Patent ID: 8710383

Claim:
A press key using thin film switch, which comprises: a thin film switch, disposed at a side of the substrate, and further comprising: a first thin film, having a first conductor unit that is composed of a plurality of first electric conductors and is mounted on a surface of the first thin film; and; a second thin film, disposed corresponding to the surface of the first thin film where the plurality of first electric conductors is mounted while allowing the second thin film to be spaced from the first thin film by a first interval, and the second thin film further having a second conductor unit, composed of at least one second electric conductor, that is mounted on a surface of the second thin film which is orientated facing toward the first thin film and at a position corresponding to the first conductor unit while allowing the first conductor unit to be spaced from the second conductor unit by a second interval; a substrate, disposed on a surface of the thin film switch; a keycap, disposed on the substrate; an elastic component, disposed at a position between the keycap and the substrate, further having a first protrusion to be formed at a position corresponding to one of the plural first electric conductors; and a supporting element, disposed at a position between the keycap and the substrate while movably connecting to the keycap and the substrate for enabling the keycap to move up and down relative to the substrate, and the supporting element further being configured with a second protrusion and a third protrusion at positions respectively corresponding to another two first electric conductors of the plural first electric conductors that are different from the one corresponding to the first protrusion; wherein, at least one protrusion selected from the first, the second and the third protrusions is driven to move and engage with the thin film switch when the keycap is subjected to a load, and correspondingly, enabling at least one of the first electric conductors to engage with the at least one second electric conductor so as to construct an electrical conduction.