Fiber-Reinforced Fishline Guide Frame for Weight Reduction
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Solution Overview
Problem
Conventional fishline guides made of metal materials are heavy, with poor relative strength, rigidity, and bending properties, limiting the performance of fishing rods, especially when multiple guides are mounted along the axial length.
Innovation Solution
A fishline guide is manufactured using a fiber-reinforced prepreg that is thermally hardened and molded into a frame with specific bent portions and lamination structures, including a fixing portion, fishline passing hole portion, and support leg, to achieve lightweight and improved strength characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal frame is used for the fishline guide, then the frame has sufficient strength and rigidity, but the weight increases and bending properties deteriorate
Solution Approach 1:
The patent applies composite materials by combining fiber-reinforced materials (such as carbon fiber or glass fiber) with resin to create a frame that achieves high strength-to-weight ratio. The fiber reinforcement provides the necessary strength and rigidity while the resin matrix binds the fibers together, enabling the frame to be both lightweight and mechanically robust, thus resolving the contradiction between strength and weight.
Solution Approach 2:
The patent changes the material parameters by transitioning from solid metal to composite materials with tailored fiber orientations and resin compositions. This allows optimization of mechanical properties such as tensile strength, flexural rigidity, and weight, enabling the frame to meet strength requirements while minimizing weight through controlled material parameter selection.
2Reliability
If multiple fishline guides are mounted on the fishing rod, then the fishing performance is improved, but the total weight of the fishing rod increases
Solution Approach 1:
By using composite materials for multiple fishline guides, each guide maintains sufficient strength and rigidity for reliable fishline guidance while contributing minimal weight. The high specific strength (strength-to-weight ratio) of composite materials allows multiple guides to be mounted along the rod without significantly increasing the total weight, thus improving fishing performance while controlling overall weight.
3Reliability
If a metal frame is used, then the frame is durable, but the relative rigidity and bending properties are poor
Solution Approach 1:
The composite material structure with fiber reinforcement provides superior relative rigidity compared to metal frames of equivalent weight. The fibers can be oriented to provide stiffness in specific directions, and the resin matrix distributes stresses evenly, resulting in a frame that maintains its structural integrity and rigidity under load while being lighter than metal alternatives.
Solution Approach 2:
The patent applies local quality by varying the fiber orientation, density, and type in different regions of the frame to optimize local rigidity and strength characteristics. This allows the frame to have enhanced rigidity where needed while maintaining overall lightness, improving the stability of the frame's composition under various loading conditions.
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 resulting fishline guide is lightweight with enhanced relative strength, rigidity, and bending properties, allowing for improved fishing rod performance without increasing the overall weight of the fishing rod.
Implementation Method 1
forming a plate member by thermal hardening a fiber-reinforced prepreg
Data Source
AI summary
A set of fishline guides which are configured to be attached to a rod in an axial direction of the rod, each of the set of fishline guides includes a frame including a fixing portion configured to be attached to an outer surface of the rod, a ring holding portion to which a guide ring through which a fishline passes is attached, and a support leg connecting the fixing portion to the ring holding portion, the fixing portion being in a plane transverse to a plane of the ring holding portion. The frame includes a plurality of fiber-reinforced resin layers foamed by laminating a plurality of fiber-reinforced prepregs in which a reinforcing fiber is impregnated with a synthetic resin. A normal line to a plane of each of the fiber-reinforced resin layers forming the ring holding portion coincides with an axial direction of the ring holding portion.