| 摘要 |
PURPOSE: To easily and surely remove dust stuck to the surface of a dustproof glass by the user himself or herself by providing an opening part for cleaning or replacing a dustproof glass member in the device case. CONSTITUTION: The opening part 14 is provided in the bottom surface of the device case 20, and is usually closed by a lid. At the time of cleaning the dustproof glass members 12 and 13, the lid is opened, so that the members 12 and 13 are exposed to the outside via the opening part 14. Then, cleaning pins 18 are inserted into positioning holes provided around the opening part 14 of the case 20 so as to be positioned, and then a cleaning member is inserted through the opening part 14. A tip part of the cleaning member is equipped with a cylinder-shaped brush 16 to be rotatable in the state of its circumferential surface brought in contact with the glass members 12 and 13, and by turning a knob 17, the dust stuck to the glass members 12 and 13 is removed. |
