| 摘要 |
The skylight has a hand grip with longitudinally slidable tongues (5) which combine with a locking piece (6) which is arranged in a frame (17). The locking piece has an opening (7) for the locked position, and at least one opening (8) for ventilation positions. Between the openings, the locking piece has a plane which rises in the direction of the locking motion of the tongue, which is not straight, and which is freely accessible to the moving tongue. A further inclined surface (11) can be provided on the upper limit of the opening for the ventilation position, and the angles and vertices on the surfaces can also be chosen to ensure the window casement can achieve either position through minimal effort on the hand grip. |
