US 12,140,285 B2
Method for fastening a cover plate for a motor vehicle headlamp to a motor vehicle headlamp housing
Martin Artner, Maria Tafler (AT); Markus Bemmerl, Loosdorf (AT); and Markus Huber, Neumarkt an der Ybbs (AT)
Assigned to ZKW Group GmbH, Wieselburg (AT)
Appl. No. 18/278,906
Filed by ZKW Group GmbH, Wieselburg (AT)
PCT Filed Jan. 24, 2022, PCT No. PCT/EP2022/051478
§ 371(c)(1), (2) Date Aug. 25, 2023,
PCT Pub. No. WO2022/179777, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 21159583 (EP), filed on Feb. 26, 2021.
Prior Publication US 2024/0133533 A1, Apr. 25, 2024
Prior Publication US 2024/0230050 A9, Jul. 11, 2024
Int. Cl. F21S 41/29 (2018.01); F21S 41/20 (2018.01)
CPC F21S 41/29 (2018.01) [F21S 41/28 (2018.01); F21S 41/2805 (2024.05)] 3 Claims
OG exemplary drawing
 
1. A method for attaching a lens (100) for a motor vehicle headlight (10) to a motor vehicle headlight housing (200), comprising the following steps in chronological order:
a. providing a motor vehicle headlight housing (200), wherein the following is arranged in the motor vehicle headlight housing (200):
a first light module (210), which helps produce a first light distribution,
a second light module (220), which helps produce a second light distribution,
a screen (230), which is arranged between the first light module and the second light module (210, 220), wherein the screen (230) is arranged in such a manner that light emitted by one of the light modules (210, 220) is prevented from directly entering another light module,
a holding body, on which the first and second light modules (210, 220) and the screen (230) are arranged, wherein the holding body, the first and the second light modules (210, 220), and the screen (230) form an assembly, and wherein the assembly in the motor vehicle headlight housing (200) can be moved into a mounting position (P1) and into an end position (P2) that is different from the mounting position (P1), and
providing a lens (100), which has a first projection section (110) and a second projection section (120), which first and second projection sections (110, 120) are at least partially translucent, wherein the first projection section (110) is associated with the first light module (210) and in combination with the first light module (210) is designed to produce the first light distribution, and wherein the second projection section (120) is associated with the second light module (220) and in combination with the second light module (220) is designed to produce the second light distribution,
wherein the lens (100) has an opaque section (130), which is arranged between the first and second projection section (110, 120) and is designed to optically and spatially separate the first and second projection section (110, 120) from one another such that the light entering a projection section is prevented from entering the other projection section;
b. transferring the assembly into the mounting position (P1) with respect to the motor vehicle headlight housing (200), wherein in the mounting position (P1), the assembly is pre-positioned in such a way that the screen (230) is free from mechanical contact with the opaque section (130) of the lens (100) during the subsequent fixing of the lens (100) in a fixing position to the motor vehicle headlight housing (200) in accordance with step c);
c. transferring the lens (100) onto the motor vehicle headlight housing (200) in the fixing position and subsequently fixing the lens (100) to the motor vehicle headlight housing (200) by means of vibration welding; and
d. transferring the assembly into the end position (P2), wherein in the end position (P2), the assembly is arranged in such a manner that the screen (230) extends continuously to the opaque section (130) and is in mechanical contact with the opaque section (130) of the lens such that light from one light module is prevented from entering a projection section (110, 120) of the lens (100) associated with the other light module.