| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pointing device which is capable of surely preventing a foreign substance from entering the inside and preventing a foreign substance from being mixed, without being enlarged. <P>SOLUTION: Between a ring key 10 and a center key 11, elastically deformable dust-proof ribs 21 is provided which is disposed to cross a gap 20 and formed with a dimension larger than the gap 20 in the case where the center key 11 is at a reference position. <P>COPYRIGHT: (C)2012,JPO&INPIT |
