EP3527888B1 - Luminaire, particularly moisture-proof luminaire - Google Patents

Description

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

Such lights are known in the field, the housing, for example, in the case of a ceiling light being able to be attached to the ceiling or in a suspended ceiling, it being possible to provide a generally releasable connection between the cover and the housing.

A lamp is, for example, in the utility model DE 20 2016 000 122 U1 disclosed. In these conventional lights, actuatable connecting means such as clamp hooks, rocker arm locks or the like are provided for fastening the cover to the housing, via which the cover can be detached from the housing, for example for maintenance purposes. A generic lamp is in the laid-open specification EP 2 868 964 A1 disclosed. The disclosure document US 2016/0327237 A1 discloses a luminaire comprising an elongated housing, a device carrier which carries a plurality of semiconductor light sources and a trough-shaped optical cover with an opening of the cover fixed longitudinal legs, wherein the device carrier is inserted into the cover and carried by this. The housing and cover are connected by means of turnbuckles.

The present invention is based on the object of improving a conventional lamp with regard to its functionality.

This object is achieved by the present invention with a luminaire comprising the features of claim 1. The luminaire according to the invention is characterized in that the tongue and groove connection of the cover and the housing have corresponding locking elements for locking the cover to the housing, the lockable Tongue / groove connection can be released without tools and that latching elements of the cover each have walls attached to their two longitudinal ends and extending onto a transverse web of the respective longitudinal leg, for the design of a receptacle for a respectively assigned latching element of the housing.

According to the invention, the functional components for providing the tongue and groove connection simultaneously have functional elements or designs for providing a snap, ie latching connection, which come or lead to latching when the tongue and groove connection is positively joined. During the production of the latching, a joining part is elastically deformed and then hooks releasably or non-releasably with a corresponding latching element. According to the invention, one of the components, cover or housing, has a groove and the other component has a tongue corresponding to the groove, with at least one latching element being arranged both on the inner surfaces defining the groove and on the surfaces defining the tongue can be, wherein these locking elements correspond and can automatically provide the described locking between tongue and groove and thus between cover and housing during the joining process for producing the tongue and groove connection. In the luminaire designed according to the invention it is provided that latching elements of the cover are attached to their two longitudinal ends and include walls extending on a transverse web of the respective longitudinal leg to form a receptacle for a respectively assigned latching element of the housing. This measure provides, on the one hand, a reinforcement of the cover in the area of the latching through the walls extending from the latching element and thus a more symmetrical dissipation of the forces occurring when the components are joined / separated. In addition, they provide a secure locking of the associated latching elements, since a latching element of the housing associated with the latching receptacle of the cover rests in the latched state not only with regard to its latching surface on the latching surface of the associated latching element of the cover, but also the respective latching element, which for example can be designed as a latching hook, is received within the receptacle on the cover, so that there is also a form fit between the two corresponding latching elements in the longitudinal direction.

The lamp according to the invention is particularly easy to use when attaching the cover to the housing, since the joining process automatically locks the components to one another, so that sequential actuation of a plurality of clamp hooks or rocker arm locks or the like can be omitted during the joining process. In addition, the appearance of the lamp is improved, since the elimination of these additional locking means in the area of the locking sections between the housing and the cover a closed and homogeneous appearance of the luminaire can be provided.

Further advantageous embodiments and features according to the invention are specified in the general description, the figures, the description of the figures and the subclaims.

Appropriately, it can be provided that in the lamp according to the invention, corresponding latching elements of the tongue and groove connection are covered by the external groove wall in order to maintain a closed and homogeneous appearance of the luminaire so that the latching elements are not visible to a viewer of the luminaire.

Provision can be made for a respective receiving groove to be provided on the cover in order to provide the described tongue and groove connection between the cover and the housing, into which an associated tongue for connecting the two parts can be immersed.

In a particularly advantageous embodiment, the receiving groove can be provided on the housing and the spring can be provided correspondingly on the cover, in particular to provide an attractive appearance of the lamp. For this purpose, the housing can expediently be designed approximately U-shaped in cross-section with legs (side legs) that are spaced apart in the transverse direction and define an opening of the housing at their respective free end section, a receiving groove open in the direction of the cover can be formed with groove walls spaced in the transverse direction of the lamp . The outer groove wall of the receiving groove can have latching elements spaced apart in the longitudinal direction on its inner side for latching with associated latching elements of the cover. This embodiment also has the advantage that the connecting or receiving groove points downwards in the installed position and in this respect the tongue and groove connection between the cover and the housing is protected or covered.

The outer groove wall can preferably extend with a uniform height over the length of the housing, which further enhances the harmonious appearance of the lamp. In an advantageous embodiment, it can be provided that the inner groove wall of the receiving groove has a lower height than the outer groove wall, for example in order to accommodate sections of the device carrier in the free space formed in this way, which under certain circumstances can be aligned with the inner groove wall.

A design in such a way that the free edge of the outer groove wall extends beyond the corresponding inner locking elements of the leg of the housing also has the advantage that a gripping edge is provided, for example to sequentially engage the locking for the purpose of servicing the lamp to loosen the longitudinally spaced (latching) points, then to loosen the tongue and groove connection by moving away from each other between the housing and the cover and thus to cancel the connection between the cover and the housing.

Preferably, after the joining movement between the cover and the housing has ended, a foamable seal is designed within the receiving groove for setting the described tongue and groove connection and for locking it into place. For this purpose, for example, a hollow insertion element such as a thin needle can be inserted into the groove, preferably close to the groove base, and then the seal can be foamed into the groove by inserting the material. In Another embodiment, however, can also be provided to place a seal on the groove bottom before the setting of the tongue and groove connection and subsequent locking, which after the setting of the tongue and groove connection and locking as in the first-mentioned embodiment, a hermetic seal of the interior of the Provides luminaire to the outside.

In order to ensure when the cover and housing are joined that when the guide surfaces of mutually assigned locking elements of the cover or the housing slide onto one another, not the longitudinal legs of the housing are widened, but rather the respective receiving groove, it can expediently be provided that the springs of the optical cover are on the inside have a plurality of longitudinally spaced apart and inwardly and in the direction of the base of the cover extending joining or guide ribs for support on the inside groove wall of the housing. The design can be such that during the joining movement between the cover and the housing, the said joining ribs first come to rest on the inner surface of the inner groove wall of the housing and only then or at the same time do the inclined or guide surfaces of the associated latching elements of the cover and the sliding on each other Housing for expanding the receiving groove during the joining process.

In order to provide an improved sealing function when using a seal within the receiving groove of the tongue and groove connection, it can be provided that the tongue of the cover has a web at its free end, which is on the outside at longitudinal locations at which a latching element is arranged on the tongue , merges into an inclined surface of the latching element and to which the joining rib design adjoins on the inside, so that the said web is designed as a sealing web which presses the seal against the groove base of the receiving groove.

In order to facilitate the disengagement of the cover and the housing, it can expediently be provided that a respective optical and / or haptic marking is designed on the outside of the outer groove wall in the longitudinal region of a locking element arranged on the inside of the outer groove wall, for example in the form of two markings such as Ribs which indicate the longitudinal extension of the respective locking element. These markings can indicate to the respective user at which points the respective outer groove wall is to be elastically deflected in order to release the respective latching between cover and housing at this point. A haptic marking here means any surface design on the outside of the outer groove wall at the designated points that can be detected by touching.

Figur 1

in einer Explosionsdarstellung in einer Seitenansicht einer Ausführungsform einer erfindungsgemäß gestalteten Leuchte,

Figur 2a

den Geräteträger der Leuchte gemäß Figur 1 in einer Schrägansicht,

Figur 2b

die optische Abdeckung der erfindungsgemäßen Leuchte gemäß Figur 1 in einer Schrägansicht,

Figur 2c

die beiden in den Figuren 2a, b angegebenen Bauteile im verrasteten Zustand in einer Schrägansicht,

Figur 3

das Gehäuse der erfindungsgemäßen Leuchte der Figur 1 in einer Schrägansicht,

Figur 4

die erfindungsgemäße Leuchte in einer offenen Stirnseitenansicht und

Figur 5

die Verrastung des Gehäuses mit der optischen Abdeckung

zeigt.The invention is explained below by describing an embodiment together with modifications with reference to the accompanying drawings, wherein

Figure 1

in an exploded view in a side view of an embodiment of a lamp designed according to the invention,

Figure 2a

the device carrier of the luminaire according to Figure 1 in an oblique view,

Figure 2b

the optical cover of the lamp according to the invention according to Figure 1 in an oblique view,

Figure 2c

the two in the Figures 2a, b specified components in the locked state in an oblique view,

Figure 3

the housing of the lamp according to the invention of Figure 1 in an oblique view,

Figure 4

the lamp according to the invention in an open end view and

Figure 5

the latching of the housing with the optical cover

shows.

Figure 1 represents an exploded view of the lamp according to the invention, which is designed in the described embodiment as a damp-proof ceiling lamp. In the embodiment described, it comprises an elongated, trough-shaped housing 10 with an approximately U-shaped cross-section perpendicular to the longitudinal extent, which extends through a base section 11 and two side legs extending approximately perpendicularly therefrom 12a, b is formed. At the free end of the two side legs 12a, b, the housing 10 each has a longitudinally extending receiving groove 13a, b for interacting with longitudinally extending springs 55a, b at the free ends of the legs 51a, 51b of the trough-shaped cover 50 Housing 10 can be made in one or more pieces, for example three-piece with an elongated part and one end face each at the longitudinal end of the housing 10. In all of these described embodiments, the receiving groove on the housing and the tongue on the cover also run in these end face sections, so that the lamp is closed is. Depending on the embodiment, the housing can be formed from a plastic, in another embodiment from a metal material.

The luminaire designed according to the invention also has a so-called equipment carrier 30, which here is plate-shaped with a top 31 and a bottom 32. While the top 31 in the installed position is directed towards the bottom 11 of the housing, the underside 32 of the device carrier 30 in the installed position points to the trough bottom of the optical cover 50. In the embodiment described, the device carrier 30 carries the illuminant in the form of a plurality of on its underside 32 Semiconductor light sources, in particular LEDs, which can be arranged, for example, in a series arrangement on a printed circuit board, the circuit board being attached to the underside of the device carrier 30. In another embodiment, the LEDs can also be applied directly to the device carrier 30. In addition, interconnections, cabling, connection terminals and in particular one or more operating devices for the lighting means can be made on the device carrier, the interconnection then taking place via corresponding openings or feedthroughs from the top 31 to the bottom 32. For the sake of clarity of illustration, the equipment carrier is equipped with the equipment described not shown in the figures. Depending on the embodiment, the equipment rack can be made from a metal or a plastic, in particular in one piece.

As a further component of the luminaire 1 according to the invention, it includes an optical cover 50 which is also trough-shaped here, which is made of a translucent material in the embodiment described and can also be transparent in another embodiment. For the purpose of guiding the light or creating a predetermined light distribution curve below the lamp, the cover can be provided on its inner surface with light-guiding structures 52, for example in the form of prism-shaped ribs extending in the longitudinal direction. Such light-guiding structures can, however, also be provided on the optically effective outer surface 53, with the cover in the described embodiment having a smooth, unstructured surface in order to avoid the accumulation of dirt. It should be noted that the in Figure 1 The cover shown and the housing are shown open on their right-hand side for clarity of illustration. In one embodiment, both the housing 10 and the cover 50 can be formed in one piece. However, it is also possible to use several of the in Figure 1 Assemble specified elements to design a lamp with in principle any length.

With reference to the Figures 2a to 2c the structure of the device carrier 30 and the cover 50 with regard to their connection to one another is explained below. It should be noted that the components 30 and 50 of the luminaire 1 according to the invention in the representations of FIG Figures 2a - c more compact than in Fig. 1 appear.

In the too Figure 1 detailed representation of the Figure 2a of the device carrier 30 are on the two side flanges 33a, b provided locking recesses 35 spaced apart in the longitudinal direction, in which corresponding locking hooks 57 of the optical cover 50 cooperate in a manner to be described below when the two parts are connected to one another, see FIG Figure 2b . In addition, between two locking recesses 35 spaced apart in the longitudinal direction, a respective guide recess 36 is provided in the device carrier 30, which is incorporated in a channel-shaped shoulder 37 in a transverse end section of the device carrier, to which a respective side flange 33a, b adjoins, which is essentially perpendicular to the top - or underside of the device carrier runs. These guide recesses 36 act in a manner still to be described with tabs 56 arranged on the optical cover 50 for the relative guidance of the device carrier to the cover 50 during the process of locking the two parts to one another.

In the illustration of the optical cover 50 of FIG Figure 2b the locking hooks 57 just mentioned and the guide tabs 56 are shown. The locking hooks 57 extend on the inside in the transverse direction on the inside of the respective side legs 51a, b and provide a locking surface 58 which extends here perpendicular to the respective side legs 51a, b and which, after locking with the device carrier 30, presses on the top of the channel 37. In the locked state to be described below, the guide tabs 56 extend in the guide recesses 36 of the device carrier 30. In the area of the springs 55a, 55b, a plurality of guide ribs 60 are again provided, spaced apart in the longitudinal direction of the cover, which extend over almost the entire height of the spring and afterwards extend inside. It should be noted that the described latching recesses, guide recesses, guide tabs, and latching hooks are constructed identically on both longitudinal sides of the components 30, 50.

When assembling the device carrier 30 with the optical cover 50, both are initially oriented to one another in such a way that that the guide tabs 56 are aligned with the assigned guide recesses 36 and both parts 30, 50 are moved towards one another in a direction perpendicular to the longitudinal extension of the parts until the guide tabs 56 engage in the respectively assigned guide recesses 36. When moving further towards one another, the underside sections of the channel 37 slide along the incline or guide surface of the latching hooks 57 until the latching hook 57 with its latching surface 58, see FIG Figure 2b , comes to rest or snaps into place on the surface of the channel 37 of the device carrier 30. With the described latching of the latching hooks 57 of the cover 50 in the associated latching recesses 35 of the device carrier 30, the two components 30, 50 are releasably connected to one another, see FIG Figure 2c . The outer surfaces of the side flanges 33a, b of the device carrier 30 bear against the guide ribs 60 extending inward from the spring 55a, b.

For example, from the representation of the Figure 2c As can be seen, the two side legs 51a, b have on their end sections and the springs 55a, b on their outer sides longitudinally spaced latching hooks 64 which interact with associated latching elements arranged on the housing 10 to latch the cover 50 when the device carrier is latched onto the housing 10 work together. As evidenced by the representation of the Figure 2c In the embodiment described, the latching hooks 64 each have an inclined surface or guide surface 65 and a latching surface 70 running approximately perpendicular to the respective spring. In the described embodiment, walls 66a, b are attached to the two longitudinal ends of the respective latching element 64, which extend outwards and in the illustration of the Figure 2c downwardly except for a transverse web 68 extending from the respective spring 5a, b. The locking surface 70, the inner sides of the walls 66a, b and the surface of the transverse web 68 visible in the figure form a respective locking receptacle for receiving a respectively assigned locking hook 20 on the housing 10, which is discussed in more detail below.

In the representation of the Figure 3 of the housing 10, design features of the housing for locking the cover 50 to the housing 10 emerge in detail. In the embodiment described, the elongated, trough-like housing 10 has two side legs 12a, b, at the free ends of which each have a receiving groove 13a, b for receiving a respective spring 55a, b of the cover, see for example Figure 2b , on. This receiving groove is each formed by a groove base wall 18, 19 running approximately perpendicular to the respective side limbs 12a, b, as well as two adjoining and spaced apart groove walls, ie in the case of the receiving groove 13a the inner groove wall 16 and the outer groove wall 17 and in the case of the Receiving groove 13b, the inner groove wall 14 and the outer groove wall 15.

In this case, at a distance from the free end of the respective outer groove wall 15, 17, locking hooks 20 spaced apart in the longitudinal direction are provided on the inside thereof directed towards the groove. The latching hooks 20 extend transversely to the longitudinal direction inward with an inclined or guide surface 21 directed towards the free end of the outer groove wall and a latching surface 22 directed into the respective groove interior, which here runs approximately perpendicular to the outer groove wall. The latching hooks 20 arranged on the inside of the outer groove wall 17 are covered except for the latching hooks 20 visible on the right-hand end of the housing in the figure. Marking ribs 23a, b which act as guide aids are provided on the outside of the outer groove walls 15, 17 and each mark a latching hook 20 arranged on the rear side of the outer groove wall 15, 17. When the latching between the housing and cover is released, they serve as grip markings in order to identify the points at which the respective outer groove wall 15, 17 is to be gripped and pivoted outwards in order to sequentially latch on to the latching hooks 20 in the kind of zipper process to solve.

The cover 50 with the device carrier 30 attached to it is latched to the housing 10 in that the springs 55a, b of the cover 50 are aligned with the receiving grooves 13a, b of the housing and the housing and cover are then moved towards one another. First, the guide surfaces 65, 21 of the associated latching elements 64, 20 slide on each other and at the same time the guide ribs 60 of the cover 50 along the inside of the inner groove wall 14, which ensures that the receiving groove is widened to accommodate the tongue 55a, b in the Receiving groove 13a, b and not instead the housing is bent open at its side legs 12a, b. When the cover is moved further towards the housing, the surfaces 21, 65 slide on one another and pivot the outer groove walls 15, 17 elastically outward until the latching surface 22 of the latching hook 20 reaches the latching surface 70 of the associated latching hook 64 and the outer groove walls 15 , 17 pivot inward, whereby associated locking surfaces 22, 70 come to rest and thus the cover is locked to the housing, see Fig. 4 . In the embodiment described, this position is characterized in that the latching hooks 20 are received in the respective latching receptacles 69 of the cover.

Figure 5 shows the in Figure 4 Latching situation shown on the right-hand side in detail from a slightly different perspective. It can be seen that the guide ribs 60 rest on the inside of the inner groove wall 16, while the latching hooks 20 of the housing are received in the latching receptacles 69. The in Figure 5 The cavity marked with the reference numeral 80 forms a sealing space in which a seal is filled with foam after the cover has been locked to the housing. The spring 55a, b protrudes with the sealing web 67 into the sealing material. As evidenced by the Figure 5 are the side flanges 33a, b in the locked state of Cover 50 with housing 10 aligned with inner groove wall 14, 16.

List of reference symbols

1

lamp

10

casing

11

Floor section

12a, b

leg

13a, b

Receiving groove

14th

Inner groove wall

15th

Outer groove wall

16

Inner groove wall

17th

Outer groove wall

18th

Groove base wall

19th

Groove base wall

20th

Locking hook, locking element

21

Guide surface

22nd

Locking surface

23a, b

Marking, marking ribs

30th

Equipment carrier

31

Top

32

bottom

33a, b

Side flange

35

Locking recess

36

Guide recess

37

Paragraph, gutter

50

Optical cover

51a, b

Side thighs, long thighs

52

Light directing structure

53

Exterior surface

55a, b

feather

56

Guide tab

57

Locking hook, locking element

58

Locking surface

60

Guide rib, joining rib

61

web

64

Locking hook, locking element

65

Guide surface, inclined surface

66a, b

Side wall

67

Sealing bar

68

Crossbar

69

Snap recording

70

Locking surface

80

Sealing space

Claims (8)

1. Luminaire (1), in particular damp-proof luminaire, comprising an oblong housing (10), a gear tray (30) that carries a multitude of semiconductor light sources as well as a trough-shaped optical covering (50) with longitudinal legs (51a, b) that define an opening of the cover, wherein the gear tray is snapped on the cover and the cover (50) and the housing (10) have a tongue and groove joint (13a, 55a; 13b, 55a), characterized in that the tongue and groove joint (13a, 55a; 13b, 55a) is designed with corresponding snap-in elements (20, 64) for snapping the cover (50) with the housing (10), wherein the snap-in tongue and groove joint (13a, 55a; 13b, 55a) can be released without any tool and that snap-in elements (64) of the cover have walls (66b, 66a) that are attached respectively at their both longitudinal ends and that extend on a cross web (68) of the respective longitudinal leg (51a, b) for configuring a recess (69) for a respectively associated snap-in element (20) of the housing (10).
2. Luminaire (1) according to claim 1, characterized in that the housing is designed with an approximately U-shaped cross-section with spaced legs (12a, b) that define an opening of the housing, at the free end section of which a receiving groove (13a, 13b) is respectively configured with groove walls (14, 15; 16, 17) that are spaced in the transverse direction of the luminaire (1), wherein the outer groove wall (15, 17) projects over the height of the inner groove wall (14, 16) and has, on its inner side, snap-in elements (20) that are spaced in longitudinal direction for snapping-in with associated snap-in elements (64) of the cover (50) and wherein the outer groove wall (15, 17) extends with a uniform height over the length of the housing (10).
3. Luminaire (1) according to claim 2, characterized in that corresponding snap-in elements (20, 64) of the groove and tongue joint (13a, 55a; 13b, 55a) are covered by the outer groove wall (15, 17) of the housing.
4. Luminaire (1) according to claim 1, 2 or 3, characterized in that respective snap-in surfaces (21) of the snap-in elements (20) of the housing are placed in direction of the cover (50) below the free end of the inner groove wall (14, 16) of the housing (10).
5. Luminaire (1) according to one of the claims 1 to 4, characterized in that longitudinal legs (51a, b) of the optical cover (50) are configured in their respective end area as tongues (55a, b) that have on the outer side a multitude of spaced snap-in elements (64) that cooperate with the snap-in elements (20) of the housing (10), wherein the snap-in elements (64) of the cover comprise a guide surface (65) that extends obliquely to the tongue (55a, b) and a snap-in surface (70) that extends approximately perpendicularly to the tongue (55a, b).
6. Luminaire (1) according to claim 5, characterized in that the tongues (55a, b) of the optical cover (50) have on the inner side a multitude of assembly ribs (60) spaced in longitudinal direction and that extend inwards and in direction of the foot of the cover for supporting on the inner groove wall (14, 16) of the housing (10).
7. Luminaire (1) according to one of the claims 5 or 6, characterized in that the tongues (55a, b) of the cover (50) have at their free end a sealing web (67) that merges on its outer side into an oblique surface (65) of a snap-in element (64) and to which the assembly rib (60, ....60) is attached.
8. Luminaire (1) according to one of the claims 1 to 7, characterized in that an associated haptic and/or optical marking (23a, b) is designed on the outer side of the outer groove wall (15, 17) in the longitudinal area of a snap-in element (20) placed on the inner side of the outer groove wall.

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