| 摘要 |
The roller shutter (41) and the flexible screen (52) are wound on parallel drums (40,50) located in the same casing (30) above the window frame (10). The sides of each free end of the rolling shutter and the screen engage in vertical grooves (11,12) in the internal face of the window frame uprights with the shutter concealing the flexible screen. The drums carrying the roller shutter and the flexible screen are located diagonally in the casing with the shutter drum situated above and in front of the screen drum. The sides of the free end of the screen are engaged in corresponding vertical grooves (11) by means of a setting stick (60) fixed at the free end of the screen, whose ends fit tightly in the groove. The screen drum is permanently returned by a drum spring (51) to rotate in the direction of winding.
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