| 摘要 |
<p>An electromagnetically controlled spring clutch mechanism comprising an output element (6), an input rotating element (16), a first boss member (32) rotating as a unit with the input rotating element (16), a second boss member rotating as a unit with the output rotating element (6), a coil spring means (44) fitted over and across the first and second boss members (32,26), a rotation control member (46) for hampering the contraction of the coil spring means (44), a movably mounted armature (18), a biasing means (68) for biasing the armature (18) towards the rotation control member (46), and an electromagnetic means (20) for magnetically attracting the armature (18). When the electromagnetic means (20) is de-energized, the armature (18) acts on the rotation control member (46) by the action of the biasing means (68) whereby the contraction of the coil spring means (44) is hampered. When the electromagnetic means (20) is energized, the armature (18) is moved away from the rotation control member (46) by the magnetic attracting force of the electromagnetic means (20) whereby the coil spring means (44) is contracted</p> |
