DE102023103126B4 - Light-diffusing attachment for a lamp and lamp - Google Patents

Abstract

Light-scattering attachment (10) for a lamp (100), in particular a battery-operated lamp, comprising
a cylindrical, hollow base body (12) which can be coupled to a lamp base (50) in such a way that light emitted by a lighting means (60) attached to the lamp base (50) passes through the cylindrical base body (12) in the axial direction thereof,
a cover element (14) which contains at least one reflective region (15) in which the light passing through the base body (12) strikes the cover element (14) and which is designed to be reflective, and
one or more lamella bodies (16-1, 16-2) arranged between the cover element (14) and the base body (12),
wherein, viewed along the axial direction, the base body (12), the lamella body (16-1,16-2) and the cover element (14) are arranged from bottom to top,
wherein the reflecting region (15) is shaped such that it deflects the light incident on it,
wherein the lamella bodies are arranged in the attachment in such a way that the light reflected from the reflecting area at least partially strikes them before it leaves the area of the attachment and is radiated.

Description

field of the invention

The invention relates to a light-scattering and -directing attachment for a lamp, in particular a battery-operated lamp, and for example a table lamp, and to a lamp with such an attachment.

State of the art

There are a number of known lights where it is desired that the light emitted is directed in certain directions and that little or no light is emitted in other directions around the light. In table lights, for example, this is done so that the table is illuminated but the people sitting around the table are not blinded. In street lighting, the aim is to minimize light pollution and at the same time produce sufficiently bright light in the desired direction of illumination.

On the one hand, it is known to provide lighting devices that are already directed in themselves, for example LEDs (light-emitting diodes), which emit light from the lamp in a directed manner. Here, for example, light is emitted in essentially only one direction, possibly dampened by attachments or filters, without the direction of the light being significantly influenced. The light emitted from such lamps is not further redirected or shielded, but does not emerge in all spatial directions around the lamp, since its direction of emission is already directed.

On the other hand, it is known to shield light emitted by a lighting device in essentially all spatial directions, i.e. essentially spherically radially outwards, in certain areas by means of suitable shade attachments. For example, for table lamps, path lighting or street lighting, certain areas into which the light is emitted by a lighting device provided essentially centrally in the lamp are shielded by appropriate covers so that the light cannot escape there and no undesirable lighting or glare is generated.

Such lights can be designed either as battery lights or as conventional cable-connected lights. However, even in the area of battery lights, where one advantage is that they are independent of the installation location, the light is usually designed for a specific purpose and a specific type of installation location, e.g. as a table lamp. The direction of the light emission, glare-free areas, etc. are specified. Accordingly, the flexibility in terms of the intended use of such a light is limited and it can only be used for the specified, initially defined purpose.

An LED lamp with a base element and a rod-shaped element is known from AT 16 189 U1. An LED light source for generating light is provided on the base element. The rod-shaped element comprises an elongated light guide that extends upwards from the base element along a longitudinal axis and guides the light generated by the LED light source upwards. At the upper end, the light exits through an end face of the light guide. The light exiting at the upper end strikes an optical element or reflector arranged there, from where it is deflected into the lower and/or upper half-space. Ring-shaped regions can be provided along the rod-shaped light guide, which are structured in such a way that part of the light directed upwards exits through them. Such light exiting through the ring-shaped regions can be deflected downwards by means of deflection elements provided on these regions.

From the DE 90 13 023 U1 a floor lamp with a lamp base and a lampshade is known, with an upward-radiating slide projector mounted in the lamp base and a reflector arranged under the lampshade.

AT 118 387 B relates to a lampshade with several half-shell-shaped shades arranged overlapping one another with a corresponding holder.

From the DE 20 2016 103 661 U1 A lamp is known in which light is introduced into an axially extending light guide at the upper end of a base. At the upper end of the light guide, this branches out in a radial direction and guides the light radially outwards.

From the DE 25 46 216 B2 is a known garden lamp that has a casing with a hood that is closed at the top and light-directing ribs with sawtooth-shaped cross-sections arranged underneath, which are formed in one piece. Inside, the light source is arranged above the topmost guiding rib.

DE 20 2021 106 292 U1 refers to a cylindrical battery-powered lamp which has a bayonet lock at its upper end for attaching accessories such as filters.

task of the invention

Based on this, it is the object of the invention to provide an attachment for a lamp and a corresponding lamp, with the help of which the intended use of the lamp can be easily adapted.

representation of the invention

This object is achieved with an attachment having the features of claim 1 and with a lamp having the features of claim 12. Preferred embodiments are specified in the dependent claims.

The invention is based on the idea of making a conventional lamp, e.g. a battery-operated lamp that emits light in a certain spatial direction and is used, for example, to set light accents in event rooms, accessible for a different purpose by providing an attachment, for example as a table lamp. The invention is also based on the idea of modifying the defined light emission direction from the original lamp and adapting it to the new purpose by providing the lamp with an attachment that scatters light and redirects the light falling on it in a defined way. The light-generating lighting device is located outside the attachment, i.e. is not surrounded by it like a normal lampshade. By providing a simple and quickly detachable and attachable connection mechanism between the original lamp and the attachment, the set can be used flexibly depending on the desired purpose and can be switched between the purposes, e.g. as a floor lamp and as a table lamp. The original lamp serves as the lamp base with the lighting body of the entire arrangement.

In particular, a light-diffusing attachment for a lamp contains a cylindrical, hollow base body which can be coupled to a lamp base in such a way that light emitted by a lighting means attached to the lamp base passes through the latter in the axial direction of the cylindrical base body, a cover element which contains at least one reflective region in which the light passing through the base body strikes the cover element and which is designed to be reflective, and one or more lamella bodies arranged between the cover element and the base body, wherein the reflective region is shaped in such a way that it deflects the light striking it.

Here, the term "redirecting the light" means that at least part of the light striking the reflective area is not only reflected, i.e. its direction is reversed so that the direction of incidence of the light and the direction of exit of the light are parallel and/or coincide, but that the reflected light beam has a component at an angle to the direction of incidence of the light and is thus redirected or deflected. There is therefore an angle between the incident light beam in the reflective area and the exiting light beam from the reflective area that is not equal to 180°.

By arranging and shaping the reflective area in the attachment accordingly, the light entering the attachment can be given a new directional component by a lighting element arranged in a lamp base that is provided separately from the attachment. If the lamp base itself is designed as a lamp that can be coupled to the attachment, a new purpose can be assigned to the combination of lamp base and attachment compared to the original lamp with the lighting element by changing the direction of light emission, as the lighting effect is changed. If, for example, the lamp base designed as a battery-operated lamp radiates vertically upwards when it is set up and is thus used, for example, to set lighting accents in a room by setting it on the floor, the battery-operated lamp can be used together with the attachment as a table lamp, the light of which radiates downwards and to the sides when the lamp is set up, but is glare-free in the original direction of radiation.

The slatted bodies serve to further scatter the light and soften the reflected light beam. To this end, the slatted bodies are arranged in the attachment in such a way that the light reflected from the reflective area at least partially hits them and possibly passes through them and/or is scattered by them before it leaves the area of the attachment and is emitted by a lamp.

Preferably, the one or more lamella bodies each have the shape of side surfaces of a truncated cone, i.e. they are shaped as a truncated cone without end faces. Such a shape can scatter the light striking the lamella body from the reflective area well and evenly and is at the same time visually appealing. Particularly preferably, two lamella bodies are provided.

If several lamella bodies are provided, the diameters of the Front sides of the truncated cones of the lamella bodies are different. This means that, in particular, a diameter of the truncated cone pointing downwards during use is larger the further up the corresponding lamella body is arranged. The diameter of the truncated cone pointing upwards can be the same or different between the different lamella bodies. This means that, when there are several lamella bodies, the lamella bodies can have side surfaces of different inclines, which, in addition to a visually appealing appearance, leads to good and even light scattering. Preferably, the upper openings of the lamella bodies are each dimensioned and the lamella bodies are arranged in such a way that, when there are several lamella bodies, part of the light reflected from the reflective area passes through the upper openings of all the lamella bodies and another part of the reflected light only passes through part of the upper openings of the lamella bodies and strikes the side surface of a lamella body arranged underneath from the outside. Another part of the reflected light can only pass through a part of the upper openings of the lamella bodies and can then be emitted without further impact on a lamella body.

In a preferred embodiment, the at least one lamella body is made of translucent material, which further preferably scatters light. Alternatively, the at least one lamella body or all lamella bodies are preferably made of opaque material, e.g. sheet metal. In both cases, such lamella bodies or fins in conjunction with a suitable shape, for example as the truncated cones described, can produce a light throw of approx. 2 m in the radial direction around the lamp on the floor surface, which is ideal for table lighting, while at the same time a beautiful decorative effect is created by the mixture of reflections and shadows.

Preferably, the cover element is shaped as a concave shell in the direction of a lamp base. Together with the truncated cone-shaped slatted bodies, this creates a visually appealing appearance of the lamp or attachment and the light can be reflected when it hits the curved shell. For this purpose, either the entire shell can be designed as a reflective area, or just a part of it, onto which the light emitted by a lighting device in a lamp base hits.

Preferably, the cover element is made entirely of light-reflecting material, e.g. metal, and/or is colored accordingly, i.e. provided with a coating or similar. Metal as a material has the advantage that it is easy to shape, relatively insensitive to heat and cold, and also mechanically robust, so that, for example, if the light is to be used outdoors, the light or attachment can easily withstand the stresses that occur.

If a bowl is provided as a cover element, the concave area of the bowl can be provided as a reflective area. Preferably, however, the cover element has a convex area in the direction of the lamp base in the area in which the light passing through the base body strikes the cover element. With the help of such a convex area, which can be attached as a cover element within the concavity of a bowl, for example, the light striking the convex area can be deflected radially outwards, which is particularly advantageous if the light is to be directed radially outwards, e.g. if the lamp is to be used as a table lamp, and the attachment is rotationally symmetrical, with the light incident in a central area of the attachment.

Preferably, the base body is opaque in the radial direction. This means that the light entering the base body is transmitted through the lamp base in the axial direction, as a continuation of the lamp base. If the lamp base, which can itself be designed as a lamp or spotlight, is also opaque in the radial direction, the base body appears as a continuation of the lamp base and the attachment as an illuminated lampshade, which also has the function of redirecting and distributing the light from the axial direction to the radial direction.

The base body preferably has a connecting element with which the base body can be connected to a complementarily shaped connecting element on the lamp base. Especially if the lamp base itself is designed as a cylindrical, in particular circular-cylindrical lamp or spotlight with light emission in an axial direction, it can be converted into a largely radially emitting lamp, e.g. a table lamp, by simply combining it with the attachment using the connecting element. This makes such a lamp very flexible to use and can, for example, be used in the area of event organization without an attachment to set light accents on the floor or in the room and with an attachment as a table lamp.

The connecting element on the base body is preferably part of a bayonet lock, and a complementary part is then fitted on the lamp base a bayonet catch. A bayonet catch is a catch between two components that is easy to fasten and remove. One part, which is pushed over another part, has a longitudinal slot, at the end of which there is a short transverse slot at a right angle. The other part, on the other hand, has a button that is inserted into the transverse slot and then creates a firm connection. The connection is made using a plug-and-twist movement: the two parts to be connected are placed one inside the other. Elongated raised areas are attached to the connection point in both parts, almost perpendicular to the plugging direction. However, these do not run all the way around, but are interrupted to enable the parts to be plugged into one another. Since the raised areas are now slightly diagonal in the plane perpendicular to the plugging direction, a twisting movement presses both parts against one another.

Preferably, the part of the bayonet catch on the base body is designed as a ring with radially inwardly projecting projections that can be inserted into corresponding recesses on a ring provided on the lamp base, and the attachment can then be secured by twisting against the lamp base. Alternatively, the part of the bayonet catch on the base body is designed as a ring with radially outwardly projecting projections that can be inserted into corresponding recesses on a ring provided on the lamp base, and the attachment can then be secured by twisting against the lamp base. A double bayonet catch can also be provided on the lamp base, so that the attachment can be secured on the outer bayonet provided on a ring of the lamp base and an inner bayonet on the lamp base can be used for an additional filter element, a colored disc, etc. to set special lighting accents. A suitable bayonet catch is, for example, in the DE 20 2021 106 292 described.

Preferably, the base body of the attachment is circular-cylindrical and the attachment as a whole is constructed rotationally symmetrically to the axis of the circular cylinder. This enables a visually appealing light with uniform radiation in the circumferential direction.

It is particularly preferred to provide a lamp as a set with an attachment and a lamp base. It is further preferred that the lamp base is circular-cylindrical and the lighting means, more preferably LEDs, are arranged inside the circular-cylindrical lamp base.

The lighting means preferably has a light emission direction that is essentially parallel to the axial direction of the base body. If the lamp base is circular-cylindrical, the light emission direction is preferably also parallel to the axial direction of the lamp base.

Particularly preferably, the lamp base has a connecting element which is part of a bayonet lock, as shown above and e.g. in the DE 20 2021 106 292 described.

Short description of the characters

• 1 eine Seitenansicht eines Aufsatzes gemäß einer Ausführungsform ist;
• 2 eine Kombination aus dem Aufsatz aus 1 und einem Leuchtenfuß gemäß einer Ausführungsform in Seitenansicht zeigt;
• 3 eine Ansicht von unten auf die Kombination aus 2 zeigt;
• 4 eine perspektivische Ansicht auf die Kombination aus 2 ist;
• 5 in perspektivischer Ansicht die Kombination aus 2 mit abgenommenem Aufsatz zeigt;
• 6 eine Schnittansicht des Aufsatzes aus 1 ist; und
• 7 eine Seitenansicht entsprechend 2 ist, wobei eine Lichtführung schematisch dargestellt ist.

The invention is described below purely by way of example with reference to the accompanying figures, in which:

• 1 is a side view of an attachment according to an embodiment;
• 2 a combination of the attachment from 1 and a lamp base according to an embodiment in side view;
• 3 a view from below of the combination of 2 shows;
• 4 a perspective view of the combination of 2 is;
• 5 in perspective view the combination of 2 with the attachment removed;
• 6 a sectional view of the attachment 1 is; and
• 7 a side view accordingly 2 is, with a light guide shown schematically.

Description of preferred embodiments

1 and 6 show a light-scattering attachment 10 in side view and in section view.

The light-scattering attachment 10 is rotationally symmetrical to an axis A and points along the axial direction from bottom to top in 1 seen a base body 12, a lower (first) lamella body 16-2, an upper (second) lamella body 16-1 and a cover element 14. Each of the lamella bodies 16-1, 16-2 is designed as a truncated cone without end faces, with the cone tapering towards the top. The cover element 14 is designed as a shell that is open at the bottom. The base body 12 is designed as a hollow circular cylinder, on which, as best shown in 6 As can be seen, connecting struts 17 are provided to which the two lamella bodies 16-1, 16-2 and the cover element 14 are attached. In the embodiment shown, A total of three connecting struts 17 are provided at equal distances in the circumferential direction, ie at angles of 120° to each other (two of which are in 6 to see).

The connecting struts 17 are made as flat rectangular profiles, for example made of metal, to which fastening elements 18 are attached, e.g. by a screw connection or another suitable fastening means. The cover element 14 and the slatted bodies 16-1, 16-2 are also attached to the fastening elements 18 by suitable fastening means such as screws or an adhesive connection. The fastening elements provide a surface so that the slatted bodies 16-1, 16-2 and the cover element 14 can be firmly and reliably fixed in the desired position relative to one another and to the base body 12.

As in 1 and 6 As can be seen, the base body 12, the two lamella bodies 16-1, 16-2 and the cover element 14 are each arranged in the axial direction such that adjacent components overlap one another in the axial direction, ie that they are partially inserted into one another. The lower diameters of the cover element 14, the upper lamella body 16-1 and the lower lamella body 16-2 decrease from top to bottom when the attachment 10 is installed, ie the cover element 14 has the largest lower diameter and the lower lamella body 16-2 has the smallest. Likewise, the upper diameter of the upper lamella body 16-1 is larger than that of the lower lamella body 16-2. The height of the lamella bodies 16-1, 16-2 can, if as shown in the figures several lamella bodies 16-1, 16-2 are provided, each be the same or, as shown, different, so that a different inclination of the outer surface of the cone of the lamella bodies to the axis A is created. In the embodiment shown, the outer surface of the lower lamella body 16-2 encloses a smaller angle to the axis A than the outer surface of the upper lamella body 16-1. The lamella bodies 16-1, 16-2 can be made of any suitable material, optionally a translucent or opaque material, such as frosted glass, plexiglass, or of metal or sheet metal. They preferably have light-scattering properties so that the light striking them is diffused and thus becomes softer.

The cover element 14, which is shaped as a concave bowl, also has a reflective area 15 which is curved opposite to the bowl of the cover element 14, i.e. is convex in the direction of the base body 12, and which is arranged centrally as a bowl-shaped element in the middle of the cover element 14. The reflective area 15 can be made of reflective material or provided with a corresponding coating, e.g. white paint. It is also possible to design the entire cover element from the same material, such as metal and/or the same coating. The curvature of the reflective area 15 is selected and adapted so that light striking the reflective area 15 from below is reflected radially outwards and downwards, in a radius from the central axis A of the attachment 10 of, for example, approximately 1 m.

The base body 12 is designed as a hollow cylinder and has at its lower end a connecting element 13 to a lamp base 50 (in 1 and 6 not shown). The connecting element 13 is designed as part of a bayonet lock, namely as projections at three equally spaced positions in the circumferential direction, which protrude downwards in the axial direction and inwards in the radial direction. By means of the connecting element 13, the base body 12 and thus the attachment 10 can be connected to a lamp base 50, which has a corresponding complementary connecting element 52 (see for example 5 ) can be connected.

2 , 3 , 4 and 5 show a combination of a lamp base 50 and an attachment 10, so that a lamp 100 is formed, in side view, bottom view, perspective view and perspective view with the attachment 10 separated from the lamp base 50.

The lamp base 50 is designed as a battery-operated lamp, ie the lamp base 50 is in itself a cylindrical lamp or spotlight, the outer circumference of the surface area of the circular cylinder corresponds to that of the base body 12 of the attachment 10. The lamp base 50 can therefore also be used separately from the attachment as a battery-operated lamp. Alternatively, the lamp base 50 could also be a cable-connected lamp base. Lighting means 60, here LEDs, are provided inside the circular cylindrical lamp base 50, which emit light in the axial direction (see 5 ). The light emerges from the lamp base 50 upwards in the direction of the axis A according to the orientation in the figures and passes through the base body 12 of the attachment 10.

The lamp base also has the elements of one side of a double bayonet catch, whereby in the embodiment shown the inner ring of the double bayonet catch serves as a connecting element 52 to the base body 14, specifically the connecting element 13 of the base body 14. Alternatively, the outer ring could serve as a connecting element 52, so that for example color panes or similar can be inserted to achieve additional lighting effects.

7 shows schematically the light guidance through a lamp 100, which is made up of a lamp base 50, which is designed as a battery-operated lamp, and an attachment 10. The light emitted by the battery-operated lamp with LEDs as lighting means 60 forms an incident light beam L _E , which propagates parallel to the axial direction A of the lamp and strikes the reflective area 15. The light beam L _E is reflected at the reflective area 15 and forms a reflected light beam L _R directed downwards and radially outwards, so that it strikes a base on which the lamp 100 stands within a maximum radius of 1 m around the axis of the lamp 100. In this case, part of the reflected light L _R hits one of the slat bodies 16-1, 16-2, namely their outer surface, so that on the one hand it penetrates them, since they are made of translucent material, but on the other hand it is also diffused so that the light appears softer overall, but retains its brightness. Furthermore, since another part of the reflected light does not hit the slat bodies 16-1, 16-2, this part retains its luminosity and brightness, so that bright, but still pleasant, stylish lighting can be provided. In particular, a pleasant combination of shades and reflections of the light is created.

The invention is based on the idea of converting a conventional lamp that radiates in one main direction, for example only upwards, into a different type of lamp with other possible uses, which, for example, distributes the light evenly radially around the lamp. In addition to a special design for guiding the light, means are provided for a quick and uncomplicated connection to an attachment that can be combined with the original lamp.

Unlike conventional table lamps, the lighting is located outside the attachment, i.e. in the axial direction when the lamp is assembled, underneath the attachment, so that lighting is provided without glare. Since a conventional battery-operated lamp can be used as the lamp base, a programmable and remote-controlled, radial lighting of the surface, for example on a gala table, is achieved without glare.

It is explicitly emphasized that all features disclosed in the description and/or the claims are to be considered separate and independent of each other for the purpose of the original disclosure as well as for the purpose of limiting the claimed invention, regardless of the combinations of features in the embodiments and/or the claims. It is explicitly stated that all range specifications or specifications of groups of units disclose every possible intermediate value or subgroup of units for the purpose of the original disclosure as well as for the purpose of limiting the claimed invention, in particular also as a limit of a range specification.

list of reference symbols

10

light-scattering attachment

12

base body

13

connecting element

14

cover element

15

reflective area

16-1, 16-2

lamella body

17

connecting strut

18

fastener

50

lamp base

52

connecting element

60

lighting

100

light

A

axis

LE

incident light

LR

reflected light

Claims (15)

Light-scattering attachment (10) for a lamp (100), in particular a battery-operated lamp, containing a cylindrical, hollow base body (12) which can be coupled to a lamp base (50) in such a way that light emitted by a lighting means (60) attached to the lamp base (50) passes through the cylindrical base body (12) in the axial direction thereof, a cover element (14) which contains at least one reflective region (15) in which the light passing through the base body (12) strikes the cover element (14) and which is designed to be reflective, and one or more lamella bodies (16-1, 16-2) arranged between the cover element (14) and the base body (12), wherein the base body (12), the lamella body (16-1,16-2) and the cover element (14) are arranged from bottom to top when viewed along the axial direction, wherein the reflective region (15) is shaped in such a way that that it redirects the light that hits it, wherein the lamella bodies are arranged in the attachment in such a way that the light reflected from the reflecting area at least partially strikes them before it leaves the area of the attachment and is radiated. Essay (10) after claim 1 , wherein the one or more lamella bodies (16-1, 16-2) have the shape of side surfaces of a truncated cone. Essay (10) after claim 2 , wherein at least two lamella bodies (16-1, 16-2) are provided, wherein the diameters of the end faces of the truncated cones of the lamella bodies (16-1, 16-2) are different. Attachment (10) according to one of the preceding claims, wherein the at least one lamella body (16-1, 16-2) is made of translucent material which preferably scatters light. Attachment (10) according to one of the preceding claims, wherein the cover element (14) is shaped as a concave shell in the direction of a lamp base (50). Attachment (10) according to one of the preceding claims, wherein the cover element (14) is formed from reflective material. Attachment (10) according to one of the preceding claims, wherein the cover element (14) has a convex region in the direction of the lamp base (50) in the region in which the light passing through the base body (12) strikes the cover element (14). Attachment (10) according to one of the preceding claims, wherein the base body (12) is opaque in the radial direction. Attachment (10) according to one of the preceding claims, wherein the base body (12) has a connecting element (13) with which the base body (12) can be connected to a complementarily shaped connecting element (52) on the lamp base (50). Essay (10) after claim 9 , wherein the connecting element (13) on the base body (12) is part of a bayonet lock. Attachment (10) according to one of the preceding claims, wherein the base body (12) is circular-cylindrical and the attachment (10) is rotationally symmetrical. Lamp (100) comprising an attachment (10) according to one of the preceding claims and a lamp base (50). lamp (100) after claim 12 , wherein the lamp base (50) is circular-cylindrical and the lighting means (60) is arranged inside the circular-cylindrical lamp base (50). lamp (100) after claim 12 or 13 , wherein the illumination means (60) are LEDs whose light emission direction is substantially parallel to the axial direction of the base body (12). Lamp (100) according to one of the Claims 12 until 14 , wherein the lamp base (50) has a connecting element (52) which is part of a bayonet lock.

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