DE102019106358A1 - PCB mounting - Google Patents

Abstract

The invention relates to an LED light module (10) for a headlight (60) for a motor vehicle (70) having: (a) at least one circuit board (30) which has at least one LED (32) for emitting light, the circuit board (30) has a longitudinal extension (L) and a width extension (B) running perpendicular to the longitudinal extension (L), (b) a reflector (20) on which the at least one printed circuit board (30) is arranged, around that of the at least reflecting an LED (32) emitted light in the direction of a translucent headlight cover lens (62) of the headlight (60), (c) a fastening device (40) which fastens the circuit board (30) to the reflector (20), wherein (d) the printed circuit board (30) is fastened by the fastening device (40) in a desired position on the reflector (20), the printed circuit board (30) (i) on at least one first contact surface (24) pointing in an X direction Reflector (20) is applied, the X direction in a The plane of the printed circuit board (30) runs transversely to the longitudinal extension (L) and / or transversely to the widthwise extension (B), (ii) rests against at least one second contact surface (25) of the reflector (20) pointing in a Y direction, wherein the Y-direction in a plane of the circuit board (30) runs transversely to the longitudinal extension (L) and / or transversely to the widthwise extension (B) and transversely to the X-direction, and (iii) at least one in a Z-direction showing third contact surface (26) of the reflector (20), the Z-direction extending out of the plane of the circuit board (30) and in the direction of a vertical extension (H) of the circuit board (30).

Description

The invention relates to an LED light module for a headlight for a motor vehicle with: (a) at least one printed circuit board which has at least one LED for emitting light, the printed circuit board having a longitudinal extension and a width extending perpendicular to the longitudinal extension, (b) a reflector on which the at least one circuit board is arranged in order to reflect the light emitted by the at least one LED in the direction of a translucent headlight cover lens of the headlight, and (c) a fastening device which fastens the circuit board to the reflector. The invention also relates to a method for producing an LED light module for a headlight for a motor vehicle, a headlight for a motor vehicle and a motor vehicle.

The US 2018/0112844 A1 describes an LED light module in a vehicle light as mentioned at the beginning. A light source arrangement with a printed circuit board and a light screen is to be positioned therein relative to a reflector. For this purpose, positioning openings are formed on the circuit board and on the reflector, which serve as reference points for positioning. Positioning pins are pushed through the positioning openings of the reflector and the circuit board in order to position the light source arrangement relative to the reflector. Fastening elements such as screws or bolts extend through fasteners on the circuit board and the bracket to secure the circuit board to the bracket.

The disadvantage of the known prior art is that positioning openings with the positioning pins have high tolerances with regard to the positional accuracy of the circuit board on the reflector, so that the circuit board could be relatively easily misaligned during assembly, which results in an undesirable light distribution of the LEDs arranged on the circuit board would have. In addition, when the circuit board is fastened to the holder by means of the fastening elements used in the prior art, a torque or a high force is transmitted to the circuit board, which further rejects the required positional accuracy.

It is therefore an object of the invention to reduce the disadvantages of the prior art, in particular to increase the positional accuracy of the printed circuit board relative to the reflector when the printed circuit board is fastened to the reflector using inexpensive and simple means.

The above object is achieved by the subjects of the patent claims, in particular by an LED light module for a headlight for a motor vehicle according to claim 1, a method for producing an LED light module for a headlight for a motor vehicle according to claim 13, a headlight for a vehicle according to claim 13 Claim 14 and a vehicle according to claim 15, solved. Further advantages and details of the invention emerge from the subclaims, the description and the drawings. Features and details that are disclosed in connection with the LED light module according to the invention naturally also apply in connection with the method according to the invention, the headlight according to the invention and the vehicle according to the invention and vice versa, so that reference is always made to the individual aspects of the invention with respect to the disclosure will or can be.

According to a first aspect, the object is achieved by an LED light module according to the invention for a headlight for a motor vehicle with: (a) at least one circuit board which has at least one LED for emitting light, the circuit board having a longitudinal extension and a perpendicular to the longitudinal extension having extending width extension, (b) a reflector on which the at least one circuit board is arranged in order to reflect the light emitted by the at least one LED in the direction of a translucent headlight cover lens of the headlight, (c) a fastening device that holds the circuit board attached to the reflector, wherein (d) the circuit board is fastened by the fastening device in a desired position on the reflector, wherein the circuit board (i) rests on at least one first contact surface of the reflector pointing in an X-direction, the X-direction in a plane of the circuit board transverse to the longitudinal extension and / or runs transversely to the widthwise extent, (ii) rests against at least one second contact surface of the reflector pointing in a Y-direction, the Y-direction in a plane of the circuit board transversely to the longitudinal extent and / or transversely to the widthwise extent and transversely to the X. Direction runs, and (iii) rests against at least one third contact surface of the reflector pointing in a Z direction, the Z direction extending out of the plane of the circuit board and in the direction of a vertical extension of the circuit board.

According to the invention, by placing the circuit board on the reflector in different directions, the positional accuracy of the circuit board on the reflector is significantly increased because contact surfaces of the reflector are used to align the circuit board on the reflector. In addition, the reflector has very low manufacturing tolerances, so that the contact surfaces formed in particular from tool halves of light surfaces of the reflector with regard to their arrangement and alignment have very low tolerances. Since the reflector itself is used for alignment, this represents a particularly simple and inexpensive way of increasing the positional accuracy of the circuit board relative to the reflector in order to ensure that a desired light distribution of the LED is achieved.

Of course, in the sense of the invention, when an element, for example the circuit board, is in contact with another element, for example a contact surface on a reflector, this means that the contacting element exerts a force on the other element, so that it can also be referred to as pressing. The force is not visible in this case, but a distinction should be made when it is in contact with a pure juxtaposition not according to the invention, in which at least one element does not exert any force on the element lying next to it. The force for applying or also pressing one element against the other can be achieved according to the invention by gravity and / or by the elements proposed herein, for example fastening means of the fastening device.

The X direction, Y direction and Z direction can each be formed by the perpendiculars of the contact surfaces. This means that the perpendicular can be understood as an imaginary line that is perpendicular to the respective contact surface. The height extension is in particular an extension of the printed circuit board according to its strength or thickness. Furthermore, the vertical extension runs in particular perpendicular to the longitudinal extension and perpendicular to the widthwise extension. The plane of the circuit board is in particular the plane which runs through a surface of the circuit board, in particular a lower surface which is opposite the reflector.

The construction of the LED light module can also be described using a structure constructed from bottom to top. The reference direction below can point to a floor below a vehicle according to the invention with a headlight according to the invention, which has an LED light module according to the invention, and the reference direction above can point to a roof of the vehicle according to the invention. In such a structure, the circuit board can be arranged on the reflector and the fastening device can be arranged above or on the circuit board.

The invention encompasses the fact that the circuit board of the LED light module can have at least two LEDs. Furthermore, at least two circuit boards can be fastened to a reflector, in particular by the same fastening device, and in particular can be spaced from one another.

According to a preferred further development of the invention, it can be provided in an LED light module that the circuit board (i) rests against at least two, preferably exactly two, first contact surfaces of the reflector pointing in the X direction and spatially separated from one another and / or (ii) at least two, preferably exactly two, spatially separated second contact surfaces of the reflector pointing in the Y direction,
and / or the printed circuit board rests in the Z direction on at least two, preferably at least three, third contact surfaces of the reflector that point in the Z direction and are spatially separated from one another. Spatially separated from one another means that there is a straight line distance that can be formed between the contact surfaces, the smallest determinable air line distance in particular being able to correspond to at least the shortest or the longest side of one of the contact surfaces or at least double or triple the shortest or the longest side of the contact surface. As a result, the arrangement of the circuit board on the reflector can be clearly defined and the stability of the arrangement can also be improved.

According to a preferred further development of the invention, it can be provided for an LED light module that (i) between the X direction and the longitudinal extension an angle in the range from 15 ° to 75 °, in particular in the range from 30 ° to 60 ° and also in particular in the range from 40 ° to 50 °, (ii) an angle in the range from 15 ° to 75 °, in particular in the range from 30 ° to 60 ° and also in particular in the range from 40 ° to 50 ° exists, and / or (iii) between the X-direction and the Y-direction there is an angle in the range from 30 ° to 90 °, in particular in the range from 60 ° to 90 ° and furthermore in particular in the range from 75 ° to 90 °. The resulting pressure directions relative to the extension directions of the circuit board can further improve the tolerances in the arrangement of the circuit board on the reflector.

According to a preferred further development of the invention, it can be provided in an LED light module that (i) the at least one first contact surface is arranged on at least one first elevation and / or on at least one second elevation of the reflector, (ii) the at least one second contact surface is arranged on the at least one first elevation and / or on the at least one second elevation of the reflector, and / or (iii) the at least one third contact surface is arranged on at least one third elevation of the reflector, the at least first elevation, the at least second Elevation and / or the at least third elevation is raised in relation to a main reflector surface in the Z direction, the main reflector surface being one opposite to the printed circuit board The surface of the reflector is closest to the circuit board. The at least one third elevation can be raised less with respect to the main reflector surface in the Z direction than the first elevation and / or the second elevation. This makes it easier to attach the circuit board to the reflector. A first contact surface on a first elevation and a first contact surface on a second elevation can have the same X direction. Likewise, the second contact surface on a first elevation and a second contact surface on a second elevation can have the same Y-direction.

The surveys represent a simple, inexpensive and stable constructive option to provide the contact surfaces for increasing the positional accuracy. They can essentially be freely determined in terms of their number, their geometry and their size, so that there is a high degree of design freedom. At least one of the third elevations ensures that the printed circuit board does not lie flat on the main reflector surface. The distance thus provided between the circuit board and reflector has advantages with regard to the heat exchange between the circuit board and the atmosphere, as a result of which the heating of the circuit board is reduced and any requirements for cooling are reduced. In addition, this ensures that the printed circuit board is not warped when it is attached to the reflector, because tolerances can fluctuate more along the entire main reflector surface than on individual elevations. This also avoids mechanical stresses in the circuit board or at least significantly reduces them. It can sometimes be more cost-effective to achieve the low tolerances on individual elevations than on the entire main reflector surface.

According to a preferred further development of the invention, it can be provided in an LED light module that the at least one first elevation, the at least one second elevation and / or the at least one third elevation are cuboid or essentially cuboid. Essentially means that the outer and rough basic structure of the elevation can correspond to a cuboid, but deviations in the shape of other or additional edges and corners, especially rounded edges and corners, as well as gradients from one cuboid basic structure to another are possible. This shape makes it possible to provide particularly large contact surfaces in order to increase the stability of the arrangement.

According to a preferred further development of the invention, it can be provided in an LED light module that the at least one first elevation, the at least one second elevation and / or the at least one third elevation can predominantly or completely rise within the main reflector surface. As a result, the small main reflector surface available on the reflector can be optimally used.

According to a preferred further development of the invention, it can be provided in an LED light module that the at least one first elevation is passed through at least one first opening in the circuit board, the at least one first opening being formed within the circuit board. This enables the surface available on the circuit board for electronic components to be optimized and ensures that the rigidity of the circuit board is largely maintained.

According to a preferred further development of the invention, it can be provided in an LED light module that the at least one second elevation extends as far as an edge region of the reflector, in particular the main reflector surface, and / or the at least one second elevation is prism-shaped or essentially prism-shaped . Essentially means that the outer and coarse basic structure of the elevation can correspond to a prism, but deviations in the form of other or additional edges and corners, in particular rounded edges and corners, as well as gradients from one prism-shaped basic structure to another are possible. As a result, the second elevation can be embodied on the reflector in a particularly space-saving manner and nevertheless with sufficient rigidity in order to be able to direct a contact force exerted by the circuit board on the second elevation into the reflector.

According to a preferred further development of the invention, it can be provided in an LED light module that (i) at least one first pin of the fastening device, which extends perpendicularly in the Z direction from the fastening device or essentially perpendicularly away and in the direction of the reflector, on the at least one first elevation is supported and / or (ii) at least one second pin of the fastening device, which extends in the Z direction perpendicularly or essentially perpendicularly away from the fastening device and in the direction of the reflector, on which at least one second elevation is supported. As a result, the fastening device is centered on the reflector, whereby the positional accuracy is further increased.

According to a preferred further development of the invention, it can be provided in an LED light module that the fastening device is connected to the reflector by means of a connection means, in particular a form-fitting and / or force-fitting connection means, the connection means in particular through at least one third opening in the circuit board is passed through wherein the at least one third opening is formed within the circuit board. Only one connecting means is preferably used. The connecting means can have a fourth contact surface which rests on the surface of the circuit board. In this sense, the fourth contact surface is not a contact surface of the reflector, as is the case with the first, second and third contact surfaces. The connecting means can have a screw. The connecting means can have a first shaft and a second shaft, wherein the second shaft can have a larger outer diameter than the second shaft. The first shaft and the second shaft can have an external thread. The first shaft can engage with its external thread with an internal thread of the reflector, wherein the first shaft is passed through the third opening of the circuit board. The second shaft can in particular have an outer diameter that is greater than a diameter of the third opening, for example in order to provide the fourth contact surface. The fourth contact surface can be located on an underside of the second shaft, on which there is a connection between the first shaft and the second shaft of the connecting means. The first shaft and / or the second shaft can be made of a plastic or a plastic. This achieves a secure fixing of the printed circuit board with only very small tolerances via the fastening device in the Z direction.

According to a preferred further development of the invention, it can be provided in an LED light module that at least one third pin of the fastening device, which extends perpendicularly or substantially perpendicularly away from the fastening device in the Z direction and in the direction of the reflector, through at least one second opening the circuit board is passed through, wherein the at least one second opening is formed within the circuit board, and wherein the at least one third pin rests against an inner edge of the at least one second opening. This represents a simple but effective way of fixing the circuit board in the X-direction and Y-direction, in which no moment that would reject the positional accuracy acts on the circuit board. In particular, the at least one second opening can be arranged in an area within the circuit board on which the surface of the circuit board does not lie opposite the main reflector surface, in particular the main reflector surface opposite which the elevations rise.

According to a preferred further development of the invention, it can be provided in an LED light module that the at least one third pin is resilient. This enables an additional compensation for minor tolerances. The third pin can for example consist of a plastic.

According to a preferred further development of the invention, in the case of an LED light module, it can be provided that the fastening device is an air guide device for cooling the circuit board, the air guide device being operatively connected to a fan. The air guiding device can be connected to the fan via a fan holder. The air guide device can have air guide channels. The air ducts can be formed by ribs arranged relative to one another. The ribs can protrude transversely from a flat base body of the air guiding device in the direction of the circuit board. The air cooling can thus be combined with the fastening device in order to save additional components and to keep the LED light module compact.

According to a second aspect of the invention, the object is achieved by a method for producing an LED light module for a headlight for a motor vehicle with the following steps: (a) Providing at least one circuit board which has at least one LED for emitting light, the circuit board a longitudinal extension and a width extension running perpendicular to the longitudinal extension, (b) arranging the circuit board on a reflector in such a way that the light emitted by the at least one LED can be reflected in the direction of a translucent headlight cover lens of the headlight, (c) attaching the Circuit board in a desired position on the reflector by a fastening device, the circuit board (i) being placed on at least one first contact surface of the reflector pointing in an X-direction, the X-direction in a plane of the circuit board transverse to the longitudinal extent and / or runs transversely to the extension of the width, (ii) is applied to at least one second contact surface of the reflector pointing in a Y direction, the Y direction running in a plane of the printed circuit board transversely to the longitudinal extension and / or transversely to the widthwise extension and transversely to the X direction, and (iii) is applied to at least one third contact surface of the reflector pointing in a Z direction, the Z direction extending out of the plane of the circuit board and in the direction of a vertical extension of the circuit board.

According to a preferred further development of the invention, it can be provided in a method that the fastening device is connected to the reflector by means of a connection means, in particular a form-fitting and / or force-fitting connection means, the connection means being guided through at least one third opening in the circuit board, wherein the at least one third opening is within the circuit board is designed so that the printed circuit board is pressed against the at least one third contact surface of the reflector pointing in the Z direction via at least one first pin and / or a second pin of the fastening device, which is supported on the reflector.

According to a preferred further development of the invention, in a method it can be provided that at least one third pin of the fastening device, which extends perpendicularly or essentially perpendicularly away from the fastening device in the Z direction and in the direction of the reflector, through at least one second opening in the circuit board is passed through, wherein the at least one second opening is formed within the circuit board, and wherein the at least one third pin is placed on an inner edge of the at least one second opening so that the circuit board on the at least one first contact surface of the reflector and pointing in the X direction / or is pressed against the at least one second contact surface of the reflector pointing in the Y direction.

According to a third aspect of the invention, the object is achieved by a headlight for a motor vehicle with a headlight housing, a translucent headlight cover lens arranged on the headlight housing and an LED light module according to the invention. The LED light module can be arranged on the headlight housing and / or at a distance from the translucent headlight cover lens. The translucent headlight cover lens can be a plastic cover lens.

According to a fourth aspect of the invention, the object is achieved by a vehicle with at least one headlight according to the invention, in particular two headlights according to the invention.

• 1 eine Frontansicht auf ein LED-Lichtmodul nach einem Ausführungsbeispiel der Erfindung,
• 2 eine perspektivische Draufsicht auf das LED-Lichtmodul aus 1,
• 3 die perspektivische Draufsicht auf das LED-Lichtmodul aus 2, gezeigt ohne die Befestigungseinrichtung,
• 4 eine Detailansicht des LED-Lichtmoduls aus 3,
• 5 die perspektivische Draufsicht auf das LED-Lichtmodul aus 2 mit transparent dargestellten Leiterplatten,
• 6 die perspektivische Draufsicht auf das LED-Lichtmodul aus 2 mit transparent dargestellter Befestigungseinrichtung,
• 7 eine frontale Detailansicht auf das LED-Lichtmodul aus 1 bei veränderter Perspektive, und
• 8 eine Frontansicht auf ein Fahrzeug nach einem Ausführungsbeispiel der Erfindung.

The invention is explained in more detail below with reference to the accompanying drawings. All of the features that emerge from the claims, the description or the figures, including structural details and spatial arrangements, can be essential to the invention both individually and in any various combinations. Elements with the same function and / or mode of operation are each provided with the same reference symbols in the figures. If more than one element of the same type is present in one of the figures, the elements are numbered in ascending order, the ascending number of the element being separated from the reference number by a period. Show:

• 1 a front view of an LED light module according to an embodiment of the invention,
• 2 a perspective top view of the LED light module 1 ,
• 3 the perspective top view of the LED light module 2 , shown without the fastening device,
• 4th a detailed view of the LED light module 3 ,
• 5 the perspective top view of the LED light module 2 with transparent printed circuit boards,
• 6th the perspective top view of the LED light module 2 with fastening device shown transparently,
• 7th a detailed front view of the LED light module 1 with a different perspective, and
• 8th a front view of a vehicle according to an embodiment of the invention.

1 shows a front view of an LED light module 10 according to an embodiment of the invention. The LED light module 10 points the reflector 20th , two separate and spaced apart printed circuit boards thereon 30.1 , 30.2 and one on the circuit boards 30.1 , 30.2 arranged fastening device 40 on that the circuit boards 30.1 , 30.2 on the reflector 20th attached. The fastening device 40 is in the present case designed as an air guiding device. The air guiding device has a flat base body 47 and a variety of ribs 48 to form the air ducts in the air duct, with only the ribs for the sake of clarity 48.1 , 48.2 are designated.

2 shows a perspective top view of the LED light module 10 out 1 . Here are the fastening devices designed as an air guiding device 40 , partly the printed circuit board below 30.2 and partly the reflector 20th seen from above, the circuit board 30.1 complete and the circuit board 30.2 mainly in this embodiment from the fastening device 40 is covered. On the fastening device designed as an air guiding device 40 is a fan bracket 50 arranged a fan 49 holds or attached to it. The fan 49 is operatively connected to the fastening device 40 to air over the circuit boards 30.1 , 30.2 to convey and the circuit boards 30.1 , 30.2 to cool thereby.

3 shows the perspective top view of the LED light module 10 out 2 in a representation without the fastening device 40 . This is here to illustrate the layout of the circuit boards 30.1 , 30.2 on the reflector 20th not shown. So far shows 3 a method step in a production of the LED light module 10 before attaching the fastener 40 on the reflector 20th . In this and the following references to the other figures, for the sake of clarity, only the circuit board shown on the right is used 30.2 received, so that mostly also on redundant designation of the circuit board shown on the left 30.1 with reference numerals is omitted below. Essentially the same features of the invention are used in the arrangement of the circuit boards 30.1 , 30.2 realized, with the following specific and noteworthy differences based on the description of the printed circuit board shown on the right 30.2 is received. It is important, however, that both circuit boards are present 30.1 , 30.2 by the same fastening device 40 attached. Of course, it is also possible to have just one or more than two circuit boards 30th by means of the fastening device 40 to fix. The LED light unit 10 can also only have one or more than two on the reflector 20th arranged circuit boards 30th exhibit.

4th shows a detailed view of the LED light module 10 as an enlarged section of the LED light module 10 out 3 , where the cutout is the in 3 printed circuit board shown on the right 30.2 includes. Referring to the printed circuit board shown on the right 30.2 in 3 as well as the detailed view in 4th can be seen that the circuit board 30.2 a first opening 33 has through which a first survey 21st of the reflector 20th is passed through. The first opening 33 and the first survey 21st are essentially cuboid.

The circuit board 30.2 has a longitudinal extension L, a width extension B and a height extension H, as in a plane 31 the circuit board 30.2 is represented by corresponding dashed arrows and a circle. The first survey 21st has a first contact surface 24.1 and a second contact surface 25th on where the circuit board is 30.2 , in particular an inner edge of their first opening 33 , is present. With reference to the directional system of the X direction, Y direction and Z direction shown below, it can be seen that the first contact surface 24.1 , in particular a vertical line of the first contact surface 24.1 , in an X.1 direction and the second contact surface 25th , in particular a vertical line of the second contact surface 25th , pointing in a Y direction. In this exemplary embodiment, the X direction and the Y direction are at an angle of y = 90 ° to one another. In this exemplary embodiment, there is an angle of α = 45 ° between the X.1 direction and the longitudinal extension L, which is shown using the X.2 direction, which indicates the same direction as the X.1 direction in this exemplary embodiment and will be explained in more detail later. In this exemplary embodiment, there is an angle of β = 45 ° between the Y direction and the widthwise extension L. The same direction means in particular that the X.1 direction and the X.2 direction have the same angle α and β.

Furthermore, the reflector 20th a second survey 22nd on that, unlike the first survey 21st and another second bump on the circuit board 30.1 , in this exemplary embodiment, not within an opening in the circuit board 30.2 is arranged. Instead, the at least one second elevation extends 22nd up to an edge area of the reflector 20th and is essentially prismatic. The second survey 22nd has a further first contact surface 24.2 on. In this exemplary embodiment, this has a further first contact surface 24.2 the same X.2 direction as the first contact surface 24.1 the first survey 21st which has the X.1 direction, which is preferred but not necessary. The second survey 22nd also has a further first contact surface, which is not shown, with a Y-direction which in the present case is the Y-direction of the second contact surface 24.1 corresponds, but this does not necessarily have to be the case either.

The circuit board 30.2 also has two second openings 34.1 , 34.2 and a third opening 35 on. In the third opening 35 a first shaft is inserted 45 a connecting means not shown 44 . The function of the second openings 34.1 , 34.2 and the third opening 35 as well as the lanyard 44 and its structure will be discussed later with reference to 6th and 7th explained in more detail.

5 Fig. 3 is a top perspective view of the LED light module 10 out 2 with printed circuit boards shown transparently (in dashed-dotted lines) 30.1 , 30.2 so that under the circuit boards 30.1 , 30.2 on parts of the reflector 20th can be seen. In addition, there are components on one of the reflector 20th facing underside of the circuit board 30.2 to see on the particular the LEDs 32.1 , 32.2 the circuit board 30.2 are located. There are also three third surveys here 23.1 , 23.2 , 23.3 each with a third contact surface 26.1 , 26.2 , 26.3 shown that the reflector 20th on its main reflector surface 27 and which are raised against this. The third surveys 23.1 , 23.2 , 23.3 are spatially spaced from one another and are essentially cuboid. The third contact surface 26.2 has an elongated extension. The third contact surfaces 26.1 , 26.2 , 26.3 practice by putting on the circuit board 30.2 acting gravity on the circuit board 30.2 exert a force in the Z direction and support the circuit board 30.2 thus depend on yourself to make the circuit board 30.2 to be clearly defined in the Z direction.

6th shows the perspective top view of the LED light module 10 out 2 with fastening device shown transparently (in dashed-dotted lines) 40 .

Thus is the circuit board 30.2 to recognize as well as parts of the fastening device 40 and their interaction with the circuit board 30.2 can be recognized. On the first survey 21st a first pin is supported 41 the fastening device 40 from. On the second survey 22nd a second pen supports itself 42 the fastening device. The lanyard 44 , which is closer in 7th is in engagement with the reflector 20th . The lanyard 44 also has a fourth contact surface, which is not designated here, and the circuit board 30.2 opposite and rests against this. This pushes the lanyard 44 the circuit board 30.2 in the Z direction on the third contact surfaces 26.1 , 26.2 , 26.3 of the reflector 20th so that the circuit board 30.2 relative in the Z-direction on the reflector 20th is attached. Furthermore, there are two resilient third pins here 43.1 , 43.2 shown, each through a second opening 34.1 , 34.2 are passed through. The third pens 43.1 , 43.2 each lie on an inner edge of the respective second opening 34.1 , 34.2 the circuit board 30.2 and press the circuit board 30.2 in one direction having directional components in the X direction and Y direction on the first elevation 21st and the second survey 22nd so that the circuit board 30.2 to the first contact surface 24.1 , 24.2 and the second contact surface 25th is pressed.

7th a detailed front view of the LED light module 10 out 1 with a different perspective, the illustrated section of the LED light module 10 compared to the representation 1 was rotated to the left about the Z-axis from the image plane. The detailed view clarifies the in 6th explained mounting of the circuit board 30.2 on the reflector 20th by means of the fastening device 40 . The third pins are clearly visible here 43.1 , 43.2 going through the second openings 34.1 , 34.2 in the circuit board 30.2 go through it and apply a force to the second openings 34.1 , 34.2 , particularly exert their inner edge to the circuit board 30.2 to push in the direction having the direction components in the X-direction and Y-direction. This will make the circuit board 30.2 to the first survey 21st and the second survey 22nd pressed on. On the first survey 21st the partly still visible but partly supported by a rib 48 concealed first pin 41 the fastening device 40 from. On the second survey 22nd the second pin is supported 42 the fastening device 40 from. This type of support for the fastening device 40 on the reflector 20th there is no otherwise the positional accuracy of the circuit board 30.2 rejecting exertion of a force on the circuit board 30.2 and the fastening device 40 is aimed at the reflector 20th out. The first elevation, which is already provided according to the invention, is thereby saved while saving additional formations or parts 21st and second survey 22nd utilized.

Also here is the connector 44 with its second shaft 46 visible with external thread, which has a larger outer diameter than the inner shaft 45 with external thread connected to it and being the external thread of the inner shaft 45 in engagement with a corresponding internal thread in the reflector 20th below the lanyard 44 and is therefore not visible. The second shaft 46 here has the fourth contact surface on an underside of the second shaft 46 on that on the circuit board 30.2 rests or presses on this and the circuit board 30.2 in the Z direction on the third contact surfaces 26.1 , 26.2 , 26.3 of the reflector fixed. This can be done by simply turning the second shaft 46 respectively. The first shaft 45 can in this respect non-rotatably with the second shaft 46 be connected. With that is the circuit board 30.2 on the reflector 20th Arranged with a very high positional accuracy, since in particular the resilient third pins 43.1 , 43.2 ensure tolerance compensation, the circuit board 30.2 in the Z-direction only to a very small extent through the connecting means 44 is influenced and otherwise no parts of the fastening device 40 on the circuit board 30.2 prop up.

8th shows a front view of a vehicle 70 according to an embodiment of the invention. The vehicle 70 has two headlights according to the invention 60.1 , 60.2 on. The headlights each have an LED light module according to the invention 10.1 , a headlight housing 61.1 and a headlight cover lens 62.1 on, with these components in the 8th only for the headlight 60.1 are designated.

List of reference symbols

10

LED light module

20th

reflector

21st

first survey

22nd

second survey

23

third survey

24

first contact surface

25th

second contact surface

26th

third contact surface

27

Main reflector surface

30th

Circuit board

31

level

32

LED

33

first opening

34

second opening

35

third opening

40

Fastening device

41

first pen

42

second pen

43

third pin

44

Lanyard

45

first shaft

46

second shaft

47

Base body

48

rib

49

Fan

50

Fan bracket

60

Headlights

61

Headlight cover housing

62

Headlight cover lens

70

vehicle

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• US 2018/0112844 A1 [0002]

Claims (15)

LED light module (10) for a headlight (60) for a motor vehicle (70) having: (a) at least one circuit board (30) which has at least one LED (32) for emitting light, the circuit board (30) having a Has a longitudinal extension (L) and a width extension (B) running perpendicular to the longitudinal extension (L), (b) a reflector (20) on which the at least one printed circuit board (30) is arranged, around which the at least one LED (32 ) to reflect emitted light in the direction of a translucent headlight cover lens (62) of the headlight (60), (c) a fastening device (40) which fastens the circuit board (30) to the reflector (20), characterized in that ( d) the circuit board (30) is fastened in a desired position on the reflector (20) by the fastening device (40), the circuit board (30) (i) on at least one first contact surface (24) of the reflector pointing in an X direction (20) is applied, the X-direction in an Eb ene of the circuit board (30) runs transversely to the longitudinal extension (L) and / or transversely to the widthwise extension (B), (ii) rests against at least one second contact surface (25) of the reflector (20) pointing in a Y-direction, wherein the Y-direction in a plane of the circuit board (30) runs transversely to the longitudinal extension (L) and / or transversely to the widthwise extension (B) and transversely to the X-direction, and (iii) at least one in a Z-direction showing third contact surface (26) of the reflector (20), the Z-direction extending out of the plane of the circuit board (30) and in the direction of a vertical extension (H) of the circuit board (30). LED light module (10) Claim 1 , characterized in that the circuit board (20) (i) rests against at least two, preferably exactly two, first contact surfaces (24) of the reflector (20) pointing in the X direction and spatially separated from one another and / or (ii) the circuit board ( 30) rests in the Z direction on at least two, preferably at least three, third contact surfaces (26) of the reflector (20) pointing in the Z direction and spatially separated from one another. LED light module (10) Claim 1 or 2 , characterized in that (i) there is an angle (a) in the range from 15 ° to 75 ° between the X direction and the longitudinal extension (L), (ii) an angle between the Y direction and the widthwise extension (B) (β) in the range from 15 ° to 75 ° and / or (iii) there is an angle (y) in the range from 30 ° to 90 ° between the X direction and the Y direction. LED light module (10) according to one of the preceding claims, characterized in that (i) the at least one first contact surface (24) on at least one first elevation (21) and / or on at least one second elevation (22) of the reflector (20 ) is arranged, ii) the at least one second contact surface (25) is arranged on the at least one first elevation (21) and / or on the at least one second elevation (22) of the reflector (20), and / or iii) the at least a third contact surface (26) is arranged on at least one third elevation (23) of the reflector (20), the at least first elevation (21), the at least second elevation (22) and / or the at least third elevation (23) being opposite a The main reflector surface (27) is raised in the Z-direction, the main reflector surface (27) being a surface of the reflector (20) opposite the printed circuit board (30) and having the smallest distance from the printed circuit board (30). LED light module (10) Claim 4 , characterized in that the at least one third elevation (23) is raised less than the first elevation (21) and / or the second elevation (22) in relation to the main reflector surface (27) in the Z direction. LED light module (10) Claim 4 or 5 , characterized in that the at least one first elevation (21) is passed through at least one first opening (33) in the circuit board (30), the at least one first opening (33) being formed within the circuit board (30). LED light module (10) according to one of the Claims 4 to 6th , characterized in that the at least one second elevation (22) extends up to an edge region of the reflector (20) and / or is prism-shaped or essentially prism-shaped. LED light module (10) according to one of the Claims 4 to 7th , characterized in that (i) at least one first pin (41) of the fastening device (40), which extends in the Z direction from the fastening device (40) perpendicularly or essentially perpendicularly away and in the direction of the reflector (20) the at least one first elevation (21) is supported and / or (ii) at least one second pin (42) of the fastening device (40), which extends in the Z-direction from the fastening device (40) perpendicularly or substantially perpendicularly away and in the direction of the reflector (20) on which at least one second elevation (22) is supported. LED light module (10) according to one of the preceding claims, characterized in that the fastening device (40) by means of a connecting means (44), in particular one which acts positively and / or non-positively Connecting means (44) to which the reflector (20) is connected, the connecting means (44) being guided in particular through at least one third opening (35) in the circuit board (30), the at least one third opening (35) being inside the circuit board ( 30) is formed. LED light module (10) according to one of the preceding claims, characterized in that at least one third pin (43) of the fastening device (40), which extends in the Z-direction from the fastening device (40) perpendicularly or substantially perpendicularly and in the direction of the reflector (20), is passed through at least one second opening (34) of the circuit board (30), the at least one second opening (34) being formed within the circuit board (30), and the at least one third pin (43 ) rests against an inner edge of the at least one second opening (34). LED light module (10) Claim 10 , characterized in that the third pin (43) is resilient. LED light module (10) according to one of the preceding claims, characterized in that the fastening device (40) is an air ducting device for cooling the circuit board (30), which is operatively connected to a fan (49). A method for producing an LED light module (10) for a headlight (60) for a motor vehicle (70), comprising the steps of: (a) providing at least one circuit board (30) which has at least one LED (32) for emitting light, wherein the printed circuit board (30) has a longitudinal extension (L) and a width extension (B) running perpendicular to the longitudinal extension (L), (b) arranging the printed circuit board (30) on a reflector (20) in such a way that the at least one LED (32) emitted light can be reflected in the direction of a transparent headlight cover lens (62) of the headlight (60), (c) fastening the circuit board (30) in a desired position on the reflector (20) by a fastening device (40), characterized in that the circuit board (30) (i) is placed on at least one first contact surface (24) of the reflector (20) pointing in an X direction, the X direction in a plane of the circuit board (30) transverse to the Longitudinal extension (L) and / or runs transversely to the width extension (B), (ii) is placed on at least one second contact surface (25) of the reflector (20) pointing in a Y-direction, the Y-direction in a plane of the circuit board (30) runs transversely to the longitudinal extension (L) and / or transversely to the widthwise extension (B) and transversely to the X direction, and (iii) placed on at least one third contact surface (26) of the reflector (20) pointing in a Z direction is, wherein the Z-direction extends out of the plane of the circuit board (30) and in the direction of a vertical extension (H) of the circuit board (30). Headlight (60) for a motor vehicle (70) with a headlight housing (61), a translucent headlight cover lens (62) arranged on the headlight housing (61) and an LED light module (10) according to one of the Claims 1 to 12 . Motor vehicle (70) with at least one headlight (60) according to Claim 14 .

Images