Lighting unit for reliably securing attachments
The luminaire's bayonet connection with integrated locking sections ensures secure attachment and easy assembly, addressing detachment issues and reducing assembly time and costs.
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Patents
- Current Assignee / Owner
- ZUMTOBEL LIGHTING GMBH
- Filing Date
- 2022-03-22
- Publication Date
- 2026-07-08
AI Technical Summary
Existing luminaires face issues with attachments detaching during operation, especially when lenses with rotating parts are adjusted, and additional fasteners increase assembly time and costs.
A luminaire design featuring a bayonet connection with integrated locking sections that allow for secure coupling and easy assembly, using a rotational movement to attach a light transmission element to the luminaire body, preventing unintentional detachment.
The design provides a simple, secure, and intuitive assembly process that prevents unintentional loosening of the luminaire components, while allowing easy replacement of the light transmission element.
Smart Images
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Abstract
Description
[0001] The present invention relates to a luminaire with a luminaire body and a light transmission element that can optionally be attached to it, through which light from a light source received in the luminaire body can pass.
[0002] Luminaires of the aforementioned type are generally known (see, for example, CN 208 475 105 U and US 2013 / 250586 A1). These luminaires can be optionally fitted with attachments for optically guiding the light. These attachments are, for example, screwed onto the luminaire body or fastened using fasteners such as screws. With a screw-on attachment, there is often a risk that it will detach from the luminaire during operation. This risk is increased if the attachment is a lens that itself has rotating parts for adjusting or varying a defined light output, as manipulation of these parts can also affect the connection between the lens and the luminaire body. Screw-on versions are known in which an integrated design prevents detachment.However, this locking mechanism can be bypassed if the light is tilted (for example, when used as a spotlight) or if the light is manually adjusted, causing the attachment to detach from the light fixture. In the case of a lens attachment, manual adjustment could include rotating the parts to adjust the light output. Using additional fasteners increases assembly time and component costs.
[0003] DE 100 13 087 A1, US 2009 / 213595 A1 and DE 20 2008 004448 U1 each show a luminaire according to the preamble of claim 1.
[0004] It is therefore an object of the present invention to provide a luminaire of the type mentioned above which enables a simple and safe coupling of a luminaire transmission element to a luminaire body.
[0005] This problem is solved by the subject matter of the independent claim. The dependent claims further develop the central idea of the present invention in a particularly advantageous manner.
[0006] The invention relates to a luminaire comprising a luminaire body for receiving a light source. The luminaire body, in turn, has a light emission opening for the emission of light from the received light source, preferably in a light emission direction. The luminaire further comprises a light transmission element, which can optionally be mechanically coupled to the luminaire body in such a way that the light from the received light source, exiting through the light emission opening, passes through the light transmission element to emit light from the luminaire.The luminaire body has a first coupling section and the light-transmitting element has a second coupling section, which interact in such a way that the light-transmitting element can be moved by means of a rotational movement about an axis of rotation relative to the luminaire body between a mounting position in which the luminaire body and the light-transmitting element are separable and a coupling position in which the luminaire body and the light-transmitting element are mechanically coupled to each other. The luminaire body has a first locking section and the light-transmitting element has a second locking section, which can be locked together in a snap-fit connection in the coupling position in such a way that relative rotation between the luminaire body and the light-transmitting element about the axis of rotation is prevented.
[0007] The luminaire according to the invention can thus be assembled by means of a rotary motion, and in particular by means of a screw motion, in order to mechanically couple the luminaire body and the light transmission element, which can optionally be attached to it. Furthermore, locking sections are integrated into the two elements to be coupled, which engage in a locking connection in the coupled position in order to prevent the two components from coming loose by rotation around the axis of rotation. This provides a simple and integrated solution not only for easy assembly of the luminaire, but also for easily securing the assembled parts against each other and thus preventing unintentional loosening.
[0008] The axis of rotation can preferably extend along the direction of light emission. This allows for a particularly simple design and intuitive assembly.
[0009] The coupling sections preferably form a bayonet connection. In principle, a different type of screw connection is also conceivable. Generally, such screw connections offer a particularly simple and intuitive coupling option. Furthermore, a bayonet connection provides a simple structure with intuitive coupling capabilities.
[0010] One of the coupling sections can have a receiving groove that extends at least partially around the axis of rotation, and the other coupling section can have a coupling projection that is movable within the receiving groove during rotation. This could be, for example, the screw connection or bayonet connection described above, or another similar connection. This type of connection is particularly simple in its construction.
[0011] The luminaire can have several first and second coupling sections, preferably evenly distributed around the axis of rotation. This increases the reliability of the coupling connection and simplifies assembly. Furthermore, an evenly distributed arrangement around the axis of rotation ensures secure and tilt-free mounting and connection.
[0012] The snap-fit connection is preferably detachable. This makes it easy to remove the light-transmitting element after it has been installed and, if necessary, replace it with a different light-transmitting element. This further increases the overall flexibility of the luminaire.
[0013] One of the locking sections can have a locking projection and the other a locking recess. These are preferably designed such that the locking projection engages with the locking recess in the coupling position to form the locking connection. This provides a simple design for the locking connection.
[0014] The detent projection preferably extends radially with respect to the axis of rotation and further preferably projects towards the axis of rotation. The detent recess, in turn, preferably extends radially with respect to the axis of rotation and further preferably projects outwards towards the axis of rotation. This allows for a simple design and easy locking of the detent sections during the relative rotational movement between the luminaire body and the light transmission element.
[0015] The detent retraction is preferably limited on both sides, at least in the direction of rotation, by detent wall sections. This ensures a secure and defined detent connection in the coupling position. Furthermore, the detent sections can be securely held in the coupling position with respect to rotation.
[0016] At least the section of the locking wall facing the mounting position can have a ramped section extending along its entire circumference to guide the locking projection towards the locking projection when rotating from the mounting position to the coupling position. Achieving the locking connection can thus be simplified and preferably occurs automatically in a simple manner when applying the corresponding relative rotational movement between the luminaire body and the light transmission element.
[0017] The detent wall section facing away from the mounting position can project radially higher than the other detent wall section with respect to the detent retraction. This ensures that, upon reaching the coupling position, the detent sections engage securely and cannot rotate beyond the coupling position, as the higher detent wall section acts as a stop for the detent projection in the direction of rotation.
[0018] At least one of the detent sections can be pre-tensioned, preferably radially with respect to the axis of rotation, in the direction of the other detent section in the coupling position or in the direction of the detent connection, in order to force it into the detent connection in the coupling position. In this way, the engagement of the detent connection in the coupling position between the two aforementioned detent sections can be ensured particularly easily.
[0019] The detent sections are preferably designed such that the at least one pre-tensioned detent section, when rotated from the mounting position to the coupling position, is deflected against the pre-tension, preferably radially with respect to the axis of rotation, in order to press into the detent connection in the coupling position against the deflection. The deflection is preferably effected by guidance via the ramp section. The deflection described above increases the spring force on the pre-tensioned detent section until it reaches the coupling position, thus ensuring a particularly simple locking action of the detent sections in the coupling position.
[0020] The pre-tensioned detent section can incorporate a spring element to apply the appropriate pre-tension. This spring element can be a simple spring. It can also be an elastically deformable body, such as a rubber element. Alternatively, the spring element can be a spring-loaded pressure piece containing a ball that is partially exposed through an opening in the housing. The housing also contains a spring that pre-tensions the ball towards the opening. The ball can move away from the opening into the interior of the housing against the spring force. Using a spring element provides a simple way to achieve the necessary pre-tension for the detent section.
[0021] The pre-tensioned locking section can be moved into a release position, preferably radially with respect to the axis of rotation, contrary to the pre-tension, in order to allow relative rotation between the luminaire body and the light-transmitting element even in the coupled position; preferably at least towards the mounting position. Thus, for example, the locking connection can be easily released as needed, and the light-transmitting element can be detached from the luminaire body by rotating it around the axis of rotation in the opposite direction to a mounting direction.
[0022] The pre-tensioned locking section can have a release section by which an operator can move the pre-tensioned locking section into the release position. This release section can, for example, be a release projection. Thus, the locking section can be easily moved into the release position. Preferably, the release section can be provided or project outwards through an opening in the part containing the pre-tensioned locking section, between the luminaire body and the light transmission element, and particularly preferably, it can be flush with the part, at least in the coupling position. This makes the release section easily accessible. In particular, if the release section is flush, unintentional release of the release section, and thus movement of the pre-tensioned locking section into the release position, can be avoided.Furthermore, flush integration of the release section can be advantageous for aesthetic reasons.
[0023] The luminaire body and / or the light-transmitting element, as a mounting component, each have a locking element with one of the locking sections, preferably the pre-tensioned locking section, and a mounting section for detachable attachment to the mounting component. In this way, the corresponding locking section can be provided independently. Furthermore, if required, materials advantageous for the locking connection can be selected, which may, for example, differ from the other materials of the mounting component containing the locking element. Thus, an overall optimized luminaire can be provided.
[0024] The locking element is pivotally mounted to the mounting bracket via the mounting section. This allows for easy adjustment of the locking element's position. Furthermore, it simplifies the installation of the locking element.
[0025] The locking element can be attached to the mounting part via the mounting section in such a way that the locking element is movable between an installation position, in which the locking element can be removed from the mounting part, and an operating position, in which the locking element holds the locking section in the position to form the locking connection. Between these two positions, the locking element can preferably be pivoted by a defined angle α, where this angle α is, for example, 90°. Thus, the locking element can be easily mounted while simultaneously being securely fixed in the operating position. This prevents the locking element from unintentionally coming loose, particularly during the assembly of the components.
[0026] The locking element can preferably be attached to the mounting part via the mounting section in such a way that the locking section can be moved to the release position at will. This allows the release position to be reached easily and with a simple luminaire design.
[0027] The mounting section and the locking section can be connected via a connecting section. The locking element is therefore simple in design and easy to manufacture. For example, the locking element can preferably be supplied as an aluminum die-cast or injection-molded part.
[0028] The mounting section can have, viewed in the direction of rotation, projecting bearing projections on both sides opposite the connecting section. These projections engage in bearing receptacles of the fastening part, which are opposite each other in the direction of rotation, for pivoting the locking element, preferably about a pivot axis. In this way, a simple movable and, preferably, pivotable mounting of the locking element can be provided, which also enables secure movement or pivoting of the locking element.
[0029] The distance between the bearing receptacles is preferably greater than the combined length of one of the bearing projections and the width of the connecting section, viewed in the direction of rotation or in the axial direction of the pivot axis. This makes it easy to mount the locking element by first inserting one of its bearing projections into one of the bearing receptacles. For this purpose, the locking element is, for example, slightly tilted. The locking element can then be tilted straight so that the other bearing projection aligns with the opposite bearing receptacle. By simply sliding the locking element laterally towards the opposite bearing receptacle, the other bearing projection can also be inserted into the corresponding bearing receptacle, thus ensuring a secure and firm – in this case, pivotable – mounting of the locking element on the corresponding fastening component.
[0030] The fastening element preferably has a retaining section which, in the position for forming the locking connection, preferably in the operating position, limits the locking element and preferably its connecting section on both sides in the direction of rotation such that the locking element remains fixed in the fastening element by means of the mounting section (and thus is not laterally displaceable along the pivot axis) and, in this state, the associated locking section is preferably also movable into the release position. The retaining section can preferably be formed by retaining wall sections of the fastening element that are opposite each other in the direction of rotation. The locking element is thus securely held on the fastening element, particularly during operation.Particularly when the design or mounting uses the aforementioned bearing projections and recesses, lateral displacement of the locking element along the bearing projections or pivot axis is prevented in the operating position, thus avoiding unintentional release of the locking element from its mounting position relative to the mounting part. This allows the locking element to be easily secured in the operating position and prevents it from falling off the mounting part.
[0031] The luminaire can further comprise spring elements which are arranged axially with respect to the axis of rotation between the luminaire body on the one hand and the light-transmitting element on the other. Preferably, these spring elements can be distributed around the axis of rotation and, even more preferably, evenly distributed. The purpose of this arrangement of spring elements is to axially clamp the luminaire body and the light-transmitting element, or at least their coupling sections, at least in the coupling position (with respect to the axis of rotation). This is intended to provide a secure, stable, and preferably backlash-free connection, particularly in the area of the mechanical coupling between the luminaire body and the light-transmitting element, which further improves the connection between these two components.
[0032] Preferably, the luminaire further comprises a light source, preferably an LED (light-emitting device), which is accommodated in the luminaire body in such a way that light from the light source passes through the light emission aperture and, if the light transmission element is mechanically coupled to the luminaire body, also through the light transmission element to emit light from the luminaire. In particular, the use of LEDs as light sources enables a cost-effective solution for providing light sources with a particularly long service life.
[0033] The light transmission element can be, for example, a ring, such as a decorative ring. Alternatively, the light transmission element could be any type of optical attachment, such as a lens or objective. The optical attachment can, in turn, include an optical element, such as a lens or diffuser, and the like, as well as combinations thereof. The optical element is particularly preferably designed to be displaceable or relocatable along the direction of light emission or axially along the axis of rotation. The optical attachment can have at least two housing parts rotatable relative to each other in order to selectively change the distance between the optical element and the luminaire body along the direction of light emission or axially along the axis of rotation, with one of the housing parts having the second coupling section and the second locking section, and preferably the other housing part carrying the optical element.This allows for easy adjustment or control of the light output of the light source. Furthermore, the aforementioned snap-fit connection ensures that even with optical attachment housing components that can rotate relative to each other, the mechanical coupling between the luminaire body and the light transmission element (provided here by a screw connection) remains stable and prevents loosening, even when the optical attachment is rotated to adjust the optical light output. The housing components of the light transmission element (such as the aforementioned ring or housing parts) can be manufactured, for example, by injection molding or aluminum die casting.
[0034] Further embodiments and advantages of the present invention are described below with reference to the figures in the accompanying drawings. These show: Fig. 1 a perspective view of a lamp according to a first embodiment of the present invention, Fig. 2 a perspective view of the lamp according to the invention. Fig. 1 with two further light transmission elements in a disassembled arrangement, Fig. 3 a perspective detail view of the luminaire body of the luminaire according to the invention. Fig. 2 Fig. 4 shows a side detail sectional view of a mechanical coupling area between the luminaire body and the light transmission element of the luminaire according to the invention. Fig. 1 with locking element in operating position, Fig. 5 the side detail sectional view according to Fig. 4 with locking element in release position, Fig. 6 a perspective detail view of the locking element of the luminaire according to the invention Fig. 4 , Fig. 7 a perspective view of a part of the luminaire body of the luminaire according to the invention, having the first coupling section Fig. 1 as well as a locking element according to Fig. 6 Before the installation of the latter, in exploded view, Fig. 8, the perspective view according to Fig. 7 with the locking element in installation position, and Fig. 9 the perspective view according to Fig. 8 with the locking element in operating position.
[0035] The figures show an embodiment of a lamp 1 according to the present invention. Fig. 2 This represents different components for forming alternative embodiments of the luminaire 1 according to the invention.
[0036] The luminaire 1 has a luminaire body 2 for receiving a light source (not shown in detail here). The light source can preferably be an LED or another type of light source.
[0037] The luminaire body 2 has a light emission opening 23 for the emission of light from the incorporated light source in a light emission direction A.
[0038] The luminaire body 2 is shown here as an example with a cylindrical housing 20. However, other housing shapes are also conceivable. As shown, the luminaire body 2 can have a rigid, tubular support 21, which preferably allows the luminaire body 2 to be rotatably and pivotably mounted in order to change the direction of light emission A. The supporting parts or housing elements of the luminaire body 2, i.e., for example, the housing 20 or the support 21, can be manufactured, for example, as injection-molded parts, sheet metal parts, die-cast aluminum parts, and the like. At the end of this support 21 facing away from the luminaire body 2, the luminaire body 2 preferably has a connection element 22. The luminaire body 2 can preferably be electrically and / or mechanically connected at the installation site via this connection element 22.In the illustrated embodiment, the connection element 22 for electrical and mechanical coupling is, for example, integrated into an elongated mounting rail. However, the luminaire 1, or its luminaire body 2, can also be designed differently and, for example, be configured as a recessed luminaire, surface-mounted luminaire, or pendant luminaire.
[0039] In addition to the luminaire body 2, the luminaire 1 also has a light transmission element 3, which can optionally be mechanically coupled to the luminaire body 2 in such a way that the light exiting the light source through the light exit opening 23 passes through the light transmission element 3 to emit light from the luminaire 1. Fig. 1 The luminaire 1 is shown with the luminaire body 2 and the light transmission element 3 mechanically coupled to it. Fig. 2Figure 3 shows three possible variants of a light transmission element 3 in its detached state from the luminaire body 2. In principle, all possible types of light transmission elements 3 or attachments for a luminaire body 2 are conceivable for forming a corresponding luminaire 1. For example, in a simple design variant, the light transmission element 3 can be formed as a ring, such as a decorative ring. Alternatively, it is also conceivable that the light transmission element 3 could be designed according to the variants shown. Fig. 2 as an optical attachment, such as a lens or objective. The optical attachment can preferably include an optical element 30, such as a lens or a diffuser. The optical element 30 can be fixedly provided in the light transmission element 3, as shown in the variant at the top left. Fig. 2shows. It is also conceivable that the optical element 30 is displaceable along the light emission direction A (i.e., when the light transmission element 3 is mechanically coupled to the luminaire body 2) or axially along the axis of rotation D (cf. Fig. 2 ; lower variant) or movable (cf. Fig. 2(variant shown above center). In a particularly preferred embodiment, especially in the movable variant, the optical attachment can, for example, have at least two housing parts that are rotatable relative to each other. These are coupled to each other, for example, such that relative rotation of the housing parts relative to each other causes them to be axially displaced. It is also conceivable that the optical element is suspended in the housing parts such that it is axially displaced by relative rotation of the housing parts relative to each other. Thus, the distance of the optical element 30 to the luminaire body 2 can be selectively changed along the light emission direction A or axially along the axis of rotation D.
[0040] The light source is received in the luminaire body 2 in such a way that its light passes through the light emission opening 23 and, if the light transmission element 3 is mechanically coupled to the luminaire body 2, also through the light transmission element 3 to emit light from the luminaire 1. An optical element, such as a lens, can preferably be arranged in the light emission opening 23 to direct the light from the light source in the desired direction; preferably, to direct it into and through the light transmission element 3 to emit light from the luminaire 1. A light mixing chamber can extend between the light emission opening 23 or the lens arranged therein and the light source – particularly when LEDs are used as light sources – to homogeneously mix the light emitted by the light source.
[0041] The luminaire body 2 has a first coupling section 4 and the light transmission element 3 has a second coupling section 5. These coupling sections 4 and 5 interact in such a way that the light transmission element 3 can be moved by means of a rotational movement about the axis of rotation D relative to the luminaire body 2 between a mounting position in which the luminaire body 2 and the light transmission element 3 can be separated from each other, and a coupling position (see Figure 2). Figure 1 and 4 ), in which the luminaire body 2 and the light transmission element 3 are mechanically coupled to each other, is movable.
[0042] The axis of rotation D preferably extends along the direction of light emission A, as is the case, for example, in Fig. 1 as indicated. For example, in the Figures 2 and 3As can be seen, coupling sections 4 and 5 can together form a bayonet connection. One of the coupling sections (here the first coupling section 4) can have a receiving groove 40 that extends at least partially around the axis of rotation D, as shown in the detailed illustration in Fig. 3 This can be seen from the following. The receiving groove 40 forms, as an example, part of the aforementioned bayonet connection. In principle, the receiving groove 40 could also be a different type of thread, for example, in a conventional form. The other coupling section (here the second coupling section 5) can have a coupling projection (not shown) that is guided in the receiving groove 40 by the rotational movement. This coupling projection could, for example, be a pin-like protruding element, a mating thread, or something similar.
[0043] In a preferred embodiment, the luminaire 1 can have several first and second coupling sections 4, 5, which are preferably evenly distributed around the axis of rotation D. In the illustrated embodiment, for example, three such pairs of coupling sections are provided.
[0044] The luminaire 1 can further comprise spring elements (not shown) which are arranged axially with respect to the axis of rotation D between the luminaire body 2 and the light-transmitting element 3 and preferably distributed (preferably uniformly distributed) around the axis of rotation D. These spring elements are intended to axially clamp the luminaire body 2 and the light-transmitting element 3 and at least their coupling sections 4, 5, at least in the coupling position. In the illustrated embodiment, for example, in Figure 3Three recesses 24 are clearly visible around the circumference of the luminaire body 2, one of which is also located in the Figures 4 and 5 This can be seen in the side view. The corresponding spring element can be inserted into these recesses 24. This element can be, for example, made of an elastic material, such as a rubber stopper, or a spring-loaded pressure piece. This spring element then protrudes outwards from the recess 24 with a spring end and, in its installed position, points towards the light transmission element 3. By mechanically coupling the light transmission element 3 with the luminaire body 2, these move axially relative to each other and press the spring element between them, so that these components are tensioned against each other, thereby compensating for or eliminating any play between the coupling sections 4 and 5.
[0045] The luminaire body 2 further has a first locking section 6 and the light transmission element 3 a second locking section 7, which in the coupling position are connected in a locking connection (cf. Fig. 4 ) are lockable together, so that relative rotation between the luminaire body 2 and the light transmission element 3 around the axis of rotation D is prevented. The locking connection is preferably detachable.
[0046] How especially the Figures 4 and 5 As can be seen, one of the locking sections (here the second locking section 7) can have a locking projection 70 and the other of the locking sections (here the first locking section 6) a locking recess 60. These are designed such that the locking projection 70 engages in the locking recess 60 in the coupling position to form the locking connection.
[0047] As in particular the Fig. 4As can be seen, the detent projection 70 preferably extends radially with respect to the axis of rotation D and preferably projects towards the axis of rotation D. As furthermore, also in Fig. 4 combined with Fig. 9 As can be clearly seen, the detent recess 60 can extend radially with respect to the axis of rotation D and preferably towards the axis of rotation D. Thus, the two detent sections 6, 7 are preferably designed to be complementary in order to form a secure detent connection when the two detent sections 6, 7 are coupled.
[0048] The detent retraction 60 is preferably limited on both sides, at least in the direction R of the rotational movement, by detent wall sections 61, 62. This ensures a secure detent with the detent projection 70 while maintaining the detent connection.
[0049] At least the locking wall section 61 facing the mounting position preferably has a circumferentially extending ramp section 63 that extends outwards, i.e., radially away from the axis of rotation D. This ramp section 63 enables the locking projection 70 to be guided towards the locking recess 60 when rotating from the mounting position to the coupling position.
[0050] The locking wall section 62 facing away from the mounting position preferably projects radially higher with respect to the locking recess 60 relative to the axis of rotation D (in this case, therefore outwards with respect to the axis of rotation D, as for example in Fig. 9 (can be seen) as the other locking wall section 61. The higher projecting locking wall section 62 thus forms a stop for the locking projection 60, viewed in the direction of rotation towards the coupling position, when the locking sections 6, 7 are moved from the mounting position to the coupling position.
[0051] At least one of the detent sections (here the first detent section 6) is preferably pre-tensioned in the direction of the other detent section (here the second detent section 7) in the coupling position or in the direction of the detent connection. This is preferably radial with respect to the axis of rotation D. This pre-tensioning is intended to ensure that the at least one pre-tensioned detent section 6 presses into the detent connection in the coupling position, so that the detent connection can be reliably formed and maintained.
[0052] The detent sections 6, 7 are preferably designed such that the at least one pre-tensioned detent section (in this case, the first detent section 6) is deflected against the pre-tension when rotated from the mounting position to the coupling position. This is exemplified in the Fig. 5The direction of the deflection is indicated by arrow K, and arrow V indicates the direction of the preload force acting on the detent section 6. The deflection is preferably generated by guidance over the ramp section 63, whereby the detent projection 70, during rotational movement, is guided by the luminaire body 2 relative to the light transmission element 3 and is supported on the ramp section 63.
[0053] The pre-tensioned detent section 6 preferably has a spring element 8 to pre-tension this detent section 6 accordingly. This is clearly evident, for example, from the Figures 4, 5 and 8 to be seen. The spring element 8 is shown, for example, as a spring-loaded pressure piece. As such, the spring element 8 has a sleeve-shaped housing 80 in which a ball 81 extends partially outwards through an opening 82 of the housing 80 (in Figures 4 and 5(projects downwards) and is pre-tensioned towards the opening 82 by means of a spring 83 supported in the housing 80. The spring element 8, designed as a resilient pressure piece, is, as the Figures 4 and 5 As can be seen, the sleeve-shaped housing 80 is inserted here in the area of the locking section 6 or in a locking element 9 described below and is supported accordingly on a support section 25 of the luminaire body 2. To illustrate the spring force of the spring 83, the sphere 81 is shown in Fig. 5 The ball 81, which actually bears against the support section 25, is shown to overlap. By the amount of the overlap, the ball 81, which is actually supported against the support section 25, would compress the spring 83 and thus increase the preload force in the direction V.
[0054] In principle, the spring element 8 can also be provided in a different way. For example, a simple spring can be provided, or the spring element 8 can be made of an elastic material, such as a rubber block.
[0055] The pre-tensioned resting section 6 can, as is particularly evident from the combination of the Figures 4 and 5 It can be seen that, contrary to the preload, it moves into a release position (cf. Fig. 5 ) and preferably radially with respect to the axis of rotation D, be movable in order to allow relative rotation between the luminaire body 2 and the light transmission element 3 even in the coupling position (cf. Fig. 5 ) to allow; preferably at least towards the mounting position. This mobility into the Fig. 5In the shown release position, the locking connection can be easily released in order to separate the luminaire body 2 and the light transmission element 3 from each other by a corresponding relative rotational movement towards the mounting position, as is then shown in the Fig. 2 This is shown as an example. In this way, the light transmission element 3 can optionally be removed from the luminaire body 2, for example for maintenance or to replace it with another light transmission element 3.
[0056] The pre-tensioned detent section 6 may preferably have a release section 64, by means of which an operator moves the pre-tensioned detent section 6 into the release position (cf. Fig. 5 ) can move. In solution section 64, it can be, as in particular the Figures 4 to 6As can be seen, for example, this is a release projection. In a particularly preferred embodiment, this release section 64 can preferably provide sufficient space to accommodate the spring element 8 in a recess 65 provided therein, as is the case, for example, with the Figures 4, 5 and 7 can be seen from this.
[0057] The release section 64 can preferably project outwards through an opening 26 in the part (here, the lamp body 2) having the pre-tensioned locking section 6. Preferably, the release section 64 is flush with the said part (here, the lamp body 2) at least in the coupling position, as is particularly evident from the Figures 3 and 4 This is clearly evident.
[0058] The luminaire body 2, or the light transmission element 3, has – then as a fastening part – the previously mentioned locking element 9. This is as such in the Fig. 6 and also in the Figures 4, 5 and 7 to 9 clearly visible. The locking element 9 has one of the locking sections (here preferably the pre-tensioned locking section or the first locking section 6). In addition, the locking element 9 also has a mounting section 90 by means of which the locking element 9 is attached to the mounting part (here the luminaire body 2); preferably detachably. The locking element 9 is pivotably mounted on the mounting part 2 by means of the mounting section 90, as can be seen, for example, from a view of the Figure 8 and 9 This is evident. The locking element 9 preferably pivots about a pivot axis S of the mounting section 90.
[0059] The locking element 9 is preferably attached to the fastening part 2 via the mounting section 90 in such a way that the locking element 9 is positioned between an installation position (cf. Fig. 8 ), in which the locking element 9 can be removed from the fastening part 2 (see overview of the Figures 7 and 8 ), and an operational position (see Fig. 9 ) in which the locking element 9 holds the locking section 6 in the position to form the locking connection, is movable.
[0060] The locking element 9 can also be attached to the fastening part 2 via the mounting section 90 in such a way that the locking section 6 can optionally (also) be moved into the release position (see figure). Fig. 5 ) is movable. The assembly section 90 thus offers both the possibility of simple assembly and a safely guided movement of the locking element 9 for clear and defined guidance of the locking section 6, especially between the operating position (cf. Fig. 4 ) and the solution position (cf. Fig. 5 ).
[0061] How especially the Figures 4 to 9 As can be seen, the assembly section 90 can be connected to the locking section 6 via a connecting section 91 of the locking element 9. The locking element 9 thus formed is preferably integrally formed, for example, as an aluminum die-cast part or injection-molded part.
[0062] How especially the Figures 6 and 7 As can be seen, the assembly section 90, viewed in the direction R of the rotational movement, can have opposing bearing projections 92, 93 on both sides with respect to the connecting section 91, which engage in opposing bearing receptacles 94, 95 in the direction R of the rotational movement for the pivotable mounting of the locking element 9, as this ultimately results in the Figure 8 and 9As can be seen from the figure. In a particularly preferred embodiment, the distance X between the bearing receptacles 94, 95 can be greater than the length L of one of the bearing projections 92 and the width B of the connecting section 91 together Y viewed in the direction R of the rotational movement, as is the case, for example, in Figures 6 and 7 as shown. In this way it is possible, as in Fig. 7As indicated, the locking element 9 is first inserted into one of the bearing receptacles 94 by slightly tilting it with one bearing projection 92. The locking element 9 can then be tilted back so that the pivot axis S, and thus both bearing projections 92, 93, are aligned with both bearing receptacles 94, 95. By laterally displacing the locking element 9 in a sideways movement towards the other bearing receptacle 95, the second bearing projection 93 can also be inserted into this same bearing receptacle 95, so that both bearing projections 92, 93 are inserted into the corresponding bearing receptacles 94, 95, thus securely mounting the locking element 9 so that it can pivot about the pivot axis S. In this position, the locking element 9 can then be easily removed from the installation position (see figure). Fig. 8 ) into the operational position (cf. Fig. 9 ) will be shifted.
[0063] The fastening part (here the luminaire body 2) can further comprise a retaining section 27. This retaining section 27 can, preferably in the position for forming the latching connection, thus preferably in the operating position, limit the latching element 9 and preferably its connecting section 91 on both sides in the direction R of the rotational movement such that the latching element 9 remains attached to the fastening part 2 by means of the mounting section 90 and, in this state, particularly preferably the associated latching section 6 is in the release position (cf. Fig. 5) is movable (here pivotable). The retaining section 27 is preferably formed by two or, in this case, several opposing retaining wall sections 28, 29 of the fastening part 2 and, in the operating position of the locking element 9, accommodates it between itself in the direction R of the rotational movement, so that a lateral movement of the locking element 9 to release it is blocked. Some of the retaining wall sections 28, 29 are formed here adjacent to the bearing receptacles 94, 95 to ensure stable mounting and support over a large pivoting range (towards the operating position and in the operating position) (see the respective right-hand figures in Figs. 7-9 Others are spaced apart from the bearing receptacles 94, 95 to ensure stable support and bearing of the entire locking element 9, and also spaced along its length from the mounting section 90 in the operating position (see the respective left-hand figures in Figs. 7-9 ).
[0064] How especially the Figures 3 to 9 As can be seen, the respective coupling sections 4, 5 and / or locking sections 6, 7 can be provided on a separate coupling part 10. The coupling part 10 can then, for example, be mounted on the luminaire housing 20 to form the luminaire body 2. Similarly, the light transmission element 3 can also be equipped with a corresponding coupling part. These coupling parts 10 can be manufactured, for example, by aluminum die casting or injection molding. Of course, the coupling sections 4, 5 and the locking sections 6, 7 can also be integrally formed with the corresponding luminaire body 2 or light transmission element 3. The invention is not limited here to the embodiments described above.
[0065] In the configuration of the light transmission element 3 as an optical attachment with several housing parts rotatable relative to each other, it is conceivable that one of the housing parts has the second coupling section 5 and the second locking section 7, and preferably the other of the housing parts carries the optical element. The housing parts can be manufactured, for example, by injection molding or aluminum die casting.
[0066] The present invention is not limited to the embodiment described above, provided it is encompassed by the subject matter of the following claims. The features of the embodiment described above can be combined and interchanged with each other in any way.
Claims
1. Luminaire (1) comprising: a luminaire body (2) for accommodating a light source, the luminaire body (2) having a light exit opening (23) for emission of light of the accommodated light source in a light emission direction (A), and a light-transmitting element (3) which can optionally be mechanically coupled to the luminaire body (2) such that light exiting via the light exit opening (23) of the accommodated light source passes through the light-transmitting element (3) for emission of the luminaire (1); wherein the luminaire body (2) has a first coupling section (4) and the light-transmitting element (3) has a second coupling section (5) which cooperate such that the light-transmitting element (3) is movable by a rotation about a rotation axis (D) relative to the luminaire body (2) between a mounting position, in which the luminaire body (2) and the light-transmitting element (3) are separable, and a coupling position, in which the luminaire body (2) and the light-transmitting element (3) are mechanically coupled; characterized in that the luminaire body (2) has a first latching section (6) and the light-transmitting element (3) has a second latching section (7) which, in the coupling position, latch together in a latching connection such that relative rotatability between the luminaire body (2) and the light-transmitting element (3) about the rotation axis (D) is prevented, and in that the luminaire body (2) and / or the light-transmitting element (3), as a fastening part (2, 3), comprises a latching element (9) which has one of the latching sections (6, 7) and a mounting section (90) for removable attachment to said fastening part (2, 3), and the latching element (9) is pivotably supported via the mounting section (90) on the fastening part (2, 3).
2. Luminaire (1) according to claim 1, wherein the rotation axis (D) extends along the light emission direction (A).
3. Luminaire (1) according to one of the preceding claims, wherein the coupling sections (4, 5) together form a bayonet connection and / or wherein one of the coupling sections (4) has a receiving groove (40) extending at least partially around the rotation axis (D) and the other coupling section (5) has a coupling projection that is movable in the receiving groove (40) guided by the rotation movement and / or wherein the luminaire (1) comprises multiple first and second coupling sections (4, 5) which are preferably distributed evenly around the rotation axis (D).
4. Luminaire (1) according to one of the preceding claims, wherein the latching connection is releasable.
5. Luminaire (1) according to one of the preceding claims, wherein one of the latching sections (7) is a latching projection (70) and the other latching section (6) is a latching recess (60), which are configured such that the latching projection (70) in the coupling position engages into the latching recess (60) to form the latching connection.
6. Luminaire (1) according to claim 5, wherein the latching projection (70) extends radially with respect to the rotation axis (D) and preferably towards the rotation axis (D), and wherein the latching recess (60) extends radially with respect to the rotation axis (D) and preferably towards the rotation axis (D) as a recess and / or wherein the latching recess (60) is bounded on both sides, as seen in the direction (R) of rotation, by latching wall sections (61, 62), wherein preferably at least the latching wall section (61) facing the mounting position has a peripheral ramp section (63) to guide the latching projection (70) during rotation from the mounting position towards the coupling position into the latching recess (60), wherein preferably the latching wall section (62) facing away from the mounting position projects, with respect to the latching recess (60), radially (relative to the rotation axis D) higher than the other latching wall section (61).
7. Luminaire (1) according to one of the preceding claims, wherein at least one of the latching sections (6) is biased (preferably radially relative to the rotation axis D) toward the other latching section (7) in the coupling position or toward the latching connection, so as to urge into the latching connection in the coupling position; wherein preferably the latching sections (6, 7) are configured such that the at least one biased latching section (6) is deflected against its bias during rotation from the mounting position towards the coupling position (preferably radially relative to the rotation axis D) and thereby, preferably via guidance over the ramp section (63), is urged into the latching connection in the coupling position against that deflection.
8. Luminaire (1) according to claim 7, wherein the biased latching section (6) has a spring element (8) to bias said latching section (6), and / or wherein the biased latching section (6) is movable, against its bias, into a release position (preferably radially relative to the rotation axis D) to allow relative rotation between the luminaire body (2) and the light-transmitting element (3) even in the coupling position, preferably at least back towards the mounting position; wherein preferably the biased latching section (6) has a release portion (64), further preferably a release protrusion, via which an operator can move the biased latching section (6) into the release position; wherein furthermore preferably the release portion (64) projects to the outside through an opening (26) of the part (2) that carries the biased latching section (6), flush with the outside of that part (2) at least in the coupling position.
9. Luminaire (1) according to one of the preceding claims, wherein the latching element (9) comprises the biased latching section (6) and further the mounting section (90) for removable attachment to the fastening part (2, 3).
10. Luminaire (1) according to one of the preceding claims, wherein the latching element (9) is attached via the mounting section (90) to the fastening part (2, 3) such that the latching element (9) is movable between an installation position, in which the latching element (9) is removable from the fastening part (2, 3), and an operating position, in which the latching element (9) holds the latching section (6) in the position for forming the latching connection, and / or wherein the latching element (9) is attached via the mounting section (90) to the fastening part (2, 3) such that the latching section (6) is optionally movable into the release position, if present.
11. Luminaire (1) according to one of the preceding claims, wherein the mounting section (90) and the latching section (6) are connected by a connecting section (91); wherein preferably the mounting section (90) has on opposite sides (in the direction R of the rotational movement relative to the connecting section 91) projecting bearing protrusions (92, 93) which engage in opposite bearing receptacles (94, 95) for pivotally supporting the latching element (9); wherein further preferably the distance (X) between the bearing receptacles (94, 95) is greater than the length (L) of one of the bearing protrusions (92, 93) plus the width (B) of the connecting section (91) together (Y) as measured in the direction (R) of the rotational movement.
12. Luminaire (1) according to one of the preceding claims, wherein the fastening part (2, 3) has a retaining section (27) which, in the position for forming the latching connection (preferably in the operating position), limits the latching element (9) and preferably its connecting section (91) on both sides in the direction (R) of the rotational movement such that the latching element (9) remains attached via the mounting section (90) to the fastening part (2, 3) and, in that state, preferably the associated latching section (6) is movable into the release position; wherein the retaining section (27) is preferably formed by retaining wall sections (28, 29) of the fastening part (2, 3) opposite one another in the direction (R) of the rotational movement.
13. Luminaire (1) according to one of the preceding claims, further comprising spring elements which are provided axially with respect to the rotation axis (D) between the luminaire body (2) and the light-transmitting element (3) and preferably distributed around the rotation axis (D), in order to bias the luminaire body (2) and the light-transmitting element (3), at least their coupling sections (4, 5), axially at least in the coupling position.
14. Luminaire (1) according to one of the preceding claims, further comprising a light source, preferably comprising an LED, which is accommodated in the luminaire body (2) such that light is emitted via the light exit opening (23) and, when the light-transmitting element (3) is mechanically coupled to the luminaire body (2), also through the light-transmitting element (3) for the light output of the luminaire (1).
15. Luminaire (1) according to one of the preceding claims, wherein the light-transmitting element (3) is a ring or an optical attachment, such as a lens or an objective; wherein the optical attachment comprises an optical element (30) such as a lens or a diffusing disc; wherein the optical attachment is preferably displaceable or repositionable along the light emission direction (A) or axially along the rotation axis (D); wherein the optical attachment has at least two housing parts rotatable relative to each other in order to optionally change a distance of the optical element (30) from the luminaire body (2) along the light emission direction (A) or axially along the rotation axis (D); wherein one of the housing parts has the second coupling section (5) and the second latching section (7) and preferably the other housing part carries the optical element (30).