| 摘要 |
In accordance with one aspect of this invention, in a mechanism for attaching a rotating plate in a helmet, a positioning member which is of substantially tubular shape and relatively slidable along a guide groove provided in the rotating plate such as a shield plate and shaped into a nearly circular arc has an easily bendable portion provided between a first cut and a second cut which are formed in substantially opposed relation to each other at the upper end and the lower end of the positioning member, respectively. In accordance with another aspect of this invention, in a mechanism for attaching a rotating plate in a helmet, the three engaged openings provided in the guide groove so as to keep in the fully closed condition, in the fully opened condition, and in the defrosted condition, respectively, can relatively hold the positioning member to almost remain its original form, and the arcuated groove disposed in the guide groove can relatively hold the positioning member so as to deform it elastically.
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