| 摘要 |
A drive device for a control member which is driven by a motor in two directions has a freewheel clutch which is in the form of a wrap spring wound around a shaft. An end region of the wrap spring has at least one winding whose diameter is larger than the diameter of the shaft which is disposed in an end region of the wrap spring, so that the wrap spring does not bear against the shaft in the end region. The wrap spring effectively suppresses noise generation which would occur upon loading or blocking of the drive device, in particular in a transmission, due to oscillation of the motor.
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