Golf Club Head Sole Structure for Lower Center of Gravity
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Solution Overview
Problem
Conventional golf club heads face challenges in concentrating a larger mass at a desired specific position due to restrictions in the shape of the weight member, making it difficult to lower the center of gravity effectively.
Innovation Solution
The golf club head is designed with a first wall portion comprising a first member, a second member, and a third member made of materials with different specific gravities, where the weldability between the first and second materials is superior, allowing the third member to be fixed using the second member, even when the specific gravity difference between the first and third materials is large, enabling a larger mass change at a specific position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a weight member made of material with large specific gravity difference is arranged inside the head main body, then the center of gravity can be adjusted, but the shape of the weight member is restricted and mass concentration at specific positions is limited
Solution Approach 1:
The weight member is divided into multiple segments (first, second, and third members) that can be independently shaped and positioned. This segmentation allows each segment to be optimized for its specific function while collectively achieving the desired center of gravity position and mass distribution without the shape restrictions of a single monolithic weight member.
Solution Approach 2:
The invention transitions from arranging a weight member in a recess (2D surface-level placement) to extending the third member continuously from the first surface to the second surface of the sole wall portion (3D volumetric integration). This dimensional change enables greater mass concentration at specific positions and more effective center of gravity adjustment.
2Quantity of substance
If materials with large specific gravity difference are used, then mass distribution can be optimized, but weldability between materials deteriorates
Solution Approach 1:
The second member acts as an intermediary component between the first member and the third member. It provides a transition zone that enables joining between materials of different specific gravities, allowing the first and third members (which have poor direct weldability) to be effectively connected through the second member, thus achieving optimized mass distribution without compromising manufacturability.
3Stability of the object's composition
If the weight member is accommodated inside the head main body, then structural integration is achieved, but the weight member size is limited and larger mass change at specific positions cannot be provided
Solution Approach 1:
By segmenting the weight member into multiple members that can be independently configured, the invention overcomes the size limitations of a single accommodated weight member. Each segment can be strategically positioned and sized to achieve the desired mass change at specific positions while maintaining structural integration through their combined arrangement in the sole wall portion.
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 allows for a more significant mass distribution, effectively lowering the center of gravity and providing a larger mass change, enhancing the golf club's performance by optimizing the sweet spot height, gravity center height, and moment of inertia.
Implementation Method 1
the first member is fixed to the second member by welding
Implementation Method 2
the third member is fixed to the first member by using the second member
Data Source
AI summary
A golf club head 1 has a first wall portion comprising a first member made of first material, a second member made of second material, and a third member made of material. The third material's specific gravity is different from the first material's specific gravity and second material's specific gravity. The weldability between the first material and second material is superior to the weldability between the first material and third material. The first member is fixed to the second member by welding. The third member is fixed to the first member by using the second member. The third member comprises a portion continuous from a first surface to an opposite second surface of the first wall portion in the thickness direction of the first wall portion.