Thread-Fixed Spectacle Glass in Non-Expandable Frames
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Solution Overview
Problem
Conventional methods for fixing spectacle glasses in frames are inadequate for non-expandable materials like wood and aluminum, and existing solutions are not cost-efficient or aesthetically pleasing.
Innovation Solution
A spectacle frame design featuring a completely closed circumferential shape with a thread inserted between the frame and the edge of the glass, providing reliable fixation without the need for heating or separating the frame, using a single thread for multiple glasses or separate threads for each, and incorporating grooves and bores for thread guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional fixing methods (screws, heat expansion) are used, then spectacle glasses can be fixed in expandable materials, but non-expandable materials like wood and aluminum cannot be used for one-part frames
Solution Approach 1:
The frame is divided into two functional parts: a complete circumferential frame structure and a separate thread element. The thread acts as an independent fixing component that can be inserted after frame production, enabling the frame to be manufactured from any material without requiring post-production thermal processing or disassembly.
Solution Approach 2:
The thread serves as an intermediary element between the frame and the spectacle glass. It provides the fixing function without requiring the frame material itself to be expandable or modifiable, thus enabling use of non-expandable materials like wood and aluminum while maintaining ease of manufacture.
2Shape
If the frame is made as one piece for aesthetic reasons, then aesthetic appearance is improved, but fixing spectacle glasses becomes difficult or impossible with conventional methods
Solution Approach 1:
The fixing function is segmented from the frame structure itself and implemented through a separate thread element. This allows the frame to maintain its complete circumferential one-piece aesthetic appearance while the thread provides the necessary fixing capability through a separate insertion process.
Solution Approach 2:
The frame is manufactured complete with circumferential continuity before the glass insertion process. The thread is then inserted through pre-provided openings and guided through grooves in the frame, achieving both aesthetic appearance and functional requirement without requiring frame modification after production.
3Reliability
If a thread is inserted to fix the spectacle glass, then reliable fixation is achieved, but the frame structure becomes more complex
Solution Approach 1:
The frame maintains its simple complete circumferential structure for the majority of its length, with thread guidance grooves and openings provided only at specific local positions. This localized addition of fixing features achieves reliable glass fixation while minimizing the increase in overall frame structure complexity.
4Reliability
If separate threads are used for each spectacle glass, then fixation reliability is improved, but manufacturing time and cost increase
Solution Approach 1:
The fixing function for both spectacle glasses is merged into a single thread element that passes through both sides of the frame. This single thread provides reliable fixation for each glass independently while reducing assembly operations compared to using separate threads, thus improving productivity without sacrificing fixation reliability.
Data Source
AI summary
The present invention relates to spectacles comprising a spectacle frame and a spectacle glass. The spectacle frame, in turn, comprises a frame which defines a receiving opening for the spectacle glass and essentially completely borders the spectacle glass. The spectacle glass is fixed in the receiving opening by means of a thread inserted between the frame defining the receiving opening and the edge of the spectacle glass.