Abstract:
A standing lamp, wall lamp or pole-mounted lamp having a base member unit and a column unit which carries illuminants at least in the region of its free end and whose special feature consists of the fact that the column unit has an at least substantially planar functional surface in which at least one cut-out is provided for the reception of a lighting system, in particular of an LED lighting system, with a presettable light radiation direction; and in that the functional surface extends at a presettable angle with respect to the mounting unit which forms a part of the adjustable angle of the light radiation direction presettable together with the lighting system. The invention is furthermore directed to a floor lamp.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to European Application No. 07 015 211.1, filed Aug. 2, 2007, the disclosure of which is herein incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     The invention relates to a luminaire, in particular a standing lamp, a wall lamp or a pole-mounted lamp, having a base mounting unit and a column unit which carries illuminants at least in the region of its free end and which has at least one at least substantially planar functional surface ( 4 ) in which at least one cut-out ( 5 ) is provided for the reception of a lighting system. The invention is furthermore directed to a floor lamp. 
     Such a luminaire is known from DE 20 2006 017 356 U1. 
     This known luminaire is a table lamp with a sheet metal housing which is arranged inclined with respect to the vertical, whose lower region is angled for the formation of a foot and whose upper region is inclined more with respect to the vertical and is made for the reception of an illuminant. The housing region between the foot and the illuminant receiver is made as a cooling housing and includes a corresponding cooling module serving to dissipate the heat generated in the illuminant region. The lighting device connected to a heat dissipation plate of the cooling module is arranged fixedly and can be made as a light emitting diode or the like which transmits light through a window provided in the housing. 
     Further known luminaires of this kind as a rule include a column which has a luminaire head which is disposed opposite its mounting end, which is connected to the end of the column and which optionally extends inclined to the axis of the column. 
     A standing lamp radiating indirectly and directly is known from DE 299 19 055 U1 which has two vertical columns fixedly connected to a bottom plate and mutually spaced apart which carry a luminaire at their free end for the generation of indirect light and between which pivotably supported direct light luminaires are provided in the region between the support plate at the floor side and the luminaire generating the indirect light, the direct light luminaires being pivotably supported both relative to the vertical columns and relative to one another. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to design a luminaire of the initially stated kind such that a structure is provided using simple components, which are thus economical to manufacture, which is suitable to satisfy different illumination functions, which can be adapted accordingly and which simultaneously takes high demands in an aesthetic regard into account. 
     This object is substantially satisfied in that the column unit comprises an obtuse angle section whose open side is closed by a coupleable, planar functional surface and in that the light radiation direction of the luminaire is determined both by the inclination of the functional surface with respect to the base mounting unit and by the adjustable light radiation direction of the lighting system. 
     It is possible by the use of a lighting system with optical focusing, in particular an LED lighting system, to make the column unit as a flat column in which the functional surface having at least one large-area light exit opening dominates the appearance. To complete the flat column, this functional surface is preferably combined with an obtuse angle section whose open side is closed by the functional surface so that an inner space with a comparatively small depth is created for the reception of the lighting system and of associated electrical and electronic functional elements. 
     It is of particular advantage for the functional surface to extend practically over the total length of the column unit since, in this manner, unlike conventional luminaires, an equipping of the functional surface with individual lighting systems can take place in dependence on the respective demands; i.e. in dependence on the respective lighting task, for example, an equipping with lighting systems in the region of the free end and simultaneously in the region close to the floor can take place such that a large-area illumination can also be combined with an accentuation lighting without the basic concept of the luminaire having to be changed or modified for this purpose. 
     The presettable inclination of the column unit with respect to the associated mounting unit results not only in a characteristic appearance of the luminaire, but above all also contributes to the avoidance of unwanted light contamination since a light radiation only takes place directly to the respective regions to be illuminated. The inclination of the column unit additionally serves for the presetting of a part of the setting angle for the light radiation direction formed together with the lighting system, in particular the LED lighting system. This in particular enables an ideal illumination close to the luminaire with high luminous intensity with a light radiation always directed to one side and, if desired, simultaneously enables an illumination of a more distant region disposed on the same side of the luminaire with a reduced intensity of illumination when lighting systems are positioned at different levels. This direct illumination of desired regions is always associated with the already mentioned avoidance of an irritating light contamination, i.e. of an unwanted brightening of ambient regions of the luminaire or of the night sky not to be illuminated. 
     Each LED lighting system preferably comprises at least one group of LEDs with individual or common optical focusing, with each group being arranged on a carrier element which is supported rotatably and whose inclination toward the axis of the cut-out provided in the functional surface is presettable. As a rule, four groups of a plurality of LEDs are, for example, combined to form a lighting system, with the single groups being individually alignable or settable. 
     The LED lighting system is made as a replaceable assembly and can be inserted into a preferably circular cut-out in the functional surface which can be closed by means of a cover glass. A cover panel is provided in the assembly spaced apart from the cover glass and arranged parallel to the cover glass, the cover panel having cut-outs corresponding to the number of the LED groups so that only the cover panel and the LED groups are visible behind the cover glass in the front view. 
     The diameter of the cut-out in the functional surface is preferably selected such that the region between the side limbs of the carrier section is fully utilized and thus a large-area light exit surface is obtained. A plurality of such light exit surfaces can be provided above one another and, optionally, also next to one another in the functional surface. 
     The planar functional surface is preferably formed by rectangular part units which can be screwed to the rear side section and which serve for the reception of the lighting system combined to form an assembly. These part units can be positioned along the total functional surface adjacent to one another or with a mutual spacing in dependence on the respective lighting task. 
     In accordance with a further preferred aspect of the invention, a floor lamp is realized in that at least one assembly of the described kind with a plurality of alignable LED lighting systems is inserted into a housing which can be sunk in the floor and which has a pot design, and this arrangement is closed by a stable light-permeable plate and a cover plate mounting the former plate and also fixing the assembly with respect to the housing. In this respect, the housing preferably has a peripheral flange which is designed in cross-section such that the cover plate is disposed flush at its free rim. 
     It is above all of advantage with this embodiment that the installation unit used in the already described embodiment variant and carrying the light sources can be used practically unchanged. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Embodiments of the invention will be explained in the following with reference to the drawing. 
         FIG. 1  is a perspective longitudinal sectional representation of an embodiment of a luminaire in accordance with the invention; 
         FIG. 2  is a sectional view of the luminaire in accordance with  FIG. 1  for the explanation of the basic structure; 
         FIG. 3  is a perspective sectional representation of an embodiment of a part unit forming a component of the functional surface; 
         FIG. 4  is a representation of a preferred support of the LED groups of the lighting system; and 
         FIG. 5  is a sectional representation of a further embodiment of the invention in the form of a floor lamp. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       FIG. 1  shows an embodiment of the invention as an especially designed path lamp in the form of a perspective longitudinal sectional representation. It includes a base mounting unit  1  made in the form of a plate in this example and a column unit  2  extending with a presettable inclination relative to this base mounting unit  1 . 
     The column unit  2  consists of an obtuse angle section  7 , in particular made of aluminum, whose open side is closed by a planar functional surface  4 . A plurality of LED lighting systems  3  are provided in the functional surface  4  distributed over the length or height of the column unit  2 . These LED lighting systems can be associated with circular cut-outs  5  which can be provided directly in a continuous functional surface; but the functional surface  4  is preferably formed in the region of each LED lighting system  3  by a rectangular part unit  14  which can be screwed to the rear side section  7  and which serves in each case for the reception of an LED lighting system combined to form an assembly. These part units  14  can be arranged along the total functional surface adjacent to one another or with a mutual spacing in dependence on the respective lighting task. 
     Each LED lighting system  3  is preferably made as a replaceable component, with the cut-out  5  in the functional surface associated with the respective lighting system  3  being closed by a cover glass  8 . 
     Each LED lighting system  3  preferably includes a plurality of LED groups  11  with an optical focusing which are mounted in an alignable manner. 
     A mounting space  6  disposed in the region of the column unit  2  at the floor side is utilized for the accommodation of ballast and other electrical components which may optionally be necessary. 
     It can be seen from  FIG. 1  that the column unit  2  is arranged with an inclination with respect to the base mounting unit  1 , with the degree of inclination being able to be selected in dependence on the purpose of the luminaire. A direct illumination of the respective desired regions is obtained by the arrangement of the illuminants set back with respect to the functional surface, by the presetting of the radiation direction of the illuminants and also by the inclination of the column unit  2 , and it is simultaneously ensured that light contamination, i.e. a non-desired brightening of ambient regions, which only has a negative effect, is avoided. 
     The sectional representation in accordance with  FIG. 2  shows the specific embodiment of the obtuse angle profile section  7  with the side limbs  9  whose free end regions are made for the screw fixing of the functional surface  4 . The LED lighting system  3  respectively associated with a cut-out  5  in the functional surface  4  represents a construction unit and respectively includes a plurality of LED groups  11  with optical focusing. These LED groups  11  are individually mounted and can be adjusted with respect to their radiation direction, for which purpose each LED group  11  is arranged on a carrier limb  12  of an angled part whose rotating limb  13  is fastened to an insert shell part  23 . 
     A cover panel  18  which has a number of openings  19  corresponding to the number of the LED groups is fastened spaced apart from the cover glass  8  in the insert shell part  23 . 
     As can be seen from  FIG. 2 , the LED groups  11  can engage partly through the openings  19 ; i.e. the LED groups are adjustable in their inclination and additionally rotatable in the region of these openings  19 . 
     The connection of the LED units takes place via a connection terminal  15  which is fastened in the rear region of the insert shell part  23 . 
     The requirement for an ideal illumination of the respective desired region disposed in front of the functional surface  4  is created by the adjustability of the radiation direction of the individual LED groups  11  in conjunction with the presettable inclination of the column unit  2 . 
       FIG. 3  shows a sectioned, perspective and detailed view of a part unit  14  of the functional surface  4  into which an LED lighting system  3  is integrated. This part unit  14  represents a sub-assembly which can be usable as a standard sub-assembly and which can be positioned in the respective desired position in the functional surface by screwing to the section  7 . 
     As can be seen from  FIG. 1 , each of these part units  14  forms a component of the functional surface  4 , with individual part units  14  being able to be arranged directly adjacent to one another or also with a mutual spacing from one another. Intermediate regions between part units  14  are closed by means of correspondingly adapted cover surfaces. 
       FIG. 4  shows a schematic representation of a possible rotational/pivotal support of the LED groups  11  which is characterized by particular simplicity. 
     Each LED group  11  is associated with a carrier angular element whose outline shape of the carrier limb  12  and rotating limb  13  preferably corresponds to the cross-sectional shape of the LED group  11 . The LED group  11  is fastened to the carrier limb  12  and this carrier limb  12  is connected via a folding joint  22  to the rotating limb  13 , with the carrier limb  12 , the rotating limb  13  and the folding joint  22  preferably being made of a stamped part. The angle between the carrier limb  12  and the rotating limb is adjustable in a presettable manner via the folding joint  22 . 
     The plate-shaped rotating limb  13  is centrally rotatably supported, and indeed via a base plate  20  which has a step which engages into a rotary boundary slot  21  in the rotating limb  13 . 
     The type of support of the rotating limb  13  at the insert shell part  23  can be seen from  FIG. 2 , with it also being visible that the base plate  20  is rotationally secured with respect to the insert shell part  23  via a stamped lug  10 . 
     The luminaire in accordance with the invention can not only be used as a path lighting or a comparatively high pole-mounted luminaire by a corresponding design of the base mounting unit and the selection of the longitudinal extent of the functional surface, but can also be used as a wall lamp, with the mount being able to be designed such that the functional surface having the lighting units extends at a presettable angle with respect to the respective wall and the main radiation direction of the light can be preset in a simple manner by orientation of the functional surface. 
     Luminaires of very different lengths can be realized at comparatively low cost with a small effort by the combination of an extruded section with a substantially planar functional surface. 
       FIG. 5  shows a further advantageous aspect of the invention in the form of a floor lamp. 
     It is of particular advantage here that the assembly  16  shown in  FIG. 5  can be used in practically unchanged form and floor lamps can be created by integration of this assembly into a housing  25  which can be sunk in the floor  24 , the floor lamps including one or more of these assemblies  16 . 
     In this respect, the depth of the housing  25  is designed such that sufficient space is available beneath the respective assembly  16  for the reception of the electrical or electronic functional components, in particular of the ballast  26 . At the opening side, the housing  25  has a stable peripheral flange  28  which is made for the shape-matched or flush reception of a stable cover plate. The peripheral flange  29  of the assembly  16  is clamped between the cover plate  27  and the horizontally extending region of the housing flange  28  with interposition of suitable sealing elements. 
     As already described in connection with the previous embodiments, the LED groups  11  included in the assembly  16  are rotatably and pivotably supported such that the respective desired and ideal radiation characteristics can also be set in combination with this floor lamp. 
     The rotational and pivotal support of the illuminants contributes in all embodiments, in particular in the embodiments having a plurality of lighting systems  3  distributed directly over the height of the luminaire, for example, to a floor-side region located in front of the luminaire being able to be effectively illuminated with a high light intensity, whereas the lighting systems  3  located in the upper region of the luminaire can be selected or set with respect to their radiation characteristics such that the respective desired illumination of a larger spatial region can be ensured with a lower light intensity. 
     REFERENCE NUMERAL LIST 
     
         
           1  base mounting unit 
           2  column unit 
           3  LED lighting system 
           4  functional surface 
           5  cut-out 
           6  receiving space 
           7  section 
           8  cover glass 
           9  side limb 
           10  stamped lug 
           11  LED group with optical focusing 
           12  carrier limb 
           13  rotating limb 
           14  part unit of the functional surface 
           15  connection terminal 
           16  assembly 
           17  axis of rotation 
           18  cover panel 
           19  opening in cover panel 
           20  base plate 
           21  boundary slot 
           22  folding joint 
           23  insert shell part 
           24  floor 
           25  housing 
           26  ballast 
           27  cover plate 
           28  flange 
           29  peripheral flange