Motor Vehicle Headlamp Primary Optics Holder Latching
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Solution Overview
Problem
Existing motor vehicle headlight lighting devices face challenges with complex geometries, as glass primary optics are unsuitable for stable light distribution, leading to light losses and misalignment issues when using light-emitting diodes, and plastics like silicone lack the strength of glass.
Innovation Solution
A lighting device with primary optics made from transparent, moldable plastics, such as silicone, and a holder design that incorporates latching elements and undercuts to securely attach the optics, minimizing light losses and ensuring precise positioning of light sources, using thermoplastic holders that shade stray light and have minimal contact with light guides to prevent misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If glass is used for primary optics, then rigidity and stability are improved, but manufacturing complexity increases for complex geometries
Solution Approach 1:
The patent changes the material parameter from glass to silicone rubber, which allows the primary optic to be manufactured using injection molding processes. This enables complex geometries to be produced easily while maintaining the necessary shape stability through the elastomeric properties and precise molding techniques.
Solution Approach 2:
The patent employs silicone rubber as a composite material that combines the necessary optical transparency with elastomeric properties. This material allows for both complex geometry manufacturing and shape stability, resolving the contradiction between manufacturing ease and shape stability.
2Ease of manufacture
If silicone is used for primary optics, then manufacturing ease for complex geometries is improved, but rigidity deteriorates
Solution Approach 1:
The patent incorporates locking elements and undercuts into the holder design before assembly. These features pre-establish mechanical interlocking that prevents displacement of the silicone primary optic, compensating for the material's lower rigidity and ensuring stable positioning without requiring additional fastening components.
Solution Approach 2:
The holder acts as an intermediary component that provides rigid support and precise positioning for the flexible silicone primary optic. The locking elements and undercuts in the holder create a stable mechanical interface that compensates for the silicone's elastomeric properties, ensuring both ease of manufacture and adequate rigidity.
3Stability of the object's composition
If additional mounting components are used to secure primary optics, then positioning stability is improved, but device complexity increases
Solution Approach 1:
The patent merges the mounting function directly into the holder by integrating locking elements and undercuts as inherent features of the holder structure. This eliminates the need for separate mounting components, reducing device complexity while maintaining positioning stability through the integrated mechanical interlocking features.
Solution Approach 2:
The holder's locking elements and undercuts create a self-securing mechanism where the primary optic automatically locks into position upon insertion. This self-service positioning system eliminates the need for additional mounting components or complex assembly procedures, reducing device complexity while ensuring stable positioning.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides stable and efficient light distribution with reduced light losses, enabling adaptive beam control and improved positioning of light sources, enhancing the overall performance of motor vehicle headlights.
Implementation Method 1
a primary optics (100) with a plurality of light guides (110), which are arranged to transmit light from the light sources (10) in a main radiation direction
Data Source
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AI summary
The invention relates to an illumination device for a motor vehicle headlight, said illumination device comprising the following: - multiple light sources (10) which are designed to emit light beams in a main emission direction, - a primary optical system (100) having multiple light-guiding elements (110), said light-guiding elements (110) being arranged in the main emission direction of the light sources (10) and each having a light entry face (120) into which the light beams of the light sources can be fed, and a light exit face (130), the light-guiding elements (110) opening into a common light exit face (130), and - a holder (200) which is designed to hold the light entry faces (120) of the light-guiding elements (110) in position in relation to the light sources (10), the holder (200) having at least one latching element (210) formed with a latching tab (220) to fasten the primary optical system (100), the latching tab (220) being designed to engage in an undercut (140) associated with the latching tab (220) and provided on the primary optical system (100).