| 摘要 |
<p>A vacuum switch is provided with a drive lever (9) which may pivoted for switching on and switching off a vacuum switch tube. Between the drive lever (9) and the movable contact bolt (7) of the switch tube (1) there are provided a spherical bowl (13) and an adapted spherical hinged cavity (14), as well as a force transmission part (15). If the unit switch-on position is considered wherein the medial line (22) of the drive lever (9) is at right angle with respect to the longitudinal axis (23) of the movable contact bolt (7), the bowl central point (24) of the hinge device is shifted with respect to the medial line (22) of the drive lever (9) in the direction of the switch tube in a proportion corresponding to approximately half of the stroke of the movable contact bolt (7) during switch on and switch off. Thereby, the lateral displacement, more precisely the lateral forces exerted on the movable contact bolt (7) upon switching on and switching off are decreased down to a negligible value.</p> |
