| 摘要 |
PURPOSE: A size adjustable button and its control method are provided to easily seize the adjusted state of the button by changing the size of the button at the control of the button and differing the colors. CONSTITUTION: A size adjusting portion(106) is installed between an upper plate(102) and a lower plate(104). The size adjusting portion varies the size of a button by expanding when air is sucked and shrinking when air is discharged. Thereby, the size of the button is changed and the color is differed by differing the intake amount of air according to the rotated amount of the button. Therefore, the sensible quality is improved.
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