Golf Club Shaft Segmented Design for Flexibility
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Solution Overview
Problem
Current golf club shafts lack design flexibility, which limits their ability to meet the diverse needs of golfers, as they typically have fixed specifications and do not allow for significant variations in dimensions and properties along the shaft.
Innovation Solution
A golf club shaft design featuring a plurality of fiber-reinforced resin layers with extending portions and transition portions, where the transition portions have an axial directional length of less than or equal to 25 mm and an outer diameter change of 0.3 mm or more, connecting extending portions, and including intermediate portions that connect transition portions, allowing for varying diameters and wall thicknesses along the shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a golf club shaft is made with a simple tapered shape, then the manufacturing process is simple, but the design flexibility is limited
Solution Approach 1:
The shaft is divided into multiple sections (first section, second section, third section) with different diameter characteristics. Each section can be independently designed and manufactured, allowing flexible customization of shaft properties while maintaining a manageable manufacturing process.
Solution Approach 2:
Different portions of the shaft are given different diameters and wall thicknesses according to their specific functional requirements. The first section has a larger diameter for strength, the second section has a smaller diameter for flexibility, and the third section has intermediate properties, creating local optimization without requiring complex overall restructuring.
2Strength
If the shaft diameter is reduced to improve flexibility, then the shaft becomes more flexible, but the strength decreases
Solution Approach 1:
The shaft is segmented into multiple sections with different diameter specifications. The first section maintains a larger diameter for high strength requirements near the grip, while the second section uses a smaller diameter for enhanced flexibility near the club head, allowing both strength and flexibility to be optimized in their respective locations.
Solution Approach 2:
The shaft wall thickness and diameter are locally optimized for different sections based on their functional needs. The first section has greater wall thickness for strength, while the second section has reduced wall thickness for flexibility, enabling customized mechanical properties without compromising overall shaft integrity.
3Adaptability or versatility
If multiple sections with different diameters are created, then the design flexibility is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The shaft is divided into distinct sections that can be manufactured separately with controlled diameter variations. Each section has specific diameter requirements that can be independently controlled during manufacturing, reducing the overall precision burden compared to a single uniform shaft design.
Solution Approach 2:
The diameter and wall thickness are locally controlled for each section according to its functional requirements. This localized approach allows standard manufacturing tolerances to be applied to each section independently, making it more manageable than requiring precise diameter control throughout the entire shaft length.
Data Source
AI summary
A golf club shaft includes a plurality of fiber reinforced resin layers, a tip end, and a butt end. The golf club shaft also includes a plurality of extending portions each having an axial directional length of greater than 25 mm, and a plurality of transition portions each having an axial directional length of less than or equal to 25 mm and each having an outer diameter changing by 0.3 mm or more. Each of the transition portions connects two of the extending portions. The extending portions include at least one intermediate portion connecting two of the transition portions. The number of the transition portions is greater than or equal to 2, and may be greater than or equal to 3. The extending portions may include a tip extending portion and a butt extending portion.