| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a membrane keyboard of a membrane sheet structure made of one sheet with which an electrode arranged on the membrane sheet is not distorted. Ž<P>SOLUTION: The membrane sheet 25 is arranged on a reinforcing plate 26 and is composed of an upper sheet 27 and a lower sheet 28. The upper sheet 27 and the lower sheet 28 are connected by a connection portion 29. The connection portion 29 has a narrower width than that of the upper sheet 27 and the lower sheet 28 and can be displaced against the upper sheet 27 and the lower sheet 28 when it is bent. In a position where the reinforcing plate 26 faces the connection portion 29, there is formed an escape hole 34 into which a bent portion of the connection portion 29 enters. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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