EP2976969B1 - Combination of a table and a luminaire - Google Patents

Description

The invention relates to the combination of a table with table frame and table top and at least one luminaire with variable luminous intensity, wherein the table top is designed to be variable in height, and wherein the light intensity of the lamp for illuminating the table top in dependence on their height position is set so that the illuminance on Location of the tabletop is substantially consistent.

In the case of tables with a table frame and tabletop, it is important, especially in connection with office workstations, to provide perfect lighting. In fact, the luminaire should ensure that the table top is illuminated as evenly as possible and that dazzling effects with regard to screens placed there are avoided. Alternatively or additionally, the luminaire is often also expected to have room lighting - in addition to the illumination of the table top.

In the prior art according to the DE 20 2010 011 170 U1 an LED-based lighting system is described, which has a modular structure. The familiar LED lighting system can be used, among other things, as workplace lighting in combination with a table with table frame and table top.

In addition to the known combination of the table and the lamp with variable light intensity and height adjustable office tables for particular screen workstations are known, as in the context of DE 10 2012 109 469 A1 will be described in detail. Such height-adjustable office tables are equipped with the general advantage that a user can adjust the height of the table top to his individual needs and changing ergonomic Can adapt to requirements. So both a sedentary and a stationary operation are possible. This has proven itself overall.

In a generic combination of a table with table frame and table top and at least one lamp according to the DE 20 2012 010 025 U1 The procedure is such that the illuminance is or can be regulated in individual dependence on the height of the workstation. As a result, the working surface of a workstation at any height between minimum and maximum work height is always illuminated with the same and pre-set illuminance. Details on the workplace lamp and its mounting or attachment remain open.

In the closest prior art after the FR 2 532 830 A1 already the combination of a table with table frame and table top and a lamp is described and illustrated. The table top is designed to be height adjustable. The lamp is connected to the table frame. The table frame consists of at least two each predominantly vertically oriented table columns and associated feet together. In addition, the lamp is connected to a post.

As part of the pre-publication DE 20 2012 010 025 U1 a work lamp is described, whose illuminance can be regulated in individual dependence on the height of the workstation. As a result, the working surface of the workplace can always be illuminated with the same and pre-set illuminance at any workplace height.

So far, therefore, conclusive concepts are lacking, with a combination of the table and the at least one lamp with variable light intensity duly take into account the different height positions of the table top to wear. Usually, at this point, for example, worked with a ceiling lighting, which may provide sufficient illumination in a standing operation and in the highest position located table top. However, if the tabletop is in its lowest or near the lowest position in a sedentary activity, the illumination or illuminance is often not sufficient. Here, the invention aims to provide a total remedy.

The invention is based on the technical problem of further developing such a combination of a table and at least one luminaire with variable luminous intensity so that the illumination and the arrangement of the tabletop are optimized. To solve this technical problem, a combination of a table with table frame and table top and at least one luminaire with variable luminous intensity with the features of claim 1 is provided. According to an advantageous embodiment, the lamp is arranged stationarily above the table top. In addition, the two table columns can be coupled together via a connecting strut. The table column for receiving the foot of the lamp is arranged substantially parallel to the adjacent table column of the table frame. The two table columns coupled together via the connecting strut define the table frame. Telescoping guide rails, which carry the height-adjustable table top, are respectively received in the two table columns.

In the context of the invention, it is first of all a special combination of a table and in particular a desk and at least one lamp with variable light intensity. That is, the table or office table and the lamp in question form a unit. In most cases, even at this point a unit is preferred, in which the lamp is connected to the table.

In any case, the lamp ensures the illumination of the table top. Since the table top is designed to be variable in height, it depends on the invention to control the different height positions of the table top lighting technology. For this purpose, the invention proposes that the light intensity for the illumination of the table top is set substantially constant, regardless of the height position of the table top.

This ultimately results in that the luminous intensity of the lamp is reduced, for example, in the highest position table top compared to the case that the table top is in its lowest position. That is, in the highest position of the table top is worked with low light intensity of the lamp. In the lowest position of the tabletop, however, the light intensity is high. As a consequence of this, the illuminance at the location of the table top, that is to say the quotient of light intensity and the distance (to the square), can be set to be substantially constant. The illuminance generally refers to the specific light emission and is given as the quotient of the luminous intensity of a mostly punctiform light source and the square of the distance.

For example, since the light intensity is given in lumens (Lm), the illuminance is measured in lumens per square meter, which corresponds to the unit lux. Alternatively, the illuminance can also be measured in candela. In any case, the invention provides that the illuminance (measured in lux) of the lamp for illuminating the table top is set substantially constant at the location of the table top, regardless of the height position of the table top.

The bottom line is that the fixed and arranged above the table top light changes their distance from the table top, because the table top is designed to be variable in height. Depending on the height position of the table top, the luminous intensity of the luminaire is adjusted so that the illuminance at the location of the table top is substantially constant. That is, depending on the height position of the table top, the light intensity of the lamp is adjusted in each case, so that the illuminance at the location of the table top is substantially consistent and, of course, meets legal requirements. It is therefore to be expected with constant light conditions, regardless of whether the table top occupies its highest or lowest position. Here are the main benefits.

In order to implement the adaptation of the light intensity to the height position of the table top in detail, a sensor is provided as a rule to detect the height position of the table top and / or a distance of the lamp from the table top.

As already explained, the luminaire is usually placed in a stationary manner above the table top and connected in total to the table or the table frame. Since the table top can change its height position, consequently varies also the distance of the lamp from the table top. This distance is measured with the help of the sensor.

For this purpose, the sensor may, for example, be a displacement sensor which measures the travel of the table top relative to the stationary table frame. In principle, however, the luminaire can also be equipped with a distance sensor which measures the distance of the luminaire from the tabletop below it. In any case, the sensor is advantageously connected to a control unit for adjusting the light intensity of the lamp. If the distance between the luminaire and the table top decreases, the luminous intensity of the luminaire is regularly reduced. However, if the distance increases, the light intensity is increased accordingly.

In order to achieve the most uniform possible illumination of the table top with the help of the lamp, the lamp is usually equipped with a plurality of sources of illumination. These illumination sources are typically LEDs and in particular white light LEDs. Moreover, it has proven useful if the individual illumination sources are arranged in a planar manner and define, for example, a rectangular luminous area.

In addition, the illumination source is often still the radiation side of the illumination source equipped with a diffuse light scattering body. In this way, the white light emanating from the illumination sources diffuses diffusely and ensures a uniform light impression on the tabletop below. This light-scattering body can be equipped with openings through which the individual illumination sources emit essentially unhindered. The light emanating from the illumination sources and not emitted by the opening may additionally be emitted diffusely in this context.

In addition, the design is usually still made so that part of the diffused light is emitted to the rear, that is, away from the table top in the room. In this way, the light ensures that not only the table top is illuminated directly, but at the same time an indirect room lighting takes place.

As already explained, the lamp can be found fixed above the height-adjustable table top. The lamp is usually located above the center of the table top. To achieve this fixed placement in detail, the light is usually connected to a post.

The post is formed in two parts with one foot and a contrast arm angled. The foot of the post is taken up in a table pillar. In contrast, the lamp is connected to the angled arm end.

The foot is detachably inserted into the column and can be anchored in the column. In principle, the foot can also be anchored to the table pillar in different height positions. As a result, the light can be changed in their position above the table top and easily adapted to the particular circumstances. The luminaire can therefore be fixed above the table top. In addition, a variable position of the light above the table top is possible.

As already described, the table frame for the height-adjustable table regularly consists of two table columns, which are interconnected. Inside the respectively usually vertically arranged table columns can each telescope guide rails, which in turn carry the table top, such as this in detail in the introductory already described DE 10 012 109 469 A1 is treated.

As a result, the combination of a table with table frame and table top and at least one luminaire with variable light intensity is provided, which for the first time consistently consistent lighting conditions at the location of the height-adjustable table top is available. That is, an operator encounters consistent lighting conditions, regardless of whether the tabletop is in its highest or lowest position. As a result, special ergonomic advantages are achieved and is expressly counteracted fatigue in the workplace.

In addition, the attachment of the lamp to the table frame ensures defined conditions. In fact, in this way it can be ensured that the luminaire is arranged, for example, centrally above the table top and maintains its position. This applies both in the event that the lamp is placed stationary above the table top as well as when the lamp undergoes a change in height above the table top.

The lamp itself is taken up with her foot in a table column, which can be a table column of the table frame. In general, however, a separate - third - table column is realized. As a result, the lamp can be set to save space on the table frame, because the table column for receiving her foot and the adjacent table column of the table frame can be connected together. As a result, the foot can be integrated into the table and may pass through an opening in the tabletop. As a result, a compact and shapely structure is achieved.

Here are the main benefits.

Fig. 1 und 2

die erfindungsgemäße Kombination in verschiedenen Ansichten, teilweise perspektivisch.

In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment; show it:

Fig. 1 and 2

the combination of the invention in different views, partially in perspective.

In the figures, a combination of a table 1 and a lamp 2 is shown. The luminaire 2 is arranged stationarily above a table top 3. For this purpose, the lamp 2 is connected to a table frame 4, 5, 6. The table frame 4, 5, 6 is composed of two respectively predominantly vertically oriented table columns 4 and associated feet 5 together. The two table columns 4 of the table frame 4, 5, 6 are coupled to each other via a connecting strut 6.

In addition, another third pillar column 4 on one side of the table frame 4, 5, 6 is added, as the figures make clear. The third pillar column 4 extends predominantly parallel to the adjacent pillar column 4 of the table frame 4, 5, 6. Both mutually parallel and adjacent pillars 4 use a common foot 5. In addition, both pillars 4 are coupled together by, for example, cross struts, as shown by FIGS. 1 and 2 becomes clear.

In the two table columns 4 of the table frame 4, 5, 6 telescoping guide rails 7 are added, which carry the height-adjustable table top 3. The setting of the different and shown in the figures height positions of the table top 3 may be made as in the DE 10 2012 104 469 A1 the applicant is described in detail. That is, with Help a spring element, the table top 3 is biased and fixed by resorting to an additional brake manually in the desired height position. This is basically known.

The luminaire 2 has a variable light intensity (measured in lumens). In this way, the light emission or light intensity can be changed at the location of the table top 3. For in fact the luminaire 2 is arranged in a stationary manner above the height-adjustable tabletop 3. In most cases, the lamp 2 is located above or in the region of a center of the table top. 3

The luminous intensity of the luminaire 2 for illuminating the tabletop 3 is now set as a function of the height position of the tabletop 3 so that the illuminance at the location of the tabletop 3 is substantially constant. That is, the illuminance at the location of the table top 3 is approximately constant, both when the table top 3 is in its highest position (shown on the left) and when the lowest position is occupied (shown on the right). As a result, constant light conditions at the location of the table top 3 are achieved, regardless of their height position relative to the table frame 4, 5, 6.

Since the table top 3 in its highest position a small distance A compared to the overlying lamp 2 has compared to the situation when the table top 3 assumes its lowest position, the light intensity of the lamp 2 must be adjusted. The luminous intensity of the luminaire 2 tends to be lower in the highest position than in the lowest position because the luminous intensity represents the quotient of the luminous intensity and the square of the distance. If, for example, the distance A is doubled, the luminous intensity must be set four times greater in order to keep the illuminance at the location of the tabletop 3 constant.

In order to be able to vary the luminous intensity of the luminaire 2 accordingly and to set the resulting illuminance at the location of the tabletop 2 essentially uniformly, a sensor 8 is additionally provided. With the help of the sensor 8 in or on the lamp 2, the distance A of the lamp 2 is detected by the table top 3. The sensor 8 may be a distance sensor based on ultrasound and / or laser, for example.

The sensor 8 in question is connected to a merely indicated control unit 9. With the help of the control unit 9, the light intensity of the lamp 2 is changed. In fact, the lamp 2 is connected to a post 10, 11. The post 10, 11 is formed in two parts with a foot 10 and an arm 11 developed in contrast thereto.

The foot 10 of the post 10, 11 is received in the third column 4 of the table. In contrast, the angled arm 11 carries the end of the lamp 2. Inside the post 10, 11, the already mentioned control unit 9 may be arranged protected. The sensor 8 is connected via a running in the interior of the post 10, 11 connecting line to the control unit 9, so that any damage to the sensor 8 as well as the control unit 9 and its connection line can be de facto excluded. In addition, a particularly appealing appearance is provided.

The luminaire 2 itself is usually equipped with a plurality of illumination sources. In this case, the illumination sources are arranged flat. In fact, the plurality of illumination sources define a rectangular luminous surface 12. In addition, a diffusely light-scattering body may be provided on the radiation side of the individual illumination sources. The light 2 provides not only for a direct illumination of the table top 3, but can additionally also generate light emitted indirectly in the room. Of course, this is only an example and is not mandatory. It can be seen that the post 10, 11 is received for the lamp 2 in the third column table 4. In this case, the post 10, 11 can basically change in height. In addition one recognizes by the enlarged representation in the FIG. 1 in that the post 10 passes through the table top 3, taking into account an opening 13 in the table top 3. The opening 13 may be equipped with a seal relative to the post 10. In addition, the post 10 passes through the edge of the table top 3 in vertical extension of the third column 4, which receives the post 10 in its interior.

Overall, the lamp 2 is initially aligned relative to the table top 3 roughly in their distance A above the table top 3 and fixed in place. As a result, an adaptation to different table racks 4, 5, 6, different table tops 3, room conditions, etc. possible.

If now the table top 3 is changed in its height position and consequently also the distance A to the luminaire 2, this change of the distance A is measured with the aid of the sensor 8. This sensor 8 outputs the corresponding values to the control unit 9, which as a result thereof activates the individual illumination sources of the luminaire 2 in such a way that the luminous intensity of the luminaire 2 is changed. If the table top 3 is in its highest position, the light intensity of the light 2 is reduced. On the other hand, if the tabletop 3 wanders to its lowest position, the luminous intensity of the luminaire 2 is increased.

In any case, the invention ensures that the illuminance, ie the quotient of the light intensity and the square of the distance A, in the range the table top 3 is set substantially constant. This is to be expected in a standing as well as sedentary activity with constant lighting conditions and thus any signs of fatigue of the operating personnel is prevented.

Claims (9)

1. A combination of a table (1) with a table frame (4, 5, 6) and a table top (3), together with at least one lamp (2) with a variable light intensity, wherein

   - the table top (3) is designed to be variable in height, and wherein

   - the lamp (3) is connected to the table frame (4, 5, 6), wherein

   - the table frame (4, 5, 6) is composed of at least two table columns (4), in each case predominantly vertically oriented, and related feet (5), and wherein

   - the lamp (2) is connected to an upright (10, 11), the foot (10) of which is accommodated in a table column (4),

   characterised in that,

   - the light intensity of the lamp (2) for purposes of illuminating the table top (3) is adjusted as a function of its height position, such that the illumination intensity at the location of the table top (3) remains essentially the same, and in that

   - the upright (10) passes through the table top (3), in particular taking account of an opening (13) in the table top (3).
2. The combination according to claim 1, characterised in that, the lamp (2) is arranged to be fixed in position above the table top (3).
3. The combination according to claim 1 or 2, characterised in that, a sensor (8) is provided in order to detect the height position of the table top (3), and/or a distance (A) between the lamp (2) and the table top (3).
4. The combination according to claim 3, characterised in that, the sensor (8) is connected to a control unit (9) for purposes of adjusting the light intensity of the lamp (2).
5. The combination according to one of the claims 1 to 4, characterised in that, the lamp (2) is equipped with a multiplicity of illumination sources.
6. The combination according to claim 5, characterised in that, the illumination sources are arranged two-dimensionally, and define, for example, a rectangular lamp surface (12).
7. The combination according to claim 5 or 6, characterised in that, a diffuse light scattering body is provided on the emission side of the illumination sources.
8. The combination according to one of the claims 1 to 7, characterised in that, the upright (10, 11) is designed in two parts, with the foot (10), and an arm (11) that is angled with respect to the latter.
9. The combination according to claim 8, characterised in that, the table column (4) is arranged for purposes of accommodating the foot (10), parallel to a further table column (4), which accommodates a guide bar (7) that telescopes within the latter.

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