摘要 |
<p>The mechanism has a cam (5) with two ends (4, 14) and a track including raised and hollow parts (8, 9) arranged on respective upper and lower faces of the cam. A case (12) and a lid (13) have openings (10, 11) for passage of the cam. Two sliders (23, 23) supporting horizontal axes (21, 21) of respective rollers (20, 20), move vertically within the case. Two springs (24, 24) push the respective sliders towards the cam.</p> |