| 摘要 |
<p>PURPOSE:To perform positioning substantially more easily than moving the main body case of a mouse device slightly by rotating a mouse ball slightly with the operation of a finger or the like from an upper opening hole in the case of accurately and minutely positioning the mouse device at a positron on the screen of a display device. CONSTITUTION:The upper opening hole 6 is provided on the position opposed to a mouse ball 2 on the upper surface of the main body case 1 and the mouse ball 2 can be rotated by finger operations from the upper opening hole 6.</p> |
