FI104124B - Electric lighting fixture with glare protection and ways of producing such glare protection - Google Patents

Abstract

Electric light fitting with anti-dazzle screen and method of producing such an anti-dazzle screen, which consists of an assemblage of transverse ribs (13) and longitudinal parts (attachment strips 9, bracing rib 17). According to the invention, the transverse ribs (13) and the attachment strips (9) are produced from a sheet metal blank (30) provided with recesses (20, 28, 29), the attachment strips beeing bent to form cover flanges (11) with locking tongues (12) and the transverse ribs being bent pairwise to a V-shape and a bracing rib (17) being embedded within recesses or cut-out portions (20) of the transverse ribs, projections (22) and tabs (24) reaching into the recesses (20) and into the interior of the bracing rib, which projections and tabs are bent to flush abutment against the inside of the bracing rib for holding safely together such an anti-dazzle screen, which is to be hooked on to a reflector (4) of the light fitting, the free longitudinal edges (5, 6) of which are claw-shaped. <IMAGE> <IMAGE>

Description

104124

ELECTRICAL LIGHTING EQUIPMENT AND A METHOD FOR MANUFACTURING SUCH SHADOW

The present invention relates to an electric lighting apparatus having a glare shield as defined in more detail in the preamble of claim 15. The invention further relates to a method according to the preamble of the first method claim for producing such a glare shield.

10 The glare shields required for lighting installations are either made in homogeneous units, e.g. by extrusion of plastic, or assembled by means of ribs with grooves, which are then attached to each other. These assembly methods usually produce a very unstable structure. Another disadvantage of the current 15 sunblinds is the very high cost of purchasing tools. Besides, it is difficult and expensive to change production to other products or products of different sizes. The glare shields are secured either by placing the glare shield at the edge of the body plane of the apparatus 20 or by attaching the glare shield by means of fasteners.

It is therefore an object of the present invention to provide an electric lighting apparatus comprising an inexpensive but simultaneously adhering glare shield, optionally made of sheet metal or plastic, without any loose parts, and with very low requirements for accuracy in installation ·: ··· and when used. I invent- :·.·. The purpose of the present invention is to further bring forth the advantageous and • ·, ·. : 30 appropriate ways to make such a glare • ·. In order to achieve these purposes, there is an invention

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t ·. · Electric light with glare protection according to »». , the hardware is primarily characterized by its special features. The features described in the characterization section of claim 1. The manufacturing process is characterized by the particular feature: the operations which are apparent from the first method requirement.

I · «« • · · • i «« «« «2 104124. The invention will be explained in more detail below with reference to the accompanying drawings. They shall include:

Figure 1 is a perspective exploded perspective view of an electric light fixture having a glare shield according to the invention; 6 shows a blank for a sunblind according to the invention.

Figure 1 shows a complete lighting apparatus according to the invention with a glare shield j 15. The hardware includes; e.g. a tube holder 2 with ends and a tube 3 arranged between the ends surrounded by an elongated reflector 4 resembling a bowl or chute, made of e.g. sheet metal and having longitudinally extending long sides downwardly from its ends, e.g. and then in an oblique upward and outward direction to the attachment edges 6.

The glare shield 7 according to the invention is arranged in the aperture 8 of the reflector and includes, for this purpose, a continuous fastening of the sides * *, · · ·. strips 9 which are preferably arranged in the same plane and • 1 are provided such that the planar parts 10 · · ... rotated away from one another are fixed in the same plane against the surfaces 5 · · · · · · 30. The plane members extend outwardly to form edges 6

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Correspondingly bent cover edges 11 arranged to be planarly parallel to the edges 6 and thus extending from one end of the apparatus to the other *:: ·; length of the hoist away from or preferably directly downwardly to the edges 11, 35 punched fastening tabs 12 are arranged «been hooked upon the flanges 6, optionally jousivaiku- • ·" Regulation by means of at least the second party of material · March 1 104 124 welfare or equivalent design flexibility.

In the transverse direction, transverse ribs 5 13 extending preferably between the planar portions 10, preferably spaced at the same distance, are preferably formed of the same piece with the planar portions 10 and edges 11. These transverse ribs preferably have a V-shaped profile forming the sides 14, wherein the common base 15 of the sides is preferably in the same plane as the planar portions 10 and the symmetry plane of each pedal 10 provided on the side is at right angles to the plane of the planar portions 10. However, slopes to different angles can also be considered here. The ends 16 of the transverse ribs taper, preferably straight or rounded toward the free longitudinal edges of the transverse ribs, preferably following the shape of the inner surface of the reflector 4.

Preferably, the transverse ribs are joined to one another by a longitudinally extending support rib 17, which is also substantially V-shaped in profile, however, the free long sides may be bent towards each other to form edges 18 which provide additional gripping and / or securing function. This support rib is secured inside the transverse ribs 13, but not primarily to their bottom 15, but is conveniently at a height of a few centimeters from the bottom 19 25. In the embodiment shown, the transverse rails and the support bar are essentially the same • I · ·. * · *. high, which results in the support bar extending slightly above the transverse bars. Of course, one can also think of · · ending the profile of the support bar or bars approximately at the same level as the transverse bars or possibly • · · "·, / even at a lower level.

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For securing the support rib, the transverse ribs are provided, for example, with V-shaped grooves in the central portion or with Stans-35 seams 20, whereby the lateral edges 21 of these grooves are preferably provided with protrusions 22 extending »1 /. 104124 for lateral bending on the inside of the support bar to thereby secure the support bar to the transverse ribs and also to reinforce the transverse ribs with each other and to reinforce the rigidity and torsion resistance of the entire sun visor. For the same purpose 5, a tongue 24 may extend from the bottom of the grooves 20 to engage a e.g. rectangular hole 25 at the bottom of the support rib i, inside or above which the tongues may be bent sideways | after inserting them.

10

It may be particularly advantageous if the glare blank shown in Fig. 6 as well as the strut blank is bent so that the transverse ribs and / or the strut are angled at an angle different from that of the finished shape 15 before assembly. In this way, the sides in connection with the fitting event can be forced into their attachment position with a certain tension or structural spring byte, i.e., contrary to a certain spring action, which ensures long-term attachment and guarantees additional rigidity. This is achieved in particular by compressing the respective side pairs at some stage of the installation process.

Figure 6 shows that a blank made of, for example, a metal plate can simply be provided with the necessary punches, so that the punching pattern can be easily and quickly modified to obtain the desired length

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SIA. After stamping, you only need to bend 4 · · ....: transverse ribs along the base lines 26 and bend laterally: v. along the bending lines 27, whereupon, or later, the edges 11 are provided with recesses 12, which are then bent inward to form a fastening member 12 previously shown and illustrated. It is also simple to bend the blank with the punches. f to maximize by first bending this blank into a support bar, and then v '35 securing it to the transverse ribs as described above. Because the support bar is open both outwards and axially ···. In the further direction, it is easy to introduce one or more working tools 104104 which bend the ribs and tabs of the transverse ribs towards the inside of the support bar, which is all that is required to manufacture and assemble the glare according to the invention.

5

Instead of the damper, the glare according to the invention can also be made of plastic, whereby it is also conceivable to fasten the parts by welding at the points of contact in addition to the above, by means of openings, grooves and projections and tongues therein.

The glare shield according to the invention is also very robust and resistant to torsional and bending stresses when using very thin plates.

15

The invention is not limited to the embodiment described above and shown in the drawings, which is to be considered only as an example which can be modified and supplemented in many ways within the scope of the inventive idea.

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Claims (9)

An electric lighting apparatus (1) having a sun visor (7), consisting of fastening strips (9) and transverse ribs (13) made of the same piece and having transverse ribs (13) of cross-section. V-shaped profiles with the lamp unit opening (8) and! a bottom (15) 10 approximately in the plane of the fastening strips (9), characterized in that the transverse ribs are also arranged to connect at least one support profile (17) with a profile of v-shape secured to the V-shaped groove (20) of the transverse ribs in its position by means of projections or tongues (22, 24) which are 15 of the same material as the transverse ribs and fastening strips, extending inwardly and through the apertures (23) thereon and bent sideways to ensure the attachment thus achieved that the apparatus (1) a luminaire tube clamp (2) and luminaire tubes (3) arranged between these ends, surrounded by an elongated reflector (4) resembling a bowl or chute, made of sheet metal, for example, and having downwardly extended long sides at their ends, e.g. surface (5) and then: 25 obliquely upwards in and out about the fixing edges (6), ·, · *; in the form that the glare shield (7) is arranged to be inserted into the opening (8) of the reflector (4) and includes, for this purpose, said fastening strips (9) which are lateral and arranged in a lateral direction. in the same plane and provided with · · · 30 such that the plane members (10) facing each other are fixed in the same plane direction against the surfaces (5), and that the plane members (10) extend outwards forming * * * V: cover edges bent in accordance with the mounting edges (6); (11) arranged to be planarly parallel to the mounting edges (6) • «· · 35 and thus extending either away from one end of the apparatus« · • »or preferably directly downwards, with the securing tabs ( 12) is arranged to engage kiinnitysreunoihin (6), optionally by means of a spring effect of at least the second party of material or equivalent structural flexibility. 5 Electric lighting installation according to claim 1, characterized in that said transverse ribs (13) are formed of the same piece with the planar parts (10) and the cover edges (11). 10 Electric lighting installation according to Claim 1 or 2, characterized in that the transverse ribs are connected to each other by said support rib (17) at their central part, wherein the free long sides are preferably bent towards each other 15 to form additional edges (18). fastening function. Electric lighting installation according to one of Claims 1 to 3, characterized in that the support strip is fixed inside the transverse ribs (13), preferably not to their bottom (15), but is suitably higher by a few centimeters from the bottom (19), and the support bar is preferably substantially equal to: · high, which means that the support bar extends slightly above the transverse bars. Electric lighting installation according to one of Claims 1 to 4, characterized in that the transverse ribs (13) are, for example, provided with the aforementioned central sections for fastening the support strip (17). V-shaped grooves or punches (20) having lateral edges (21) provided with said "M". Projections (22) intended to extend · · into said, e.g. : (23), and be bent inside the support bar to the side ··. 35 lugs for securing the strut to the transverse struts. Electric lighting installation according to Claim 5, 8 104124, characterized in that a tongue (24) extends upwardly from the bottom of the grooves (20) to engage, for example, a rectangular hole (25) at the bottom of the support bar, the tabs are bent-5 to the side after insertion. 6 104124 Method for producing a glare shield (7) for an electric light assembly (1) according to any one of claims 1-6, wherein the glare shield is formed by fastening strips (9) and transverse ribs (13), wherein the transverse ribs (13) and fastening strips are simultaneously formed of sheet material (30). provided with the necessary punches, wherein the punching pattern is modified to obtain lengths suitable for the conditions, so that, after punching, the blank sections for transverse ribs are bent along the base lines (26) and the blank sections for the side strips in the step, preferably, the edges (11) are provided with recesses (12), which are then bent inwardly to form the holding edges 20 (12), and to form the blank with the punches into the support rib (17), which is then secured to the transverse ribs. • *> t 25 A method according to claim 7, characterized by;; ·; that the blind (30) and the blind (17) · *. ·. bent so that the transverse rails (13) and / or the support bar • ·: (17), prior to their attachment, are inclined at angles which are *; ·] different from those at which they are completed • · «30 so that during installation with a certain tension or structural flexibility, in other words, against a particular spring action, forces the edges into their anchorage position and provides long-lasting anchorage and additional rigidity, whereby the respective edge portions, particularly in pairs, are pressed 35 against each other during installation. a A method according to claim 7 or 8, characterized in that the glare is made of plastic, whereby the parts are secured at their attachment points by welding, except for the described connection between the openings, the grooves and the projections and tongues thereon. 5