据说在第一次世界大战时,有一小队士兵被敌方包围了,指挥官下令突围,结果14个战士中12人被打残,只剩下两个炊事兵。原来这两个炊事兵是顶着“行军锅”冒着枪林弹雨跑出来的。于是,以后作战的战士头上都要戴上钢盔,结果伤亡大为减少。沿用军用钢盔的防护原理,以后应用到工业生产上去,就成为今天所用的安全帽。安全帽又叫“救命帽”,因为戴上它可以保护劳动者头部在生产中免受外力损伤。安全帽不但广泛用于矿山、建筑部门等行业,而且用于从事电业、消防人员以及摩托车驾驶员。运动员为了防护,也常佩戴安全帽。安全帽为什么能保护人的头部呢?这是人们看到啄木鸟啄树为什么不产生“脑振荡”而得到启示的。原来啄木鸟的颅骨顶部尖而厚,外脑膜与脑髓之间有一空隙,可起到“减振沟”的作用。为此,人们就把安全帽的顶部制成弧形,帽顶中部加厚,外加上加强筋,在帽壳与帽衬中间留有一定的空隙,使安全帽能起到抗冲击和减振作用。同时, It is said that during the First World War, a small group of soldiers was surrounded by the enemy and the commander ordered a breakthrough. As a result, 12 of the 14 soldiers were disabled and only two cooking soldiers were left behind. It turned out that the two cooking soldiers wore the march pot ran brave bullets ran out. As a result, after the warrior soldiers have to wear head helmet, the result greatly reduced casualties. Follow the protective principle of military helmets, after the application to industrial production, it becomes the helmet used today. Helmet is also called “lifesaver hat,” because wearing it can protect the head of the worker from external damage during production. Helmet is not only widely used in mining, construction and other industries, but also for electric, firefighters and motorcycle drivers. Athletes wear protective helmets for protection. Why can the helmet protect the human head? This is why people see the woodpecker pecking tree why it does not produce “brain oscillation” and get enlightenment. The original woodpecker skull top sharp and thick, there is a gap between the outer meninges and brain, can play a “damping groove” effect. To this end, people put the top of the helmet made arc, the central crown thickened, plus stiffeners, cap shell and hat in the middle left a certain gap between the helmet can play a shock and damping effect. Simultaneously,