Attachment element

Abstract

The invention relates to an attachment element for electrically attaching an LED lighting device, the LED lighting device having a circuit board which is provided with a contact region for supplying power to the LEDs, and furthermore, the attachment element has a substantially annular frame, the invention relates to an attachment element for an LED lamp, comprising a frame provided for covering a circuit board and mechanically holding the circuit board on an arrangement surface of a heat sink, comprising a contact assembly which is supported in the frame and is used for supplying power to the LED, the frame being divided into a first ring and a second ring, the first ring is arranged as an outer ring for surrounding the circuit board and holding the circuit board parallel to the arrangement surface of the cooling body, and the second ring is inserted as an inner ring coaxially in the outer ring and at least partially covers the circuit board and is arranged for holding the circuit board in the vertical direction relative to the arrangement surface of the cooling body, the invention is characterized in that the attachment element has a fastening part, which is inserted in a receptacle in the outer ring, and the inner ring has a support for the fastening part, which engages in the support substantially parallel to the arrangement surface of the cooling body and fixes the inner ring in the outer ring.

Description

Technical Field

[0001] The present invention relates to an attachment element for electrically attaching an LED lighting device, wherein the LED lighting device has a circuit board provided with contact areas for supplying power to the LED, and the attachment element has a substantially annular frame, which is configured to cover the circuit board and mechanically hold the circuit board on the arrangement surface of a cooling body, and the attachment element has a contact component, which is supported in the frame and is used to supply power to the LED. Background Art

[0002] An attachment element according to this category is known from German Patent DE 10 2008 005 823 A1 by the present applicant. In this German patent, a ring-shaped element covers a printed circuit board and holds it between itself and a support, in particular a heat sink. The ring-shaped element is designed so that it has a housing for a contact element. The contact element is brought into contact with the contact area of the LED printed circuit board. The attachment conductor is pushed into the housing from the outside and held in the clamping section. At the same time, the ring-shaped element has a receptacle for a fastening element (e.g., a screw bolt) so that it can be fastened to the heat sink. The annular frame of the attachment element thus ensures not only a secure and solder-free electrical contacting of the LED but also its fastening to the heat sink.

[0003] During this period, LED technology has developed significantly. Currently, most commonly used are COBs (chip-on-board) (COBs), which carry multiple different LED chips on a carrier printed circuit board. These COBs have a small installation depth and are available in a wide range of brightness, sizes, and shapes. However, the challenge remains to reliably make electrical contact with the LED printed circuit board and simultaneously securely hold it on the heat sink.

[0004] DE 20 2023 105 716 U1 from the applicant shows a further development of an attachment element according to this generic class, wherein the aforementioned ring element is divided into two parts and consists of a first ring as an outer ring and a second ring as an inner ring. The outer ring here has the task of laterally holding the LED circuit board on the heat sink, while the inner ring is inserted concentrically into the outer ring, partially enclosing the LED circuit board and thus securing it.

[0005] This facilitates not only the assembly of the lighting unit, but also the pre-assembly and storage of partially assembled units consisting of the heat sink and the first ring, and also the subsequent replacement of the LED printed circuit board.

[0006] At the same time, the market demands that the attachment element be as flat as possible, as excessively strong projections could partially shadow the LED. This reduces light output, but also primarily reduces the preset radiation angle. The flatter the design, the closer the reflector can be to the LED. However, secure installation of the printed circuit board remains a requirement. Furthermore, the printed circuit board must be precisely positioned in its installed position to ensure full performance. The printed circuit board must be securely held, yet simple replacement in the assembled state must still be possible. Summary of the Invention

[0007] The object of the present invention is therefore to provide an additional secure fastening option for an LED printed circuit board in an attachment element of the aforementioned generic type, which takes the aforementioned challenges into account.

[0008] This object is achieved by an attachment element having the characteristics described below, in particular the following attachment element: in the attachment element, the frame is divided into a first ring and a second ring, the first ring being an outer ring arranged to surround the circuit board and hold the circuit board in a parallel direction relative to the arrangement surface of the heat sink, the second ring being an inner ring coaxially inserted into the outer ring and at least partially covering the circuit board, and being arranged to hold the circuit board in a vertical direction relative to the arrangement surface of the heat sink, wherein the attachment element has a fastening component which is inserted into a receptacle in the outer ring, the inner ring having a seat for the fastening component, and the fastening component is embedded in the seat in a radial direction substantially parallel to the arrangement surface of the heat sink and fixes the inner ring in the outer ring, wherein the fastening component includes a pivot axis which fixes the inner ring in the outer ring.

[0009] According to the present invention, the fastening element applies a substantially radial force to the inner ring, thereby supporting the outer ring. Overall, the outer ring, fastening element, and inner ring interact for mutual fixing in a plane parallel to the circuit board or the mounting plane or the surface of the heat sink. This is particularly advantageous because neither the inner ring nor the fastening element protrudes in height relative to the outer ring. This is particularly important in COB technology, as the flat design of the attachment element improves light output.

[0010] According to the invention, it is advantageous if the attachment element has two pivot lugs that are arranged diagonally opposite each other and that secure the inner ring in the outer ring. The two fastening elements exert their forces, which act essentially in the radial direction, on each other and thus securely secure the inner ring between them.

[0011] A preferred embodiment of the present invention provides that the fastening element comprises a pivot lug which fixes the inner ring in the outer ring. In this embodiment, the invention also prescribes that the fastening element (here the pivot lug) engages in the support parallel to the arrangement surface of the heat sink.

[0012] The fastening principle of this embodiment of the present invention is based on a pivot disk inserted into the outer ring. The pivot axis, about which the pivot disk can be rotated, is oriented vertically and therefore parallel to the installation direction. The pivot disk includes an elongated section, the pivot lug, which can be pivoted out of its rest position in the inner ring to secure the inner ring. This section can be designed, for example, in the form of a wedge or tongue.

[0013] According to the invention, the pivot lug engages in a seat on the inner ring of the attachment element, wherein the seat is formed as a radial retaining projection or retaining lug, which the pivot lug covers in order to fix the inner ring. Preferably, the retaining lug projects beyond the otherwise circular contour of the inner ring and provides a surface oriented parallel to the pivot plane, which the pivot lug engages with its underside.

[0014] The positive connection between the surface of the retaining projection and the underside of the pivot lug results in the inner ring being fastened to the outer ring via the pivot lug. According to the invention, it is also conceivable that the pivot lug engages in a seat which is closed toward the light exit side, for example a groove in the outer circumference of the inner ring.

[0015] Preferably, in this embodiment, the outer ring of the attachment element forms a housing for a pivot lug, which is inserted into the housing by means of a journal perpendicular to the arrangement plane and can be pivoted from the housing about its longitudinal axis onto the retaining lug. The housing is open toward the inner ring in order to allow the pivot lug to be removed.

[0016] It is particularly advantageous if the pivot lug has a receiving profile for an unlocking tool. With the aid of the unlocking tool, the pivot lug can be released from the friction surface pairing and pivoted back into the housing in the outer ring. The inner ring is then free and can be released from the outer ring, for example, to replace a circuit board.

[0017] Additionally, the outer ring can form a profile groove in the region of the pivot lug for inserting the associated retaining lug. Preferably, the profile groove corresponds exactly to the outer contour of the inner ring in the region of the retaining lug.

[0018] 14. The repairing kit for automotive dents, according to claim 13, wherein the footwear component of the footwear component of the footwear component is made up of a plurality of footwear elements, each of which is adapted to be worn by a user as the footwear component of the footwear component.

[0019] Preferably, the attachment element has two spring clips, which are arranged diagonally opposite each other and which secure the inner ring in the outer ring.

[0020] Here, the spring clip is constructed so that the outer wall of the inner ring directly abuts on the spring clip in the abutment area of the retaining leg. The spring arms extending from the retaining leg surround the outer wall of the inner ring and, by means of spring force, the inner ring is fixed in the outer ring.

[0021] Preferably, each spring arm has a retaining lug on its free end pointing toward the inner ring. The inner ring is provided with a wall cutout, and each retaining lug overlaps a fixing surface in the wall cutout, so that an additional retaining force acting in the direction of the arrangement surface is applied to the inner ring.

[0022] Each clip spring thus has a total of two retaining lugs, which are oriented parallel to one another and act on the inner ring. These retaining lugs, on the one hand, transmit the radially acting force of the clip springs to the inner ring, and on the other hand, supplementally secure the inner ring vertically in the installation direction. Thus, a circuit board positioned within its insertion contour is securely held in its position between the inner and outer rings.

[0023] In a preferred embodiment of the invention, the spring arms each have a support section on their free ends, which is perpendicular to the retaining legs. The support section of the spring clip rests on the bottom of the outer ring and surrounds two corresponding retaining projections of the inner ring.

[0024] As leaf springs with small dimensions and material thickness, spring clips absorb high forces in the attachment element. Therefore, for example, they can easily twist when inserting the inner ring. This twisting can be avoided if the spring arms can be supported laterally on the bottom row of the outer ring using support sections. At the same time, if the spring arms surround the inserted inner ring from the outside and hold it between them, they provide additional stability.

[0025] In this embodiment of the present invention, it is particularly preferred that the receiving portion structure for the spring clip is in the form of a basin in the bottom of the outer ring. By forming the recessed portion in the part of the outer ring as a basin or receiving portion, the spring clip is particularly safely supported in the outer ring.

[0026] The supporting section then lies flat on the basin bottom and holds the spring clip in its position.

[0027] In addition, the structural height of the spring clamp can be maximized. Thus, for example, wide spring arms can be used, which exert an even better holding force relative to the inner ring.

[0028] Furthermore, in this embodiment it is conceivable that tolerances in the overall height of the inner ring or of the spring clip can also be better compensated, since play is provided in this case in the installation direction.

[0029] Furthermore, it is advantageous if the spring clip forms a main body projection extending from the contact area, the surface of which serves as a support for an arrangement device, by means of which the attachment element can be fastened to the heat sink. The main body projection has an opening that corresponds to the borehole in the outer ring for passing the arrangement device through.

[0030] The main projection preferably extends toward the outer edge of the outer ring, opposite the spring arms. The outer ring is preferably cut out at this location, and a recess is formed therein for inserting the main projection. Since the spring clip is preferably made of metal, the main projection forms a robust mount for accommodating means, such as screws, used to secure the attachment element to the heat sink. Metal, as a mount for the screw head, offers significant advantages over plastic, as metal withstands pressure better and is more tolerant of deformation. The recess is selected so that the tightened screw head does not protrude beyond the upper side of the outer ring.

[0031] Another special advantage is that the outer ring and the spring clip can be preassembled together on the heat sink.Then, the spring clip is fastened to the outer ring in the area of the body protrusion so that the LED printed circuit board and the inner ring can be inserted in a second assembly step.

[0032] A third embodiment of the present invention provides that the fastening component comprises a spring-loaded locking element that secures the inner ring in the outer ring. Force dissemination is particularly advantageous here. The holding force of the fastening component acts radially, and therefore parallel to the arrangement plane on the heat sink. Consequently, the overall height of the attachment element can be reduced, without the fastening element protruding.

[0033] According to a preferred embodiment, the outer ring forms a housing for a spring-loaded locking element, which is open toward the inner ring and into which the locking element is inserted so as to be movable in the radial direction. The arrangement of the housing within the annular collar of the outer ring ensures that, when the locking element rests on the outer wall of the outer ring, it travels the maximum possible distance in the direction of the inner ring. This maximizes the spring travel in the attachment element, and the spring can exert its maximum force on the locking element.

[0034] According to the present invention, the locking element includes a bolt and a compression spring, wherein the compression spring is inserted into the housing and presses the bolt radially toward the inner ring. If the spring of the locking element can be supported on the inner and outer walls of the outer ring, the spring travel in the attachment element is maximized, and the spring can exert its maximum force on the locking element.

[0035] The inner ring forms a locking wedge as a locking abutment. This locking wedge interacts with the tensioning element, with the lower wedge surface serving as a retraction surface. The locking wedge, with its wedge tip, points in the direction of the outer ring or the locking bolt. When the inner ring is inserted into the outer ring, the lower wedge surface of the locking wedge, pointing in the insertion direction, initially contacts the upper side of the bolt. The inclined surface on the underside of the wedge guides the bolt back into the housing, counteracting the spring tension, allowing the inner ring to be immersed in its installed position.

[0036] The upper wedge surface of the locking wedge preferably serves as a locking surface, which interacts with a stop surface on the underside of the bolt and secures the inner ring in the outer ring. The stop surface and the locking surface form a friction-locking connection. If two diagonally opposite locking elements interact, they hold the inner ring particularly securely between them.

[0037] In this case, it is advantageous if the locking surface and the blocking surface form an inclined surface pairing which deflects the radially acting force of the compression spring in the direction of the arrangement surface.

[0038] In summary, in this embodiment, any spring element can be used that can compress the bolt in the radial direction in the direction of the inner ring parallel to the arrangement surface of the heat sink. For example, the compression spring of the tensioning element can be a coil spring or a leaf spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Further advantages of the present invention and a better understanding of the present invention can be found in the following description of several exemplary embodiments. The accompanying drawings show: Figure 1 An embodiment of the invention is shown in an exploded view, which has a spring clip according to the invention. Figure 2 Show Figure 1 A perspective view of the embodiment shown in the assembled state, Figure 3 Show Figure 1 A top view of the embodiment shown in the assembled state, Figure 4 Show the basis Figure 1 In the assembled state along Figure 3 The cross-sectional view along the section line AA is shown, Figure 5 Shown along the Figure 3 The subsection of the section line BB marked in FIG. 1 , in particular with respect to the supporting element of the spring clip, Figure 6 A further embodiment of the invention is shown in an exploded view, which has a pivot lug according to the invention as a fastening element. Figure 7 Show Figure 6 A perspective view of the embodiment shown in the assembled state, Figure 8 Show Figure 6 A top view of the embodiment shown in the assembled state, Figure 9 Show the basis Figure 6 In the assembled state along Figure 8 The cross-sectional view along the section line AA is shown, Figure 10 A third embodiment of the invention is shown, which has a locking element according to the invention, Figure 11 Show Figure 10 A perspective view of the embodiment shown in the assembled state, Figure 12 Show Figure 10 A top view of the embodiment shown in the assembled state, Figure 13 Show the basis Figure 10 The second embodiment in the assembled state is along Figure 12 The cross-sectional view along the section line AA is shown, Figure 14A third embodiment variant of the invention is shown, which has a locking element according to the invention, which is here supported by a leaf spring. DETAILED DESCRIPTION

[0040] exist Figures 1 to 5 In the embodiment of the present invention, the reference number 100 is provided in its entirety. Figures 6 to 9 Another embodiment of the present invention is shown in FIG. This embodiment is generally designated by the reference numeral 200. Figures 10 to 13 A third embodiment of the present invention is presented in FIG. This third embodiment is generally designated by reference numeral 300. Figure 14 The variant proposed in Figure 14 The entire structure is designated by reference numeral 400 .

[0041] In all the drawings, the loading direction E is defined as vertical in the direction of the arrangement plane A on the surface of the cooling body 500 , and the light exit direction L is defined as vertical away from the arrangement plane A.

[0042] The arrangement plane A as the surface of the cooling body 500 applies to all embodiments, but is only used as an example. Figures 10 to 14 It is shown in FIG. 1 , on which arrangement plane all embodiments of the invention according to the invention can be mounted.

[0043] The same applies to all figures: the system axis S extends in the light emission direction L through the center point of the arrangement of the outer and inner rings 110 / 130 , 210 / 230 , 310 / 330 , 410 / 430 .

[0044] Figure 1 An embodiment of the present invention is shown in an exploded schematic view, having an attachment element designated as a whole by the reference numeral 100. The attachment element 100 comprises a substantially annular frame 105, which is composed of a first ring 110 and a second ring 130. The first ring is also referred to as the outer ring 110, and the second ring is referred to as the inner ring 130.

[0045] The outer ring 110 and the inner ring 130 hold an LED printed circuit board or circuit board 150 having LEDs 151 and corresponding contact areas 152 for electrical attachment therebetween.

[0046] Contact elements (not shown in detail) are placed in the annular frame 105 of the attachment element 100 , which interact with the contact region 152 and enable electrical contacting of the LED 151 .

[0047] Furthermore, the attachment element 100 comprises two fastening components in the form of two spring clips 170, which secure the inner ring 130 in the outer ring 110. The attachment element 100 or the outer ring 110 is fastened to a placement surface of the heat sink 500 (not shown) by means of screws 190, so that the circuit board 150 with the LEDs 151 is held between the attachment element 100 and the heat sink 500.

[0048] With respect to the arrangement plane A of the attachment element 100 according to the present invention on the cooling body 500, reference is made to Figures 10 to 14 ,exist Figures 10 to 14 , a heat sink 500 is correspondingly shown, which can also be used in this embodiment 100 .

[0049] Of course, according to the present invention, it is also conceivable to fasten the attachment element 100 to the arrangement plane of any other support instead of the arrangement plane of the heat sink 500 .

[0050] The outer ring 110 has a bottom side 111 and a top side 112 . For assembly, the bottom side 111 is placed on the surface of the heat sink 500 in the installation direction E. The top side 112 points in the light emission direction L.

[0051] The outer ring 110 first has a cutout 114 on its base plate 113. The cutout 114 is cut so that it can be divided into a substantially square insertion contour 115 and a further engagement contour 116. These contours merge into one another. The insertion contour 115 is used to accommodate a circuit board 150. The engagement contour 116 allows the circuit board 150 to be released from its installed position without damage.

[0052] The bottom plate 113 also has two opposite, cup-like recesses 117. Each of these recesses 117 has a substantially arc-like contour. The recesses 117 are supplemented by cutouts 118 in the outer ring 110. The cutouts 118 and recesses 117 merge into one another and form a receiving cup 119. During assembly, the spring clip 170 is inserted into this receiving cup 119.

[0053] The spring clamp 170 is made of a punched metal sheet with various protrusions, each of which fulfills its own function. First, the spring clamp has a main protrusion 171, which serves as a fastening base and has a bore 172 for passing a mounting element, which in this case is a screw bolt 190.

[0054] Advantageously, the drilled opening 172 coincides with the drilled hole 120 in the cutout 118 of the outer ring 110 . The screw 190 can be guided simultaneously through both openings 172 and 120 . This means that the outer ring 110 and the spring clip 170 can be fastened simultaneously to the arrangement plane A, i.e., the surface of the heat sink 500 . This simplifies preassembly. In this way, a partially assembled assembly consisting of the heat sink 500 , the outer ring 110 , and the fastening element 170 can also be stored.

[0055] The main body projection or fastening base 171 is oriented parallel to the arrangement plane A or the base plate 113. Retaining legs 173 are arranged on this fastening base 171. Here, the punched metal sheet of the spring clamp 170 is bent 90° in the light emission direction L. Consequently, the retaining legs 173 are perpendicular to the arrangement plane A and form a contact surface 174 against which the outer wall 136 of the inner ring 130 rests during assembly.

[0056] In the transition area between the fastening base 171 and the retaining legs 173, the metal sheet is not simply bent at a right angle, but rather a spring arc 175 is formed in the bend angle. On the one hand, this spring arc ensures a sufficient distance between the bore 172 and the retaining legs 173 for supporting the screw head 191, and on the other hand, it enables an additional radial spring force of the retaining legs 173 in the direction of the outer wall 136 of the inner ring 130.

[0057] Each spring arm 176 extends from the retaining leg 173 in two directions to the height of the circumference of the inner ring 130. Each spring arm 176 is radially deflected in the direction of the inner ring 130. The spring arms 176 spring about an axis that extends perpendicularly through the retaining leg 173, parallel to the installation direction E. They exert a spring force acting parallel to the arrangement plane A on the outer wall 136 of the inner ring 130. Since two spring clamps 170 are diagonally opposed in each attachment element 100 according to this embodiment, the spring forces of the spring arms 176 always cancel each other out, thus clamping the inner ring 130 in the outer ring 110 between the spring arms.

[0058] The spring arms 176 each have a retaining lug 177 at their free ends. The retaining lugs 177 cover the inner ring 130, which will be described first.

[0059] The inner ring 130 also has a bottom side 131 and a top side 132 . The bottom surface 131 of the inner ring 130 is oriented in the installation direction E toward the bottom plate 113 of the outer ring 110 and covers the printed circuit board 150 .

[0060] According to the invention, both the outer ring and the inner ring 110 / 130 can contain openings or housings for accommodating contact elements for electrical contacting of the LEDs 151 , which are not shown in detail here.

[0061] Inner ring 130 has an annular opening 133 at its center, the dimensions of which roughly correspond to the outer circumference of LED 151, so that the base of an inserted LED 151 is flush with the edge of opening 133. An inner wall 134 of inner ring 130 extends from its upper side 132 in a funnel shape toward annular opening 133. The funnel shape facilitates maintaining an optimal radiation angle of LED 151.

[0062] Wall cutouts 135 can be found at four opposite locations. The outer wall 136 is cut four times in a roughly cuboid shape, distributed over the outer circumference of the inner ring 130. The imaginary cuboid shape is not completely symmetrical—the bottom of the wall cutouts 135 in the inner ring 130 is cut slightly sloped here—and the cutouts 135 become deeper toward the outside.

[0063] In this way, four retaining ramps 137 are formed. Here, the ramp tops 138—the flattest parts of the ramps—are each directed in the direction of the outer ring 110 , more precisely in the direction of the spring arms 176 of the spring clamp 170 .

[0064] In the assembled state, the retaining lug 177 formed by the bent protrusion of the spring arm 176 covers the retaining ramp 137. Here, the top 178 of the retaining lug 177 exerts pressure in the direction of the top 178 of the opposite retaining lug 177, which is opposite to the top.

[0065] The underside 179 of the retaining lug 177 rests on the surface 139 of the retaining ramp 137. This applies a supplementary pressing force, oriented perpendicularly to the arrangement plane A, to the inserted inner ring 130, which additionally holds the inner ring 130 in the outer ring 110 in the assembled state.

[0066] Furthermore, the lateral inner surfaces 180 of the retaining lugs 177 can rest against the vertical cutout walls 140 of the wall cutouts 135. Here, an additional retaining force can also be exerted on the sections of the inner ring 130 located between the wall cutouts 135.

[0067] In this way, the wall cutout 135 as a whole serves as a seat for the spring clip 170 .

[0068] Figure 2 An embodiment of an attachment element 100 according to the invention is shown in a top perspective view in the assembled state. Figure 1The outer ring 110 and the inner ring 130 described in detail in the drawings are assembled together to hold the circuit board 150 between the circuit board 150 and the arrangement surface A (not shown) of the heat sink 500 , wherein the spring clip 170 fastens the inner ring 130 in the outer ring 110 and securely holds the inner ring.

[0069] For assembly, the inner ring 130 is placed from above in the installation direction E onto the outer ring 110, which is already pre-assembled on the arrangement plane A of the heat sink 500 and which also already carries the spring clip 170. Advantageously, the outer and inner rings are fastened together simultaneously via screws 190, which are also used for assembly on the heat sink 500.

[0070] The inner ring 130 is placed from above onto the retaining lugs 177 of the spring clamp 170 in the installation direction E and clamped by manual pressure in the installation direction E without the need for additional tools. The retaining lugs 177 then rebound and slide back onto the retaining ramps 137 guided by the spring force into their secured position.

[0071] In the installed state, it becomes clear that the spring clip 170 is inserted into the receiving cup 119 formed by the depression 117 and the cutout 118 and does not protrude relative to the overall height of the outer ring 110 .

[0072] The main projection 171 of the spring clip 170 forms a stable seat for the underside 192 of the screw head 191 with its fastening base oriented parallel to the arrangement plane A. Compared to the surfaces 112 , 132 of the attachment element 100 , which are otherwise made of plastic, the bracket made of metal is shatterproof and possibly flexible, so that the attachment element 100 can be securely and firmly fastened to the surface of the heat sink 500 by means of the screw 190 .

[0073] At the same time, the main body projection 171 provides a stable hold for the retaining legs 173 by means of a curved transition in the form of a spring arc 175. The retaining legs are supported on the main body projection 171 via the spring arc 175 in a slightly resilient manner and can thus successfully support the inner ring 130, while the spring arms 176 surround the outer wall 136 of the inner ring 130 and are held between retaining lugs 177 arranged on the free ends.

[0074] Figure 3The attachment element according to embodiment 100 of the present invention is shown from above in a top view. The shape of the spring clips 170, which serve as the fastening element between the outer ring 110 and the inner ring 130, is clearly visible. First, the main projections 171 of the two spring clips 170 can be seen on both sides, on the metal surface of which the screw heads 191 of the screw bolts 190 rest. From above, it can be seen that the spring arches 175 provide sufficient clearance between the screw heads 191 and the retaining legs 173. The retaining legs 173 rest on their inner sides against the outer wall 136 of the inner ring 130.

[0075] From there, the spring clamp 170 branches into two spring arms 176, which surround the inner ring 130. A retaining lug 177 is located at each free end of the spring arms 176, which engages a cuboid cutout 135 in the inner ring 130. Entirely on the outside, the spring arms 176 also form a support section 181, which supports the spring clamp 170 in the bottom of the receiving cup 119 of the outer ring 110 when the inner ring 130 is inserted.

[0076] It also becomes clear that the two opposing spring clips 170 hold the inner ring 130 between them and that the holding force for securing the inner ring 30 in the outer ring 110 extends essentially parallel to the arrangement plane A of the heat sink 500 .

[0077] Figure 4 Shown along the Figure 3 The cross-sectional view of the section line AA is drawn in FIG. Figure 2 and 3 As shown, the inner ring 130 is also fastened to the outer ring 110. The screw head 119, supported on the body projection 171, can be clearly seen in the left-hand cutout 118. This section shows the LED 151, inserted into the cutout 114 of the underside 111 of the first ring 110, with its printed circuit board 150, and resting in one plane on the surface of the heat sink 500 and the arrangement plane A. The inner ring 130 is inserted into the outer ring 110 and secures the printed circuit board 150 underneath. For effective securing, a spring clamp 170 is provided, which has latching or retaining lugs 177 that secure the inner ring 130 at opposing locations.

[0078] The spring clip 170 is carefully constructed Figure 5This section again becomes clear in the cutout shown. In this sectional view, not only the fastening of the spring clip 170 in the outer ring 110 via the body projection 171, the retaining legs 173 and the spring arms 176 can be seen, but also the support of the retaining lugs 177 on the retaining ramps 137 of the inner ring 130 and the lateral support of the spring clip 170 by the support sections 181, which are bent at a right angle in the direction of the inner ring 130.

[0079] The supporting section 181 no longer only provides stability for the spring clip 170 , in particular when inserted into the inner ring 130 , but also additionally surrounds the adjacent retaining ramps 137 from the outside and is therefore an additional securing factor.

[0080] Figure 6 Another embodiment of the invention 200 is presented according to a cross-sectional view. In this embodiment 200, the arrangement of the attachment element 200 also comprises a substantially annular frame 205 consisting of a first ring 210 and a second ring 230, as well as an LED circuit board 250 and a pair of fastening elements 270 for fastening the inner ring 230 in the outer ring 210 and thus locking the inserted circuit board 250.

[0081] The outer ring 210 consists of a substantially circular frame 205 with a bottom side 211, by means of which it is placed and fastened to the top side or mounting surface of the heat sink 500. To this end, the outer ring 210 has two opposite boreholes 217, through which the arrangement elements 290 (for example, screws in this case) are guided in the installation direction E and fixed in the heat sink 500. Advantageously, in this embodiment, the boreholes 217 are arranged such that the boreholes on the top side 212 of the outer ring 230 are dimensioned such that the screw heads 291 of the screws 290 can be recessed. Consequently, these screw heads do not protrude relative to the surface of the attachment element 200.

[0082] The outer ring 210 also has an upper side 212 pointing in the light emission direction L. Inside the outer ring 210, a base plate 213 can be seen, which is provided with a cutout 214. This cutout 214 is provided for accommodating an LED printed circuit board 250 and is shown only schematically. In principle, this cutout 214 is adapted to the dimensions of the LED printed circuit board 250 and includes an insertion contour 215 (shown only schematically) and an engagement contour 216, which enables the LED printed circuit board 250 to be inserted into or released from its receptacle in the base 213 of the outer ring 210 in a damage-free manner.

[0083] The outer ring 210 also has two opposing housings 218 for accommodating the fastening elements 270. The otherwise substantially circular contour of the outer ring 210 is widened in this region at the outer circumference. This contour widening 219 enables the intended movement path of the fastening elements 270 without them being pivoted out of the outer ring 210.

[0084] Furthermore, the outer ring 210 is open on its upper side 212 in the region of the housing 218 in order to enable the fastening element 270 to be inserted in the installation direction E.

[0085] Furthermore, the housing 218 is provided with an opening 220 facing the interior of the outer ring 210 . A fastening element 270 is pivoted out of this opening 220 in order to fix the inner ring 230 .

[0086] The inner ring 230 also has a bottom side 231 and a top side 232 . The bottom side 231 is oriented in the installation direction E toward the base plate 213 of the outer ring 210 and thereby covers the printed circuit board 250 .

[0087] According to the invention, both the outer ring and the inner ring 210 / 230 can contain openings or housings for accommodating contact elements, which are not shown in detail here.

[0088] Inner ring 230 has an annular opening 233, the dimensions of which roughly correspond to the outer circumference of LED 251, so that the base of an inserted LED 251 is flush with the edge of opening 233. An inner wall 234 of inner ring 230 extends from its upper side 232 in a funnel shape toward annular opening 233. The funnel shape facilitates maintaining an optimal radiation angle of LED 251.

[0089] The outer contour of the inner ring 230 is primarily annular—it widens outward at two opposite locations. The inner ring 230 is provided with retaining projections or retaining lugs 235. The retaining projections 235 are projections on the lower edge of the inner ring 230, pointing in the direction of the arrangement plane A, that are approximately bell-shaped in outline. The overall height of this edge is only approximately one-quarter the height of the outer wall of the inner ring 230. This projection (also referred to as retaining lug 235) extends in the direction of the outer ring 210.

[0090] The outer ring 210 is correspondingly cut out at corresponding locations in its inner peripheral contour to allow seamless insertion of the inner ring 230. After insertion, the retaining lugs 235 lie flat in one plane together with the underside 231 of the inner ring 230 on the bottom 213 of the outer ring 210. In the region of these cutouts, the housing 218 is also arranged in the outer ring 230, and the fastening element 270 is inserted therein.

[0091] exist Figure 6 2 also shows an eccentric-like fastening element 270 in the exploded view. This eccentric-like fastening element initially comprises a journal 271 that can be inserted into a corresponding recess 221 in the housing 218 in the installation direction E. The fastening element 270 is pivotable about a longitudinal axis extending through the journal 271. The fastening element 270 has a pivot disk 272 with a shorter guide section 273 and a longer fastening section 274, which is also referred to herein as a pivot lug 274 or pivot element.

[0092] In this embodiment, the outer contour of the pivot plate 272 is oval, but other contours are also conceivable according to the present invention. The oval contour is advantageous because it can only be inserted into the housing 218 in a specific position and can no longer slide off laterally after the inner ring 230 has been inserted and locked.

[0093] The fastening element 270 has a receiving profile 275 on its upper side pointing in the light emission direction L, into which an unlocking tool can engage. A simple slotted profile 275 is shown, for example a slotted profile for a screwdriver. Other profiles are also conceivable according to the invention.

[0094] The pivoting movement of the pivot lug 274 can be easily performed in the horizontal direction, parallel to the arrangement plane A, using an unlocking tool. The pivot lug 274 is rotated from the housing 218 in the direction of the inner ring 230, which, after the fastening element 270 has been inserted into the housing 218, is still pointed in the circumferential direction of the outer ring 210 in the outer ring 210. The pivot lug then covers the inner ring 230 in the region of the retaining lug 235 and locks it in its installed position in the outer ring 210.

[0095] Figure 7 An embodiment of the present invention is shown in assembled form. The perspective view shows that the inner ring 230 is inserted into the outer ring 210 and houses the circuit board 250. The LED 251 is located in the opening 233 of the inner ring 230 and can optimally radiate its light via the funnel-shaped inner wall 234. The attachment element 200 is fastened to the arrangement surface A of the heat sink 500 by means of two screws 290 extending oppositely through the annular collar of the outer ring 210. The heat sink 500 is not shown here. Two fastening elements 270, also arranged oppositely, are inserted into their respective housings 218. The pivot lugs 274 have been pivoted out of the openings 220 and cover the corresponding retaining projections 235 of the inner ring 230.

[0096] Figure 8This embodiment of the present invention is shown in a top view. Here, the contour cutouts 219 on the inner circumference of the outer ring 210 can once again be clearly seen. It can also be clearly seen that the outer contour of the outer ring 210 in the area of the housing 218 also deviates from the normal circular contour and protrudes slightly outward. The housing shape is selected so that the fastening element 270 can be rotated from its rest position into the fastened position within the housing 218 without protruding beyond the outer ring 210.

[0097] Figure 9 Along the Figure 8 This fastening position is shown in the sectional view along the section line AA indicated in FIG. The fastening element 270 is inserted into its housing 218. The pivot pin 271 is rotatably inserted into its recess 221. The pivot lug 274 has been pivoted into the fastening position and covers the retaining lug 235. A surface fit is created between the underside of the pivot lug 276, which points in the installation direction E, and the surface of the retaining projection 235 of the inner ring 230, which points in the light emission direction L. This secures the inner ring 230 in the outer ring 210. The inner ring 230 covers the circuit board 250 and securely locks it in place in the attachment element 200. The pressing force of the pivot lug 276 is transmitted to the circuit board 250. The fastening element 270 can be pivoted back from its fastening position to the rest position using a suitable release tool, freeing the inner ring 230 and allowing it to be removed from the outer ring 210.

[0098] Figure 10 An overview of a third embodiment of the present invention is provided, in which a spring-loaded locking element 370 is used for fastening. As in the other embodiments 100, 200, the arrangement 300 consists of a substantially annular frame 305 (which consists of an outer ring 310 and an inner ring 330), a circuit board 350, and a pair of fastening elements 370 for securing the inner ring 330 in the outer ring 310 and, therefore, the embedded circuit board 350.

[0099] The outer ring 310 consists of a substantially circular frame, also referred to as an annular collar, which has a bottom side 311 with which it lies flat and is fastened to the top side or arrangement surface A of the heat sink 500. Figure 13 Sectional view and Figure 11 The outer ring 310 has bores for screw bolts or other equivalent arrangement elements 390 in the installation direction E. However, this embodiment also provides that the arrangement elements, such as screw bolts 390, are embedded in the outer ring 310 so that they do not protrude relative to the upper side 312 of the attachment element 300. Figure 11 Put this in perspective.

[0100] The outer ring 310 also has an upper side 312 pointing in the light emission direction L. The bottom plate 313 - as in the other two embodiments - is provided with a cutout 314 which is provided for receiving the LED printed circuit board 350 and Figure 10 It is only shown schematically.

[0101] In principle, such a cutout 314 is adapted to the dimensions of the LED printed circuit board 350 and comprises an insertion contour 315, shown only schematically, and an engagement contour 316, which enables the LED printed circuit board 350 to be inserted into the receptacle or to be released from its receptacle in the bottom 313 of the outer ring 310 in a damage-free manner.

[0102] The annular collar of the outer ring 310 or its outer wall 317 is expanded outwardly in a box-shaped manner at two locations. Figure 12 This is particularly clear in the top view from above. Housing 318 for spring-loaded locking element 370 is housed in these expansions. The radial expansions are necessary to provide the spring travel for spring-loaded locking element 370. Outer ring 310 has openings 320 on its inner wall 319 in the region of housing 318. In this embodiment, housing 318 is closed on all sides and is open only on inner wall 319 to the interior of outer ring 310.

[0103] In the region of the opening 320 , the base plate 313 of the outer ring 310 has a step or abutment edge 321 . This step or abutment edge serves to partially push the locking element 370 , which is movably mounted in the housing 318 , out of the housing 318 .

[0104] Finally, the inner side 319 of the outer ring 310 is still slightly undercut in its contour in the region of the housing, so that a slight recess 322 is produced in the inner contour, which transitions into the opening 320. In particular Figure 12 The direction of the contour lines can be seen in the top view.

[0105] The housing 318 is arranged opposite to each other. The fastening elements 370 are supported in the housing. These fastening elements are composed of bolts 371 and compression springs 372. Figure 10 In the exemplary embodiment shown, the bolt 371 is shown as a substantially cuboid element, which is connected to a compression spring 372 at its end 373 facing the outer ring 310 and has a locking device 374 at its other end.

[0106] Figure 10The illustrated compression spring 372 is a helical compression spring. One of its coiled ends is fastened to or within a bolt 371. The other free end 375 of the compression spring points toward the outer wall 317 of the outer ring. This free end is supported on the inner wall of the housing 318. Thus, the spring 372 constantly presses the bolt 371 toward the inner ring 330.

[0107] The screw 371 has a locking device 374 that is locked on the seat of the inner ring 330. The most important surfaces of the locking device 374 can be described as the inclined blocking surface 376 and the retaining surface 377 that point in the installation direction toward the bottom plate 313 of the outer ring 310.

[0108] If the inner ring 330 is not initially inserted, the spring-loaded locking element 370 is inserted into the housing 318 together with the compression spring 371, and the screw 371 projects in the tightening direction or in the direction of the interior of the outer ring 310. In this process, the spring 372 presses the screw against the impact edge 321 provided in the bottom 313 of the outer ring 310, against which the screw collides with its retaining surface 377 provided on the underside.

[0109] Like the inner rings 130 , 230 of the other embodiments, the inner ring 330 has a bottom side 331 and a top side 332 . The bottom side 331 is oriented relative to the base plate 313 of the outer ring 310 in the installation direction E and houses a circuit board 350 with its LEDs 351 and contact areas 352 .

[0110] In this embodiment 300, according to the invention, a housing for the contact element can also be placed in the inner ring 330 or in the outer ring 310. The housing is not shown in detail here.

[0111] The inner ring 330 also has an annular opening 333 into which the LED 351 is inserted with a precise fit. For an optimized radiation angle, the inner wall 334 also extends in a funnel shape.

[0112] The inner ring 330 has locking wedges 335 at two opposite locations. The outer wall 336 of the inner ring 330 is cut into a wedge shape; the wedge tips 337 point toward the outer ring 310. The outer wall 336 of the inner ring 330 forms mating walls 338, which delimit corresponding wedges on the left and right sides of the outer periphery and extend perpendicularly to the periphery line up to the wedge tips 337.

[0113] For assembly, the inner ring 330 is introduced vertically into the interior of the outer ring 310. In this process, the matching wall 338 serves as a guide element. Figure 13The cross-sectional view illustrates the interacting surfaces during installation. First, the lower wedge surface 339, pointing toward the underside 331 of the inner ring, strikes the locking bolt 371. This lower wedge surface serves as a retraction surface 339 and pushes the bolt 371 outward into the housing 318 against the spring force of the compression spring 372. Once the bolt 371 has been fully retracted, the bolt front end 378 slides over the wedge top 337. The inclined surface 340 of the bolt 371, pointing toward the bottom 313 of the outer ring 310—also referred to as the locking surface 340—now overlaps the upper stop surface 376 of the locking wedge 335 on the inner ring 330, pointing in the light emission direction L. The stop surface 376 and the locking surface 340 form an inclined surface pair.

[0114] The inclined surface pairing results in that the compressive force of the spring 372 acting radially in the tightening direction B is diverted into a retaining force acting in the installation direction E. The inner ring 330 is retained in the outer ring 310 . The circuit board 350 is retained between the inner ring 330 and the outer ring 310 .

[0115] For the sake of completeness, Figure 14 An embodiment 400 is shown which is almost identical to embodiment 300 in terms of the fastening principle. Figures 10 to 13 , except that the fastening element 470 does not have a helical compression spring but a leaf spring 472 .

[0116] There is an annular frame 405, which consists of an outer ring 410 and an inner ring 430. In addition, a circuit board 450 with LEDs 451 and contact areas 452 is also inserted into a cutout 414 in the bottom 413 of the outer ring 410. The circuit board is covered by the inner ring 430.

[0117] As in embodiment 300 , the inner wall 419 of the outer ring 410 again has an opening 420 through which a screw 471 fastened to a leaf spring 472 can slide in order to fasten the attachment element 400 with the LED printed circuit board 450 to the heat sink 500 .

[0118] Here, two housings 418 are located in the outer ring 410 and are arranged opposite each other. The housings 418 are used to accommodate the leaf springs 472 and are adapted to the contour of the leaf springs. The housings 418 are formed by recesses in the outer wall 417 of the outer ring 410, allowing the leaf springs 472 to be inserted in the installation direction.

[0119] The housing 418 forms grooves 423 on the circumference of the outer ring 410. The free retaining ends 475 of the leaf spring 472 are inserted into these grooves 423. The leaf spring 472 is inserted into the housing 418 under tension, and the retaining ends 475 are supported on the groove inner wall 424 pointing toward the outside of the outer ring 410.

[0120] The locking mechanism with the locking wedge 435 is identical to the locking mechanism of the embodiment 300. The description hereof also applies to the fastening member 470. Reference Signs List

[0121] 100 Attachment Elements 105 Circular Frame 110 First Ring / Outer Ring 111 lower side 112 upper side 113 bottom plate 114 incision 115 Insert Outline 116 scarf profile 117 recess 118 incision 119 Storage Basin 120 Drilling 130 Second Ring / Inner Ring 131 lower side 132 upper side 133 Annular opening 134 inner wall 135 Wall incision 136 outer wall 137 Keep Slope 138 Top of the slope 139 Surface 140 Vertical incision wall 150 circuit boards 151 LED 152 contact area 170 Spring Clip 171 Main body protrusion 172 Drilling opening 173 Keep your legs 174 contact surface 175 Spring Arc 176 Spring Arm 177 Retaining lug 178 Keep lug top 179 lower side 180 lateral inner surface 181 Support Section 190 Tightening bolts 191 Tighten the bolt head 192 lower side 200 Attachment Components 205 Circular Frame 210 First Ring Road / Outer Ring Road 211 lower side 212 upper side 213 bottom plate 214 incision 215 Insert Outline 216 scarf profile 217 Drill holes for screwing bolts 218 housing 219 contour extension 220 Opening facing inward 221 Recess for journal 230 Second Ring / Inner Ring 231 lower side 232 upper side 233 Annular opening 234 inner wall 235 retaining lugs 236 Retaining lug surface 250 circuit boards 251 LED 252 contact area 270 Fastening parts 271 journal 272 pivot plate 273 Boot Segment 274 pivot lugs 275 accommodating profile 276 Underside of pivot lug 290 Tightening bolts 291 Tighten the bolt head 292 lower side 300 Attachment Components 305 Circular Frame 310 First Ring Road / Outer Ring Road 311 lower side 312 upper side 313 bottom plate 314 incision 315 Insert Outline 316 scarf profile 317 Outer wall of the outer ring 318 housing 319 Inner wall of the outer ring 320 Opening facing inward 321 Collision Edge 322 recessed portion 330 Second Ring / Inner Ring 331 lower side 332 upper side 333 Annular opening 334 inner wall 335 Locking Wedge 336 Outer wall of inner ring 337 Wedge Top 338 Matching Wall 339 Indented surface 340 locking surface 350 circuit board 351 LED 352 contact area 370 Fastening parts 371 bolt 372 Compression Spring 373 connection parts 374 Locking device / locking surface 375 Free end of compression spring 376 blocking surface 377 Keep Surface 378 Bolt front 390 Tightening Bolts 391 Tighten the bolt head 392 lower side 400 Attachment Components 405 Circular Frame 410 First Ring / Outer Ring 411 lower side 412 upper side 413 bottom plate 414 incision 415 Insert Outline 416 scarf profile 417 Outer wall of the outer ring 418 housing 419 Inner wall of the outer ring 420 Opening facing inward 421 Collision Edge 422 recessed portion 423 slots 424 groove inner wall 430 Second Ring / Inner Ring 431 lower side 432 upper side 433 Annular opening 434 inner wall 435 Locking Wedge 436 Outer wall of inner ring 437 Wedge Top 438 Matching Wall 439 Indented surface 440 locking surface 450 circuit board 451 LED 452 contact area 470 Fastening parts 471 bolt 472 leaf spring 473 Connection 475 Free retaining end of leaf spring 476 blocking surface 477 Keep Surface 478 Bolt Front 490 Tightening bolts 491 Tighten the bolt head 492 lower side 500 cooling body A Layout Plan B Tightening direction S system axis E Loading direction L Light emission direction

Claims

1. An attachment element (200) for electrically attaching an LED lighting device, wherein: The LED lighting device has a circuit board (250), which is provided with a contact area (252) for supplying power to the LED (251). The attachment element has a substantially annular frame (205) which is provided for housing the circuit board (250) and mechanically holding the circuit board on the arrangement surface (A) of the cooling body (500), The attachment element has a contact assembly which is supported in the frame (205) and is used to supply power to the LED (251), wherein - the frame is divided into a first ring (210) and a second ring (230), The first ring (210) is provided as an outer ring for surrounding the printed circuit board (250) and holding the printed circuit board parallel to the arrangement surface (A) of the heat sink (500), - the second ring (230) is coaxially inserted as an inner ring in the outer ring (210), - at least partially covers the circuit board (250) and is configured to hold the circuit board (250) in a vertical direction relative to the arrangement surface (A) of the cooling body (500), It is characterized by: - the attachment element (200) has a fastening component (270), - the fastening member (270) is inserted into a housing (218) in the outer ring (210), - the inner ring (230) has a seat (235) for the fastening member (270), and The fastening element (270) engages in the support (235) substantially parallel to the arrangement surface (A) of the heat sink (500) and fixes the inner ring (230) in the outer ring (210), wherein: The fastening member (270) includes a pivot lug (274) that secures the inner ring (230) in the outer ring (210).

2. The attachment element (200) according to claim 1, characterized in that The attachment element (200) has two pivot lugs (274) which are arranged diagonally opposite each other and which secure the inner ring (230) in the outer ring (210).

3. The attachment element (200) according to claim 1 or 2, characterized in that The support is formed as a radial retaining protrusion (235) on the inner ring (230), and the pivot lug (274) covers the retaining protrusion to fix the inner ring (230).

4. The attachment element (200) according to any one of the preceding claims, characterized in that The outer ring (210) forms a housing (218) as a receptacle for the pivot lug (274), which is inserted into the housing by means of a journal (271) perpendicular to the arrangement surface (A) and can be pivoted from the housing (218) to the retaining lug (235) about the longitudinal axis of the housing.

5. The attachment element (200) according to any one of the preceding claims, characterized in that The pivot lug (274) has a receiving profile (275) for an unlocking tool.

6. The attachment element (200) according to any one of the preceding claims, characterized in that The outer ring (210) forms a respective contoured groove (219) in the region of the pivot lugs (274) for inserting an associated retaining projection (235).

7. An attachment element (100) for electrically attaching an LED lighting device, wherein: The LED lighting device has a circuit board (150), which is provided with a contact area (152) for supplying power to the LED (151). The attachment element has a substantially annular frame (105) which is provided for housing the circuit board (150) and mechanically holding the circuit board on the arrangement surface (A) of the cooling body (500), The attachment element has a contact assembly which is supported in the frame (105) and is used to supply power to the LED (151), wherein: - the frame is divided into a first ring (110) and a second ring (130), The first ring (110) is provided as an outer ring for surrounding the printed circuit board (150) and holding the printed circuit board parallel to the arrangement surface (A) of the heat sink (500), - the second ring (130) is coaxially inserted as an inner ring in the outer ring (110), - at least partially covers the circuit board (150) and is configured to hold the circuit board (150) in a vertical direction relative to the arrangement surface (A) of the cooling body (500), It is characterized in that - the attachment element (100) has a fastening component (170), - the fastening member (170) is inserted into a housing (119) in the outer ring (110), - the inner ring (130) has a seat (135) for the fastening member (170), and The fastening element (170) engages in the support (135) substantially parallel to the arrangement surface (A) of the heat sink (500) and fixes the inner ring (130) in the outer ring (110). The fastening component is a spring clamp (170) having a retaining leg (173), against which the outer wall (136) of the inner ring (130) abuts and which has two spring arms (176) extending from the retaining leg (173) in opposite directions in a circumferential direction, the spring arms surrounding the inner ring (130) and fixing the inner ring in the outer ring (110).

8. The attachment element (100) according to claim 7, characterized in that The attachment element (100) has two spring clips (170) which are arranged diagonally opposite each other and which secure the inner ring (130) in the outer ring (110).

9. Attachment element (100) according to claim 7 or 8, characterized in that Each spring arm (176) has a retaining lug (177) at its free end pointing toward the inner ring (130), the inner ring (130) being provided with a wall cutout (135), and each retaining lug (177) overlaps a fastening surface (137) in the wall cutout (135) and thus exerts an additional retaining force on the inner ring (130) acting in the direction of the arrangement surface (A).

10. The attachment element (100) according to claim 9, characterized in that The spring arms (176) each have a support section (181) at their free ends, which is perpendicular to the retaining leg (173). The supporting section (181) is placed flat on the bottom (113) of the outer ring (110), and the supporting section (181) of the spring clip (170) surrounds two corresponding wall cutouts (135) of the inner ring (130).

11. The attachment element (100) according to any one of claims 7 to 10, characterized in that The receptacle for the spring clip (170) is designed as a cup (119) in the bottom (113) of the outer ring (110).

12. The attachment element (100) according to any one of claims 7 to 11, characterized in that The spring clip (170) forms a main body protrusion (171) starting from the retaining leg (173), the surface of which serves as a support for a placement device (190), by means of which the attachment element (100) can be fastened to the heat sink (500), The main body protrusion (171) has an opening (172) which is consistent with the bore (120) in the outer ring (110) so as to allow the arrangement device (190) to pass through.

13. An attachment element (300, 400) for electrically connecting an LED lighting device, wherein: The LED lighting device has a circuit board (350, 450), wherein the circuit board is provided with a contact area (352, 452) for supplying power to the LED (351, 451). The attachment element has a substantially annular frame (305, 405) which is provided for housing the circuit board (350, 450) and mechanically holding the circuit board on the arrangement surface (A) of the cooling body (500), The attachment element has a contact assembly which is supported in the frame (305, 405) and is used to supply power to the LED (351, 451), wherein - the frame (305, 405) is divided into a first ring (310, 410) and a second ring (330, 430), The first ring (310, 410) is provided as an outer ring for surrounding the printed circuit board (350, 450) and holding the printed circuit board parallel to the arrangement surface (A) of the heat sink (500), - the second ring (330, 430) is coaxially inserted as an inner ring into the outer ring (310, 410), - at least partially covers the circuit board (350, 450) and is configured to hold the circuit board (350, 450) in a vertical direction relative to the arrangement surface (A) of the cooling body (500), It is characterized by: - the attachment element (300, 400) has a fastening component (370, 470), - the fastening member (370, 470) is inserted into the receiving portion (318, 418) of the outer ring (310, 410), - the inner ring (330, 430) has a seat (335, 435) for the fastening member (370, 470), and The fastening element (370, 470) engages in the support (335, 435) substantially parallel to the arrangement surface (A) of the heat sink (500) and fixes the inner ring (330, 430) in the outer ring (310, 410), wherein The fastening means (370, 470) comprise a spring-loaded locking element (370, 470) which secures the inner ring (330, 430) in the outer ring (310, 410).

14. The attachment element (300, 400) according to claim 13, characterized in that The attachment element (300, 400) has two spring-loaded locking elements (370, 470), which are arranged diagonally opposite each other and which secure the inner ring (330, 430) in the outer ring (310, 410).

15. Attachment element (300, 400) according to claim 13 or 14, characterized in that The outer ring (310, 410) forms a receptacle for the spring-supported locking element (370, 470) in the form of a housing (318, 418), which is open toward the inner ring (330, 430) and into which the locking element (370, 470) is inserted so as to be movable in the radial direction.

16. The attachment element (300, 400) according to any one of claims 13 to 15, characterized in that The locking element (370, 470) comprises a bolt (371, 471) and a compression spring (372, 472), wherein the compression spring (372, 472) is inserted into the housing (318, 418) and presses the bolt (371, 471) toward the inner ring (330, 430) in a radial direction.

17. The attachment element (300, 400) according to any one of claims 13 to 16, characterized in that The inner ring (330, 430) forms a locking wedge (335, 435) which interacts with the screw (371, 471), wherein the lower wedge surface (339, 439) serves as a retraction surface.

18. The attachment element (300, 400) according to claim 17, characterized in that The upper wedge surface (340, 440) of the locking wedge (335, 435) serves as a locking surface, which interacts with a blocking surface (376, 476) on the underside of the bolt (371, 471) and fixes the inner ring (330, 430) in the outer ring (310, 410).

19. The attachment element (300, 400) according to claim 18, characterized in that The locking surface (340, 440) and the blocking surface (376, 476) form an inclined surface pairing, which deflects the radially acting force of the compression spring (372, 472) in the direction of the arrangement surface (A).

20. The attachment element (300, 400) according to any one of claims 13 to 19, characterized in that The compression spring (372, 472) of the spring-supported locking element (370, 470) is a helical spring (372) or a leaf spring (472).

Images