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A platform for research: civil engineering, architecture and urbanism
Window covering positional adjustment apparatus
The covering has a first rail 3, a positional adjustment mechanism 11 connected to the first rail having a spring motor unit 12 connected to a first lift cord pulley 20, the covering including a first lift cord collection mechanism 31 having a first roller 37 in the first rail. A covering material, e.g. a slatted blind, is connected to the first rail and moveable between an extended and a retracted position. A first lift cord 27, with a first end connected to the pulley, extends along the first roller and through the covering material. The roller rotates in either direction and has means, preferably a ball and groove ratchet type system (see Figs 4 or 7-10) to prevent rotation in one of the directions beyond a pre-selected number of revolutions. The spring motor provides a force sufficient to retract the cord when a user lifts a lower rail 5, and capable of being overcome when a user pulls on the rail 5. Further movement of the cord along the roller after rotation is prevented increases tension in the cord to aid functioning of the spring motor.
Window covering positional adjustment apparatus
The covering has a first rail 3, a positional adjustment mechanism 11 connected to the first rail having a spring motor unit 12 connected to a first lift cord pulley 20, the covering including a first lift cord collection mechanism 31 having a first roller 37 in the first rail. A covering material, e.g. a slatted blind, is connected to the first rail and moveable between an extended and a retracted position. A first lift cord 27, with a first end connected to the pulley, extends along the first roller and through the covering material. The roller rotates in either direction and has means, preferably a ball and groove ratchet type system (see Figs 4 or 7-10) to prevent rotation in one of the directions beyond a pre-selected number of revolutions. The spring motor provides a force sufficient to retract the cord when a user lifts a lower rail 5, and capable of being overcome when a user pulls on the rail 5. Further movement of the cord along the roller after rotation is prevented increases tension in the cord to aid functioning of the spring motor.
Window covering positional adjustment apparatus
TZU-YEN LIN (author)
2018-03-28
Patent
Electronic Resource
English
IPC:
E06B
Feste oder bewegliche Abschlüsse für Öffnungen in Bauwerken, Fahrzeugen, Zäunen oder ähnlichen Einfriedungen allgemein, z.B. Türen, Fenster, Läden, Tore
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FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES