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This article describes a snap-on metal connector for establishing an electrical connection between the pad card and the flexible diaphragm switch card of an electronic keyboard structure.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
76% of the total text.
Page 1 of 2
Keyboard High Pressure Electrical Connector
This article describes a snap-on metal connector for establishing an
electrical connection between the pad card and the flexible diaphragm switch
card of an electronic keyboard structure.
A schematic illustration of a keyboard assembly is depicted in Fig. 1. The
keyboard assembly 10 comprises a key plate 12, a pad card 14, a layer of
dielectric material 16, a diaphragm switch card 18 and machine frame 20. The
key modules 22 rest upon a corresponding sense pad 24 and coupling pad 26 on
pad card 14. The conductive pads 24 and 26 carry electrical signals that
indicate whether an actuating mechanism (not shown) inside key module 22 is
resting upon pad card 14 or raised therefrom. Keybutton 28 is connected to the
actuating mechanism via keybutton support 30. A foam layer 32 inside key plate
12 reduces noise and dirt contamination and also holds the key modules 22
against pad card 14.
In Fig. 2, the individual components set forth in Fig. 1 have been meshed
together to form keyboard assembly 10. The wiper arms 34 of snap-on metal
connectors 36 snap directly into mating holes 38 in pad card 14. The ends of
wiper arms 34 are held against conductor pads 40 on pad card 14 by key plate
12 when the keyboard is assembled. The snap-on connectors 36 can be
snapped out when keyboard assembly 10 is disassembled. The crimped arms
42 of snap-on metal connectors 36 are held snugly against conductor pads 43 to
establish a reliable electrica...