| 摘要 |
A solar screen (24), in the form of a Venetian blind with fixed slats (25), consists throughout of two types of thin slats: horizontal slats (25), here called reflecting slats (26, 27, 28), and vertical carrier slats anchored to the reflecting slats. Both types of slat are made of the same substratum of hardened aluminium alloy and possess a high degree of reflectivity. The cross sections of both types of slat are curved for greater rigidity. The horizontal slats (25) have opposite pairs of notches (30, 31, 32) on their longitudinal edges, spaced as on the carrier slats (26, 27, 28). In each of these latter there is a succession of parallel oblique slots (29) to receive and apply an elastic hold to the reflecting slats (25) in the notches. The edge of the slots (29) is varyingly bent to create a zone within which the reflecting slat (25) can freely slide, and with a concavity (33 ) contiguous to a vertex of the slot (29) so that the bent slat (25) is elastically held. At the other end of the concavity (33 ) is a tooth (C) that extends inside the slot. When the first horizontal slat (25) has been fitted into all the respective slots (29) in the carrier slats (26, 27, 28), in alignment with the notches (30, 31, 32), pressure against the longitudinal edge of the horizontal slat (25) towards the vertex of the slot, elastically deforms said slat (25) which can then be fitted into the underlying concavity (33 ); subsequent release of thrust causes an elastic return to fit the slat (25) onto the edge of the slot (29) between the notches (30, 31, 32) and below the tooth (C). The same process is used for all the other reflecting slats (25). |
