| 摘要 |
A support plate having a top end edge defining a central convex portion which is the highest in the center thereof is vertically secured in the case to the bottom panel of the case, and a movable contact blade is supported on the top end edge of the support plate for rotating movement. Attached to the movable contact blade at one end thereof are two movable contacts spaced apart in the direction of the pivot axis of the blade. Two fixed contact blades are disposed on the bottom panel and each has a fixed contact attached thereto in opposition to a corresponding one of the movable contacts with the end portion of each fixed contact blade extending out through the bottom panel to define a terminal. Two serial switches are constituted by means of the movable contact blade between the two terminals, rotation of a rotatable actuator causes two sliding protrusions of a driving piece to slide across the upper surface of the movable contact blade, whereby the two serially connected switches are simultaneously turned on and off.
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