Recessed light

Abstract

In the case of a recessed luminaire (1) with a retaining collar (2) and with a threaded sleeve (3) and with a lamp holder (4) which has second retaining means (21) that interact with first retaining means (23) of the threaded sleeve (3) in such a way that the lamp holder (4) is held securely in the threaded sleeve (3) against separating forces during use, the invention proposes that the retaining means are designed as complementary first magnetic retaining means (23) and second magnetic retaining means (21).

Description

[0001] The invention relates to a recessed light fixture.

[0002] A recessed luminaire with the features of the preamble of claim 1 is known from practical experience. Spring-elastic retaining elements in the form of spring-loaded retaining claws serve to secure the lamp to the lamp holder, thus creating a single, easily handled assembly. Further spring-elastic retaining elements serve to clamp this assembly within the threaded sleeve and secure it against pull-out forces during use. When installed as a ceiling lamp, the pull-out forces are primarily determined by gravity and the assembly's own weight, and the clamping forces are adjusted accordingly. For maintenance purposes, the assembly can be pulled out of the threaded sleeve by applying a high tensile force that exceeds the pull-out forces occurring during normal use.Once the assembly has been pulled out of the threaded sleeve, the individual components of the assembly can also be separated from each other, since the retaining claws can be moved against their spring action, so that the lamp can be separated from the lamp holder.

[0003] The manufacturing of the known recessed luminaire is adversely affected by the fact that the individual retaining elements, designed as flat strips of spring steel, must be attached to the respective component of the recessed luminaire using additional fasteners such as screws, rivets, or the like. The installation of the recessed luminaire is further complicated by the fact that the spring-loaded retaining elements make handling the individual components more difficult, as they must first be guided while simultaneously holding and moving both components to be joined relative to each other. Finally, in practice, the problem can arise that the spring-loaded retaining elements are accidentally deformed, which either prevents or delays the installation of the recessed luminaire.

[0004] The recessed light fixture is typically installed at the point where it will be used. Components of the fixture, such as the mounting collar, are typically mounted on the back of a cover plate, which is not visible during use. This could be behind a wall panel or above a ceiling panel, while other components extend to the front of the cover plate, which is visible during use, or even protrude from it – for example, as a surrounding ring – partially covering the front of the cover plate. The threaded sleeve of the recessed light fixture can be screwed into the mounting collar, allowing for stepless adjustment of the distance between the light source and the collar, for example, to accommodate different panel thicknesses.

[0005] The invention is based on the objective of improving a generic recessed light fixture in such a way that it can be installed as simply as possible and therefore in the shortest possible time.

[0006] Features according to the invention are specified in claim 1. Embodiments are the subject of the dependent claims.

[0007] In other words, the invention proposes magnetically attaching the lamp holder to the threaded sleeve. The interacting magnetic retaining elements themselves require no complicated assembly, thus simplifying the manufacture of the recessed light. For example, retaining elements in the form of magnets can be glued to components of the recessed light. The other interacting retaining elements, in the form of a ferromagnetic element, can be provided cost-effectively by a steel component, for example, the same material from which another component of the recessed light is already made, such as sheet steel.For handling the individual components of the recessed luminaire before and during installation, the use of magnetic retaining elements means robust component design and straightforward handling, because the interacting retaining elements are activated simply by bringing the components to be joined closer together. For example, it is not necessary to first spread and hold retaining claws to allow the components to be brought closer together. This ensures the precise arrangement and alignment of the magnetically connected components in their installed state, and consequently, the visible light output of the recessed luminaire during use, e.g.The alignment of a light cone is advantageous because the interacting magnetic retaining elements can be factory-mounted on the components and are inherently immobile, so that the position of the magnetically connected components within the fully assembled recessed luminaire is already defined at the factory. This defined, reproducible type of light emission is particularly beneficial when several recessed luminaires are mounted in a group, as different angular positions of the lamp holders would otherwise be noticeable in such a group. During subsequent disassembly of the recessed luminaire, the magnetically connected components can be easily separated from one another by overcoming the magnetic holding forces.

[0008] In one embodiment, particularly easy handling of the individual components during the installation of the recessed luminaire is facilitated by the fact that the threaded sleeve with its first magnetic retaining elements and the lamp holder with its second magnetic retaining elements are designed to be connected to each other in a purely translational movement along the central axis of the recessed luminaire. After the threaded sleeve has been brought into the desired position on the retaining collar, the aforementioned assembly simply needs to be guided upwards and into the threaded sleeve until the magnetic holding forces take effect and the assembly is thus installed. Especially when the lamp holder and lamp can be fully inserted into the threaded sleeve, no external forces are to be expected on the lamp holder after the recessed luminaire has been installed that exceed the mere weight of the lamp holder and the lamp it holds.The matching of the magnetic holding forces to the weight of the lamp holder and the lamp therefore enables them to be held reliably and securely in the threaded sleeve.

[0009] As an alternative to the aforementioned configuration, the threaded sleeve, the lamp holder, and the magnetic retaining elements can be arranged so that, in a first translational, axial movement followed by a rotational movement around this axis, the lamp holder can be inserted into the threaded sleeve and the magnetic retaining elements can be connected. This allows for a positive locking mechanism similar to a bayonet fitting, in addition to the purely magnetic holding force, and ensures that the lamp holder is held particularly reliably in the threaded sleeve. This can be advantageous, for example, if the lamp holder itself or the lamp held by the lamp holder is not completely enclosed in the threaded sleeve but protrudes from it. This might be the case with a ceiling light, for instance, if the lamp is designed as a pendant lamp that hangs downwards from the lamp holder and the threaded sleeve.If, intentionally or unintentionally, impact or tensile forces act on the pendant lamp, it cannot be ruled out, depending on the intensity of the forces, that the magnetic holding forces will be exceeded and the lamp, along with its holder, will detach from the threaded sleeve. The positive locking mechanism ensures that the holder cannot unintentionally fall out of the threaded sleeve in such cases. The rotational movement occurs perpendicular to the direction in which the magnetic holding forces primarily act, allowing the lamp holder to be easily removed from the threaded sleeve by rotating it before being guided out of the sleeve axially.

[0010] In one embodiment, the retaining collar has a centering flange which serves to correctly align the retaining collar over a bore in the cover plate, so that the opening of the retaining collar is concentric with the bore. For this purpose, the centering flange runs around the opening of the retaining collar and extends in the direction of the light emission of the recessed light, and thus also in the direction of the second end of the threaded sleeve.

[0011] In one embodiment, the retaining collar has at least one recess outside the opening on the surface intended for contact with the cladding panel, i.e., on the surface facing the light emission of the recessed luminaire. The recess can, for example, be designed as a groove running concentrically around the opening and any centering collar; however, the recess can also be designed as a slot or a bore that passes through the retaining collar, or it can be designed as a dimple in the relevant surface of the retaining collar. For example, a plurality of dimples or several bores can be arranged in the retaining collar outside the opening. The at least one recess serves to facilitate the attachment of the retaining collar to a wall or ceiling cladding panel.For example, mechanical fasteners can be guided through the recesses if the recesses extend through the retaining collar. However, since the backs of the trim panels are often difficult to access during installation of the recessed light, the retaining collar may be secured with adhesive. In this case, at least one recess serves to collect any excess adhesive, preventing it from being forced into areas where it would interfere with further installation or subsequent work on the recessed light when the retaining collar is pressed against the trim panel.

[0012] One installation method involves screwing the threaded sleeve with its external thread into the internal thread of the mounting collar until, in use, the lower edge of the lamp holder is flush with the visible surface of the cover plate. To simplify this installation, one design features both ends of the lamp holder and the threaded sleeve lying in the same plane, i.e., aligned with each other. This refers to the open end of the lamp holder, which forms the light output of the recessed light, and the second end of the threaded sleeve, which is closer to the light output than the opposite, first end of the threaded sleeve. This alignment of the two ends allows the precise determination of the lamp holder's final position, particularly its light output, even before the lamp holder is mounted to complete the recessed light.

[0013] The first installation method described above typically requires rework in the form of filling and painting, as the saw cut in the cladding panel, created when drilling the hole, is not concealed, and a small gap typically remains between the threaded sleeve and the cladding panel. In a second installation method, both the gap is bridged and the saw cut is concealed, specifically when the threaded sleeve has a radially outward-facing cover collar at its other end. In this method, the threaded sleeve is screwed into the internal thread of the retaining collar until the cover collar makes contact with the cladding panel.

[0014] In one embodiment, the glare collar of such a threaded sleeve is covered by a glare ring. This embodiment assumes that the threaded sleeve is generally not visible during use. The lamp holder, on the other hand, is visible. Therefore, the threaded sleeve can either be made of an inexpensive material that meets the technical requirements placed on it, or it does not need to have a high-quality surface finish that meets specific optical requirements. The lamp holder, however, is visible and can be made of high-quality materials such as brass, bronze, or the like, or it can have a high-quality surface finish, for example, in the form of a paint finish, a gold or chrome plating, anodizing, or by mechanically processing the surface, such as grinding or polishing.The bezel can have the same surface finish as the lamp holder, so that the threaded sleeve can be provided as a standardized component at the lowest possible cost, and the optical adaptation to the lamp holder can be achieved by the bezel, which, as a significantly smaller component compared to the threaded sleeve, can therefore be machined economically to obtain the desired surface finish.

[0015] In one embodiment, the glare ring is integrated as part of the lamp holder. This ensures an absolutely identical surface finish on the visible surfaces of the lamp holder. In another embodiment, the glare ring is designed as a separate component, eliminating the need to manufacture and provide two different lamp holder variants to accommodate the two different installation options mentioned above. Instead, the same lamp holder can be flush with the visible surface of a cover plate, or, when using a threaded sleeve with a glare collar, it can be visually connected to the glare ring, which conceals the collar.In one embodiment, the attachment of the glare ring to the threaded sleeve is achieved without visible fasteners, is as simple as possible, and allows for easy removal of the glare ring. This is accomplished by holding the glare ring to the threaded sleeve without tools, particularly magnetically. The corresponding magnetically active elements of the threaded sleeve can be arranged on the cylindrical body of the threaded sleeve, especially at its second end, or on the glare collar of the threaded sleeve. The magnetic attachment ensures a reliable hold of the glare ring, unlike a clamping attachment, where temperature and aging influences could potentially compromise its secure hold.

[0016] In one embodiment, the lamp holder has two distinct sections. The first section, referred to as the holder, faces away from the light emission point of the recessed luminaire. This section is designed to accommodate a lamp. The second section, referred to as the reflector, extends from the first section to the light emission point of the recessed luminaire.

[0017] In one embodiment, the threaded sleeve has a base at its first end, the end furthest from the light emission, which in turn incorporates at least one of the first magnetic retaining elements. The arrangement of a magnetic retaining element in the base ensures perfect alignment of the lamp holder, so that when several recessed luminaires are mounted in a group, no angular deviations occur with regard to the orientation of the lamp holders, unless the lamp holders are intentionally designed, by means of corresponding joints or their shape, for a light emission that deviates from the axial orientation. The base of the sleeve typically runs transversely to the longitudinal or central axis of the threaded sleeve, so that axial alignment of the lamp holder can be easily ensured.In contrast to the described configuration, the magnetic effect of the interacting magnetic retaining elements could also act laterally, in a radial direction, between the lamp holder and the threaded sleeve. However, to facilitate insertion of the lamp holder into the threaded sleeve, a slight radial clearance between these two components is typically incorporated into the design. This clearance could lead to undesirable tilting of the lamp holder within the threaded sleeve if the retaining forces act in a radial direction.

[0018] Furthermore, the arrangement of the magnetic retaining elements in the sleeve base facilitates quick and easy installation of the recessed luminaire, because the lamp holder, including the lamp inside, simply needs to be inserted axially into the threaded sleeve until the sleeve base limits this movement. The interacting magnetic forces then automatically secure the lamp holder in the threaded sleeve. Particularly when the recessed luminaire has several magnetic retaining elements distributed around its circumference, a lamp holder that is accidentally held slightly askew by hand will automatically be brought into the desired axial alignment when the magnetic retaining elements of the threaded sleeve interact with those of the lamp holder. In one embodiment, the lamp holder therefore has a circumferential contact surface that forms the second set of magnetic retaining elements.This contact surface can, for example, be designed as a radially outward-projecting shoulder of the lamp holder, provided that the lamp holder is made of a ferromagnetic material.

[0019] In one embodiment, the aforementioned circumferential contact surface is designed as a ring made of a ferromagnetic material. This allows the lamp holder to be manufactured from various materials, particularly non-magnetic ones, such as plastics, fiber-reinforced composites, or non-ferrous metals. Depending on the manufacturing process of the lamp holder, the ring can, for example, be placed in a mold and encompassed by the base material of the lamp holder during casting, or it can be screwed to the lamp holder as a separate component.

[0020] In one embodiment, the ring is not a closed ring, but rather interrupted, so that, due to its ferromagnetic material, it is referred to as a spring ring, which allows for a certain degree of deformation. The lamp holder is provided with a circumferential groove, which is called a retaining groove, as it serves to accommodate the ferromagnetic ring. Due to its interruption, the ring can be deformed spring-elastically so that it can be clipped into the retaining groove and is held securely to the lamp holder solely by this positive fit, without any additional fasteners. The lamp holder and the ferromagnetic ring can later be easily separated, so that at the end of their service life they can either be reused together or separately, or recycled or disposed of in accordance with material specifications.

[0021] In one embodiment, the aforementioned sleeve base has a central opening, so that the sleeve base is designed as a radially inwardly projecting collar of the threaded sleeve. This allows for the economically advantageous design of the threaded sleeve with a comparatively short axial length, because the threaded sleeve does not need to be long enough to accommodate the entire lamp holder and lamp. Rather, the lamp, and possibly also a section of the lamp holder, can extend through the central opening when the lamp holder is inserted into the threaded sleeve together with the lamp.Aside from this economic advantage, there is also a technical benefit: the heat generated by the light source during use of the recessed light fixture can be dissipated more effectively on the back of the cover plate in a typically large cavity than if this heat were generated within the threaded sleeve, where it would accumulate. A lower operating temperature ensures the longest possible lifespan for the light source, which is both economically and ecologically advantageous.

[0022] In one embodiment, the aforementioned central opening widens radially outwards along at least one section of its circumference, such that the base of the sleeve is designed as a collar with single or multiple interruptions. In this context, the lamp and / or the lamp holder project radially outwards to such an extent that they pass through the widened central opening when moved axially through the threaded sleeve, for example, when the lamp holder, along with the lamp, is inserted into the threaded sleeve until the magnetic retaining elements engage and the lamp holder is thus secured in the threaded sleeve. Such an outwardly projecting element of the lamp holder can, for example, be a locking element that secures the lamp in the lamp holder, for instance, in the aforementioned section of the lamp holder referred to as the holder, in which the lamp is located.Such a locking element can, for example, be designed as a clamping screw that can be actuated by a tool or, preferably, tool-free in the form of a knurled screw. It extends radially through the wall of the holder and thus secures the lamp within the holder. Two or more locking elements can be arranged around the circumference of the holder, ensuring perfect axial alignment of the lamp within the holder and preventing axial displacement by the locking elements. Accordingly, the central opening in the sleeve base can have two or more enlargements to allow all locking elements to pass through easily when the lamp holder is inserted into the threaded sleeve.

[0023] In this previously described embodiment of the recessed luminaire, one configuration provides that the first and second magnetic retaining elements can only interact after the rotational movement has been completed. In this case, the lamp holder and / or the threaded sleeve have magnetic retaining elements that are limited to one or more specific sections of their circumference in the direction of rotation, so that they can only interact in certain angular positions that the lamp holder assumes relative to the threaded sleeve. This allows for visual verification that the lamp holder has been correctly inserted into the threaded sleeve: only the interaction of the first and second magnetic retaining elements causes the final axial movement of the lamp holder.If the lamp holder is initially inserted only a portion of its axial length into the threaded sleeve and then released, it will automatically fall back down because it is not magnetically held in the sleeve. Only after the rotational movement are the first and second magnetic retaining elements correctly aligned. For example, they may be opposite each other but not yet in contact. Therefore, after the rotational movement, the lamp holder may not yet be inserted deeply enough into the threaded sleeve, requiring it to be moved a further 1 to 2 mm axially until the two magnetic retaining elements are in contact and provide the desired magnetic holding force.If, during the installation of the recessed light, the lamp holder is only moved translationally over the first axial section and then rotationally according to the rotational movement, an axially incorrect position of the lamp holder by the aforementioned 1 to 2 mm is visually recognizable, so that the person installing it is reminded to also move the lamp holder axially over the second axial section and thus achieve the magnetic hold of the lamp holder in the threaded sleeve.

[0024] Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. The drawings show: Fig. 1 Individual components of the recessed light in disassembled and cutaway views, Fig. 2 two subassemblies of the recessed light prepared for installation, Fig. 3 the assembled recessed light, Fig. 4 a vertical section through an assembled recessed ceiling light oriented as a downlight, Fig. 5 a vertical section through a ceiling cladding panel and the elements of the recessed light from Fig. 4 during assembly, and Fig. 6 the situation of Fig. 5 in a subsequent assembly step, where two different ceiling cladding panels are indicated as examples.

[0025] Fig. Figure 1 shows components of a recessed luminaire 1 in an expanded view, with a lamp not shown, which has an LED light source including heat sink and an optical lens and which is commercially available as a standardized purchased component and is therefore comparable to a light bulb of classic recessed luminaires.

[0026] For illustrative purposes only, it is assumed that the recessed luminaire 1 is used as a ceiling recessed luminaire, so that directional terms such as "top" or "bottom" refer to an installation position in which the light emission of the recessed luminaire 1 is directed downwards. For other installation positions, the directional terms apply accordingly, mutatis mutandis.

[0027] The recessed light fixture 1 has a retaining collar 2, a threaded sleeve 3, and a lamp holder 4. In the illustrated embodiment, the retaining collar 2 is made of an aluminum alloy and extends around a circular opening 5, which is provided with an internal thread 6. The internal thread 6 is extended downwards by a centering collar 7, which extends downwards as a narrow ring. On its underside, the retaining collar 2 has several recesses 8, which serve to collect excess adhesive when the retaining collar 2 is glued to a surface, for example, a wall or ceiling panel. In the illustrated embodiment, the recesses 8 are designed as bores that completely penetrate the retaining collar 2.

[0028] In the illustrated embodiment, the threaded sleeve 3 is also made of an aluminum alloy and is essentially designed as a cylindrical tube section. However, it has a sleeve base 9 at its upper end, which in this embodiment is designed as a radially inwardly projecting collar that surrounds a central opening 10. The central opening 10 widens on two opposite circumferential sections to such an extent that the threaded sleeve 3 has no sleeve base 9 in these sections. The threaded sleeve 3 is provided externally with an external thread 11, which interacts with the internal thread 6 of the retaining collar 2. A circumferential end flange 12 runs below the external thread 11, extending radially further outward than the external thread 11.

[0029] The lamp holder 4 has an upper, cylindrical section, designated as the holder 13, to which a lower section, designated as the reflector 14, is attached, widening downwards. The holder 13 is designed to accommodate and secure a lamp, which has an LED chip as its light source, a heat sink, and an optical lens below the LED chip. The optical lens can be configured as a diverging or converging lens, or simply serve as protection for the LED chip without focusing or diverting the light beam. To securely fix the lamp in the holder 13, the holder 13 has two opposing threaded holes 15, allowing the lamp to be secured within the holder 13 using two clamping screws.

[0030] To the left of the perspective view of the lamp holder 4, the lamp holder 4 is shown in an axial section, with the transition from the bracket 13 to the reflector 14 magnified below the axial section. It can be seen that the bracket 13 is bounded downwards by a first step 16, which forms a stop for the lamp when it is inserted from above into the bracket 13 of the lamp holder 4. In this way, a defined position of the lamp within the lamp holder 4 is ensured. Below the first step 16, a second step extends radially inwards, which is designated as the extractor step 17.Between the first stage 16 and the extractor stage 17, when the lamp is inserted into the lamp holder 4, a ring-shaped circumferential groove is formed below the lens of the lamp, into which an extraction tool can engage in order to pull the lamp holder 4 together with the lamp downwards out of the recessed light 4, for example for maintenance purposes or to replace the lamp.

[0031] Fig. Figure 2 shows the recessed light 1 during its assembly: the threaded sleeve 3 has been screwed into the retaining collar 2 and forms a first assembly of the recessed light 1. A second assembly consists of a lamp 18, which has an electrical supply line 19 and is inserted into the holder 13 of the lamp holder 4 and fixed in the lamp holder 4 by means of two clamping screws 20. Furthermore, the lamp holder 4 has been provided with second magnetic retaining elements, which in the illustrated embodiment are designed as a ferromagnetic steel ring. The steel ring is not continuous all the way around, but is interrupted as a spring ring, so that it can be clipped spring-elastically into a retaining groove 22 of the lamp holder 4, which is particularly evident from the rag-like magnification in Figure 2. Fig. 1 is evident.

[0032] Fig. Figure 3 shows the recessed light 1 in its assembled state. The central opening 10 in the base 9 of the threaded sleeve 3 widens at two opposite points to the edge of the threaded sleeve 3, creating two spaces through which the clamping screws 15 can pass. In the illustrated embodiment, the clamping screws 15 are designed as knurled screws, which can be operated by hand and are therefore sensitive. When the aforementioned second assembly is inserted into the first assembly in a straight upward motion by lifting the lamp holder 4 into the threaded sleeve 3 and through its central opening 10, the clamping screws 15 pass through these spaces. The second magnetic retaining elements 21, in the form of the steel ring, interact with the first magnetic retaining elements, as explained below.

[0033] Fig. 4 shows the situation of Fig. 3 in an axial section. On its underside, the sleeve base 9 of the threaded sleeve 3 is provided with first magnetic retaining elements 23, which in the illustrated embodiment are designed as several circular flat magnets. The steel ring, which forms the second magnetic retaining elements 21 of the lamp holder 4, lies flat against the first magnetic retaining elements 23, the steel ring having a flat rectangular cross-section. The end collar 12 of the threaded sleeve 3 is located at the lower end of the threaded sleeve 3. Furthermore, Fig. 4, that the extractor stage 17 creates a circumferential groove below the lamp 18. If the extractor stage 17 is gripped from behind with, for example, two or more claws of an extraction tool, the lamp holder 4 can be pulled downwards and removed from the threaded sleeve 3 by overcoming the magnetic holding forces.

[0034] Fig. Figure 5 illustrates the installation of the recessed luminaire 1 using an example in which the recessed luminaire 4 is mounted as a downlight with downward-directed light emission on a cover plate 24. First, a circular hole is drilled in the cover plate 24 using a cup drill bit; the diameter of this hole corresponds to the outer diameter of the centering collar 7. Adhesive is then applied to the top surface of the cover plate 24 around the hole and / or to the underside of the retaining collar 2, and the retaining collar 2 is placed on the cover plate 24 in such a way that the centering collar 7 engages in the hole in the cover plate 24.

[0035] After the adhesive has cured or set, the threaded sleeve 3 is inserted from below into the bore of the cover plate 24 and screwed to the retaining collar 2, with the external thread 11 of the threaded sleeve 3 engaging with the internal thread 6 of the retaining collar 2. This screw connection allows stepless height adjustment of the threaded sleeve 3, with the lower edge of the threaded sleeve 3 being designed to be flush with the underside of the cover plate 24 in the illustrated embodiment. The connection of the threaded sleeve 3 to the retaining collar 2 creates an upper assembly of the recessed light 1.

[0036] The electrical supply line 19 of the lamp 18 is now connected to an electrical connection located above the cover plate 24. For easier access, this connection can be pulled downwards through the central opening 10 and out of the threaded sleeve 3. Alternatively, a connecting cable with a pre-installed plug connector, located above the cover plate 24, can be pulled downwards through the threaded sleeve 3 and plugged into the lamp 18, thus forming the electrical supply line 19.

[0037] The multiple magnets, which form the first magnetic holding means 23 in the sleeve base 9 of the threaded sleeve 3, are in Fig. 5 recognizable, whereby the cutting plane of the Fig. 5 through the two extensions of the central opening 10 in the sleeve base 9. Below the threaded sleeve 3 is in Fig. Figure 5 shows the pre-assembled lower assembly, which contains the lamp holder 4 and the lamp 18. This lower assembly is aligned axially with the threaded sleeve 3, for example, by inserting the upper end of the lamp 18 into the central opening 10 of the sleeve base 9 of the threaded sleeve 3. The lower assembly can then be moved upwards by a purely translational movement until the second magnetic retaining elements 21, in the form of the steel ring, contact the first magnetic retaining elements 23 of the threaded sleeve 3, thus securing the lower assembly within the upper assembly. A rotational movement may be necessary to align the two clamping screws 15 with the two extensions of the central opening 10, allowing them to pass through and the lower assembly to be raised sufficiently.

[0038] Fig. Figure 6 shows the completion of the upper assembly by screwing the threaded sleeve 3 into the retaining collar 2. This is purely an example, in contrast to the Fig. 5 two different cladding panels 24 shown: On the right is a cladding plate 24, the underside of which is flush with the lower edge of the threaded sleeve 3. The gap between the threaded sleeve 3 and the cladding plate 24 is almost completely bridged by the end collar 12. To create a seamless, flat surface, a permanently elastic, gap-filling compound can be poured into the gap. For this purpose, the end collar 12 has a chamfer on its lower edge, creating a sufficiently large, annular space around the threaded sleeve 3 that facilitates the injection of the compound.

[0039] The left is in Fig. Figure 6 shows a thinner cover plate 24, such that the lower edge of the threaded sleeve 3 is lower than the underside of the cover plate 24. This is meant to symbolically illustrate that the threaded sleeve 3 can extend downwards beyond the underside of a cover plate 24, regardless of the thickness of the cover plate 24. For example, even with the comparatively thicker cover plate 24 shown on the right, the threaded sleeve 3 could be screwed less deeply into the retaining collar 2, so that with this cover plate 24 as well, the lower edge of the threaded sleeve 3 is lower than the underside of the cover plate 24. This is shown on the left in Fig. Figure 6, a symbolic illustration of how the threaded sleeve 3 can be arranged in relation to the cladding plate 24, relates in particular to embodiments of the threaded sleeve 3 that differ from the illustrated embodiment. For example, the end collar 12 can be flatter and extend radially further outwards than in the illustrated embodiment, so that such an end collar 12 bridges the gap between the threaded sleeve 3 and the cladding plate 24.

[0040] After the lower assembly has been inserted into the upper assembly and raised until the first magnetic retaining elements 23 interact with the second magnetic retaining elements 21, the recessed luminaire 1 is fully assembled, as shown in Fig. 4 is shown.

[0041] The invention is not limited to one of the embodiments described above, but can be modified in many ways.

[0042] All features and advantages arising from the claims, the description and the drawing, including design details, spatial arrangements and process steps, can be essential to the invention both individually and in various combinations. Reference symbol list 1 recessed light 2 retaining collars 3 threaded sleeve 4 lamp holders 5 Opening 6 internal threads 7 Centering ring 8 Exclusion 9 shell bases 10 central opening 11 external threads 12 Final Bond 13 bracket 14 Reflector 15 threaded holes 16 first stage 17 Extractor stage 18 Lamp 19 Supply line 20 clamping screws 21 second magnetic holding devices 22 Holding groove 23 first magnetic holding devices 24 cladding panel

Claims

[1] Recessed light (1), • with a retaining collar (2), - which runs around an opening (5) provided with an internal thread (6), • and with a threaded sleeve (3), - which has a first end that is turned away from the light emission of the recessed luminaire (1), - which has a second end that is directed towards the light emission of the recessed luminaire (1), - and which has an external thread (11) that interacts with the internal thread (6) of the retaining collar (2), - and the first holding means (23) has, • and with a lamp holder (4), - which is designed to hold a lamp (18) having a light source, - and the second retaining means (21) interacts with the first retaining means (23) of the threaded sleeve (3) in such a way that the lamp holder (4) is held securely in the threaded sleeve (3) against separating forces during use, characterized by, that the holding means are designed as complementary first magnetic holding means (23) and second magnetic holding means (21). [2] Recessed light according to claim 1, characterized by , that the threaded sleeve (3), the lamp holder (4) and the first and second magnetic holding means (21, 23) are arranged so that in an exclusively axial direction of movement the lamp holder (4) can be inserted into the threaded sleeve (3) and the first and second magnetic holding means (21, 23) can be connected to each other. [3] Recessed light according to claim 1, characterized by , that the threaded sleeve (3), the lamp holder (4) and the first and second magnetic holding means (21, 23) are arranged so that, in a movement direction that is initially axial and then rotating about this axis, the lamp holder (4) can be inserted into the threaded sleeve (3) and the first and second magnetic holding means (21, 23) can be connected to each other. [4] Recessed light according to one of the preceding claims, characterized by , that the retaining collar (2) has a centering collar (7), wherein the centering collar (7) runs around the opening (5) of the retaining collar (2) and extends towards the second end of the threaded sleeve (3). [5] Recessed light according to one of the preceding claims, characterized by , that the retaining collar (2) has at least one recess (8) radially outside the opening (5) on its surface facing the light emission of the recessed luminaire (1). [6] Recessed light according to one of the preceding claims, characterized by , that the end of the lamp holder (4) forming the light emission is flush with the second end of the threaded sleeve (3). [7] Recessed light according to one of the preceding claims, characterized by , that the threaded sleeve (3) has a radially outward extending baffle collar at its second end. [8] Recessed light according to claim 7, characterized by a glare ring that covers the upper side of the glare collar facing away from the first end. [9] Recessed light according to claim 8, characterized by , that the aperture ring is held on the threaded sleeve (3) without tools, in particular magnetically. [10] Recessed light according to one of the preceding claims, characterized by , that the lamp holder (4) has a first section, designated as holder (13), which is directed away from the light emission of the recessed luminaire (1) and is designed to accommodate a lamp (18), and has a second section, referred to as the reflector (14), which extends to the light emission point of the recessed luminaire (1). [11] Recessed light according to one of the preceding claims, characterized by, that the threaded sleeve (3) has a sleeve base (9) at its first end, and that the sleeve base (9) has at least one of the first magnetic retaining means (23). [12] Recessed light according to claim 11, characterized by , that the lamp holder (4) has a circumferential contact surface which forms the second magnetic holding means (21). [13] Recessed light according to claim 12, characterized by that the contact surface is designed as a ring made of a ferromagnetic material. [14] Recessed light according to claim 13, characterized by , that the ring is designed as a spring ring and is held in a circumferential retaining groove (22) of the lamp holder (4). [15] Recessed light according to one of claims 11 to 14, characterized by , that the sleeve base (9) has a central opening (10) such that it is designed as a radially inwardly projecting collar of the threaded sleeve (3). [16] Recessed light according to claim 15, characterized by , that the central opening (10) of the sleeve base (9) widens radially outwards on at least one circumferential section in such a way that the sleeve base (9) is designed as a single or multiple interrupted collar, and that the lamp (18) and / or the lamp holder (4) extends radially outwards to such an extent that, during an axial movement through the threaded sleeve (3), it passes through the widening of the central opening (10). [17] Recessed light according to claims 2 and 16, characterized by , that the first and second magnetic retaining means (21, 23) are designed in such a way that • the rotational movement is made possible after the lamp (18) and / or the lamp holder (4) have passed through the widening of the central opening (10), • and only after the rotational movement has been carried out do the first and second magnetic holding means (21, 23) interact.

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