Golf Shaft Composite Design for Bending Rigidity
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Solution Overview
Problem
Existing composite golf shafts with weights between 50 g-130 g struggle to maintain adequate bending rigidity and often compromise hit feeling.
Innovation Solution
A golf shaft design featuring a metal element tube covered with a fiber reinforced plastic outer layer and an adhesive layer, where the weight of the element tube constitutes 50%-90% of the total shaft weight, ensuring optimal bending rigidity and hit feeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the weight of the golf shaft is reduced to 50 g-130 g, then the weight is reduced, but the bending rigidity is insufficient and hit feeling is deteriorated
Solution Approach 1:
The patent applies composite materials by combining a metal element tube (providing bending rigidity) with a fiber reinforced plastic outer layer (providing weight reduction). This composite structure allows the shaft to achieve both low weight (50 g-130 g) and sufficient bending rigidity, resolving the contradiction between weight reduction and strength maintenance.
Solution Approach 2:
The patent changes the weight distribution parameters by controlling the element tube weight to be 50%-90% of the total shaft weight. This parameter optimization ensures that the metal component provides adequate rigidity while the overall shaft remains lightweight, solving the contradiction between reduced weight and maintained strength.
2Weight of moving object
If the weight of the golf shaft is reduced to 50 g-130 g, then the weight is reduced, but the hit feeling is deteriorated
Solution Approach 1:
The composite structure of metal element tube and fiber reinforced plastic outer layer provides both weight reduction and satisfactory hit feeling. The metal core maintains the necessary rigidity and feedback characteristics, while the lightweight composite construction achieves the target weight range, thereby resolving the contradiction between weight reduction and hit feeling quality.
Solution Approach 2:
By optimizing the weight ratio parameter (element tube weight as 50%-90% of total weight), the patent achieves a balance between lightweight construction and adequate hit feeling. This parameter control ensures that the shaft remains light enough for performance while maintaining sufficient mass in critical areas for feel and feedback.
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 design effectively maintains bending rigidity and provides good hit feeling within the 50 g-130 g weight range, balancing weight reduction with performance requirements.
Implementation Method 1
an adhesive layer interposed between the element tube and the outer layer to bond between the element tube and the outer layer
Data Source
AI summary
Provided is a golf shaft, capable of ensuring bending rigidity required for a golf club and providing good hit feeling in a composite shaft with 50 g-130 g. The golf shaft comprises an element tube made of metal, an outer layer made of a fiber reinforced plastic and covering an outer periphery of the element tube over an entire length of the element tube in an axial direction, an adhesive layer interposed between the element tube and the outer layer to bond between the element tube and the outer layer, wherein weight of a whole including the element tube, the outer layer, and the adhesive layer is 50 g-130 g, and weight of the element tube is 50%-90% of the weight of the whole.