| 摘要 |
<p>A floatable structure propelling mechanism (3) is combined with a floatable structure (1) filled with helium gas to propel the floatable structure for flying in the air. The propelling mechanism (3) has a rubber cord (5) to be twisted to store driving energy. When the rubber cord (5) is untwisted, a double crankshaft (7) is caused to rotate about a crank journal (7a) whereby crank pin portions (7b, 7b') are caused to make rotary motion, which is transmitted through connecting rods (8, 9; 8', 9') to lateral fins (2). The lateral fins are pivoted by hinges (10) so that the fins are caused to reciprocatingly swing vertically as a result of the rotary motion of the crank pin portions, whereby the floatable structure (1) can fly and advance in the air. <IMAGE></p> |
