Adjustable Light Module With Four-Bar Linkage
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Solution Overview
Problem
Recessed light fixtures lack the ability to adjust the direction of the light emitted, making it difficult to achieve desired lighting effects such as wall-wash or directed beams without visible hardware or wiring.
Innovation Solution
An adjustable light module with a housing and a light module body that can be moved between non-tilted, intermediate tilted, and fully-tilted positions using a four-bar linkage and frictional means, allowing for manual adjustment of the light direction while maintaining a constant vertical position of the peripheral edge, and featuring heat sink fins aligned at specific angles for optimal heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a recessed light fixture uses fixed lighting elements, then the installation is simple and the appearance is clean, but the ability to adjust light direction is lost
Solution Approach 1:
The lighting element is made dynamically adjustable through a tilt mechanism that allows the light module body to rotate between a non-tilted position (parallel to ceiling) and a tilted position (at an angle to ceiling), enabling flexible light direction control while maintaining a relatively simple overall fixture structure
Solution Approach 2:
The fixture is divided into separable components including a housing, a light module body containing the lighting element, and a tilt mechanism with four-bar linkage. This segmentation allows independent optimization of each component and simplifies installation and maintenance
2Adaptability or versatility
If a mechanical tilt mechanism is added to adjust light direction, then light direction control is enabled, but the visual cleanliness and sleek appearance may be compromised
Solution Approach 1:
The tilt mechanism components including the four-bar linkage and frictional means are nested within the housing structure, with the light module body integrated into the mechanism. This nesting conceals the mechanical elements behind the sleek exterior, maintaining visual cleanliness while enabling light direction adjustment
Solution Approach 2:
The housing and trim elements provide a smooth, continuous exterior surface that conceals the internal mechanical components. The peripheral flange and trim create a clean aesthetic appearance that hides the complexity of the tilt mechanism while allowing full functionality
3Ease of manufacture
If modular components are used for easy installation, then toolless mounting is achieved, but the precision of positioning and adjustment may be reduced
Solution Approach 1:
The frictional means automatically engages with the four-bar linkage to lock the light module body in its adjusted position without requiring external fastening or precise pre-positioning. The user simply adjusts the light direction and the frictional mechanism maintains the position, combining ease of adjustment with positioning precision
Solution Approach 2:
The four-bar linkage provides mechanical feedback that guides the light module body through a controlled range of motion, ensuring precise positioning at various tilt angles. The linkage geometry inherently limits the adjustment range and ensures accurate angular positioning while maintaining simple modular construction
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 users to adjust the light direction easily and maintain precise positioning, ensuring aesthetically pleasing and functional lighting effects without exposing electrical hardware, while maintaining a sleek appearance.
Implementation Method 1
movement of the light module body relative to the housing is limited at the non-tilted limit position and the fully-tilted limit position
Implementation Method 2
featuring heat sink fins aligned at specific angles for optimal heat dissipation
Data Source
AI summary
A lighting module for a recessed light fixture has a housing and a light module body movably coupled to the housing by a linkage. In an intermediate tilted position, an optical axis of the light module body is aligned at a first angle relative to a Y axis, and in a fully-tilted limit position, the optical axis is aligned at a second angle relative to the Y axis. Movement of the light module body relative to the housing includes rotation about a Z axis and translation parallel to X and Y axes. During movement of the light module body relative to the housing a first lateral section of a peripheral edge defining an opening of the light module body remains substantially parallel to the Z axis and maintains a substantially constant perpendicular distance from the X axis.