| 摘要 |
PROBLEM TO BE SOLVED: To decrease a kalman vortex of various pole type sport gears when players take a full swing. SOLUTION: On sport gears which are composed of a pole part i.e., a golf club, a bat for baseball, a racket for badminton, an oar for boat, a paddle for canoe and a fishing pole and so forth, an airstream exfoliation structure which is composed of a convex 5, a concave, a spiral convex or a projection and so forth is constituted at a handle extending part of sport gears and so forth, i.e., at least a side of pole-shaped part at a direction of which crosses at right angles to a direction of which the pole-shaped part moves mainly. |
