| 摘要 |
PURPOSE:To enable even a visually handicapped person to securely make various settings to be desired without any error by employing plural kinds of shapes for plural operation elements to be operated selectively. CONSTITUTION:Groups of three push buttons 2a - 2c, and 2d and 2f for decreasing or increasing respective digits are made different in contour shape. Namely, the push buttons 2a and 2f for varying a number of 100 figures are in a circular contour shape, the push buttons 2b and 2e for varying a number of 10 figures are in triangular contour shape, and the push buttons 2c and 2d for varying a number of unit figures are in a rectangular contour shape. Thus, they are arranged closed one another and the operation elements to be operated selectively for a certain kind of settings are constituted in plural kinds of shapes. Consequently, even the visually handicapped person can easily and securely discriminate operation elements by seeing or touching. |
