Effects of joints on contact reliability in miniature precision snap-acting switches

Author

Maeda, Munenori ; Kinoshita, Moto

Author_Institution

Omron Corp., Kyoto

fYear

1990

fDate

20-24 Aug 1990

Firstpage

352

Lastpage

369

Abstract

The results of a study examining to what extent the joints of a miniature precision snap-acting switch affect the contact reliability of the switch are reported. The results revealed that in a sample which incorporates a movable contact blade and a movable spring (both of which are made of phosphor bronze), a common terminal made of silver-plated brass, and gold crossbar contacts, the joints were responsible for more than 80% of the rise in the contact resistance of the switch in each of the mechanical life, minute load, sulfurated gas resistance, and high-temperature/moisture resistance tests. The contact surface of each joint constantly changes with the action of the switch, and by its sliding action oxide due to abrasion is apt to be generated

Keywords

contact resistance; reliability; switches; contact reliability; contact resistance; joints; mechanical life; miniature precision snap-acting switches; moisture resistance tests; movable contact blade; movable spring; sliding action; Connectors; Contact resistance; Electrical resistance measurement; Force measurement; Mechanical variables measurement; Stability; Statistical analysis; Stress; Switches; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Contacts, 1990. Proceedings of the Thirty-Sixth IEEE Holm Conference on ... and the Fifteenth International Conference on Electrical Contacts

Conference_Location

Montreal, Que.

Type

conf

DOI

10.1109/HOLM.1990.113032

Filename

113032