Push button switch

Details Push button switch Push button switch

1987-08-18

1988-07-05

Recla, Henry J.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200290, 200159B, H01H 1300

Patent

active

047556455

ABSTRACT:
A coil spring constituting a pushbutton switch includes an intermediate diameter coil spring part serving as a tension spring coil spring part serving to depress a movable contact. This reduces the number of parts being needed. In addition, a housing guides a pushbutton support arm fixedly inserted into a groove formed between the casing and a guide part and the tip end of the support arm is adapted to strike the bottom of the housing in depression of the pushbutton and is thereby stopped, while the tip end is stopped by a stopper when the support arm is returned. Moreover, a projection part of a pushbutton body is pushed into the coil spring whereby the intermediate coil spring part is elongated while the small diameter coil part is contracted for closing the contacts, the contacts thereupon being released by the return of the pushbutton.

REFERENCES:
patent: 4313685 (1982-02-01), Stahl et al.
patent: 4468542 (1984-08-01), Pounds
patent: 4529848 (1985-07-01), Cherry
Word Processor File Keyboards, ESU--22 and ESU--21, Matsushita Electrical Co., Ltd.

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