Keyswitch for computer keyboard

Details Keyswitch for computer keyboard Keyswitch for computer keyboard

1989-08-30

1990-07-03

Recla, Henry J.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200517, 200520, 200342, 200341, H01H 1370

Patent

active

049393243

ABSTRACT:
A keyswitch operator includes a supporting bearing block and axially movable keytop and plunger. A cylindrical plunger is slidably guided between alternating flat and conical surfaces about a through bore in the bearing block. The flat surfaces provide constant bearing guides along multiple axial lines angularly spaced about the plunger. The conical surfaces provide draft to facilitate removal of a mold after forming of the through bore. Both "quiet tactile" and "click tactile" modes of operation are available when utilizing the keyswitch operator in conjunction with a yieldable dome overlying a membrane switch assembly. "Click tactile" operation requires the addition of a spring-biased piston to physically engage the underlying switch assembly when the plunger has been depressed.

REFERENCES:
patent: 3190982 (1965-06-01), Woodcock
patent: 3586810 (1971-06-01), Brown
patent: 3624330 (1971-11-01), Bogner et al.
patent: 3928741 (1975-12-01), Comer
patent: 4467160 (1984-08-01), Murmann et al.
patent: 4480163 (1984-10-01), Morris et al.

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