Switching device and keyboard

Details Switching device and keyboard Switching device and keyboard

H - Electricity

01

H

306/305

H01H 1/24 (2006.01) H01H 13/702 (2006.01)

Patent

CA 1045664

SWITCHING DEVICE AND KEYBOARD ABSTRACT OF THE DISCLOSURE A switching device having a movable contact element characterized by a set of unconnected, curved slots radiating outward from a central key area and equally spaced around the central key area. The radially extending un- connected, curved slots may be sections of a spiral, at least some of which sections overlap each other. Adjustment of the spring rate of the movable contact element is ac- complished by adjusting the length of the slots or by regulating the distance of the inner terminus of the slots from a central point of the central key area. The movable contact element either contacts a second contact element for contact switching or approaches the second contact element for capacitive switching. A plurality of the switching elements or members can be formed in a planar array on a continuous metallic substrate to provide a keyboard.

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