| 摘要 |
<p>The mechanism has a connecting unit that includes a coupling (22a) engaged in an opening (25) of a movable groove (24). A breaking unit (37) carried by a tilted slope (30) presents a thrust and a slope longitudinally in the same direction as face of couplings (26, 27) of the groove. The groove controls a part of actuation and stopping of the connecting unit towards the breaking unit slope. The part of actuation and stopping of the connecting unit meets and slides on the slope of the breaking unit (37) and crosses it to settle at the side of the thrust in a position of stopping to prevent the mobile carriage from moving in the other direction. The part of coupling (22a) slides on the slope of the groove to emerge the part of actuation and stopping from the thrust.</p> |
