Removable Hook Jig Head for Tungsten Sinker Waste Reduction
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Solution Overview
Problem
Conventional jig heads require the disposal of the entire unit when the hook becomes worn, leading to environmental concerns and economic inefficiency, especially with high-cost materials like tungsten, and existing solutions for replacing hooks are complex and cumbersome.
Innovation Solution
A jig head design featuring a removable hook attachment mechanism using a tapered surface and crimping mechanism, allowing for easy replacement of hooks without altering the sinker head, utilizing materials like lead, zinc alloys, or tungsten for the sinker head and a steel hook with a ring for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hook is integrally fixed on the sinker head, then the hook remains securely fixed during fishing, but the entire jig head must be disposed of when the hook is worn
Solution Approach 1:
The jig head is divided into separable components: the sinker head and the hook. The hook can be detached from the sinker head through the through-hole, allowing the hook to be replaced independently while retaining the sinker head. This segmentation resolves the contradiction by enabling reliable hook fixation during use while preventing waste of the sinker head material.
Solution Approach 2:
The design enables recovery and reuse of the sinker head by allowing the hook to be removed and replaced. Instead of discarding the entire jig head when the hook wears out, only the hook is discarded and the sinker head is recovered for continued use, reducing material waste.
2Loss of substance
If the hook is made replaceable, then material waste is reduced, but the fixation mechanism becomes complex
Solution Approach 1:
The through-hole provides a simple segmentation interface between the hook and sinker head. This straightforward structural division allows the hook to be inserted and removed through the hole without requiring complex attachment mechanisms, thereby reducing device complexity while enabling replaceability.
Solution Approach 2:
The hook is extracted from the traditional welded or integrated configuration and made removable through the through-hole. This extraction simplifies the overall structure by eliminating complex fixation mechanisms while maintaining the ability to replace the hook, thus reducing both device complexity and material waste.
3Reliability
If tungsten is used for the sinker head, then specific gravity increases and deformation decreases, but the cost increases
Solution Approach 1:
By enabling hook replacement through the through-hole, the design allows the expensive tungsten sinker head to be recovered and reused multiple times. Only the relatively inexpensive hook needs to be replaced when worn, significantly reducing the long-term manufacturing cost while maintaining the high stability and low deformation characteristics of tungsten.
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3
AI summary
One object is to provide a jig head (10, 70) including a sinker head (20) and a hook (30) readily replaceable with new one. A jig head includes: a sinker head (20) including an eye (21) to which a fishing line is to be attached; and a hook portion (30) including a shank (31) fixed on the sinker head at one end thereof, and a bend (32) continuous to the other end of the shank and bent in a predetermined direction. The hook portion includes a wide portion (35) widened to form a plane at the one end of the shank. The sinker head includes: an intermediate member (50) having a hook engagement portion (51) configured to be removably engaged with the wide portion (35); an intermediate member-receiving hole portion (42) configured to receive therein the intermediate member; and an intermediate member-fixing means (60) configured to removably fix the intermediate member (50) in the intermediate member-receiving hole portion (42).