Adjustable Lighting Device with Pivotal Heat Sink and Drive Screw
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Solution Overview
Problem
Modern lighting devices with LED components face challenges in maintaining optimal temperature and adjusting light direction, especially in thermally contained or poorly ventilated environments, where heat transfer is inhibited and directional adjustments are complicated.
Innovation Solution
A lighting device assembly featuring a heat sink member with a pivotally adjustable orientation, driven by a threaded drive screw mechanism, allowing for efficient heat dissipation and adjustable light direction through a support structure with pivotal joints and flanges, enabling both axial and rotational adjustments.
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 light emission direction can be adjusted, but heat transfer from the LED component becomes inefficient and temperature control becomes difficult
Solution Approach 1:
The lighting device is divided into separate functional modules: a heat sink assembly for thermal management, a moveable support structure for directional adjustment, and a drive mechanism for actuation. This segmentation allows the heat sink to remain thermally efficient while the support structure provides adjustability, resolving the contradiction between temperature control and direction adjustment.
Solution Approach 2:
A moveable support structure with pivotal joints acts as an intermediary between the heat sink assembly and the mounting surface. This intermediary allows the LED to maintain optimal thermal contact with the heat sink while enabling independent adjustment of light beam direction through the pivotal joints, decoupling thermal management from directional control.
2Adaptability or versatility
If the lighting device is mounted in an enclosed environment, then installation flexibility is improved, but heat transfer capability deteriorates
Solution Approach 1:
The device separates the mounting function from the thermal management function. The heat sink assembly is designed as an independent module with integrated mounting capabilities, allowing it to be installed in enclosed environments while maintaining effective heat transfer pathways through its dedicated thermal structure, thus resolving the conflict between mounting flexibility and heat dissipation.
Solution Approach 2:
The heat sink assembly incorporates localized thermal management features including fins and heat dissipation structures positioned at specific locations to maximize heat transfer efficiency even in enclosed mounting environments, while other parts of the device provide mounting flexibility.
3Measurement precision
If a threaded drive screw mechanism is used for adjustment, then adjustment precision is improved, but device complexity increases
Solution Approach 1:
The threaded drive screw mechanism is designed to be manually operated by the user without requiring external power sources, motors, or complex control systems. The user directly rotates the drive screw to adjust the pivotal joints, providing precise control through simple mechanical threading while minimizing overall device complexity by eliminating the need for powered actuation systems.
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
This solution effectively maintains the LED temperature below a threshold while allowing for precise adjustment of light direction, enhancing both thermal management and directional flexibility in various mounting configurations.
Implementation Method 1
the brightness of an LED light source is at least partially related to the speed in which heat can be transferred away from the LED component
Implementation Method 2
maintain the temperature of the LED under about 105° Celsius for improved or maximum light output and efficiency
Implementation Method 3
a threaded drive screw having a lengthwise drive screw axis and supported for rotation about the drive screw axis, with the drive screw axis being fixed relative to the first adjustment axis. The drive mechanism further includes a collar threaded to the drive screw to move linearly along the drive screw axis as the drive screw is rotated
Implementation Method 4
a support structure for supporting the heat sink member in a pivotally adjustable orientation about the first adjustment axis, to allow adjustment of the first direction
Data Source
AI summary
A lighting device assembly includes a light source attached to a heat sink member to emit light in a first direction. A support structure supports the heat sink member in a pivotally adjustable orientation about an adjustment axis, to allow adjustment of the first direction. A drive mechanism selectively drives the heat sink member to pivotally adjust the orientation of the heat sink member about the adjustment axis to change the first direction. The drive mechanism includes a drive screw having, a collar threaded to the drive screw to move linearly along the drive screw axis as the drive screw is rotated, and at least one strut to transfer linear movement of the collar to pivotal movement of the heat sink member.