Composite Lens Block Piece for Torque-Proof Precision Holding
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Solution Overview
Problem
Existing block pieces for eyeglass lenses are inadequate for precise and stable holding during processing and coating, particularly under high forces, and lack efficient handling and cost-effective solutions.
Innovation Solution
A block piece design with a metal bottom part and plastic upper part, connected in a torque-proof manner, allowing for precise orientation and handling of lenses without deformation, featuring interchangeable upper parts for various curvatures and markings for identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single-material block piece is used, then the structure is simple and cost-effective, but it cannot provide both high precision holding and torque-proof connection
Solution Approach 1:
The block piece is constructed from two different materials: a rigid bottom part (metal or hard plastic) that provides torque-proof connection and structural stability, and a softer upper part (elastomeric material) that ensures precise holding of the lens through elastic deformation and conformal contact. This composite structure resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
The block piece is divided into two functional segments: a bottom part for mechanical connection and torque resistance, and an upper part for lens contact and precise positioning. This segmentation allows each part to be optimized for its specific function, achieving both precision and structural integrity.
2Strength
If a rigid block piece structure is used, then torque-proof connection is achieved, but deformation under high forces cannot be adequately absorbed
Solution Approach 1:
The combination of rigid bottom part and elastomeric upper part creates a composite structure where the rigid portion provides torque resistance while the elastomeric portion absorbs deformation through elastic deformation, resolving the contradiction between strength and stability.
Solution Approach 2:
The elastomeric upper part changes its physical parameters (shape, volume) through elastic deformation under load, allowing it to absorb high forces while maintaining the overall structural integrity provided by the rigid bottom part.
3Adaptability or versatility
If multiple upper parts with different curvatures are provided, then adaptability to various lenses is improved, but device complexity and cost increase
Solution Approach 1:
The elastomeric upper part is made deformable, allowing it to adapt dynamically to different lens curvatures through elastic deformation. This eliminates the need for multiple rigid upper parts with different fixed curvatures, reducing kit complexity while maintaining versatility.
Solution Approach 2:
The upper part's physical parameters (shape, curvature) can change in response to different lens geometries, allowing a single upper part to accommodate multiple lens types. This parameter adaptability resolves the contradiction between versatility and device complexity.
Data Source
AI summary
A block piece (1) for blocking a lens (2), in particular an eyeglass lens, by means of a block material (3), wherein the block piece (1) has a bottom part (4) for holding the block piece (1) and an upper part (5) for a fastening of the lens (2) for processing and/or coating of an optically active surface of the lens (2). Additionally, the block piece (1) is used in a method for blocking a lens (2), in particular an eyeglass lens, and the bottom part (4) and multiple upper parts (5) for blocking a lens (2) provided as part of a kit.