EP4616116A1 - Leuchte mit einer an einem gehäuse angeordneten linse oder abdeckung - Google Patents
Leuchte mit einer an einem gehäuse angeordneten linse oder abdeckungInfo
- Publication number
- EP4616116A1 EP4616116A1 EP25701970.3A EP25701970A EP4616116A1 EP 4616116 A1 EP4616116 A1 EP 4616116A1 EP 25701970 A EP25701970 A EP 25701970A EP 4616116 A1 EP4616116 A1 EP 4616116A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lens
- housing
- cover
- light
- luminaire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
- F21V17/162—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to traction or compression, e.g. coil springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/005—Sealing arrangements therefor
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to two or more of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to two or more of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
- G08B7/062—Signalling systems according to two or more of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources indicating emergency exits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
- F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
- F21S9/022—Emergency lighting devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/08—Refractors for light sources producing an asymmetric light distribution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- Luminaire with a lens or cover arranged on a housing
- the present invention relates to a luminaire having at least one lens or cover arranged on a housing of the luminaire or a housing part of the luminaire.
- the invention relates to an escape luminaire having a lamp and an emergency light lens designed to direct the light emitted by the lamp into a specific area to illuminate an escape route.
- a particularly preferred application of the invention is a so-called escape sign luminaire, which additionally also has an escape route lighting function.
- Reliable escape route lighting plays a central role in building safety concepts, as such lighting is essential for ensuring safe evacuation in an emergency. Clear lighting facilitates orientation and allows people to quickly and safely find the shortest route to the exits, even in the event of a power outage or smoke development. Therefore, appropriate escape route lighting is often combined with a graphic display of the direction of an escape route, which is why this type of escape route lighting is particularly used in so-called escape sign luminaires.
- Lighting directed in a specific direction is usually achieved using specially designed lenses that specifically redirect the light from an associated light source in a specific direction.
- the emergency light lens is mounted on or in the wall of a corresponding luminaire housing and aligned so that the light generated by the light source arranged in the luminaire housing is emitted in the desired direction. Since, depending on the application and installation situation, the emergency light lens must be aligned in a specific direction, it is often designed so that it can be rotated in the desired direction while still attached to the housing.
- a luminaire with such an emergency light lens is known, which is accommodated with its light coupling area in a receiving opening in a luminaire housing, wherein a light source is then positioned within the housing, which the emergency light lens.
- the emergency light lens is held in place on the luminaire housing by means of locking elements, with a flange-like section of the lens being in contact with the luminaire housing from the outside.
- a ring-like sealing element is often provided between the luminaire housing and the flange-like section of the emergency light lens, whereby the locked holder of the emergency light lens with the housing presses the lens towards the sealing element, thus creating a simple seal between the luminaire housing and the emergency light lens. In particular, this can prevent spray water striking the outside of the luminaire and thus the emergency light lens from penetrating the luminaire housing.
- the present invention is therefore based on the objective of providing a novel solution that enables a lens to be reliably and sealed within the housing wall of a luminaire.
- a lens to be reliably and sealed within the housing wall of a luminaire.
- an escape luminaire with improved protection against moisture ingress, while still maintaining the aforementioned adjustability of the emergency light lens, allowing escape routes to be reliably illuminated regardless of the specific mounting situation of the luminaire.
- an O-ring to seal the lamp housing with regard to the lens, wherein the sealing situation provided for this purpose is designed in such a way that when inserting or pressing the lens into a corresponding
- the O-ring rolls over a dead center on the outer circumference of the lens body and then clamps the lens in the holder to prevent it from falling out.
- the O-ring must first be placed in a starting position on the lens before the dead center. Due to the design of the lens, the O-ring then rolls into the desired mounting position when the lens is inserted into the housing or housing element. The lens then remains in the housing solely due to the frictional force of the squeezed O-ring. However, with a certain amount of force it can still be rotated so that - if required - the light output can be directed in the required direction, e.g. for escape route lighting.
- the inventive concept is not limited to the detachable arrangement of lenses on a luminaire housing, but can be used in a variety of ways.
- the inventive solution also allows for the detachable arrangement of a cover element on a luminaire housing, which allows access to components arranged within the housing if necessary.
- the present invention can also provide a cover that seals the housing, the removal of which allows access to a maintenance or configuration element arranged within the housing, for example, a fuse, a battery, or a switch for setting parameters.
- a luminaire which comprises: a) a housing or housing element which has a receiving opening for receiving at least part of a lens or a cover; b) a lens or cover which can be fastened to the receiving opening;
- the receiving opening of the housing or housing element forms a hollow cylinder-like receiving area in which, in the mounted state of the lens or cover, a rotationally symmetrical bearing area of the lens or cover is rotatably positioned, • wherein a circumferential seal in the form of an O-ring is arranged on the outer circumference of the bearing area of the lens or cover, which seal is effective between the housing or housing element and the lens or cover,
- bearing area of the lens or cover has a first circumferential groove or constriction for receiving the O-ring in an initial position and, axially offset therefrom, a second circumferential groove or constriction for receiving the O-ring in an assembly position,
- first and second circumferential groove or constriction are separated from one another by a protrusion defining a dead center, and the O-ring rolls from the first circumferential groove or constriction over the dead center into the second circumferential groove or constriction when the lens or cover is inserted into the receiving area.
- the advantage of the solution according to the invention is that a sealed arrangement of the lens or cover in the luminaire housing can be achieved very easily, so that in this area the housing is sufficiently well protected against the ingress of dust and/or moisture, thus meeting the requirements for a so-called higher protection class. Due to the special design of the lens or cover, it is possible for this and the luminaire housing, or the luminaire housing part holding the lens or cover, to be manufactured very easily and reliably using an injection molding process, thus reducing the complexity and manufacturing costs.
- the elevation forms a ramp leading from the first circumferential groove or constriction to the dead center, via which the rolling of the O-ring during insertion of the lens or cover into the housing or housing element is facilitated.
- the elevation additionally forms a further ramp leading from the second circumferential groove or constriction to the dead center, wherein, however, this further ramp is preferably designed to be steeper than the first ramp leading from the first circumferential groove or constriction to the dead center.
- the receiving area of the housing or the housing element has an inwardly projecting small projection or web on a peripheral wall of the receiving opening, which correspondingly supports the rolling along the bearing area of the lens or cover between the two grooves.
- the seal acting between the lens or cover and the housing is solely responsible for reliably holding the lens or cover in the housing or housing part. It also exerts a certain frictional force, which prevents the lens or cover from being rotated without considerable effort. Ideally, this frictional force is so great that simply grasping and twisting the lens or cover is not possible; instead, the use of an appropriate tool is required. Accordingly, it can be provided that one or more indentations are formed in an area of the lens or cover that protrudes outward beyond the housing element. These indentations enable the lens or cover inserted into the housing element to be rotated and/or removed using only a suitable tool. These indentations are preferably slot-shaped.
- the lens or cover can then be rotated and/or removed from the housing, ensuring that it permanently remains in the desired position and orientation.
- the projecting region of the lens or cover can have a collar, wherein at least some of the indentations are preferably formed on the outer circumference of the collar.
- the inventive concept is applicable to all types of luminaires in which one or more lenses are to be reliably sealed in the wall of the housing or a housing part of the luminaire.
- the luminaire is a so-called escape luminaire, which is used for escape route illumination and in which the lens(es) are used to direct light in the direction of an escape route to be illuminated.
- the lens(es) can be designed in such a way that the light is emitted asymmetrically in a specific beam direction.
- the escape luminaire is an escape sign luminaire which, in addition to the illuminant for the escape route lighting, also has further illuminants with the aid of which an escape route symbol is illuminated.
- This can, in particular, be an escape sign luminaire based on known fiber optic technology.
- the luminaire preferably has a fiber optic element which forms a plate-shaped light guide into which the light from the additional illuminants is coupled.
- the aforementioned light guide element can also form part of the housing or a cover for the luminaire housing, with the light guide element preferably forming the housing element on which the emergency light lens is arranged.
- This results in a very simple design of the escape sign luminaire which nevertheless efficiently combines the graphic representation of an escape route with illumination of the escape route and, moreover, reliably seals the luminaire housing. In particular, this ensures that the luminaire also meets the requirements for a higher protection class (IP class).
- IP class protection class
- the luminaire according to the invention can also have multiple lenses with associated light sources.
- the use of multiple emergency light lenses is particularly useful, since regardless of the respective installation situation, at least one of the available emergency light lenses can be used for efficient illumination of an escape route.
- the luminaire has a sensor element arranged in the housing, which is positioned in the region of the receiving opening.
- This sensor element can in particular be a camera sensor or a PIR sensor, wherein the lens fastened in the manner according to the invention then serves as the optics for the sensor element.
- a maintenance or configuration element for example a fuse, a battery, a switch for setting parameters or a memory (e.g. in the form of a memory card), is arranged in the housing, wherein the maintenance or configuration element is accessible via the receiving opening closed by the cover, for example in order to carry out maintenance work, read out data or perform an update.
- the element protected by the cover according to the invention could also be a communication module, for example an NFC antenna or a Bluetooth module, which should also be accessible if necessary.
- Figure 1 shows a particularly preferred application example of the present invention in the form of an escape sign luminaire which is designed according to the present invention and in which emergency light lenses for escape route lighting are arranged on a luminaire housing according to the solution according to the invention;
- Figure 2 is a view of the underside of the escape sign luminaire of Figure 1;
- Figure 3 shows a view of a light guide element which serves to hold the emergency light lens according to the invention
- Figure 4 is an enlarged view of the light guide element with corresponding receptacles for two emergency light lenses
- Figure 5 is a view of the light guide element from the top;
- Figures 6 and 7 are perspective views of a lens according to the invention, with the Ci-ring in the mounting position.
- Figure 8 is a sectional view of the emergency light lens attached to the light guide element before its assembly
- Figures 9a and 10a are side views of the emergency light lens with the O-ring in the initial position and the assembly position, respectively;
- Figures 9b and 10b are sectional views of the emergency light lens attached to the light guide element or inserted into the light guide element;
- Figures 9c and 10c are each enlarged representations of parts of Figures 9b and 10b;
- Figure 11 shows a further embodiment of a luminaire according to the invention, in which access to a functional part underneath can be obtained with the aid of a detachably fastened cover;
- Figures 12 to 14 show a further embodiment in which production-related openings in a luminaire housing are closed in a detachable and sealed manner with the aid of corresponding covers.
- Figures 1 and 2 show two views of an escape sign luminaire designed according to the invention, generally designated by reference numeral 100, i.e., an escape sign luminaire in which the direction of an escape route is indicated by means of an illuminated pictogram and, at the same time, the escape route is also specifically illuminated by additional lighting means.
- reference numeral 100 i.e., an escape sign luminaire in which the direction of an escape route is indicated by means of an illuminated pictogram and, at the same time, the escape route is also specifically illuminated by additional lighting means.
- inventive concept for the optimized mounting of at least one lens can also be used for other types of luminaires.
- the inventive solution can always be used when lenses are to be arranged in a sealed manner on the housing wall of a luminaire, ideally rotatably.
- the inventive solution can also be used, for example, in Floor-standing, ceiling-mounted, suspended, or recessed luminaires are used that are not necessarily used to illuminate escape routes, even if the invention is explained below in particular with reference to the illustrated escape sign luminaire.
- a cover can also be detachably attached to a luminaire housing in a similar manner, through which access to components located within the luminaire can then be obtained.
- the illuminated indication of the direction of the escape route is provided by means of a pictogram element 90, which is arranged on a flat side of a plate-shaped light guide, which will be described in more detail below.
- Light is coupled into this light guide from a narrow side, which is then distributed as evenly as possible across the entire surface via multiple reflections in a known manner and then emitted via the flat side on which the pictogram element 90 is located.
- the pictogram element 90 is formed by a film or a thin plate-like part, which is arranged on the outside of a so-called light guide element 10 and fastened there in a suitable manner.
- this aspect plays a rather subordinate role for the present invention, and the implementation of the pictogram and its arrangement on the light guide element 10 could be carried out in different ways. Direct printing of the light guide would also be conceivable in principle.
- the light coupled into the light guide element 10 originates from elongated light sources, which can be formed, for example, by a linear arrangement of LEDs arranged within the housing 60 of the luminaire 100.
- the positioning of the LEDs is such that the light is coupled as efficiently as possible, i.e., completely, into the light guide element 10 and then emitted via its flat side.
- the light guide element 10 can have corresponding output structures in the area of the pictogram 90, which no longer totally reflect incoming light rays, but rather redirect them such that they can exit the light guide element 10. The positioning of these output structures depends on whether corresponding pictograms 90 are arranged on one or both sides of the light guide element 10.
- the housing 60 which extends along the longitudinal axis L defined by the LED lamps, not only the lamps are arranged.
- This can, in particular, be a suitably designed converter that supplies the preferred LEDs with a voltage suitable for their operation.
- Emergency power supplies in the form of batteries or accumulators can also be arranged within the cuboid-like housing 60, which is then attached, for example, to a ceiling or another suitable support element.
- the aforementioned light guide element 10 is shown in isolation in Figure 3. It is preferably a one-piece component which, in addition to transmitting and distributing the light emitted by the LED lamps, also fulfills other functions.
- the light guide element 10 essentially consists of three regions or sections, namely a light coupling section 15, a light guide section 20, and a cover 25. All three sub-regions are preferably integrally connected to form a one-piece component, which is manufactured in particular by injection molding. In principle, it would be conceivable for the three sub-regions to be made of different materials; for example, the cover 25, explained in more detail below, could be made of an opaque material.
- the light guide element 10 according to the invention will consist entirely of the same, preferably clear, plastic material, with PMMA or PC being particularly suitable for this purpose.
- the task of the light coupling section 15 is to absorb and transmit the light emitted by the LEDs as completely as possible.
- the web-like light coupling section 15 has a narrow end face 16 on its upper side, which faces the LEDs and is positioned such that their light can enter the light coupling section 15 with as little loss as possible. If necessary, the end face 16 can also have additional structures tailored to the LEDs, such as lenses or the like, in order to further improve the efficiency of the light coupling.
- the light guide section 20 which follows the light coupling section 15 and is designed as a conventional flat light guide.
- the light guide section 20 is thus plate-shaped in such a way that light is totally internally reflected several times, thus being transmitted and evenly distributed within the light guide section 20. The light can then be emitted uniformly over one or both flat sides 21 of the light guide from section 20 using the light output structures already mentioned.
- the transition area between the light coupling section 15 and the light guide section 20 is bordered by the third area of the light guide element 10, namely the cover 25.
- the light guide element 10 also simultaneously forms part of the housing of the luminaire 100.
- the cover 25 of the light guide element 10 serves to close the open underside of the actual housing 60 of the luminaire 100. Adjacent to the light coupling section 15 and the light guide section 20, the cover 25 initially forms a cover area 26 oriented perpendicularly thereto, which forms the underside of the housing when the light guide element 10 is mounted on the housing 60.
- this cover area 26 therefore correspond to the dimensions of the further housing 60, whereby here too the most tight connection possible between the cover 25 and the housing 60 is desired.
- a vertically extending web 28 is formed around the edge of the cover area 26, which, when mounted on the housing 60, engages in a corresponding annular channel of the housing 60 (see, for example, Figure 8).
- a seal can be positioned in this seal, into which the upper end of the web 28 dips, so that an extremely efficient connection is achieved in the transition area between the housing 60 and the cover 25, which prevents the penetration of dust, but in particular also of moisture and splash water.
- Corresponding locking or clamping elements can also be formed on the cover 25, with the aid of which the light guide element 10 is fastened to the luminaire housing 60.
- the cover 25 also serves to hold the emergency light lenses 40 used for escape route lighting.
- These are arranged in the horizontal cover area 26 laterally next to the centrally running light guide section 20 and are designed in a known manner such that they emit light in a targeted manner in a specific direction, for example to illuminate an escape route running below or diagonally below the luminaire 100.
- further illuminants are arranged inside the luminaire housing 60, which are assigned to the emergency light lenses 40 and can optionally can be activated to illuminate an escape route with the aid of an emergency light lens 40 assigned to it.
- the horizontal cover section 26 of the cover 25 has a total of three receptacles 30 for holding associated emergency light lenses 40, wherein in Figure 2, the two upper receptacles 30 are equipped with emergency light lenses 40, and the lower receptacle 30, the design of which will be described in more detail below, is shown without an associated lens 40. It should be noted that during later operation of the luminaire 100, all three receptacles 30 will be equipped with corresponding emergency light lenses 40, although not all emergency light lenses 40 necessarily have to be used simultaneously for the actual illumination of the escape route.
- the cover 25 could also provide four receptacles for emergency light lenses 40 or just two receptacles 30 positioned diagonally opposite one another.
- This plays a rather minor role for the present invention, since it is primarily concerned with the task of reliably attaching the lenses 40 to the associated receptacles 30 in such a way that they can be aligned as desired while still achieving a permanent, reliable seal between the emergency light lens 40 and the housing 60 or the cover 25 for the housing 60. This will be explained in more detail below with reference to the additional figures.
- the basic shape of the lenses 40 is best seen in Figures 6, 7, 9a and 10a.
- the emergency light lens 40 according to the invention is similar to emergency light lenses already known from the prior art.
- the emergency light lens 40 shown in the figures therefore initially has a lens body 41, which is approximately conically shaped and forms a recess 42 at its upper end.
- the illuminant projects into this recess 42, which preferably formed by a high-performance LED, at least partially into it, so that the outer surface and the bottom surface of the recess 42 represent light entry surfaces of the lens body 41.
- the circumferential outer wall of the conical body then serves to direct incoming light rays downwards onto the light emission area by means of total internal reflection.
- the lens body 41 primarily serves as a collimator for the light typically emitted by the LED over a relatively wide angular range.
- the LED light directed toward the underside by this collimator, is then emitted via a Fresnel-like structure 45.
- This sawtooth-shaped structure 45 is provided with flanks such that the light rays are deflected accordingly and then emitted obliquely downwards in a preferred direction, as schematically indicated by the arrow in Figure 7.
- the light generated by the associated lamp can be emitted in a highly directed manner in a specific radiation direction A, along which an escape route runs, in order to illuminate it.
- a collar 46 is formed surrounding the Fresnel structure 45, which collar is of reduced height in the area corresponding to the direction A of light emission, so that undisturbed light radiation can occur here.
- the further area of this collar 46 forms a circumferential, approximately partially cylindrical outer wall, which is provided with two opposing slot-shaped indentations 48, described in more detail below.
- the corresponding design of the collar 46 makes it easier to recognize the direction of light emission in order to be able to arrange the emergency light lens 40 in the desired orientation on the luminaire housing 60 or the cover 25. Furthermore, the collar 46 prevents unwanted emission of scattered light in other directions.
- the bearing area 50 Adjoining the upper side of the collar 46 is the bearing area 50, which, when the emergency light lens 40 is mounted on the cover 25, engages in the receptacle 30 of the cover 25 and serves to support an O-ring 5 acting as a seal.
- the outer contour of this bearing area 50 is completely rotationally symmetrical, which facilitates the manufacture of the emergency light lens 40, which can be carried out, for example, within the framework of an injection molding process.
- the bearing area 50 forms two grooves 51 and 52 arranged one above the other in the axial direction of the lens 40, the configuration of which in particular from the enlarged sectional views in Figures 9c and 10c.
- Both grooves or constrictions 51, 52 are separated from each other by a single sawtooth-like protrusion 53, the tip of which defines a dead center 55, explained in more detail below.
- the design of the protrusion 53 is such that a first ramp is formed starting from the upper circumferential groove 51, and a second ramp is formed starting from the lower groove 52, the second ramp having a steeper gradient than that of the first ramp.
- a flange-like, outward-facing, circumferential projection 58 is also formed, which, as described in more detail below, serves as a stop element when inserting the emergency light lens 40 into the receptacle 30 of the cover 25.
- the receptacle 30 itself, it should be noted that it forms a corresponding circular receiving opening 31, which is enclosed by an annular peripheral wall 32.
- This peripheral wall 32 preferably extends into the interior of the luminaire, but could optionally also protrude to the underside beyond the horizontal region 26 of the cover 25.
- a projection or collar 35 projecting only slightly inward is formed, which supports the rolling of the O-ring according to the inventive procedure, as described in more detail below, and prevents the lens 40 with the O-ring 5 from slipping out.
- the O-ring 5 Before the emergency light lens 40 is pressed in, the O-ring 5 is located in the upper groove 51. It protrudes slightly beyond the lateral circumference of the upper end region of the emergency light lens 40, as can be seen in Figure 9c, and accordingly comes into contact with the aforementioned projection 35 when the emergency light lens 40 is attached to the cover 25. If the emergency light lens 40 is now pressed in the direction of the arrow (see Figures 9b and 9c), i.e. into the receptacle 30, the O-ring 5 rolls slightly along the first ramp 51 of the elevation 53, but already reaches the receiving area 30 of the opening 31.
- the O-ring 5 is made of a flexible material, it will compress slightly and can therefore overcome the dead center 55 as the emergency light lens 40 is further pressed into the opening 31, so that it rolls into the lower groove 52.
- the lens 40 is pressed into the receiving opening 31 until the lower flange-like projection 58 comes into contact with the lower edge of the projection 35, which then results in the arrangement of the O-ring 5 on the outer circumference of the emergency light lens 40 as shown in Figure 8 or in Figures 10b and 10c.
- the size and flexibility of the O-ring 5 are such that it cannot easily overcome the steeper lower ramp of the elevation 53 and thus the dead center 55, particularly due to the weight of the lens 40.
- the emergency light lens 40 is reliably and precisely positioned in the receptacle 30 of the cover 25, while at the same time, the receptacle opening 31 is extremely reliably sealed, preventing the ingress of dust and/or moisture or splash water.
- the emergency light lens 40 can obviously be inserted into the holder 30 in any desired rotational position. This means that depending on the mounting situation of the luminaire 100 and the course of an escape route to be illuminated, the emergency light lens 40 must be oriented in a suitable manner in order to specifically emit light in the direction of the escape route and to illuminate it.
- the aforementioned rotationally symmetrical design of the various components also offers the advantage that production can be carried out relatively easily within the scope of an injection molding process, since there are no undercuts or similar structures that would complicate demolding after injection molding.
- the flexibility of the O-ring should not only ensure the desired sealing of the receiving opening 31 of the cover 25 but also ensure that the mounted emergency light lens 40 permanently remains in the desired position and orientation. This means that the friction caused by the O-ring 5 is dimensioned such that a certain amount of force is required to rotate the emergency light lens 40. In particular, simply rotating it by grasping the collar 46 should not be possible.
- the previously mentioned slot-like indentations 48 provided on the outer circumference and a further indentation 49 provided in the area of the Fresnel structure 45 are responsible for this.
- These indentations 48 and 49 can be designed to allow the end portion of a suitable tool, e.g., a screwdriver, to be inserted into them and then, with the aid of this tool, to rotate the emergency light lens 40 or to pry it out of the receptacle 30 of the cover 25. This represents an additional safety measure that prevents the already fully assembled emergency light lens 40 from being accidentally or easily rotated out of the desired alignment at a later time.
- the inventive solution allows lenses – e.g., for targeted illumination of an escape route – to be easily mounted in a sealed manner on a corresponding housing of a luminaire or part of a luminaire housing and aligned as desired.
- the sealing achieved in this way represents a significant improvement over previously known solutions, ensuring that this area of the housing is also reliably protected against external influences.
- the inventive concept is, moreover, extremely versatile and is not limited to the rotatable arrangement of lenses for variable escape route lighting.
- lenses could also be arranged on a luminaire housing. These lenses do not serve to influence the light emitted by lamps, but whose function is to form an optical system for a sensor arranged within the luminaire housing.
- a sensor such as a camera sensor or a PIR sensor
- the lens which is sealed and detachably attached to the receiving opening in the manner described above, can then represent an optical system for the sensor, with the aid of which the area monitored by the sensor is defined.
- the preferably provided rotatable arrangement would be useful, for example, in the case of a motion or PIR sensor, to specifically define the area that is detected or monitored by the sensor by appropriately aligning the lens forming the optical system.
- the lens could also be designed to be rotationally symmetrical in order to completely detect an area located beneath the luminaire, i.e., across its entire circumference.
- a cover in particular an opaque cover
- a maintenance or configuration element can then be arranged within the housing in the area of the receiving opening, which can be accessed by removing the cover.
- Access to switches or other elements with which operating parameters of the luminaire can be set and/or stored e.g., a memory card or the like
- Positioning a communication module, such as an NFC antenna or a Bluetooth module, in the area of the cover according to the invention would also be conceivable.
- the housing 60 of the The luminaire 100 shown here which in turn is designed as an escape sign luminaire, also has a receiving area 30 which, analogous to the exemplary embodiment shown in Figures 1 - 10, has a receiving opening 31 with a surrounding wall area 32.
- this receiving opening 30 is closed by a cover 70, which in turn carries a circumferential seal in the form of an O-ring 5 on its circumference, wherein in particular the bearing area 50 of the cover 70 is identical to the bearing area 50 of the previously explained lenses 40.
- the contour of the bearing area 50 of the cover 70 is selected such that when the cover 70 is inserted into the receiving opening 31 of the luminaire housing 60, the O-ring 50 rolls and, in accordance with the process illustrated in Figures 9 and 10, a sealed attachment of the cover 70 to the housing 60 is achieved.
- the cover 70 is not intended to emit light, but rather to enable access to a functional part 75 located underneath, i.e., within the housing 60.
- a functional part 75 located underneath, i.e., within the housing 60.
- this can be, for example, a fuse or a battery, but also another component with the aid of which, for example, an operating parameter of the light 100 is set.
- this functional part 75 can be easily accessed if necessary, wherein, during the period in which access is not required, the housing 60 is reliably and tightly closed with the help of the cover 70.
- an opening or notch can be provided, analogous to the previously described lenses 40 of the previous exemplary embodiment, which facilitates the application of a tool for prying the cover 70 out of the position attached to the housing 60.
- the cover can be made of a beige material, in particular of an opaque material.
- FIG. 12 - 14 a third embodiment is shown in Figures 12 - 14, wherein here the luminaire 100 does not have a light guide element, but rather a vertically oriented, box-shaped housing 65, which in turn could be used, for example, to illuminate pictograms in order to display information, for example the direction of an escape route
- corresponding illuminants are arranged within the housing 65, wherein these illuminants are then preferably designed such that they emit light over a large area and evenly across the side walls of the housing 65, for example to backlight pictograms arranged there.
- each housing opening 67 has a corresponding receptacle 30, which is designed analogously to the two previous embodiments in Figures 1-11, whereby the cover 80 in this case also has the rotationally shaped bearing area 50, which is used for mounting the O-ring 5 according to the invention.
- the circular receptacle 30 extends from a square housing opening 67, as can be seen in Figure 12.
- the cover 80 now has a correspondingly shaped, square cover plate 82, from which the bearing area 50 then extends. This enables the square opening 67 to be closed with precise contours, as can be seen in the further Figures 12 and 13.
- the interaction between the receptacle 30, the bearing area 50, and the O-ring 5 is identical to the interaction in the previously discussed embodiments.
- the housing openings 67 and the associated covers 80 are designed to be different sizes.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102024102376.7A DE102024102376A1 (de) | 2024-01-29 | 2024-01-29 | Leuchte mit an einem gehäuse angeordneter linse |
| PCT/EP2025/051935 WO2025162862A1 (de) | 2024-01-29 | 2025-01-27 | Leuchte mit einer an einem gehäuse angeordneten linse oder abdeckung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4616116A1 true EP4616116A1 (de) | 2025-09-17 |
| EP4616116B1 EP4616116B1 (de) | 2026-01-14 |
Family
ID=94386427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP25701970.3A Active EP4616116B1 (de) | 2024-01-29 | 2025-01-27 | Leuchte mit einer an einem gehäuse angeordneten linse oder abdeckung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4616116B1 (de) |
| DE (1) | DE102024102376A1 (de) |
| WO (1) | WO2025162862A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7014341B2 (en) * | 2003-10-02 | 2006-03-21 | Acuity Brands, Inc. | Decorative luminaires |
| DE202010017453U1 (de) * | 2010-02-03 | 2011-11-08 | Schmitz Cargobull Ag | Leuchtmitteleinsatz und Leuchte für ein Nutzfahrzeug |
| DE102011082844A1 (de) * | 2011-09-16 | 2013-03-21 | Zumtobel Lighting Gmbh | Beleuchtungsanordnung insbesondere zur Rettungswegbeleuchtung |
| US8998443B1 (en) * | 2013-10-01 | 2015-04-07 | Spx Corporation | Beacon light having a lens |
| EP3473926B1 (de) * | 2017-10-23 | 2020-04-08 | Glashütte Limburg Leuchten GmbH + Co. KG | Leuchte und verfahren zur befestigung zweier bauteile |
| DE102021103957A1 (de) * | 2021-02-19 | 2022-08-25 | Zumtobel Lighting Gmbh | Rettungszeichenleuchte mit Rettungswegbeleuchtung |
-
2024
- 2024-01-29 DE DE102024102376.7A patent/DE102024102376A1/de active Pending
-
2025
- 2025-01-27 EP EP25701970.3A patent/EP4616116B1/de active Active
- 2025-01-27 WO PCT/EP2025/051935 patent/WO2025162862A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2025162862A1 (de) | 2025-08-07 |
| EP4616116B1 (de) | 2026-01-14 |
| DE102024102376A1 (de) | 2025-07-31 |
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