| 摘要 |
PURPOSE: A safety helmet is provided to prevent damage to the skin by blocking ultraviolet ray by with drawing a visor formed in the front of the helmet. CONSTITUTION: A safety helmet comprises a front visor(110) and a plurality of side visors(130). The front visor is installed to come in and out the front surface of the safety helmet. A plurality of side visors are installed to be connected to each other in the side and rear of the safety helmet and are folded and unfolded by a gear unit. The gear unit is composed of a rack gear, a pinion gear(120), and a worm wheel(140). |
