| 摘要 |
An actuator for transducing a rotational movement into a linear movement, which comprises: a drive motor generating the rotational movement; a first input gear connected to an output shaft of the drive motor; a first output gear engaging with the first input gear at a first gear ratio and having an external thread portion; a second output gear engaging with a second input gear at a second gear ratio and having an inner thread portion meshing with the external thread portion; an output member connected to the second output gear and generating the linear movenment; and the first and second gear ratios being different from each other.
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