| 摘要 |
PROBLEM TO BE SOLVED: To make a switch compact in size, reduce number of part items, manufacturing man-hours for cost reduction. SOLUTION: An impact force due to a return force of a contact pressing spring 25 of a movable contact plate 19 is received by a shaft integrated collar 18a, and a cylindrical portion 22a of a spring fitting metal 22 is overlaid on the inside diameter portion of the contact pressing spring 25. A hollow cylindrical coil 14 is axially and radially grabbed by a case side plate 16 and a side plate 17, having a tapered projection 17a to integrate it with a case 15. The movable contact plate 19 and the contact pressing spring 25 are structured, so that they can be mounted integrally to each other through simply the insulating spring fitting metal having a cylindrical part for an insulating shaft, and through the insulating spring fitting metal and an insulating washer (bush) for a conductive shaft. The strength of the impact force receiving portion of the shaft can be easily secured, and the switch can withstand large vibrations in a small-sized and simple structure. Low cost can be realized by reducing the number of part items and manufacturing (assembling) man-hours.
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