Golf Club Shaft Weight Member With Tapered Elastic Protrusions
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Solution Overview
Problem
The challenge in manufacturing golf clubs with weight members is the difficulty in accurately fitting the weight member into the shaft's hollow while ensuring stable attachment, which affects productivity and durability.
Innovation Solution
A golf club design featuring a tubular shaft with a weight member that includes an insertion portion with radially protruding, elastically deformable protrusions, where the outer diameter of the insertion portion is smaller than the shaft's inner diameter, allowing easy insertion and stable attachment through compressive deformation of the protrusions against the shaft's inner surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outer diameter of the weight member is formed with high accuracy to match the inner diameter of the shaft hollow, then the weight member can be stably held in the shaft, but the productivity deteriorates due to the difficulty of insertion
Solution Approach 1:
The invention changes the dimensional parameters of the weight member by providing protrusions that increase the maximum outer diameter beyond the shaft inner diameter, while maintaining an average outer diameter that allows easy insertion. This parameter change enables both stable attachment and high productivity
Solution Approach 2:
The protrusions are made of elastically deformable material that can dynamically adapt during insertion and attachment. The material deforms to allow insertion then rebounds to provide secure holding, enabling both easy assembly and stable attachment
2Ease of manufacture
If the weight member is designed with protrusions made of elastically deformable material with tapered portions, then the insertion into the shaft becomes easier, but the device complexity increases
Solution Approach 1:
The invention applies local quality by providing protrusions only at specific locations on the weight member rather than making the entire surface complex. The protrusions have localized tapered portions with specific geometries that facilitate insertion while maintaining overall structural simplicity
Solution Approach 2:
The weight member is segmented into distinct functional portions: the insertion portion with protrusions for easy insertion, the engaging portion for stable attachment, and the main body. This segmentation allows each portion to be optimized independently for its specific function
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
This design facilitates efficient assembly of the weight member, maintaining productivity and ensuring stable, secure attachment, enhancing the club's balance and counterbalance effect without compromising durability.
Implementation Method 1
each of the protrusions is made of an elastically deformable material... each of the protrusions at least partially contacts the inner surface of the shaft in a state of being compressively elastically deformed
Data Source
AI summary
A golf club comprises a tubular shaft and a weight member. The shaft has a first end having a first inner diameter and a second end on the opposite side thereof. The weight member is attached to the first end, and comprises an insertion portion disposed in the hollow of the shaft, an engaging portion engaged with the first end on the outside of the shaft, protrusions protruding radially from the insertion portion. Each protrusion has a tapered portion in which the radially outwardly protruding height from the insertion portion is decreased toward the second end. The length of each tapered portion is more than 50% of the maximum length of the protrusion, both measured in the shaft axial direction.