Tool-less LED Light Engine Module with Latch Mechanism

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Solution Overview

Problem

LED-based light fixtures for large area applications face challenges in meeting lighting requirements due to the need for frequent replacement of components, as they do not easily allow for quick upgrades or maintenance without tools, unlike high-intensity discharge lamps which have a single light source.

Innovation Solution

A tool-less light fixture design with a modular light engine module that includes a lens module with refractor lens elements, allowing for easy replacement and upgrade of LED light sources, featuring a latch system for secure engagement and disengagement within the housing, ensuring compliance with international lighting standards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If LED-based fixtures use multiple light sources to meet lighting requirements, then lighting efficiency and coverage are improved, but component replacement complexity increases

Engineering Contradiction:
Improvelighting efficiencyVSAvoidcomponent replacement complexity
Core Design Contradiction:
Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent divides the light engine into a modular assembly containing multiple LED light sources, lens elements, and mounting structures that can be replaced as a single unit. This segmentation allows the complex multi-component light engine to be handled and replaced as one module, resolving the contradiction by maintaining multiple light sources for efficiency while simplifying replacement through modularization.

Inventive Principle:
Principle #1Segmentation

2Duration of action of stationary object

If traditional light fixtures require tools for component replacement, then structural security is improved, but maintenance time increases

Engineering Contradiction:
Improvemaintenance timeVSAvoidcomponent replacement ease
Core Design Contradiction:
Duration of action of stationary objectVSEase of operation

Solution Approach 1:

The patent extracts the light engine module from the fixture housing as a separable unit with its own integrated mounting and securing mechanisms. The module can be removed and installed without requiring external tools, as it includes self-contained fastening features that engage directly with the fixture housing. This extraction resolves the contradiction by enabling tool-free replacement while maintaining secure installation.

Inventive Principle:
Principle #2Taking out (Extraction)

3Reliability

If light engine modules are designed for secure mounting, then structural stability is improved, but replacement difficulty increases

Engineering Contradiction:
Improvestructural stabilityVSAvoidreplacement difficulty
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The patent employs a dynamic latch mechanism that transitions between locked and unlocked states to secure the light engine module. The latch can be easily actuated to release the module for replacement, yet provides firm mechanical retention during normal operation. This dynamic fastening system resolves the contradiction by providing both structural stability during use and ease of replacement during maintenance.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS9759409B2Light emitting diode (LED) lighting fixture having tool-less light engine module
Publication Date: 2017.09.12 LED ROADWAY LIGHTING
  • US9759409B2 patent drawing
  • US9759409B2 patent drawing
  • US9759409B2 patent drawing

AI summary

A light fixture is provided. The light fixture contains a light engine module having a printed circuit board with a plurality of light sources and a lens module having a plurality of lens elements for the plurality of light sources, a housing for the light engine module, and a latch engaged with the housing, the latch locking and unlocking the lens light engine module with the housing.