Rotatable LED Hood Merging Light Direction and Switching
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Solution Overview
Problem
Existing flush-mounted lighting solutions lack flexibility in light direction adjustment and require separate switches for on/off functionality, which limits design freedom and installation ease.
Innovation Solution
A flush-mounted LED light with a device base that includes a power pack/converter, a control/regulating device, and a connection unit for 230V power lines, featuring a rotatable light-guiding hood that serves as a rotary lever to adjust light direction and automatically switch the light on/off, utilizing a reed relay switch actuated by a permanent magnet or metal shield for magnetic bias cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate switch is used for on/off functionality, then the switching function is reliable, but the device complexity and installation difficulty increase
Solution Approach 1:
The patent combines the light-guiding hood (for optical function) with a rotary lever mechanism (for switching function) into a single integrated component. Rotating the hood performs two functions simultaneously: directing light and actuating the reed relay switch through magnetic interaction, thereby eliminating the need for a separate switch and reducing device complexity
Solution Approach 2:
The light-guiding hood is designed to serve dual purposes: it guides and directs the light output while simultaneously functioning as a rotary lever to control the on/off state of the illuminant. This multi-functionality reduces the number of separate components needed in the system
2Measurement precision
If a separate switch is used for on/off functionality, then the switching control is precise, but the ease of operation and installation are reduced
Solution Approach 1:
The patent merges the optical adjustment function (light direction) with the switching control function into a single rotary operation. The user rotates the light-guiding hood to achieve precise switching control through the magnetic reed relay, while simultaneously adjusting light direction, making the operation intuitive and simple
3Device complexity
If the light-guiding hood serves as a rotary lever for automatic switching, then the device complexity is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent replaces direct mechanical contact switching with a magnetic field-based reed relay switching mechanism. The rotary lever (light-guiding hood) actuates the reed relay magnetically without mechanical contact, reducing wear and improving reliability while maintaining simple device structure. This substitution allows for easier manufacturing compared to precision mechanical switches
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 adjustable light direction up to 360° and customizable on/off functionality without a separate switch, enhancing design flexibility and ease of integration with conventional installation devices, while ensuring electrical safety and reduced voltage exposure.
Implementation Method 1
a switch (7) designed as a reed relay, which can be actuated by means of a permanent magnet (15) attached to the rotatable light guide hood (13)
Implementation Method 2
the switch (7) can be magnetically biased by means of a fixed permanent magnet (8). This magnetic bias can be canceled by the permanent magnet (15) attached to the rotatable light guiding hood (13)
Implementation Method 3
This magnetic bias can also be eliminated by a metal shield (16) attached to the rotatable light guide hood (13)
Data Source
Figure 1~4
Figure 5~10
AI summary
The flush-mounted LED lamp (1) has base (3) with power supply, control unit, assembly board (4), LED (6) and rotatable central disk (12). The central disk is comprised of rotatable light guide hood (13) and light outlet (14). The switching ON and OFF of LED is automatically performed by positioning the rotatable light guide hood in pivoting position and preset rotary position, respectively.