| 摘要 |
PURPOSE: To reduce the weight of a feather shaft and a feather valve of a shuttlecock made of an artificial raw material and to improve elastic characteristics thereof. CONSTITUTION: A shuttlecock having many independent feathers made of an artificial raw material such as synthetic resin or the like is formed in such a manner that a feather shaft 3 disposed in the center of a feather 1 and at least a part of feather valves 4 integrally extended on both sides of the shaft are hollow. |
