| 摘要 |
<p>The operating mechanism has one arm (7) of an angled lever (7, 8) pivoted to the door (5) of the cabinet about an axis (13) parallel to the axis (2) of pivot of the cover (3, 4). This arm passes at its free end (9) through a hole (10) in the cabinet's door from where it can be operated by hand. The relative angle of pivot of the lever's two arms is limited by end-stops (15, 16). The second arm (8) of the lever has a guide slot (18) with input and output holes (19, 20) along which a pin (21) fixed to the cover travels when the door is opened and closed, i.e when the switch is switched on and off.</p> |
