Patent ID: 9370217
Filing Date: 2016-06-21
CPC Classification: A42B

Claim Text:
1. A helmet comprising, on an outer surface of a shell constituting an outermost layer of the helmet, a ventilation duct which covers ventilating holes provided so as to pass through between an inner surface of said helmet and said outer surface and which guides air circulated through said ventilating holes; wherein said ventilation duct comprises a left duct part and a right duct part arranged respectively on the left and right sides of said shell, and a central duct part arranged between said left duct part and said right duct part; said left duct part and said right duct part have a structure in which said left duct part and said right duct part are held by engaging support members arranged at positions of said left duct part and said right duct part on the outer surface of said shell, and by said central duct part; said engaging support members each comprise a first engaging support part and a second engaging support part; the first engaging support part prevents detachment of said left duct part and said right duct part from the outer surface of said shell towards an outer side in a thickness direction of said shell, and also limits at least one of movement in a front direction and movement in a rear direction of said left duct part and said right duct part on said outer surface, and the second engaging support part limits at least one of movement in a left direction and movement in a right direction of said left duct part and said right duct part on said outer surface; said left duct part and said right duct part each comprise a first engaging part which engages with said first engaging support part, a second engaging part which engages with said second engaging support part, and an insertion portion which is inserted into an insertion opening provided in each of left and right side portions of said central duct part; and said central duct part, by being fixed to said outer surface via an installation part in a state where said insertion portions have been inserted into said insertion openings, keeps said insertion portions in the inserted state by said insertion openings and said outer surface, as well as holding the engaged state of said first engaging parts and the engaged state of said second engaging parts of said left duct part and said right duct part, and the installed state of said central duct part on said outer surface, and thereby fixing said left duct part and said right duct part to said outer surface.