Computer keyboard with electrostatic discharge feature

Details Computer keyboard with electrostatic discharge feature Computer keyboard with electrostatic discharge feature

H - Electricity

01

H

H01H 13/70 (2006.01) G06F 3/023 (2006.01) H05F 3/02 (2006.01)

Patent

CA 2140268

A computer keyboard according to a preferred construction has multiple non-conductive keys and at least one conductive key mounted in a keyboard housing. The conductive key includes a molded plastic key body having conductive material em- bedded therein. Conductive plugs are electrically coupled and mounted to the conductive key body. An electrostatic discharge pad is provided on a switch assembly positioned beneath the keys of the keyboard. The discharge pad is coupled to ground through a path resistor. When the conductive key body is depressed to an activated position, the plugs engage the electrostatic dis- charge pads so that electrostatic charges of the user progressively dissipate to ground through the key body, plug, discharge pad, and path resistor. At least one of the path resistor or the plug has a resistance greater than the resistance of the conductive key body. In this manner, electrostatic charge is routinely dissipated from a computer user while insuring that the user is not shocked when he/she initially touches and operates the conductive key.

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