Fishing Lure Cavity for Multi-Directional Specular Reflection

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Solution Overview

Problem

Existing fishing lures fail to effectively attract fish due to weak or diffused reflected light, which reduces their fish-attracting effectiveness.

Innovation Solution

The lure incorporates multiple specular reflecting surfaces and reflectors on its outer and inner faces, allowing light to be reflected multiple times to enhance luminance and directionality, mimicking the reflective behavior of bait fish.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a small reflector is sealed with liquid in a body to generate reflected light, then light reflection is achieved, but the reflected light is weak and does not reach fish eaters depending on the angle of light

Engineering Contradiction:
Improvereflected light intensityVSAvoidangular adaptability of reflected light
Core Design Contradiction:
Illumination intensityVSAdaptability or versatility

Solution Approach 1:

The lure body is divided into multiple light-reflecting members with different reflection characteristics (specular reflection members and diffuse reflection members), allowing the system to reflect light in multiple directions simultaneously while maintaining high intensity in specific directions

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different portions of the lure have different reflective properties - some areas have specular reflection surfaces for strong directional reflection, while other areas have diffuse reflection surfaces for broader light distribution, optimizing both intensity and angular coverage

Inventive Principle:
Principle #3Local quality

2Illumination intensity

If an irregular reflection layer with recesses and protrusions is used to create color development, then color variation is achieved, but the reflected light is diffused and fails to form strong reflected light

Engineering Contradiction:
Improvereflected light intensityVSAvoidmanufacturing complexity of reflection layer
Core Design Contradiction:
Illumination intensityVSEase of manufacture

Solution Approach 1:

Instead of creating complex irregular reflection layers with recesses and protrusions, the invention uses simpler specular reflection surfaces (such as mirrored surfaces or smooth reflective coatings) that replicate the light-reflecting function of fish scales more effectively

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The invention changes the reflection parameter from diffuse/irregular reflection to specular reflection, fundamentally altering how light interacts with the lure surface to achieve stronger reflected light while simplifying the manufacturing process

Inventive Principle:
Principle #35Parameter changes

3Illumination intensity

If multiple light-reflecting members are provided inside the lure body to reduce attenuation, then reflected light luminance is enhanced, but the device complexity increases

Engineering Contradiction:
Improvereflected light luminanceVSAvoidnumber of light-reflecting members
Core Design Contradiction:
Illumination intensityVSDevice complexity

Solution Approach 1:

Multiple light-reflecting members with different reflection characteristics are combined within the lure body to achieve both high luminance and broad angular coverage, resolving the contradiction between complexity and performance

Inventive Principle:
Principle #5Merging (Combining)

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 lure significantly increases the intensity and directionality of reflected light, making it more attractive to fish and enhancing its fish-attracting capabilities.

Implementation Method 1

one or more reflecting surfaces or one or more reflectors that specularly reflect light from the outside are provided on each of at least any two of an outer face of the main body portion, an inner face of the main body portion, and an inside of the cavity, and the light from the outside is specularly reflected once or plural times

Methodology Applied
Scientific EffectSpecular reflection: Reflection

Data Source

PatentEP4173481B1Lure for fishing
Publication Date: 2025.08.06 DAIWA SEIKO CORPORATION
  • EP4173481B1 patent drawingFigure 1A
  • EP4173481B1 patent drawingFigure 1B
  • EP4173481B1 patent drawingFigure 2

AI summary

A lure (1) for fishing comprising: a main body portion (2) that includes a cavity (11) inside the main body portion (2), wherein a portion or an entirety of the cavity (11) is visible from outside, and one or more reflecting surfaces (6) or one or more reflectors (7) that specularly reflect light from the outside are provided on each of at least any two of an outer face of the main body portion (2), an inner face of the main body portion (2), and an inside of the cavity (11), and the light from the outside is specularly reflected once or plural times on each of the at least any two of the outer face of the main body portion (2), the inner face of the main body portion (2), and the inside of the cavity (11).