Adjustable Light Fixture Rotational Axis Translation
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Solution Overview
Problem
Existing adjustable light fixtures face issues with stability and light clipping when trying to direct light at objects not directly beneath them, as they either protrude above the ceiling or shift the center of gravity, leading to tilting and interference with overhead structures.
Innovation Solution
An adjustable light fixture design featuring a base with sliding slots and projections that allow the mounting member to rotate and translate, maintaining the center of gravity's path orthogonal to the base, preventing tilting and allowing for directional light adjustment without clipping, using a combination of rotational and translational movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the mounting member rotates about its central longitudinal axis to direct light at angled objects, then the light direction is adjusted, but the mounting member protrudes above the ceiling requiring suspension clearance or recess installation
Solution Approach 1:
The mounting member's rotational axis is made movable rather than fixed, allowing the axis to translate as the mounting member rotates. This dynamic adjustment enables the light to be directed at angled objects without the mounting member protruding above the ceiling plane.
Solution Approach 2:
The position of the rotational axis changes (translates) as the mounting member rotates, altering the geometric parameters of the system. This parameter change allows the light direction to be adjusted while keeping the mounting member within the ceiling plane.
2Length of stationary object
If the mounting member swings below the base to avoid ceiling interference, then the ceiling clearance issue is resolved, but the center of gravity shifts causing the light fixture to tilt
Solution Approach 1:
The rotational axis moves dynamically with the mounting member during rotation, rather than being fixed at the base. This dynamic axis movement compensates for the center of gravity shifts, preventing the light fixture from tilting while allowing the mounting member to swing below the base.
3Length of stationary object
If the light fixture is installed in a recess to allow mounting member rotation, then ceiling clearance is provided, but light clipping occurs when the light source is positioned above the ceiling
Solution Approach 1:
The rotational axis translates as the mounting member rotates, ensuring that the light source remains positioned at or below the ceiling plane throughout the rotation range. This dynamic axis movement prevents light clipping while maintaining full illumination output.
Data Source
AI summary
An adjustable light fixture including a base and a mounting member configured to movably connect a light source to the base. The mounting member is configured to rotate about a rotational axis that moves relative to the base. The adjustably light fixture can be implemented as an overhead light fixture by connecting the base to a ceiling. Also provided is a method adjusting an overhead light fixture including rotating a mounting member and translating the mounting member relative to a base.