| 摘要 |
PURPOSE:To prevent an oscillating mechanism from the damage caused by the loaded abnormal force by making a metallic guard net unmovable even if a propeller and a drive unit of the propeller are given rotary oscillation. CONSTITUTION:A metallic guard net 1 is fast fixed on a stand 2 in a fixing part 6. Inside the guard net, there are the upper part of the stand 2, a propeller- driving unit 3 with an oscillating button 4, and a propeller 5 driven by the unit. Even if the propeller and the propeller-driving unit 3 are given rotary oscillation, the metallic guard net is unmovable. Consequently, even in the case of turning over, an oscillating mechanism inside the propeller-driving unit 3 is free from abnormal force, and prevented from the damage. |
