Ophthalmic Lens Positioning Tool with Centering Recess
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Solution Overview
Problem
The manual positioning of attachment members on positioning and centering pins for ophthalmic lenses is often incorrect, leading to misalignment and concealment of critical marks necessary for precise lens positioning during manufacturing, especially due to the variety of spectacle frame shapes requiring multiple sizes of pins and members.
Innovation Solution
A system comprising a positioning and centering pin, an attachment member, and a tool with a body featuring a receiving recess, centering member, and guiding member to ensure accurate positioning of the attachment member on the pin, allowing for correct and repeatable attachment regardless of pin and member size or shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual positioning of attachment member on positioning and centering pin is used, then operation simplicity is maintained, but positioning precision deteriorates causing misalignment and concealment of critical marks
Solution Approach 1:
A positioning tool acts as an intermediary device between the operator and the attachment member-pin system. The tool includes a receiving cavity that holds the pin and attachment member, with positioning features that guide correct placement. This intermediary structure enables simple operation while ensuring precise positioning, resolving the contradiction between ease of operation and positioning precision.
2Adaptability or versatility
If multiple sizes of positioning and centering pins and attachment members are used to accommodate various spectacle frame shapes, then adaptability is improved, but device complexity increases
Solution Approach 1:
The positioning tool is designed with universal adaptability to work with multiple sizes of pins and attachment members. The receiving cavity and positioning features are configured to accommodate different dimensions while maintaining consistent positioning functionality. This allows a single tool design to serve multiple purposes across various frame shapes, improving adaptability without proportionally increasing device complexity.
3Productivity
If incorrect positioning of attachment member occurs, then manufacturing speed is maintained, but product quality deteriorates due to lens misalignment and marking concealment
Solution Approach 1:
The positioning tool performs preliminary positioning actions before the actual attachment process. The receiving cavity and positioning features pre-establish the correct spatial relationship between the attachment member and pin, ensuring accurate alignment before bonding occurs. This preliminary positioning action prevents misalignment and marking concealment while maintaining manufacturing speed, resolving the contradiction between productivity and reliability.
Data Source
AI summary
A system includes a positioning and centering pin (4) configured to be attached to an ophthalmic lens, an attachment member (5) configured to be positioned on and attached to the pin and to be attached to the lens, a tool (20) for positioning the attachment member on the pin, and which includes a body (42) provided with at least one receiving recess configured to at least partially receive at least one of the attachment members and the pin, at least one centering member (48, 56) and at least one guide member (48, 57), which are configured such that, when the attachment member and the pin are mounted on the tool, the attachment member is centered relative to the body and the pin is guided relative to the body, whereby the attachment member is positioned in a predetermined position on the pin.