| 摘要 |
PURPOSE: A throwing apparatus is provided, which enables a user to train swing of a tennis ball while controlling an angle of the ball. CONSTITUTION: A throwing apparatus comprises a support stand(1), an installation bar(2), a ball supplying pipe(3), a ball cavity urgent business motor, a rotation roller(5), a ball supply sensor(6), a ball throwing pipe(7), a tension member(8), a leaf spring(9), a ball throwing sensor, a motor for throwing a ball, a rotation roller(12) for throwing a ball, an operating switch, and a battery. The installation bar is respectively stood by a band-shaped plate on the circumference top end portion of the two opposite support stands. The ball supplying pipe axis-connected across each installation bar is vertically combined, a part of one side or the other side thereof is opened, and the opened part is covered with an arc shaped cover(3a).
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