| 摘要 |
PROBLEM TO BE SOLVED: To attain dust-proof effect between a housing and a cover with no fitting gap by providing a circumferential wall of window part in the housing to provide a gap with respect to the side face at the display element part of an electric circuit system and then sealing the gap hermetically with an elastic soft sheet provided on a display element. SOLUTION: When an electric circuit system is assembled into a housing 1, a gap 7 is provided between a circumferential wall 1a at window part provided on the inner surface of housing and the side face at the display element part of electric circuit system. An elastic soft sheet 5 provided on a display element 4b enters into the gap 7 to seal the gap 7 hermetically thus providing dust-proof effect. A fitting gap 8 between the housing 1 and cover 2 is eliminated even when a board 4a in the electric circuit system and an electric component system 9 push the cover 2 by setting the sheet 5 thinner than the gap 6 between a screen 3 and the display element part or setting the gap 6 thicker than the sheet 5. |
