| 摘要 |
<p>PURPOSE:To reduce the size without making a case for storing a movable member unnecessarily large. CONSTITUTION:The endless rotary member 11 is put in the case 1, a stick 6 is fixed on its top surface, and the ball at the bottom part of a fixed mouse 2 abuts on this top surface. The endless rotary member 11 is sectioned in a tubular flat shape, so the stick 6 can be moved not only in an (x) direction, but also in a (y) and an (xy) direction. The case 1 may, therefore, be sized large enough merely to store the endless rotary member 11.</p> |
