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US 2017/0362887 A1Published application
Slat control mechanism for blinds
AssigneeWhole Space Industries LTD
InventorTzu-Yen Lin
Life of this patent
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Abstract
A window covering includes a first cord extending along a drive pulley of a first ladder control mechanism such that motion of the lift cord along the drive pulley during retraction of slats towards a first rail drives rotation of the drive pulley in a first rotational direction to rotate a ladder pulley for tilting of the slats from an open position to a closed position and motion of the lift cord along the drive pulley during extension of the slats drives rotation of the drive pulley in a second rotational direction to rotate the ladder pulley for tilting of the slats from the closed position to the open position. The ladder may be composed of cord or tape. Each ladder may include a front rail, a rear rail, and rungs that extend between the front and rear rails for supporting the slats.
Claims20
A window covering comprising:
- a first rail;
- a spring motor unit positioned in the first rail;
- a first lift cord connected to the spring motor unit;
- a first ladder control mechanism having a friction pulley, a drive pulley, and a ladder pulley, the drive pulley connected to the ladder pulley such that rotation of the drive pulley in a first rotational direction drives rotation of the ladder pulley and rotation of the drive pulley in a second rotational direction also drives rotation of the ladder pulley, the first rotational direction being opposite the second rotational direction, the first lift cord being routed to pass between the drive pulley and the friction pulley such that the first lift cord passes along the friction pulley and the drive pulley without being entrained by the ladder pulley;
- a first ladder supporting a plurality of slats, the first ladder connected to the ladder pulley of the first ladder control mechanism;
- the plurality of slats being moveable relative to the first rail, the slats moveable between an extended position and a retracted position;
- and
- the first lift cord extending along the drive pulley of the first ladder control mechanism such that motion of the first lift cord along the drive pulley during one of retraction and extension of the slats drives rotation of the drive pulley in the first rotational direction to rotate the ladder pulley for tilting of the slats from an open position to a closed position and motion of the lift cord along the drive pulley during the other of retraction and extension of the slats drives rotation of the drive pulley in the second rotational direction to rotate the ladder pulley for tilting of the slats from the closed position to the open position.
5 more elements
A venetian blind comprising:
- a first rail;
- a plurality of slats, the slats moveable relative to the first rail between an extended position and a retracted position;
- a spring motor unit positioned in the first rail;
- a first lift cord connected to the spring motor unit;
- a first ladder control mechanism having a first friction pulley, a first drive pulley, and a first ladder pulley, the first drive pulley connected to the first ladder pulley such that rotation of the first drive pulley in a first rotational direction drives rotation of the first ladder pulley and rotation of the first drive pulley in a second rotational direction drives rotation of the first ladder pulley, the first rotational direction being opposite the second rotational direction, the first lift cord being routed to pass between the first drive pulley and the first friction pulley such that the first lift cord passes along the first friction pulley and the first drive pulley without being entrained by the first ladder pulley;
- a first ladder supporting the slats, the first ladder connected to the first ladder pulley of the first ladder control mechanism;
- a second lift cord connected to the spring motor unit;
- a second ladder control mechanism having a second friction pulley, a second drive pulley, and a second ladder pulley, the second drive pulley connected to the second ladder pulley such that rotation of the second drive pulley in the first rotational direction drives rotation of the second ladder pulley and rotation of the second drive pulley in the second rotational direction drives rotation of the second ladder pulley, the second lift cord being routed to pass between the second drive pulley and the second friction pulley such that the second lift cord passes along the second friction pulley and the second drive pulley without being entrained by the second ladder pulley;
- a second ladder supporting the slats, the second ladder connected to the second ladder pulley of the second ladder control mechanism;
- the first lift cord extending along the first drive pulley of the first ladder control mechanism such that motion of the first lift cord along the first drive pulley during retraction of the slats drives rotation of the first drive pulley in the first rotational direction to rotate the first ladder pulley for tilting of the slats from an open position to a closed position and motion of the first lift cord along the first drive pulley during extension of the slats drives rotation of the first drive pulley in the second rotational direction to rotate the first ladder pulley for tilting of the slats from the closed position to the open position;
- and
- the second lift cord extending along the second drive pulley of the second ladder control mechanism such that motion of the second lift cord along the second drive pulley during retraction of the slats drives rotation of the second drive pulley in the second rotational direction to rotate the second ladder pulley for tilting of the slats from an open position to a closed position and motion of the second lift cord along the second drive pulley during extension of the slats drives rotation of the second drive pulley in the first rotational direction to rotate the second ladder pulley for tilting of the slats from the closed position to the open position.
9 more elements
A venetian blind comprising:
- a first rail;
- a plurality of slats, the slats moveable relative to the first rail between an extended position and a retracted position;
- a spring motor unit positioned in the first rail;
- a first lift cord connected to the spring motor unit;
- a first ladder control mechanism having a first friction pulley, a first drive pulley and a first ladder pulley, the first drive pulley connected to the first ladder pulley such that rotation of the first drive pulley in a first rotational direction drives rotation of the first ladder pulley and rotation of the first drive pulley in a second rotational direction drives rotation of the first ladder pulley, the first rotational direction being opposite the second rotational direction, the first lift cord being routed to pass between the first drive pulley and the first friction pulley such that the first lift cord passes along the first friction pulley and the first drive pulley without being entrained by the first ladder pulley;
- a first ladder supporting the slats, the first ladder connected to the first ladder pulley of the first ladder control mechanism;
- a second lift cord connected to the spring motor unit;
- a second ladder control mechanism having a second friction pulley, a second drive pulley, and a second ladder pulley, the second drive pulley connected to the second ladder pulley such that rotation of the second drive pulley in the first rotational direction drives rotation of the second ladder pulley and rotation of the second drive pulley in the second rotational direction drives rotation of the second ladder pulley, the second lift cord being routed to pass between the second drive pulley and the second friction pulley such that the second lift cord passes along the second friction pulley and the second drive pulley without being entrained by the second ladder pulley;
- a second ladder supporting the slats, the second ladder connected to the second ladder pulley of the second ladder control mechanism;
- the first lift cord extending along the first drive pulley of the first ladder control mechanism such that motion of the first lift cord along the first drive pulley during extension of the slats drives rotation of the first drive pulley in the first rotational direction to rotate the first ladder pulley for tilting of the slats from an open position to a closed position and motion of the first lift cord along the first drive pulley during retraction of the slats drives rotation of the first drive pulley in the second rotational direction to rotate the first ladder pulley for tilting of the slats from the closed position to the open position;
- and
- the second lift cord extending along the second drive pulley of the second ladder control mechanism such that motion of the second lift cord along the second drive pulley during extension of the slats drives rotation of the second drive pulley in the second rotational direction to rotate the second ladder pulley for tilting of the slats from an open position to a closed position and motion of the second lift cord along the second drive pulley during retraction of the slats drives rotation of the second drive pulley in the first rotational direction to rotate the second ladder pulley for tilting of the slats from the closed position to the open position.
9 more elements
Dependencies are inferred from the claim text.