MOTORIZED WINDOW TREATMENT

摘要

A motorized window treatment may provide a low-cost solution for controlling the amount of daylight entering a space through a window. The window treatment may include a covering material (e.g., a cellular shade fabric or a roller shade fabric), a drive assembly for raising and lowering the covering material, and a motor drive unit including a motor configured to drive the drive assembly to raise and lower the covering material. The motorized window treatment may comprise one or more battery packs configured to receive batteries for powering the motor drive unit. The batteries may be located out of view of a user of the motorized window treatment (e.g., in a headrail or in a battery compartment). The motorized window treatment may use various power-saving methods to lengthen the lifetime of the batteries, e.g., to reduce the motor speed to conserve additional battery power and extend the lifetime of the batteries.

主权项

1. A motorized window treatment comprising:
a headrail having first and second opposite ends; a covering material having a top end connected to the headrail, the covering material extending from the headrail to a bottom end; a motor drive unit including a motor and located in the center of the headrail; first and second drive shafts extending from both sides of the motor drive unit and rotatably coupled to the motor drive unit thereby allowing rotations of the motor to result in rotations of the drive shafts; first and second lift cords, the first lift cord located proximate to the first opposite end of the headrail and the second lift cord located proximate to the second opposite end of the headrail, each lift cord rotatably received around a respective one of the drive shafts and extending vertically to the bottom end of the covering material; and first and second battery packs configured to hold respective first and second batteries for powering the motor drive unit, the first and second battery packs located on each side of the motor drive unit, the first battery pack located between the first opposite end of the headrail and the first lift cord, and the second battery pack located between the second opposite end of the headrail and the second lift cord; wherein the motor drive unit is configured to rotate the drive shaft to adjust the bottom end of the covering material between a fully-closed position and a fully-open position in response to rotations of the drive shaft.