Rim Frame Deflection for Tool-Free Lens Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for manufacturing and exchanging spectacles require costly and time-consuming lens processing and tool-assisted attachment/detachment, which complicates the production and adjustment of spectacles to fit individual pupillary distances.
Innovation Solution
A rim frame and lens structure where the rim frame is designed to be narrower in the up-down direction and wider in the left-right direction, allowing for lens attachment and detachment by deflection without tools, and featuring limited gaps for stabilization, enabling easy handling and adjustment of bridge length to fit different pupillary distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rim frame and lens are made of hard material with shallow groove depth, then the structural strength is improved, but the ease of attachment and detachment deteriorates
Solution Approach 1:
The rim frame is designed with flexible portions that allow dynamic deflection during lens attachment and detachment. The frame can elastically deform to accommodate lens insertion and then return to its original shape to secure the lens, combining strength with ease of operation without requiring tools or complex mechanisms.
2Manufacturing precision
If the groove and lens edge are processed separately with three-dimensional curves, then the manufacturing precision is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The attachment structure is segmented into distinct functional zones: flexible portions of the rim frame for insertion assistance, continuous restraint portions for stable holding, and limited gap portions for controlled release. This segmentation allows each part to be optimized independently while simplifying the overall manufacturing process.
Solution Approach 2:
Different portions of the rim frame have different properties: some areas are made flexible for insertion, while other areas maintain rigidity for stable holding. The rim frame includes both flexible portions and continuous restraint portions with distinct functions, allowing local optimization of manufacturing and performance characteristics.
3Ease of manufacture
If a slight deviation is allowed in groove and lens edge matching, then the ease of manufacture is improved, but the reliability deteriorates
Solution Approach 1:
The rim frame's flexibility parameter is optimized to compensate for manufacturing deviations. The elastic deflection capability allows the frame to adapt to slight variations in lens dimensions and groove positioning, maintaining reliable lens holding without requiring extremely precise manufacturing tolerances.
4Reliability
If the rim frame is deflected to prevent lens falling off and rotation, then the reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The rim frame utilizes elastic deflection dynamically: during attachment, the frame is temporarily deflected to allow lens insertion, then automatically returns to its original shape to secure the lens. This dynamic behavior provides both ease of operation and reliable holding without requiring external tools or complex mechanisms.
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
This solution simplifies the manufacturing and adjustment of spectacles, reducing the need for lens processing and tool-assisted procedures, facilitating mass production and easy handling of spectacles with adjustable bridge lengths to fit various pupillary distances, while ensuring holding stability and ease of use.
Implementation Method 1
a lens is attached and detached by deflection of a rim frame
Implementation Method 2
the lens is fixed by a force of the rim frame for returning to an original position by deflection of the rim frame
Data Source
AI summary
The rim frame and the lens are continuously restrained to each other over a range other than the gap to stabilize holding of the lens while attachment and detachment of the lens can be facilitated by expanding a gap as consolidating the gaps in the two places into one place due to the deflection of the rim frame and movement of the lens in the left-right direction, whereby the lens can be easily attached and detached without using a tool such as a screwdriver, while can achieve holding stability when fixing the lens and ease of attachment and detachment.