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    • 4. 发明申请
    • ACTUATOR FOR WINDOW BLINDS
    • WO2021116375A1
    • 2021-06-17
    • PCT/EP2020/085705
    • 2020-12-11
    • ROTALINK LIMITED
    • ZEINEDDINE, Firas
    • E06B9/72E06B9/322
    • In general terms, the invention provides an actuator for driving a rotatable element of a window blind mechanism, the actuator comprising a motor that drives, via a compound planetary gearbox, a coupling for engaging the rotatable element. A sun gear of the compound planetary gearbox is coupled to the motor, and the coupling is coupled to an output ring gear of the compound planetary gearbox. In a first aspect the compound planetary gearbox comprises first and second stages. The first stage comprises an input sun gear, a first plurality of planet gears in meshed engagement with the input sun gear, and a fixed ring gear in meshed engagement with the first plurality of planet gears. The motor is connected to the input sun gear to thereby be capable of directly driving the input sun gear. The second stage comprises a second plurality of planet gears, and an output ring gear in meshed engagement with the second plurality of planet gears. Each of the second plurality of planet gears is rotatable in tandem with a respective one of the first plurality of planet gears. The actuator further comprises a coupling rotatable in tandem with the output ring gear, the coupling being configured to be coupled with a rotatable element of a window blind to thereby drive the rotatable element.