EARTHING STRUCTURE OF OPERATION PANEL PART OF EQUIPMENT

PROBLEM TO BE SOLVED: To realize an earthing structure of an operation panel part of equipment used for earthing the operation panel to prevent static electricity applied to an operation knob from flowing into an internal control board and for directing, to the front side, much of light of a light source entered into a cylindrical light emission member from the side thereof. SOLUTION: An annular earthing member 16 is mounted on the back side of the cylindrical light emission member 14 disposed in the outer periphery of the operation knob 10B. The annular earthing member 16 includes: a circular annular plate 161 disposed on the back side of the cylindrical light emission member 14 for reflecting light of an operation displaying light source 15S advancing toward the rear side of the cylindrical light emission member 14 toward the front side; a circular pipe part 162 formed continuously to the annular plate 161, disposed in a knob insertion hole 142a of the cylindrical light emission member 14 and having such a size as to contact to or come close to the circumferential surface of a cylindrical small-diameter part 101 of the operation knob 10B; and arm parts 163 formed extendedly from the annular plate 161 and brought into contact with a metallic operation panel plate 8R on the front surface. COPYRIGHT: (C)2006,JPO&NCIPI