DE20205809U1 - Extendable pendant lamp - Google Patents

Description

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Dipl.-Chem. E.L. FRITZ Dr. Dipl.-Phys. R. BASFELD Patent attorneys

M. HOFFMANN

B. HEIN Lawyers

Ostentor 9 59757 Arnsberg GM 02/034

12.04.2002/GR/KA/HU

Neuhaus Licht GmbH Graureiherweg 20

59519 Möhnesee

"Extendable pendant light"

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The present invention relates to a pendant lamp with a lamp body.

Such pendant lights are widely known from everyday life. These pendant lights usually have a housing that can be attached to the ceiling of the room, from which electrical cables emerge, which lead to a lamp body that is suspended from these electrical cables. Occasionally, however, the lamp body is not suspended from the electrical supply lines, but hangs from special rope connections or similar. Pendant lights are very popular as table lamps above a dining table. Their height can often be adjusted. The lighting of the dining table can thus be designed to suit the needs of the user. Various shapes of lamp bodies are also known, which are often chosen according to the shape of the dining table.

However, dining tables can often be extended by pulling out and/or inserting intermediate leaves, so that a larger group can be fed at a smaller table. This means that once the table has been enlarged, the pendant light hanging above the dining table is no longer adapted to the size of the table. On the one hand, the pendant light does not illuminate the entire size of the dining table, and on the other hand, a pendant light that is too small often looks unaesthetic above an enlarged dining table.

The invention is therefore based on the object of proposing a pendant lamp which can be variably adapted to the size of a table to be illuminated.

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This object is achieved according to the invention in that the lamp body has guide means in which supports are slidably mounted, with lighting means being attachable to the support. If the table under a lamp according to the invention is enlarged, the lamp can be enlarged by simply moving or pulling out the supports. By pulling out the support with the lighting means attached to it from the rest of the lamp body, the pendant lamp can be easily adapted to the size of the table to be illuminated. It goes without saying that such a pendant lamp can be used not only to illuminate dining tables or other extendable or enlargeable tables, but also for any other lighting purposes.

According to the invention, in a first embodiment of the pendant light, the supports can be assigned to one another in pairs, with the pairs each carrying a lamp base. Each pair of supports can then be assigned a pair of guide means, with each support of a pair of supports being assigned a guide means of the assigned pair of guide means. Each of the supports is then advantageously connected in an electrically conductive manner to the guide means assigned to this support.

In a second preferred embodiment, each of the supports can carry a lamp base. Each of the supports is then advantageously assigned a pair of guide means. The supports and the guide means assigned to the support can then be connected in an electrically conductive manner.

The luminaire body of a pendant luminaire according to the invention can have a fastening plate to which the guide means are fastened.

The guide means of a pendant lamp according to the invention can be U-shaped rails in cross section. These U-shaped rails of a pair of guide means are then advantageously attached parallel to one another on the fastening plate.

According to the invention, the U-rails are each fastened to the fastening plate by one of their legs, with either the webs of the U-rails or the open sides of the U-rails facing each other.

In a pendant lamp according to the invention, the fastening plate can then be electrically conductive, with at least one guide means of each pair of guide means being electrically conductively connected to the fastening plate. According to the invention, the supports can have L-shaped rails in cross section and slides attached to these L-rails, with the slides of an L-rail being slidably mounted in a guide means. The slides and the L-rails are advantageously also electrically conductively connected to one another. Furthermore, according to the invention, the slides and the guide means guiding the slides are advantageously electrically conductively connected.

Each of the supports may have one L-rail in the first preferred embodiment, while each support according to the second preferred embodiment has two L-rails.

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Further features and advantages of the present invention will become clear from the following description of preferred embodiments with reference to the accompanying drawings.

Fig. 1 a pendant lamp according to the invention,

Fig. 2 the housing and the counterweight of the pendant lamp according to the invention according to Fig. 1, in section or partially broken away,

Fig. 3 the lamp body of the lamp according to the invention according to Fig. 1 in longitudinal section,

Fig. 4 the lamp body in section along the line IV-IV in

Fig. 3,

Fig. 5 the lamp body in section along the line V-V in Fig. 3,

Fig. 6 the lamp body in section along the line Vl-Vl in Fig. 3,

Fig. 7 the lamp body without support in a view from below,

Fig. 8 the mounting plate of the lamp body in a top view,

Fig. 9 Support with lamp base, lamp and

Lampshade in cut,

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10 Carrier according to Fig. 9 in a side view,

Fig. 11 Carrier according to Fig. 9 in a top view, Fig. 12 Carrier according to Fig. 9 in another side view.

The pendant light according to Fig. 1 has a housing A which can be attached to a ceiling of a room. Starting from this housing, a lamp body D is suspended from first ends of electrical supply lines B. The lamp body D is adjustable in height, for which purpose the electrical supply lines B are guided in the housing A via deflection rollers described later and second ends of the electrical supply lines are fixed in a counterweight C.

The housing A has a ceiling fitting 8, which is essentially plate-shaped. This ceiling fitting 8 is attached to the ceiling of a room. Threaded pins 1 pointing downwards are pushed through the ceiling fitting 8. The threaded pins 1 are fixed to the ceiling fitting using hexagon nuts 3b. A spacer 4 is used to further fix them using additional hexagon nuts 3b. A housing part 7 can be pushed onto the countersunk screws 1 on the free end of the threaded pins 1. The housing part 7 is then screwed to the threaded pins 1 using the end heads 6.

Furthermore, a transformer 16 is screwed onto the ceiling fitting 8, which provides electrical voltage, in this case low voltage, according to the light source used. The electrical voltage provided can be tapped off via terminals not shown. Only some of these terminals lead

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can be tapped. From these terminals, lines 13, only partially shown, lead to the deflection rollers 10 attached to the inside of the housing part 7. These deflection rollers 10 are mounted in bearings 9. The deflection rollers 10 are electrically connected to the supply lines 13 and thus to the connection terminals on the transformer 16.

To ground the housing part 7, a grounding line 18 is fixed to the housing part 7 by means of the screw connection 3a. The grounding line 18 is connected to the ceiling fitting 8 in a manner not shown.

The housing part 7 has outlets below the deflection rollers 10, through which electrical supply lines are led from the counterweight C to the lamp body D via the deflection rollers 10. The counterweight C has an elongated body 27, in which the second end of the electrical supply line 21 is fastened by means of a hub screw 28. In order to prevent electrical contact between the body 27 and the electrical supply line 21, the electrical supply line is guided through or in the body 27 in plastic sleeves 26. From the fastening point of the electrical supply line 21 in the body 27 by means of the hub screw 28, the electrical supply lines run into the housing A, are guided there in the housing A via the deflection rollers 10 and are guided out of the housing A again through the outlets in order to be guided through holes provided in the body 27 of the counterweight C to the lamp body D, where the lamp body D is suspended from the first ends of the electrical supply line.

The holes in the body 27 are also lined with plastic 26, so that an electrically conductive connection between the body 27 and the electrical supply lines 21 is also possible here.

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is prevented. The electrical supply lines 26 are guided through these plastic linings 26 with little play. This makes it possible for the electrical supply lines 26 to slide through the holes. By moving the lamp body D or the counterweight C up and down, the distance between the lamp body D and the housing A can be adjusted and the height of the lamp body can be adjusted. To fix the electrical supply lines in the holes, i.e. to set the set height of the lamp body or the set distance between the housing A and the lamp body D, fixing means 22, 23, 24 are provided on the counterweight C. For this purpose, a threaded bolt 23 is screwed into an end piece 22, which thus forms an adjusting screw 22, 23 with the end piece 22. This adjusting screw 22, 23 is screwed into a hole in a plastic part 24.

This plastic part 24 is inserted into a recess at the ends of the body 27 of the counterweight C. It has a further hole perpendicular to the threaded hole receiving the adjusting screw 22, 23, through which the electrical supply lines 21 are guided. By screwing the adjusting screw 22, 23 into the threaded hole of the plastic part 24, the electrical supply line 21 is fixed to the counterweight C.

The lamp body (Fig. 3) has a hood 33 in which a fastening plate 34 is mounted. U-rails 35 are attached to the fastening plate 34. The hood 33, which is U-shaped in cross section and whose front sides are closed by plastic parts 47, is suspended from the ends of the electrical supply lines 21 by means of two shaped parts 29. The type of suspension is described in more detail later with reference to Figures 5 and 6. The plastic parts 47 are attached to the

The countersunk screws 45 engage in end knobs 46 and plastic parts 47.

First, the fastening of the U-rails to the fastening plate 34 will now be described in more detail with reference to Fig. 4. The fastening plate 34 is provided with holes arranged linearly in four rows running in the longitudinal direction, as shown in Fig. 8. The two outer rows of holes running in the longitudinal direction are used to fasten an outer U-rail 35 each. These U-rails 35 are screwed to the fastening plate 34 with one of their legs in such a way that the web of the U-rail points towards the outside of the fastening plate 34.

The U-rail is attached using countersunk screws 41, which pass through the holes in the mounting plate 34 and are screwed into holes in the legs of the U-rails 35 with a plastic sleeve in between. Instead of the plastic disk, a metal disk can also be used to attach the outer U-rails 35. The screw creates an electrically conductive connection between the mounting plate 34 and the outer U-rails 35.

The two inner holes in the mounting plate, which are arranged in a row, are also used to attach U-rails 35 to the mounting plate 34. These U-rails are also screwed to the mounting plate 34 with their legs. However, the webs of these two inner U-rails 35 point towards the inside of the mounting plate 34, i.e. the webs of the inner U-rails 35 face each other. This also means that the open sides of the outer and adjacent inner U-rails 35 face each other.

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The inner U-rails are also attached using countersunk screws 44, which are inserted through the holes mentioned in the two inner rows of the mounting plate 34. Plastic sleeves 42 are inserted into the holes. The countersunk head of the countersunk screws 44 is also

Plastic washers 43. The countersunk screws screwed into the inner U-rails in this way are electrically insulated from the fastening plate 34. There is therefore no electrical connection between the inner and outer U-rails 34. 10

Fig. 5 shows the electrical connection of the inner U-rails to the low voltage provided by the ballast, as well as a suspension of the lamp body D on the electrical supply lines 21 and the fastening of the fastening plate 34 to the cover 33. The end of the electrical supply line 21 is guided through a flange part 29 according to Fig. 5. This flange part has a hole which extends along the longitudinal axis of the flange part 29. The electrical supply line 21 is inserted into this hole. The electrical supply line 21 is firmly clamped in the flange part 29 by means of a hub screw 30 which is screwed into the side of the flange part. The lower end of the flange part has an external thread. An insulating bushing 31 is initially pushed onto this external thread. The cover 33 and a plastic disk 32 are then pushed onto this insulating bushing 31. This is followed by another plastic disk 32, a fastening plate 34 and another insulating bushing 31. A cuboid-shaped metal part 40 with a central threaded hole is screwed into the now remaining end of the external thread of the facon part 29. The hood 33 and the fastening plate 34 are thus clamped between the cuboid-shaped metal part 40 and the facon part 29 and attached to the lower end of the electrical supply line 21. Since the facon part 29 is made of metal, there is a conductive connection between the electrical supply line 21 and the facon part 29. The insulating bushings 31 prevent electrical contact between the fastening plate 34 and the facon part 29. The plastic disks 32 prevent electrical

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Contact between the mounting plate 34 and the hood 33 is prevented.

The dimensions of the cuboid metal part 40 are such that this cuboid metal part 40 fits exactly between the two inner U-rails 35. The web of the U-rails 35 is provided with holes in the area where the lamp body is suspended from the electrical supply lines 21, which are aligned with holes in the cuboid metal part 40. A countersunk screw 41a is screwed through these holes through the web of the U-rails 35 into the cuboid metal part 40. The countersunk screws 41a thus provide an electrically conductive connection from the electrical supply line 21 via the shaped part 29 and the cuboid metal part 40 to the inner U-rails 35.

Fig. 6 shows the electrical connection of the outer U-rails and the low voltage provided by the transformer, as well as a suspension of the lamp to the electrical supply lines 21 and a further fastening of the fastening plate 34 to the cover 33. The end of the electrical supply line 21 is guided through a flange part 29 according to Fig. 6, as shown in Fig. 5. This flange part has a hole which extends along the longitudinal axis of the flange part 29. The electrical supply line 21 is then guided in this hole. The electrical supply line 21 is clamped in the flange part 29 by means of the hub screw 30, which is screwed into the side of the flange part. The lower end of the flange part 29 has an external thread. An insulating bushing 31, the cover 33 and two plastic disks 32 as well as the fastening plate 34 and a toothed disk 39 are attached to this external thread. The remaining end of the external thread of the flange part 29 is screwed into a cuboid-shaped metal part 38 with a central threaded hole. The hood 33 and the fastening plate 34 are thus connected via the screw connection between the cuboid-shaped metal part 38

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and the flange part 29 are connected to one another. At the same time, the lamp body D is attached to the first end of the electrical supply line. An electrical connection is established between the electrically conductive flange part 29 and the electrical supply line 21 via the hub screw 30. In contrast, the upper insulating bush 31 and the plastic disks 32 prevent electrical contact between the flange part and the hood 33. Since, in contrast to the connection according to Fig. 5, the lower electrical insulating bush 31 is replaced by a toothed disk 39, electrical contact is achieved between the flange part and the fastening plate 34. There is thus an electrically conductive connection between the fastening plate 34 and the first end of the electrical supply line 21. Since, as already explained, the outer U-rails 35 are electrically connected to the fastening plate 34, there is an electrically conductive connection between the outer U-rails 35 and the electrical supply line 21 shown in Fig. 6, while there is a different electrical connection between the inner U-rails and the electrical supply line 21 according to Fig. 5. Since the electrical supply lines 21 according to Fig. 5 and Fig. 6 are each connected to different poles of the transformer 16, different potentials are led from the transformer to the inner and outer U-rails 35 of the lamp body D. These different voltages can thus be tapped off from the U-rails of the lamp body D.

The voltages are tapped from the U-rails 35 via supports 49, 50, 51, 52. How the supports 49, 50, 51, 52 are attached to the U-rails 35 and how the voltage is then fed to the lamps via the supports 49, 50, 51, 30, 52 is shown in Figures 9, 10, 11 and 12.

The support 49, 50, 51, 52 has a square tube 52. In the embodiment shown, a lamp base 57 is supported by two square tubes 52. The lamp base 57 is screwed to the square tubes 52. The square tubes 52 are spaced apart from one another and have no electrical connection to one another. The screw connection provides the square tubes 52 with an electrical connection to the lamp base 57 and thus also to the light source 61 inserted in the lamp base 57. A lampshade 60 is clamped to the light source base 57 in a known manner. The supports 49, 50, 51, 52 have L-rails 51 on the top of the square tubes 52, which are screwed to the square tube 52 with hub screws 41. Axles 50 are screwed into the upward-facing leg of the L-rails 51. Slides 49 with holes are placed onto these axes 50. These slides 49 have a height that corresponds to the distance between the legs of the U-rails 35. The U-rails 35 each accommodate the slides 49 attached to one L-rail 51, while the slides 49 attached to the other L-rail 49 are accommodated by the other U-rail 35.

Thus, in the present embodiment of a lamp according to the invention, two pairs of supports can be slidably mounted on the two pairs of U-rails. These pairs of supports can be pulled out from the rest of the lamp body D on different sides with the lamps 61 attached to them. Since the L-rails 51 do not extend over the entire length of the supports (49, 50, 51, 52), as can be seen in particular from Figures 11 and 11a, but the upper edge of the square tubes 52 lies below the lower edge of the hood 33, the supports (49, 50, 51, 52) can be pushed to the right or left over the side edge of the hood 33 until the L-rails are at the hood

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33 closing plastic parts 47. It is thus possible to enlarge the pendant lamp in its longitudinal extension by pulling out the supports (49, 50, 51, 52) beyond the edges of the hood 33.

Claims (17)

1. Pendant lamp with a lamp body (D), characterized in that the lamp body (D) has guide means ( 35 ) in which supports ( 49 , 50 , 51 , 52 ) are slidably mounted, wherein lighting means ( 61 ) can be attached to the supports. 2. Pendant lamp according to claim 1, characterized in that the supports ( 49 , 50 , 51 , 52 ) are assigned to one another in pairs, wherein the pairs of supports ( 49 , 50 , 51 , 52 ) each carry a light source base ( 57 ). 3. Pendant lamp according to claim 2, characterized in that each pair of supports ( 49 , 50 , 51 , 52 ) is assigned a pair of guide means ( 35 ), wherein each support ( 49 , 50 , 51 , 52 ) of a pair of supports ( 49 , 50 , 51 , 52 ) is assigned a guide means ( 35 ) of the assigned pair of guide means ( 35 ). 4. Pendant lamp according to claim 3, characterized in that each support ( 49 , 50 , 51 , 52 ) is electrically conductively connected to the guide means ( 35 ) associated with this support and that each support ( 49 , 50 , 51 , 52 ) of a pair of supports is connected to one pole of each lamp base. 5. Pendant lamp according to claim 1, characterized in that each support carries a lamp base. 6. Pendant lamp according to claim 5, characterized in that each support is associated with a pair of guide means. 7. Pendant lamp according to claim 6, characterized in that the supports and the associated guide means ( 35 ) are electrically conductively connected and that the supports are each connected to one pole of the lamp base, the other poles of the lamp base being electrically connected via a supply line. 8. Pendant lamp according to one of claims 1 to 7, characterized in that the lamp body (D) has a fastening plate ( 34 ) to which the guide means ( 35 ) are fastened. 9. Pendant lamp according to one of claims 1 to 8, characterized in that the guide means are U-shaped rails ( 35 ) in cross section. 10. Pendant lamp according to claim 9, characterized in that the U-rails ( 35 ) of a pair of guide means are attached parallel to each other to the fastening plate ( 34 ). 11. Pendant lamp according to claim 10, characterized in that the U-rails ( 35 ) are fastened by their legs to the fastening plate ( 34 ), wherein either the webs of the U-rails ( 35 ) or the open sides of the U-rails ( 35 ) face each other. 12. Pendant lamp according to one of claims 3 to 4 and one of claims 8 to 11, characterized in that the fastening plate ( 34 ) is electrically conductive and that in each case one guide means ( 35 ) of the pairs of guide means ( 35 ) is electrically conductively connected to the fastening plate ( 34 ). 13. Pendant lamp according to one of claims 1 to 12, characterized in that the supports ( 49 , 50 , 51 , 52 ) have L-shaped rails ( 51 ) in cross section and slides ( 49 ) fastened to these L-rails, wherein the slides ( 49 ) of an L-rail ( 51 ) are slidably mounted in a guide means ( 35 ). 14. Pendant lamp according to claim 13, characterized in that the slides ( 49 ) and the L-rail ( 51 ) are electrically connected. 15. Pendant lamp according to claim 13 or 14, characterized in that the slides ( 49 ) and the guide means ( 35 ) guiding the slides ( 49 ) are electrically conductively connected. 16. Pendant lamp according to one of claims 13 to 15 and one of claims 2 to 4, characterized in that each support has an L-rail ( 51 ). 17. Pendant lamp according to one of claims 13 to 15 and one of claims 5 to 7, characterized in that each support has two L-rails ( 51 ).