Articulating Friction Hinge for Lighting Device
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Solution Overview
Problem
Existing mountable lighting devices have limited positional freedom and hinges that tend to loosen over time, leading to failure.
Innovation Solution
A portable lighting device with an articulating friction hinge that allows for greater adjustability and stability, utilizing a deformable washer to provide spring force for secure positioning without relying on fasteners for friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ratcheting hinge with fastener is used to hold the lighting device in position, then the device can maintain a desired position, but the hinge tends to work itself loose over time and eventually fails
Solution Approach 1:
The patent removes the fastener (nut and bolt combination) from the hinge assembly entirely. The hinge relies on friction between the hinge knuckle and mounting surface to maintain position, eliminating the component that causes loosening over time. This extraction of the problematic fastener element directly resolves the contradiction between initial positioning stability and long-term durability.
Solution Approach 2:
The hinge design allows the friction interface to self-adjust and self-maintain the lighting device position without requiring external fasteners or adjustment mechanisms. The natural friction between surfaces provides both the positioning and locking function, making the system self-sufficient and eliminating wear from fastener loosening.
2Adaptability or versatility
If a ratcheting hinge is used to permit finite number of positions, then the structure is simple, but the user cannot achieve a desired continuous position for the lighting device
Solution Approach 1:
The patent replaces the mechanical ratcheting system with a friction-based system. Instead of discrete mechanical locking positions, the hinge uses continuous friction control between the knuckle and mounting surface to allow infinite positional adjustment while maintaining simplicity. This substitution eliminates the complex ratchet teeth and springs while achieving superior adaptability.
3Strength
If pressure is applied to the hinge by a fastener to hold the lighting device, then the device can be secured in position, but the fastener works itself loose over time
Solution Approach 1:
The patent completely removes the fastener element from the design. The holding force is generated directly by friction between the hinge knuckle and the mounting surface, eliminating the fastener that is prone to working loose. This extraction resolves the contradiction by replacing the unreliable fastener-based holding mechanism with a reliable friction-based system.
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 offers enhanced adjustability and maintains desired positions effectively, preventing the hinge from loosening and improving user convenience and safety by providing a secure and durable mounting solution.
Implementation Method 1
utilizing a deformable washer to provide spring force for secure positioning
Implementation Method 2
deformable washer to provide spring force
Implementation Method 3
articulating friction hinge that allows for greater adjustability and stability
Data Source
AI summary
A lighting device comprising an improved hinge assembly, and methods of assembly thereof, are disclosed.