Pivotable Fin Mechanism for Spinning Reel Line Guide
Solution Overview
Problem
Conventional spinning reels with line slack prevention fins suffer damage and user discomfort due to knots passing through the fins, as existing designs do not effectively mitigate the impact of knots on the fin structure.
Innovation Solution
A line guide mechanism for spinning reels featuring a pivotable fin with a detachable pivot shaft and biasing elements that allows the fin to pivot and return to its original position, minimizing contact impact and maintaining line guidance between the line roller and fin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed fin is used to guide the fishing line, then the line guidance function is maintained, but the fin suffers damage when knots pass through and user discomfort occurs due to impact
Solution Approach 1:
The fin is designed to pivot about a pivot shaft, transforming from a fixed structure to a dynamic one. When a knot contacts the fin, it causes the fin to pivot rather than transmit impact force to a fixed structure, preventing damage while maintaining line guidance function.
Solution Approach 2:
The pivot shaft is positioned at the proximal end of the fin, creating a lever arm that cushions the impact of knots before they can cause damage. This pre-positioned pivot point absorbs and distributes the impact force, protecting the fin structure from knot-induced damage.
2Device complexity
If a fixed fin is used, then structural simplicity is maintained, but impact from knots causes damage and discomfort
Solution Approach 1:
The fin structure incorporates a pivot shaft that allows rotational movement. This dynamic element adds minimal complexity while significantly improving durability by enabling the fin to absorb knot impacts through pivoting motion rather than rigid contact.
3Reliability
If the fin is made pivotable, then damage from knots is prevented, but the device complexity increases
Solution Approach 1:
The fin is designed to pivot about a pivot shaft, transforming from a fixed structure to a dynamic one. When a knot contacts the fin, it causes the fin to pivot rather than transmit impact force to a fixed structure, preventing damage while maintaining line guidance function.
Solution Approach 2:
The pivot shaft is positioned at the proximal end of the fin, creating a lever arm that cushions the impact of knots before they can cause damage. This pre-positioned pivot point absorbs and distributes the impact force, protecting the fin structure from knot-induced damage.
4Ease of operation
If a pivot shaft is provided at the proximal end part of the fin, then the fin can pivot easily with small contact force, but the pivot radius increases
Solution Approach 1:
The fin is designed to pivot about a pivot shaft, transforming from a fixed structure to a dynamic one. When a knot contacts the fin, it causes the fin to pivot rather than transmit impact force to a fixed structure, preventing damage while maintaining line guidance function.
Solution Approach 2:
The pivot shaft is positioned at the proximal end of the fin, creating a lever arm that cushions the impact of knots before they can cause damage. This pre-positioned pivot point absorbs and distributes the impact force, protecting the fin structure from knot-induced damage.
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
Prevents damage to the fin and reduces user discomfort by allowing the fin to pivot and return, ensuring continuous line guidance and minimizing knot-induced stress on the fin.
Implementation Method 1
the holding part includes a biasing element that biases the fin to pivotably move about the pivot shaft in a second direction opposite to a first direction
Data Source
AI summary
A line guiding mechanism for a spinning reel includes a spool, rotor arms for winding a fishing line around the spool, a first support part supported by a rotor arm, a line roller disposed on the first support part and that guides fishing line onto the spool, and a fin. A proximal end part of the fin is disposed on a first support part and a distal end part of the fin has a line guide part facing the line roller and configured to pivotably move.