Fishhook Shank Design for Bait Coverage and Line Security
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Solution Overview
Problem
Conventional fishhooks with wider spade-ends require complex manufacturing processes and higher production costs, and expose the fishing line, making them prone to being gnawed by fish, while also preventing bait from fully covering the hook.
Innovation Solution
A fishhook design featuring a flat surface on the shank with two perpendicular holes and upward projections allows bait to cover the hook entirely, preventing line exposure and using simple tools for production, and burr removal in a chemical solution to prevent line cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wider spade-end is provided at the end of the shank to prevent the fishing line from falling off, then the fishing line is secured, but the bait cannot fully cover the hook and the fishing line becomes exposed and prone to being gnawed by fish
Solution Approach 1:
The invention transitions from a conventional lateral spade-end design to a vertical hole-based system. Instead of expanding the shank width laterally, the fishing line is secured by passing it through a hole perpendicular to the shank surface, utilizing the third dimension (depth/thickness) rather than increasing surface area. This allows the bait to cover the hook completely while the line remains secured internally.
2Object-affected harmful factors
If a through-hole and projections are molded using a press die to enable bait coverage and line security, then bait can fully cover the hook and line exposure is prevented, but manufacturing time increases and production costs rise
Solution Approach 1:
The invention divides the shank into distinct functional segments: a flat surface area for bait coverage, a vertical hole for line passage, and upward projections for line anchoring. These segmented features can be created through simple sequential operations (forming flat surface, drilling hole, creating projections) rather than requiring a complex integrated press die mold, thereby reducing manufacturing complexity and cost.
3Ease of operation
If the fishing line is tied using snell knots to secure it to the shank, then the line is attached, but the process is time-consuming for unaccustomed users and the line may still be gnawed and cut
Solution Approach 1:
The hole and projections structure performs the line-securing function automatically through its geometry. The fishing line passes through the hole and is anchored by the upward projections that prevent displacement, eliminating the need for complex knot-tying techniques. The structure itself provides the securing mechanism, making the process intuitive and rapid for users of any skill level.
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 design enables bait to securely cover the hook, prevents line exposure and gnawing, reduces manufacturing time and costs, and ensures efficient production with fewer defects.
Implementation Method 1
burr removal in a chemical solution to prevent line cutting
Data Source
AI summary
An inexpensive fishhook and a method for manufacturing the same whereby a piece of bait can be put as far as an end part of the chimoto side. An upper part of a shank (2) of a fishhook (1) is hit to form a flat surface (3) thereon, and a hole (4) penetrating through the flat surface (3) is formed at two points with a vertical interval therebetween. A part of the shank (2) is cut transversely across an upper hole (4a) of the holes to thereby form, at the upper part of the shank (2), a hole (4b) through which a fishing line (5) is passed and tied, and two upward protrusions (7) enabling a piece of bait to be engaged therewith and being capable of preventing the fastened fish line from being displaced from the upper part of the shank.