| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a mouse with which maintenance work with the exchange of a ball can be easily performed and further operation manipulation can be efficiently performed. SOLUTION: This mouse is provided with an almost cocoon-shaped casing 1 consisting of the lower half part of the mouse and opening its upper surface, spherical ball 6 provided inside the fore side of the casing so as to be freely rotated at 360 deg. while protruding its terminal part 6a from a circular opening part 1b, and transparent cover 7 freely attachably and detachably provided above the ball 6 so as to close the fore opening part of the casing 1 and formed from transparent resins, and an operator visually confirms the ball 6 through the transparent cover 7.</p> |
