Golf Club Shaft with Low-Elastic Tip and Butt Layers
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Solution Overview
Problem
Current golf club shafts face challenges in achieving both high flight distance performance and stability of ball direction, particularly in shorter shafts, where weight and torsional rigidity are critical factors.
Innovation Solution
A golf club shaft design incorporating a bias layer and a straight layer with specific weight distributions and elastic modulus characteristics, including glass fiber reinforced low-elastic layers at the tip and butt ends, optimized for weight distribution and torsional rigidity, to enhance flight distance and directional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a lightweight shaft is used to improve flight distance performance, then flight distance is improved, but directional stability deteriorates
Solution Approach 1:
The shaft is divided into multiple functional layers with distinct purposes: tip low-elastic layer (glass fiber) for weight reduction and feel improvement, middle elastic layer for structural integrity, and butt low-elastic layer for directional stability. Each layer is optimized independently to resolve the contradiction between lightweight design and stability.
Solution Approach 2:
Different regions of the shaft have different material properties tailored to local requirements. The tip region uses low-elastic glass fiber layers for lightweight performance and ball-hitting feel, while the butt region uses similar low-elastic layers specifically for enhancing directional stability. This local differentiation allows the shaft to be lightweight overall while maintaining stability where needed.
2Weight of moving object
If glass fiber reinforced low-elastic layers are added to reduce weight and improve feel, then flight distance and ball hitting feeling are improved, but shaft complexity increases
Solution Approach 1:
The shaft employs composite material construction combining glass fiber reinforced layers (low-elastic) with other fiber materials (elastic). This composite approach achieves weight reduction and improved ball-hitting feel while maintaining structural integrity. The specific arrangement of glass fiber layers at tip and butt regions provides targeted performance enhancement without requiring complete redesign of the entire shaft structure.
Data Source
AI summary
A shaft 6 includes bias layers and straight layers. The bias layers include full length bias layers s1, s2, and butt partial bias layers s3, s4 arranged at a butt end side of the shaft. The straight layers include full length straight layers s7, s9, a tip partial straight layer arranged at a tip side of the shaft, and a butt partial straight layer arranged at a butt end side of the shaft. The tip partial straight layer includes a tip low-elastic layer s6. The butt partial straight layer includes a butt low-elastic layer s8. A low-elastic layer means a layer in which an elastic modulus of a reinforcing fiber is equal to or less than 20 ton/mm2. A shaft length Ls is equal to or less than 41 inches.