CN111237715A

CN111237715A - Optical assembly, lighting and/or signalling device and vehicle

Info

Publication number: CN111237715A
Application number: CN201811469635.0A
Authority: CN
Inventors: 刘强; 万婷; 向云云; 朱玉娟
Original assignee: Valeo Lighting Hubei Technical Center Co Ltd
Current assignee: Valeo Lighting Hubei Technical Center Co Ltd
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2020-06-05
Anticipated expiration: 2038-11-28
Also published as: EP3887715B1; CN111237715B; WO2020108511A1; EP3887715A4; EP3887715A1

Abstract

The invention relates to an optical assembly, a lighting and/or signaling device and a vehicle. The optical assembly (10) comprises a heat dissipation module (20), a light emitting module (30) and a reflection module (40), the light emitting module (30) has a light source (31) and is arranged on the heat dissipation module (20), at least a part of the light emitted by the light source (31) reaches a reflection surface of the reflection module (40), wherein a tab (45) is provided on a side of the reflection module (40) opposite to the reflection surface, the tab has a notch (46), the heat dissipation module (20) has a pivot (26) accommodated in the notch (46) respectively, and the reflection module (40) is positioned and connected to the heat dissipation module (20).

Description

Optical assembly, lighting and/or signalling device and vehicle

Technical Field

The invention relates to an optical assembly, a lighting and/or signaling device and a vehicle.

Background

A multiplicity of lighting and/or signaling devices for vehicles are known from the prior art, which have a light source, a heat sink and a reflector, which are usually fastened to one another in a complicated manner.

Disclosure of Invention

It is therefore an object of the present invention to provide an optical component, a lighting and/or signaling device having the optical component, which enables at least a simplified assembly.

According to the invention, the optical assembly comprises a heat-dissipating module, a light-emitting module and a reflecting module, the light-emitting module having a light source and being arranged on the heat-dissipating module, at least a part of the light emitted by the light source reaching a reflecting surface of the reflecting module, wherein a tab is provided on the side of the reflecting module opposite to the reflecting surface, the tab having a notch, the heat-dissipating module accordingly having a pivot received in the notch, and the reflecting module being positioned and connected to the heat-dissipating module. By accommodating the pivot in the slot, a simplified assembly can be achieved, at least to some extent.

According to an embodiment of the invention, one or more tabs are provided, each having an opening therein, the width of the opening corresponding to the size of the pivot to enable positioning of the pivot in at least one direction. In particular in the case of a plurality of webs, and the linear arrangement of the openings in the webs, the robustness of the connection can be increased accordingly.

According to an embodiment of the invention, an interface for adjusting an adjustment module of the optical component is provided on the heat sink module. For example, the adjusting module may be in the form of an electric motor or a manually adjusted screw transmission, wherein an end of a rotor shaft of the electric motor or an end of a threaded rod of the screw transmission may engage into the interface, thereby converting the relevant rotational movement into a tilting of the optical component about a horizontal or vertical axis of rotation to adjust the light distribution of the light emitted by the optical component to meet regulatory requirements.

According to an embodiment of the invention, a rib is provided on the heat sink module, the height of the rib being at least equal to the height of the section of the light emitting module protruding beyond the upper edge of the reflective surface of the reflective module. Preferably, the light source and other electronic components are arranged between the ribs, which may prevent damage to the light source and other electronic components upon assembly. In case the ribs extend continuously, it may also prevent undesired lateral light leakage.

According to an embodiment of the invention, the light emitting module is a printed circuit board assembly having a printed circuit board on which the light source is arranged.

According to an embodiment of the present invention, a heat transfer material is disposed between the heat dissipation module and the light emitting module. The heat transfer material may be a flexible heat transfer sheet or a heat sink silicone, which may ensure good heat transfer between the heat sink module and the light emitting module.

According to an embodiment of the invention, the reflection module is provided with a positioning structure, which cooperates with a cooperating positioning structure of the light emitting module. For example, the positioning structures are in the form of positioning bosses and the mating positioning structures are in the form of positioning holes, which in the assembled state form a form-fitting connection, thereby achieving a precise positioning of the light source relative to the reflection surface of the reflection module. The locating formations and cooperating locating formations may also take other suitable forms.

According to an embodiment of the invention, the heat dissipation module is integrally formed, for example cast from a metallic material, in particular aluminum. This allows cost-effective production.

According to an embodiment of the invention, the optical component has at least one light source to perform one or more light functions. Preferably, the light source is a light emitting diode, such as a white light emitting diode, a red light emitting diode or a yellow light emitting diode, to perform the functions of a headlight, a taillight, a stop light or a turn light, respectively.

The invention also relates to a vehicle having an optical assembly or a lighting and/or signaling device as described above.

Drawings

The invention is further elucidated below with the aid of the drawing. Wherein:

fig. 1 schematically shows a cross-sectional view of a lighting and/or signaling device for a vehicle;

fig. 2 schematically shows a perspective view of an optical assembly of a lighting and/or signaling device for a vehicle according to the invention;

FIG. 3 shows an exploded view of the optical assembly of FIG. 2;

FIG. 4 shows a side view of the optical assembly of FIG. 2;

FIG. 5 shows a partial enlarged view of region A of FIG. 4; and is

Fig. 6a to 6c schematically show an assembly process of the optical assembly of fig. 2.

Detailed Description

Embodiments of the present invention are exemplarily described below. As will be realized by those skilled in the art, the illustrated embodiments can be modified in various different ways, without departing from the spirit of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive. In the following, the same reference numbers generally indicate functionally identical or similar elements.

Fig. 1 schematically shows a sectional view of a lighting and/or signaling device for a vehicle.

The lighting and/or signaling device in question is, for example, a headlight 100 of a vehicle. The headlamp 100 mainly includes a housing 11 and a cover 12 covering a front opening of the housing 11. The housing 11 and the cover 12 together form an inner space 13 in which the optical assembly 10 is accommodated. The optical component 10 is used, for example, for generating at least one of a low beam distribution or a high beam distribution, or for generating a further light distribution. For this purpose, an adjusting module 50 for adjusting the optical component 10 is also provided in the interior space 13 to adjust the optical axis of the optical component 10 to produce a light distribution that meets the regulatory requirements. The adjusting module may adopt various structures known in the art and will not be described in detail herein.

The optical assembly 10 according to the invention, which is likewise arranged in the interior space formed by the housing 11 and the cover 12 and comprises a heat sink module 20, a light-emitting module 30 and a reflection module 40, is explained below with the aid of fig. 2 to 5.

Here, both the light emitting module 30 and the reflecting module 40 are connected and positioned to the heat dissipating module 20. The heat sink module 20 is also provided with an interface for adjusting the adjusting module 50 of the optical component 10, wherein three

interfaces

23a, 23b and 23c are shown by way of example, one of which can be in the form of a ball and socket joint of a ball joint, and the other two of which engage with corresponding adjusting means of the adjusting module, so that the entire optical component 10 can be tilted about the ball joint under adjustment of the adjusting means in order to achieve an adjustment of the optical axis.

The light module 30 may be in the form of a printed circuit board assembly having a printed circuit board 32, a light source mounted on the printed circuit board, and other electrical components, such as a connector 33 for connection to an onboard power supply, a capacitor or resistor, and the like.

At least a part of the light emitted by the light source can reach the reflection surface of the reflection module 40 and exit in the direction of the housing opening in a reflected manner via the reflection surface, as is indicated by the arrow H in fig. 1. The light source may be in the form of a light emitting diode, LED. Here, a first light source 31a and a second light source 31b are exemplarily shown arranged above the reflection module 40. Of course, the number and kind of the light sources may be selected as desired, and they may be disposed at other suitable positions of the reflection module 40, such as left and/or right sides.

The printed circuit board 32 rests with its side opposite to the side on which the light sources are arranged on the heat sink module 20. In order to achieve good heat dissipation, a heat transfer material, such as a flexible heat transfer sheet or a heat dissipation silicone, may be provided between the printed circuit board 32 and the heat dissipation module 20 to ensure good thermal conductivity between the light emitting module 30 and the heat dissipation module 20.

To ensure accurate positioning of the light source relative to the reflector module 40, the printed circuit board 32 and the reflector module 40 may have co-acting positioning structures. For example, the reflection module 40 may have positioning

bosses

43a, 43b, and the printed circuit board 32 may have fitting positioning holes 33 into which the positioning bosses fit to form a form-fitting connection. The mating locating holes may also be provided on the heat dissipation module 20 to simplify assembly.

Alternatively, the light source of the light emitting module 30 may be directly disposed on the heat dissipation module 20. In this case, directly in the heat sink module 20, cooperating positioning structures are provided which interact with the positioning structures of the reflector module 40, for example in the form of a mortise and tenon structure.

The reflection module 40 is in the form of a reflector, the reflection surface of which is curved and faces the light source. The reflecting surface may be a parabolic reflector or a combination of multiple facets. In the former case, the basic surface of the reflection surface is a paraboloid of revolution whose center axis of revolution forms the optical axis of the reflection module, which corresponds to the longitudinal direction of the vehicle, and the mutual positional relationship of the reflection surface of the reflection module 40 and the light source is set such that the focal point of the reflection surface coincides with the light source. In the latter case, the respective patch combinations are assigned to the associated light sources to produce the desired light distribution. As shown in fig. 3, the first patch combination 41a is assigned to the first light source 31a and the second patch combination 42a is assigned to the second light source 31b, resulting in a low beam distribution or a high beam distribution, for example.

The reflection module 40 can be injection molded from plastic, with its reflection surface formed by a metal coating, such as an aluminum coating.

The heat dissipation module 20 is integrally cast, for example, from metal, particularly aluminum, and has a function of dissipating heat generated by the light source. In order to further improve the heat dissipation function of the heat dissipation module 20, a plurality of protruding fins may be disposed on a side of the heat dissipation module away from the reflection module.

The heat dissipation module 20 may have a first section 20a and a second section 20 b. The light emitting module 30 is arranged on the side of the first section 20a facing the reflective surface. In the first section 20a,

further perforations

24a, 24b, 24c are provided, which interact with

openings

44a, 44b, 44c provided in the reflector module 40. The

perforations

24a, 24b, 24c and the

apertures

44a, 44b, 44c are aligned with one another, respectively. The

openings

44a, 44b, 44c may be in the form of threaded holes, and the screws 60 may be inserted into the aligned holes, thereby fixedly connecting the heat dissipation module and the reflection module. The number and position of the perforations and openings can be set as desired. The

openings

44a, 44b, 44c are provided at the edge of the reflective module 40 adjacent to the heat dissipation module 20.

In particular in the case of a light-emitting module 30 in the form of a circuit board assembly, the light-emitting module 30 is arranged here between the first section 20a of the heat sink module 20 and the reflector module 40.

The first section of the heat dissipation module 20 may be provided with a rib 21 having a height at least equal to that of a section of the light emitting module 30 protruding beyond an upper edge of the reflective surface of the reflective module 40. A pair of ribs 21 is preferably provided, between which the above-described sections of the light emitting module 30 are arranged, thereby protecting the associated electronic components and preventing lateral light leakage.

At least one pair of plates 25 projects from the side of the second section 20b of the heat sink module 20 facing the reflector module, between which a cylindrical pivot 26 is formed. The outer contour of the second portion 20b approximately corresponds to the course of the outer contour of the reflector module. More specifically, the end of the second section adjacent to the first section and the end provided with the plate 25 are displaced in the optical axis direction. This can reduce the length of the plate and achieve a compact structure.

A tab 45 is formed on the side of the reflector module 40 opposite the reflective surface, the tab having a slot 46 open at one end. Only one tab is shown here, but a plurality of tabs with corresponding notches can of course also be provided. The width of the slot is equal to the diameter of the cylindrical pivot 26. The pivot 26 of the thermal module 20 fits into the notch 46, as can be seen in fig. 4 and 5.

Fig. 6a to 6c schematically show the assembly process of the optical assembly: first, the pivot shaft 26 of the heat dissipation module 20 having the light emitting module 30 is fitted into the notch 46 of the tab 45 of the reflection module 40. Preferably pushing the pivot 26 into the bottom of the slot 46; then, rotating the heat dissipation module relative to the reflection module in a direction R such that the light source of the light emitting module disposed on the heat dissipation module faces the reflection surface of the reflection module; next, the pivot shaft is guided in the slot in the direction of the open end of the slot, while at the same time, the positions of the heat dissipation module 20 and the reflection module 40 are adjusted such that the positioning bosses of the reflection module 40 are inserted into the associated mating positioning holes and the through holes and the openings for the screws 60 are aligned with each other; finally, the screw is screwed in.

By providing the heat sink module 20 on the side facing the reflection surface with a rib having a height at least corresponding to the height of the section of the light emitting module projecting beyond the upper edge of the reflection surface of the reflection module 40, damage to the relevant electrical components during assembly is advantageously prevented. Furthermore, the continuously extending ribs may also prevent side leakage of unwanted light.

In addition to the screw connection, other suitable connection methods may be used, such as snap connection, riveting, welding, etc., when the modules are in the correct position relative to each other.

The present invention is not limited to the above configuration, and various other modifications may be adopted. While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims

1. An optical assembly (10) for a lighting and/or signaling device of a vehicle, comprising a heat dissipating module (20), a light emitting module (30) and a reflecting module (40), the light emitting module (30) having a light source (31) and being arranged on the heat dissipating module (20), at least a portion of the light emitted by the light source (31) reaching a reflecting surface of the reflecting module (40), characterized in that a tab (45) having a notch (46) is provided on the side of the reflecting module (40) opposite to the reflecting surface, the heat dissipating module (20) respectively having a pivot (26) received in the notch (46), and the reflecting module (40) being positioned and connected to the heat dissipating module (20).

2. Optical assembly (10) according to claim 1, characterized in that a plurality of tabs (45) are provided, which have notches (46).

3. The optical assembly (10) of claim 2, wherein the width of the slot (46) corresponds to the diameter of the pivot (26).

4. The optical component (10) according to claim 2, characterized in that an interface for adjusting an adjusting module (50) of the optical component (10) is provided on the heat sink module (20).

5. Optical assembly (10) according to claim 2, characterized in that a rib (21) is provided on the heat sink module (20), the height of the rib (21) being at least equal to the height of the section of the light emitting module (30) protruding beyond the upper edge of the reflective surface of the reflective module (40).

6. The optical assembly (10) according to any one of claims 1 to 5, wherein the light emitting module (30) is a printed circuit board assembly having a printed circuit board (32), the light source being arranged on the printed circuit board (32).

7. The optical assembly (10) of claim 6, wherein a heat transfer material is disposed between the heat dissipation module (20) and the light emitting module (30).

8. Optical assembly (10) according to claim 6, characterized in that the reflective module (40) is provided with a positioning structure which cooperates with a cooperating positioning structure of the light emitting module (30).

9. The optical assembly (10) of any one of claims 1 to 5, wherein the heat sink module (20) is integrally formed.

10. The optical assembly (10) of claim 9, wherein the heat sink module (20) is made of aluminum.

11. The optical component (10) according to any one of claims 1 to 5, characterized in that the optical component (10) has at least one light source to realize one or more light functions.

12. The optical assembly (10) of claim 11, wherein the light source is a light emitting diode.

13. A lighting and/or signalling device having an optical assembly (10) according to any one of the preceding claims.

14. Vehicle with an optical assembly (10) according to one of claims 1 to 12 or a lighting and/or signaling device according to claim 13.