| 摘要 |
PROBLEM TO BE SOLVED: To prevent a part overlapping a cut of a circuit board around a screw through-hole of a protection cover from being deformed by the pressure from the screw head of a fixing screw when the protection cover and the circuit board are fixed on an accessory base with screws. SOLUTION: An operator who assembles a bottom left peripheral accessory unit 20 inserts a male screw part 302 of a fixing screw 27d into a screw through-hole 57d of a protection cover 25, next inserts the male screw part into a cut 65d of an illumination board 26, then screws the male screw part into a female screw part of a frame member 21, tightens the fixing screw 27d, and fixes the protection cover 25, the illumination board 26, and the frame member 21 under the assembled condition. A protruding part 74 inserted into the cut 65d of the illumination board 26 to bring the end into contact with the neighborhood of the female screw part of the frame member 21 is formed to project from the neighborhood of the screw through-hole 57d of the protection cover 25. COPYRIGHT: (C)2011,JPO&INPIT
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