RU2630895C2 - Assembled reflector for use in lighting device - Google Patents

Abstract

FIELD: lighting.

SUBSTANCE: reflector (1) forms a dome-shaped structure for accommodating at least one light source (100) and emitting light from said light source (100) through an opening of mentioned dome structure. The reflector comprises several segments (2-5) of the reflector, which are arranged so that together they form a dome-shaped structure. The reflector segments (2-6) comprise one central segment (2) of the reflector and four reflector peripheral segments (3-5) having a substantially identical shape and extending from the central reflector segment (2) to the opening of the dome structure, wherein at least two Of the indicated segments (2-5) of the reflector have different reflection characteristics. In this case, the two opposite peripheral segments (3) of the reflector have identical reflection characteristics. In two of the peripheral segments (3-5) of the reflector, on the sides that adjoin the central segment (2), one recess (7) is formed. These recesses (7), together with corresponding recesses formed in the central segment (2) of the reflector, form two openings (8) which are located opposite each other in the lower region of the dome structure.

EFFECT: expanded technical means.

5 cl, 1 tbl, 12 dwg

Description

The present invention relates to a reflector assembly for use in a lighting fixture intended for bright illumination of a target area, where the lighting fixture can be used for flood lighting, sports ground lighting and area lighting. In addition, the present invention relates to a method for controlling the light-emitting characteristics of a reflector assembly.

Lighting devices with incandescent or arc lamps are usually used to illuminate the facades of commercial establishments in order to improve the appearance of the institution at night and to increase interest in existing and potential customers in the goods and services of the institution. Restaurants and shopping centers are just some of the types of establishments for which external lighting devices play an important role in marketing and increasing sales. However, other objects, such as parking lots, sports stadiums or indoor arenas, usually require intensive lighting of certain areas, for example, to provide lighting that allows you to safely conduct a sporting event and provides good viewing conditions, both in terms of the visibility of a sporting event and in terms of the convenience of the audience.

For the above lighting purposes, reflectors are widely used that reflect light emitted from at least one light source. Reflectors are dome-shaped and focus the reflected light in the desired configuration and with the desired level of intensity, so that with minimal energy consumption, maximum illumination is achieved. Reflectors also serve to protect the light source, with some reflectors providing a protective sheath to protect the light source from bad weather, dust, moisture and the like.

In particular, in flood lighting systems used for the above purposes, the reflector is usually the only - or at least the most suitable - optical element of the lighting device, which is suitable to give the emitted light the desired configuration. Since depending on the purpose for which the lighting device is used, a very clearly defined light distribution with respect to the beam aperture and peak intensity are often desirable, flood lighting systems with a wide variety of reflectors are usually offered, which are then selected for specific application requirements.

Obviously, the manufacture and storage of a large number of different types of reflectors is undesirable. Because of the hollow, bulky shape, specialized equipment is usually required for the production of reflectors, and they occupy significant spaces after manufacture, which makes their manufacture, storage and / or transportation expensive. Especially in industrial type reflectors or reflectors for flood lighting systems, where light sources and associated reflectors are often relatively large, transportation and storage become a major cost item, but in addition, equipment for the manufacture of such reflectors, such as molds or the like, is dear.

Thus, there is a need to provide a solution to facilitate the manufacture of a reflector that could be used, in particular, in flood lighting systems, and would provide the desired specific characteristic of light emission.

In accordance with the present invention, the aforementioned goal is achieved by means of a reflector assembly as defined in independent claim 1 and by the method defined in claim 9. Preferred embodiments and further developments of the invention are the subject of the dependent claims.

The solution according to the invention is based on the idea of using a reflector, which contains several segments assembled together with the possibility of the formation, ultimately, of a reflective surface. By providing segments having different reflection characteristics, the light from a lighting fixture can be easily and efficiently adapted to lighting requirements for many applications. In particular, the “constructor” solution proposed in accordance with the present invention allows the manufacture of reflectors having different radiation characteristics by simply selecting a specific combination of reflector segments with suitable reflection characteristics. Moreover, the resulting reflectors - although they emit light in different ways - always have identical shapes and, thus, can be used with identical housings and / or support structures of the lighting device and preferably also with identical light sources. Accordingly, for the purpose of flood lighting at moderate cost, lighting devices can be obtained that have a wide variety of light emission characteristics and are thus suitable for various applications.

Thus, in accordance with the present invention, a reflector assembly is provided for use in a lighting device, in particular for flood lighting, sports field lighting and area lighting, where said assembled reflector forms a dome-shaped structure for accommodating at least one source light and light radiation of the specified light source through the hole of the specified dome-shaped structure, where the specified reflector contains several segments of the reflector, which are located ak, which together form a dome-shaped structure, and wherein at least two of said reflector segments have different reflection characteristics.

Preferably, the reflector segments are configured to form a continuous reflective surface on the inner surface of the dome structure. In particular, the segments of the reflector may have the form and devices designed to be connected to the adjacent segment so that a continuous and smooth transition between the two segments is achieved. Due to this, the resulting reflector assembly is almost identical to the whole reflector in terms of the quality of the reflective surface, but, obviously, can be manufactured in a much simpler and more efficient way.

More preferably, the reflector segments comprise one central reflector segment and at least two peripheral reflector segments extending from the central reflector segment to the light emitting hole of the dome structure. The central segment of the reflector thus forms the base element of the reflector assembly of the invention and provides a reflective surface that is located behind the light source. In contrast, the peripheral segments of the reflector form reflective surfaces on the sides and in front of the light source and are mainly responsible for giving the emitted light the desired shape. By selecting peripheral segments of the reflector with specific reflection characteristics, the light distribution can be very effectively controlled.

According to a preferred embodiment of the present invention, the peripheral segments of the reflector are generally identical in shape. This solution not only reduces the number of different parts to a minimum, but also simplifies the assembly of the final structure of the reflector.

In another preferred embodiment of the present invention, said reflector segments comprise one central reflector segment and four peripheral reflector segments, where, in particular, two opposite peripheral reflector segments have identical reflection characteristics. In almost all applications of the complete reflector according to the invention, it is desirable that light be emitted symmetrically on both sides of the lighting device. This characteristic can be achieved by providing two opposite peripheral segments of the reflector, which form the side reflective surfaces and their reflection characteristics are identical. In contrast, the other peripheral segments of the reflector form the upper reflective surface and the lower reflective surface, and are individually selected so as to ultimately form a beam of emitted light. The reflection characteristics of these two additional segments may differ from each other, but also from the reflection characteristics of the two side segments.

It is also preferred that said reflector segments are configured to form at least one hole in the reflective surface for inserting or fixing the light source. Like a classic solid reflector, the longitudinal light source is preferably located within the reflector, so that it passes through the lower part of the dome structure. Two holes located in this lower part of the reflector provide the passage of the ends of the light source to the lamp clips that are located around the reflector. Alternatively, the fixing structure for fixing the light source can pass through the hole (s) in the interior of the reflector dome to securely fix the light source.

Further, the present invention and its advantages are explained in more detail with reference to the accompanying graphic materials.

In FIG. 1-3 shows the idea of the invention of a multi-component reflector assembly;

in FIG. 4-7 show different views of the peripheral segment of the reflector used in the reflector assembly according to the invention;

in FIG. 8 and 9 show exploded views of the final reflector assembly;

in FIG. 10 and 11 show an assembled reflector according to the invention;

in FIG. 12 shows a floodlight comprising a complete reflector according to the invention.

The idea of the invention is first explained with reference to FIG. 1-3, which show different types of rotary dome-shaped reflector assembly, comprising five separate reflector segments and one additional optional reflector segment assembled into a dome structure. In these figures only the light source and reflector segments are shown, but no additional elements serving to connect the segments to each other. These additional elements for the final formation of the reflector are shown in the following figures and are explained below.

As mentioned above, the idea of the invention is based on the idea of using a reflector, which contains several segments assembled with each other with the formation of ultimately a reflective surface. Using reflector segments with different optical characteristics, a wide range of light distributions can be obtained for different purposes of flood lighting.

In the embodiment shown in FIG. 1-3, the reflector 1 consists of a unit of five different parts or segments 2-5, preferably made of aluminum with high reflectivity. In particular, the reflector 1 comprises a central part formed by one central segment 2 of the reflector and a surrounding reflective surface extending from the central part to the hole of the reflector 1, which is formed by four peripheral segments 3-5 of the reflector. When assembled, these reflector segments 2-5 provide a continuous concave shape, as in a conventional solid reflector. If necessary, you can add the sixth segment 6 of the reflector, which passes through the inner part of the dome structure and forms a deflector. This optional deflector segment 6 is used, for example, in the case where a strong asymmetric distribution of light is required.

In the preferred embodiment shown in the figures, the four peripheral segments 3-5 of the reflector are almost identical in shape, with one segment of the reflector shown separately in FIG. 4-7. It forms a quarter of the rotary dome structure and, thus, shows rotational symmetry with respect to the axis I passing through the center of the reflector assembly perpendicular to the hole of the reflector (see Fig. 2). Thus, the four peripheral segments 3-5 of the reflector form in a final assembled form a smooth and continuous reflective surface for distributing the light emitted by the light source 100 in a desired manner.

Although it has been explained above that the peripheral segments 3-5 of the reflector have an almost identical shape, it should be clarified that this explanation relates to the general appearance of the reflective surface of the segments. As shown in FIG. 1-3, the segments 3-5 of the reflector may differ slightly from each other in the part adjacent to the central segment 2 of the reflector. In particular, preferably, in one of the peripheral segments of the reflector, on the sides adjacent to the central segment 2, there is one recess 7 (see FIGS. 4-6) having approximately the shape of a semicircle. Together with the corresponding recesses made in the central segment 2 of the reflector, they form two circular holes 8, which are located opposite each other in the lower region of the dome of the reflector, and can be used to insert a light source 100 or to pass the supporting elements from the outer part of the reflector 1 through the holes 8 into the interior of the reflector 1 to fix the light source 100 therein. Preferably, these semicircular recesses 7 are cut into the reflector segments after the manufacture of the segments, and only one single mold is required for the manufacture of the peripheral reflector segments.

Although the four peripheral segments of the reflector have an almost identical shape, they are usually made of different materials, and they thus have different optical characteristics. By combining reflector segments from different materials, the resulting light distribution and intensity can ultimately be adjusted to meet the requirements of flood lighting.

The effect of the change in reflector material for different segments can be seen in the following table, which shows the peak intensity (in cd / cm) in the target zone and the resulting beam shape for different material combinations. In all examples, an identical light source was used:

The letters in the above table refer to different segments of the reflector as follows:

R: center segment (2) of the reflector

S: side reflector segment (3)

T: reflector upper segment (4)

B: reflector bottom segment (5)

D: reflector deflector segment (6).

The results summarized in this table clearly show that the selection of material for different segments of the reflector has a significant effect on the resulting light distribution. Thus, it is indeed possible to adjust the characteristics of the reflector by combining different materials in a certain way, although the shape of the segments of the reflector is always identical. Moreover, not only the shape of the reflector segments remains unchanged, but also the resulting shape of the final assembled reflector is always the same. Accordingly, all additional elements of the lighting device, in particular, means for connecting the reflector segments to each other, as well as the locking structure for fixing the reflector within the lighting device, are generally the same and can be used in all cases, regardless of the actual characteristics of the reflector. Thus, based on the present invention, it is possible in an economical manner to obtain floodlights having very different characteristics.

Although so far only the general idea of combining reflector elements to create a complete reflector dome has been shown in the figures, in FIG. 8-11 show in more detail the connection of segments with each other.

In particular, exploded views of FIG. 8 and 9 show that two adjacent peripheral peripheral segments 3-5 of the reflector are mutually connected by a connecting element 10, which extends over the entire area of the connection along the outer surface of the two segments 3-5. The connecting elements 10 provide mounting segments 3-5 reflector in an adjacent position and the absence of gaps between two segments 3-5. In this way, the desired smooth and continuous reflective surface is achieved.

An end plate 12 is provided in the bore of the reflector, having in the shown example a square external shape and a round hole corresponding to the opening of the dome formed by the peripheral segments 3-5 of the reflector. This end plate 12 stabilizes the dome structure and connects the reflector segments 3-5, as well as the end parts of the connecting elements 10. In this regard, the peripheral reflector segments 3-5 preferably have flange end parts 9 allowing the reflector segments 3-5 to be attached to the end plate 12 bolts or screws 13.

In the lower part of the reflector 1, the central segment 2 of the reflector is closed by a lower cap 15 stabilizing this lower region of the reflector 1, slightly covering the end regions of the peripheral segments 3-5 of the reflector with the extreme part 16 of the flange. The end part 16 of the flange is also made with the possibility of connection with four connecting elements 10 by using additional bolts or screws 13 and contains two side holes 17 located at the same level with the holes 8 in the dome of the reflector. The ultimately obtained reflector 1 is shown assembled in FIG. 10 and 11, and demonstrates stability sufficient for its further use in floodlights, as well as an excellent optical reflective surface. Ultimately, it can be inserted into the housing or support structure to create a floodlight 110, as shown in FIG. 12.

Several alternatives to the preferred embodiment shown in the figures are possible. In particular, means for interconnecting the segments and stabilizing the structure of the reflector, of course, can be performed in an alternative way.

Moreover, the dome structure of the reflector may be formed by alternatively shaped reflector segments, and in particular, it is not necessary to use four peripheral reflector segments having the same shape. It is also possible, for example, to use only two peripheral segments of the reflector or to use even more segments that have different shapes, but, again, which can be assembled into the desired shape of the reflector. Further, the resulting reflector structure may differ from that shown in the figures, and may, for example, look more like a truncated pyramid or the like.

Obviously, the ability to control the optical characteristics of the resulting reflector is expanded if more reflector segments are used to form the dome of the reflector. On the other hand, prefabricated segments of the final structure in this case are more complex, and care must be taken to avoid gaps that can significantly degrade the optical characteristics of the reflector. In this regard, the embodiment shown is an ideal compromise, since the efforts required to manufacture the reflector are still small, and the optical characteristics of the reflector can nevertheless be regulated in a relatively wide range.

Claims (12)

1. The reflector (1) assembly for use in a lighting device (110), in particular, for the purpose of flood lighting, lighting of sports fields and zone lighting, wherein said assembled reflector (1) forms a dome-shaped structure for accommodating at least one light source (100) and light radiation of said light source (100) through an opening of said dome-shaped structure, characterized in that the said reflector contains several segments (2-5) of the reflector, which are arranged so that together form a dome-shaped structure, and these segments (2-6) of the reflector contain one central segment (2) of the reflector and four peripheral segments (3- 5) a reflector having a substantially identical shape and extending from the central segment (2) of the reflector to the hole of the dome structure, where at least two of these segments (2-5) of the reflector have different reflection characteristics, wherein two opposite peripheral peripheral segments (3) of the reflector have identical reflection characteristics, at the same time, in two of the peripheral segments of the reflector, on the sides that are adjacent to the central segment (2), one recess (7) is made, moreover, these recesses (7), together with the corresponding recesses made in the central segment (2) the reflector, form two holes (8), which are located opposite each other in the lower region of the dome structure. 2. The reflector assembly according to claim 1, characterized in that the segments (2-5) of the reflector form a continuous reflective surface. 3. Reflector assembly according to any one of paragraphs. 1 and 2, characterized in that said reflector segments (2-5) are configured to form at least one hole in the reflective surface for inserting or fixing the light source (100). 4. Reflector assembly according to any one of paragraphs. 1 and 2, containing additional means for connecting the segments (2-5) of the reflector with each other. 5. A method of manufacturing a reflector (1) assembled in accordance with any one of paragraphs. 1-4, including the assembly of several segments (2-5) of the reflector together with the formation of a dome-shaped structure.

Images