Angle-Controlled Light Emitting Device for Ladders
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Solution Overview
Problem
Existing light emitting devices on extension ladders require manual control and are inconvenient due to the need for cables, making it difficult to use the ladder in dark environments and leading to potential power waste from forgotten devices.
Innovation Solution
A light emitting device that turns on and off based on the placement angle of the object it is attached to, using a conductive element with a conductor that moves between conducting and disconnecting positions within a passage, eliminating the need for additional wires and manual control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light emitting device is attached to the extension ladder, then the visibility of the ladder in dark environments is improved, but the operation of the ladder is affected by the cable and manual control is required
Solution Approach 1:
The patent removes the cable connection from the system by using a contactless power transmission mechanism. The power supply element and light emitting element are integrated into the ladder structure, eliminating the need for external cables that interfere with ladder operation. The light can be activated through angle-sensitive switches that detect the ladder's position without requiring manual intervention or cable connections.
Solution Approach 2:
The light emitting device automatically activates and deactivates based on the ladder's placement angle. The angle-sensitive switch detects when the ladder is in use (extended position) and automatically turns on the light, then automatically turns it off when the ladder is stored. This self-regulating mechanism eliminates the need for manual control while maintaining safety and visibility.
2Ease of operation
If manual control is used for the light emitting device, then the device can be turned on and off, but power waste occurs when the user forgets to turn off the device
Solution Approach 1:
The patent incorporates an angle-sensitive switch that provides automatic feedback based on the ladder's position. When the ladder is extended (in use), the switch detects this position and automatically activates the light. When the ladder is retracted (stored), the switch automatically deactivates the light. This feedback mechanism ensures the light is only on when needed, preventing energy waste from forgotten switches.
3Use of energy by moving object
If additional wires are used for power supply, then the light emitting device can be powered, but the wires affect the convenience of usage of the object
Solution Approach 1:
The patent eliminates the need for additional wires by integrating the power supply element directly into the ladder structure. The power transmission is achieved through a contactless mechanism using the ladder's own structural components as conductive paths, removing the interference of external wires while maintaining power supply functionality.
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
The device provides convenient control and prevents power waste by automatically turning on and off with the object's angle, ensuring the light emitting element is only active when needed, enhancing usability and safety, especially in dark conditions.
Implementation Method 1
The tilt of the shell element changes the placement angle thereof, thereby causing the movement of the conductor inside the passage between a conducting position and a disconnecting position
Data Source
AI summary
A light emitting device controlled by placement angle thereof includes a housing space disposed inside a shell element, wherein a light emitting element, a power supply element, and a conductive element are disposed in the housing space. The conductive element has a passage having a conductor therein. By a tilt of the shell element, a placement angle thereof is changed, whereby the conductor moves inside the passage between a conducting position and a disconnecting position. The wire set between the light emitting element and the power supply element is conductive when the conductor is at the conducting position, and is not conductive when the conductor is at the disconnecting position. Thus, the light emitting element is able to be controlled by changing the placement angle of an object to which the light emitting device attached, thereby achieving the convenience for usage.