| 摘要 |
A window covering is disclosed that includes a first rail, window covering material adjacent the first rail, at least one lift cord extending through the window covering material to the headrail, a plurality of pulleys positioned adjacent the first rail, at leas t one spring motor adjacent the first rail, at least one spring motor cord extending from the one or mor e spring motors and a rigid connector attached to one or more spring motor cords and one or more lift cords The connector and one or more spring motor cords are configured to pass along at least one of the pulleys during movement along a cord path defined by one or more of the pulleys The connector should have a length that is not greater than 1/6 of the circumference of at least one of the pulleys the connector passes over during extension of the window coverin g material
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