Spectacle Frame Lens Assembly Using Gibbous Wedge
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Solution Overview
Problem
Conventional spectacle frames lack a proper structure for adjusting the tightness and easy removal/installation of lenses, leading to potential deformation or loosening over time.
Innovation Solution
A framework with a wedge hole system in the spectacle frames, featuring a gibbous wedge and support slot, allows for adjustable distance and tight fitting of lenses, ensuring easy assembly and adjustment of lens position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lenses are made easily removable for replacement, then ease of operation is improved, but reliability deteriorates due to potential deformation or loosening
Solution Approach 1:
The lens assembly is divided into multiple segments: the lens body, the neck portion, and the wedge-shaped locating structure. This segmentation allows the lens to be easily inserted and removed while the wedge-shaped portion provides reliable positioning and tightness control through its geometric shape that prevents loosening during wear.
Solution Approach 2:
The lens is nested within the spectacle frame through a hierarchical structure where the lens body fits into the lens cavity, the neck portion engages with the support slot, and the wedge-shaped locating structure fits into the wedge hole. This nested arrangement ensures both easy assembly and secure fixation.
2Ease of operation
If a proper structure is provided for lens removal and replacement, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The wedge-shaped locating structure is positioned at a specific location (the neck portion of the lens) rather than distributing complexity throughout the entire lens or frame. This localized approach provides the necessary functionality for easy removal and replacement while minimizing overall structural complexity.
Solution Approach 2:
Instead of using complex locking mechanisms that require multiple components and assembly steps, the invention uses a simple wedge-shaped geometric form that naturally provides both locating and tightening functions through its shape alone, inverting the conventional approach to lens fixation.
3Productivity
If lenses are easily assembled into frames, then productivity is improved, but manufacturing precision deteriorates due to fitness adjustment issues
Solution Approach 1:
The wedge-shaped locating structure and support slot are designed to automatically position and secure the lens during assembly without requiring additional adjustment steps. As the lens is inserted, the wedge shape naturally guides it into the correct position and provides self-tightening, eliminating the need for separate positioning operations and maintaining high precision.
Solution Approach 2:
The geometric parameters of the wedge-shaped locating structure and support slot are precisely controlled during manufacturing to ensure proper fit and positioning. By optimizing the wedge angle and dimensions, the design achieves both easy assembly and high positioning accuracy without compromising manufacturing precision.
Data Source
AI summary
A framework of combination of spectacle frames with lenses comprises a spectacle frame provided with an upper arm and assembled with a nosepiece, in which a hole seat is formed between the upper arm and the nosepiece and a wedge hole is formed inside the hole seat; a lens provided with a neck, in which adjustment of multiple segments may be made for clamping by using a gibbous wedge of the nosepiece that is arranged in the wedge hole, and a distance between the gibbous wedge and the upper arm may be adjusted for the tight fitness of lens. The lens may be easily assembled into the spectacle frame, and the issue on adjustment of fitness without any segment due to easy assembly.