Golf Club Shaft Anisotropy for Hook Correction
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Solution Overview
Problem
Golf clubs with detachable heads and shafts often cause discomfort during addressing due to significant angle adjustments, particularly for golfers who do not ground the sole, leading to difficulties in achieving a smooth swing.
Innovation Solution
A golf club design featuring a head with a hosel hole and a shaft that includes a mounting/detaching mechanism allowing the shaft to be fixed at multiple circumferential positions, with an anisotropic shaft producing coupled deformations of bending and torsion, and a sleeve with a rotation-preventing part to regulate relative rotation and prevent axial movement, maintaining a 0-degree angle between the shaft and hosel axis, thereby minimizing discomfort and enhancing hook and slice correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a great angle θ1 between the hosel axis and the shaft axis is used to adjust the hook angle (face angle), then the hook angle adjustment effect is improved, but the golf player experiences discomfort and difficulty in addressing
Solution Approach 1:
The patent divides the angle adjustment function into two independent segments: (1) circumferential position adjustment for hook angle correction, and (2) axial length adjustment for lie angle correction. This segmentation allows the shaft to be positioned at multiple circumferential locations around the hosel axis while maintaining a consistent 0-degree angle between shaft and hosel axes, thereby achieving hook angle adjustment without compromising addressing comfort
Solution Approach 2:
The patent transitions from adjusting the hook angle by changing the angle between shaft and hosel axes (3D angular adjustment) to adjusting it by changing the circumferential position of the shaft around the hosel axis (2D rotational positioning). This dimensional change maintains the 0-degree angle relationship while achieving the desired face angle correction through circumferential positioning
2Ease of operation
If the shaft axis and hosel hole axis are aligned at 0 degrees, then addressing comfort is improved, but the ability to adjust hook angle is reduced
Solution Approach 1:
The patent introduces a dynamic positioning system where the shaft can be rotated to multiple circumferential positions around the hosel axis while maintaining the 0-degree angle alignment. The mounting/detaching mechanism allows the shaft to be fixed at different circumferential locations, providing adjustable hook angle correction without compromising the comfortable 0-degree addressing position
Solution Approach 2:
The mounting/detaching mechanism is designed to provide multiple functions: (1) maintaining the 0-degree angle alignment for addressing comfort, (2) enabling circumferential positioning for hook angle adjustment, and (3) allowing easy attachment and detachment. This multi-functional design resolves the contradiction by integrating both comfort and adjustability into a single mechanism
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 provides a golf club with reduced discomfort during addressing and a high correcting effect for hook and slice, allowing for precise adjustment of the face direction without altering the hook angle, thus improving the golfer's swing smoothness and accuracy.
Implementation Method 1
The shaft has anisotropy producing coupled deformations of bending and torsion
Data Source
AI summary
A golf club 2 is provided with a head 4 having a hosel hole 18 and a shaft 6. The golf club 2 has a mounting/detaching mechanism detachably mounting the head 4 and the shaft 6 to each other. The mounting/detaching mechanism can fix the shaft 6 to the hosel hole 18 of the head 4 at a plurality of circumferential mounting positions. The shaft 6 has anisotropy producing coupled deformations of bending and torsion. Preferably, an angle θ1 between an axis line of the shaft 6 and an axis line of the hosel hole 18 is 0 degree. Preferably, a bending torsional amount of the shaft 6 is equal to or greater than 0.5 degree.