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A keybutton contact foot is formed to become a holding mechanism for a keybutton flyplate as well as to provide a contact function for typamatic mode indication.
English (United States)
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Keybutton Contact Foot and Holding Mechanism
A keybutton contact foot is formed to become a holding mechanism for a
keybutton flyplate as well as to provide a contact function for typamatic mode
Capacitive keyboard 11 includes a depressible keybutton 13 and a buckling
spring 15 connected thereto. Depression of the keybutton effects buckling of the
spring and corresponding pivoting of the flyplate 17 also attached to the spring 15. Proximity of the flyplate 17 to the circuit board 19 is capacitively sensed to
indicate keybutton depression. Further keybutton depression effects movement
of the contact foot 21 into contact with typamatic contacts 23. This latter event
can be utilized to signal continued or repeat operation associated with the
keybutton. Release of the keybutton causes it to be restored to the position
depicted, the contact foot 21 acting on the underside of the flyplate 17 to insure
its proper pivoting upward.
The contact foot is bifurcated, as depicted, in order to facilitate ready
assembly of the contact foot 21 through an aperture 25 of the flyplate 17.
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