| 摘要 |
A casing for a projection screen system that includes a fascia removable from the spine of the casing without the use of tools. The casing is provided with a roll locking hinge formed by a cooperating lip and socket furnished on the fascia and the spine. The roll locking hinge is configured to permit the fascia to be preliminarily mated with the spine when the fascia is disposed in an upwardly rotated arrangement. After the preliminary mating of the fascia with the spine, when subsequently rotated downward relative to the spine, the fascia is locked to the spine by the roll locking hinge, thereby preventing inadvertent fascia removal.
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