| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf club head managing method which achieves the control of the quality of golf club heads and golf clubs, so far not done by visual examination based on durability, coefficients of restitution and the like and a golf club head production method, a golf club head, a golf club production method and a golf club. <P>SOLUTION: The quality control system 100 utilized for the golf club head managing method has a primary resonance frequency measuring device 101 and a quality control part 110. The quality control part 110 has a recording part 111 into which are recorded the primary resonance frequencies of the golf club head in an initial state, an input part 113 into which are inputted the primary resonance frequencies of the golf club heads after a specified period passes and a comparison part 112 which compares the data inputted into the recording part 111 and the input part 113 with the primary resonance frequencies in the initial state and within an allowable range. For example, when the measured primary resonance frequencies in the initial state are within the allowable range, the golf club heads are passed. <P>COPYRIGHT: (C)2004,JPO</p> |
