| 摘要 |
<p>An actuation device comprises a driving member (30), a driven member (40) and actuating means (20) operable for producing a movement of the driving member (30). The driven member (40) has a seat (44) into which is operatively inserted, with the possibility of relative movement, an engagement part (35) of the driving member (30). The driving member has a seat (34) which, in at least one position of the actuation device (17), at least partially faces the seat (44) of the driven member (40). The two seats (44, 34) are longitudinally extended and the actuation device (17) further comprises at least one floating body (50), capable of moving between the two seats (34, 44) when they face each other at least in part. According to the invention the actuation device further comprises constraint means (34m, 34m', 34m", 34p, 45a, 45b) configured for preventing accidental or irregular displacements of the floating body (50), particularly accidental or irregular displacements due to knocks, vibrations and similar mechanical stresses.</p> |
