The present invention relates to a multi-functional safety helmet for multi-purpose, which can safely protect the head (head) of the wearer from external impact and between the outer layer (1a) and the inner layer (1b) in order to reduce the volume when carrying or storage And a rubber part or synthetic resin air-expandable endothelial body 1 having a space part 1c formed therein and having an air inlet hole 1i through which the outer layer part 1a and the inner layer part 1b obliquely upward. The upper sheath 2a and the middle sheath 2b having the mount 6 in which the shaft 5 of the reflective optical vane 3 is ball-joined, and the air inlet 8 which is obliquely upwardly intersected with the visor 7 Versatile and versatile safety helmet consisting of a high-strength hard foam jacket (2), in which the lower sheath (2c) is disassembled and assembled by screwing (or other conventional coupling). , Motorcycle or bicycle helmets, water helmets In some cases, when the outer shell is made of bulletproof materials such as military helmets for various training purposes, it is possible to demonstrate remarkable economic and comfort safety in terms of cost-effectiveness such as weight, volume, and performance compared to existing military helmets. A designed hard hat was developed.
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