| 摘要 |
A bottom-hung window unit comprises: a mobile frame (2) and a fixed frame (3) hinged to each other along a respective first crosspiece (4); drive means (5) acting between a second crosspiece (6a, 6b), parallel and opposite to the first crosspiece (4) on which the mobile frame (2) is hinged to the fixed frame (3), said drive means (5) being designed to enable the window to be moved to an open configuration, where the second, mobile crosspiece (6a) is away from the respective second, fixed crosspiece (6b), and a closed configuration where the mobile crosspiece (6a) is in contact with the fixed crosspiece (6b); the drive means (5) comprise operating means (7) located on the mobile crosspiece (6a) and having at least two elements (8, 9) for closing the mobile frame (2) against the fixed frame (3), these elements being spaced far apart and being able to be securely coupled to each other by means of strikers (10a, 10b) located on the fixed crosspiece (6b); suitable means (11) act on the operating means (7) and, by operating on the mobile frame (2), enable the window unit (1) to be automatically switched from the open to the closed configuration.
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