Ceiling Light Module Pull-Down Assembly for Extension and Rotation
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Solution Overview
Problem
There is a need for lighting fixtures that can be extended and rotated from a ceiling to direct light into different directions while being capable of being retracted back into the ceiling, with a housing to accommodate such assemblies.
Innovation Solution
A pull-down-assembly with a linear-extension-subassembly allows a can to be extended downwards and rotated, housed in a bracket that attaches to external structures, and can be retracted, with a linkage-arm enabling rotation and a hemispherical ball and socket mechanism for stopping at various positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lighting fixture is installed above the ceiling in a fixed position, then the installation is simple and stable, but the lighting direction cannot be adjusted to different areas
Solution Approach 1:
The lighting fixture is designed with a dynamic pull-down assembly that allows the can to transition from a fixed retracted position above the ceiling to an extended position below the ceiling. The linear extension subassembly with linkage arms enables the can to be pulled down along a defined path, transforming the static fixture into a dynamically adjustable system that can redirect light to different areas while maintaining structural integrity
Solution Approach 2:
The assembly is divided into separate functional components: a bracket attached to the ceiling structure, a linear extension subassembly with linkage arms, and the can containing the lighting module. This segmentation allows each component to perform its specific function independently while working together as a unified system, enabling directional adjustment without requiring complete structural redesign
2Adaptability or versatility
If a pull-down mechanism is added to allow extension and rotation, then lighting direction flexibility is improved, but the device complexity increases
Solution Approach 1:
The linear extension capability and rotation capability are merged into a single integrated pull-down assembly. The linkage arms connect the linear extension subassembly to the can, allowing both extension and rotation to occur through a unified mechanical system rather than separate mechanisms, thereby reducing overall complexity while maintaining full functionality
Solution Approach 2:
The linkage arms serve as intermediary elements that translate the linear motion from the extension subassembly into the combined extension and rotation motion of the can. This intermediary mechanism simplifies the overall system by providing a mechanical bridge that automatically coordinates the movement without requiring complex control systems
3Strength
If a housing is added to accommodate the pull-down assembly, then structural support and stability are improved, but the installation space requirement increases
Solution Approach 1:
The pull-down assembly components are nested within a compact housing structure that attaches to the ceiling. The bracket, linear extension subassembly, and linkage arms are arranged in a space-efficient configuration that minimizes the housing volume while providing sufficient structural support for the extension and rotation operations
Data Source
AI summary
A pull-down-assembly is usable in lighting applications. A can of the pull-down-assembly may hold a lighting-module that is configured to emit light. The can, of the pull-down-assembly, is extendable downwards in a linear fashion from a bracket, of the pull-down-assembly, via a linear-extension-subassembly of the pull-down-assembly. A linkage-arm, of the linear-extension-subassembly, permits the can to also be rotated. The bracket is attachable to a structure that is separate and external to the pull-down-assembly, such as, but not limited to, a housing (enclosure), a hangar-bar, a joist and/or a stud. The pull-down-assembly permits the can (and its lighting-module) to be extended downwards into an extended configuration and/or rotated or pushed back upwards into a retracted configuration.