Screwless Eyewear Hinge With Hooked Tab And U-Spring
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Solution Overview
Problem
Conventional eyewear hinges require tools for removal and replacement, making it difficult to change or replace temples for aesthetic or functional reasons, and necessitating the purchase of multiple pairs for fashion variations.
Innovation Solution
A screwless hinge system utilizing a hooked tab and a u-spring for rotational coupling of temples to the front frame, allowing for easy removal and replacement without tools, featuring a hooked tab with a single hook and a u-spring with apertures for secure engagement and compression to facilitate temple rotation and interchangeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional hinges with screws are used, then the temple is securely attached to the front frame portion, but the removal and replacement of temples requires specialized tools and is difficult or cumbersome
Solution Approach 1:
The hinge is divided into separate functional components: a hooked tab attached to the front frame portion and a separate temple receiver on the temple. This segmentation allows the temple to be easily detached from the frame by simply removing the temple receiver from the hooked tab, eliminating the need for tools and complex screw mechanisms while maintaining secure attachment during use.
2Adaptability or versatility
If conventional hinges requiring tools are used, then the attachment is secure and stable, but replacing damaged temples or changing for fashion purposes is difficult
Solution Approach 1:
The hooked tab is pre-formed with a specific geometry that complements the temple receiver, creating a pre-engineered snap-fit connection. This preliminary design of the engagement geometry allows users to quickly replace temples by simply snapping the new temple receiver onto the hooked tab, eliminating the time-consuming process of using tools to remove and reinstall screw fasteners.
3Ease of operation
If a screwless hinge with hooked tab and u-spring is used, then tool-free removal and replacement is enabled, but the hinge mechanism requires precise configuration of hook opening orientation and spring positioning
Solution Approach 1:
The hooked tab features an asymmetric design with a single hook having an opening oriented in a specific direction (facing outward away from the bridge). This asymmetric geometry, combined with the u-spring positioned at specific locations with apertures, creates a one-way engagement mechanism that guides proper assembly while enabling easy removal. The asymmetric design simplifies manufacturing by providing clear orientation cues rather than requiring perfectly symmetric precision features.
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
Enables quick and tool-free removal and replacement of temples, allowing for easy customization and maintenance of eyewear, reducing the need for multiple pairs and simplifying the process of changing or replacing damaged components.
Implementation Method 1
The u-spring has a substantially U shape with an opening that is facing the outward direction in the installed configuration. The u-spring also has two apertures positioned to receive the hooked tab and allow for the single hook to project at least partially through in the installed configuration.
Data Source
AI summary
A screwless hinge system for connecting a temple to a front frame portion of eyewear includes a hooked tab with a single hook and a base. The hooked tab extends through the front frame portion and a u-spring until the base engages the frame. A temple receiver of a temple compresses the u-spring and engages the single hook, allowing for opening and closing of the temple and removal and replacement of the temple without tools.