Patent ID: 7417200

Claim:
A key structure, comprising: a key cap; a substrate; a first rod, having a first end movably connected to the substrate and a second end connected to the key cap; a second rod connected to the first rod, having a third end connected to the substrate and a fourth end connected to the key cap; and a resilient unit movable between a first position and a second position; wherein when the resilient unit is in the first position, the resilient unit substantially abuts the first rod to hold the key cap at a first height with respect to the substrate, such that the key structure is in a normal state, and when the resilient unit is in the second position, the first rod is released from the resilient unit, and the key cap descends to a second height lower than the first height by gravity or an external force, such that the key structure is in a depressed state; and wherein the resilient unit comprises a resilient element and a slider movable between the first and second positions, the resilient element comprising a connection member movably connecting to the first rod and a resilient member connecting the slider and the connection member.