SAFETY OR ESCAPE SIGN LIGHT

Description

[0001] The invention relates to a safety or escape sign luminaire, in particular for an emergency lighting system, with a display, with at least one first illuminant, in particular with at least one LED, with a light-conducting plate optically connected to the first illuminant for backlighting the display and with an outer frame which is connected to at least one narrow side of the light-conducting plate.

[0002] DE202009001048U1 discloses a safety or escape sign luminaire whose light-conducting plate, for backlighting the luminaire's display, is clamped between two frame components of a surrounding outer frame. Furthermore, the outer frame is designed to support lamps on one long side, which are optically connected to the light-conducting plate, and on the opposite long side, mounting devices for attaching the luminaire. The outer frame therefore has a stability-providing function for the luminaire, which requires a mechanically rigid design of the outer frame to guarantee the luminaire's stability. Achieving this objective prevents a slim design of the outer frame, which, due to the standardized large display area, leads to comparatively large external dimensions for the safety or escape sign luminaire.KR 101 657 968 ​​B1 discloses a safety luminaire to be installed in the ground with an outer frame in which the electronics, display, light guide plate and lighting element are mounted in a watertight manner.

[0003] The invention therefore has the task of creating a safety or escape sign luminaire which can satisfy the smallest external dimensions while being highly stable.

[0004] The invention solves the problem by the features of claim 1.

[0005] If the outer frame and light-guiding plate are connected via at least one snap connection, this mechanical connection can reduce the structural requirements for the outer frame's mechanical load-bearing capacity. This snap connection allows the light-guiding plate to be incorporated as a support for the luminaire, thus guaranteeing the stability known from other solid luminaires despite the slim outer frame design. This is all the more so because the outer frame forms an elastic spring element, and the light-guiding plate forms a rigid undercut on its narrow side that accommodates the spring element. The spring element and undercut work together to form this snap connection.The rigid undercut on the plate allows it to be designed to be comparatively mechanically rigid, which increases the torsional rigidity of the luminaire and therefore guarantees high stability even with comparatively large displays.

[0006] The effort required to create an undercut on the light-guiding plate can be reduced if the undercut is formed by a recess in the light-guiding plate, which recess runs from a first broad side of the light-guiding plate to the opposite second broad side of the light-guiding plate. Furthermore, such a recess penetrating the plate can accommodate dimensional tolerances on the spring element, improving the connection between the outer frame and the plate.

[0007] The spring element preferably has a dovetail or mushroom-shaped cross-section to compensate for dimensional tolerances in the snap connection. This shape can also ensure a mechanically resilient connection between the outer frame and the panel.

[0008] High dimensional accuracy of the safety or escape sign luminaire can be guaranteed if the outer frame has several centering projections between which the light-conducting plate protrudes.

[0009] In addition, the centering projections can prevent the elastic spring element from being pushed out sideways from the undercut and thus prevent the snap connection from opening, in that the centering projections limit, in particular block, the lateral mobility of the light-conducting plate.

[0010] Preferably, the first illuminant is optically connected to a first narrow side of the light-conducting plate in order to avoid any disruptive influences of the snap connections on the optical connection.

[0011] The outer frame, which would otherwise be snapped to the plate, can be secured by connecting the first narrow side of the light-conducting plate to the outer frame via a cross-pin connection. Furthermore, a cross-pin connection enables a comparatively easy assembly of the safety or escape sign luminaire, which can further reduce manufacturing costs.

[0012] The stability of the positive connection can be further improved if a pin, especially an L-shaped one, is locked in the cross-pin connection by a press fit.

[0013] High mechanical stability of the safety or escape sign luminaire can be achieved if the outer frame encloses the light-conducting plate on the narrow sides.

[0014] This mechanical stability can be further increased if snap connections connect the second, third and fourth narrow sides of the light-conducting plate to the outer frame.

[0015] The safety or escape sign luminaire can also be used for illuminating the surrounding area, preferably also the floor, in particular in a variably adjustable manner. For this purpose, the safety or escape sign luminaire has a lens body with a plurality of first optical lenses, at least one second illuminant, in particular at least one LED, which is optically connected to the lens body, and a linear guide, wherein the outer frame supports the lens body and the linear guide movably mounts the second illuminant relative to the lens body. Due to this movable mounting, it is thus possible, as needed, to optically couple the lens to the illuminant that corresponds to the required lighting. This lighting can be changed even when the safety or escape sign luminaire is installed, which considerably simplifies its handling.

[0016] Preferably, the linear guide is attached to the outer frame in order to be able to optically connect the light source to the optical lens with minimal play.

[0017] In addition, the light-conducting plate can have a second optical lens, which lens is optically connected to the third end face of the light-conducting plate for coupling out light in order to be able to additionally illuminate the surroundings.

[0018] Preferably, the second optical lens has a W-shaped contour in cross-section in order to ensure limited illumination.

[0019] Preferably, the safety or escape sign luminaire has at least one mounting bracket which is fastened to the outer frame, which can further facilitate the installation of the safety or escape sign luminaire.

[0020] The mounting bracket is arranged on the outer frame in the area of ​​the first narrow side of the light-conducting plate, which, in conjunction with the cross-pin connection also provided there, creates a high level of mechanical stability for the safety or escape sign luminaire.

[0021] Two mounting brackets, each provided in a corner area of ​​the outer frame, can further facilitate installation but can also absorb comparatively high loads.

[0022] If the light-conducting plate is recessed in the two corner areas, this can create space for differently designed mounting brackets. For this purpose, receptacles for the mounting bracket's fastening elements are formed between the outer frame and the light-conducting plate. These recesses preferably taper from the mounting bracket.

[0023] The safety or escape sign luminaire is preferably suitable for an emergency lighting system.

[0024] The figures show, for example, the subject matter of the invention in more detail using an exemplary embodiment. Fig. 1a side view of a safety or escape sign luminaire, Fig. 2a sectional view according to II-II of the Fig. 1 safety or escape sign luminaire shown, Fig. 3 a detailed view of a snap connection of the Fig. 1 safety or escape sign luminaire shown, Fig. 4 a detailed view of centering projections of the Fig. 1 safety or escape sign luminaire shown, Fig. 5 a detailed view of a cross pin connection of the Fig. 1 illustrated safety or escape sign luminaire, Fig. 6a a sectional view according to VI-VI of the Fig. 1 to a lens body, Fig. 6b a top view of the Fig. 6a shown lens body and Fig. 7 a sectional view according to VII-VII of the Fig. 1 to a second optical lens.

[0025] After Fig. 1 For example, a safety or escape sign luminaire 1 is shown, which is used in an emergency lighting system not shown in detail.

[0026] This safety or escape sign luminaire 1 has a backlit display 2 in which the information to be displayed can be either fixed or variable.

[0027] For backlighting the display, the safety or escape sign luminaire 1 has a first illuminant 3, namely several first LEDs arranged one after the other, and a light-conducting plate 4.

[0028] The first illuminant 3 is optically connected to a first narrow side 4.1 of the light-conducting plate 4.

[0029] The safety or escape sign luminaire 1 is also enclosed by an outer frame 5 which is connected to the light-conducting plate 4.

[0030] As in Fig. 1 As can be seen, the display 2 has a comparatively large surface area. This is due, among other things, to the fact that, in contrast to the prior art, the outer frame 5 is designed to be particularly slim.

[0031] This is made possible by the use of the light-guiding plate 4 as a support for the safety or escape sign luminaire 1. For this purpose, the outer frame 5 and the light-guiding plate 4 are connected to one another and thus directly via at least one snap connection 6, for which the outer frame 5 forms an elastic spring element 6.1 and the light-guiding plate 4 forms a rigid undercut 6.2 on the narrow side 4.2, 4.3, 4.4 for which the spring element 6.1 can be accommodated. The elastic spring element 6.1 and the rigid undercut 6.2 cooperate to form this snap connection 6. For example, the spring element 6.1 can be snapped or pushed into the undercut 6.2. This creates a stable, direct connection between the outer frame 5 and the light-guiding plate 4, which simplifies the design requirements for the outer frame 5, which can therefore be made narrower and use less material.In addition, this special outer frame 5 results in a compact safety or escape sign luminaire 1.

[0032] As also in the Figuren 1 and 3 As can be seen, the undercut 6.2 is formed by a recess 7 in the light-conducting plate 4. This recess 7 runs from one broad side 4.5 of the light-conducting plate 4 to the opposite second broad side 4.6 of the light-conducting plate 4 - thus passing through the light-conducting plate 4, as shown in Fig. 2 can be recognized. The latter also simplifies the manufacture of the otherwise comparatively rigid light-conducting plate 4, since the undercut 6.2 can be created, for example, in a separation step, possibly with laser cutting, from a broad side 4.6 of the light-conducting plate 4.

[0033] Dimensional tolerances between the snap elements (spring element 6.1 and undercut 6.2) are compensated by the spring element 6.1 having a mushroom shape in cross section, as shown in Fig. 3 can be recognized. A dovetail shape is also conceivable, although this has not been shown in detail.

[0034] The light-conducting plate 4 is centered or positioned in the outer frame 5 by centering projections 8.1, 8.2 formed by the outer frame 5, as shown, for example, in Fig. 4 can be recognized. The light-conducting plate 4 is arranged between these centering projections 8.1, 8.2, which secures its position relative to the outer frame 5.

[0035] The centering projections 8.1, 8.2 also secure the snap connection 6 laterally, thereby limiting the mobility of the light-conducting plate 4 and thus of the spring element 6.1 in the undercut 6.2—that is, the mobility of the spring element 6.1 in the direction of the broad side 4.5, 4.6 stop. This secures the spring element 6.1, particularly in the case of a recess penetrating the light-conducting plate 4, against lateral displacement and thus opening of the snap connection 6.

[0036] As in Fig. 1 As can also be seen, the outer frame 5 comprises the light-conducting plate 4, wherein snap connections 6 and centering projections 8.1, 8.2 are provided on three narrow sides 4.2, 4.3, 4.4, namely on the second, third and fourth narrow sides 4.2, 4.3, 4.4 of the light-conducting plate 4.

[0037] Reproducible external dimensions can thus be set on the safety or escape sign luminaire 1.

[0038] The first narrow side 4.1 of the light-conducting plate 4 is, in contrast to the other narrow sides 4.2, 4.3, 4.4, connected to the

[0039] Outer frame 5 connected, such as Fig.5 This ensures high mechanical stability and also guarantees a predetermined optical connection between the illuminant 3 and the light-conducting plate 4.

[0040] Preferably, the outer frame 5 is T-shaped in cross section in the area of ​​the cross pin connection 9, as in Fig. 2 Essentially, the outer frame 5 is rectangular in cross-section.

[0041] The pin 10 is L-shaped and presses into a projection 10.1 in the receptacle 11, namely a bore formed by the outer frame 5. This creates a press fit 12 that secures the cross-pin connection 9, which is locked by the shape of the pin 10.

[0042] This mechanically resilient connection of the outer frame 5 with the light-conducting plate 4 also makes it possible to attach other components of the safety or escape sign luminaire 1 to this outer frame 5.

[0043] Among other things, a lens body 13, which forms several first optical lenses 13.1, 13.2, 13.3, 13.4 arranged next to one another, as shown for example in the Figuren 6a und 6b can be seen in detail. These first lenses 13.1, 13.2, 13.3, and 13.4 have different optical properties, allowing a wide variety of illumination scenarios to be depicted.

[0044] The outer frame 5 can also support a linear guide 14, which supports two second illuminants 15, namely two LEDs, movably relative to the lens body 13 in both directions R. Depending on the position of the second illuminants 15 relative to the lens body 13, two of the lenses 13.1, 13.2, 13.3 can be selected for an optical connection. Due to the different optical properties of the lenses 13.1, 13.2, 13.3, 13.4, the area surrounding the safety or escape sign luminaire 1 can be illuminated in different ways.

[0045] In addition, the outer frame 5 also carries a second w-shaped lens 16, as shown in Fig. 7 can be seen in detail. This second lens 16 is optically connected to the third end face 4.3 of the light-conducting plate 4, thereby coupling out light, which contributes to the illumination of the surroundings of the safety or escape sign luminaire 1. This second optical lens 16 has a W-shaped contour 17 in cross-section.

[0046] Overall, the snap-in connection according to the invention between the outer frame 5 and the light-conducting plate 4 results in a significantly simplified construction, which leads to a robust and stable safety or escape sign luminaire 1.

[0047] After Fig. 1 The safety or escape sign luminaire 1 is mounted via two mounting brackets 18.1 and 18.2, for example, on a building part not shown in detail. The mounting brackets 18.1, 18.2 are each provided in a corner area 5.1, 5.2 of the outer frame 5, specifically in the area of ​​the first narrow side 4.1 of the light-conducting plate 4, which enables stable and stable installation. The preferably cylindrical mounting brackets 18.1 and 18.2 are attached to the outer frame 5 via screw connections, of which screw connections the nuts serve as fastening elements 19.1, 19.2 in Fig. 1 can be recognized.

[0048] To accommodate these fastening elements 19.1, 19.2 of the safety or escape sign luminaire 1, the light-conducting plate 4 is recessed in the two corner areas 5.1, 5.2. This creates two receptacles 20.1, 20.2 between the outer frame 5 and the light-conducting plate 4. These receptacles 20.1, 20.2 can also be used to accommodate cable ends for mounting the safety or escape sign luminaire 1, which is not shown in detail.

Claims

1. Safety or emergency exit sign lamp (1), more particularly for an emergency lighting system, having an indicator (2), having at least one first illuminant (3), more particularly having at least one LED, having a light-conducting plate (4) optically connected to the first illuminant (3) for backlighting the indicator (2), and having an outer frame (5) that externally encompasses the safety or emergency exit sign lamp (1) on the outside, which is connected to at least one narrow side (4.1, 4.2, 4.3, 4.4) of the light-conducting plate (4), wherein the outer frame (5) and the light-conducting plate (4) are connected to one another via at least one snap connection (6), for which the outer frame (5) forms an elastic spring element (6.1) and the light-conducting plate (4) forms, on the at least one narrow side (4.2, 4.3, 4.4), a rigid undercut (6.2) which can receive the spring element (6.1).

2. Safety or emergency exit sign lamp according to claim 1, characterized in that the undercut (6.2) is formed by a recess (7) in the light-conducting plate (4), which recess (7) extends from a first broad side (4.5) of the light-conducting plate (4) to the opposite, second broad side (4.6) of the light-conducting plate (4).

3. Safety or emergency exit sign lamp according to claim 1 or 2, characterized in that the spring element (6.1) has a dovetailed cross-section or mushroom-shaped cross-section.

4. Safety or emergency exit sign lamp according to one of claims 1 to 3, characterized in that the outer frame (5) has a plurality of centering projections (8.1, 8.2), between which the light-conducting plate (4) projects.

5. Safety or emergency exit sign lamp according to claim 4, characterized in that the centering projections (8.1, 8.2) are designed to limit, more particularly to block, the lateral mobility of the light-conducting plate (4).

6. Safety or emergency exit sign lamp according to one of claims 1 to 5, characterized in that the first illuminant (3) is optically connected to a first narrow side (4.1) of the light-conducting plate (4).

7. Safety or emergency exit sign lamp according to one of claims 1 to 6, characterized in that the first narrow side (4.1) of the light-conducting plate (4) is connected to the outer frame (5) via a transverse pin connection (9).

8. Safety or emergency exit sign lamp according to claim 7, characterized in that a pin (10), more particularly an L-shaped pin, is locked in the transverse pin connection (9) by a press fit (12).

9. Safety or emergency exit sign lamp according to one of the claims 1 to 8, characterized in that the outer frame (5) encloses the light-conducting plate (4) on the narrow sides (4.1, 4.2, 4.3, 4.4).

10. Safety or emergency exit sign lamp according to one of claims 1 to 9, characterized in that snap connections (6) connect the second, third and fourth narrow sides (4.2, 4.3, 4.4) of the light-conducting plate (4) to the outer frame (5).

11. Safety or emergency exit sign lamp according to one of claims 1 to 10, characterized in that the safety or emergency exit sign lamp has, for the purpose of illuminating the surrounding area, a lens body (13) with a plurality of first optical lenses (13.1, 13.2, 13.3, 13.4), at least one second illuminant (15), more particularly at least one LED, which is optically connected to the lens body (13), and a linear guide (14), wherein the outer frame (5) carries the lens body (13) and the linear guide (14) supports the second illuminant (15) such that it can move with respect to the lens body (13).

12. Safety or emergency exit lamp according to claim 11, characterized in that the linear guide (14) is fastened to the outer frame (5).

13. Safety or emergency exit sign lamp according to one of claims 1 to 12, characterized in that the light-conducting plate (4) has a second optical lens (16), which second optical lens (16) is optically connected to the third narrow side (4.3) of the light-conducting plate (4) for the purpose of coupling out light.

14. Safety or emergency exit sign lamp according to claim 13, characterized in that the second optical lens (16) has a w-shaped contour (17) in cross-section.

15. Safety or emergency exit sign lamp according to one of claims 1 to 14, characterized in that the safety or emergency exit sign lamp (1) has at least one mounting holder (18.1, 18.2) which is fastened on the outer frame (5).

16. Safety or emergency exit sign lamp according to claim 15, characterized in that the mounting holder (18.1, 18.2) is arranged on the outer frame (5) in the region of the first narrow side (4.1) of the light-conducting plate (4).

17. Safety or emergency exit lamp according to claim 15 or 16, characterized in that two mounting holders (18.1, 18.2) are provided in each corner region (5.1, 5.2) of the outer frame (5).

18. Safety or emergency exit lamp according to claim 17, characterized in that the light-conducting plate (4) is recessed in the two corner regions (5.1, 5.2), wherein receptacles (20.1, 20.2) for fastening elements (19.1, 19.2) of the mounting holders (18.1, 18.2) are formed between the outer frame (5) and light-conducting plate (4).

19. Emergency lighting system having a safety or emergency exit sign lamp according to one of claims 1 to 18.