| 摘要 |
<p>PURPOSE: To prevent a careless input operation, and also give a click feeling at the time of the operation of an optical touch switch. CONSTITUTION: By plural luminous elements 7 provided in the periphery of a display surface 2a, a movable transparent plate 3, covering the display surface 2a, is arranged between plural light beams L, being crossed in an YX direction along the display surface 2a, and the display surface 2a. Position switches 4 and 4 are provided on the four corners on the back surface side of the transparent plate 3. The transparent plate 3 is supported movably to an unoperating position, receding from the display surface 2a, and an operating position, nearing to the display surface 2a, and is energized constantly to the unoperating position, by the movable pieces 4a and 4a of position switches 4 and 4 and springs 5 and 5. When the transparent plate 3 is not moved to the operating position, and the position switches 4 and 4 are not operated; the output of a switch signal, in accordance with the operating place of the display surface 2a, is inhibited even when the light beams L are hindered.</p> |
