by simply plugging the lamp plug takes place, If the number of bulbs are increased, it is only necessary a corresponding cable in the connect the last lamps in the series connection and connect them to other lamps. In this way, up to forty bulbs can be connected in series to a power connection. Due to the different lengths of the cable, it is also possible to fix the lamps according to the desired use and the intensity of the illumination with different distances from each other on the mounting rail.

For reasons of safety, when using light boxes with textile coverings, it must be ensured that passers-by or customers can not come to live parts at any time, or that somebody injures themselves by falling into the light box if, for example, a light source breaks down. For this purpose, in one exemplary embodiment, the light sources in the light box are surrounded by a sheath, so that, in the event of a breakage of the light source, the components that are at risk of injury, such as, for example, broken glass, remain in the sheath.

In order to positively influence the life of the stretchable sheet material used in the base frame, in one embodiment of the present invention, the lighting means may be provided with a UV filter. This can already be integrated in the casing.

A particularly simple way of fastening the tensionable surface materials to the base profile is achieved in that the surface material has tensioning means by means of which it can be inserted into the base profile. The tensioning means can be, for example, tentering frames to be mounted on the base profile or else also stretchable reinforcing strips formed on the edge region of the tensionable sheet material, e.g. made of silicone, which can be used in grooves formed in the base profile. This type of fastening is already known, for example, from the fabric-frame system sold by the applicant. In this system, the basic profiles are provided on their front and / or back with a continuous groove into which the stretchable sheet material is easily inserted. By inserting the tensionable sheet material is automatically stretched.

Are provided both at the front and back corresponding grooves in the basic profiles, so a two-sided attachment of stretchable sheet material to the light box is possible, so that the light box can be suspended from a ceiling and the subject on the Surface material or the surface material itself visible from different positions and the lightbox can be equipped from two sides.

Alternatively, on one side of the second flexible stretchable material, the edge region for attachment to the base frame can be turned over in such a way that a loop forms on the edge region of the surface material. This loop can then be pulled to attach the tensionable sheet material to the base frame or the light box via a cross strut, more or less like a curtain rod, and the cross strut can then be fastened to the base frame. Of course, the cross member may also be permanently attached to the base frame and be pivotable, for example via a joint in a position in which a simple mounting of the support wall to the cross member is possible. The tension of the support wall is caused in this case by a kind of self-tension either by its own weight and can also be supported and reinforced by attachable in the opposite edge or edge region of the support wall additional weights.

Another possibility of attaching the support wall to the light box or the base profile is provided, for example, by at least two hooks formed on the corner region of the base frame, on which recesses which are reinforced in the support wall can be pushed. In another Embodiment is at least in the upper region of the base frame in particular over the entire longitudinal side extending a Velcro strip formed on at least one of the longitudinal sides of the base frame, which is complementary to at least one Velcro strip on the support wall, so that attachment of the support wall by simply pressing the two Velcro strips done can. Of course, the Velcro strip may also at least partially extend over the side surfaces of the base frame or else be formed so that the support wall almost completely closes the interior of the light box via a circumferential on the base frame Velcro strips against the environment.

Also in the latter two fastening principles, the tension of the supporting wall either by their own weight or / and is supported and reinforced by attachable in the opposite edge or edge area additional weights.

Of course, it is possible to attach the supporting wall by other similar fastening types such as snap or snap connections or form-locking connection types to the base frame or the light box, without going beyond the contents of this application.

For fixing the fastening means for the lamps and / or the electronic ballasts to the second tensionable surface material or the support wall can be formed in one embodiment recesses in the second tensionable sheet material, into which pins are inserted, which are formed on the fastening means and can be fixed in position by pushing counter-locking means outside the space to be illuminated. Another alternative way of securing the fastening means to the tensionable sheet material may be made possible, for example, by gluing, riveting, push-button connections, hook-and-loop fasteners and other types of fastening known in the art.

In order to improve the scalability of the light box and, in order to provide a particularly simple way of assembly, the use of appropriate skilled personnel, such as. makes an exhibition builder or electrician dispensable, is provided in one embodiment that the bulbs are connected via a pre-assembled connector system in series with each other, all flow-leading parts are not accessible to the fitter. In particular, two light sources can be operated in such a plug-in system via in each case one electronic ballast.

In a further exemplary embodiment of the present invention, at least one support strut can be inserted into the base frame in such a way that it supports the base frame and / or the second tensionable surface material, in particular in the region reinforced and stabilized the fastener. This support strut can be arranged outside the space to be illuminated, which is formed by the two tensionable surface materials and the base frame, so as not to adversely affect the space to be illuminated by a possible shadow.

In the support strut may be provided to the recesses in the second tensionable sheet complementary shaped recesses to durchzustecken the fastener both by the tensionable sheet material and by the support strut before being fixed with locking means in position. In this case, both the recesses in the Stützsterbe and the recesses in the sheet material can be further reinforced by additional eyelets and secured against tearing.

In order to simplify the assembly for the end user, in a further exemplary embodiment of the present invention, the electronic ballasts necessary for the power supply can already be preassembled on the second tensionable surface material forming the supporting wall. Furthermore, the fixing points necessary for fixing the fastening means can already be in the second tensionable sheet material, for example in the form of recesses or in the form of marks or adhesive dots, which z. B. released by peeling off a protective film, the adhesive surface for fixing the fastener is, be given, so that used for fastening the fastening means and fixed by counter-locking means in position and then the lighting means are releasably inserted into the fastening means. Of course, it is also possible to pre-assemble the fastening means already completely on the second tensionable sheet material. Combinations of the possible types of fastening and pre-assembly states of ECG and fastening means are also conceivable. Although the pre-assembly of the bulbs is also possible, but with a corresponding transport, the risk of damage to the bulbs is relatively large.

A further embodiment of the present invention provides that the supporting wall almost completely reflects the light emitted by the luminous means, in order to achieve the highest possible yield of the light output emitted by the luminous means. Alternatively, the support wall can also be designed so that it converts the light emitted by the light source into a color effect on the back of the light box, so that this color effect is also outside the light box, for example, in the surrounding area of the light box a kind Ambi-light can be seen and Thus, if necessary, the effect of the light box for the viewer by the additional coloring intensified.

In a further embodiment, the first and / or second tensionable sheet material is a woven or knitted textile, in particular, which can be printed, for example, in daysublimation printing. The great advantage of such a substance lies on the one hand in its flexibility and foldability. It is also possible to send large formats in small envelopes. When using plastic tarpaulins as tensionable surface material, it is important to ensure that the tarpaulins are carefully rolled, as folds cause kinks, which then remain visible when the plastic tarpaulins are inserted into the base frame. This is not necessary when using a textile fabric because it can be selected wrinkle-free.

Another advantage of using fabric is that the material properties can be chosen so that no reflections are generated on the surface, thereby allowing trouble-free viewing of the subject without reflection from external light sources. The sound behavior of a light box is also positively influenced by the use of textiles as a printed advertising medium, since the fabric covering reflects less noise, especially in high frequencies, in contrast to glass panes, Plexiglas plates or tarpaulins less. If, on the other hand, priority is given to optimizing the production costs, preference may be given to the use of plastic tarpaulins or the like.

Figur 1

eine schematische perspektivische Darstellung eines erfindungsgemäßen Leuchtkastens;

Figur 2

eine schematische perspektivische Darstellung eines erfindungsgemäßen Leuchtkastens gemäß der Figur 1 von unten;

Figur 3

eine schematische perspektivische Teildarstel- lung eines erfindungsgemäßen Leuchtkastens ge- mäß der Figur 1 im Schnitt; und

Figur 4

eine schematische Darstellung eines erfindungs- gemäßen Leuchtkastens mit einem mehrteiligen flexiblen spannbaren Flächenmaterial.

With regard to further advantageous embodiments and modifications of the invention, reference is made to the dependent claims and the following description of an embodiment with reference to the accompanying drawings. Show it:

FIG. 1

a schematic perspective view of a light box according to the invention;

FIG. 2

a schematic perspective view of a light box according to the invention according to the FIG. 1 from underneath;

FIG. 3

a schematic perspective partial representation of a light box according to the invention according to the FIG. 1 on average; and

FIG. 4

a schematic representation of a light box according to the invention with a multi-part flexible tensionable sheet material.

The FIG. 1 shows a light box 1 with four basic profiles 2a, 2b, 2c, 2d, screwed together via Allen screws 2e such that they form a closed base frame 2. The basic profiles 2a, 2b, 2c, 2d are made of aluminum and therefore have a high stability compared to a relatively low weight.

At the front of the base frame 2, a circumferential groove 3 is formed, in which a first tensionable surface material 4 (FIG. FIG. 3 ) can be used with its in the edge region formed stretchable reinforcing strip 4a of a flexible material such as silicone. Within the base frame 2, five light sources 5 are fastened via fastening means 6 to a supporting wall made of a tensionable sheet material 7. The light-emitting means 5 are supplied with power via three electrical ballasts 8, which are likewise to be fixed by the fastening means 6 in the tensionable surface material 7. In each case, a ballast 8 supplies two lamps 5.

In the present embodiment, on the right side of the light box 1, the ballasts 8 and 5 bulbs are already brought into their predetermined position by the fastening means 6 and can by simply clipping into the fastener 6 - here in the form of mounting brackets - on the flexible sheet material 7 releasably fixed.

As becomes clear from the left-hand area of the light box 1, in this exemplary embodiment the fastening means 6 are already pre-mounted on the tensionable sheet material 7. Of course, it is also possible to pre-assemble the ballasts 8 and / or the lighting means 5 in order to further simplify the mounting of the light box 1 by non-specialists and to further reduce possible sources of error during assembly.

At the back of the light box 1 is also a reinforcing strut 9 (see FIG. 2 ) are provided for stabilizing the base frame and / or the tensionable sheet material 7.

• Zunächst werden die vier Grundprofile 2a, 2b, 2c, 2d über Steckverbindungen miteinander verbunden und über Steck-, Schraub- oder Rastverbindungen in ihrer Position zueinander fixiert. Natürlich sind andere Arten von Fixierung in ihrer Position zueinander, wie beispielsweise BolzenVerbindungen oder ähnliches denkbar. Anschließend wird die Tragwand 7 in Form eines zweiten spannbaren Flächenmaterials in den Grundrahmen 2 eingesetzt. An der Tragwand 7 sind Befestigungsmittel 6 hier in Form von Befestigungsklammern bereits vormontiert, indem sie in der Tragwand 7 ausgebildete Aussparungen eingesetzt und anschließend durch Kontermittel 6a in ihrer Position fixiert werden.

The assembly of the light box is as follows:

• First, the four basic profiles 2 a, 2 b, 2 c, 2 d are connected to one another via plug-in connections and fixed in position relative to one another via plug-in, screw or latching connections. Of course, other types of fixation in position to each other, such as bolted connections or the like are conceivable. Subsequently, the support wall 7 is inserted in the form of a second tensionable sheet material in the base frame 2. On the support wall 7 fasteners 6 are already pre-assembled here in the form of mounting brackets by using recesses formed in the support wall 7 and then fixed by counter-locking means 6a in position.

Subsequently, the electric ballasts 8 are used at the fixed by the distance of the fasteners position between two mounting locations of the lamps 5, in the present case simply clipped into the mounting bracket 6. The fastening means 6 of the ballasts 8 are in this embodiment by means of a heat-stable adhesive fixed to the support wall, since the ballasts remain after a single mounting to the support wall 7. Of course, any other known in the art fasteners such as screws, rivets, welding or the like are just as conceivable.

Subsequently, the cables 10 with different length provided plug-in attachments 8a are pushed onto the ends of the lamps 5, the electric ballasts 8 connected to each other in particular in series and connected to the provided in the base frame 2 contacting the power supply. The power supply of the light box 1 with electric power then takes place via a central supply line (not shown), which can finally be supplied with power via a conventional socket. Finally, the light box 1 is covered with the tensionable surface material 4 to be illuminated by the latter being inserted into the circumferential groove 3 provided in the base frame 2 with reinforcing strips 4a formed in its edge region. The light box 1 can then be suspended in the desired position by means of hangers (not shown) formed in the base frame 2, such as hooks or cables.

The FIG. 3 shows a schematic partial view of a light box 1 according to the invention, on whose support wall 7 necessary for power supply electrical ballasts 8 and the fastening means 6 for Illuminants 5 are already pre-assembled. In the edge region of the tensionable surface material 7 reinforcing strips 7a are formed, which can be used in the formed in the base frame 2 circumferential groove 3 for fastening and to build a supporting function of the support wall 7 promoting voltage.

The fastening means 6 can be fastened to the supporting wall 7 in various ways. On the one hand, they can simply be glued at certain positions or fastened, for example, by means of Velcro connections. Alternatively, it is also possible to carry out the fastening means with a pin which can be inserted through formed in the support wall 7 recesses to outside the space formed by the two tensionable sheet materials 4, 7 and the base frame 2 by counter-means 6a in position can be fixed. In order to prevent tearing of the tensionable sheet material 7 reinforcing eyes are provided in the region of the recesses, which are formed so that the fastening means 6 completely cover them in the mounted state, so that no light undesirably escapes to the outside.

If the position of the light source 5 in the light box 1 is to be changed, it is possible to close it by simply applying a piece of fabric to the recessed cutouts and to other desired ones Make a new recess, for example by punching bring.

The stretchable sheet material 7 is made of a woven or knitted textile, which can be printed, for example, in dysublimation. The fabric used is a particularly tightly woven polyester fabric, which is characterized by its flexibility and foldability. This makes it possible to send large advertising media in small envelopes. Due to the comparison with the prior art in advertising related Plexiglas plates lower weight of the substance, the assembly of the light box 1 and the replacement of an advertising medium can be done by a single person. The surface of the material used is absolutely free of reflection, which allows a disturbance and reflection-free view of the subject, so that the light box can be placed in any environment without regard to the lighting environment. The use of substances also positively influences the sound behavior in a room, since the sound from the room is reflected much less, especially at high frequencies.

In an alternative, not shown embodiment, the tensionable sheet material 7 is formed by a plastic sheet, which is carefully rolled up for transport to avoid kinking.

In one exemplary embodiment, which is not illustrated, the flexible, tensionable surface material 7 is folded over at an edge region to be fastened to the upper side of the base frame 2 in such a way that a loop forms on the edge region of the tensionable surface material 7. This loop can then be pulled to attach the tensionable surface material 7 to the base frame 2 and the light box 1 via a fastening strut, not shown, more or less like a curtain rod and the fastening strut can then be attached to the base frame 2. Of course, the mounting strut can also be permanently attached to the base frame 2 and be pivotable, for example, via a joint into a position in which a simple mounting of the support wall 7 to the mounting strut is possible. The tension of the support wall 7 is caused in this case by a kind of self-tension either by its own weight, or supported and reinforced by attachable in the opposite edge or edge region of the support wall additional weights.

Another not shown possibility of attachment of the support wall 7 to the light box 1 and the base profile 2 is provided for example by at least two formed on the corner region of the base frame 2 hooks are pushed onto the formed in the support wall 7, in particular through eyelets reinforced recesses can. Alternatively or in combination with the above, the base frame 2 is in its upper area over at least one longitudinal side extending a Velcro strip which is complementary to a Velcro strip formed on the support wall 7, so that attachment of the support wall 7 can be made to the base frame 2 by simply pressing the two Velcro strips. Even with these types of fastening, the tension of the support wall can either be done by its own weight and / or is supported and reinforced by attachable in the opposite edge or edge region additional weights. If a circumferential Velcro strip is provided on the base frame 2, the tension can also be caused by the fastening process of the two Velcro strips aneineander. Of course, it is possible to attach the support wall 7 by other equivalent fastening types such as snap or snap connections or form-locking connection types to the base frame 2 and the light box, without going beyond the contents of this application.

A further embodiment according to FIG. 4 provides that the tensionable sheet material 7 in several parts, in particular in the form of flexible, possibly also changeable in length textile strips 7c, 7d execute, which are insertable into the base frame 2.

Between two profiles 2 a, 2 c, two tensionable surface elements 7 c, 7 d are arranged in the form of textile Velcro strips which are variable in their length and thus can be adapted to the change in the geometric dimension of the base frame 2.

Within the base frame 2 are in the FIG. 4 five bulbs 5 used. The lamps used are T5 gas discharge lamps. The light sources 5 each have a further Velcro strip on their side facing the textile strips 7c, 7d, which forms a hook-and-loop fastener together with the Velcro strips of the textile strips 7c, 7d. The lamps 5 are aligned in this embodiment perpendicular to the textile strips 7a, 7b and connected via a pre-assembled connector system connected in series. Of course, the lighting means 5 can also be arranged parallel to the textile strips 7c, 7d, depending on how the optimal illumination of the light box 1 is best realized.

The prefabricated plug-in system is composed of prefabricated cables 10, which form a connection between the individual lamps 5 with standard plugs 8a not shown in more detail. The cables 10 are available in different lengths, so that different distances between the lamps 5 can be realized to each other, or even the lamps 5 can be arranged side by side in two parallel rows. It is possible to connect up to forty bulbs 5 in series to a power connection.

The lighting means 5 can be inserted into the base frame 2 and then fixed by simply being pressed with their Velcro strips on the textile strips 7c, 7d. Through the use of Velcro strips on the bulbs 5 and on the textile strips 7c, 7d, the lightbox 1 can be disassembled particularly quickly and is easy to transport so that the light box 1 can also be mounted in hard-to-reach places and only by one person alone. An attachment by locking elements on the bulbs 5 and locking rails on the mounting rails, or brackets on the bulbs 5, the latter enclose the latter or attached to the latter for fastening the lamp 5 to the mounting rails are also conceivable.

Depending on the desired illumination pattern, for example, every other tube can be fixed at 90 ° rotated on the mounting rails, so that the latter are in a lateral position in the base frame 2. Subsequently, the reinforcing strips of silicone formed on the tensionable surface material 4 are inserted into the grooves 3 of the base frame 2 and pressed against the base frame 2.

If, for example, due to a seasonal set-up, another advertising medium is to be inserted into the light box 1 which has a different format, such as, for example, a longer length, for example those arranged lengthwise Profiles 2b and 2d simply replaced with profiles having a length corresponding to the length of the new advertising medium to be used. In order to continue to ensure a homogeneous illumination of the light box 1, according to the extension of the light box 1 additional light sources 5 are inserted into the base frame 2 and simply connected to the already existing series-connected bulbs 5 and pressed against the textile strips 7c, 7d or in already pre-assembled other fasteners 6 used.

If now the base frame 2 are shortened due to a smaller format of the advertising medium to be used, the profile strips 2b and 2d are removed again and replaced by shorter profile strips. The textile strips 7c, 7d are then shortened to the length of the exchanged profile strips and the number of light-emitting elements 5 is reduced accordingly by simply removing the plug from the series connection.

If the change in format requires a change in the height of the light box 1, the profile strips 2a, 2c are replaced by profile strips whose length corresponds to the desired height of the light box 1 and the complete set of series-connected light sources 5 is completely replaced by lamps of the appropriate length.

Of course, it is possible to form the textile strips 7c, 7d after changing the height of the light box 1 also between the profile strips 2a and 2c and the light source 5 simply perpendicular to it so to arrange extending in the longitudinal direction of the light box 1 instead replace the light source 5 completely, though due to the format of the advertising medium or the base frame 2 brings a more advantageous illumination of the light box 1 with it. This also has the advantage that not only another complete set of bulbs with an adapted length only needs to be purchased due to a format change of the advertising medium. Another way to counter a format change is to arrange the lamps in two or more rows parallel to each other, where they can either continue to be connected in series one behind the other or even connected in parallel.

Due to the interchangeability of the individual base profiles in combination with the adaptability of the support wall or the tensionable sheet material 7 and the number and / or the position of the lighting means 5 in the light box 1, a virtually unlimited scalability of the light box 1 is possible. Thus, light boxes can be formed with dimensions up to 3 x 10 m, which makes attractive just for the use of these light boxes in the area of airports and large fashion houses.

The tensionable sheet material 7 is formed in this embodiment, within the light box 1 largely reflective. In an alternative embodiment, not shown, the tensionable sheet material 7 is also designed to be translucent, so that it converts the emitted light from the bulbs 5 when exiting the back of the light box 1 in a color effect. If, for example, the surroundings around the light box 1 are to have a reddish appearance in accordance with the motif selected on the front side, then the tensionable surface material 7 can be formed so that the light emerging through the support wall has a red appearance.

The support wall according to the invention can also be used via a support wall arrangement 11 according to the invention, which comprises at least one tensioning system and the tensionable surface material 7, in already existing profile systems, in particular in the field of exhibition construction and advertising displays. If an already existing system has a peripheral groove in the edge region of its basic profile, insertion of the supporting wall can be achieved by means of corresponding clamping systems, such as e.g. Reinforcement strip into the groove.

If, however, it is a conventional profile without a corresponding groove, it is also possible, for example, by a clamping frame, which is placed on the base profile, the tensionable sheet material to attach to the base frame. Due to the possibility of retrofitting, existing systems can be made more flexible with respect to their transport and improved in terms of scalability.

Claims (12)

1. A light box (1) with

   - at least three base profiles (2a, 2b, 2c, 2d) which in the assembled state form a closed base frame (2) onto which a first tensible plane material (4) to be illuminated can be fitted such that it forms the front side of the base frame (2),

   - at least one illuminant (5) which is disposed within the base frame (2) in order to illuminate the light box (1),

   - at least one power supply, in particular an electrical series connection unit (8) in order to supply the illuminant (5) with current,

   - at least one supporting wall disposed on the rear side of the base frame (2) which has at least one attachment means (6) for releaseably fixing the illuminant (5) and/or the electrical series connection unit (8) within the base frame (2),

   characterised in that the supporting wall is formed by a second, tensible plane material (7) which is attached to the base frame (2) such that it forms the rear side of the light box (1).
2. The light box (1) according to Claim I,
   characterised in that the first and/or second tensible plane material (4, 7) can be fitted in the base profile (2) by clamping means, in particular reinforcement strips (4a, 7a) formed on a peripheral region of the tensible plane material (4, 7).
3. The light box according to Claim 1 or 2,
   characterised in that the releaseable connection of the illuminant (5) to the tensible plane material (7) is a snap-lock connection and/or an engagement connection and/or a clamp connection and/or a connection by means of a hook and loop fastener.
4. The light box (1) according to any of Claims 1 to 3,
   characterised in that at least one recess is provided for mounting the attachment means (6) to the second tensible plane material (7) in which the at least one attachment means (6) can be fitted.
5. The light box (1) according to Claim 4,
   characterised in that a pin is formed on the attachment means (6) which, in order to attach the attachment means (6) can be passed through the recess formed on the tensible plane material (7) and can be fixed in position by counter means (6a) outside of the space to be illuminated within the light box (1).
6. The light box (1) according to any preceding claim,
   characterised in that the illuminants (5) can be connected to one another in series by means of a ready-assembled connector system, in particular two illuminants (5) being respectively operable by one electrical series connection unit (8).
7. The light box (1) according to any preceding claim,
   characterised in that the tensible plane material (7) is made up of several parts, in particular in the form of flexible cross members (7a, 7b), the length of which in particular is changeable, which can be fitted into the base frame (2).
8. The light box (1) according to any preceding claim,
   characterised in that at least one reinforcement member (9) can be fitted into the base frame (2) in order to reinforce the base frame (2) and/or the second tensible surface material (7) in the region of the attachment means (6).
9. The light box (1) according to any preceding claim,
   characterised in that the geometric dimensions of the base frame (2) can be adapted to the dimensions of the first and second tensible plane material (4, 7) by changing at least two profiles (2a, 2b, 2c, 2d).
10. The light box (1) according to any preceding claim,
    characterised in that the at least one electrical series connection unit (8) required for the power supply is pre-fitted on the second tensible plane material (7).
11. The light box (1) according to any preceding claim,
    characterised in that the supporting wall formed by the tensible plane material (7) reflects the light irradiated by the illuminant (5) or transforms it into a colour effect on the rear side of the light box (1).
12. A supporting wall arrangement for a light box (1) according to any preceding claim, comprising a supporting wall on which at least one attachment means (6) is fastened for the releaseable fixing of at least one illuminant (5) and/or at least one electrical series connection unit (8), characterised in that the supporting wall is formed by a tensible plane material (7).

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