Abstract
The invention relates to an electrical connection system in LED profile systems (60) and its components and the assembly of said components. The connection system comprises, in particular, an electrical connection element (40) for supplying electrical power to an LED strip (70) which is in the form of a flexprint strip (41). The connection element (40) has a supply connection length region (43) with exposed longitudinal conductor tracks (42), an LED connecting length region (44) with longitudinal conductor tracks (42) in the positions of the connections of the LED strip (70) and an adhesive area (45) on the rear side of the connection element (40). Here, the electrical connection element (40) can be folded over at a bending point (46) between the supply connection length region (43) and the LED connecting length region (44), so that they come to rest on opposite sides of the profile system (60). As an alternative or in addition, the electrical connection system also comprises an associated electrical connector (50) for supplying electrical power to the LED strip (70) which has a PCB (51) or a leadframe (51) encapsulated by injection moulding and having spring contacts (52) on a bottom side (54) and a cable outlet (67) with cable connections (53) on a top side (55), wherein a clip element (56) is formed for attachment to the profile system (60).
Claims
1. An electrical connection element (40) configured for electrical supply of an LED strip (70), which is fastened in a profile system (60), wherein the electrical connection element (40) is a flexprint strip (41), which has, a supply connection length region (43), which is configured with at least two exposed longitudinal conductor tracks (42), an LED connecting length region (44), which can be connected electrically with at least two longitudinal conductor tracks (42), whose positions correspond to connections of the LED strip (70), and with the LED strip (70), and an adhesive area (45) on the rear side of the connection element (40), wherein the electrical connection element (40) can be folded over at a bending point (46), which lies between the supply connection length region (43) and the LED connecting length region (44).
2. The electrical connection element (40) according to claim 1, wherein the flexprint strip (41) has a bending point marking (46) at the bending point.
3. The electrical connection element (40) according to claim 1, wherein the LED connecting length region (44) is provided with a measuring system/tape measure scale (48), starting at a bending point marking (46).
4. The electrical connection element (40) according to claim 3, wherein a reinforcing element (47) is applied to the flexprint strip (41) following the bending point marking (46), on the supply connection length region (43).
5. The electrical connection element (40) according to claim 1, wherein at one end of the supply connection length region (43) a stopper element (49) is applied to the flexprint strip (41), which provides a longitudinal stop at the end of the supply connection length region (43).
6. The electrical connection element (40) according to claim 1, wherein the electrical connection element (40) is configured to interact with an electrical connector (50) in such a manner that a snapped-on electrical connector (50) on the electrical connection element (40) can be moved along the profile direction.
7. The electrical connection element (40) according to claim 1, wherein the supply connection length region (43) or the LED connecting length region (44) has a length of the exposed longitudinal conductor tracks (42) in a range of 5 cm to 15 cm, wherein the supply connection length region (43) or the LED connecting length region (44) is longer than an electrical connector (50) to be connected to it, and/or the supply connection length region (43) or the LED connecting length region (44) has a length of the exposed longitudinal conductor tracks (42) in a range of 2 cm to 12 cm, and longer than a pitch section of the LED strip.
8. The electrical connection element (40) according to claim 1, wherein the flexprint strip (41) has at least the same width as the LED strip (70).
9. The electrical connection element (40) according to claim 1, wherein the longitudinal conductor tracks (42) in the supply connection length region (43) are configured as at least three symmetrically arranged longitudinal conductor tracks (42)).
10. The electrical connection element (40) according to claim 1, wherein the longitudinal conductor tracks (42) in the supply connection length region (43) are provided in a polarity-reversal-proof arrangement about a longitudinal central axis of the flexprint strip (41).
11. The electrical connection element (40) according to claim 1, wherein the electrical connection element (40) is configured to be contacted or soldered to a linear line (82) in such a way that it can be lengthened so that the linear line (82) provides a contact option for an electrical connector (50) at any point along the axis of the profile system (60).
12. An electrical connector (50) configured for the electrical supply of an LED strip (70) which is glued in a profile system (60), via an electrical connection element (40) according to claim 1, wherein the electrical connector (50) has, a PCB (51) or overmoulded leadframe (51) with at least two spring contacts (52) on an underside (54), a cable outlet (67) with at least two cable connections (53) on a top side (55), and at least one of: a holding element (56 configured to snap onto a profile system (60) on a profile rear side (61) facing away from the LED strip (70), and a holding element (56) configured to magnetically attach to a profile system (60) on a profile rear side (61) facing away from the LED strip.
13. The electrical connector (50) according to claim 12, wherein the spring contacts (52) are arranged and configured in a polarity-reversal-proof manner, with at least three spring contacts (52), arranged mirror-symmetrically about a central axis and electrically connected.
14. The electrical connector (50) according to claim 12, wherein the cable connections (53) are configured as one of spring-loaded terminals, insulation piercing terminals and/or soldering eyes on the PCB (51) or overmoulded leadframe.
15. The electrical connector (50) according to claim 12 comprising, a cable outlet (67) leading laterally or upwards for connection to a supply voltage.
16. Two electrical connectors according to claim 12, the two electrical connectors (50) connected to at least one cable (67), and configured to form an electrical connection between two electrical connection elements (40).
17. An electrical connector element (58, 59) with an overmoulded leadframe or a PCB (51) comprising: a first group of two spring contacts (52), on an underside (54), and a second group of two spring contacts (52), on the underside (54), which are electrically connected to the associated spring contacts of the first group, and a holding element (56) configured to snap onto a profile system (60) on a profile rear side (61) facing away from the LED strip (70), so that the first group contacts a first connection element (40) of a first LED strip and the second group contacts a second connection element (40) of a second LED strip (70) and electrically connects them to one another in an assembled state.
18. An electrical connection system (80) for an LED lighting profile (60) comprising: at least one electrical connection element (40), according to ene of claim 1, for attachment in the lighting profile (60), and at least one electrical connector (50) for the electrical connection element (40).
19. An LED lighting profile (60) having an extruded aluminium profile or plastic profile with at least one electrical connection system (80) according to claim 18.
20. An LED lighting system (81) comprising at least one LED strip (70), at least one preferably translucent cover (69) and, at least one LED lighting profile (81) according to claim 19.
21. (canceled)
22. A method for connecting an LED strip (70) to a supply voltage via an electrical connection element (40), according to claim 1, comprising: adhesively bonding an end region of the LED strip (70) to an LED connecting length region (44) of the connection element (40), soldering connection pads of the LED strip (70) to longitudinal conductor tracks (42) on the LED connecting length region (44), adhesively bonding a supply connection length region (43) of the connection element (40) onto the profile rear side (61) on a profile end (63) of a profile system (60), wherein a bending point marking (46) comes to rest on the profile end (63) of the profile system (60), bending the electrical connection element (40) around the profile end (63) of the profile system (60) so that the LED connecting length region (44) comes to rest on a profile front side (62), adhesively bonding the LED connecting length region (44) and the LED strip (70) to the profile front side (62), and plugging an electrical connector (50) on the profile rear side (61) to connect a supply voltage to the supply connection length region (43).
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0079] In the figures:
[0080] FIGS. 1a to 1b show an example of an embodiment of a connection system according to the invention for an LED lighting profile in different perspective views,
[0081] FIG. 2a shows a view of an embodiment of an electrical connection element according to the invention mounted on a profile,
[0082] FIG. 2b shows a view of an embodiment of an electrical connector according to the invention or connection element,
[0083] FIG. 2c shows a view of the previously shown electrical connector snapped onto the electrical connection element of FIG. 2a,
[0084] FIGS. 3a to 3f show views of an exemplary embodiment of an electrical connection element according to the invention,
[0085] FIGS. 4a to 4f show views of an exemplary embodiment of an electrical connector according to the invention,
[0086] FIGS. 5a to 5d show views of an electrical connection system according to the invention for LED lighting profiles with an electrical connector and electrical connection element on an LED lighting profile or LED light profile,
[0087] FIGS. 6a to 6c show an example of a connection or assembly of an LED lighting profile according to the invention,
[0088] FIGS. 7a to 7e show examples of embodiments of angled and straight connections of several LED lighting profiles according to the invention with detailed views,
[0089] FIGS. 8a to 8b show an example of a further embodiment of straight connections of several LED lighting profiles according to the invention,
[0090] FIGS. 9a to 9c show an example of a connection or assembly according to the invention of several connected LED lighting profiles,
[0091] FIGS. 10a to 10e show an example of a further embodiment of electrical connectors with a side cable outlet,
[0092] FIGS. 11a to 11c show an example of a connection according to the invention or an installation of an LED lighting profile with a side cable outlet,
[0093] FIGS. 12a to 12d show an example of a connection according to the invention or an assembly of an LED lighting profile.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0094] FIG. 1a shows components according to the invention of a connection system for LED lighting systems 81 for emitting light via a light cover 69, seen from the profile rear side or connection side 61. The connection system is configured specifically for LED lighting profiles 60, for example as an aluminium profile with an H-shaped cross-section, which can be connected to an end cap or terminating cap 64 or with another profile (see e.g. FIG. 8a) on the front side. The lighting system 81 is supplied with electricity via cable 67, preferably but not necessarily with a safety extra-low voltage (SELV), for example of 48 V, 24 V, 12 V or 5 V. This cable 67 is connected electrically to an electrical connector 50 according to the invention as a type of plug element, which is configured to be attachable to the profile 60 via clip elements 56, preferably in a detachable form. Via this electrical connector 50, the current is conducted from the cable 67 to an electrical connection element 40 according to the invention, specifically to its supply connection length region 43. The electrical connector 50 is preferably displaceable in the assembled state along the profile axis on the electrical connection element 40, wherein a stop or stopper element 49 can be provided, which prevents displacement beyond the end of the connection element 40. In order to ensure that, when installing an end cap 64 or a professional connecting element, the connection element 40 is not damaged or short-circuited (e.g. by a screw or the like placed thereon), in this embodiment at the end of the profile a reinforcing element 47 is provided on the connection element 40.
[0095] FIG. 1b shows the same components according to the invention in a connection system for LED lighting systems 81 as before, but seen from the profile front side or light side 62. In addition to the previously described elements 50, 56, 60, 64, 67 and 69, the LED connecting length region 44 of the electrical connector 50 according to the invention is shown here. An LED band or an LED strip 70 attached, in particular glued, in the profile 60 is electrically connected to this, specifically via the LED connection pads 74. Several LEDs 71 are mounted on the LED strip 70, which emit their light through the light cover or the light screen 69. The LED strip 70 is configured to be separable in length at provided LED strip separation points 75, at which it can be cut in discrete length steps to a length that matches the profile 60.
[0096] FIG. 2a shows an LED lighting system equipped according to the invention in a top view of the connection side 61 of the profile 60. On this side of the profile 60, the supply connection length region 43 of the electrical connection element 40 is attached, preferably adhesively bonded.
[0097] Optionally protected by the reinforcing element 47, an end cap 64 is attached to the profile end, for example plugged on or fixed with a screw (not shown here). The supply connection length region 43 has three longitudinal conductor tracks 42a, 42b and 42c, which are open or blank and can be electrically contacted from the visible side. In the example shown, the two conductor tracks 42a and 42c form a common terminal for supplying the LED strip 70, and the conductor track 42b forms a second terminal. Since these generally have to carry the same current, their cross-sectional areas can be the same as shown, but their width can be differentwith the same thickness. The conductor tracks are preferably located symmetrically around the profile longitudinal axis.
[0098] FIG. 2b shows a perspective view of an electrical connector 50 according to the invention, which is designed to contact the supply connection length region 43 shown previously. With this a cable 67 can be contacted via spring contacts 52 to the conductor tracks 42a, 42b, 42c according to FIG. 2a. This embodiment of the electrical connector 50 is formed with a printed circuit board (PCB) 51 and a plastic housing as a connection housing. The PCB carries the spring contacts 52 and is fixed in the plastic housing, e.g. positively or non-positively, for example clipped in, snapped in, glued in or cast in. In an alternative embodiment, the electrical connector can also be configured as an overmoulded leadframe or as an MID (moulded interconnect device) or spatial circuit carrier or as a plastic-overmoulded assembly with an overmoulded lead frame. The plastic housing is primarily configured to be snapped into the profile 60 in a releasable manner via the clip or snap elements 56, or optionally also by magnets, so that a contact is made between the spring contacts 52 and the conductor tracks 42a, 42b, 42c.
[0099] FIG. 2c shows an example in which the subject of FIG. 2a and the subject of FIG. 2b are plugged together so that the electrical connector 50 contacts the electrical connection element 40. The designated elements are already described in the previous figures.
[0100] FIG. 3a shows an embodiment of an electrical connection element 40 in unmounted form, for example laid out flat as after its production, in detail. On the left is its supply connection length region 43 and on the right is its LED connecting length region 44. In between there is a bending point 46 or a bending point marking 46. The electrical connection element 40 is preferably configured with a flexprint 41, i.e. a flexible circuit board or flex circuit board, specifically as a flexprint strip. Optionally, it can also be configured as a classic, rigid circuit board or MID, which is already brought into the shape shown in FIG. 3b during production and can be plugged onto the profile end. The conductor tracks 42 on both sides, which can be contacted openly as seen from the view side, are each connected to one another, preferably in such a way that a symmetrical connection always results in the same polarity on the LED connecting length region 44, regardless of the insertion direction on the supply connection length region 43. The optional reinforcing element 47 is also shown.
[0101] FIG. 3b shows a mounted electrical connection element 40 seen previously in a view from the supply connection side 43, i.e. bent by 180 degrees at the bending point marking 46. The components shown have already been described.
[0102] FIG. 3c shows a mounted electrical connection element 40 from previously in a longitudinal sectional view through the profile system 60. The connection element 40 is bent at the bending point marking 46 by 180 degrees around or on the end face of the profile system, so that the supply connection length region 43 comes to rest on one side and the LED connection length area 44 comes to rest on the other side of the inner surface of the profile system 60. Preferably the electrical connection element 40 is placed at the bending point marking 46 at the end of the profile system 60, and the two sides are adhesively bonded in the profile system. For this purpose, the electrical connection element 40 is preferably provided with an adhesive surface or adhesive layer, so that only one protective strip has to be removed beforehand. Alternatively double-sided adhesive tape or adhesive can also be used, or a non-adhesive connection can also be made, for example using retaining clips or by clipping or pushing into the (appropriately shaped) profile system 60.
[0103] FIG. 3d shows a mounted electrical connection element 40 from previously in a view from the LED connection side. Since the profile system 60 is hidden, the adhesive surface 45 on the rear side of the supply connection length region 43 can also be seen here, which in this embodiment is longer than the LED connection length region 44. In addition to the conductor tracks 42, which are arranged and configured for connection to an LED strip, a measuring system 48 is also shown here in the form of a tape measure scale, which begins at the bending point 46 and at which a distance from the end of the profile can be read. This means that, as shown in the other figures, an LED strip 70 can be centred or positioned in a defined manner along the length of the profile system 60. For example, it can be advantageous to electrically and/or mechanically connect the LED strip 70 to the electrical connection element 40 before it is mounted; for example, since soldering (or positioning) inside a very narrow profile system can be difficult. According to the invention, a difference in length between the profile system and the LED strip 70 can be determined and the LED strip 70 can then be adhesively bonded to the electrical connection element 40 using the measuring system 48 at a distance from the profile end, which corresponds to half the difference in length, and then soldered. If the electrical connection element 40 with the connected LED strip is then placed at the bending point marking 46 at the end of the profile system and glued on both sides, the LED strip is exactly in the middle of the profile, which results in good, uniform illumination.
[0104] FIG. 3e again shows a perspective view of the electrical connection element 40, in mounted form, without the profile system 60, as already described above.
[0105] FIG. 3f shows a detailed view of the bend or bending point 46 from FIG. 3c or FIG. 3e, with the inner adhesive surfaces 45 (which can also run continuously over the bend region) and the reinforcing element 47, which can be attached in a fixed manner in the area of the bending point 46 on the connecting element 40 and optionally can also serve as bending point marking 46. It can be seen that there does not necessarily have to be a hard, angular bend around the profile wall at the bending point 46, but that a bending radius can also be formed in accordance with the mechanical flexibility of the flexprint of the connection element 40. Alternatively, the reinforcing element 47 can also be pushed or clipped on after the connecting element 40 has been attached to the profile end, e.g. at the end of the profile as a U-shaped plastic clip over both sides of the profile wall or the connection element 40, which insulates and/or mechanically protects the connection element 40 in this area.
[0106] FIG. 4a shows a detailed view of an embodiment of an electrical connector 50 according to the invention from the top side 55 (or cable side or housing side). This has a cable outlet 67 or a connection for a cable 67, spring contacts 52 on its underside or contact side and a connector housing with clip elements 56.
[0107] FIG. 4b shows a view from the side of the cable 67, in which the symmetrical arrangement of the spring contacts 52 is also visible.
[0108] FIG. 4c shows the electrical connector 50 from the underside 54 (as the contact side or connection strip side). In this embodiment, the spring contacts 52 and their electrical connection to the cable 67 are implemented via a PCB 51.
[0109] FIG. 4d shows an example of an embodiment of such a PCB 51 with the spring contacts 52 in a view from above. These are implemented several times per electrical terminal-twice in the example shownin order to ensure secure contact and/or to provide sufficient contact for the current intensity to be transmitted. The arrangement of the spring contacts 52 here is symmetrical about the (longer) central axis of the PCB 51, wherein the middle spring contacts 52 carry a first terminal of the supply voltage and the second terminal rests on the outer spring contacts 52 on both sides. If the connection element 50 is thus attached rotated by 180 degrees, the same polarity (polarity reversal protection) is obtained.
[0110] FIGS. 4e and 4f show a side view of the PCB 51 and a view from below. Here the cable connections 53 for the cable 67 (FIG. 4a-c) are shown. In particular, these can be implemented as solder contacts/pads 53a and/or as spring-loaded terminals 53 or insulation-piercing terminals or as crimp connections, screw terminals, etc.
[0111] FIG. 5a shows a similar view from the view of the connection side 61, like FIG. 2cto which reference is made for detailsin which a connector 50 according to the invention and a connection element 40 according to the invention on an LED lighting profile 60 interact for connection with a cable 67. The longitudinal axis of the profile system 60 is shown, which serves as a plane of intersection for the following view.
[0112] FIG. 5b shows a sectional view along the aforesaid axis through the profile system 60, on which the LED strip 70 with the LEDs 71 is adhesively bonded at the bottom (on the light side 62) via its LED adhesive side 73, which is electrically connected to the connection element 40. The connection element 40 leads the connections upwards (to the connection or assembly side 61), where they are connected to a cable 67 by means of the connector 50, which can be detachably attached in the profile. The latter is accomplished via spring contacts 52 pressed onto the connecting element, which are arranged on a PCB 51, on which there are clamping and/or solder connections 53 for the cable 67.
[0113] FIG. 5c shows a view of the light side 62 with the LED strip 70 with the LEDs 71 on the LED flexprint 72 and its connection pads 74 for supplying and/or controlling the LEDs. This is electrically connected to the connection element 40 according to the invention, e.g. by soldering the connection pads 74 to the associated longitudinal conductor tracks 42, and can also be mechanically connected to this, e.g. by adhesively bonding the LED strip 70 onto the connection element 40. The LED strip 70 can also have an LED control circuit 76 and/or an LED control bus 77, wherein the latter is preferably also routed via connection elements 40 and connectors 50 according to the invention, e.g. in the form of additional terminals or connections, which are preferably also protected against polarity reversal.
[0114] FIG. 5d shows a detailed view of the profile end 63, i.e. the end face of the profile 60, on which an end cap 64 is attached. In this embodiment, a recess 65 is provided in the end cap 64 to accommodate the bend 46 of the connection element 40 around the profile end 63. Alternatively, the profile end 63 could naturally also be shortened accordingly, or the end cap 64 could be constructively configured in a different way in order to provide a practical and visually appealing end to the profile 60 with the curved connection element 40.
[0115] FIG. 6a shows an example of an advantageous mounting of an LED lighting profile 60 equipped according to the invention on a ceiling 83. In addition to attaching the mounting material 84 to a cable 67 that has already been pulled in or is to be pulled in, an electrical connector 50 according to the invention is mounted, preferably without tools, e.g. with spring-loaded or insulation-piercing terminals, into which only the possibly stripped cable ends need to be inserted.
[0116] FIG. 6b shows how, in the case of the LED lighting profile 60 with an electrical connection element 40 according to the invention pre-assembled on site or at the manufacturer, the electrical connector 50 is clipped into the profile system 60 from behind.
[0117] FIG. 6c shows how the LED lighting profile 60 is then attached to the ceiling 83 by means of the mounting material 84, preferably also by clipping, optionally into the same profile of the LED lighting profile 60 into which the electrical connection element 40 is also clipped. Since the electrical connector 50 can be displaced in the axial direction on the electrical connection element 40, no or at least significantly less tension occurs in the cable 67, or the exact outlet position of the cable in the ceiling 83 is much less critical. Axial displacement, adjustment and centring of the mounted profile on the ceiling is also easier.
[0118] With the present invention, a simplified splitting up of profiles is also possible. This means, for example, that long profiles no longer have to be transported and assembled, which makes handling and assembly easier. The profiles can also be easily connected electrically, at any freely selectable angles.
[0119] FIG. 7a shows an example of an embodiment in which several profile elements 60a, 60b, 60c are electrically connected to one another. On the left in the figure with a straight profile connection 66a with a rigid connection element 59 between 60a and 60b. On the right with an angle profile connection 66b with a flexible connection element 58 between 60b and 60c. In an embodiment not explicitly shown here, a straight profile connection 66a can also be produced with the flexible connection element 58. Especially in the case of longer profiles, instead of or in addition to a connection, feeds according to the invention can also be implemented with connectors 50 at several arbitrary locations which prove to be advantageous.
[0120] FIG. 7b shows a detailed view of the corner connection 66b using the example of a right angle. According to the invention, in order to realize other angles, the profiles simply have to be cut off at a different angle; further modifications are not absolutely necessary. Shown here is an embodiment in which a linear line 82 is attached on the connection side in the profile system 60, which is electrically connected to the electrical connection element 50 at least on one, preferably on both sides. In an alternative embodiment according to the invention, the supply connection length region 43 of the connection element 40 can also be longer, e.g. as long as the maximum individual profile length. Preferably, however, an extension of the normal length connection element 40 described above is only carried out if necessary through a separate, e.g. linear line 82 in the form of an endless strip in the present case in order to have more flexibility to use the material more efficiently. Alternatively, a normal-length connection element 40 can also be used, wherein then in the corners the crossbar in the profile 60 is then cut off at right angles to the profile 60 in order to bend the connecting element on or around the resulting edge.
[0121] Shown here, the two linear lines 82 of the respective profiles 60b and 60c are contacted with two electrical connectors 50 connected to one another via a cable piece 67, and an electrical connection is thus made between them-even around a corner. The two connectors with the cable piece can be provided pre-assembled as a flexible connection element 58, or can be manufactured individually from individual connectors 50 and a piece of cable 67.
[0122] FIG. 7c shows an example of an embodiment of a straight joint 66a in detail. Instead of an equally possible flexible connection element 58, a rigid connection element 59 is shown here for producing the straight profile connection 66a. This rigid connection element 59 can be contacted on respective connection elements 40 on both ends of the profiles 60a and 60b. However, another embodiment is shown here, in which contact is made on respective linear lines 82. The linear line 82 can preferably be configured as a stick-on flexible conductor with at least two open longitudinal conductor tracks, which correspond in particular to the conductor track geometry of the connecting connection length region 43 or the LED connecting length region 44.
[0123] These linear lines 82, with which the connection elements 40 according to the invention can be connected or extended, can have other positive effects. For example, in the case of a single-colour LED (2-pole), the LED tapes or strips are preferably connected with 0.75 mm-cable. The cross-section should be as large as possible in order to minimize the voltage loss across the line. This is in contrast to the LEDs/solder pads on the LED strips which are becoming increasingly smaller. If the LEDs are multi-coloured, e.g. RGB (4-pole) or RGBW (5-pole), it is almost impossible to use 0.75 mm.sup.2. Therefore, the cross-section must be reduced in this case. Cables with a cross-section of 1.0 mm-would be optimal up to cable lengths of 10 m. As shown in the figures, this can be solved according to the invention by also using a flat band in the form of the linear line 82, which is simply connected to the connection element 40, e.g. soldered or via a plug connection. In a special embodiment of the invention a linear line 82 attached to the connection side 61 of the profile 60 can also be bent 46 directly as a connection element 40 at the profile end 63 to the light side 62, and/or connected to the LED strip, preferably on both sides of the profile 60. Thus, a feed can be made at any point(s) on the connection side 61 with a connector 50, and at the same time the conductor cross-section is also increased with the linear line 82, in particular since this is now also routed parallel to the LED strip on the rear side, in which larger conductor cross-sections can optionally be achieved.
[0124] FIG. 7d and FIG. 7e show a rigid connecting element 59 again in detail in plan and elevation. The spring contacts 52 are connected on a line on the PCB 51. Optionally, a cable connection 53 can also be present on the rigid connection element 59 in order to be able to implement a feed with this.
[0125] FIG. 8a and the detailed view FIG. 8b again show an example with a straight profile joint 66a between the profiles 60a and 60b, which is realized with a flexible connection element 58as already described for FIGS. 7a, 7b, 7c. The supply from the cable 67 is produced via a connection element 40 via the straight cable connection element 57a or the connector 50. Further contact between the profiles 60a, 60b is also made via further connection elements 40 at the profile end in each case. Optionally, linear lines 82 can also again be used, which extend continuously over the respective profile rear side.
[0126] FIG. 9a shows an example of an advantageous assembly of an LED lighting profile 60 equipped according to the invention, consisting of several partial profiles 60a, 60b on a ceiling 83. In addition to attaching the mounting material 84 to a cable 67 that has already been pulled in or is to be pulled in, an electrical connector 50 according to the invention is mounted, e.g. with spring-loaded or insulation-piercing terminals.
[0127] FIG. 9b shows how, in the case of the LED lighting profile 60a, the electrical connector 50 is clipped into the profile system 60 from behind on the electrical connection element 40 in the profile 60a. Furthermore, a straight profile connection 66a with a flexible connection element 58 (alternatively also with a rigid connection element 59) is prepared by clipping in on one side.
[0128] FIG. 9c shows how the LED lighting profile 60a is then fastened to the ceiling 83 by means of the mounting material 84, preferably also by clipping. The second LED lighting profile 60b is then connected to the flexible connection element 58 and also fastened to the ceiling 83. Here too, the axial or longitudinal displaceability of the connectors or connection elements 58 is advantageous to make assembly easier since one has more clearance and can straighten the connecting cable between the profiles at the end.
[0129] FIG. 10a shows, instead of the previously shown straight cable connection element 57a, an embodiment with an angled cable connection element 57b as connector 50. This can be used to form a lateral cable outlet 67 from the profile system 60. In this case, an electrical connection element 40 and/or a flat conductor 82 is used, which is contacted with a connector 50, which is configured here as an angled cable connection element 57b. In an analogous manner, further forms of connectors 50 according to the invention can also be provided in order to meet special connection configurations.
[0130] In this specific example, the flat conductor 82 is connected to the connection element 40 behind the stopper element 49, e.g. soldered or clamped, or an embodiment of a previously described, straight profile connector 66a can also be used to connect connection element 40 and flat conductor 82 (if necessary without or with the stopper element 49 removed).
[0131] FIG. 10b again shows a detailed view of the side cable outlet 67 from previously, in which the construction site cable 67 is connected via the cable connector 53 to the PCB 51b of the angled cable connection element 57b, which PCB 51b can preferably be configured as a preformed circuit board or preferably also preformed flexprint or as MID, etc.
[0132] Due to the polarity reversal protection of this embodiment according to the invention, the connection side can be changed by rotating the angled cable connection by 180?. This is particularly important and advantageous for profiles with mitre cuts (since these are then no longer symmetrical). This results in a minimization of errors and a simplification for the customer, since sketches as to how this has to be produced on the construction site are no longer necessary.
[0133] FIG. 10c, FIG. 10d and FIG. 10e show different views of the angled cable connection element 57b from previously, with the clip-in connector housing 56 removed. This exemplary configuration is shaped, i.e. the PCB 51b is specially shaped in such a way that an assembly with a side cable outlet can be produced without adjustment to the profile 60. In contrast to the previous connector 50, here also spring contacts 52 and the cable connection 53 in the form of a spring-loaded or insulation-piercing terminal, solder pads, or the like are arranged on the same side of the PCB 51b.
[0134] FIG. 11a shows an example of an advantageous installation of an LED lighting profile 60 equipped according to the invention in a corner on the ceiling 83. In addition to attaching the mounting material 84 to the cable 67, an angled cable connection element 57b according to the invention is mounted.
[0135] FIG. 11b shows how the electrical connector 50 of the angled cable connection element 57b was brought into position in order to be clipped from behind into the LED lighting profile 60 with electrical connection element 40 and linear lines 82 by pressing the profile 60 onto these.
[0136] FIG. 11c shows how the LED lighting profile 60 is finally fastened flush in the corner 83 with a hidden cable outlet, without any recesses in the profile 60 being necessary. When using the linear lines 82, the feed point can also be moved as desired over the profile length.
[0137] FIG. 12a and the detailed section marked therein in FIG. 121b as well as the similar views of FIG. 12c and FIG. 12d show a reduced embodiment according to the invention with an electrical connection element 40 which is fitted directly with a cable connection 53 for connection of a cable 67 in which a cable 67 can optionally be connected, i.e. without an explicit electrical connector element 50.
[0138] Thus, only such a simpler electrical connection element 40 needs to be provided, in which some of the aforementioned advantages of the clip-in connector 50 are not provided but which is sufficient for simple applications and has fewer individual parts. The other designated elements can be designed as described previously.
[0139] The structure shown here also solves the problem of using cables with relatively large cross-sections (e.g. B. 1 mm-Cu cross-section), which therefore cannot be easily soldered directly to the LED strip.
[0140] According to the invention, the embodiments shown, especially of at least the electrical connection element 40 and/or electrical connector 50, can be provided specifically as an electrical LED connection system 80 or connection set, modular system, but can also be provided individually, or together with the profile system 60 or as an entire LED lighting profile 81.
REFERENCE LIST
[0141] 40 Electrical connection element [0142] 41 Flexible circuit board, flex circuit board, flexprint strips [0143] 42 (a-c) Conductor track, longitudinal conductor track [0144] 43 Supply connection length region, connecting connection length region [0145] 44 LED connecting length region [0146] 45 Adhesive surface [0147] 46 Bending point marking, bending point, bend [0148] 47 Reinforcing element, reinforcing plate [0149] 48 Measuring system/tape measure scale [0150] 49 Stopper element [0151] 50 Electrical connector, plug element [0152] 51 PCB, printed circuit board, overmoulded leadframe, MID [0153] 52 Spring contact, [0154] 53, 53a Cable connection, spring-loaded clamp, solder contact/pad [0155] 54 Underside, connection strip side [0156] 55 Top side, cable side [0157] 56 Clip element, connector housing, connector retaining clip, clip [0158] 57a Cable connection element straight [0159] 57b Cable connection element angled [0160] 58 Flexible connection element, cable connector element [0161] 59 Rigid connection element, fixed connector element [0162] 60 (a, b, c) Profile system, LED lighting profile [0163] 61 Connection side, profile rear sides [0164] 62 Light side, profile front side [0165] 63 Profile end, front side, [0166] 64 End cap [0167] 65 End cap recess [0168] 66a Straight profile connection, joint [0169] 66b Angle-profile connection, corner connection, mitre joint [0170] 67 Cable outlet, cable [0171] 68a Profile side wall, side wall of the profile [0172] 68b Profile web, crossbar, H-bridge of the profile, together with 68a this forms the profile that is closed with the light cover. [0173] 69 Light cover, cover, light shade [0174] 70 LED strip, LED tape [0175] 71 LED [0176] 72 LED flexprint, LED flex printed circuit board [0177] 73 LED adhesive side [0178] 74 LED strip connection pads [0179] 75 LED strip separation point [0180] 76 LED control circuit [0181] 77 LED control bus [0182] 80 Electrical LED connection system, connection set [0183] 81 LED lighting system, LED light rail system, [0184] 82 Linear line, adhesive flexprint line [0185] 83 Installation location, ceiling, corner of the room, [0186] 84 Mounting material, mounting brackets
