Resin Collar Member for Spinning Reel Thermal Stability
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Solution Overview
Problem
Conventional spinning reels face challenges in stabilizing the sliding feeling of the spool shaft due to difficulties in processing metal collar members and increased sliding resistance and rattling caused by the linear expansion of resin materials at varying temperatures.
Innovation Solution
A collar member made from a resin material with a linear expansion coefficient between 10×10−6 (1/° C.) and 50×10−6 (1/° C.), potentially reinforced with carbon, which allows for easier surface roughness adjustment and reduced weight, thereby stabilizing the sliding feeling and minimizing temperature-induced rattling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the collar member is made of metal such as brass, then the strength and durability are improved, but it is difficult to precisely and smoothly process the surface roughness of the inner surface
Solution Approach 1:
The collar member is made of a composite material consisting of a resin base material reinforced with inorganic particles (such as glass fibers or metal particles). This composite structure provides the strength and durability of metal while maintaining the ease of precision surface processing characteristic of resin materials.
Solution Approach 2:
The invention changes the material parameters by selecting specific resin materials with controlled linear expansion coefficients (10-50×10−6/°C.) and incorporating inorganic particles with specific properties. This parameter optimization allows achieving both mechanical strength and surface processing precision simultaneously.
2Ease of manufacture
If the collar member is made of resin material, then the ease of manufacture and weight reduction are improved, but the linear expansion coefficient becomes large causing sliding resistance and rattling to increase
Solution Approach 1:
The invention carefully selects resin materials with linear expansion coefficients within the specific range of 10-50×10−6/°C. This parameter control prevents excessive thermal expansion and contraction, thereby maintaining stable sliding characteristics and reducing rattling while preserving the manufacturing advantages of resin materials.
Solution Approach 2:
By combining resin materials with controlled expansion properties and inorganic particles, the invention creates a composite collar member that reduces the overall linear expansion coefficient compared to pure resin, thereby improving sliding stability while maintaining the lightweight and easy manufacturability of resin-based materials.
3Manufacturing precision
If the collar member is processed to have a larger thickness for accurate processing, then the manufacturing precision is improved, but the collar member and bearing become larger in diameter and weight
Solution Approach 1:
The use of composite materials with inorganic particles dispersed in the resin matrix enhances the mechanical strength and stiffness of the collar member. This allows achieving the required manufacturing precision and structural integrity with a thinner wall thickness, thereby reducing the overall weight and diameter of the collar member and bearing assembly.
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 resin collar member with controlled linear expansion and carbon reinforcement reduces sliding resistance and rattling, providing a stable sliding experience for the spool shaft across temperature ranges while maintaining a lightweight and precise design.
Implementation Method 1
the linear expansion coefficient of the collar member becomes large. Therefore, at low or high temperature, sliding resistance and rattling increase due to shrinkage or expansion of the inner and outer diameters of the collar member
Implementation Method 2
the carbon fiber should be 10-25 weight percent of the resin material. This configuration can suitably increase the strength of the collar member
Implementation Method 3
the outer circumference of the spool shaft slides against the inner circumference of the collar member in a case where the spool shaft moves back and forth relative to the reel body
Data Source
AI summary
A collar member is used for a spinning reel. The spinning reel has a reel body, a spool shaft that moves in a front-back direction with respect to the reel body, a pinion gear that rotates around the spool shaft, a rotor nut that rotates integrally with the pinion gear, and a bearing that is disposed between the spool shaft and the rotor nut in a radial direction and rotatably supports the rotor nut. The collar member is disposed between the spool shaft and the bearing in the radial direction. The collar member is formed by a resin material that has a linear expansion coefficient of 10×10−6 (1/° C.) or more and 50×10−6 (1/° C.) or less.