DE20109707U1 - Luminaire, especially floor or table lamp - Google Patents

Description

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Gesthuysen, by Rohr & Eggert

01.0459.2.CO Essen, 8 June 2001

Utility model application

the company

Günther Lambert GmbH Konstantinstrasse 303

41238 Mönchengladbach

with the label

Lamp, especially floor or table lamp

Lamp, especially floor or table lamp

The invention relates to a lamp, in particular a floor or table lamp, with the features of the preamble of claim 1.

The floor or table lamp known from practice, from which the invention is based, has a lamp head with a truncated cone-shaped reflector in which the light source is arranged. The lamp head is located at the end of a rod-shaped, elongated lamp holder, at the other end of which a handle is attached, with which the lamp head can be moved. This movement takes place by means of a swivel joint that is located on the head of the stand. The lamp holder can be swiveled on the swivel joint in a vertical plane that encloses the longitudinal axis of the stand or runs parallel to it. This swiveling is achieved by connecting the joint parts of the swivel joint to one another via a connecting screw that runs transversely to the stand and is arranged centrally to the swivel joint with an actuating toggle. After loosening the connecting screw, the lamp holder can be brought into the desired inclination position relative to the stand. By tightening the connecting screw, the joint parts are then fixed against one another again as soon as the lamp head has reached its fixed position.

The joint parts of the swivel joint in the well-known floor or table lamp described above are each hemispherical and are joined together on their flat sides, forming the vertical swivel plane. The joint parts are hollow on the inside so that a power supply cable can be led through the base, the stand, the swivel joint and the lamp holder to the lamp head.

The circumstances explained above are basically independent of whether a lamp is a floor or table lamp with a base and a stand that rises essentially vertically from it or another type of lamp, such as a wall lamp or a ceiling lamp. In the case of a wall lamp or a ceiling lamp, the stand is formed by a different type of base, such as a cross member that is attached to the wall.

ger or a suspension bracket hanging from the ceiling. Accordingly, the teaching of the present invention relates not only to floor or table lamps, but also to lamps in general, in particular also to wall or ceiling lamps. The explanation will be continued using the example of a floor or table lamp.

In the case of the well-known floor or table lamp, which was previously explained, the adjustment options are limited. The lamp holder can only be swiveled up and down and the lamp head at the end of the lamp holder can also only be swiveled up and down. The teaching is therefore based on the problem of optimizing the well-known lamp in terms of adjustment options.

The problem outlined above is solved in a lamp, in particular a floor or table lamp, with the features of the preamble of claim 1 by the features of the characterizing part of claim 1. The essential feature is the arrangement of the pivot plane, which is formed by the joint parts of the pivot joint, at an acute angle to the longitudinal axis of the stand. This ensures that a pivoting movement of the lamp holder from the neutral position across the stand simultaneously results in a sideways movement of the ends of the lamp holder relative to the stand. While in the known lamp the handling handle pivots downwards when the lamp head is pivoted up and immediately collides with the stand, the handling handle in the arrangement of the pivot plane according to the invention pivots sideways past the stand during the same pivoting movement.

The arrangement of the pivot plane at an acute angle to the longitudinal axis of the stand has the further advantage that the lamp head can assume very different inclinations with respect to the stand depending on the pivot position. This can be implemented particularly expediently when the lamp holder is mounted in the pivotable joint part so that it can rotate about its longitudinal axis, as is provided according to the preferred teaching of the present invention.

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According to a further preferred, independent teaching of the present invention, the joint parts of the swivel joint are connected to one another by means of a screw connection with a small pitch that leaves a free space inside. Unlike the connection of the joint parts known in the prior art by means of a centrally arranged connecting screw running transversely to the swivel plane, the screw connection with a small pitch that leaves a free space inside creates on the one hand the free space for laying the power supply cable in the swivel joint, and on the other hand an optimal connection of the joint parts to one another without any foreign parts visible on the outside (connecting screw). The small increase in the screw connection ensures that the gap between the joint parts only varies minimally over the permissible swivel angle of the two joint parts. This is a functionally and visually very practical solution.

According to a further, independent teaching of the invention, a pivot-inhibiting spring device is arranged between the joint parts of the pivot joint. This pivot-inhibiting spring device allows the relative positions of the lamp holder to be fixed sufficiently well in relation to the stand without having to use the locking screw provided in the prior art. Such a pivot-inhibiting spring device can be implemented using appropriately designed spring elements inside the pivot joint. A locking mechanism can also be used, for example, using locking balls loaded by springs.

Preferred embodiments and further developments of the lamp according to the invention, in particular floor or table lamps, are the subject of the further subclaims.

The invention is explained in more detail below using a drawing which merely represents an exemplary embodiment. The drawing shows:

Fig. 1 an embodiment of the lamp in "normal position",

example "table lamp",

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Fig. 2 a view of the swivel joint at the head of the stand, from

left in Fig. 1,

Fig. 3 a view of the swivel joint from behind in Fig. 1 but

with the lamp holder arranged exactly horizontally,

Fig. 4 a view similar to Fig. 3 with the lamps arranged at an angle

carrier,

&iacgr;&ogr; Fig. 5 a representation of the table lamp corresponding to Fig. 1 with

lamp head pointing upwards,

Fig. 6 in section a preferred embodiment of the swivel

joint of the lamp, both joint parts assembled,

Fig. 7 shows a further example of the swivel joint in section

kes of the lamp, both joint parts assembled,

Fig. 8 shows a view of the pivoting joint part of the pivoting joint.

kes from Fig. 7,

Fig. 9 a section of the lamp holder for a swivel joint made of

Fig. 7 and 8 in the area of the pivoting joint part of the pivot joint.

The floor or table lamp shown in Fig. 1 represents a preferred embodiment of the invention; the explanations are not to be understood as restrictive in this respect, and can therefore also be applied to other lamps, in particular wall and ceiling lamps.

The lamp shown, shown here in the version as a table lamp, firstly shows a base 1 and a stand 2 that rises essentially vertically from the base 1. At the head of the stand 2 there is a rod-like lamp holder 3 that runs approximately transversely to the stand 2 and has a lamp head 4 with a reflector 5 (lampshade) at one end and a handling handle 6 for manipulating the lamp at the other end.

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head 4. The parts of the table lamp shown here are preferably made of stainless steel or brass in the illustrated embodiment.

At the head of the stand 2 there is a swivel joint 7 on which the lamp holder 3 is pivotably mounted. Fig. 1, 2 and 6 make it particularly clear that the swivel joint 7 has a fixed joint part 8 connected to the stand 2 and a pivotable joint part 9 connected to the lamp holder 3, which together form a pivot plane 10.

By pivoting the joint part 9 relative to the joint part 8, the lamp holder 3 can be brought into different inclination positions with respect to the stand 2.

Fig. 2 shows very nicely that according to the teaching of the invention the pivot plane 10 is inclined at an acute angle to the longitudinal axis of the stand 2. To be precise, the angle here is between 30° and 60°, and in the preferred embodiment shown it is approximately 45°.

Fig. 1 indicates that a power supply cable 11 is guided inside through the base 1, the stand 2, the swivel joint 7 and the lamp holder 3 to the lamp head 4. This corresponds to a preferred embodiment of this floor or table lamp.

Fig. 2, 3 and 4 clearly show how flexible the adjustment of the lamp head 4 relative to the stand 2 can be achieved by means of the swivel joint 7 forming an inclined swivel plane 10.

Visually, it is particularly noteworthy that in the illustrated and preferred embodiment, the joint parts 8, 9 of the swivel joint 7 are each hemispherical and are joined together on their flat sides to form the swivel plane 10. A hemispherical design of the joint parts 8, 9 is not, however, a mandatory requirement for the functionality of the invention, but visually it is a particularly successful solution.

In the state of the art, it is provided that the joint parts of the swivel joint are connected via a centrally arranged connection running transversely to the swivel plane.

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binding screw &ogr;. etc. are connected to one another. This technique of connecting the joint parts 8, 9 can also be used for the swivel joint 7 in the floor or table lamp according to the invention.

However, the illustrated and particularly preferred embodiment shows a particularly useful connection technology, which is particularly tailored to the internal arrangement of the power supply cable 11. In particular, reference should be made here to the detailed illustration of the swivel joint 7 in Fig. 6.

According to a preferred, independent teaching, it is provided that the joint parts 8, 9 of the swivel joint 7 are connected to one another by means of a screw connection 13 with a slight pitch that runs transversely to the swivel plane 7 and leaves a free space 12 (for the power supply cable 11) inside the joint parts 8, 9. Fig. 6 shows an external thread M 15 x 1 on the fixed joint part 8 and a corresponding internal thread M 15 x 1 on the connected swivel joint part 9.

Fig. 7 shows a variant of the swivel joint 7 with a dimension M 32.5 x 0.75, i.e. with a significantly larger diameter of the screw connection 13.

The slight pitch of the screw connection 13 ensures that only a minimal change in the width of the annular gap between the joint parts 8, 9 occurs during the pivoting of the joint part 9 relative to the fixed joint part 8, which is already limited by a pivot limiter.

The drawing also shows that a pivot-inhibiting spring device can be arranged between the joint parts 8, 9. Such a pivot-inhibiting spring device can be, for example, a partially circular leaf spring, which allows the pivoting joint part 9 to be continuously fixed relative to the fixed joint part 8. The spring force of the spring device must of course be matched to the weight exerted by the lamp head 4. An alternative is to work with detents, for example with spring-loaded detent balls. Here,

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Various suggestions are known from the prior art for realizing such a continuously adjustable or lockable relative position of two joint parts 8, 9 without a locking screw. In Fig. 6, the spring of the spring device cannot be seen, but a spring channel 20 can be seen, which is arranged radially outside the screw connection 13. In the further embodiment of the swivel joint 7 shown in Fig. 7, however, the spring channel 20 and a wave spring 21 arranged therein can be seen, which together form the swivel-inhibiting spring device. Here, the spring channel 20 is arranged radially inside the screw connection 13. This is expedient from a manufacturing point of view with regard to the machining of the joint parts 8, 9.

As already mentioned, it is recommended to provide a swivel limiter between the joint parts 8, 9 to protect the power supply cable 11. In the illustrated and preferred embodiment, this swivel limiter is implemented by a grub screw 14 or similar arranged in a joint part 8 engaging in a swivel limiting groove 15 of the other joint part 9. The swivel limiting groove 15 indicated in Fig. 6 and Fig. 7 extends over an angle of preferably 120°. It is milled into the surface of the swiveling joint part 9 with a width of a few mm and a depth of a few mm. The grub screw 14 engaging in this, here grub screw M3, prevents the joint part 9 from swiveling relative to the joint part 8 beyond this angle, so that the power supply cable 11 is not twisted too much.

Particularly preferred is an embodiment in which it is provided that the fixed joint part 8, i.e. the joint part 8 on the stand 2, can be pivoted on the stand 2 about the longitudinal axis of the stand 2, and preferably also with limited pivoting in order not to place too much strain on the power supply cable 11.

The illustrated and preferred embodiment also shows, particularly clearly visible in Fig. 6 and Fig. 7, that the lamp holder 3 is mounted in the pivotable joint part 9 so as to be rotatable about its longitudinal axis. Between the lamp holder 3 and the pivotable joint part 9 there is preferably a flat

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if a rotation angle limitation is provided. This rotation angle limitation also serves to protect the power supply cable 11.

The rotation angle limitation is implemented in the embodiment of Fig. 6 by arranging a grub screw 16 in the pivotable joint part 9, grub screw M3, which engages in a groove on the lamp holder 3. However, the groove on the lamp holder 3 does not run all the way around, but only over an angular range, so that here again the limitation to an angle of rotation results.

Finally, in the embodiment shown, the lamp head 4 is attached to the lamp holder 3 by means of a swivel joint 17. According to a particularly preferred design, the swivel joint 17 could also be a combined swivel/rotary joint, which in turn would allow a limited rotation of the lamp head 4 relative to the lamp holder 3.

The embodiment of Fig. 6 shows the grub screw 16 in a threaded hole that is open to the outside. This is not optimal visually. It is also possible to imagine that the grub screw 16 or similar is arranged in a concealed manner in the pivoting joint part 9, in particular being accessible from the surface facing the other joint part 8. However, the hole may then have to be made in a non-optimal orientation.

The embodiment shown in Figs. 7 to 9 not only shows the arrangement-related differences from the first embodiment explained above, this embodiment also shows a different implementation of the rotation angle limitation.

Fig. 8 first shows a through hole 18 in the pivoting joint part 9, which is arranged in a concealed manner, namely on the side facing the fixed joint part 8. This through hole 18 cannot be seen from the outside. In principle, a grub screw 16 according to the embodiment in Fig. 6 could also be screwed directly into this through hole 18 if it were designed as a threaded hole.

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However, from a manufacturing point of view, it has proven to be particularly useful that an opening is provided in the lamp holder 3 at a position corresponding to the position of the through hole 18 in the assembled state, extending over a certain angle range on the circumference, that a swiveling counterpart 19 carrying a threaded hole or the like is arranged in the interior of the lamp holder 3 in the assembled state at the level of the opening and that the grub screw 16 or the like is firmly inserted in the threaded hole or the like in the swiveling counterpart 19 and projects radially outwards into the through hole. This can be clearly seen in Fig. 9. Through the opening in the

The swivel limit for the lamp holder 3 is implemented by means of the wall of the lamp holder 3. The grub screw 16 is screwed through the through hole 18 into the threaded hole in the swivel counterpart 19 (indicated in Fig. 9). Instead of a grub screw 16 and threaded hole, a pin or the like that can be inserted with a press fit can also be used here if the ability to be dismantled is not very important.

In Fig. 9, to the left of this arrangement, you can see the continuation of the free space 12 for introducing the power supply cable 11 from the swivel joint 7 into the lamp holder 3, which then leads away to the left in Fig. 9. In Fig. 7, the routing of the power supply cable 11 is indicated schematically.

Claims (19)

1. Lamp, especially a floor or table lamp,
with a stand ( 2 ), preferably rising from a base ( 1 ) or another base,
with a lamp holder ( 3 ) arranged on the head of the stand ( 2 ) and running approximately transversely to the stand ( 2 ) with a lamp head ( 4 ) arranged at one end and a handling handle ( 6 ) arranged at the other end and
with a swivel joint ( 7 ) at the head of the stand ( 2 ) on which the lamp holder ( 3 ) is pivotally mounted,
wherein the pivot joint ( 7 ) forms a pivot plane ( 10 ) between a fixed joint part ( 8 ) connected to the stand ( 2 ) and a pivotable joint part ( 9 ) connected to the lamp holder ( 3 ) such that the lamp holder ( 3 ) can be brought into different inclination positions with respect to the stand ( 2 ),
characterized ,
that the pivoting plane ( 10 ) is inclined at an acute angle to the longitudinal axis of the stand ( 2 ). 2. Lamp according to claim 1, characterized in that a power supply cable ( 11 ) is guided internally through the base ( 1 ), the stand ( 2 ), the pivot joint ( 7 ) and the lamp holder ( 3 ) to the lamp head ( 4 ). 3. Luminaire according to claim 1 or 2, characterized in that the angle is between 30° and 60°, preferably about 45°. 4. Lamp according to one of claims 1 to 3, characterized in that the joint parts ( 8 , 9 ) of the pivot joint ( 7 ) are each hemispherical and are joined together at their flat sides to form the pivot plane ( 10 ). 5. Lamp according to one of claims 1 to 4, characterized in that the joint parts ( 8 , 9 ) of the pivot joint ( 7 ) are connected to one another via a centrally arranged connecting screw or the like which runs transversely to the pivot plane ( 10 ). 6. Lamp, especially floor or table lamp,
with a stand ( 2 ), preferably rising from a base ( 1 ) or another base,
with a lamp holder ( 3 ) arranged on the head of the stand ( 2 ) and running approximately transversely to the stand ( 2 ) with a lamp head ( 4 ) arranged at one end and a handling handle ( 6 ) arranged at the other end and
with a swivel joint ( 7 ) at the head of the stand ( 2 ) on which the lamp holder ( 3 ) is pivotally mounted,
wherein the pivot joint ( 7 ) forms a pivot plane ( 10 ) between a fixed joint part ( 8 ) connected to the stand ( 2 ) and a pivotable joint part ( 9 ) connected to the lamp holder ( 3 ),
that the lamp holder ( 3 ) can be brought into different inclination positions with respect to the stand ( 2 ),
in particular according to one of claims 1 to 4,
characterized,
that the joint parts ( 8 , 9 ) of the swivel joint ( 7 ) are connected to one another by means of a screw connection ( 13 ) with a slight pitch which runs transversely to the swivel plane ( 10 ) and leaves a free space ( 12 ) inside the joint parts ( 8 ), ( 9 ). 7. Luminaire according to claim 6, characterized in that the dimension of the screw connection ( 13 ) is in the order of M 15 × 1. 8. Luminaire according to claim 6, characterized in that the dimension of the screw connection ( 13 ) is in the order of M 32 × 0.75. 9. Lamp, especially floor or table lamp,
with one, preferably from a stand ( 1 ) or another base
towering, stand ( 2 ),
with a lamp holder ( 3 ) arranged on the head of the stand ( 2 ) and running approximately transversely to the stand ( 2 ) with a lamp head ( 4 ) arranged at one end and a handling handle ( 6 ) arranged at the other end and
with a swivel joint ( 7 ) at the head of the stand ( 2 ) on which the lamp holder ( 3 ) is pivotally mounted,
wherein the pivot joint ( 7 ) forms a pivot plane ( 10 ) between a fixed joint part ( 8 ) connected to the stand ( 2 ) and a pivotable joint part ( 9 ) connected to the lamp holder ( 3 ) such that the lamp holder ( 3 ) can be brought into different inclination positions with respect to the stand ( 2 ),
in particular according to one of claims 1 to 8,
characterized,
that a pivot-inhibiting spring device is arranged between the joint parts ( 8 , 9 ). 10. Luminaire according to claim 9, characterized in that the spring device has a spring channel ( 20 ) and a wave spring ( 21 ) or the like arranged therein. 11. Luminaire according to claim 10, characterized in that the spring channel ( 20 ) is arranged radially outside the screw connection ( 13 ). 12. Luminaire according to claim 10, characterized in that the spring channel ( 20 ) is arranged radially inside the screw connection ( 13 ). 13. Lamp, especially floor or table lamp,
with a stand ( 2 ), preferably rising from a base ( 1 ) or another base,
with a lamp holder ( 3 ) arranged on the head of the stand ( 2 ) and running approximately transversely to the stand ( 2 ) with a lamp head ( 4 ) arranged at one end and a handling handle ( 6 ) arranged at the other end and
with a swivel joint ( 7 ) at the head of the stand ( 2 ) on which the lamp holder ( 3 ) is pivotally mounted,
wherein the pivot joint ( 7 ) forms a pivot plane ( 10 ) between a fixed joint part ( 8 ) connected to the stand ( 2 ) and a pivotable joint part ( 9 ) connected to the lamp holder ( 3 ) such that the lamp holder ( 3 ) can be brought into different inclination positions with respect to the stand ( 2 ),
in particular according to one of claims 1 to 13,
characterized,
that a pivot limiter is provided between the joint parts ( 8 , 9 ). 14. Lamp according to claim 13, characterized in that the pivot limiter has a grub screw ( 14 ) or the like arranged in a joint part ( 8 ) which engages in a pivot limiting groove ( 15 ) in the other joint part ( 9 ). 15. Lamp according to one of claims 1 to 14, characterized in that the fixed joint part ( 8 ) is mounted on the stand ( 2 ) so as to be pivotable about the longitudinal axis of the stand ( 2 ), preferably with limited pivoting. 16. Lamp, especially floor or table lamp,
with a stand ( 2 ), preferably rising from a base ( 1 ) or another base,
with a lamp holder ( 3 ) arranged on the head of the stand ( 2 ) and running approximately transversely to the stand ( 2 ) with a lamp head ( 4 ) arranged at one end and a handling handle ( 6 ) arranged at the other end and
with a swivel joint ( 7 ) at the head of the stand ( 2 ) on which the lamp holder ( 3 ) is pivotally mounted,
wherein the pivot joint ( 7 ) forms a pivot plane ( 10 ) between a fixed joint part ( 8 ) connected to the stand ( 2 ) and a pivotable joint part ( 9 ) connected to the lamp holder ( 3 ),
that the lamp holder ( 3 ) can be brought into different inclination positions with respect to the stand ( 2 ),
in particular according to one of claims 1 to 15,
characterized,
that the lamp holder ( 3 ) is mounted in the pivotable joint part ( 9 ) so as to be rotatable about its longitudinal axis, but not displaceable in the direction of the longitudinal axis, and that a rotation angle limitation is provided between the lamp holder ( 3 ) and the pivotable joint part ( 9 ). 17. Lamp according to claim 16, characterized in that a grub screw ( 16 ) or the like is arranged in the pivotable joint part ( 9 ), which in the assembled state engages in a groove on the outer circumference of the lamp holder ( 3 ), the groove only running over an angular range, so that the angle of rotation limitation results from this angular range. 18. Lamp according to claim 17, characterized in that the grub screw ( 16 ) or the like is arranged concealed in the pivotable joint part ( 9 ), in particular is accessible from the surface facing the other joint part ( 8 ). 19. Lamp according to claim 17, characterized in that a through-hole ( 18 ) is arranged in a concealed manner in the pivotable joint part ( 9 ), that an opening extending over a certain angular range on the circumference over a certain angular range is provided in the lamp holder ( 3 ) at a position corresponding to the position of the through-hole ( 18 ) in the assembled state, that a pivoting counterpart ( 19 ) carrying a threaded hole or the like is arranged in the interior of the lamp holder in the assembled state at the level of the opening and that in the pivoting counterpart ( 19 ) the grub screw ( 16 ) or the like is firmly inserted in the threaded hole or the like and projects radially outwards into the through-hole.