Adjustable Lighting Device With Curved Guide And Elastic Bias
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Solution Overview
Problem
Lighting devices with moveable LED components face challenges in heat dissipation, leading to reduced brightness due to inefficient heat transfer, and adjustable lighting setups often obstruct light with fixed housing structures.
Innovation Solution
A lighting device assembly featuring a heat sink with a curved inner surface cavity, an optic assembly that pivots within the cavity, and an elastic member to maintain the optic's position against gravity, allowing for adjustable light direction while maintaining heat dissipation through a connected heat sink.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LED component is mounted on a moveable structure to adjust light beam direction, then the lighting device becomes adjustable, but heat transfer efficiency deteriorates
Solution Approach 1:
The device is divided into two independent parts: a stationary light source assembly with heat sink, and a moveable optic assembly. This segmentation allows the heat-generating LED to remain fixed for efficient heat transfer while the optic assembly moves independently to adjust light direction.
Solution Approach 2:
A curved guide surface acts as an intermediary between the stationary light source and the moveable optic assembly. The elastic member uses this curved surface as a mediator to apply bias force to the optic assembly, enabling smooth pivoting motion without direct mechanical connection to the light source.
2Temperature
If the light source is fixed to a fixture housing of substantial mass for heat dissipation, then heat transfer improves, but the ability to adjust light direction deteriorates
Solution Approach 1:
The fixture housing is segmented into a stationary light source assembly that provides heat dissipation and a separate moveable optic assembly that provides adjustability. The light source remains fixed to the heat sink in the housing while the optic assembly pivots independently on the curved guide surface.
3Adaptability or versatility
If a fixture head is made moveable to adjust light direction, then adaptability improves, but light beam obstruction deteriorates
Solution Approach 1:
The optic assembly pivots in a different spatial dimension (along a curved arc) rather than moving linearly. This dimensional change in motion path allows the optic to adjust light direction without the housing or bezel blocking the light beam path.
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
Enables efficient heat transfer and adjustable light direction without obstructing the light beam, improving the brightness and adjustability of the lighting device.
Implementation Method 1
heat may not be efficiently transferred from the LED component through the moveable structure
Implementation Method 2
An elastic member is arranged to impart a bias force on the optic assembly, to force the curved outer surface of the optic assembly against the curved inner surface of the first housing member
Data Source
AI summary
A lighting device assembly includes a heat sink, a light source attached to one end of the heat sink, an optic assembly to pivot an optic about the light source, and a housing member having a cavity in which at least a portion of the optic assembly is received and pivotally adjustable. An elastic member imparts a bias force on the optic assembly, to force an outer surface of the optic assembly against an inner surface of the housing member. The elastic member is held in a partially compressed state, to constantly impart the bias force on the optic assembly.