| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of chattering by stabilizing the contact of a switch. SOLUTION: The abutting surface of a switch structure abutting on a surface formed on a substrate comprises an electric contact part and a non-electric contact part. When the switch structure is abutted on the substrate according to the driving state of a driving member accompanying the normal switch operation, the non-electric contact part on the abutting surface of the switch structure is abutted on the surface formed on the substrate and thereafter the electric contact part on the abutting surface of the switch structure is abutted. When the switch structure is abutted on the substrate according to the driving state of the driving member accompanied with unnecessary noises except for normal switch operation. Only the non-electric contact part on the abutting surface of the switch structure is abutted on the surface formed on the substrate. Thus, the switch is always in stable contact, thereby the occurrence of chattering is prevented. COPYRIGHT: (C)2003,JPO
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