| 摘要 |
An antibandit shutter comprising a closed frame made up of a lower housing (1), an upper head (3) and two side mullions (2) defining a space which can be opened or closed wherein said opening or closing is effected by a plurality of elongate slats adapted (4) to move from a retracted position within the confines of said lower housing to an expanded and raised position substantially closing off said space wherein said slats are guided along the mullions of said frame by a raising means comprising a plurality of crossed first and second lever arms in the form of a lazy tongs mechanism wherein said first lever arms are formed by the edges of said slats and said second lever arms are formed from slave levers (7).
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