Pathway Light Fixture Segmented Lens Assembly
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Solution Overview
Problem
Current outdoor pathway lighting fixtures are prone to dirt buildup and corrosion, leading to reduced light output and aesthetic issues, and require costly and aesthetically disruptive replacement of entire fixtures for maintenance or design changes.
Innovation Solution
A pathway light fixture design featuring a moisture-proof seal with easily replaceable components, including a lens assembly and hood assembly with O-ring seals, allowing for individual part replacement without disassembling the entire fixture, and enabling changes in appearance without replacing the entire fixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens is glued to the hood to create a moisture-proof seal, then the fixture is protected from moisture and contaminants, but the entire hood/lens assembly must be replaced if the lens breaks or cracks
Solution Approach 1:
The fixture is divided into separate replaceable modules: the lens assembly and the hood assembly are detached from each other, allowing individual replacement. The lens assembly includes the lens, socket, and support structure as one replaceable unit, while the hood remains separate. This segmentation enables the lens to be replaced without replacing the entire hood/lens assembly, resolving the contradiction between maintaining a moisture-proof seal and enabling easy repair.
Solution Approach 2:
A retaining ring or retaining mechanism serves as an intermediary element that connects the lens assembly to the hood assembly. This intermediary component allows for easy attachment and detachment of the lens assembly from the hood, enabling maintenance and replacement operations while maintaining the moisture-proof seal during normal operation.
2Reliability
If the entire fixture is replaced to update appearance or fix issues, then the lighting system remains functional, but the cost and effort increase significantly
Solution Approach 1:
The fixture is segmented into modular components (lens assembly, hood assembly, mounting bracket) that can be replaced independently. This allows selective replacement of only the problematic or aesthetically undesirable components rather than the entire fixture, significantly reducing replacement cost and effort while maintaining functionality.
Solution Approach 2:
The design enables selective discarding of worn or damaged components (such as the lens assembly) while recovering and retaining functional components (such as the hood and mounting structure). This approach reduces waste and lowers the overall cost of maintenance compared to replacing the entire fixture.
3Object-affected harmful factors
If the lens is sealed to the hood, then moisture and contaminants are blocked, but the lens cannot be easily accessed for replacement or maintenance
Solution Approach 1:
The lens assembly is segmented as a separate, detachable module from the hood assembly. This segmentation allows the lens to be easily accessed, removed, and replaced by simply detaching the lens assembly from the hood, while still maintaining a moisture-proof seal during normal operation. The separate mounting mechanism enables maintenance operations without compromising the protective seal.
Solution Approach 2:
The mounting mechanism transitions from a static sealed connection to a dynamic detachable connection. The lens assembly can be easily attached and detached from the hood assembly through a simple operation (such as releasing a retaining ring), providing dynamic accessibility for maintenance while maintaining a sealed protective environment during normal operation.
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 design provides a cost-effective and aesthetically flexible solution by maintaining a watertight seal and allowing for individual component replacement, extending the fixture's lifespan and enabling updates to match changing landscape or building designs without the need for full system replacement.
Implementation Method 1
A O-ring seal 320 is disposed between the reflector hood 210 and the diffuser lens 310, forming a water-tight seal
Implementation Method 2
the inner surface of the cowl acts as a reflector to optimize the amount of light directed toward the desired target area
Data Source
AI summary
A light fixture for use in low voltage outdoor lighting systems includes a lens assembly with a diffuser lens disposed on top of a lens support, a reflector hood and a mushroom-shaped reflector retaining cap removably mounted on top of the lens assembly. A socket and lamp extend through an opening in the lens support. The radial center of the hood has a flattened area that sits level on top of the cylindrical lens and has an opening through which a base portion of the retaining cap is inserted. A recess in the top of the lens has an opening at its bottom for receiving the base of the retainer cap which is attached with a fastener inserted through the top of the lens. An O-ring seals the lens to the lower surface of the hood and the lens and lens support are sealed to provide a water-resistant seal around the lamp. The lens support is attached to the top of a mounting post.