| 摘要 |
PURPOSE: A buoyant board with a propulsion device is provided to be stably balanced on the water and to be controlled the change of directions even if power for getting propulsion force is manually applied. CONSTITUTION: A buoyant board with a propulsion device comprises a main body(10), a through-hole(40), a rotating shaft(55), a spin body(20), and a paddle(30). The main body is made by a high buoyant material like a polymer resin form. The through-hole is formed in the center of the main body and perforates through the top and bottom surfaces of the main body. The rotating shaft is rotatably inserted in the through-hole. The bottom surface of the spin body is fixed at the top of the rotating shaft so that the spin body can be mounted on the top of the main body. One end of the paddle is connected to the other end of the rotating shaft fixed in the spin body to be mounted at the bottom of the main body.
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