| 摘要 |
PROBLEM TO BE SOLVED: To provide a keyboard in allowing firm fixing of a rubber cup thereon and simplification of constituent parts. SOLUTION: This keyboard is equipped with an upper membrane sheet 15 and a lower membrane sheet having electrical contact points 13, 16 facing each other with a gap, a rubber cup 17 provided so as to cove the electrical contact point 16, a key top 21 provided on the upper portion of the rubber cup 17, and a link 22 for vertically movably supporting the key top 21. When the key top 21 is pressed down, the rubber cup 17 is elastically deformed, and the electrical contact points 13, 16 facing each other with the gap is brought into contact with each other. A flange portion 17a is integrally formed at the outer peripheral edge of the lower portion of the rubber cup 17, and an embossed sheet 18 is provided on the upper face of the upper membrane sheet 15 for fixing the flange portion 17a of the rubber cup 17 by pinching the flange portion 17a between the upper membrane sheet 15 and the embossed sheet 18.
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