| 摘要 |
The frame for the viewing screen incorporates a pair of arms which support it in a fillet fitted on a wall, and another such pair which support it against the wall beneath the fillet. Frame pieces meeting at the corners are joined by an angular coupling piece. One arm of the U-shaped frame piece profile (1) has an external outwardly open double hook-shaped track (7), whilst the other arm (4) has a bent shape. The track can accommodate a beam part (11) of a stop component (10), and with another part (14) grips one edge of the projection screen (9). It can also receive one arm of the angular coupling piece, and a base piece for each arm in the pairs. The stop component consists of the beam part which with a hooked part (12) fits in the track in the frame piece. A second beam part can move along and across the first, both beam parts being reciprocally displaceable by means of a screw union (17). |
