| 摘要 |
<p>PURPOSE:To make the area of the extended box enough as an area for installing the extended box and a personal computer, to facilitate the fixing of a keyboard, to eliminate the trouble of operations caused by shaking or moving the keyboard, to provide a space for hand rest on the front side, and to enable inputs with a track ball by a simple operation. CONSTITUTION:On the upper face of a main body block 4, a recessed face 3 is provided to load a keyboard 1 of a personal computer A, the front edge of the keyboard 1 is supported at the main body block 4 at a rear face 6a of a front block movable by a supporting arm 7, an upper face 6b of the front block 6 is positioned near the extended face of the keyboard 1, and this upper face is provided with a track ball 5.</p> |
