WO2007087947A1

WO2007087947A1 - Elongate luminaire with end regions which are tapered in cross section

Info

Publication number: WO2007087947A1
Application number: PCT/EP2007/000041
Authority: WO
Inventors: Wolfgang Gadner; Bernd Walser; Patrik Gassner
Original assignee: Zumtobel Lighting Gmbh
Priority date: 2006-02-01
Filing date: 2007-01-04
Publication date: 2007-08-09
Also published as: EP1979670A1; CN101371072B; CN101371072A; EP1979670B1; DE102006004580A1; KR101398803B1; KR20080099242A

Abstract

Luminaire (1), in particular damp-proof luminaire, having an elongate, trough-shaped housing (2), terminals arranged therein for at least one lamp (6), a transparent cover (4) covering the opening of the housing (2) and longitudinally extending fiberoptic ribs (23), which are preferably provided, in the cover (4). In order to broaden the possibilities in design terms of the cover (4), at least one cross-sectional dimension (B, T) of the cover (4) is reduced from its longitudinal center or a point in a longitudinal center region (L2) towards the respectively associated end region of the cover (4).

Description

Elongated luminaire with tapered end sections

The invention relates to a luminaire according to the preamble of claim 1.

A lamp of this type is formed with a two-part housing, of which one part is a trough-shaped housing, the fastening elements for attachment to a support, for. As a wall or a ceiling, and the other part is formed by an at least partially transparent cover, which is releasably connected by closure elements with the trough-shaped housing. In the lamp housing formed by the trough-shaped housing and the cover, a lamp can be mechanically and electrically connected, the radiated during operation light emits through the transparent cover for room lighting. In this prior art lamp, the side walls of the housing and / or the cover or the wall of the cover extend in the region of their ridge profile-like parallel to the longitudinal direction of the lamp.

A lamp of this type is z. As described in EP 0 785 391 A1. In this prior art luminaire are used to attach the cover to the trough-shaped housing in principle C-shaped closure elements, which are formed as separate components, and of which engages an end portion of the C-shape with a locking leg in a bag-shaped undercut on the trough-shaped housing, over the Dividing joint between the trough-shaped housing and the cover extends beyond and engages with its other end portion of the C-shape edge of the cover with a tensile stress and thereby compresses the trough-shaped housing and the cover with an elastic clamping voltage.

A present luminaire is a typical mass product, on the one hand intended to reduce the wall thicknesses to a required minimum in order to save a material and the other weight. However, in particular with an elongated luminaire, care must be taken to ensure that sufficient stability, in particular of the cover but also of the trough-shaped housing, is achieved. On the other hand, a design, statically and functionally favorable form of the luminaire is desired.

The invention is therefore based on the object in a luminaire of the type specified to expand the design possibilities of the shape of the lamp. Furthermore, it is desirable to stabilize at least the cover and preferably also the housing.

This object is solved by the features of claim 1. Advantageous developments of the invention are described in the subclaims.

In the luminaire according to the invention, the cover and preferably also the housing are cambered, such that they have larger cross-sectional dimensions in their central region than in their end regions. As a result, the cover, and preferably also the housing, receives in each case a cross-sectional size extending over a large part of its length, which deviates from a profiled shape and tapers from the central longitudinal region to the associated end regions. In this way, the cover and preferably also the housing both in terms of the required space and functionally, in particular taking into account on the one hand the heat generated in operation in the lamp and on the other with respect to the panel of the lamp a favorable shape. In addition, the cover and preferably the housing is substantially stabilized. Therefore, the inventive design makes it possible either to stabilize the lamp or the cover or to reduce the wall of the housing and / or the cover with a sufficient stability, so that material and / or weight can be saved.

The inventive design results in a simple and inexpensive producible form for the housing and / or the cover.

The shape profile deviating from a profile shape according to the invention can be achieved both when the dimension or width of the housing and / or the cover extending substantially parallel to the dividing or opening plane decreases continuously from the middle region to the ends and / / or the dimension or depth extending substantially perpendicular to the split plane decreases continuously from the middle region to the ends. A particularly advantageous form results when the dimension extending substantially parallel to the split or opening plane decreases more than the dimension substantially perpendicular to the split plane.

It is also known in a luminaire of the present type, to be arranged on the inner lateral surface of the cover longitudinally extending Lichtleitrippen. This per se known embodiment is particularly well suited in combination with the embodiment according to the invention, because it leads to a further stabilization of the lamp or the housing and the cover.

It is further advantageous to form the light guide ribs so that over the length of the lamp or cover, a substantially same photometric effect is achieved. This can be achieved if the light guide ribs z. B. extend along the lamp extending and angularly offset planes, which are all in a straight and also longitudinal common cut line.

Moreover, the Lichtleitrippen may have different cross-sectional shapes to z. B. in lateral and lower-side peripheral areas to achieve a different light emission.

Further development features of the invention lead to advantageous closure devices for mounting the cover on the housing and the rest also to simple configurations that are excellent for a lamp of the type specified and also allow a simple and inexpensive producible form for the housing and the cover.

Below advantageous embodiments of the invention and achievable by them advantages are explained in more detail with reference to exemplary embodiments. It shows

1 shows a lamp according to the invention in a side view.

Figure 2 shows the lamp in the bottom view.

3 shows a cover of the luminaire in a perspective plan view; Fig. 4, the left half of the lamp in vertical cross section and in enlarged

Presentation;

FIG. 5 shows the central cross-section V-V of the cover in FIG. 2; FIG.

FIG. 6 shows the cross-section VI-VI of the cover in FIG. 2; FIG.

Fig. 7 shows the cover in perspective cross-section.

The main parts of the luminaire designated in FIG. 1 in their entirety by 1 are a wart-shaped housing 2, a cover 4 releasably connected thereto by a plurality of closure devices 3 distributed around the circumference, and a cover 4 in the cavity 5 between the wart-shaped housing 2 and the cover 4 arranged lamp 6, which is connected to at least one mechanical and electrical connection element and held. The cover 4 is dome-shaped. Their wall 4a thus extends in cross-section arcuate or U-shaped.

In the embodiment, it is a wet room light, which meets in this regard special protection requirements, eg. B. against the ingress of splashing u. a. in the

Area of the dividing joint 7 between the wart-shaped housing 2 and the cover 4, is splash-proof. This protection can be formed in the region of the dividing joint 7 by comb-like intermeshing webs 8a, 8b, 8c extending circumferentially in the circumferential direction, which form a labyrinth which provides protection against the penetration of sprayed water. (Fig. 4).

In the exemplary embodiment, the trough-shaped housing wall 2 a branches in its free edge region to two wall webs 8 a, 8 b, which have a transverse distance from one another, which is larger than a wall web 8 c enclosing the wall webs 8 a, 8 b with a transverse spacing, which transverse to the parting line 7 of the z. B. opposite trough-shaped or dome-shaped cover wall 4a protrudes.

The division joint 7 is preferably sealed in addition to the labyrinth by a ring seal having a sealing ring D, the z. B. in the reason between the wall webs 8a, 8b existing circumferential groove 2b is arranged, and presses against the wall web 8c. The sealing ring D is made of soft elastic material, for. B. from a foam tape.

The outer wall web 8b of the housing wall 2a is part of a widening step 9 in the free edge region of the housing wall 2a.

The housing wall 2a has on its a carrier, for. As a ceiling or wall of a room, facing investment side 1 1 fasteners 12, which serve the attachment to the carrier. In the exemplary embodiment, the lamp 1 has an elongated and straight-extending shape whose length Ll is a multiple of its width B. Accordingly, the trough-shaped housing 2 and the cover 4 are formed. This consists at least in their housing 2 remote from the dome area or the embodiment of a total of a transparent material, for. As glass or plastic, through which the light of the lamp 6 in the main emission direction S but also radiates to the sides. The housing 2 is made of plastic, in particular of a thermosetting plastic.

The majority of the existing closure devices 3 are arranged and formed mirror-inverted relative to one another or on both sides. It is therefore sufficient if only one closure device 3 is described below in each case.

In all embodiments, the closure device 3 has a closure element 3a in a generally C-shaped longitudinal cross-sectional shape, whose end portions are designated 3b, 3c, which engages behind the trough-shaped housing 2 with its upper end portion 3b and at the same time into a recess, in particular a pocket 13, engages in the housing 2, which is open to the dividing joint 7 side facing away. The pocket 13 has two mutually opposite pocket walls 13a, 13b, which extend approximately parallel to the longitudinal center plane 15 and is adapted to the cross-sectional size of the end portion 3b with play or taking into account a clamping action. The recess or pocket 13 may extend in the longitudinal direction of the lamp 1 in each case only to a portion or continuously.

The closure element 3a extends from the end portion 3b substantially in a matched to the associated outer shape of the housing 2 form the outside of the lamp housing to the cover 4 out, where it extends beyond the dividing joint 7 and out with the associated end portion 3c a widening step 10 engages behind the cover 4, optionally engages in a recess 10a formed thereon. The latter is carried out with an angled or curved inwardly extending, the end portion 3c forming Hintergreifschenkel 3d, which is secured by a securing device 14 in its engaged position.

The securing device 14 can be formed thereby; that the Hintergreifschenkel 3d is biased obliquely inwardly against the widening shoulder 10 with respect to the transversely or perpendicular to the dividing joint 7 extending longitudinal median plane 15 of the lamp 1, so that this tension pulls him inward and not outward. This is achieved in that the rear grip of the end portion 3c is arranged at a distance a from the longitudinal center plane 15, which is greater than the distance b of the rear grip of the end portion 3b of the longitudinal center plane 15. This results from the elastically bent state with a elastic clamping voltage applied to the widening step 10 Hintergreifschenkel 3d a clamping force 16 whose effective direction includes an acute angle Wl with the longitudinal center plane 15. This clamping force can be based on an elastic bending of the end region 3b and / or the end region 3c and / or the shape of the closure element 3a following the widening step 9 with respect to the step shape.

The closure element 3a is formed by a web 3e extending flat over its entire length, the thickness of which is denoted by d.

The hook-shaped to the free end portion 3c projecting end portion 3b of the closure element 3a is locked by a locking device 17 in the pocket 13 against accidental withdrawal and thus loosening. Such locking may be based on different efficiencies, e.g. on clamping action.

The cover 4, and preferably also the housing 2, each have a convex cross-sectional shape which is visible in a viewing direction transverse to the longitudinal direction. This may be a cigar-shaped form. In such a shape, the cross-sectional size of the lamp 1 or the cross-sectional size of the housing 2 and / or the cover 4 decreases continuously from the longitudinal center or a point in a central longitudinal region to the respectively associated free end region. In this case, the substantially parallel to the plane of the opening 4b of the housing 2 and / or the cover 4 extending Width B continuously decrease from the central region to the free end regions, as can be seen in particular from Fig. 2, 3, 6 and 7.

In addition, the depth T extending at right angles to the plane of the opening 4b of the housing 2 and / or the cover 4 may be continuously reduced from the central area to the respectively associated free end area of the cover 4. However, in the context of the invention, this depth T can also be the same size at least in the central longitudinal region L2 of the cover 4 or of the housing 2, as shown in FIG. In such an embodiment, the longitudinal crest line 4c of the cover 4 extends substantially straight at least in the longitudinal region L2. However, even in the region of the apex line 4c, the cross-sectional size or depth of the housing and / or the cover can be reduced from the longitudinal center or a point in a central end region to the respectively associated end region.

Thus, the side walls 2a, 4a of the housing 2 and / or the cover 4 are bulged laterally over substantially the entire length L1 or outside a central longitudinal region of the luminaire 1, so that the width B starts from the longitudinal center or from one point in the central longitudinal region L2 to the respective associated end portion of the housing 2 and / or cover 4 continuously reduced towards.

However, in the region of the apex line 4c, the wall 4a may also extend as a whole or at least in the longitudinal region L2 straight and substantially parallel to the contact side 11, so that the depth T of the luminaire 1 or the cover 4 substantially over at least the central longitudinal region L2 Whole length Ll is the same, apart from the curves at the ends of the lamp 1 and the cover. 4

In the luminaire 1 according to the invention thus the contact side 11 is formed so that it is flat overall or that at least the majority of the existing contact points lie in a plane.

The convergence of the width B of the housing 2 and / or the cover 4 and the convergence of the depth T of the cover 4 may be the same or different. In the embodiment, the convergence of the width B is greater than the convergence of the depth TD h., The width B decreases towards the free end more than the depth T. This can be particularly in the Figs. 1 and 6 recognize, the latter shows the section VI-VI in Fig. 2. Specifically, in Fig. 6 showing the cross section taken between the longitudinal portions L2 and L3, the width convergence shows due to the difference between the average width B and the width B 1 reduced in section.

It can also be seen from FIGS. 1 and 6 that the already mentioned convergence of the width B or B 1 is greater than the convergence of the depth T. This can be seen from the fact that the longitudinal longitudinal line 4c in the section VI-VI and in the Longitudinal center (section VV) extends straight (Fig. 1) or according to Fig. 6 in a point behind one another.

The cover 4 forms a light-guiding element that the light emitted by the lamp 6 and a reflector R located above and held on the housing 2 in the environment of the cover 4, i. into the room to be illuminated, into it. In the embodiment according to the invention, the aim is to form the cover 4 such that in the presence of the lateral bulges 21 and the bulge 22 on the apex line 4c, the photometric effect is substantially equal over substantially the entire length Ll or L3 substantially. It is desirable that at any point over the length of the bulges 21, 22, the substantially same lighting effect is achieved.

In order to obtain a different light distribution in the transverse direction or to illuminate lateral and lower-side areas of the cover 4 differently, it is known to form the wall 4a of the cover 4 with longitudinally extending light guide ribs or light guide ribs 23 which illuminate the light to at least one Steer the zone.

In the exemplary embodiment, a central illumination zone Wl arranged in the ridge region of the cover 4 and two illumination zones W2 adjoining on both sides are present, which extend approximately to the edge of the wall 4a of the cover 4 and are each delimited by an angular range.

In the exemplary embodiment, ribs 23 which are arranged directly next to one another and are triangular in cross-section are also provided, whose lamp 6 or light-coupling surfaces 23a, 23b facing the plane of the opening 4b are flat surfaces. The angles of the coupling surfaces 23 a, 23 b are mirror-symmetrical on both sides of the vertical longitudinal center plane of the lamp 1 and cover 4 and arranged so that in the Lighting zones Wl, W2 the desired light control and light emission is achieved in the room to be illuminated. The row of the light guide ribs 23 extends approximately to the free edge of the wall 4a, which lies in a plane E, which is arranged in the mounted state approximately in the plane of the opening 4b of the housing 2.

In contrast, the ribs 23 in the longitudinal direction of the lamp 1 and the cover 4 are formed so that an equal lighting effect over the length of the wall 4a or in the region of the end walls 4d is achieved.

The width e and preferably also the height h of the preferably directly juxtaposed ribs 23 tapers towards the opposite ends of the cover 4, preferably in the ratio of the respective existing convergence of the respective cross-sectional dimension of the dome-shaped cover 4. The ribs 23 are located in relation to one another angle offset planes El, all of which intersect in a longitudinal line 24, which is located in the region between the central axis of the lamp 6 and the associated electrical and mechanical connection means and the edge plane E, preferably in the edge plane E.

The ribs 23 can extend into the end walls 4d of the cover 4, as shown in FIGS. 3 and 7, or the ribs 23 can each end in the transition region to the end walls 4b, as shown in the section in FIG. In Fig. 7, the longitudinal edges of the ribs 23 are not shown for reasons of simplification in the left half of the figure.

The positions of the closure devices 3 and the webs 3e of the closure elements 3a are adapted to the bulge 21 and bulged outside, so that their visible in Fig. 2 center axes each include an acute angle W3 between them.

Claims

claims

1. lamp (1), in particular moisture-proof, with

an elongated trough-shaped housing (2),

- arranged therein connections for at least one lamp (6),

- One of the opening of the housing (2) covering transparent cover (4) - and preferably present, longitudinally extending Lichtleitrippen (23) in the

Cover (4), characterized in that at least one cross-sectional dimension of the cover (4) from the longitudinal center or a location nearest the longitudinal center continuously decreases towards both end regions or towards the closer end region of the cover (4).

2. Lamp according to claim 1, characterized in that the width (B) of the cover (4) of the longitudinal center or a location nearest the longitudinal center continuously reduced to both end regions or to the nearer end portion of the cover (4) ,

3. Lamp according to claim 1 or 2, characterized in that the depth (T) of the cover (4) from the longitudinal center or a location nearest the longitudinal center point to both end regions or to the nearer end portion of the cover (4) continuously reduced.

4. Luminaire according to one of the preceding claims, characterized in that a parallel to the opening plane (E) of the cover (4) extending cross-sectional dimension (B) is reduced more than a transverse to the opening plane (E) extending cross-sectional dimension (T).

5. Lamp according to one of the preceding claims, characterized in that the dome-shaped wall (4a) of the cover (4) rounded in their end regions in transversely extending end walls (4d) passes.

6. Luminaire according to one of the preceding claims, characterized in that the housing (2) at least in the region of its opening (4b) has a width (B) extending from the longitudinal center or a location nearest the longitudinal center to both end regions or is continuously reduced toward the nearer end portion of the housing (2), preferably decreases according to the width (B) of the cover (4).

7. Luminaire according to one of the preceding claims, wherein in the cover (4) longitudinally extending Lichtleitrippen (23) are arranged, characterized in that the Lichtleitrippen (23) extending along the cover (4) planes (El), which are angularly offset and meet in a common, longitudinal longitudinal straight line (24).

8. Lamp according to claim 7, characterized in that the longitudinal line (24) extends approximately in the separation plane (E) between the housing (2) and the cover (4).

9. Lamp according to claim 7 or 8, characterized in that in the circumferential direction of the cover (4) extending width (e) of the Lichtleitrippen (23) or also the height (h) to the ends of the cover (4) out reduced in accordance with the cross-sectional reduction of the cover (4) in the associated plane (El).

10. Luminaire according to one of the preceding claims 5 to 9, characterized in that the light guide ribs (23) terminate in the end regions of the dome-shaped wall (4a) of the cover (4) or extend into the end walls (4d).

11. Luminaire according to one of the preceding claims 7 to 10, characterized in that the light guide ribs (23) each have a triangular cross-sectional shape.