| 摘要 |
The projectile comprises a weighted portion 19, which in use the user strikes to project the projectile and flight means 10 to 13, which may have perforations 15, for stabilising the trajectory of the device when in flight. The projectile is characterised by having a spring 21 located between the portion 19 and the flight means, which allows the whole of the portion to be displaceable with respect to the flight means. The portion may also be guided in its displacement by a plunger 20 and it may have formations, such as ribs 23 or grooves (40, Fig.3). The spring may be one or a plurality (51, Fig.4) of resilient helical wires, a resilient ball (53, Fig.5) or a concertina or bellows member (65, Fig.7). The device may also be equipped with lights or noise generators which are actuated upon impact or during flight, and/or a counter for counting the number of strikes. |
