Patent ID: 9741507
Date: 2017-08-22
CPC Classifications: H01H

Claim:
1. A key switch device comprising: an operation member to be depressed; a switch disposed below the operation member; a reaction force generating member that is provided between the operation member and the switch, has elasticity, performs elastic buckling deformation by depression of the operation member when the operation member is depressed, and has a first load displacement characteristic in which a depression load of the operation member increases until the reaction force generating member performs the elastic buckling deformation and the depression load of the operation member decreases after the reaction force generating member performs the elastic buckling deformation, according to depression of the operation member; and a depression member that is provided between the operation member and the switch, depresses the switch, and has a second load displacement characteristic in which the depression load of the operation member increases linearly after the depression member comes into contact with the switch, wherein a combined load of the first load displacement characteristic and the second load displacement characteristic increases until the reaction force generating member performs the elastic buckling deformation, and subsequently decreases with an increase in the amount of the depression of the operation member.