Electricity: circuit makers and breakers – Electric switch details – Actuators
Patent
1994-09-28
1995-08-15
Recla, Henry J.
Electricity: circuit makers and breakers
Electric switch details
Actuators
200341, 200512, 200521, H01H 1370
Patent
active
054421527
ABSTRACT:
A film with a first circuit printed on a lower surface, a film insulator and a film with a second circuit printed on an upper surface are mounted on the keyboard. Each of the first and second circuits includes a plurality of contacts. The film insulator defines a plurality of apertures. One of the contacts of the first circuit will be engaged with one of the contacts of the second circuit through one of the apertures defined in the film insulator if a key switch is pressed. The key switch includes a frame defining two vertical slots. A slidable member includes a plate, two hooks projecting downwardly from the plate and each including a barb for engaging with one of the vertical slots and a hollow cylinder projecting downwardly from the plate and defining two vertical slots. A cup includes two barbs projecting radially inwardly therefrom. The hollow cylinder is insertable in the cup. The barbs formed on the cup are engageable in the slots defined in the hollow cylinder. A spring is received in the hollow cylinder and the cup for biasing the cup from the hollow cylinder. A resilient member is formed as an inverted funnel. The resilient member includes a closed upper end and an open lower end mounted on the first circuit and a boss projecting downwardly from the closed upper end thereof for engaging the contact of the first circuit with the contact of the second circuit.
REFERENCES:
patent: 5173578 (1992-12-01), Tame
patent: 5380970 (1995-01-01), Mizuno et al.
Focus Electronic Co., Ltd.
Pelton William E.
Recla Henry J.
Walczak David J.
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