DE20212411U1 - recessed light - Google Patents

Description

FKB GmbH, 78727 Oberndorf (DE)

Description: Recessed luminaire

The invention relates to a recessed luminaire in which elongated luminous bodies, in particular
Fluorescent tubes, with the associated holding devices
and ballasts are housed,
The front opening of the housing is closed by a
A translucent pane made of glass or acrylic glass arranged within a flat, laterally outward-projecting mounting frame is tightly sealed and a rear panel attached to the rear of the housing walls closes a rear housing opening.

Such recessed lights are usually installed in machine tools, which are mounted in the housing wall in which
this recessed luminaire is to be mounted, appropriate
have rectangular recessed openings. In order to fix the housing of the recessed luminaire to the
to the housing wall of the machine tool

Neymeyer & Partner GbR, patent attorneys

78052 Villingen-Schwenningen (DE)

The luminaire housing is provided with a surrounding mounting frame which, depending on the application, either sits on the outside of the machine housing or can be placed on the inside in order to be fastened with screws that protrude through both the edge of the luminaire housing and the wall of the machine housing.

In known recessed lights of the generic type, the housing consists of a one-piece plastic body with four side walls running parallel to each other at right angles and in pairs. The rear edges of the walls are each provided with inward-projecting strips to which a rear wall can be attached. The front ends of the side walls are each provided with glass support strips that protrude outwards or inwards at right angles, on which a glass pane can be placed. The actual fastening element is a metal frame that encloses the glass support strips on all sides and which is provided on the front with a circumferential cover strip for the edge of the glass pane and with an outward-projecting stop strip. This stop strip is placed on the outside on the edge of the recess in the housing wall of the machine tool and is fixed there using screws.

Neymeyer & PARTNER GbR, Patent Attorneys 78052 Villingen-Schwenningen (DE)

Special fasteners are required to attach the luminaire housing to this mounting frame. A special deep-drawing mold is required for each housing size.

The invention is based on the object of creating a recessed luminaire of the type mentioned at the outset, the housing of which enables particularly cost-effective production in both small and large series, even with different embodiments and/or dimensions.

This object is achieved according to the invention in that the housing walls are formed from a metal extruded profile body which has on the inside and near the edge of a wall element extending over the height of the housing a glass support strip for the translucent pane that projects at least approximately at a right angle and on the outside of the same edge a right-angled edge strip that forms the flat support frame and whose opposite edge is provided with a screw channel for screwing on the rear wall.

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Neymeyer & Partner GbR, patent attorneys

78052 Villingen-Schwenningen (DE)

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While it is necessary to produce a mold or deep-drawing mold for all different sizes of the known recessed lights, the extruded body according to the invention, which is available by the meter, can be used to quickly and inexpensively produce housing sizes of any size. All that is required is to cut the required side walls to the mitre and length.

While the embodiment according to claim 2 serves to functionally place an adhesive bead (also called adhesive bead) for fastening the translucent pane to the glass carrier strip, the embodiment according to claim 3 offers the advantage that the translucent pane can be arranged and fastened both outside and inside the glass carrier strip.

The embodiment according to claim 4 achieves the advantage that a translucent pane placed on the outside of the glass support strip projects only minimally beyond the front plane of the edge strip and is enclosed all around over at least part of its thickness.

Neymeyer & Partner GbR, patent attorneys

78052 Villingen-Schwenningen (DE)

Due to the cross-sectionally tapered zone provided according to claim 5, which connects the edge strip to the wall element, the edge strip is given a certain flexibility, which enables it to adapt to any unevenness that may be present in a housing wall of a machine tool.

The support rib provided according to claim 6 offers a simple possibility to position a light guide or anti-glare grille in a functional manner.

While the embodiment according to claim 7 brings with it particular advantages with regard to stability and assembly, the embodiment according to claim 8 achieves smooth inner surfaces on the housing walls that extend to the rear wall.

The embodiment according to claim 9 enables the use of wire bow springs for fastening the recessed light in the wall of a machine tool housing, wherein the wire bow spring can be supported in a form-fitting manner in the longitudinal groove.

Neymeyer & Partner GbR, patent attorneys

78052 Villingen-Schwenningen (DE)

The design according to claim 10 not only makes it very easy to attach the translucent pane, namely a glass pane or an acrylic pane, to the glass support strips of the four housing walls running in one plane, but also eliminates the need for additional connecting means on the mitred abutting surfaces of the four side walls, since the translucent pane itself is used as a connecting element due to its adhesive connection to the four glass support strips.

The invention is explained in more detail below with reference to the drawing. It shows:

Fig. 1 the front view of the housing of a recessed luminaire;

Fig. la shows an enlarged view of a section Ia-Ia from Fig. 1;

Fig. 2 shows a section II-II from Fig. 1 in an enlarged view;

Fig. 3 in the same scale as Fig. 2 along the same section line II-II from Fig. 1 another

Neymeyer & Partner GbR, patent attorneys

78052 Villingen-Schwenningen (DE)

Type of fastening of the recessed luminaire to the housing wall of a machine tool housing;

Fig. 4 on the same scale as Fig. 2 along the same section line II-II from Fig. 1, another arrangement of the transmitted light panel and a different type of fastening to the housing wall of a machine tool compared to the embodiments in Figs. 2 and 3;

Fig. 5 shows an isometric exploded view of the individual components of the recessed luminaire according to Fig. 2;

Fig. 6 shows an enlarged section of the light guide grid from Fig. 5;

Fig. 7 is an isometric exploded view of the components of the recessed luminaire according to Fig. 4;

The recessed luminaire has a housing 1 shown in Fig. 1 in front view with a rectangular basic shape and pairs of parallel longitudinal housing walls 2 and 3 as well as transverse housing walls 4 and 5.

In this housing 1, on the inside of a rear wall 6, two fluorescent tubes 10 and 11 with the associated

Neymeyer & PARTNER GbR, Patent Attorneys 78052 Villingen-Schwenningen (DE)

tube base 12 and a ballast 13 .

The front opening 8 formed by the side walls 2 to 5 is sealed in all embodiments by means of a translucent panel 9, which can be made of glass or acrylic glass. In all embodiments, a light guide grid 14 is arranged between the fluorescent tubes 10 and 11 on the one hand and the translucent panel 9 on the other hand, which serves as a glare protection.

The four side walls 2 to 5 of the housing 1 each consist of a metal extruded profile body 20, which is shown in cross section in Fig. 1a on a scale of 2:1. This extruded profile body 20 has an inner side 21 and an outer side 22 and forms a wall element 23 extending over a housing height h with the surfaces of the inner side 21 and the outer side 22 running parallel to one another.

On the inner side 21 of the wall element 23, near the front edge, there is a glass support strip 24 for the translucent pane 9, which projects at right angles. On the same edge, on the outside, there is an edge strip 26 which projects at right angles and forms the flat support frame 25 of the housing 1. The opposite edge

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Neymeyer & Partner GbR, Patent Attorneys 78052 Villingen-Schwenningen (DE)

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edge 27 of the wall element 23 is provided with a screw channel 28, the inner surfaces of which are each provided with mutually offset thread profiles.

This screw channel 28 is used to screw the rear panel 6 provided with holes 51 to the housing walls 2 to 5.

The screw channel 28, which is open at the bottom, is arranged on a thickening 38 of the wall element 23 which projects on the outer side 22. This thickening 38 forms a shoulder which is provided with a longitudinal groove 39.

The glass carrier strip 24 has, along its longitudinal edge facing away from the wall element 23, two beads 29 and 30 which are arranged symmetrically to the imaginary center plane of its cross-sectional profile and which prevent an adhesive bed 32, with which the translucent pane 9 is attached to the glass carrier strip 24, from escaping beyond the edge.

The glass support strip 24 has a distance hl from the front face 31 of the wall element 23 or the edge strip 26, which is smaller than the thickness d of an external

Neymeyer & PARTNER GbR, Patent Attorneys

78052 ViUingen-Schwenningen (DE) .**..**. Ne -,&idiagr;2 /\ygust 2002

Translucent pane 9 mounted on the glass support strips 24.

At a distance h2, which corresponds to the thickness dl of the light guide grid 14, a support rib 35 is arranged below the glass support strip 24 on the inner side 21 of the wall element 23, which runs parallel to the glass support strip. This support rib 35 serves as a support for the light guide grid 14.

The edge strip 26 is connected to the wall element 23 via a cross-sectionally tapered zone 36 located between two notches 33 and 34 so that it has a certain flexibility and can adapt to the possibly uneven inner or outer surface of the edge of a mounting opening 40 in the housing wall 41 of a machine housing when screws 45 with or without nuts 46 are used for its fastening, as shown in Figs. 3 and 4.

In the sectional views of various embodiments or applications shown in Figs. 2, 3 and 4 on a scale of 1:1, the wall element 23 has a

Nevmeyer & Partner GbR, Patent Attorneys

78052 Villingen-Schwenningen (DE) .". .**.Ne-,"TCT^ygtfsj2002

Thickness d2 of 2.5 mm and a height h of 57.5 mm. With a thickness d of 5 mm, the height hl is 3 mm, with the two beads 29 and 30 each being 0.5 mm thick. The height h2 corresponding to the thickness dl of the light guide grid 14 is 10 mm in this embodiment.

With these dimensions and the features described above, the extruded profile body 20 is manufactured in a suitable aluminum alloy by the meter and kept in stock. To produce a housing 1 for a recessed light, the four housing walls 2 to 5 required are each mitred to the appropriate length from the extruded profile body 20 and assembled in the manner shown in Fig. 1, whereby one of the short side walls 4 or 5 is initially omitted. The other three walls are then screwed onto the rear wall 6 already fitted with the lamps.

The rear wall 6 is provided on its long sides with a border strip 16 or 17 bent forwards at a right angle (in the picture above), the height h.3 of which corresponds at least approximately to the height h.4 of the thickening 3 8 of the wall element 23 provided with the screw channel 28, so that its

NEYMEYER & Partner GbR, Patent Attorneys 78052 Villingen-Schwenningen (DE)

The right edge edges 18, 19 each end flush with the projection formed by the thickening 38.

When assembled, the two edging strips 16 and 17 enclose the outer thickenings 3 8 of the two longitudinal side walls 2 and 3, so that the fastening screws 50, for example of size M4, can be screwed into the screw channels 28 from below or from the rear through corresponding holes 51 in the rear wall 6.

It has already been described above that the rear wall 6 is already equipped with the side walls 2 to 5, the fluorescent tubes 10 and 11, their bases 12 and the ballast 13 before assembly.

In this pre-assembled state, the one narrow side wall 4 or 5 is also firmly connected to the rear wall 6 by screws 45 which are screwed into their screw channel 28 from below.

From the side of the short side wall 4 or 5, which is still missing in this state, the light guide grid 14 is then inserted and then also the still missing short side

Neymeyer & Partner GbR, patent attorneys

78052 Villingen-Schwenningen (DE) •j "'I .·%.··, Ne-,TZ.

tenwand 4 or 5 is positioned and screwed on from below.

In this state, the housing 1 only needs to be fitted with the translucent pane 9. To do this, the mitred abutting edges 55 of the individual side walls are pressed together using suitable means. In this pressed-together state, a continuous, self-contained bead or strand of adhesive is applied to the top or outside of the glass support strips, onto which the translucent pane 9 is then pressed with its edge surfaces until it assumes the correct position. By pressing the translucent pane 9 into the bead or strand of adhesive, the previously mentioned adhesive bed 32 is created. The adhesive, which usually hardens quickly, then creates the connection between the translucent pane 9 and the individual side walls 2 to 5, whereby the further cohesion of the mitred abutting edges 55 with the translucent pane 9 is ensured by this adhesive connection.

However, this procedure just described only applies to the embodiment of Fig. 4, in which the

NEYMEYER & PARTNER GbR, Patent Attorneys

78052 Villingen-Schwenningen (DE)

- 14 -

No -,

Translucent pane 9 is mounted on the outside of the glass support strips 24. In the embodiments of Figs. 2 and 3, however, the translucent pane 9 is arranged on the inside of the glass support strips 24 and embedded in the circumferential adhesive bed 32, which is also located on the inside.

With this arrangement of the translucent panel 9 on the inside of the glass support strips 24, it is necessary to insert the translucent panel 9 before screwing on the rear panel, since this is only possible when the housing is open at the rear.

With this arrangement of the translucent panel 9, the space between the translucent panel 9 and the space in the support ribs 35 is also reduced by about half. It is therefore necessary to shorten the ribs 36 (see Fig. 6) located on the outer sides of the light guide grid 14 accordingly, so that the position of the light guide grid 14 in the housing 1 shown in Figs. 2 and 4 is obtained.

As shown in Fig. 2, 3 and 4, the finished recessed luminaire can be installed in different ways in recessed openings.

Nevmeyer & Partner GbR, Patent Attorneys

78052 Villingen-Schwenningen (DE) ,: "·: ,*·,.··, Ne-, T2.Au§ast 2002

openings 40 of a housing wall 41 of a machine tool and fastened.

In the arrangement of Fig. 2, the recessed luminaire is inserted from the outside into a mounting opening 40 in the housing wall 41 of a machine tool and is fastened by means of wire clip springs 43 which are supported in the longitudinal grooves 39 and on the housing wall 41.

In this arrangement, the edge strips 26 rest on the outside on the edge of the installation opening 40 of the housing wall 41. The translucent panel 9 is expediently arranged on the inside of the glass support strips 24 so that it does not protrude into the plane of the outer surface 42' of the wall 41. This is also the case with the arrangement according to Fig. 3.

In this arrangement of Fig. 3, the edge strips 26 are each fastened by means of screws 45 which are screwed directly into threaded holes 47 of the housing wall 41.

In the arrangement according to Fig. 4, the recessed luminaire is arranged so that the edge strips 26 rest against the inner surface 42 of the housing wall 41 and are each fixed to it by

Neymeyer & PARTNER GbR, Patent Attorneys

r ·

- 16 -

78052 Villingen-Schwenningen (DE)

Screws 45 and nuts 46 are attached. It can be seen that in this arrangement the translucent pane 9 arranged on the outside of the glass support strips 24 is still located with its outer surface within the installation opening 40, i.e. it does not protrude beyond the plane of the outer surface 42' of the housing wall 41, which is a great advantage for the safety of a machine tool. For the same reason, in the arrangements of Fig. 2 and 3 the translucent panes 9 are arranged on the inner sides of the glass support strips 24.

Claims (10)

1. Recessed light, in which elongated luminous elements, in particular fluorescent tubes, with the associated holding devices ( 12 ) and ballasts ( 13 ) are accommodated in a square housing ( 1 ) which is open at the front and has housing walls ( 2 to 5 ) which are parallel in pairs, the front opening ( 8 ) of the housing ( 1 ) being tightly closed by a translucent pane ( 9 ) made of glass or acrylic glass arranged within a flat, laterally outwardly projecting support frame ( 25 ), and a rear wall ( 6 ) fastened to the rear of the housing walls closes a rear housing opening, characterized in that the housing walls ( 2 to 5 ) are formed from a metal extruded profile body ( 20 ) which has a glass carrier strip (23) which projects at least approximately at a right angle on the inside and in the front edge vicinity of a wall element ( 23 ) which extends over the housing height (h). 24 ) for the translucent panel ( 9 ) and on the same edge on the outside a right-angled edge strip ( 26 ) forming the flat support frame ( 25 ) and whose opposite edge ( 27 ) is provided with a screw channel ( 28 ) for screwing on the rear wall ( 6 ). 2. Recessed luminaire according to claim 1, characterized in that the glass support strip ( 24 ) is provided with at least one bead ( 29 , 30 ) along its edge facing away from the wall element. 3. Recessed luminaire according to claim 2, characterized in that the glass carrier strip ( 24 ) has a symmetrical cross-sectional shape. 4. Recessed luminaire according to one of claims 1 to 3, characterized in that the glass carrier strip ( 24 ) has a distance (h1) from the end face ( 31 ) of the wall element ( 23 ) which is smaller than the thickness (d) of the transmitted light pane ( 9 ). 5. Recessed luminaire according to one of claims 2 to 4, characterized in that the edge strip ( 26 ) is connected to the wall element ( 24 ) via at least one cross-sectionally tapered zone ( 36 ). 6. Recessed luminaire according to one of claims 1 to 5, characterized in that the wall element ( 23 ) is provided on the side of the glass support strip ( 24 ) with a support rib ( 35 ) running parallel to the latter. 7. Recessed luminaire according to one of claims 1 to 6, characterized in that the rear wall ( 6 ) has on both longitudinal sides a border strip ( 16 , 17 ) enclosing the wall element ( 23 ) in the region of the screw channel ( 28 ). 8. Recessed light according to claim 7, characterized in that the screw channel ( 28 ) is arranged in a thickening ( 38 ) of the wall element ( 23 ) projecting on the outside ( 22 ), which ends at least approximately flush with the edge of the edging strip ( 16 , 17 ) of the rear wall ( 6 ). 9. Recessed luminaire according to claim 8, characterized in that the thickening ( 38 ) on the outer side ( 22 ) of the wall element ( 23 ) forms a shoulder which is provided with a longitudinal groove ( 39 ). 10. Recessed luminaire according to claim 1 or one of claims 2 to 9, characterized in that the translucent panel ( 9 ) is attached to the glass support strips ( 24 ) of all four housing walls ( 2 to 5 ) by means of an adhesive bed ( 32 ) which is connected in particular to the joints of the mitred glass support strips ( 24 ).