| 摘要 |
A snap action switch having an over-centering mechanism and a housing for enclosing the mechanism, the mechanism including an actuating button, a first and a second fixed terminal bearing a first and a second contact, respectively, both the first and second terminals being secured to end wall of the housing, a stationary terminal secured to the housing in spaced apart relation to the end wall, a switch blade carrying a movable contact, the blade pivotally connected at one end to the stationary terminal, an actuator lever having a first end adapted to engage said actuating button and a second end pivotally supported by the end wall of the housing, and a coil spring connected to one end to the blade and at an other end to the first end of actuator lever, characterized in that the actuator lever has a medial portion which is disposed on an opposite side of the first fixed contact with respect to the second fixed contact, and is pivotally supported at the second end thereof by an inner portion of the end wall between the first and second fixed terminals.
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