| 摘要 |
An actuator device (1) for actuating a control mechanism by axially moving an actuating member (2) against a force comprises a housing (3) in which a reversible driving means (4) is arranged with a first rotatable part (5) and a second rotatable part (6) engagable with one another and acting on said actuating member (2) for axially moving it in feed direction (7) to said control mechanism upon rotation in one direction. An electric motor (8) rotates said first rotatable part (5) and said second rotatable part (6) by engagement with said first rotatable part. Rotation preventing means (9) prevent a rotation of at least one of said rotatable parts (6) in a second direction. Releasing means (10) release said rotation preventing means (9) to permit rotation of said at least one rotatable part (6) to permit said actuating member te be axially moved in a direction (11) opposite to said feed direction (7). <IMAGE> |
