Spool Rear Flange Escape Portion for Fishing Reel Backlash Control
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Solution Overview
Problem
Fishing spinning reels experience backlash and forward taper winding issues due to fishing line accumulation on the spool's skirt portion, especially when winding with high or low loads, leading to inefficient line casting.
Innovation Solution
The design incorporates a rear flange with an escape portion that is inclined and extends radially, providing a step-like structure with a bottom and wall portion, ensuring the fishing line is guided correctly, preventing accumulation and reducing backlash by matching the escape portion's dimensions to the line's winding depth and release length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fishing line is wound around the spool with high or low load, then the fishing line accumulates on the skirt portion and undergoes forward taper winding, but this causes backlash during casting
Solution Approach 1:
The invention inverts the conventional spool design by adding a rear flange with an escape portion instead of relying solely on a front flange. This reverse approach allows the fishing line to escape and redistribute properly, preventing forward taper winding and backlash that occur with traditional designs under high or low load conditions.
Solution Approach 2:
The invention applies local quality by creating a specific escape portion on the rear flange with distinct dimensional characteristics (radial length of 10%-30% of the rear flange's radial length, axial length of 1.0-1.5mm). This localized structural modification addresses the line accumulation problem specifically at the rear flange area without affecting other spool components.
2Reliability
If the spool structure is modified to prevent line accumulation, then casting performance improves, but the spool structure becomes more complex
Solution Approach 1:
The invention segments the spool structure by dividing it into distinct functional portions: the fishing line winding drum portion, front flange, rear flange with escape portion, and skirt portion. This segmentation allows each component to perform its specific function independently, with the rear flange's escape portion specifically addressing line redistribution without complicating the overall spool design.
Data Source
AI summary
A fishing spinning reel according to one embodiment of the present invention comprises a reel body; and a spool comprising a fishing line winding drum portion having a cylindrical shape which is provided on the reel body and around which a fishing line is wound, a front flange having a ring shape and rising outward in a radial direction from a front end of the fishing line winding drum portion, a rear flange having a ring shape and rising outward in the radial direction from a rear end of the fishing line winding drum portion, and a skirt portion having a substantially cylindrical shape and extending rearward from the rear flange. The rear flange of the spool is provided with an escape portion for allowing the fishing line to escape.