Key switch devices with key guide means

Details Key switch devices with key guide means Key switch devices with key guide means

Filed on

1984-06-15

Date issued

1985-12-03

Examiner

Scott, J. R.

Patent Class

Electricity: circuit makers and breakers

SubClass

Electric switch details

SubSubClass

Actuators

Other Related Categories

H01H 312

Type

Patent

Status

active

Patent number

045567697

Description

ABSTRACT:
A key switch device having a key being depressable to allow a movable contact to come into contact with a pair of fixed contacts. The key is elastically supported in an opening of a housing plate and is prevented from slipping out of the opening by engagement with the key and the housing plate. The housing plate has a plurality of guide grooves formed in the inner surface of the opening in parallel with a center axis of the opening. A plurality of guide projections are formed on the lower side of the key and are slidably fitted into the guide grooves, respectively. The key can be smoothly and straightly moved along the center axis of the opening by a force applied to any point on the upper surface of the key without being inclined from the center axis.

REFERENCES:
patent: 3856998 (1974-12-01), Sims, Jr.
patent: 4117279 (1978-09-01), Schoemer
patent: 4363942 (1982-12-01), Deeg et al.
patent: 4468542 (1984-08-01), Pounds

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