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(11) | EP 4 495 475 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | LIGHTING DEVICE FOR A VEHICLE |
| (57) A vehicle lighting device (1) including: a reflector (2); an LED lighting source
(3) configured to emit light radiation (R) towards the reflector (2) and arranged
on a support (4) having the function of dissipating the heat emitted, in use, by the
LED lighting source (3); and a connection and adjustment device (5) interposed between a support portion (6) of the reflector (2) and the support (4) and suitable for enabling the positioning of the LED lighting source (3) with respect to the reflector (2) along three directions: Z, X, and Y, orthogonal to each other. |
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This patent application claims priority from Italian patent application no. 102023000015186 filed on July 19, 2023, the entire disclosure of which is incorporated herein by reference.
TECHNICAL FIELD
BACKGROUND OF THE INVENTION
[0003] Vehicle lighting devices are known comprising: a reflector; an LED lighting source configured to emit light radiation towards the reflector and arranged on a support having the function of dissipating the heat emitted, in use, by the LED lighting source.
[0004] The support is connected to a perimeter portion of the reflector using a device for positioning the LED lighting source in relation to the reflector. The known positioning devices do not precisely arrange the LED in relation to the reflector and, in particular, do not enable the adjustment of the support using three directions orthogonal to each other. For this reason, the position of the LED lighting device in relation to the reflector may differ compared to what is planned and the performance of the lighting device may be negatively affected.
SUBJECT OF THE INVENTION
[0005] The purpose of this invention is to provide a lighting device that enables, in a simple and economic way, the adjustment of the support using three directions that are orthogonal to each other.
PURPOSE OF THIS INVENTION
[0006] The above-mentioned purpose is achieved with this invention in that it relates to a lighting device for a vehicle of the type described in claim 1.
DESCRIPTION OF THE FIGURES
[0007] The invention will be illustrated with reference to the accompanying figures wherein:
Figure 1 illustrates, in perspective view, a lighting device for vehicles produced according to the precepts of this invention; and
Figure 2 illustrates, in a view from above, the device in Figure 1 - Figure 2 also has a detail on an enlarged scale (this portion is enclosed with dashed lines).
PREFERRED DESCRIPTION OF THE INVENTION
[0008] With reference to Figure 1, the reference number 1 identifies a vehicle lighting device comprising: a reflector 2 (partially represented and known); a known LED lighting source 3 configured to emit light radiation R towards the reflector 2 and arranged on a support 4 having the function of dissipating the heat emitted, in use, by the LED lighting source 3.
[0009] As is known, the heatsink absorbs thermal energy that the LED produces and transfers it to the surrounding environment, preventing the joint of the LED from reaching a temperature that is too high. In this way, the heatsink adjusts the operating temperature of the LED.
[0010] The lighting device 1 comprises a connection and position adjustment device 5 interposed between a perimeter support portion 6 of the reflector 2 and the support 4 and suitable for enabling the positioning of the LED lighting source 3 with respect to the reflector 2 with the methods that will be clarified below.
[0011] The connection and adjustment device 5 comprises a flat rectangular wall 7 provided with three raised perimeter edges 7a designed to increase the air exchange surface and provided with a pair of through openings 8a, 8b (Figure 2), each of which has, in plan view, an "S" shape.
[0012] The flat rectangular wall 7 is configured to be arranged abutting against a support portion 9 of the portion 6. Conveniently, the support portion 9 is formed by three rectilinear portions (not illustrated) of the perimeter portion 6 which are coplanar with each other and arranged, in plan view, at the edges of a triangle.
[0013] The connection and adjustment device 5 also comprises a pair of appendages 10a, 10b extending integrally from the perimeter support portion 6 of the reflector and are configured to engage respective apertures 8a, 8b allowing movement of the flat wall towards the support portion 9 along a first direction Z. The appendages 10a, 10b have an L-section.
[0014] Two adjacent, perpendicular sides of the L-shaped appendages 10a, 10b have, in cross section, a first and a second dimension d1, d2 that are transverse to each other (see the enlarged portion in Figure 2).
[0015] The first and second dimension d1 e d2 have a length value less than the length 11, 12 of corresponding facing edges of the through opening 8a, 8b in such a way that the appendages are spaced with respect to the edges with clearance Δx, Δy which permits the displacement of the flat wall 7 along a second X direction and a third Y direction coplanar to each other and perpendicular to the first Z direction when the plane wall 7 is resting on the support portion 9 and the appendages 10a, 10b engage the openings 8a, 8b.
[0016] The connection and adjustment device 5 also comprises a screw 12 configured to engage a through hole 13 of the flat wall 7 and a threaded seat (not illustrated) created in the perimeter portion 6.
[0017] In use, to assemble the support 4 on the reflector 2, an operator moves the flat wall 7 along Z, making the appendages 10a, 10b enter the apertures 8a, 8b until the flat wall abuts against the support portion 9. The operator thus twists the screw 7; thus, the LED source 3 is stably positioned along Z. Subsequently, the operator, exploiting the presence of clearances Δx, Δy, can precisely adjust the position of the source 3 along X and Y. Once the definitive position is reached, the screw 12 is further tightened in order to achieve a final, stable position.
a reflector (2);
an LED lighting source (3) configured to emit light radiation (R) towards the reflector (2) and arranged on a support (4) having an heatsink function for the heat emitted, in use, by the LED lighting source (3); and
means of connection and adjustment (5) interposed between a perimeter support portion (6) of said reflector (2) and said support (4) and suitable for enabling the positioning of the LED light source (3) with respect to said reflector (2),
characterized in that said means of connection and adjustment (5) comprises:a flat wall (7) of said heatsink support provided with a pair of through openings (8a, 8b) and configured to be arranged in abutment on a support portion (9) of said perimeter support portion (6);
a pair of appendages (10a, 10b) extending integrally from the perimeter support portion (6) of the reflector and configured to engage respective apertures (8a,8b) allowing movement of the flat wall towards the support portion (9) along a first direction Z;
said appendages (10a,10b) having a cross-section having a first and a second dimension (d1,d2) transverse to each other and having a length value less than the length (11,12) of corresponding facing edges (c1, c2) of the through opening (8a, 8b) in such a way that the appendages are spaced with respect to the edges with clearance Δx, Δy which permits the displacement of the flat wall along a second X direction and a third Y direction coplanar to each other and perpendicular to the first Z direction when the flat wall is resting on the support portion (9) and the appendages engage the openings.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Patent documents cited in the description