Three-Layer Putter Face Insert for Directional Stability
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Solution Overview
Problem
Putter-type golf club heads with soft face inserts face challenges in maintaining high directional stability and rolling distance while providing a soft impact feeling, as they often result in undesirable spin or direction deviation.
Innovation Solution
A three-layer face insert structure is implemented, with specific hardness and rebound resilience relationships between the layers to balance soft impact feeling and directional stability, comprising a softer second layer sandwiched between relatively harder first and third layers, optimizing the Shore D hardness and rebound resilience values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a soft face insert is used, then impact feeling becomes softer, but directional stability and rolling distance degrade due to deviation and unnecessary spin
Solution Approach 1:
The face insert is divided into three distinct layers with different hardness and rebound resilience characteristics. The first layer (contact layer) has higher hardness and rebound resilience for directional stability, the second layer (intermediate layer) has lower hardness for soft impact feeling, and the third layer (back layer) has higher hardness for structural support. This segmentation allows each layer to perform its specific function independently, resolving the contradiction between soft impact feeling and directional stability.
Solution Approach 2:
Different regions of the face insert are given different material properties to optimize local functions. The front surface layer is made harder to maintain directionality where the ball first contacts, while the intermediate layer is made softer to provide cushioning. This local differentiation of material properties allows the insert to simultaneously achieve soft impact feeling and high directional stability.
2Reliability
If a hard face insert is used, then directional stability is maintained, but impact feeling becomes harsh
Solution Approach 1:
The face insert is divided into three distinct layers with different hardness and rebound resilience characteristics. The first layer (contact layer) has higher hardness and rebound resilience for directional stability, the second layer (intermediate layer) has lower hardness for soft impact feeling, and the third layer (back layer) has higher hardness for structural support. This segmentation allows each layer to perform its specific function independently, resolving the contradiction between soft impact feeling and directional stability.
Solution Approach 2:
The face insert uses a composite structure combining materials with different hardness and rebound resilience properties in a three-layer configuration. This composite approach allows the insert to exhibit both hard characteristics (for directionality) and soft characteristics (for impact feeling) simultaneously, resolving the contradiction between these opposing requirements.
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 solution achieves a soft impact feeling while maintaining high rolling distance and directional stability, reducing unnecessary spin and improving the overall golf ball rolling performance.
Implementation Method 1
a face insert made of elastic material attached to the concave portion of the head main portion
Implementation Method 2
each of the first layer, the second layer, and the third layer having a hardness of h1, h2, and h3 and a rebound resilience of r1, r2, and r3
Data Source
AI summary
The present invention relates to a putter-type golf club head with a face on a front side to hit a golf ball comprising a head main portion provided with a concave portion on a side of the face, and a face insert made of elastic material attached to the concave portion of the head main portion, the face insert having a three-layer structure comprising of a first layer disposed at the front, a third layer disposed at the rear, and a second layer disposed between the first layer and the third layer, each of the first layer, the second layer, and the third layer having a hardness of h1, h2, and h3 and a rebound resilience of r1, r2, and r3, and the first layer, the second layer, and the third layer satisfying the following relations:h2<h1<=h3,r1>r2,andr1>r3.