| 摘要 |
The present invention provides an improved compact actuator ( 20 ) for selectively moving an object ( 27 ) relative to a support ( 21 ). The improved actuator includes a gear reduction unit ( 24 ) mounted on the support. The gear reduction unit has a ring gear ( 25 ) adapted to be rotated about a longitudinal axis (x-x), and a pinion ( 26 ) mounted on the ring gear. All bearings for the output member are physically located within the gear reduction unit. The output member is coupled to the object such that rotation of the output member will move the object relative to the support.
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