| 摘要 |
<p>A vent (10) comprising a fixed frame (3) and an opening member (5) attached to the fixed frame (3) by hinges (7,12), the opening member (5) being movable between a position closing the vent (10) and an open position by drive means (9), wherein three hinges (7,12) support three sides of the opening member (5) and a fourth side is driven by the drive means (9). As a result, smoother opening of such a vent occurs without the need for a second drive means.</p> |
