| 摘要 |
A keyboard input device of the present invention comprises a circuit substrate having a plurality of fixed contacts formed thereon, a rubber spring with a hollow therein provided on the contacts, a key top that can be urged by elastic-urging force of the rubber spring in a direction away from the circuit substrate, and a base plate provided under the circuit substrate. The rubber spring is bonded to the circuit substrate and the contacts are positioned in the hollow, a first ventilating hole penetrating the circuit substrate is provided so that the first ventilating hole is positioned in the hollow, and opposing surfaces of the circuit substrate and the base plate are bonded to each other by an adhesive.
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