| 摘要 |
<p>PURPOSE:To improve operability by protruding a track ball onto the body case when the track ball is used and to improve the efficiency of document input editing and graphic input editing by housing the track ball inside the body case when the track ball is not used. CONSTITUTION:Concerning this keyboard or information processor, a track ball 1 is provided so as to freely appear/disappear on the upper face of a keyboard 1. When the track ball is used, it is projected on the surface of the keyboard 1 but when the track ball is not used, it can be housed inside the body.</p> |
