Expandable Eyewear with Adjustable Strap and Snap Bridge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing eyewear designs with snap-together bridge features fail to accommodate users with heads that are wider than average, leading to inadvertent detachment of lenses due to the lack of adjustment along the head's width axis, limiting their usability.
Innovation Solution
Incorporating a telescoping segment within the arc-shaped base of the U-shaped strap allows for adjustable spacing between the strap's legs, enabling the eyewear to fit a wider range of head sizes by telescoping within the strap's arc-shaped base, preventing lens separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the strap is made rigid to maintain its shape, then the lens positioning stability is improved, but the adaptability to different head widths deteriorates
Solution Approach 1:
The strap incorporates a telescoping segment that allows dynamic adjustment of length. The segment can be extended or retracted to accommodate different head widths, transforming the strap from a static rigid structure to a dynamic adjustable one. This resolves the contradiction by enabling the strap to maintain rigidity for stability while adapting to various head dimensions.
Solution Approach 2:
The strap is divided into multiple segments including a telescoping segment with movable parts. This segmentation allows the strap to adjust its overall length while maintaining structural integrity. The telescoping mechanism enables the strap to be both rigid enough for stable lens positioning and flexible enough to adapt to different head widths.
2Ease of operation
If the connectors are made instantly separable for easy putting on and taking off, then the ease of operation is improved, but the reliability of lens connection deteriorates
Solution Approach 1:
The connectors are designed with magnetic attraction that automatically aligns and secures the lenses together without requiring manual intervention. The magnetic force provides self-aligning and self-securing functionality, enabling easy putting on and taking off while maintaining reliable connection. The magnets in the connectors naturally draw the lenses together and hold them in place.
Solution Approach 2:
The mechanical connection system is replaced with a magnetic connection system. Instead of requiring complex mechanical fasteners or manual latching mechanisms, simple magnetic connectors are used to achieve both ease of operation and reliable connection. The magnetic force provides the necessary holding strength while allowing for simple separation when needed.
Data Source
Figure 1~3
Figure 4A~5
AI summary
The present eyewear includes a pair of lenses, a pair of releaseable connectors connected to respective inner ends of the lenses, a pair of temples pivotally connected to respective outer ends of the lenses and a rigid strap connected between rear ends of the temples. The strap is generally U-shaped having substantially parallel legs connected to an arc-shaped base, the substantially parallel legs being connected to rear ends of the temples and when worn, the arc-shaped base extends along the back of a user's head. The strap at its U-shaped base is provided with a telescoping segment for selectively altering the length of the arc-shaped base for altering the spacing between the strap's substantially parallel legs to adjust the strap for varying widths of a user 's head. The inner ends of the lenses are releaseably secured together by connectors. In use, the lenses are separated from each other and pivoted outwardly, the strap wrapped around the back of a user's head and adjusted for size. The lenses are then pivoted towards each other and secured together in front of the user's eyes. The lenses are instantly separable for easily putting on or taking off the eyewear, but they are instantly connectable together for a secure and accurate fit.