Golf Club Head Sole Thin-Wall Weight Distribution
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Solution Overview
Problem
Existing golf club heads face a challenge in lowering the center of gravity while maintaining excellent rebound performance, especially when hitting at a lower hit point, due to increased wall thickness in the lower portion which affects the club's performance.
Innovation Solution
The golf club head design incorporates a weight member with a greater toe-heel directional length than top-sole directional length, coupled to a body portion with a sole thin-wall portion that has a specific wall thickness, allowing for improved weight distribution and rebound performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If more weight is allocated to the lower portion of the head by disposing a weight member there, then the center of gravity is lowered, but the wall thickness of the lower portion is increased and the rebound performance deteriorates
Solution Approach 1:
The patent applies local quality by creating a sole thin-wall portion with reduced wall thickness (0.8mm to 4.6mm) in the lower portion of the head where the weight member is disposed. This localized thinning allows the weight member to lower the center of gravity while the reduced material thickness maintains rebound performance by allowing sufficient flexing of the sole during impact.
2Weight of moving object
If the wall thickness of the lower portion is increased to accommodate the weight member, then the center of gravity is lowered, but the rebound performance in hitting at a lower hit point deteriorates
Solution Approach 1:
The invention implements local quality by selectively reducing the wall thickness in the sole thin-wall portion to 0.8mm to 4.6mm, creating a localized area of reduced stiffness that enables rebound performance at lower hit points while the weight member in this region continues to effectively lower the center of gravity.
Solution Approach 2:
The patent addresses the contradiction by transitioning from a uniform three-dimensional wall thickness to a variable thickness profile, creating a sole thin-wall portion that is thinner in the vertical dimension while maintaining horizontal coverage. This dimensional variation allows simultaneous achievement of weight distribution and rebound performance.
Data Source
AI summary
A golf club head includes a face portion including a striking face, a body portion, and a weight member disposed in the body portion. The body portion includes a weight receiving portion on which the weight member is disposed. A toe-heel directional length of the weight member is greater than a top-sole directional length of the weight member. The body portion includes a sole thin-wall portion whose outer surface constitutes a part of a sole surface and whose wall thickness is 0.8 mm or greater and 4.6 mm or less. An inner surface of the sole thin-wall portion includes: a weight contact surface constituting a part of the weight receiving portion and being in contact with the weight member; and a space facing surface located on a face side of the weight contact surface and facing an empty space. The weight member is not exposed outside the golf club head.