To provide a diaphragm for a flat switch having a through hole avoiding defective contact at the central part, avoiding the adhesive component of a cover film covering the diaphragm for the flat switch and a base board from being transcribed on a wiring pattern of the base board when the flat switch is pushed down.
The diaphragm 10 for the flat switch having a through hole 11 approximately at the central part, of which, a disc-shaped central part is curved into convex-shape, comprises a first contact 12, applying the outer periphery of the diaphragm 10 as a contact, a protruded part 13 formed at the inner peripheral edge of the through hole 11 so as to protrude toward concave side of the diaphragm 10, and a second contact 14 applying the top end part of the protruded part 13 as a contact.
| JPH11195343 | SWITCH BOARD |
| JP3372411 | [Title of Invention] Push Switch |
HIRAI YASUSHI
KAWAHIRA TETSUYA
