| 摘要 |
<p>PROBLEM TO BE SOLVED: To stably hold and operate a coordinate input means and to prevent misoperation by operating the coordinate input means from different directions. SOLUTION: Parts of a track ball 103 are exposed in the top and reverse surfaces of a portable terminal main body 101, and a cursor is moved by pressing the track ball 103 with the thumb of the right hand from above and supporting the track ball 103 with the middle finger of the right hand from below. Further, a selection button 104 is operated with the index finger of the right hand. At this time, a rotary encoder for detecting rotation is connected to a rotation detection part, the direction and quantity of rotation of the track ball 103 are detected from the output of the rotary encoder, and according to the detection results, the portable terminal main body 101 controls the movement of the cursor. In this case, the portable terminal main body 101 is equipped with rotation detection parts, which detect lateral and longitudinal rotation directions and quantities on horizontal surfaces to control the cursor movement of a display part 102.</p> |
