Spectacle Frame Measuring Assembly with Open Bow Holding
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Solution Overview
Problem
Existing measuring assemblies for spectacle frames struggle with accurately and efficiently measuring the internal, curved surfaces of lens frames, as they are inaccessible radially and require manual rotation, which limits precision and automation.
Innovation Solution
A redesigned holding device with open spaces for spectacle frame bows allows for translational and rotational movement of the lens frame, using a gear rack and sprocket system for precise alignment and drive, along with clamping elements for perpendicular movement, enabling non-contact, automated measurement of internal lens frame surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the spectacle frame is held in a conventional measuring table setup, then the structure is simple and stable, but the internal curved surfaces of the lens frame remain inaccessible and cannot be measured
Solution Approach 1:
The patent inverts the conventional measuring table setup by positioning the light source and sensor inside the lens frame rather than outside. The holding device is redesigned with open spaces to accommodate this inversion, allowing the measurement system to access internal surfaces from the interior side of the lens frame, thereby resolving the accessibility problem.
Solution Approach 2:
The patent transitions from a two-dimensional external measurement approach to a three-dimensional internal measurement approach. By introducing open spaces in the holding device and positioning measurement components inside the lens frame, the system accesses the internal curved surfaces through a new spatial dimension, enabling measurement of previously inaccessible areas.
2Productivity
If manual rotation is used to position the spectacle frame, then the device structure is simple, but the measurement process is slow and less accurate
Solution Approach 1:
The patent transforms the static, manually rotated holding device into a dynamic system with automated rotational and translational movements. The holding device is equipped with drive mechanisms that enable precise, programmable positioning of the spectacle frame, allowing automated measurement sequences that are both faster and more accurate than manual operations.
Solution Approach 2:
The holding device is designed to automatically position and reposition the spectacle frame during the measurement process without requiring manual intervention. The integrated drive mechanisms enable the system to self-adjust the frame orientation and location, facilitating continuous automated measurement across multiple surfaces and angles.
3Measurement precision
If additional translational axes are added to enable frame rotation and alignment, then measurement accuracy improves, but the device becomes more complex and requires more space
Solution Approach 1:
The patent merges multiple movement functions into a single integrated holding device structure. The device combines rotational and translational capabilities within one compact unit, eliminating the need for separate additional axes. The open space design allows the spectacle frame to be positioned and oriented using the existing movement components without requiring extra translational axes.
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 allows for quicker, more accurate, and automated measurement of spectacle frames by enabling the lens frame to be rotated and aligned without additional translational axes, ensuring precise detection of internal surfaces and accommodating various frame sizes and shapes.
Implementation Method 1
at least one light source for generating a line-shaped light beam to be projected on a region of the lens frame to be evaluated, and at least one sensor that can be coupled with an evaluation unit for detecting the reflected light beam
Data Source
AI summary
A measuring assembly for measuring an inside of a lens frame of a spectacle frame, said lens frame at least partially delimiting an inscribed surface area F that corresponds to a lens shape, comprising a holding device for mounting the spectacle frame, at least one light source for generating a light beam to be projected on a region of the lens frame to be evaluated, and at least one sensor that can be coupled to an evaluation unit for detecting the reflected light beam, wherein the holding device can be rotated about a rotational axis r and moved in the direction of a movement axis x, and the movement axis x comprises at least one movement component in a direction perpendicular to the rotational axis r. The holding device is used to fix the spectacle frame by spectacle frame bows, wherein at least one free space is provided in the region of the holding device, said free space being used to receive the spectacle frame bows of a spectacle frame to be held which are not folded in or cannot be folded in.