Title :
Effects of joints on contact reliability in miniature precision snap-acting switches
Author :
Maeda, Munenori ; Kinoshita, Moto
Author_Institution :
Omron Corp., Kyoto
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;
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.
DOI :
10.1109/HOLM.1990.113032
