Fishing Rod Fitting Mounting Thread Resin Crack Prevention
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Solution Overview
Problem
Conventional fishing rods experience cracking in the resin layer near the mounting portion of fittings due to bending, leading to loose fixation and visibility of cracks, which affects the perceived mounting strength.
Innovation Solution
A fishing rod design where a thread-like part-fixing member is wound directly on the mounting portion, and a cover member is placed radially outside to cover the area where the part-fixing member overlaps, with a resin layer penetrating into the gaps, masking any cracks and providing secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fitting is mounted on a rod body by winding a mounting thread around the rod body and the fitting leg, then the fitting can be fixed on the rod body, but a large amount of bending may cause cracking in the resin layer near the mounting portion and the fixing may loosen
Solution Approach 1:
The patent divides the mounting structure into multiple functional layers: the mounting thread for initial fixation, the reinforcing member for structural support, and the resin layer for final bonding. This segmentation allows each component to perform its specific function optimally without compromising the others.
Solution Approach 2:
The reinforcing member is installed before the resin layer is applied. This preliminary action provides pre-support to the mounting portion, preventing resin layer cracking during bending before the resin has fully cured and taken its bonding strength.
2Strength
If a reinforcing member is provided near the mounting portion to prevent resin layer cracking, then resin layer integrity may be improved, but the fitting fixation may loosen because the reinforcing member is fixed with the mounting thread rather than directly fastening the fitting leg
Solution Approach 1:
The patent merges the functions of the mounting thread and the reinforcing member by having them work together in a coordinated manner. The mounting thread provides initial fixation while the reinforcing member provides structural support, and both are integrated into a single mounting process that ensures neither function compromises the other.
Solution Approach 2:
The mounting structure uses a composite approach combining different materials and functions: the mounting thread (flexible, for initial fixation), the reinforcing member (rigid, for structural support), and the resin layer (adhesive, for final bonding). This composite structure achieves both fixation stability and resin layer integrity.
3Strength
If the mounting portion is reinforced to prevent cracking, then resin layer integrity may be improved, but the complexity of the mounting structure increases
Solution Approach 1:
The reinforcing member is placed only at the critical mounting portion where the fitting leg contacts the rod body, rather than throughout the entire rod body. This localized reinforcement provides the necessary structural support exactly where needed while minimizing the addition of components and complexity.
Data Source
Figure 1
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AI summary
One object of the present invention is to provide a fishing rod (10) wherein a fitting (13, 15) can be stably and securely fixed on a rod body with a mounting thread (21) and cracking in a resin layer is less visible to a user. A fishing rod according to an embodiment of the present invention includes a rod body (11), a fitting (13, 15) mounted on an outer circumferential surface of the rod body via a mounting portion (L) of the fitting, and a thread-like part-fixing member (21) wound around the mounting portion and the rod body across a predetermined width in an axial direction of the rod body. On the surface of the part-fixing member is provided a cover member (22) which may be opaque.