| 摘要 |
A switch actuator mechanism including a slider which can execute movement in steps along a linear track, the step-wise movement being governed by the interaction of a pair of cam-followers, carried by the slider, with respective cam-surfaces disposed alongside the track, one to either side thereof. The cam-followers are resiliently urged into contact with their respective cam surfaces and permit the slider to assume, alternately, stable and unstable conditions at locations disposed in series along the track. Beyond one of the extreme positions at which the stable condition is assumed, the cam surfaces are formed with respective inwardly inclined, linear surface portions along which the respective cam-followers can run while being urged against the resilient force, thereby permitting the slider to travel beyond the extreme stable position to enable a switch means to be actuated by the slider, or some attachment thereto, the slider being restored to the aforesaid extreme stable position, after such actuation, by the resilient force applied to the cam-followers.
|
