Electricity: circuit makers and breakers – Electric switch details – Actuators
Patent
1996-07-16
1997-12-09
Walczak, David J.
Electricity: circuit makers and breakers
Electric switch details
Actuators
200341, H01H 1370
Patent
active
056950470
ABSTRACT:
A key switch device including a key top including a first holding portion and a second holding portion; a holding member including a third holding portion in confrontation with the first holding portion and a fourth holding portion in confrontation with the second holding portion, the holding member formed with an open portion adjacent to at least one of the third holding member and fourth holding member; and a scissor-like guide support member disposed between the key top and the holding member and including a first link member supported by the first holding portion and the fourth holding portion, a second link member supported by the second holding portion and the third holding portion, and a shaft portion pivotally supporting the first link member and the second link member, the guide support member guiding the key top in a vertical direction by switching between an open-scissor condition and a closed-scissor condition according to scissor-like movements of the first link member and second link member pivotally supported on the shaft support, the guide support member including at least one protrusion engaging with the open portion for preventing separation between the guide support member and the holding member.
REFERENCES:
patent: 4580022 (1986-04-01), Oelsch et al.
patent: 5268545 (1993-12-01), Bruner
patent: 5278371 (1994-01-01), Watanabe et al.
patent: 5278374 (1994-01-01), Takagi et al.
Brother Kogyo Kabushiki Kaisha
Walczak David J.
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