| 摘要 |
A multi-level window shutter has a shutter frame movably supporting at least one first level external shutter panel via an external panel opening mechanism mounted on the shutter frame. The external panel movably supports at least one second level internal shutter panel via an internal panel opening mechanism mounted on the external panel and connected to the shutter frame and to the internal panel for simultaneous displacement of the internal panel upon displacement of the external panel relative to the shutter frame. The panels move between a closed position in which they are in a side-by-side configuration relative to one another in spaced apart parallel planes and an open position in which they are in an over-one-another configuration relative to each other in the spaced apart parallel planes.
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