Golf Club Head Sole Vibration Control
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Solution Overview
Problem
The frequency of vibration in the sole portion of a golf club head is affected by the presence of a weight member, leading to a decrease in the pitch of the ball hitting sound, as the amplitude of vibration increases and frequency decreases.
Innovation Solution
A golf club head design featuring a recessed portion in the sole portion that houses a weight member, with a placement region connected to the face portion and a rear region inclined upward, enhancing rigidity and positioning the weight member to increase the frequency of vibration and maintain a higher pitch of the ball hitting sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a weight member is provided in the sole portion, then the center of gravity is lowered and hitting angle is improved, but the amplitude of vibration increases and frequency decreases, lowering the pitch of ball hitting sound
Solution Approach 1:
The patent applies local quality by creating a rear region with different structural characteristics (inclined upward) compared to the placement region. This localized structural differentiation allows the rear region to have higher rigidity specifically where needed to control vibration frequency, while the placement region maintains its function for weight member positioning and center of gravity control.
Solution Approach 2:
The patent employs curvature by forming the rear region to incline upward relative to the placement region, creating a curved or inclined surface rather than a flat sole portion. This curved structure increases the moment of inertia and rigidity of the rear region, thereby raising the vibration frequency and pitch of ball hitting sound while still accommodating the weight member in the recessed portion.
2Quantity of substance
If the rear region is made rigid to increase vibration frequency, then the pitch of ball hitting sound is raised, but the complexity of manufacturing increases
Solution Approach 1:
The patent applies segmentation by dividing the sole portion into two distinct regions: a placement region for housing weight members and a rear region with upward inclination. This segmentation allows each region to be optimized independently - the placement region for weight positioning and the rear region for vibration control - while simplifying manufacturing by treating them as separate functional zones that can be formed using standard molding or machining 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 design enhances the frequency of vibration, raising the pitch of the ball hitting sound, while maintaining a lower center of gravity and reducing the likelihood of the weight members protruding, thus improving the hitting angle and flight distance without impairing the design.
Implementation Method 1
the sole portion vibrates due to the impact of hitting the ball, and this contributes to the ball hitting sound. Specifically, the frequency of the vibration of the sole portion affects the pitch of the ball hitting sound
Data Source
AI summary
Provided is a golf club head that is able to suppress lowering of the pitch of a ball hitting sound. The golf club head according to the present invention includes a crown portion, a face portion, and a sole portion having at least one recessed portion. The recessed portion is configured to house a weight member such that the weight member does not protrude externally. The sole portion is provided with a placement region connected to the face portion and to be at least partially placed on a placement surface in a reference state, and a rear region arranged further to a back side in a face-back direction than the placement region and in which the recessed portion is arranged. The rear region inclines upward relative to the placement region toward the back side.