| 摘要 |
An openable window comprises a main frame (1) and a sash (3) top-hinged therein, in which sash is mounted a light screen, particularly a Venetian blind (4), with an adjusting mechanism (5), as well as with a screening device (7, 8) which may be an insect screen mounted in the main frame internally of the window sash. A turning handle (15) is mounted at the internal side of the screening device and is via a shaft (18) connected with the light screen adjusting mechanism in a rotationally locked manner, said shaft being articulated with the adjusting mechanism and telescopically connected with a pivotable member (14). The Venetian blind can thus be operated also with an insect screen placed internally of the window sash and with the window in an opened position for ventilation. The pivotable member can be designed as a ball joint journalled in a double conical bearing or as a ball with a through bore where the shaft is designed as a round bar being integrally with the turning handle.
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