Lens Trim Attachment Structure for Solid State Downlights
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional solid state downlights face challenges with visible mechanical attachment elements compromising aesthetics and lighting performance, and undesirable light piping due to complex lens structures and diffuser films, which require improved trim attachment structures that are tool-free, removable, and seamless with the lens.
Innovation Solution
A lens structure with integrated trim retaining elements and a trim structure featuring lens engaging elements that allow for tool-less, rotatable attachment without blocking light, fabricated using conventional manufacturing techniques to ensure seamless integration and reduced production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional attachment processes (screws, heat staking, adhesives, or snaps) are used to attach the trim structure, then the trim structure can be securely attached to the housing, but visible mechanical attachment elements compromise aesthetic appearance and may block or obscure portions of the lens
Solution Approach 1:
The patent removes visible mechanical attachment elements from the final assembly by integrating the trim retention mechanism into the lens structure itself. The lens includes molded-in retention features (such as ribs, lugs, or interference-fit structures) that engage with corresponding features on the trim structure, eliminating the need for separate screws, adhesives, or snaps that would be visible or obstruct light.
Solution Approach 2:
The patent combines the trim retention function with the lens structure by integrating retention features directly into the lens molding process. This merging of functions allows the lens to simultaneously serve its optical purpose and its structural role in securing the trim, thereby eliminating visible attachment hardware while maintaining secure attachment.
2Ease of operation
If the trim structure is made removable from below the downlight, then installation and maintenance become easier, but a non-illuminated area around the lens becomes visible or attachment elements block light transmission
Solution Approach 1:
The patent transitions the attachment mechanism from a radial or lateral engagement (which would require visible elements around the lens periphery) to a vertical engagement dimension. The trim structure is designed to be attached or removed by pushing or pulling from below, with retention features that engage vertically with the lens structure, allowing full illumination of the lens area while maintaining tool-free removability.
3Manufacturing precision
If complex lens structures with diffuser films are used for LED color mixing, then color uniformity is improved, but vertically arranged structural elements cause light piping and undesirable color separation
Solution Approach 1:
The patent addresses light piping caused by vertical structural elements by redesigning the trim retention features to follow the optical path more closely. The retention elements are positioned and shaped to work with the existing lens and diffuser structure, converting potential light-piping pathways into controlled optical boundaries that maintain color uniformity while preventing unwanted light leakage.
Data Source
AI summary
A lighting device such as a solid state downlight includes a lens structure with at least one integrally formed trim retaining element, and a trim structure including at least one lens structure engaging element, wherein the at least one lens structure engaging element is arranged to removably engage the least one trim retaining element, such as by rotating the trim structure. A generally cylindrical portion of the trim structure may be arranged to surround a central portion of the lens structure, thereby reducing or eliminating light piping and eliminating visible attachment elements for the trim structure.