| 摘要 |
<p>PURPOSE: To provide a golf club head provided therein with a recess for accommodating a filler for precisely balancing the golf club and for eliminating echo sound upon hitting of a ball. CONSTITUTION: A filler hole 6 is formed din order to set a filled 5 in an inner recess 4, and is closed by a selectively permeable element 7 formed of at least one wall 71 for forming an interface between the inner recess 4 and exterior. When and after the filler is filled through this wall in order to inflate the ball, a pressure increased by the volume of the filler can expel only gas moleculars from the recess 4.</p> |
