Pushbutton type keyboard switch

Details Pushbutton type keyboard switch Pushbutton type keyboard switch

1989-01-24

1990-04-17

Sholl, Linda J.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200345, 200517, H01H 312

Patent

active

049182714

ABSTRACT:
A low-profile keyboard switch having an improved guide structure for guiding the vertical motion of the keys. Each key assembly comprises a guide member and a key including a keypad, a downwardly projecting central plunger and a downwardly projecting leg or skirt, the inner dimension of the leg or skirt being greater than the outer dimension of the guide member. The guide member is provided with a generally horizontal central opening adapted to receive the plunger and generally vertical peripheral walls which serve as a bearing surface for slide cams which project inwardly from the inner surface of the leg or skirt. Together the contact between the key, the central opening and the peripheral walls assure a vertical orientation for the key and a reduced resistance to key motion.

REFERENCES:
patent: 2040919 (1936-05-01), Caldwell
patent: 3663780 (1972-05-01), Godbeck
patent: 3707609 (1972-12-01), Dapot et al.
patent: 3721778 (1973-03-01), Seeger, Jr. et al.
patent: 3916131 (1975-10-01), Golbeck et al.
patent: 4354081 (1982-10-01), Serras-Paulet

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