Key-top panel and keyboard structure using the panel

Details Key-top panel and keyboard structure using the panel Key-top panel and keyboard structure using the panel

1982-05-03

1985-01-01

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200340, H01H 1370

Patent

active

044917023

ABSTRACT:
A key-top panel constructed of an electrically non-conductive, resilient material and formed with closed-loop grooves each of which has a closed-loop cross section, each of the closed-loop grooves being deep in the direction of thickness of the key-top panel and having a land portion surrounded by the groove; key-top portions each constituted by the land portion; concavities which are open at the inner face of the key-top panel and which are in registry in cross section with the key-top portions, respectively; and skirt portions each formed between each of the closed-loop grooves and each of the concavities so that the key-top portion surrounded by each closed-loop groove is bridged to an inner wall portion of the key-top panel through each of the skirt portions. The key-top panel may form part of a keyboard structure which may further comprise movable contact elements respectively positioned within the concavities and each fixedly attached to the aforesaid inner end surface portion of each key-top portion.

REFERENCES:
patent: 3617660 (1971-11-01), Krakinowski
patent: 3760137 (1973-09-01), Shimojo et al.
patent: 3932722 (1976-01-01), Obata et al.
patent: 3971902 (1976-07-01), Wulf et al.
patent: 4127752 (1978-11-01), Lowthorp
patent: 4237351 (1980-12-01), Boulanger et al.
patent: 4293754 (1981-10-01), Komaki

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