| 摘要 |
PURPOSE: A ball with separable multi-staged rods is provided to improve economical characteristic by changing the assembled state of the ball according to environment and places. CONSTITUTION: A ball includes separable multi-staged rods(10, 20, 30). Fixed protrusions(21, 31), a spring, first and second grooves(11, 22), a third groove(41), and a ball(40) are formed to the multi-staged rods. The multi-staged rods are multi-inserted. The spring is arranged in a contacting space of the protrusions and the rods. One fixed protrusion is fixed to the first groove. One rod is fixed to the second groove.
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