Sliding Latch Eyewear Frame for Tool-Free Lens Replacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Eyewear frames with threaded fasteners face issues of requiring special tools for lens replacement and potential stripping due to frequent opening and closing, making them impractical for interchangeable lenses.
Innovation Solution
The eyewear frame employs a sliding joint or coupling sleeve that moves between extended and retracted positions to securely hold or release lenses, eliminating the need for special tools and preventing stripping, using interlocking recesses and protrusions, and a coupling sleeve with a tab that engages a notch on the lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded fasteners are used to join frame portions, then secure connection is achieved, but special tools are required and stripping occurs with frequent use
Solution Approach 1:
The frame is divided into separate portions (first frame portion and second frame portion) that can be independently moved relative to each other. The joint sleeve acts as a movable connector that can be easily engaged and disengaged without tools, allowing lens replacement while maintaining secure connection when closed.
Solution Approach 2:
The joint sleeve is designed to be slidingly movable along the temple arm, transitioning between engaged and disengaged states. This dynamic mechanism allows easy opening for lens replacement and secure closing for wear, eliminating the need for threaded fasteners while providing both ease of operation and connection strength.
2Adaptability or versatility
If threaded fasteners are used to allow lens replacement, then lens interchangeability is achieved, but fasteners are prone to stripping with frequent opening and closing
Solution Approach 1:
The connection mechanism is segmented into a joint sleeve and corresponding recesses/protrusions on frame portions. This allows the frame to be easily assembled and disassembled for lens replacement while distributing mechanical stress away from critical fastening points, preventing stripping even with frequent use.
Solution Approach 2:
The joint sleeve serves as an intermediary component between frame portions and lenses. It provides a durable, tool-free mechanism that can be repeatedly engaged and disengaged without stripping, while maintaining secure holding of interchangeable lenses.
3Ease of operation
If a sliding joint sleeve is used to hold lenses, then tool-free lens replacement is achieved, but secure engagement must be maintained
Solution Approach 1:
The joint sleeve features asymmetric geometry with a tab that fits into a corresponding notch on the lens, and convex/concave portions that interlock with frame portions. This asymmetric design ensures secure, tool-free engagement while preventing accidental disengagement during normal wear.
Solution Approach 2:
The joint sleeve is disposed over the temple arm and engages with recesses and protrusions on frame portions, creating a nested structure. The tab nests into the lens notch, and convex portions nest into concave portions, providing multiple levels of secure engagement that maintain lens holding strength while allowing easy sliding operation.
Data Source
AI summary
Eyewear for releasably receiving a lens has a joint sleeve for holding the lens in place.