Golf Club Head Weight Attachment via Rotational Socket
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Solution Overview
Problem
Existing golf club weight bodies are not adequately durable for repeated hitting and lack ease and reliability in attachment and detachment processes.
Innovation Solution
A golf club head design featuring a socket with a second hole part made of a hard urethane-based polymer, allowing the weight body to be attached and detached by relative rotation, with specific geometric and material properties to ensure secure engagement and easy handling, including a bottom face forming part of the same material for enhanced durability and attachment reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw mechanism is used to attach the weight body, then the attachment is secure, but the attachment/detachment process becomes complex and time-consuming
Solution Approach 1:
The hole part is divided into three distinct sections: a first hole part for insertion, a second hole part with resistance surfaces for engagement, and a third hole part for securing. This segmentation allows the weight body to be attached and detached through simple rotational movement while maintaining secure fixation during use.
Solution Approach 2:
The attachment mechanism transitions from a static screw thread to a dynamic rotational engagement system. The weight body can be easily inserted and removed by rotating it relative to the socket, with the resistance surfaces providing automatic engagement at specific rotational positions.
2Ease of operation
If the weight body is designed for easy attachment/detachment, then the operation is simple, but the durability under repeated hitting may be compromised
Solution Approach 1:
Different sections of the hole part have different properties: the first hole part allows easy insertion, the second hole part has resistance surfaces that engage with the weight body to prevent loosening under impact, and the third hole part provides additional securing. This local differentiation ensures both ease of operation and durability.
Solution Approach 2:
The resistance surfaces in the second hole part are positioned to engage with the weight body before impact forces can cause loosening. This pre-engagement mechanism cushions against the effects of repeated hitting, preventing the weight body from becoming detached or loose during use.
3Reliability
If the socket material is made harder to withstand hitting, then the durability improves, but the attachment/detachment process becomes more difficult
Solution Approach 1:
The hardness of the socket material is optimized to balance durability and operability. The material is sufficiently hard to withstand repeated hitting forces while remaining soft enough to allow easy insertion and rotational engagement of the weight body. The resistance surfaces are designed with specific geometric parameters that facilitate engagement without requiring excessive force.
4Reliability
If the resistance surfaces are designed with large contact area, then the engagement is more secure, but the attachment/detachment requires more force
Solution Approach 1:
The resistance surfaces provide sufficient engagement security through partial contact rather than full surface contact. The surfaces are positioned to engage at critical points that prevent loosening under impact, without requiring large contact areas that would increase the force needed for attachment and detachment operations.
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 provides a reliable and durable weight body attachment system that withstands repeated impacts and ensures easy attachment and detachment, meeting Golf Rules requirements for adjustability and stability during use.
Implementation Method 1
The resistance surface elastically deformed in the middle of the relative rotation
Implementation Method 2
The resistance surface elastically deformed in the middle of the relative rotation
Data Source
AI summary
A head 4 includes a head body h1, a socket 10, and a weight body 12. The weight body 12 has an engaging part 32. The socket 10 has a first hole part 18 and a second hole part 20. The engaging part 32 can take an engaging position EP and a non-engaging position NP in the second hole part 20 by relative rotation of an angle θ. Hardness Hs of the second hole part 20 is D40 or greater and D58 or less. The second hole part 20 has a resistance surface 84 elastically deformed in the middle of the relative rotation. A longest sectional size of the engaging part 32 is defined as d1, and a distance between the resistance surfaces 84 opposed to each other is defined as F1, a ratio (F1/d1) is 0.935 or greater and 0.965 or less.