Interchangeable PVC Foil Insert for Safety Eyewear
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Solution Overview
Problem
Existing eyewear with interchangeable optical prescription lenses is costly to replace when damaged and does not provide adequate protection due to gaps between the frame and the wearer's orbital area, compromising safety.
Innovation Solution
An eyewear design featuring a polycarbonate frame with a removably secured PVC optical foil insert, which includes locking prongs and hinge gussets to securely attach the foil to the frame, ensuring maximum clearance and protection from scratches, and allowing for easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If optical prescription lenses are attached directly into the optical frame or onto the outer/inner protective lens, then the lenses are securely protected from damage, but the frame is pushed further away from the wearer's face creating gaps that compromise protection
Solution Approach 1:
The patent divides the optical system into separate components: a protective outer lens and an inner optical prescription lens held by a retaining ring. This segmentation allows the protective lens to remain close to the face while the optical lens is secured independently, eliminating gaps without compromising either protection or optical function.
Solution Approach 2:
The optical prescription lens is nested within the protective lens assembly, with the optical lens positioned inside the protective lens cavity and secured by a retaining ring. This nesting arrangement allows both lenses to work together in a compact configuration that maintains facial contact while protecting the optical lens.
2Adaptability or versatility
If interchangeable screw-in type single lenses are used, then replacement is possible, but they are expensive to replace when damaged and not easily removed and replaced
Solution Approach 1:
The patent employs a dynamic retaining ring mechanism that can be easily manipulated to release and reposition the optical lens. The retaining ring features a flexible or movable section that allows the lens to be inserted and removed with simple finger pressure, making replacement quick and easy compared to screw-in types.
Solution Approach 2:
The retaining ring acts as an intermediary component between the optical lens and the frame, providing a simple mechanical interface for easy insertion and removal. This intermediary mechanism eliminates the need for complex screw threads while ensuring secure holding during use.
3Reliability
If optical prescription lenses are made securely attached to prevent damage, then protection is improved, but replacement becomes difficult and time-consuming
Solution Approach 1:
The retaining ring is designed with dynamic characteristics, featuring a flexible portion that allows easy manual manipulation for lens removal. During normal use, the ring maintains secure holding force, but during replacement, the flexible section enables quick release with minimal effort, reducing replacement time while maintaining reliability.
Data Source
AI summary
The present invention relates to safety or sport or recreational eyewear with an interchangeable optical PVC foil inserts. The eyewear includes a polycarbonate frame configured to receive interchangeable PVC prescription foil inserts. The frame includes a central nose bridge portion, molded lenses, nose pads, first and second wrap around frame arms, first and second frame arm hinge gussets. Arm hinge gussets strengthen the frame hinge and locate the foil insert in position. Inner hinges securely attach and lock the foil insert into its correct location within the frame. The foil insert provides two inner foil radiuses for the fitting of prescription corrective lenses. Nose bridge and nose pads hooks are supplied to ensure correct central alignment of the optical foil insert. Foil gusset slots ensure correct alignment of the foil insert at the top and base of the frame arm hinge gussets.