Spool Oscillation Block with Composite Groove Geometry
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Solution Overview
Problem
Conventional spinning reel oscillation systems produce uneven line winding due to their sinusoidal speed curves, leading to suboptimal flatness of line lay on the spool, and are prone to jamming at certain positions.
Innovation Solution
Designing an oscillation system with a sinusoidal correction function applied in synchronized opposition to the standard sinusoidal speed curve, incorporating a sinusoidal oscillation block with a straight-line center section and sinusoidal end sections to achieve a more flat and efficient line winding, while addressing the jamming issue by modifying the oscillation block geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional sinusoidal oscillation system is used, then the spool oscillates back and forth to wind line, but the sinusoidal speed curve produces uneven line winding and suboptimal flatness
Solution Approach 1:
The oscillation block groove is designed with variable curvature - a straight center section for uniform speed during the middle oscillation phase, and curved end sections for controlled acceleration and deceleration. This dynamic geometric variation allows the system to maintain optimal line winding flatness while preventing jamming at oscillation extremes.
Solution Approach 2:
The groove geometry parameters are specifically optimized: the straight center section provides constant velocity motion for the majority of the oscillation stroke, while the curved end sections with specific radii control the speed transitions. This parameter optimization resolves the contradiction between uniform winding quality and operational smoothness.
2Reliability
If the oscillation pin rotates along a circular path in a straight groove, then the spool oscillates, but the sinusoidal speed curve causes jamming at certain positions
Solution Approach 1:
The groove transitions from a simple straight path to a composite path with a straight center section and curved end sections. This dynamic geometric design allows the oscillation block to move at constant velocity through the middle portion of the stroke, eliminating the speed variations that cause jamming, while the curved ends provide smooth acceleration and deceleration.
3Manufacturing precision
If a straight groove is used in the oscillation block, then the oscillation mechanism is simple, but the sinusoidal speed curve cannot achieve optimal line winding flatness
Solution Approach 1:
The groove is segmented into distinct functional zones: a straight center section for uniform velocity motion that produces optimal line winding flatness, and curved end sections for controlled speed transitions. This segmentation allows each portion to perform its specific function optimally without overly complicating the overall design.
Solution Approach 2:
Different portions of the groove have different geometric properties tailored to their specific functions. The center section is straight to provide uniform speed for quality winding, while the end sections are curved to manage acceleration and deceleration. This local differentiation of groove quality resolves the contradiction between winding precision and mechanical simplicity.
Data Source
AI summary
In a reel with an oscillation system, a sinusoidal correction force applied to the normal oscillation function to produce an improved line lay on the reel spool.