Hidden Pivot Structure for Eyeglass Temples

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Solution Overview

Problem

Conventional eyeglass structures using screws for assembly are inconvenient and material-intensive, and screwless designs with engaging studs and holes often lose pivot fixing function when temples are unfolded beyond a limit, while surface coating issues can clog stop grooves, damaging stoppers and affecting appearance.

Innovation Solution

A hidden pivot structure featuring engaging blocks and recesses on the frame and temples, where the blocks engage in recesses when temples are unfolded, providing stable positioning without visible protrusions, allowing for easy assembly and surface coating without clogging, and maintaining aesthetic appeal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If engaging studs and holes are used to assemble temples without screws, then assembly convenience is improved, but the pivot fixing function is lost when temples are unfolded beyond a limit

Engineering Contradiction:

Improveassembly convenienceVSAvoidpivot fixing function

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The pivot portion is divided into multiple functional elements: engaging studs, engaging holes, and stop blocks with stop grooves. This segmentation allows each component to perform its specific function - the engaging studs and holes provide assembly convenience while the stop blocks prevent excessive unfolding, thus resolving the contradiction between ease of manufacture and reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The stop blocks are pre-positioned on the pivot portion before the temples are assembled. This preliminary action ensures that when the temples are unfolded, the stop blocks will automatically engage with the stop grooves to prevent excessive unfolding, thereby maintaining the pivot fixing function while allowing easy assembly through the engaging studs and holes.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If stoppers are disposed at the forefronts of protruding shafts to prevent disengagement, then pivot fixing function is improved, but appearance is compromised and manufacturing complexity increases

Engineering Contradiction:

Improvepivot fixing functionVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The stop blocks are merged with the pivot portion as an integrated structure rather than separate components. This merging eliminates the need for additional stoppers at the forefronts of protruding shafts, reducing manufacturing complexity while maintaining the pivot fixing function through the stop grooves that engage with the stop blocks.

Inventive Principle:

Principle #5Merging (Combining)

3Manufacturing precision

If stop grooves are closed structures to prevent coating solution adsorption, then coating quality is improved, but stoppers cannot be inserted after coating

Engineering Contradiction:

Improvecoating qualityVSAvoidassembly feasibility

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

Instead of making the stop grooves closed structures to prevent coating solution adsorption, the invention inverts the approach by designing open stop grooves. This inversion allows the coating solution to be properly applied while the stop blocks and stop grooves maintain their functional engagement, thus resolving the contradiction between coating quality and assembly feasibility.

Inventive Principle:

Principle #13The other way round (Inversion)

4Reliability

If first stopper and second stopper are used to prevent disengagement, then reliability is improved, but the structure becomes complicated and aesthetic appearance is affected

Engineering Contradiction:

Improveanti-disengagement functionVSAvoidaesthetic appearance

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The stop blocks are nested within the pivot portion structure, with the stop grooves formed as recesses in the pivot portion. This nesting allows the anti-disengagement function to be achieved without external protrusions, maintaining a clean and aesthetically pleasing appearance while ensuring reliable engagement between the stop blocks and stop grooves.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS10539811B2Eyeglasses having hidden pivot structure

Publication Date: 2020.01.21 HUANG YI CHI

AI summary

Eyeglasses having a hidden pivot structure include a frame and two temples. The frame has a first inner surface and a first outer surface. Two sides of the frame have first end surfaces, respectively. The first end surfaces are adjacent to the first inner surface and the first outer surface, respectively. Each first end face is formed with two engaging recesses. The engaging recesses are connected to the first inner surface. The two temples are pivotally connected to the frame. Each temple has a second inner surface and a second outer surface. Each temple has a second end surface. The second end surface is adjacent to the second inner surface and the second outer surface. The second end face is formed with two engaging blocks. When the two temples are unfolded relative to the frame, the engaging blocks are engaged in the engaging recesses, respectively.