Fishing Rod Guide Frame Groove for Stronger Ring Bonding
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Solution Overview
Problem
Conventional fishing rod guides face challenges in achieving a strong attachment force between the guide frame and ring due to limited contact area and difficulty in positioning, leading to potential cracking and weight inefficiencies.
Innovation Solution
The guide for a fishing rod features a guide frame with an inner circumferential groove and opposing surfaces of different shapes, allowing for increased contact area and easier alignment, filled with adhesive to enhance attachment force and reduce weight by minimizing protruding parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a flat surface configuration is used between the frame and guide ring, then positioning is difficult in the central axis direction, but the contact area is limited
Solution Approach 1:
The patent applies curvature by forming an outer circumferential groove with a curved surface on the guide ring and configuring the frame to contact this curved surface. This curved configuration simultaneously increases the contact area between the frame and guide ring while providing natural positioning in the central axis direction, resolving the contradiction between limited contact area and positioning precision.
2Area of stationary object
If the frame is made with a circular cross section to match the curved peripheral groove, then the contact area increases, but the frame becomes thicker and heavier
Solution Approach 1:
The patent applies local quality by making the frame's cross-sectional shape asymmetric rather than uniformly circular. The frame has a larger cross-sectional area at the portion contacting the guide ring to ensure sufficient contact area and attachment force, while having a smaller cross-sectional area at other portions to reduce overall weight. This localized variation in cross-sectional properties resolves the contradiction between increasing contact area and reducing weight.
3Strength
If adhesive space is increased to improve attachment force, then the frame and guide ring need more clearance, but positioning becomes more difficult
Solution Approach 1:
The curved surface configuration of the outer circumferential groove provides natural positioning in the central axis direction, which maintains positioning precision even when adhesive space is increased. The curvature creates a self-aligning feature that ensures proper positioning while allowing sufficient clearance for adhesive application, thus resolving the contradiction between attachment force and positioning precision.
Data Source
AI summary
A guide for a fishing rod includes a rod body, a guide ring configured to have a fishing line inserted therethrough, and a guide frame fixed to the rod body, extending outward in a radial direction of the rod, and holding the guide ring. The guide frame having an inner circumferential groove and a frame comprising a ring-shaped wire material holding the guide ring, a supporting leg portion fixed to the rod body and connecting to and supporting the frame, and a first opposing surface of the inner circumferential groove opposing at least a portion of the ring. A second opposing surface of the ring opposes the first opposing surface, the first and second opposing surfaces having different shapes.