Flexible Blade Oscillator Geometry for Large Angular Travel
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Solution Overview
Problem
Mechanical clock oscillators with flexible guides face challenges in achieving a large angular travel compatible with conventional escapement mechanisms while maintaining isochronism and insensitivity to external factors, as existing solutions often result in inhibition of anticlastic curvature at large amplitudes.
Innovation Solution
The mechanical oscillator design incorporates more than two flexible blades with specific geometric configurations, including a ratio of blade distance to length (D/L) between 0.15 and 0.85 and an apex angle less than or equal to 60°, allowing for a large angular stroke while ensuring isochronism and insensitivity to positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible blades with large angular travel are used, then compatibility with conventional escapement mechanisms is improved, but isochronism deteriorates due to inhibition of anticlastic curvature
Solution Approach 1:
The patent applies parameter changes by optimizing the geometric parameters of the flexible blades, specifically the ratio D/L between the distance from embedding point to crossing point and the total blade length, and the apex angle at the crossing point. By setting D/L between 0.15 and 0.85 and apex angle ≤ 60°, the blades achieve both large angular travel (≥ 30°) and maintain isochronism, resolving the contradiction between adaptability and reliability
Solution Approach 2:
The patent introduces a third dimension by positioning the crossing point of the blade projections at a specific distance from the rotation axis (between 0.05L and 0.5L). This spatial arrangement in three-dimensional space allows the blades to achieve large angular travel while maintaining proper elastic deformation characteristics, thus preserving isochronism while improving compatibility with escapement mechanisms
2Reliability
If flexible guidance with small angular travel is used, then isochronism is maintained, but compatibility with conventional escapement mechanisms deteriorates
Solution Approach 1:
The patent changes the geometric parameters of the flexible blades, specifically setting the apex angle at the crossing point to be ≤ 60° and the ratio D/L between 0.15 and 0.85. These parameter modifications enable the blades to achieve large angular travel (≥ 30°) while maintaining isochronism, thus improving compatibility with escapement mechanisms without sacrificing reliability
Solution Approach 2:
The patent employs dynamic design by creating a flexible guidance system where the blades can undergo large angular deformations. The blades are designed to flex dynamically during operation, accommodating the large angular travel required by conventional escapement mechanisms while maintaining stable elastic characteristics and isochronism through proper geometric configuration
3Length of moving object
If the apex angle of flexible blades is increased, then angular stroke is improved, but isochronism deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the apex angle of the flexible blades to be ≤ 60° and the ratio D/L to be between 0.15 and 0.85. These specific parameter values enable the system to achieve large angular stroke (≥ 30°) while maintaining isochronism, resolving the contradiction between angular stroke and isochronism
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 configuration enables a mechanical oscillator with a high quality factor, large angular stroke, and improved isochronism, making it compatible with existing escapement mechanisms and reducing sensitivity to external influences.
Implementation Method 1
more than two first flexible blades (31, 32) which support said second inertial element (5) solid and are arranged to return it to a rest position
Data Source
Figure 1~3
Figure 4~9
Figure 6~8
AI summary
Mechanical clockwork oscillator (100), comprising, between a first element (4) and a second inertial element (5), two separate flexible blades (31; 32) returning the inertial element (5) to a rest position in a plane of oscillation, the projections of these blades intersecting, in the rest position, at a point (P), through which passes the pivot axis of the second solid inertial element (5), and the aspect ratio height to thickness is less than 10 for each blade (31; 32), and the total number of flexible blades (31; 32) is strictly greater than two.