Method of assembling light module for vehicle headlamp
By using curing light to harden the adhesive during the assembly process of the vehicle headlight module, the problem of difficulty in uniform curing of the adhesive in the small headlight module is solved, and the stable fixation and position of the main optical devices are achieved. reliability.
Patent Information
- Application Number
- CN202410952110.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-08-17
- Filing Date
- 2024-07-16
- Publication Date
- 2025-02-21
AI Technical Summary
As the size of the headlights and headlight modules becomes smaller and smaller, it is difficult for the adhesive to cure uniformly during the curing process, resulting in increased stress at the joint point and deformation of the position of the main optical devices.
An assembly method is adopted to ensure uniform curing of the adhesive by setting a fixing opening on the substrate and hardening the adhesive with curing light (such as UV light). The method includes providing a primary optic and a substrate, applying an adhesive into a fixing opening of the substrate, aligning the primary optics to a final position on the substrate, and hardening the adhesive by curing light.
By ensuring uniform curing of the adhesive, deformation of the main optical devices in their final position is avoided, and the stability of the optical module and installation reliability are improved.
Smart Images
Figure CN119489026A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a method for assembling a light module for a vehicle headlamp. Background Art
[0002] As the size of headlamps and headlamp light modules continues to decrease, it is necessary to find ways and methods of mounting components, especially primary optics, that can be used in such small sizes.
[0003] Due to the small size, it is increasingly difficult to ensure uniform curing of the adhesive, which can lead to stresses at the bonding point and thus to distortion of the position of the primary optics. It is therefore an object of the present invention to provide an enhanced method of assembling a light module for a vehicle headlamp in order to overcome the disadvantages of the prior art. Summary of the invention
[0004] To achieve this objective, the method comprises the following steps which are performed in chronological order:
[0005] a) Provide:
[0006] - a primary optic comprising a lens portion corresponding to the light source and a fixing device, wherein the fixing device comprises at least one protrusion and a light entry surface for receiving the curing light, wherein at least one protrusion comprises a light output portion for letting the curing light exit,
[0007] a base configured to hold at least one light source and a primary optic, wherein the base comprises at least one fixing opening configured to receive at least one protrusion of the primary optic,
[0008] - at least one light source arranged on a substrate,
[0009] b) applying an adhesive into at least one fixing opening of the substrate;
[0010] c) aligning the primary optical component to a final position on the base body such that light emitted by the at least one light source can be received by a lens portion of the primary optical component, wherein in the final position at least one protrusion of the primary optical component is inserted into at least one fixing opening of the base body;
[0011] d) hardening the adhesive by emitting curing light onto a light entry surface of the fixture, wherein the fixture is configured to direct the curing light within the primary optics to a light output portion of the protrusion to harden the adhesive.
[0012] This ensures uniform curing of the adhesive which does not cause deformation of the primary optic in its final position.
[0013] Advantageously, in the final position of the primary optic on the substrate, the light output portion of the protrusion of the primary optic is positioned such that the adhesive directly covers the light output portion. Or in other words, the adhesive is provided between the substrate and the light output portion.
[0014] Advantageously, in step a), a robotic arm for holding the primary optical device is also provided, wherein the fixing device comprises at least one holding element, which is configured to correspond to the robotic arm so that the robotic arm can engage with the at least one holding element to hold the primary optical device, wherein in step c), the robotic arm holds the primary optical device by means of the holding element and aligns the primary optical device.
[0015] Advantageously, the curing light is UV light.
[0016] Advantageously, the UV light is generated by a point-type UV light source. Additional beam-forming optics enable the UV light to be coupled precisely into the holding element via the light entry surface. Advantageously, the adhesive is a UV adhesive.
[0017] Advantageously, the adhesive is a hybrid adhesive. So-called hybrid adhesives are used for gluing in locations that cannot be reached directly with UV light due to special geometries. The thermal curing of these hybrid adhesives increases the load on the optical material. In addition, complex devices are required to accurately maintain the final position during this long temperature curing process.
[0018] Advantageously, the robotic arm comprises a UV light source.
[0019] Advantageously, the robot arm comprises a UV adhesive device for applying a UV adhesive into the at least one fixing opening in step b).
[0020] Advantageously, the primary optics comprises at least two holding elements, which are arranged on opposite sides of the primary optics.
[0021] Advantageously, at least one retaining element is designed as a projection.
[0022] Advantageously, at least one retaining element and / or the projection acts as a light guide for the curing light in order to guide the curing light from the light entry surface to the light output portion and out of the light output portion.
[0023] Advantageously, at least one light source is designed as an LED.
[0024] Advantageously, in a further step e), when the primary optical component is in its final position on the base body, additional adhesive is applied in the fixing openings in order to further strengthen the fixing of the primary optical component in the final position.
[0025] It should be noted here that, unless stated otherwise, explanations and features relating to the method according to the invention also relate to the device according to the invention and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The present invention is explained in more detail below with the aid of exemplary drawings.
[0027] Figure 1 A cross-sectional view of a light module assembled by the method according to the invention, wherein the light module comprises primary optics aligned with a substrate having a light source;
[0028] Figure 2 a perspective view of a robotic arm engaging with the primary optic to align the primary optic onto a substrate; and
[0029] Figure 3 along Figure 2 Cross-sectional view along line AA of an assembly step. DETAILED DESCRIPTION
[0030] Figure 1 A light module 10 for a vehicle headlamp is shown, assembled by a method according to the invention, wherein the method comprises a first step a), wherein a primary optic 100 is provided. The primary optic 100 comprises a lens portion 110 corresponding to a light source 300 and a fixing device 150, wherein the fixing device 150 comprises at least one protrusion 160 and a light entry surface 170 for receiving curing light, wherein the at least one protrusion 160 comprises a light output portion 161 for leaving the curing light. In the example shown, the curing light is UV light.
[0031] Furthermore, a base body 200 is provided, which is configured to hold at least one light source 300 and the primary optics 100, wherein the base body 200 comprises two fixing openings 210, which are configured to receive at least one protrusion 160 of the primary optics 100. Furthermore, a light source 300 is provided, which is arranged on the base body 200. In the example shown, the light source 300 is designed as an LED.
[0032] In addition, a robotic arm 500 is provided for holding the primary optical device 100 (which can be Figure 2 and Figure 3 ), wherein the fixing device 150 includes two holding elements 180, which are configured to correspond to the robot arm 500 so that the robot arm 500 can engage with the holding elements 180 to hold the main optical device 100. As can be seen in Figures 1 to 3 As can be seen in FIG. 1 , the retaining element 180 is constructed as a protrusion 160 and is arranged on the opposite side of the primary optics 100 .
[0033] In the next step b), an adhesive 400 is applied to the two fixing openings 210 of the base body 200. In the example shown, the adhesive is a UV adhesive or a hybrid adhesive. In addition, the robot arm 500 includes a UV adhesive device for applying the UV adhesive 400 to the fixing openings 210 (not shown in the figure).
[0034] In a further step c), the primary optical device 100 is applied to a final position on the base body 200, wherein the robot arm 500 holds the primary optical device 100 via the holding element 180 and aligns the primary optical device 100 so that the light emitted by the light source 300 can be precisely received by the lens part 110 of the primary optical device 100, wherein in the final position, at least one protrusion 160 of the primary optical device 100 is inserted into the fixing opening 210 of the base body 200.
[0035] In the final position of the primary optic 100 on the substrate 200, the light output portion 161 of the protrusion 160 of the primary optic 100 is positioned so that the adhesive 400 directly covers the light output portion 161. Or in other words, the adhesive 400 is disposed between the substrate 200 and the light output portion 161, as can be seen in FIG. Figure 1 Seen in.
[0036] In a next step d), the UV adhesive 400 is hardened by emitting UV light onto the light entry surface 170 of the fixture 150, wherein the retaining element 180 and the protrusion 160 act as a light guide for the fixture 150 and are configured to guide the UV within the primary optics 100 to the light output portion 161 of the protrusion 160 in order to harden the UV adhesive 400. In the example shown, in particular Figure 3 As shown, the robot arm 500 includes a UV light source 510 for emitting UV onto the light entry surface 170, wherein the UV light source 510 is constructed as a point-type UV light source.
[0037] also, Figure 3 Exemplary light emitted by UV light source 510 of robotic arm 500 is shown, where it can be seen how the light enters light entry surface 170 and is directed within primary optics 100 and protrusion 160 to light output portion 160 and out of the light output portion to cure adhesive 400.
[0038] Optionally, in a further step e), when the primary optical device 100 is in the final position on the substrate 200, additional adhesive (eg structural adhesive) is applied in the fixing opening 210 to further strengthen the fixing of the primary optical device 100 in the final position.
[0039] List of Reference Numerals
[0040] Optical module… 10
[0041] Main optical components… 100
[0042] Lens part… 110
[0043] Fixing device… 150
[0044] Protrusion… 160
[0045] Light output part… 161
[0046] Light enters the surface... 170
[0047] Holding element… 180
[0048] Base… 200
[0049] Fixing opening… 210
[0050] Light source… 300
[0051] Adhesive… 400
[0052] Robotic arm… 500
[0053] UV light source…510.
Claims
1. A method for assembling a light module (10) for a vehicle headlamp, the method comprising the following steps performed in chronological order: a) Provide: - a primary optical device (100) comprising a lens portion (110) corresponding to the light source (300) and a fixing device (150), wherein: The fixing device (150) comprises at least one protrusion (160) and a light entry surface (170) for receiving curing light, wherein the at least one protrusion (160) comprises a light output portion (161) for allowing the curing light to exit, - a base (200) configured to hold at least one light source (300) and the primary optical device (100), wherein the base (200) comprises at least one fixing opening (210) configured to receive the at least one protrusion (160) of the primary optical device (100), - at least one light source (300), said at least one light source being arranged on said substrate (200), b) applying an adhesive (400) into the at least one fixing opening (210) of the substrate (200); c) aligning the primary optical device (100) to a final position on the base (200) so that light emitted by the at least one light source (300) can be received by the lens portion (110) of the primary optical device (100), wherein in the final position, the at least one protrusion (160) of the primary optical device (100) is inserted into the at least one fixing opening (210) of the base (200); d) hardening the adhesive (400) by emitting curing light onto the light entry surface (170) of the fixture (150), wherein the fixture (150) is configured to guide the curing light within the primary optical device (100) to the light output portion (161) of the protrusion (160) so as to harden the adhesive (400).
2. The method according to claim 1, wherein: In step a), a robot arm (500) for holding the primary optical device (100) is also provided, wherein the fixing device (150) includes at least one holding element (180), and the at least one holding element is configured to correspond to the robot arm (500), so that the robot arm (500) can engage with the at least one holding element (180) to hold the primary optical device (100), wherein, in step c), the robot arm (500) holds the primary optical device (100) by means of the holding element (180), and the robot arm (500) aligns the primary optical device (100).
3. The method according to claim 1 or 2, wherein: The curing light is UV light.
4. The method according to claim 3, wherein: The UV light is generated by a point-type UV light source.
5. The method according to any one of claims 1 to 4, wherein: The adhesive (400) is a UV adhesive.
6. The method according to any one of claims 1 to 5, wherein: The adhesive (400) is a mixed adhesive.
7. The method according to any one of claims 2 to 6, wherein: The robotic arm (500) includes a UV light source (510).
8. The method according to any one of claims 2 to 7, wherein: The robot arm (500) comprises a UV adhesive device for applying the UV adhesive (400) into the at least one fixing opening (210) in step b).
9. The method according to any one of claims 2 to 8, wherein: The primary optical device (100) comprises at least two retaining elements (180) which are arranged on opposite sides of the primary optical device (100).
10. The method according to any one of claims 2 to 9, wherein: At least one retaining element (180) is designed as a projection (160).
11. The method according to any one of claims 2 to 10, wherein: The at least one retaining element (180) and / or the protrusion (160) serve as a light guide for the curing light so as to guide the curing light from the light entry surface (170) to the light output portion (161) and out of the light output portion (161).
12. The method according to any one of claims 1 to 11, wherein: The at least one light source (300) is designed as an LED.
13. The method according to any one of claims 1 to 12, wherein: In a further step e), when the primary optical device (100) is in a final position on the substrate (200), additional adhesive is applied in the fixing opening (210) to further strengthen the fixing of the primary optical device (100) in the final position.