| 摘要 |
PURPOSE: An irregular-bouncing ball is provided to cause irregular bounce by losing a balance of ball by moving a center of mass because of a separate pocket inside a ball in which a separate weight or liquid can be injected. CONSTITUTION: An irregular-bouncing ball comprises a pocket, various weights, or an inner ball which is mounted inside a ball. By changing a location of a center of mass, So a balance of the ball is lost that irregular bounce can be caused. If a separate pocket or a small ball is inserted then liquid such as water can be injected through an injection hole where the external ball and the inner ball are contacted each other. If a separate weight is installed, the invention comprises all shape and material capable of breaking the balance of the ball. [Reference numerals] (A) Air inlet; (B) Liquid inlet
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