Fish Hook with Multiple Convex Facets for Penetration Energy Reduction
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Solution Overview
Problem
Conical fish hooks require significant energy to penetrate a fish's mouth due to their design, while faceted points are weak and prone to bending or breaking during the grinding process, compromising their strength and durability.
Innovation Solution
A fish hook with multiple convex facets is designed, providing a stronger point with more material at the tip and multiple cutting edges, formed by specific dimensions and radii that enhance durability and penetration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conical point is used, then the point can penetrate the fish's mouth, but a significant amount of energy is required
Solution Approach 1:
The conical point is segmented into multiple faceted surfaces (typically 3-6 facets) that create discrete cutting edges. This segmentation allows the point to cut through the fish's mouth membrane in a stepwise manner rather than requiring concentrated force at a single conical surface, significantly reducing the energy required for penetration while maintaining effective penetration capability.
Solution Approach 2:
The facets are formed with specific convex curvatures having radii of 15-60 times the wire diameter. This controlled curvature creates optimal cutting edges that are neither too sharp (which would be weak) nor too blunt (which would require excessive energy). The curved facets allow the point to efficiently cut through tissue while distributing stress along the curved surface.
2Use of energy by moving object
If a faceted point is used, then the energy required for penetration is reduced, but the point becomes weak and prone to bending or breaking
Solution Approach 1:
The critical parameter change is making the facets convex rather than concave. This geometric parameter change fundamentally alters the structural properties: convex facets maintain material throughout the point structure, preventing the formation of weak zones. The convex shape with controlled radii (15-60 times wire diameter) ensures that cutting edges are formed while preserving structural integrity and resistance to bending or breaking.
Solution Approach 2:
Different regions of the point have different geometric qualities optimized for their specific functions. The facet surfaces have convex curvatures optimized for cutting, while the apex and base regions maintain sufficient material thickness for strength. This local differentiation allows the point to be sharp enough for penetration while remaining strong enough to resist breaking during use.
3Ease of manufacture
If the facets are ground during manufacturing, then cutting edges are created, but the faceted surfaces acquire a concave shape that weakens the point
Solution Approach 1:
Instead of grinding facets that naturally form as concave surfaces (the conventional approach), this invention inverts the approach by forming convex facets. This can be achieved through alternative manufacturing methods such as precision machining with convex form tools, diamond turning with convex tools, or specialized grinding techniques that produce convex rather than concave surfaces. This inversion of the conventional faceting approach eliminates the weakness problem while maintaining manufacturing feasibility.
Data Source
AI summary
A fish hook with multiple convex facets is provided. Each facet may have a length that is some multiple of the diameter of the hook body. In addition, each convex facet has a radius of curvature that is some multiple of the diameter of the wire. Each facet may alternatively be formed from first and second convex surfaces, having first and second curvatures.