| 摘要 |
It consists of a rigid body (1,1') that is intended to be placed into a lockable housing (41) having a through opening, which is assembled around one of the holding straps (31) of the helmet (3), the longitudinal movement of said strap (31) with respect to the body (1) being limited by the locking element (32) of the helmet associated to said strap (31). |
