Stair-Shaped Score Lines for Golf Club Head Backspin Control
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Solution Overview
Problem
Golf club heads experience a significant decrease in backspin when shots are taken from the rough due to grass interference between the club face and the ball, which existing score lines fail to adequately address.
Innovation Solution
The golf club head features a plurality of score lines with stair-shaped portions on their side walls, increasing the number of edges that come into contact with the golf ball, thereby enhancing friction and maintaining backspin, particularly in rough conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional straight grooves are formed on the face, then the structure is simple and easy to manufacture, but the backspin amount decreases significantly when shooting from the rough due to grass interference
Solution Approach 1:
The side wall of the score line is segmented into multiple steps (first step, second step, third step) with different depths from the face surface. This segmentation creates multiple edges that can contact the golf ball, increasing friction and backspin while maintaining the overall groove structure.
Solution Approach 2:
Different portions of the score line side wall are given different depths and characteristics. The first step has a shallower depth while the second and third steps extend deeper, creating localized variations in edge contact points. This allows the score line to provide enhanced backspin control specifically in rough conditions without complicating the entire face structure.
2Reliability
If the number of edges contacting the ball is increased to maintain backspin from rough, then friction increases and backspin is maintained, but the manufacturing process becomes more complex
Solution Approach 1:
The multi-step structure creates multiple edges at different depths that dynamically engage with the golf ball during impact. When shooting from the rough, grass interferes with the face, but the multiple edges ensure that at least some edges maintain contact with the ball, dynamically adapting to varying shot conditions and maintaining backspin consistency.
Solution Approach 2:
The score line structure extends into the depth dimension with multiple steps at different depths from the face surface. This vertical dimensionality creates multiple edge contact points without increasing the horizontal complexity of the groove pattern, allowing enhanced backspin while maintaining relatively simple manufacturing processes.
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 stair-shaped score lines effectively suppress the decrease in backspin when hitting from the rough by increasing frictional force and maintaining a high backspin amount, while conforming to competition rules such as the two-circle and area rules.
Implementation Method 1
The stair-shaped score lines effectively suppress the decrease in backspin when hitting from the rough by increasing frictional force and maintaining a high backspin amount
Data Source
AI summary
A golf club head according to the present invention comprises a plurality of score lines on a face, and a stair-shaped portion comprising a plurality of steps formed on a side wall of the score line from a face side end of the side wall in a depth direction of the score line.