| 摘要 |
A safety helmet includes a shield movable relative to a shell from an open to a closed position, and vice-versa through operation of a shield actuation system. When in the closed position, the shield actuation system permits the shield to be aligned substantially flush with the shell. Further, the shield actuation system allows the shield to be opened through a manual process that includes pushing on a lever or button to initially release (e.g., pop out) the shield and then rotate the shield into the open position. The shield actuation system includes a number of plates with at least two of the plates in kinematic cooperation for allowing the shield to pop out and then rotate relative to the shell.
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