Golf Club Head Variable Wall Thickness Rigidity Zones
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Solution Overview
Problem
Hollow golf club heads with deformable crown portions struggle to achieve optimal launch angles and rebound properties, often compromising hitting impression and sound quality.
Innovation Solution
The golf club head design features thin-walled, medium-thick-walled, and thick-walled regions on the crown and side portions, along with a high-rigidity sole portion, to create varying rigidity zones that enhance launch angle and rebound, while plasma welding and barycentric design adjustments improve hitting dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the rigidity of the crown portion is decreased to increase launch angle, then the traveling distance is improved, but the hitting impression deteriorates and the hitting sound becomes lower
Solution Approach 1:
The crown portion is divided into multiple regions with different wall thicknesses: thin-walled regions (0.3-0.6mm) at the front for elasticity and launch angle, medium-thick-walled regions in the middle for transition, and thick-walled regions at the back for rigidity and sound quality. This local differentiation allows each region to fulfill its specific function.
Solution Approach 2:
The crown portion is segmented into distinct functional zones based on wall thickness, creating a gradient structure that transitions from flexible front sections to rigid back sections. This segmentation enables independent optimization of each region's mechanical properties.
2Strength
If the wall thickness of the crown portion is reduced to enhance rebound property, then the traveling distance is increased, but the hitting sound quality deteriorates
Solution Approach 1:
Different wall thicknesses are assigned to different locations: thin walls (0.3-0.6mm) at the front for rebound, and thick walls at the back for sound quality. This local quality variation allows the structure to simultaneously achieve high rebound and good sound characteristics.
Solution Approach 2:
The crown portion functions as a composite structure with varying material distribution (different wall thicknesses), combining the benefits of thin-walled elasticity and thick-walled acoustic properties within a single component.
3Speed
If the crown portion is made more flexible to increase launch angle, then the traveling distance is improved, but the structural rigidity of the head deteriorates
Solution Approach 1:
The structure implements local quality variation with thin-walled regions for flexibility and launch angle generation, and thick-walled regions for overall structural rigidity and stability. This allows the head to be flexible where needed while maintaining global structural integrity.
Solution Approach 2:
The solution adds a dimensional aspect to the crown portion by varying wall thickness in the radial direction, creating a three-dimensional gradient structure that provides both flexibility and rigidity through spatial distribution of material properties.
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 achieves a larger launch angle and improved rebound, increasing traveling distance while providing favorable hitting impressions and sounds, as demonstrated by impact tests and player evaluations.
Implementation Method 1
a hollow golf club head which provides a large launch angle of a ball and a good rebound property when hitting a ball
Implementation Method 2
a high-rigidity region on a face side of the sole portion
Data Source
AI summary
This invention provides a hollow golf club head having a face portion, a crown portion, a sole portion, and a side portion. The head has 0.3 to 0.6-mm thick thin-walled regions on the face side of the crown portion and the face side of the side portion, a medium-thick-walled region thicker than the thin-walled region of the crown portion at the back of the thin-walled region, and a high-rigidity region on the face side of the sole portion.