Dust-proof lock element for e.g. window opening of building, has perpendicular air chambers provided at left and right sides of element, and horizontal air chamber provided above element that is fixed in wall opening and/or in door frame

摘要

The element (5) has two perpendicular air chambers (1) provided at left and right sides of the element, where the element is made of textile fabric or foil. A horizontal air chamber (2) is provided above the element, where the element is fixed in a wall opening and/or in a door or window frame by the chambers. The horizontal air chamber is strengthened by a plate (7) corresponding to dimensions of the horizontal air chamber, where the plate is extendable and/or shortenable. The perpendicular air chambers represent a geometry that encloses the wall opening.