| 摘要 |
PROBLEM TO BE SOLVED: To achieve that a structure is simple with durability and compactness, and besides, a plurality of steps can be pressed and contacted surely by a pressing force of an operator. SOLUTION: A system includes a push button operating part 5 in which surroundings are separated while one point is integrated to a cabinet 1 on the surface 1a of the cabinet 1, and which is installed capable of being pushed into the cabinet 1 having the base end of a joint part 6 with the cabinet 1 as a bending point, push switches 7, 8 which are on a substrate 2 in the cabinet 1 and which form a pair by two opposedly arranged on the backside of the push button operating part 5, and a movable stem 9 which is installed at the backside of the push button operating part 5, in which two protrusions 10, 11 protruding toward the respective push switches 7, 8 are installed, and in which the protrusions 10, 11 press the push switches 7, 8 by push-in operation of the push button operating part 5. Out of the protrusions 10, 11, in the protrusion 10 closer to the bending point, the protruding length is longer so as to be close to the opposed push switch 7, and the protruding length becomes stepwisely shorter in the protrusion 11 farther from the bending point. COPYRIGHT: (C)2008,JPO&INPIT
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