| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a sufficient click feeling regardless of an operation position of a key top. <P>SOLUTION: A bush button switch device comprises: a base part 10 provided with a pair of stationary contact points 16; an operation member 40 moving toward the base part 10 by a pressurizing operation; an actuating member 20 interposed between the base part 20 and the operation member 40, elastically deformed by the pressurizing operation of the operation member 40, and giving a non-linear repulsive force to the operation member 40 according to elastic deformation; a movable contact point 25 contacting the base part 10 by elastic deformation with the pressurizing operation of the operation member 40 and short-circuiting a pair of the stationary contact points 16; restraining means actuating with the operation member 40 in the pressurizing operation of the operating member 40 and restraining a moving direction of the operation member 40 so that the operation member 40 moves at a constant posture. The restraining means has a pair of link members 50 engaged with each other. Each one end of a pair of the link members 50 is rotatably supported by the base part 10, and each of the other ends is rotatably supported by the operation member 40. <P>COPYRIGHT: (C)2012,JPO&INPIT |
