| 摘要 |
<p>PURPOSE:To facilitate controlling a cursor in shape with a simple constitution, by attaining an electric output signal for changing the movement and the shape of a cursor by the operation of a key switch having a single key top. CONSTITUTION:In case that a cursor K on a display part 2 is moved up and left, the cursor K is moved if the position of a point A on a key top 6 is depressed from the direction vertical to the key top surface. In case that the display size of the cursor K is changed, the display size is increased by sliding the key top 6 in the direction of an arrow B, and it is reduced by sliding the key top 6 in the direction of an arrow C. In this case, a ball-shaped operation conductive ball and a flat spring contact are provided under the key top 6, and the flat spring contact is brought into contact with the ball by the depression of the key top. This information is converted to an electric signal and is sensed by a CPU to control the movement direction of the cursor K.</p> |
