Circuit unit for electronic instrument having key-pad arrangement
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United States of America Patent
Stats
-
Oct 18, 1994
Grant Date -
N/A
app pub date -
Jul 9, 1993
filing date -
Jul 10, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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