Impact resistant structure of safety helmet

#The present invention relates generally to a safety helmet, and more particularly to an impact-resistant structure of the safety helmet.

#The conventional safety helmet is generally provided with an impact-resistant layer for protecting the head of a wearer of the safety helmet. The impact-resistant layer is made of an expanded polystyrene material which is relatively rigid and poor at absorbing the shock. As a result, the conventional safety helmet can not provide effectively its wearer the protection against the shock. In light of the rigidity of the expanded polystyrene material of the impact-resistant layer, the conventional safety helmet is not comfortable to wear.

#As shown in FIG. 1, a prior art safety helmet has a shell 1 and an inner body 2 which is made of the expanded polystyrene and is fixed with the shell 1. The inner body 2 is provided with a hollow air sac 3 of a plastic material to give it an added comfort to the head wearing the safety helmet. The prior art safety helmet is relatively large in volume and therefore takes up a relatively large storage space. In addition, the prior art safety helmet is not cost-effective. Furthermore, the inner body 2 is not effective in absorbing shock. The air sac 3 is susceptible to a permanent deformation, which causes discomfort to a wearer of the safety helmet. In addition, the permanent deformation of the air sac 3 is a culprit for shortening the service life span of the safety helmet.

#FIG. 1 shows an exploded view of a safety helmet of the prior art.

#FIG. 2 shows an exploded view of a safety helmet of the present invention.

#FIG. 3 shows a sectional view of the safety helmet of the present invention in combination.

#As shown in FIGS. 2-5, a safety helmet embodied in the present invention comprises a shell 4, an impact-resistant structure 5, and a lining 6.

#The shell 4 is made of a rigid material. The impact-resistant structure 5 is attached to the inner surface of the shell 4 by an adhesive or Velcro device which is also known as a magic tape. The impact-resistant structure 5 is formed of an impermeable fabric 51, a plurality of breathable foam bodies 52 enclosed by the impermeable fabric 51, and an air valve 54 attached to the impermeable fabric 51 for inflating or deflating the breathable foam bodies 52. The lining 6 is made of a fabric or artificial sponge and is fastened to the impact-resistant structure 5.

#The breathable foam bodies 52 are arranged at intervals and are independent of one another. The breathable foam bodies 52 serve to provide the safety helmet of the present invention with a shock-absorbing effect as well as a wearing comfort. The breathable foam bodies 52 can be inflated or deflated by the air valve 54 for adjusting the air density of the breathable foam bodies 52. In addition, the breathable foam bodies 52 are capable of self-adjustment of shape by virtue of the physical property thereof, so as to accommodate the head of a wearer of the safety helmet of the present invention.