Toric Impact-Resistant Eyeglass Lenses for Wide Protective Coverage
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Solution Overview
Problem
Existing eyeglasses and goggles do not effectively balance a wide covering range with sufficient impact resistance and endurance, particularly when protecting against physical impacts and spattering objects, while maintaining comfort and vision.
Innovation Solution
Designing impact-resistant eyeglasses with a lens unit featuring curved areas bent at different curvatures along two linear directions, enhancing toughness and covering range by using attaching units with symmetrical impact-resistant lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the covering range of eyeglasses is increased to protect against more impacts and objects, then the protection scope is improved, but the impact resistance and toughness may be compromised
Solution Approach 1:
The patent applies curved surface design to the lens, specifically using a toric lens with different curvatures in different directions. The lens surface is bent with a curvature of 6-7 curves in one direction and 3-3.8 curves in another direction, creating a three-dimensional curved structure that simultaneously increases covering range and maintains impact resistance by distributing impact forces across the curved surface
2Strength
If the lens is made tougher to resist impacts, then the impact resistance is improved, but the covering range and field of vision may be reduced
Solution Approach 1:
The patent implements asymmetric curvature design where different regions of the lens have different curvature values. The lens has a first curvature of 6-7 curves in one direction and a second curvature of 3-3.8 curves in another direction, creating local variations in structural properties that optimize both toughness and covering range for different viewing directions
3Area of stationary object
If the curvature along horizontal direction is increased to expand side vision, then the covering range in inner and outer sides is improved, but the lens structure complexity increases
Solution Approach 1:
The patent uses a toric lens design with specific curvature values (6-7 curves in one direction, 3-3.8 curves in another direction) to achieve expanded side vision coverage while maintaining a manufacturable lens structure through precise mathematical definition of the curved surfaces
Data Source
AI summary
The present invention relates to impact-resistant eyeglasses with toric lens and an impact-resistant lens. The impact-resistant eyeglasses with toric lens comprise at least one attaching unit and a lens unit. The attaching unit comprises at least one attaching portion extending a predetermined length along with a first linear direction. The lens unit comprises at least one assembling portion and at least one impact-resistant lens fixed to the assembling portion. The impact-resistant lens is symmetrically assembled with the attaching unit to a symmetric line through the assembling unit. Each impact-resistant lens comprises at least one curved area extending along two linear directions respectively. The curved area is bent with different curvatures along the two linear directions. The curvature of the curved area along one of the linear directions falls within 6˜7 curve, and the curvature of the curved area along another linear direction falls within 3˜3.8 curve.