| 摘要 |
PROBLEM TO BE SOLVED: To provide a thin product having a switch center and five point contacts. SOLUTION: A circuit substrate 2 having a plurality of switch contacts is provided, dome metallic springs 6 are arranged in a plurality of sections (for example, four directions) in a central part and its peripheral part of the circuit substrate 2, a pair of metallic plungers 7 with dowel capable of moving independently are arranged in the springs in four directions, and a cross-shaped main plunger 5 having a plurality of (four) operation arms is arranged on it to support respective plungers 5, 7 by a first support part D and a second support part E of a mold frame 3. The relation of central stroke S1 and four direction strokes S2 is S1<S2, and the relation of a distance L1 from a projecting part 7a of the metallic plunger 7 to a tip of a pressing part and a distance L2 from the projecting part 7a to an end part 7b is L1>L2, and a central part and a tip part of the cross-shaped main plunger 5 are pressed to operate any one of switch contacts. As a result, it is possible to provide an inexpensive and thin product having five point contacts.
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