JPS5784110A - Polarized electromagnet - Google Patents

Abstract

PURPOSE:To enable to make inversion with small electric power and to facilitate assembling ability of a polarized electromagnet by a method wherein permanent magnets are arranged between both ends of yokes arranged at both sides of a core being wound with a coil as to make the yoke sides to have the same polarity, and a movable iron piece is bridged thereon being made swingable freely. CONSTITUTION:The yokes 12a, 12b are arranged at both sides of the core 10 being wound with the coil 11 at the center part thereof, and the permanent magnets 13a, 13b, 14a, 14b are arranged between the core 10 and the yokes 12a, 12b as to make the yokes 12a, 12b to have the same polarity at both the end parts, and the core 10 sides to have the different polarity from the yoke sides. The ?-shape movable iron piece 15 is bridged on the upper face part of both the yokes 12a, 12b as to make both the right and left end parts 15a, 15b thereof to face with both the upper end parts of the core 10 and the yokes 12a, 12b, and moreover to be made swingable freely by hinge parts 15c, 15d provided at the lower center parts between the before and behind thereof. Accordingly the movable iron piece can be made to make inversion speedily with small electric power promoting and negating magnetic flux of the permanent magnets by feeding of the coil 11, the reversed movable iron piece can be attracted and held powerfully, and assembling can be facilitated.