| 摘要 |
A window main frame, particularly for installation in an inclined roof, is provided with a groove extending into the internal edge surface and adapted to receive the edge of an internal panel member and having a width that is substantially larger than the thickness of the panel member. The panel member abuts against the lateral wall closest to the frame opening and a slit is left between the panel member and the other lateral wall of the groove. The panel member is fixed in the groove by means of spring clamps resting against one lateral wall of the groove, and by a resilient tongue directed towards the other lateral wall of the slit the panel member is pressed against the lateral wall, thereby preventing the panel member from being pulled out of the groove.
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