| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a key switch that further reduces operation sound while ensuring click feeling and is superior in quietness. <P>SOLUTION: The key switch comprises: an insulating substrate 3 having fixed contacts 31 and 32 disposed on the surface; a snap plate 2 made of a dome-shaped metallic plate that is deformable and has a spring property; and a buffer material 4 to be inserted between the insulating substrate and the snap plate disposed on the surface of the insulating substrate. The buffer material is composed of a spacer sheet 41 having a punching hole 40 formed at a position corresponding to the fixed contacts and an upper sheet 42 and a lower sheet 43 stuck together with the spacer sheet interposed therebetween. The lower sheet is stuck on the surface of the insulating substrate with another spacer sheet 5 having another punching hole 50 formed at a position corresponding to the fixed contacts interposed therebetween. Also, on the upper surface of the upper sheet, the snap plate is disposed to stride across the punching hole. On the top surface of the snap plate, a recessed section 20 having a flat bottom surface 20a is formed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
