Injection-Molded Polymer Housing for Recessed Lighting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional recessed lighting systems face challenges due to housing assemblies made from sheet metal, which are costly to produce, limited in structural complexity, and often require additional processing steps. Additionally, these systems are typically designed for single installation modes and may not meet safety standards for confined spaces.
Innovation Solution
The development of a polymer housing assembly for recessed lighting systems, featuring integrally formed cable routing features, mounting features for multiple installation modes, and alignment features. This polymer housing is fabricated using injection molding, allowing for complex structural features and reduced material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If sheet metal is used to form housing assemblies, then structural strength is improved, but manufacturing cost increases and manufacturing complexity increases
Solution Approach 1:
The patent changes the material parameter from sheet metal to polymer, specifically using injection-molded polymer housing assemblies. This material substitution maintains structural strength while significantly reducing manufacturing cost and complexity, as polymer injection molding allows for complex geometries to be formed in a single process step without the additional forming and assembly operations required for sheet metal
Solution Approach 2:
The patent employs polymer composite materials that provide both structural strength and ease of manufacture. The injection-molded polymer housing can incorporate reinforcement fibers or design features that maintain mechanical strength while benefiting from the cost-effectiveness and design flexibility of polymer processing
2Strength
If sheet metal is used to form housing assemblies, then structural strength is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple manufacturing operations into a single injection molding process. The housing assembly is formed as one integrated component with all necessary features (mounting tabs, cable access openings, structural ribs) incorporated during the single molding cycle, eliminating the multiple forming, cutting, and assembly steps required for sheet metal construction
Solution Approach 2:
The patent changes the manufacturing process parameter from incremental sheet metal forming to single-step polymer injection molding. This process parameter change enables complex three-dimensional geometries to be produced directly without sequential operations, significantly reducing manufacturing complexity
3Ease of operation
If conventional housing assemblies are designed, then single installation mode is achieved, but adaptability decreases
Solution Approach 1:
The patent designs the polymer housing assembly with universal mounting capabilities that accommodate multiple installation modes. The housing includes integrated mounting features such as tabs and attachment points that can be configured for surface mounting, recessed installation, or alternative mounting configurations, allowing the same housing design to serve multiple installation purposes without requiring separate specialized components
4Ease of manufacture
If polymer housing is used instead of sheet metal, then manufacturing cost is reduced, but structural strength may decrease
Solution Approach 1:
The patent changes the material parameter from metal to polymer, selecting specific polymer compositions and molding parameters that optimize both cost and structural performance. The injection molding process parameters (temperature, pressure, cooling rate) are controlled to produce a polymer housing with sufficient structural strength for the application while maintaining the cost advantages of polymer processing
Data Source
AI summary
A housing assembly for a recessed lighting system includes a housing with integrally formed cable routing features, mounting features, and alignment features. The integration of multiple features into the housing is enabled by forming the housing from a polymer using an injection molding process instead of sheet metal. For a new construction installation, the housing includes integrally formed bar hanger holders to support and guide bar hangers for installation onto two or more support structures, nail-in features for installation onto a single support structure, and one or more alignment features to position the housing against the single support structure when the nail-in features are used for installation. For a remodel installation, the housing includes a flange to abut a bottom surface of a ceiling and one or more spring clips mounted to the housing to abut a top surface of the ceiling.