A quick-acting mechanism Of micro switch

A quick-acting mechanism enables movable contacts to move rapidly from one fixed contact to other fixed contacts without being affected by the speed of operation as much as possible. For example, even with a knife switch, if the handle is operated quickly, the action will be faster, but the mechanism in which the speed of the handle is related to the speed of the contact movement is not called the quick type, but the slow type. The faster the switching speed of the contacts, the shorter the duration of arcing between the contacts.

In this way, the contact can be consumed, damage reduced, and stable characteristics can be maintained. But, in the switching speed, in addition to effectively reduce the amount of arc speed limit (economic speed), also have the boundaries of mechanical problems, in particular, when the closed circuit if the switch is too fast, the movable contact and the impact of the fixed contact energy becomes big and impact of jumping phenomenon (friction vibration or closed) can produce arc, at this time cause severe loss of contact, Sometimes they fail to open the circuit, causing the contacts to melt. Mechanisms performing this rapid action typically use spring mechanisms with dead points (critical points of action when jumping from one state to another).