Pivotable key keyboard with biased detents

Details Pivotable key keyboard with biased detents Pivotable key keyboard with biased detents

H - Electricity

01

H

340/187

H01H 13/70 (2006.01) H01H 21/22 (2006.01)

Patent

CA 1218726

INVENTION OF Morris Donald FULLER and David Brian JOYCE TITLE OF THE INVENTION IMPROVEMENTS RELATING TO KEYBOARDS ABSTRACT OF THE DISCLOSURE A keyboard, particularly for control of electronics in vehicles, has at least one key mounted in a recess in the keyboard and pivotable about a pivot to press against a shaped portion of a rubber gasket to operate an electrical switch. A display, preferably a multiple character LCD, for labellingthe switch is visible through a transparent member and connected to a p.c.b. by zebra striped members. The display is not obscured by a finger operating the key. The key has a transverse bore in which a compression spring is mounted with balls at the end of the spring to co-operate with stepped generally cylindrical members mounted with their axes perpendicular to the pivot pin and forming detent means to give the key a tactile operation. Preferably the key operates three switches by way of three shaped portions.

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