Golf Shaft Set Weight Distribution for Torque Control
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Solution Overview
Problem
Conventional golf club shaft sets lack a systematic approach to optimize shaft weight and torque distribution across varying club lengths and loft angles, leading to inconsistent feel and performance among different clubs.
Innovation Solution
A shaft set comprising a first shaft, a second shaft shorter than the first, and a third shaft, with specific weight distributions in bias and straight layers, where the weight of the butt partial bias layer increases and the tip partial bias layer decreases as the shaft shortens, maintaining a constant full-length bias layer weight and adjusting the tip end width to achieve uniform shaft weights and reduced torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shaft length is decreased, then the club becomes more maneuverable and suitable for higher loft angles, but the shaft weight and torque become inconsistent across the set
Solution Approach 1:
The patent applies local quality by varying the weight of bias layers and straight layers at different axial positions (tip partial, full length, butt partial) of the shaft. Specifically, the tip partial bias layer weight decreases as shaft length decreases, while the butt partial bias layer weight increases, and the full length bias layer weight remains substantially constant. This localized differentiation maintains consistent overall shaft weight and torque across clubs of different lengths, resolving the contradiction between maneuverability and weight consistency.
2Weight of moving object
If the shaft weight is uniformly reduced across all clubs, then swing speed improves, but torque control and directional stability deteriorate
Solution Approach 1:
The patent employs parameter changes by systematically adjusting the weights of different layers (tip partial bias, full length bias, butt partial bias, and straight layers) as shaft length varies. The full length bias layer weight is maintained substantially constant, while tip partial bias layer weight decreases and butt partial bias layer weight increases for shorter shafts. These parameter adjustments enable the shaft to achieve lightweight construction for faster swing speed while maintaining controlled torque and directional stability through optimized layer distribution.
Data Source
AI summary
A shaft set 2S includes a first shaft SF1, a second shaft SF2 shorter than the first shaft SF1, and a third shaft SF3 shorter than the second shaft SF2. At least the second shaft SF2 and the third shaft SF3 each include butt partial bias layers s3 and s4. Weights of the butt partial bias layers s3 and s4 are increased as the shaft is shortened. At least the first shaft SF1 and the second shaft SF2 each include tip partial bias layers s10 and s11. Weights of the tip partial bias layers s10 and s11 are decreased as the shaft is shortened.