Screwless Eyeglass Hinge Assembly for Stable Temple Folding
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Solution Overview
Problem
Conventional glasses require screw fastening for assembly, which is complicated, costly, and results in unstable temple folding and unfolding due to screw loosening over time.
Innovation Solution
Glasses with screwless hinges featuring a first and second connection part intersecting at an eyeglass hinge, and a support pillar with a polygonal cross section to ensure stable folding and unfolding without screws, using a polygonal support pillar to prevent shaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw fastening is used to assemble glasses components, then the connection between rims and temples is secure, but the assembly process becomes complicated and time-consuming
Solution Approach 1:
The patent removes screws and screw fastening mechanisms from the hinge assembly, extracting the fastening function and replacing it with a press-fit connection system where the temple arm is directly inserted into the hinge housing, eliminating the need for separate fastening components
Solution Approach 2:
The patent combines the hinge housing and temple arm connection into an integrated press-fit structure, merging the functions of connection and support into a single unified component that eliminates the need for separate screws and fastening operations
2Ease of manufacture
If screw fastening is used to assemble glasses components, then the components can be joined together, but labor costs increase and productivity decreases
Solution Approach 1:
The press-fit hinge connection is designed to be self-assembling without requiring skilled technicians or special tools, allowing standard assembly workers to quickly join components through simple insertion and pressing operations, thereby increasing productivity and reducing labor costs
3Reliability
If screws are used to fasten temples to hinges, then the temples can be securely attached, but the screws loosen over time due to repeated folding and unfolding
Solution Approach 1:
The patent removes screws from the hinge assembly and replaces them with a press-fit connection where the temple arm is directly inserted into the hinge housing, eliminating the problem of screw loosening through repeated use
Solution Approach 2:
The patent incorporates a curved elastic portion in the temple arm that provides continuous contact pressure against the hinge housing, creating a self-tightening effect that maintains secure attachment over time without loosening
4Device complexity
If a support pillar with circular cross section is used, then the structure is simple, but the temple shaking occurs during repeated folding and unfolding
Solution Approach 1:
The patent changes the support pillar from a circular cross-section to a polygonal cross-section (such as square or rectangular), creating asymmetric contact points that prevent rotational movement and temple shaking while maintaining structural simplicity
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 easy assembly, reduces costs, and maintains stable temple folding and unfolding despite repeated use, improving productivity and user experience.
Implementation Method 1
the second connection part may be coupled to the outer peripheral surface of the support pillar by an elastic force
Data Source
AI summary
Proposed are glasses with screwless hinges. The glasses include an upper frame supporting upper edges of lenses, lower frames supporting lower edges of the lenses and coupled to the upper frame, temples which are folded and unfolded with respect to the upper frame, and eyeglass hinges which are arranged between the upper frame and the temples and support end parts of the upper frame and end parts of the temples such that the temples are folded and unfolded with respect to the upper frame, wherein a first connection part formed on each of the end parts of the upper frame and a second connection part formed on each of the end parts of the temples are fitted and coupled to each of the eyeglass hinges.