| 摘要 |
-22- A slat tensioning mechanism is provided for holding interconnected slats of a louver assembly in a desired angulated position. The slat tensioning mechanism comprises a housing having wheel positioning means for rotationally receiving a bearing wheel. The bearing wheel has an outer circumferential flat wall, and hub means adapted for securement to an end connector of a slat, whereby the bearing wheel and the slat rotate together. A tensioning arm assembly is pivotedly engaged to the housing and has an arm disposed at a predetermined location with respect to the outer circumferential flat wall of the bearing wheel. The arm has a friction surface at a free end thereof for applying a pressure on the outer circumferential flat wall of the bearing wheel for fractionally arresting the bearing wheel at the desired position. The slat tensioning mechanism is adapted to be disposed in an upright of the louver assembly. A cap is secured to an end portion of the upright of the louver assembly and has a button in its top surface adapted for snap-engagement with a corresponding groove of a window sill. A traction corner is provided for releasably assembling a pair of hollow frame members and provides adjustable mating engagement.
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