| 摘要 |
A helmet (10, fig.1) comprising a plurality of air vents 32 and covers 30, 30a for opening and closing the air vents, the covers configured to hinge outwardly from the helmet to open the air vents. Optionally, the covers may be configured to hinge outwardly from the helmet towards a front of the helmet, so that the covers prevent projectiles which originate from the direction in which a wearer of the helmet is facing from entering the air vents, even when the air vents are open. The helmet may comprise a liner, and a support shell between the outer shell and the liner. The covers may be hingedly attached to a portion of the outer shell, preferably by a living hinge. The covers may be controlled by solid state actuators to open and close the air vents, and an acoustic shot detector configured to control the covers. |
