Patent ID: 8091149
Filing Date: 2012-01-10
Classification: A42B

Abstract:
1. A helmet comprising: a helmet main body; a first plate fixed onto an outer surface of the helmet main body; a shield plate attachably and detachably installed on the first plate; a second plate combined with the first plate and moving to a locking position or an unlocking position with respect to the first plate; and a spring for pressurizing the second plate toward the locking position, wherein the first plate includes: a supporting sphere formed in a circular shape; a first sliding unit formed after a part of a circumferential wall of the supporting sphere is removed; a protruding partition wall extending from an outside of the supporting sphere and formed into a circular arc shape concentric with a circumferential wall of the supporting sphere; and a second sliding unit formed in one end portion of the protruding partition wall, the shield plate includes: a rotation shaft rotatably combined with the supporting sphere; a first rotating hook formed in the rotation shaft; a click protruding unit engaged with a shield rotating guide groove formed along an outer periphery of the protruding partition wall; and a second rotating hook formed in the click protruding unit, the second plate includes: a first locking unit engaged with the first sliding unit and a second locking unit engaged with the second sliding unit, and spaces where the first and second sliding units are formed extend toward the outside of the circumferential wall of the supporting sphere and form a slide guide groove, the second plate slides linearly along the slide guide groove, and the first and second rotating hooks are engaged with or disengaged from the first locking unit and the second locking unit respectively in the first and the second sliding units, thereby moving between the locking position and the unlocking position, wherein the first plate includes: a first structural coupling groove formed on an upper rear surface of the first sliding unit; a second structural coupling groove formed on an upper rear surface of the second sliding unit; and a third structural coupling groove formed on an inner peripheral rear surface of the protruding partition wall, the second plate includes: a first structural coupling hook, a second structural coupling hook and a third structural coupling hook formed on places each corresponding to the first, second and third structural coupling grooves, and the first to third structural coupling hooks are inserted into a rear surface of the first plate from a top surface thereof so as to be slid into the first to third structural coupling grooves respectively.