| 摘要 |
<p>The roller shutter locking mechanism comprises a guide rail (2) for the slats (8,10) of the shutter and a blocking unit (6) located in the guide rail (2) which cooperates with the slats (8,10) when the roller shutter is in the closed position. A locking unit (4) extending from the slats (8,10) of the shutter provides the cooperation between the slats (8,10) and the blocking unit (6), the locking unit (4) having a blocking unit (6) engaging position actuated when the shutter is closed and a disengaged position activated by the shutter being raised from above the blocking unit (6). Between the said neighbouring slats (8,10) there is an expandable telescopic connection (44,46,48). The telescopic connection (44,46,48) provides a mechanism whereby the locking bar (16a,16b) can be retracted without simultaneously applying upward pressure thereto. The telescopic expandability of the gap between the neighbouring slats (8,10) is only actuatable by applying upward pressure from a point above the telescopic connection (44,46,48). <IMAGE></p> |
