Polymeric LED Luminaire Housing With Integrated Hinge and Sealing
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Solution Overview
Problem
Existing LED luminaires face challenges in providing a durable and efficient high luminous flux while managing heat generation and requiring secure, sealed housing structures for outdoor applications.
Innovation Solution
A luminaire design featuring a polymeric or plastic housing with a hinge mechanism and sealing structure, including a deformable gasket and locking features, to allow access and secure the housing portions without separate fasteners, utilizing a polymeric material for cost-effectiveness and thermal management through convection openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional multi-component hinge system is used to connect housing portions, then the housing can be opened for access, but the device complexity increases and manufacturing cost rises
Solution Approach 1:
The patent integrates the hinge functionality directly into the housing portions by forming pintles and knuckles as integral features of the polymeric housing material itself, eliminating the need for separate hinge components. This merging of the hinge function with the housing structure reduces device complexity while maintaining the ability to open and close the housing for access.
Solution Approach 2:
The housing portions serve multiple functions: they provide structural enclosure, thermal management pathways, and integrated hinge mechanisms for access. The polymeric material itself is designed to perform both structural and articulation functions, reducing the need for additional specialized components.
2Strength
If separate fasteners are used to secure housing portions, then the housing can be firmly closed, but the manufacturing cost and assembly complexity increase
Solution Approach 1:
The locking features are integrated directly into the housing portions as integral features of the polymeric material. Protrusions and recesses are molded as part of the housing itself, eliminating the need for separate fasteners, screws, or clips. This reduces both manufacturing steps and assembly complexity while maintaining secure connection strength.
3Reliability
If conventional sealing methods are used between housing portions, then the seal may not be sufficient for outdoor conditions, but adding complex sealing structures increases device complexity
Solution Approach 1:
The patent incorporates flexible sealing elements including gaskets and deformable sealing portions made from elastomeric or thermoplastic materials. These flexible components conform to the mating surfaces of the housing portions, creating effective seals against environmental elements without requiring complex multi-layer sealing systems.
Solution Approach 2:
The housing portions utilize composite construction combining rigid polymeric structural elements with flexible sealing materials. The integration of different material properties (rigid for structure, flexible for sealing) within the same housing assembly achieves reliable outdoor sealing while maintaining relatively simple overall structure.
4Ease of manufacture
If polymeric materials are used for housing portions, then manufacturing cost is reduced and thermal management is improved, but the structural strength may be insufficient compared to metal
Solution Approach 1:
The patent employs polymeric materials with enhanced mechanical properties through composite formulation or structural design. The housing portions are constructed from engineered plastics or polymeric composites that provide sufficient structural strength for outdoor luminaire applications while maintaining the manufacturing cost and thermal management advantages of polymeric materials over metal.
Data Source
AI summary
A luminaire has a first housing portion and a second housing portion formed of a polymeric material. A hinge pivotably connects the first housing portion to the second housing portion and includes a pintle formed as one-piece with one of the first and second housing portions and a knuckle formed as one-piece with the other one of the first and second housing portions. A sealing structure seals a compartment formed between the first housing portion and the second housing portion. The sealing structure includes a channel supported by one of the first and second housing portions and a frame supported in the channel. The frame supports a deformable gasket. A sealing member extends from the other one of the first and second housing portions where the sealing member extends into the channel and engages the gasket. A locking feature secures the first housing portion to the second housing portion.