| 摘要 |
PURPOSE: An air cushion which can be utilized as a ball is provided to give amusement by converting the cushion into a ball using compression and expansion of air. CONSTITUTION: An air cushion which can be utilized as a ball can utilize the cushion as the ball. If a user wants to convert the cushion into the ball, the user needs to pull a pulling unit(1) then the exit of the ball is pulled and the air enters into the inside the ball and is gradually swelled. The air is gradually indulged from the central part of the cushion and forms the ball by being tighten and bound to form the ball.
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