| 摘要 |
The push-button switch has a base plate, a circuit membrane, a key cap, a scissors-type linkage and a resilient element. The scissors-type linkage haying a first linking bracket and a second linking bracket is disposed between the circuit membrane and the key cap and movable along a specified path. The resilient element is mounted on the scissors-type linkage so as to move the key cap and the scissors-type linkage back to the initial state as the force applied on the key cap is released. The scissors-type linkage is provided with a guiding portion thereon, and the resilient element has a trigger, which is actuated by the guiding portion and used to trigger the switch as the key cap is fully pressed. The resilient element also can be a V-shaped reed connected to the first linking bracket and the second linking bracket, or the resilient element can be a spring connected to the first linking bracket and the second linking bracket.
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