Safety helmet capable of absorbing multi-direction impact

Abstract

A safety helmet includes a shell, a flexible frame attached to the shell from inside, and a slide-facilitating member attached to the flexible frame from inside. In virtue of the slide-facilitating member, the shell when receiving incoming impact can slide with respect to a head of a user wearing it, so that the safety helmet can absorb and convert energy of the incoming impact force into other forms of energy, thereby enhancing protection to the user's head.

What is claimed is: 
     
         1 . A safety helmet, comprising:
 a shell;   a flexible frame, being attached to an inner surface of the shell; and   a slide-facilitating medium, being attached to an inner surface of the flexible frame, having two aligned substrates moveable against each other, and serving to allow the shell to slide with respect to a user's head wearing it when the shell receives incoming impact.   
     
     
         2 . The safety helmet of  claim 1 , wherein the two substrates of the slide-facilitating medium each have a low-friction surface, and the low-friction surfaces of the two substrates abut against each other. 
     
     
         3 . The safety helmet of  claim 1 , wherein the two substrates of the slide-facilitating medium are magnets, which face each other with magnetic poles having the same polarity. 
     
     
         4 . The safety helmet of  claim 1 , further comprising a covering; wherein the covering is attached to the inner surface of the flexible frame and the slide-facilitating medium is wrapped by the covering. 
     
     
         5 . The safety helmet of  claim 1 , wherein the shell has a casing and a buffer layer, in which the buffer layer has an outer surface thereof attached to an inner face of the casing, and the flexible frame is attached to an inner surface of the buffer layer, and the flexible frame is also detachable. 
     
     
         6 . The safety helmet of  claim 5 , wherein the flexible frame is attached to the inner surface of the buffer layer through a fastener. 
     
     
         7 . The safety helmet of  claim 6 , wherein the flexible frame has two symmetrical top ribs and a side rib, in which the two top ribs each have a front end thereof integratedly connected to a front end of the side rib, and the side rib has a rear end thereof provided with an adjuster that is used to adjust a circumference defined by the side rib. 
     
     
         8 . The safety helmet of  claim 5 , wherein the inner surface of the buffer layer has a plurality of mortise and an outer surface of the flexible frame has a plurality of tenons, so that the tenons of the flexible frame engage with the mortises of the buffer layer, respectively. 
     
     
         9 . The safety helmet of  claim 8 , wherein the flexible frame has two symmetrical top ribs and a side rib, in which the two top ribs each have a front end thereof integratedly connected to a front end of the side rib, and the side rib has a rear end thereof provided with an adjuster that is used to adjust a circumference defined by the side rib.