Pivoting Spectacle Assembly for Tool-Free Lens-Frame Joining
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Solution Overview
Problem
Existing eyeglasses, particularly safety eyeglasses, are difficult to assemble due to complex geometries and require special tools or aids, making the process cumbersome and inefficient.
Innovation Solution
The eyeglasses are designed with a pivot mechanism allowing the lens assembly and frame to be assembled relative to each other about a pivot point, utilizing pre-centering pivoting means and counter-measures for intuitive assembly without tools, ensuring a stable and durable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional assembly methods are used for eyeglasses, then the components can be securely assembled, but the assembly process requires special tools and complex procedures
Solution Approach 1:
The assembly system is segmented into distinct functional elements: pivot points integrated into the frame, pre-centering means on the lens assembly, and counter-means on the frame. This segmentation allows each component to perform its specific function independently, enabling simple manual assembly while maintaining secure connection.
Solution Approach 2:
The pre-centering means and counter-means are designed to automatically guide the lens assembly into the correct position during assembly. The pivot points and pre-centering features work together to self-align the components without requiring external tools or complex procedures, making the assembly process intuitive and tool-free.
2Reliability
If complex geometries are used for individual components, then the glasses can be securely assembled, but the manufacturing process becomes difficult
Solution Approach 1:
The secure assembly is achieved through segmented functional features rather than complex overall geometries. The pivot points, pre-centering means, and counter-means are simple geometric elements that can be easily manufactured, yet when combined, they provide reliable and secure assembly of the lens assembly to the frame.
Solution Approach 2:
The invention changes the geometric parameters of the components to simple, manufacturable forms. Instead of complex curved surfaces and irregular shapes, the components use straightforward geometric features like cylindrical pivot points, planar pre-centering surfaces, and complementary counter-surfaces that are easy to manufacture while maintaining assembly security.
3Ease of operation
If manual assembly without tools is implemented, then the assembly process is simplified, but precise alignment of components becomes challenging
Solution Approach 1:
The pre-centering means and counter-means are designed to perform preliminary alignment action automatically during the assembly process. As the lens assembly approaches the frame, these features engage first to establish precise alignment, guiding the components into their correct relative positions before final securing occurs, all without requiring tools.
Solution Approach 2:
The pre-centering means and counter-means act as intermediary elements between the lens assembly and frame. These intermediary features facilitate precise alignment by providing contact surfaces that guide the components into correct positioning, enabling accurate alignment through simple manual insertion without tools.
Data Source
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AI summary
A pair of spectacles comprises a lens assembly (2), a frame (1) and at least one pivot point for assembling the lens assembly (2) and the frame (1) by pivoting them relative to each other, wherein the frame (1) has a nose support device (17) for support against the nose of a wearer of the spectacles and the lens assembly (2) has a nose support device receptacle which, in the assembled state of the lens assembly (2) and the frame (1), receives the nose support device (17).