Hollow Iron Club Head Weight Layout for Low CG and Face Flex
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Solution Overview
Problem
Existing hollow-body iron golf club heads face challenges in concentrating weight low in the head to achieve a lower sweet spot and deeper center of gravity while maintaining sole flexibility and reducing peak stress on the face.
Innovation Solution
The golf club head incorporates a weight made of high-density materials like tungsten and nickel, positioned within the hollow body at an offset from the sole and face, allowing for welding around a partial perimeter to maintain gaps for sole and face flexibility, thus creating a lower sweet spot and deeper center of gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If weight is concentrated low in the iron golf club head to create a lower sweet spot and deeper center of gravity, then launch and carry distance are improved, but sole flexibility is reduced
Solution Approach 1:
The patent introduces an intermediary structure (support structure or recess) between the weight and the sole to prevent direct contact. This mediator allows the weight to be positioned low for improved ball launch while preventing the weight from compromising sole flexibility during the swing and impact phases.
Solution Approach 2:
The internal cavity is segmented into distinct zones: a weight placement zone positioned low in the cavity, a sole flexibility zone maintained by strategic wall thickness variation, and a face impact zone. This segmentation allows each zone to optimize its function independently - weight concentration for launch distance and sole flexibility for impact performance.
2Speed
If weight is concentrated low in the iron golf club head to create a deeper center of gravity, then carry distance is improved, but peak stress on the face at impact increases
Solution Approach 1:
The patent applies local quality by varying the wall thickness at specific locations - thicker walls at the face and sole regions to handle stress, and thinner walls in the weight cavity area to allow weight concentration. This localized structural optimization enables deep center of gravity for carry distance while maintaining face integrity to reduce peak impact stress.
Solution Approach 2:
The club head utilizes composite construction combining hollow body structure with internal weight inserts (such as tungsten or nickel alloys). This composite approach allows precise control over mass distribution to achieve deep center of gravity for carry distance while the hollow body structure provides stress distribution to reduce peak face stress at impact.
3Object-affected harmful factors
If hollow-body construction is used to provide solid impact sound, then sound quality is improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented into distinct phases: forming the hollow body structure, creating internal cavities, positioning and installing weight inserts, and final assembly. This segmentation allows each complex operation to be performed independently using specialized equipment, reducing overall manufacturing complexity while achieving the desired hollow-body construction with solid impact sound.
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 configuration enhances launch and carry distance by providing a deeper center of gravity and lower sweet spot without compromising sole and face flexibility, improving the Coefficient of Restitution (COR) and reducing peak impact stress.
Implementation Method 1
The weight can be welded to the main body
Data Source
AI summary
The disclosed technology includes an iron golf club head comprising a main body defining a hollow, the main body including a toe, a heel, a face, a back face, a top, and a sole, and a weight disposed within the hollow, the weight including a weight front, weight back, weight top, weight bottom, weight first side, and a weight second side, wherein a perimeter of the weight is defined by the weight top, weight first side, weight bottom, and weight second side, wherein the weight is welded to the main body, and wherein the weight is disposed at an offset from the sole defining a first gap between the weight and the sole and at an offset from the face defining a second gap between the weight and the face.