EP2299169A1 - Lamp comprising locking means for detachably fastening cover on housing - Google Patents

Abstract

The lamp has a holder (4) for a light source (5) found in a housing tray (2), and a cover (6) for the housing tray. The cover is designed as a disk and is made from a transparent or translucent material. A fastener (8) is provided for detachably fastening the cover on the housing tray. The fastener is connected only to an inner side of the cover. The fastener includes a magnet holding device for holding magnets.

Description

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

In a lamp of this type is a common construction with a housing pan, a housing located in the lamp socket, electrical connection and equipment for the lamp, a cover for the housing tray of translucent material and closure means for releasably securing the cover to the housing tray ,

A luminaire of this type has fastening means for direct or indirect attachment to a wall or a ceiling. In the latter case, the lamp can be attached directly or in a suspended by means of ribbons, chains or cords arrangement on the ceiling.

In a present luminaire, for various reasons, at certain or indefinite intervals, access to the interior of the casing tub is required, e.g. replace the light source or electrical equipment or perform maintenance. For access, the closure means and the cover must be opened and closed again after access. These measures require a considerable amount of handling and time in known lights, whereby considerable operating costs for the lamp are given. There is thus the demand for a simple and quick access to the housing interior.

It should also be considered that desirable for a lamp as unobstructed light emission and also the emission side of the lamp is a visible side that takes formative influence on the room to be illuminated. Therefore, especially for a living or office space, a construction is required for the luminaire, which has a good appearance.

Known closure means for releasably securing the cover to the housing pan pass through the cover in feedthrough holes. hereby Not only are the appearance of the luminaire and its suitability for living or office space affected, but it can also impurities such as dust, moisture, z. As water or spray in particular, get into the housing interior or at least accumulate at the feed-through joints, which is undesirable.

The invention has for its object to improve a lamp of the type specified in that to the outside of the disc no fasteners are available.

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

In the lamp according to the invention, the closure means engage only on the inside of the cover on this or they are connected only on the inside of the cover with this. As a result, the functional area of the closure means which is in contact with the cover is displaced or restricted to the inside of the cover, the closure means being arranged completely in the housing interior. Therefore, the parts of the closure means with the cover in the closure function are arranged in the housing interior and thus hidden from the outside and removed from view from the outside. Therefore, the visual appearance of the luminaire which is visible when looking at the outside of the cover is also improved.

In particular, such closure means are suitable, the housing side-side closure means parts and cover-side closure means parts cooperate by magnetic force and hold each other. Such closure means may form at least one magnetic holding device. A magnetic holding force is therefore particularly well suited for the closure means, because they are detachable from each other by peeling off the cover, for. B. by manual attack on the cover by means of a suction head. Ie. special, externally accessible components on the cover for releasing the closure means are not required.

A magnetic holding device is also advantageous because it can be realized with a low height, which also a low height for the lamp can be achieved. Both a magnet of the holding device and a counter-element made of ferromagnetic material may be formed in a flat design.

To this advantage also contributes to a training of the cover as a disc. In addition, this achieves a good light emission.

The attachment of the cover or the disc associated closure means parts is preferably carried out by gluing. For this purpose, it is advantageous to apply in the region of the splices a preferably annular circumferential solid layer, in particular a ceramic layer, on the cover or the disc, preferably prefabricate during their production. As a result, a stable adhesive attachment can be achieved.

At least two oppositely arranged magnetic holding devices can be realized preferably at two in the housing interior opposite each other arranged device carriers that stabilize the housing pan.

It is advantageous for safety reasons, to provide a backup between the housing and the cover or disc, which prevents the cover, z. B. after its release, could fall down. Such a suspension can be trained in a simple and safe way as cable pull.

It is further advantageous to provide a centering device between the housing pan and the cover, the z. Example, by a plug-in recess on one part and a plug-in pin on the other part, in particular on the inside of the cover, may be formed and allows accurate positioning of the cover with respect to the housing pan.

According to one embodiment of the invention, an annular seal is disposed between the housing pan and the cover or disc, which is preferably formed by a sealing strand of elastically deformable material. The sealing strip may be permanently attached to the cover or on the housing pan, z. B. by gluing or foaming. The embodiment of the invention is therefore very advantageous for a clean room lamp in which the interior of the housing should be sealed to protect it from contamination and to ensure easy and easy cleaning of the lamp.

The ring seal is preferably arranged on the peripheral edge of the housing pan and the cover, wherein the closure means and also preferably existing centering surrounds and thus seals and protects against contamination. The ring seal also allows - seen from the inside - dust and splash water proof design of the lamp. A luminaire with this development is therefore also suitable for rooms of medical areas, in particular examination and operating rooms, in which for the purpose of cleaning or disinfecting a splashing of the lamp takes place with disinfectants.

Further development features of the invention allow a simple, inexpensive to produce and simple and easy to install or dismantle construction of the lamp.

Fig. 1:

eine erfindungsgemäße Leuchte in der Blickrichtung auf ihre Abstrahlseite und mit einer Abdeckung in geöffneter Stellung in perspektivischer Darstellung,

Fig. 2:

die Leuchte in einer z. B. an einer Decke aufgehängten oder befestigten Stellung im vertikalen Querschnitt,

Fig. 3:

die in Fig. 2 mit X gekennzeichnete Einzelheit in vergrößerter Darstellung,

Fig. 4:

einen Teil-Schnitt IV-IV in Fig. 2.

Below, advantageous embodiments of the invention will be explained in more detail with reference to embodiments and drawings. It shows:

Fig. 1:

a luminaire according to the invention in the viewing direction on its emission side and with a cover in the open position in a perspective view,

Fig. 2:

the lamp in a z. B. suspended or fixed to a ceiling position in vertical cross-section,

3:

in the Fig. 2 with X marked detail in an enlarged view,

4:

a part-section IV-IV in Fig. 2 ,

The main parts of in Fig. 1 1 in its entirety are a housing pan 2, at least one housing interior 3 arranged in the socket 4 for a light source 5, a cover 6 for covering the trough opening 7, and closure means 8 for releasably securing the cover 6 on the housing trough second

In the present embodiment, the housing pan 2 has the shape of a preferably cuboid box with a bottom wall 2a and four projecting from the edges side walls 2b, 2c, 2d, 2e, wherein in a preferably elongated shape of the lamp 1, two broad side walls 2b, 2c and two narrow side walls 2d, 2e, which are opposite to each other and form a quadrangular peripheral wall 2f here. From the free edge 2g of the peripheral wall 2f an edge strip 2h extends inwards. The width of the edge strip extending parallel to the bottom wall 2a is designated by b. The edge strip 2h is preferably recessed from the free edge 2g starting at the dimension a with an oblique or rounded edge strip portion, the z. B. can extend from the free edge 2g. The z. B. on all sides z. B. formed with a same width b edge strip 2h limited with its inner edge, the trough opening 7, which is covered by the cover 6 and preferably extends to the free edge 2g and thus corresponds to the horizontal shape and size of the housing trough 2.

One or more closure means 8 are present, which are effective or arranged opposite one another in the edge region of the housing interior 3 and each have a closure part 8a associated with the housing trough 2 and a closure part 8b associated with the cover 6. In a lamp 1 with approximately equal length and width dimensions, two closure means 8 can be arranged opposite one another. In a present elongated light 1, which is designed in particular for an elongated light source, for. As for a fluorescent tube, it is advantageous for reasons of weight balance to arrange a plurality of closure means 8 in the edge region on the broad sides of the lamp 1, z. B. on each broadside two closure means 8 in the end regions or in addition a further closure means 8 in the central region of the respective broadside.

In the exemplary embodiment, the closure means 8 are each formed by a holding device with a permanent magnet 8d and a counter element 8c of ferromagnetic material, wherein preferably the counter element on the cover 6 and the magnet 8d of the housing pan 2 is assigned.

A magnetic holder has several advantages. First, it does not require direct manual accessibility. The closing force of the existing holding devices is so great that the cover 6 is held securely when it rests on the housing pan 2, but is also so large that by a manually applied tensile force, for. B. by a suction head to the cover and manual pulling the magnetic closure is releasable, wherein the holding device parts are detached from each other. It does not require a direct manual attack on the closure parts 8a, 8b, but the operator can manually attack the cover 6 to release the magnetic locks. The magnetic fasteners can thus be arranged invisibly in the housing interior 3 so that they are not visible on the visible side of the luminaire 1 facing the room to be illuminated are. It is also not necessary that the cover 6 associated closure part or magnetic part, the cover 6 overlaps at its edge, as is necessary in the prior art.

In Fig. 2 on the right, the magnet 8d is not shown.

Another advantage of a magnetic closure is the fact that it can be designed with low construction height and therefore it protrudes relatively little into the housing interior 3 and the lamp 1 can be formed with relatively low construction height.

The cover 6 associated counter-element 8c may be formed flat and z. Example, be formed by a thin disc or a film of ferromagnetic material, which is glued to the inside 6b of the cover 6, here on the inside 6b of the cover forming a disc 6a of transparent or translucent material, in particular glass or plastic. The housing shell 2 associated closure part 8a has a flat of the cover 6 facing effective surface. In order to ensure a flat contact of the magnetic parts to one another in the closed position, the closure part 8a associated with the housing pan 2 is preferably held on all sides in a pendulum manner.

In the exemplary embodiment, the housing part 3 associated magnetic part 8a is formed by a ring or pot magnet, in the bottom of a cap screw 11 is screwed, the head of a support device 12 in a hole from above durchfasst and is held therein with lateral and vertical movement play.

The housing part 2 associated closure part 8a is located inside of the edge strip 2h at a height in which it holds in connection with the cover 6 associated closure member 8b the disc 6a in the closed position in which its inner side 6b is preferably a small distance c ( Fig. 3 ) of the housing tray 2 has.

The support device 12 has a corresponding closure member 8a supporting support rail 13 and a device carrier 14 which is arranged and held on the associated side wall 2b, 2c and extends over a large part of the length of the side wall 2b, 2c. On the opposite side of the lamp 1, the supporting device 12 arranged there is arranged and formed with respect to the longitudinal center plane 15 of the lamp mirror-symmetrical. It is therefore described the support device 12 only on the left side.

The device carrier 14 is preferably angularly formed in cross section with a parallel to the associated side wall 2b, 2c extending lower and extending to the inner edge 2g support leg 14a and a parallel to the bottom wall 2a extending upper support leg 14b, which is attached to the bottom wall 2a, z. B. by screws, not shown. The upper support leg 14b may have at its inner edge a leg 14c extending up to the bottom wall 2a, so that a leg portion 14d extending between the latter and the lower support leg 14a is at a distance from the bottom wall 2a. An electric ballast 16, which belongs to an electrical connection device 17, may be fastened to the support leg section 14d.

The support rail 13 is preferably a rail, z. As a U-profile rail, which are inserted horizontally in corresponding slots 18 of support webs 19, which protrude from the lower support legs 14a and are preferably integrally connected thereto. The support webs 19 may be cut free by an angular cut 20 in the support leg 14a and bent inwardly about an associated vertical bending edge.

The cover 6 is sealed with respect to the housing trough 2. In the embodiment, an annular sealing element 21 is disposed between the edge strip 2h and the inner side 6b, which is preferably attached to the edge strip 2h, z. B. is glued. In the embodiment, the sealing element 21 is a z. B. in cross-section of a semicircular sealing strip made of elastically compressible material which may be foamed and has a smooth surface. In the closed position of the cover 6, the sealing element 21 is elastically compressed.

The counter element 8c is z. B. formed by holding plate 23 made of steel, which is adhered to the inside 6 b of the cover 6. In the embodiment, the plate 23 is formed by an angle with an upright inside leg 23a, which fulfills a positioning function to be described later.

To ensure that the existing holding plates 23 are not visible from the outside, between the holding plate 23 and the cover 6, a special solid layer 24, in particular made of ceramic, is provided, which is firmly connected to the cover 6 and in the embodiment to the outside white and black inside. In such a case, the holding plates 23 are on the layer 24th glued. The layer 24 preferably extends over the entire circumference of the inner side 6 b and thus forms a ring strip, here quadrangular shape.

The layer 24 is applied during manufacture of the cover 6 or disc 6a and connected intensively and permanently. It is thus prefabricated on the cover 6. Due to the ring shape, other parts of the lamp 1 to be described can be stably glued to the cover.

Between the housing pan 2 and the cover 6, at least one centering device 25 is arranged, which centers the cover 6 with respect to the housing pan 2. For design reasons, two centering devices 25 are preferably provided opposite each other in the edge region of the lamp 1, which are arranged and constructed in mirror image to each other, so that only one centering device 25 needs to be described.

The centering device 25 has a centering recess 25a and a centering pin 25b which can be inserted therein with little play of movement. In the exemplary embodiment, the preferably pointed centering pin 25 b is fixed on the inside of the cover 6, and the centering recess 24 a is arranged in an attachment of the housing pan 2, z. Due to the ring shape of the layer 24 can also be the centering pin 25b on the inside 6b stable and secure on the layer 24 sticking. For this purpose, he may have a head flange 25c to increase the adhesive surface. In the embodiment, two centering devices 25 are preferably arranged opposite one another in the front end regions of the lamp 1, preferably centrally.

In order to hold the at least one and preferably elongated light source 5, in particular formed by a fluorescent tube 5, in each case a socket carrier 27 is arranged in the housing tub 2 in the housing pan 2, which is located on the bottom wall 2a or on the device carriers 14 arranged opposite one another . whose support legs 14b and 14d may be attached. Preferably, not only a socket 28, but several versions 28 are arranged side by side on the holder support 27, wherein a socket 28 is preferably arranged centrally. In the embodiment, two further sockets 28a to 28f are arranged on both sides of this central frame 28.

In order to reflect the light emitted by the at least one light source 5 towards the trough opening 7, at least one reflector 29 is arranged in the housing trough 2, which can be installed through the trough opening 7 and is positioned in the housing trough 2 by a jack 31. The reflector 29 is z. B. dome-shaped with opposing reflector side walls 29 a, the concave curved reflecting surfaces 29 c have and extend straight in a present elongated lamp 1 in the longitudinal direction.

The jack 31 may be formed by positively cooperating with the reflector side walls 29a positioning. In the exemplary embodiment, the reflector side walls 29a in their free edges on an inwardly bent flange 29d. Positioning parts 31a, which are preferably formed by the free ends of positioning webs 19a, which are likewise cut out of support leg 14a by an angular cut 20a and bent inwards as vertical webs, engage in the free space formed on the inside thereof.

In order to obtain different light emissions, preferably two correspondingly different reflectors 29 of the luminaire 1 are assigned, which can be installed optionally. Preferably, it is a symmetrical reflector 29 with symmetrical reflector side walls 29a and an asymmetric reflector 29 with asymmetric reflector side walls 29b, which to clarify the facts in Fig. 2 both are shown. As the drawing clearly shows, the curvatures of the opposite reflector side walls 29b of the asymmetric reflector 29b are different. On the one hand the curvature is flatter and on the other hand stronger. To illustrate the asymmetry on both sides, a reflector 29 are shown with one to the left and a reflector 29 with an asymmetry to the right. In Fig. 1 the reflector 29 is not shown.

In addition, hinted grid 32 may be provided which extend in a conventional manner transverse to the longitudinal direction of the lamp 1. The reflector or reflectors 29 can form a structural unit with the grids 32.

By a different equipping of the sockets 28 to 28f each with a central or one or more light sources 5 arranged on one side, the asymmetrical light emission can be changed or adjusted with respect to the light density and also with respect to the asymmetry.

The luminaire 1 may be a surface mounted luminaire or a suspended luminaire 1 that can be directly attached to a ceiling or wall. For the latter case, four suspension elements 33 are provided in the corner regions of the bottom wall 2a, which can be connected to cables, chains or pendulums for suspension on a ceiling.

In order to ensure that the light emitted by the at least one light source 5 is substantially radiated downwards from the luminaire 1 or at least does not fade outwards, a flat light influencing means 34, e.g. As a scattering film, a micro prismatic disk or a grid, be arranged. For positioning or attachment of the light influencing means 34 on the inner side 6b are positioning means 35, z. B. profile angle 35 a, provided z. B. are arranged and positioned on the inside 6b, z. B. are glued to the layer 24 or attached to the legs 23 a, z. B. by screwing or clipping on.

In order to avoid that the cover 6 or the disc 6a falls down after release, a safety device 36 is provided with at least one suspension element 36a, which prevents falling over a suspension position addition. In the embodiment, two flexible bands 36, z. As ropes, provided, which are arranged at a distance from each other and are connected by connecting elements 37 a, 37 b with the cover 6 and the disc 6 a and the housing pan 2 and are sized so long that the cover 6 at a small distance from the Housing wall 2 gets stuck. The bands and preferably releasable fastening elements are preferably arranged in the edge region of a broad side of the housing trough 2 and the cover 6 or disc 2a. The connecting elements 37b are preferably adhesively bonded to the inner side 6b of the cover 6 or pane 6a, in particular to the layer 24.

Claims (19)

Light (1) with a housing pan (2), at least one socket (4) in the housing pan (2) for a light source (5), a cover (6) for the housing trough (2) made of transparent or translucent material, - And closing means (8) for releasably securing the cover (6) on the
Housing tray (2),
wherein the closure means (8) only on the inside (6b) of the cover (6) engage on this or are connected thereto,
characterized,
in that the closure means (8) have at least one magnetic holding device. Luminaire according to claim 1,
characterized,
comprises that the holding device associated with one of the housing trough (2) magnet (8d) and a cooperating counter element (8c) on the inside (6b) of the cover (6). Luminaire according to claim 2,
characterized,
that the magnetic force of the magnet is greater than the weight of the cover (6) with associated attachments and by a manually applied, on the cover (6) engaging tensile force is solvable. Luminaire according to claim 2 or 3,
characterized,
that the counter element (8c) is glued to the inside (6b). Luminaire according to one of claims 2 to 4,
characterized,
that the counter element (8c) by a plate (23) is formed. Luminaire according to one of claims 2 to 5,
characterized,
in that a fixed layer (24), which is preferably prefabricated during the production of the cover (6), is arranged between the counter-element (8c) and the inner side (6b),
wherein the layer (24) is preferably made of ceramic. Luminaire according to one of claims 2 to 6,
characterized,
that the magnet (8d) is held pendelbar. Luminaire according to one of the preceding claims 2 to 7,
characterized,
that the magnet is a ring or pot magnet. Luminaire according to one of the preceding claims,
characterized,
in that closure means are arranged on two opposite sides of the luminaire (1). Luminaire according to one of the preceding claims,
characterized,
that it has a quadrangular and preferably elongated shape, wherein two or more holding devices are preferably arranged in the region of the broad sides. Luminaire according to one of the preceding claims,
characterized,
that between the housing pan (2) or attachments thereof and the cover (6) is provided a dependent securing device (36). Luminaire according to claim 11,
characterized,
in that the securing device (36) has at least one band-shaped connecting element (36a), wherein at least two band-shaped connecting elements (36a) are preferably arranged at a distance from one another on a broad side of the luminaire (1). Luminaire according to one of the preceding claims,
characterized,
that between the housing pan (2) or attachments thereof and the cover (6) at least one centering device (25) is arranged, wherein preferably two centering devices (25) are arranged opposite to each other. Luminaire according to claim 13,
characterized,
in that the centering device (25) is formed by a centering recess (25a) and a yarn-embracing centering pin (25b), wherein the centering pin (25b) is preferably arranged, in particular glued, to the inside (6b) of the cover (6). Luminaire according to one of the preceding claims,
characterized,
in that a circumferential sealing element (21) is arranged between the edge region and the cover (6) in the edge region of the housing trough (2). Luminaire according to one of the preceding claims,
characterized,
that at the free edge of the housing trough (2) an inner edge strip (2h) is arranged, which is preferably recessed. Luminaire according to claim 15 and 16,
characterized,
that the sealing element (21) in the recessed region of the inner edge strips (2h) is arranged. Luminaire according to one of the preceding claims,
characterized,
that the cover (6) by a preferably flat plate (6a) is formed. Luminaire, in particular according to one of the preceding claims,
characterized,
in that a plurality of reflectors with different reflector properties are provided, which can optionally be mounted in the housing trough (2), and a plurality of connection elements for elongated light sources are arranged in the front end region of the luminaire, which can optionally be equipped with a light source.

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