| 摘要 |
A push-button for inputting a number which a user accurately inputs with the tactility of button is provided to allow a user to operate a button accurately and conveniently by discriminating the position of the button with tactility of the button by forming the number of the respective projections on three cross direction line buttons to be distinguished to one to three. On a button(12) of a first cross direction line, one projection(11) is formed on the surface. On a button(13) of a second cross direction line, two projections are formed. On a button(14) of a third cross direction line, three projections are formed. The number of projections is formed on each of three cross direction line buttons to be distinguished to one to three.
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