Spinning Reel Bail Support Smooth Pivoting

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

The striking member in existing bail support mechanisms for spinning reels can get caught on protrusions, leading to non-smooth sliding and pivoting of the bail support member, which affects the functionality of the reel.

Innovation Solution

The bail support mechanism features a bail support member with an abutting surface comprising a first portion, a second portion, a stepped portion, and a sliding portion that extends continuously between them, preventing catching and allowing smooth pivoting by inclining the sliding portion to approach the rotor or bail support member, and incorporating a toggle mechanism for biasing the bail support member between line guiding and releasing positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If the abutting surface includes a protrusion midway in the sliding path, then the user can recognize the position switching through clicking sound, but the striking member may get caught on the protrusion causing non-smooth sliding

Engineering Contradiction:
Improveposition recognitionVSAvoidsmooth sliding
Core Design Contradiction:
Loss of informationVSEase of operation

Solution Approach 1:

The abutting surface is segmented into multiple portions (first abutting surface, second abutting surface, and inclined surface) with distinct functions. The inclined surface acts as a transition zone that guides the striking member smoothly from one abutting surface to another, preventing catching while maintaining position recognition through the segmented structure.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The inclined surface serves as an intermediary element between the first and second abutting surfaces. It mediates the transition of the striking member by providing a gradual slope that prevents direct impact and catching on the protrusion, while still allowing the position switching to be detected.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If the striking member is biased toward the abutting surface by the biasing member, then the striking member can abut the abutting surface to generate clicking sound, but the striking member may get caught on the protrusion

Engineering Contradiction:
Improveposition detectionVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

Different portions of the abutting surface have different local qualities: the first and second abutting surfaces provide firm contact for reliable position detection, while the inclined surface provides a smooth transition zone. This local differentiation allows the structure to achieve both reliable detection and smooth operation without requiring complex additional components.

Inventive Principle:
Principle #3Local quality

3Ease of operation

If the sliding portion is inclined to approach the rotor or bail support member, then the biasing member can be gradually contracted enabling smooth pivoting, but the geometry becomes more complex

Engineering Contradiction:
Improvesmooth pivotingVSAvoidgeometry complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The inclined sliding portion introduces dynamic characteristics to the otherwise static abutting surface. As the bail support member pivots, the striking member dynamically transitions along the inclined surface, gradually contracting the biasing member. This dynamic interaction enables smooth pivoting while maintaining a relatively simple geometric structure compared to adding complex mechanisms.

Inventive Principle:
Principle #15Dynamics

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 smooth pivoting of the bail support member, preventing catching and ensuring smooth operation by allowing the striking member to slide smoothly between positions, thus enhancing the functionality of the spinning reel.

Implementation Method 1

a biasing member (5) that biases the striking member (4) toward the other of the rotor (120) or the bail support member (2)

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

The sliding portion (27) is inclined so as to approach the other of the rotor (120) or the bail support member (2) while approaching the stepped portion (26)

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentEP2918168B1Bail support mechanism for a spinning reel
Publication Date: 2018.10.17 SHIMANO COMPONENTS MALAYSIA SDN BHD JOHOR
  • EP2918168B1 patent drawingFigure 1
  • EP2918168B1 patent drawingFigure 2
  • EP2918168B1 patent drawingFigure 3~4

AI summary

A bail support mechanism includes a bail support member (2), a striking member (4), a biasing member (5), and an abutting surface. The abutting surface includes a first portion (24), a second portion, a stepped portion (26), and a sliding portion (27). The first portion (24) is a portion that the striking member (4) abuts when in the line guiding position. The second portion is a portion that the striking member (4) abuts when in the line releasing position. The stepped portion (26) is disposed between the first portion (24) and the second portion and has an apex (261). The sliding portion (27) extends continuously from the first portion (24) to the apex (261).