| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball throwing device which is easier to use and can continuously shoot balls of varied kinds. SOLUTION: The ball throwing device has a type of ball selection means 43 having a non-spin setting operation part 43e for balls and a multiple spin direction setting operation parts 43a-43d and 43f-i for diversifying the direction of spinning balls and a type of ball control means which is surrounded by the spin direction setting operation parts 43a-43d and 43f-i centering around the non-spin setting operation part 43e to make the directions of spinning balls match with those almost the same as the directions of the positions of the individual spin direction setting operation parts relative to the position of the non-spin setting operation 43e. COPYRIGHT: (C)2007,JPO&INPIT
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