| 摘要 |
PROBLEM TO BE SOLVED: To provide a keyboard input device, with which a waterdrop is surely prevented from dropping on an electronic component on the lower position, by making the device waterproof between a circuit substrate and a metal plate at the bottom, even if an operator spills waterdrop or the like from above a key top by mistake. SOLUTION: The keyboard input device is provided with the circuit substrate 7, on which fixed contacts 7a being a plurality of contact parts are formed, a rubber spring 8 that is disposed on the contact parts 7a and has the hollow- like inside, the key top 1 for which a force can be exerted by an elastic force of the rubber spring 8 in a direction away from the circuit substrate, and a base plate 10 disposed at the bottom of the circuit substrate 7. The rubber spring 8 is bonded to the circuit substrate 7, in a state in which the contact part 7a is positioned inside the hollow; a first air vent is formed, passing through the circuit substrate 7 inside the hollow; and opposed faces of the circuit substrate 7 and the base plate 10 are bonded by an adhesive agent 9. COPYRIGHT: (C)2003,JPO
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