Lighting Fixture Door Assembly Frameless Refractor Retention
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Solution Overview
Problem
Traditional door assemblies for lighting fixtures are aesthetically compromised due to visible metal frames or translucent plastic frame members, which detract from the appearance by creating dark lines or areas, affecting the overall visual appeal of the fixture.
Innovation Solution
A door assembly design featuring a frame defined by two frame sides and two frame ends with a diffuser panel spanning the opening and a refractor extending along the length, where the refractor is retained at its ends through apertures in the end plates, and brackets help secure the diffuser and refractor in place, eliminating visible frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal frames are used to retain the refractor, then the refractor is securely retained, but the frames are visible and create dark lines that detract from the appearance
Solution Approach 1:
The patent removes the visible metal frame structure from the door assembly. Instead of using traditional metal frames that extend down the middle, the invention extracts this element and replaces it with a frameless design where the refractor is retained through apertures in end plates, eliminating the dark lines and improving aesthetic appearance.
Solution Approach 2:
The patent introduces end plates with apertures as intermediary elements to retain the refractor. These end plates serve as mediators between the refractor and the door frame, providing secure retention through the aperture structure while maintaining a clean, frameless appearance without visible dark lines.
2Reliability
If translucent plastic frame members are used to substitute metal frames, then the refractor is retained, but dark areas are created that extend down the length of the fixture
Solution Approach 1:
The patent removes the translucent plastic frame members entirely, extracting this element from the design. The refractor is retained through apertures in end plates instead, eliminating the dark areas that would extend down the fixture and improving the overall aesthetic appearance.
3Shape
If a frameless design is used to improve appearance, then aesthetic appeal is enhanced, but the diffuser and refractor may not be securely retained
Solution Approach 1:
The patent introduces end plates with apertures as intermediary retention elements. These end plates provide secure mechanical retention for both the diffuser and refractor components while maintaining the frameless aesthetic appearance. The apertures act as mediators that enable secure attachment without visible frames.
Solution Approach 2:
The refractor and diffuser components are nested within the door frame structure and retained through the aperture system. The components are positioned and secured within the frame opening, with the refractor extending along the length and the diffuser panel spanning the opening, creating a nested arrangement that maintains both appearance and retention.
Data Source
AI summary
A door assembly for a lighting fixture. Embodiments of the door assembly include a door frame defined by two frame sides and two frame ends that define a frame opening. A diffuser panel is positioned within the door frame to span the frame opening and a refractor extends along the length of the door frame. The refractor is retained on the door assembly at its ends. More specifically, in some embodiments an aperture having the profile of the refractor is provided in the end plate on each frame end. The ends of the refractor are inserted into the apertures of the end plates to retain the refractor on the door assembly by its ends.