Patent ID: 8071897
Filing Date: 2011-12-06
Classification: H01H

Abstract:
1. A key structure, comprising: a resilient member comprising a cover board, a connecting wall and a peripheral rim, all of which being none-electrically-conducting, the connecting wall connecting the cover board to the peripheral rim, the connecting wall and the peripheral rim enclosing a chamber, the bottom of the chamber having a plurality of conducting films electrically formed thereon, the plurality of conducting films forming a plurality of first connecting points and a second connecting point electronically connecting with the first connecting points; an electrically conducting dome member forming an arch portion and a peripheral portion around the arch portion; a circuit board forming a plurality of first terminals corresponding to the first connecting points, second terminals corresponding to the peripheral portion of the dome member and a third terminal corresponding to the arch portion; wherein the dome member is mounted to the circuit board, the peripheral portion electronically connects with the second terminals, the resilient member covers the circuit board to receive the dome member therein, the first connecting points electrically contact the first terminals, the second connecting point align with the arch portion of the dome member, when the resilient member is pressed towards the circuit board, the resilient member is partially deformed with the elastic deformation of the connecting wall, enabling the second connecting point to resist against the arch portion, wherein the first terminals and the second terminals are both electrically connected, further the first terminals, the second terminals and the third terminal are all electrically connected.