Spring-Nested Lure Weight for Longer Center of Gravity Shift
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Solution Overview
Problem
Conventional lures face limitations in achieving optimal posture in both air and water due to the obstruction caused by coil springs positioned on the tail or head side of the weight, and the limited range of movement of the center of gravity shift mechanism, especially with the integration of additional features like light reflecting and sound emitting mechanisms.
Innovation Solution
A lure design with a hollow body containing a movable weight and an elastic member, such as a coil spring, where the weight is inserted inside the elastic member, allowing for a center of gravity shift mechanism that maximizes movement within a limited range, ensuring proper posture in both air and water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the coil spring is arranged on the tail side of the weight, then the structure is simplified, but the weight cannot move to the end of the tail side and proper aerial posture cannot be achieved
Solution Approach 1:
The weight is inserted inside the coil spring, with the weight positioned at the head side end of the spring. This nested arrangement allows the weight to move freely along the longitudinal axis without being obstructed by the spring coils, achieving maximum movement range to the tail side while maintaining structural compactness.
2Ease of manufacture
If the weight and coil spring are lined up in series, then the assembly is simple, but the center of gravity shift mechanism becomes long and limits the integration of other mechanisms
Solution Approach 1:
The weight and coil spring are arranged in a nested configuration where the weight is positioned inside the spring assembly. This reduces the overall longitudinal length of the center of gravity shift mechanism compared to a series arrangement, creating space for integrating additional mechanisms such as light reflecting or sound emitting features.
3Adaptability or versatility
If additional mechanisms like light reflecting and sound emitting are integrated into the lure, then the lure becomes more appealing to fish, but the position where the center of gravity shift mechanism can be disposed is limited
Solution Approach 1:
The nested arrangement of the weight inside the coil spring minimizes the space occupied by the center of gravity shift mechanism. This compact configuration leaves more room within the lure body for integrating additional functional mechanisms such as light reflecting surfaces or sound emitting devices, enhancing the lure's appeal to fish.
4Ease of operation
If the weight moves to the tail side during casting, then proper aerial posture is achieved, but the coil spring becomes an obstacle and limits the movement range
Solution Approach 1:
The weight is positioned inside the coil spring assembly, allowing it to move freely to the tail side during casting without being obstructed by the spring coils. This nested configuration eliminates the obstruction problem while maintaining the mechanism's ability to achieve proper aerial posture through weight displacement.
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 the lure to achieve excellent aerial and underwater postures, enhancing its flight distance and hit rate, while allowing for the integration of other mechanisms without restricting the movement of the center of gravity.
Implementation Method 1
an elastic member built-in to the inside of the body and energizes the weight forward. The weight is configured to be capable of moving backward against the energizing force of the elastic member
Implementation Method 2
When the lure is cast, the weight compresses the compression coil spring by inertia and moves to the tail side
Data Source
AI summary
A lure includes a body, a weight, a guide member and an elastic member. The body is hollow and has a head in a front portion and a tail in a rear portion thereof. The weight is inside of the body so as to be movable in a front-rear direction. The guide member is in the body and configured to guide movement of the weight in the front-rear direction. The elastic member is in the body and is configured to generate an energizing force to move the weight in a forward direction. The weight is movable backward against the energizing force of the elastic member and one of the weight and the elastic member is inserted into an inside of the other.