Composite Fishing Line Guide for Low Weight and Impact Protection

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Solution Overview

Problem

Existing fishing line guides are limited in their ability to reduce weight while maintaining strength and durability.

Innovation Solution

A fishing line guide composed of a combination of a foam portion and a reinforced resin portion, with the reinforced resin portion covering and protecting the foam portion, allowing for weight reduction and impact absorption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If a fishing line guide is formed from prepreg to reduce weight, then weight is reduced, but strength and durability are insufficient

Engineering Contradiction:

Improveweight of fishing line guideVSAvoidstrength and durability

Core Design Contradiction:

Weight of moving objectVSStrength

Solution Approach 1:

The fishing line guide is constructed as a composite structure combining foam material and resin material. The foam portion provides lightweight properties while the resin portion provides strength and durability. This composite approach resolves the contradiction by integrating materials with complementary properties to achieve both weight reduction and sufficient mechanical performance.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

Different portions of the fishing line guide have different material compositions tailored to their specific functional requirements. The foam portion is used where weight reduction is prioritized, while the resin portion is used where strength and durability are critical. This local differentiation allows the structure to optimize both weight and strength in different regions simultaneously.

Inventive Principle:

Principle #3Local quality

2Weight of moving object

If the reinforced resin portion is made thin to achieve weight reduction, then weight is reduced, but protection capability is compromised

Engineering Contradiction:

Improveweight of guide frameVSAvoidprotection against damage

Core Design Contradiction:

Weight of moving objectVSReliability

Solution Approach 1:

The guide frame combines foam material and resin material in a composite structure. The foam portion provides impact absorption capabilities while the thin resin portion provides protective coverage. This composite approach allows the resin portion to be made thinner for weight reduction while the foam material compensates for the reduced protection capability of the resin layer.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The foam material acts as an intermediary between external impacts and the resin portion. When impact occurs, the foam absorbs and dissipates the energy before it reaches the resin portion, allowing the resin layer to be thinner while maintaining adequate protection. This intermediary function resolves the contradiction between thin protective layer and sufficient protection capability.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

The combination achieves significant weight reduction while ensuring strength and protection against damage, with the foam portion absorbing impact and the reinforced resin portion providing structural support.

Implementation Method 1

since the foam portion can absorb impact

Methodology Applied

Scientific EffectImpact absorption: Damping

Data Source

PatentUS20250366452A1Fishing line guide

Publication Date: 2025.12.04 SHIMANO INC

AI summary

A fishing line guide mountable to a fishing rod body to guide a fishing line, the fishing line guide includes a foam portion made of foamed resin, and a reinforced resin portion made of fiber-reinforced resin and covering a part of the foam portion.