| 摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to operate a mouse on a plane or being held by hand in accordance with a user's request and condition. SOLUTION: In the case of executing operation with the upper surface of the mouse, a rotary cover 2 is rotationally moved to the lower surface of the mouse and a control ball is exposed to the surface of a mouse body 1. At the time, the control ball is pushed up by a ball pressed into the cover 2. In the case of using the control ball in a state depressed to a plane, the cover is rotationally moved to the upper surface of the mouse to cover the upper surface and allow the execution of operation.</p> |
