| 摘要 |
A snap action pulse-producing electrical switch comprises a carrier means operatively connected to a support and movable relative to the support from first position to second position upon the application of an actuating force thereto, a first electrical contact operatively connected to the carrier means and movable therewith, a second electrical contact positioned to receive the first contact in an electrical connection, and snap means operatively connected to the first contact and effective to snap the first contact into engagement with the second contact when the first contact is moved past a predetermined position between its nonactuated first position and the engagement with the second contact. The snap means are also effective to quickly disengage the contacts after the engagement occurs, and to urge the first contact and the carrier to their respective first positions. In the preferred embodiment the snap means comprises a flexible member which is normally flexed in a first condition, and which snaps to a second flexed condition when the contact passes a predetermined position in its travel. A resilient member provides additional force generation during the snap-over action of the flexible member. The resilient member is in operative contact with a stationary member and moves in the direction of travel of the first contact. The resilient member is also flexed from one condition to another simultaneously with the flexible member, thereby to provide additional snap driving means.
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