Data input device with a manually operable key having static electricity releasing function
AssigneeFujitsu Limited
InventorsMichihiro Aoyama, Yasuo Yatsuda
Life of this patent
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Abstract
A data input device, such as a keyboard, comprising at least one key having a static electricity releasing circuit incorporated therein. The key comprises a manually operable keytop for pushing the membrane switch and is made from an electrically conductive plastic. At least one coil spring is provided between the keytop and the support panel or the other conductive layer that is connected to a ground. Thus a static electricity releasing circuit is formed from the keytop to the ground via the coil spring so as to instantaneously and reliably release static electricity that has accumulated on an operator to a ground.
Claims23
A data input device comprising a support panel and at least one key mounted on the support panel, said key comprising:
- a switch element arranged on the support panel;
- a manually operable keytop for turning the switch element on and off;
- and
- at least one coil spring biasing the keytop away from the support panel;
- wherein at least a part of the keytop is made from an electrically conductive material, and the coil spring has one end brought into contact with at least a part of the keytop and the other end being connected to a ground.
A data input device comprising a support panel and at least one key mounted on the support panel, said key comprising;
- a switch element arranged on the support panel;
- a manually operable keytop for turning the switch element on and off;
- and
- at least one coil spring biasing the keytop away from the support panel;
- wherein at least a part of the keytop is made from an electrically conductive plastic comprising a resin material and minute electrically conductive particles mixed in the resin material, and the coil spring has one end brought into contact with at least a part of the keytop and the other end being connected to a ground.
Dependencies are inferred from the claim text.