| 摘要 |
<p>The mechanism (1) has a frame comprising a jaw (5) secured to a stem (7) that moves in translation against a compression spring. A buttressing bistable blocking unit (4), secured to the jaw, has a connecting rod (9) to connect an end of the stem with the frame by articulations (10-12). The articulations are arranged, so that one of the articulations is moved relative to an alignment plane containing axles of second and third articulations. The former articulation is in stable position on sides of the plane. Action of the spring allows axle of the second articulation in unstable position.</p> |
