Curved Eye Shield Window for Low-Distortion Welding Protection
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Solution Overview
Problem
Workers face inconvenience in having to change eye protection structures frequently due to varying welding conditions, such as different welding parts and spark intensities, leading to discomfort and inefficiency.
Innovation Solution
An eye protection structure with a window that includes a transmissive portion with distinct radii of curvature, thickness, and a rib structure, designed to minimize eye fatigue and distortion, and an opaque portion to block unwanted light and heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional flat or simple curved window is used, then the structure is simple and easy to manufacture, but the worker experiences eye fatigue and distortion when used for extended periods
Solution Approach 1:
The window employs a free-form curved surface design with varying radii of curvature in different directions. Specifically, the window has a first radius of curvature in the horizontal direction and a second radius of curvature in the vertical direction, where these radii vary at different positions to optimize optical performance and minimize eye fatigue while maintaining protective functionality
Solution Approach 2:
The window structure implements local quality by having different curvature characteristics at different locations. The radii of curvature are specifically designed to vary across the window surface, with the first and second radii having different values at different positions to address specific optical requirements in different regions while maintaining overall structural integrity
2Reliability
If the window thickness is uniform, then the manufacturing process is simpler, but the optical performance and comfort for extended wear are reduced
Solution Approach 1:
The window implements non-uniform thickness distribution as a local quality feature, where the thickness varies at different positions across the window surface. This variable thickness design is integrated with the free-form curvature to optimize optical performance and reduce eye fatigue, while the manufacturing complexity is managed through integrated molding processes
3Adaptability or versatility
If the eye protection structure is fixed in shape, then the device is simpler, but the worker must change structures frequently for different welding conditions
Solution Approach 1:
The eye protection structure achieves universality by designing a free-form window that can be adapted to various welding conditions and applications. The optimized curvature and thickness distribution enable the single window design to serve multiple protective functions across different welding scenarios, reducing the need for multiple specialized structures
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 structure provides effective protection against bright lights and heat, reducing eye fatigue and maintaining clear vision over extended periods.
Implementation Method 1
a first radius of curvature of an outer surface of the transmissive portion and a second radius of curvature of an inner surface of the transmissive portion are different from each other
Implementation Method 2
an opaque portion having a smaller transmittance than the transmissive portion
Data Source
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AI summary
An embodiment of the present disclosure discloses an eye protection structure for protecting a worker, the eye protection structure including a window convex outward to cover both eyes of the worker, wherein the window includes a transmissive portion, the transmissive portion includes an inner surface facing the worker's face and an outer surface opposite to the inner surface, a first radius of curvature of the outer surface of the transmissive portion and a second radius of curvature of the inner surface of the transmissive portion are different from each other, and a thickness of a central portion of the transmissive portion is greater than a thickness of an edge portion of the transmissive portion.