| 摘要 |
PROBLEM TO BE SOLVED: To provide a dustproof switching device, increased in dustproof efficiency for preventing dust from infiltrating into a case and capable of easily realizing the reduction in external size of the case. SOLUTION: In this dustproof switch device, a movable-board boss 4a projecting from one surface of a movable board 4 is fitted loosely into a substantially V-shaped cutout part 5c provided on the upper side of a substantially fan-shaped dustproof sheet 5 turnably journalled to a shaft part 2b projectingly provided on an inner surface of a case 2. When the movable board 4 moves horizontally together with the movable-board boss 4a, the dustproof sheet 5 is allowed to make a prescribed amount of turning motion in the same direction by means of the movable-board boss 4a.
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