| 摘要 |
<p>A first and a second moving member (7, 8) are provided with respective permanent magnets (9, 10) having a mutually opposing polarity so as to exert a mutually repulsing force that keeps said moving members (7, 8) in their resting position. The magnets (9, 10) are adapted to get linked with the magnetic field generated by a solenoid (4) when the latter is supplied with a unidirectional voltage having a first and a second polarity. The corresponding magnetic field generated in this manner exerts a pushing force (A; B) capable of overcoming said mutually repulsing force and selectively switching said first or said second moving member (7, 8) into a working position. <IMAGE></p> |
