Circuit unit for electronic instrument having key-pad arrangemen

Details Circuit unit for electronic instrument having key-pad arrangemen Circuit unit for electronic instrument having key-pad arrangemen

1993-07-09

1994-10-18

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

361749, 200512, 200513, H01H 1370

Patent

active

053570650

ABSTRACT:
A circuit unit is used in an electronic instrument having a key-pad arrangement, such as a portable telephone, and comprises a printed circuit board, a flexible switch circuit sheet attached to the printed circuit board and having a plurality of switch pads arranged thereon, and at least one circuit pattern formed in the flexible switch circuit sheet so as to construct a switch circuit together with the switch pads. The circuit pattern includes a plurality of line sections extended between the switch pads, and a plurality of terminals provided along a peripheral edge of the flexible switch circuit sheet for establishing an electrical connection between the printed circuit board and the flexible switch circuit sheet.

REFERENCES:
patent: 4245138 (1981-01-01), Harper
patent: 4314117 (1982-02-01), Ditzig
patent: 4349712 (1982-09-01), Michalski
patent: 4609792 (1986-09-01), Levasseur
patent: 4916275 (1990-04-01), Almond
patent: 5294762 (1994-03-01), Kaizu et al.

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