Magnetic shield structure having openings and a magnetic material frame therefor

Abstract

A magnetic shield structure having openings, the structure comprising a plurality of similar magnetic blind bodies, each blind bodyhaving an imaginary blind core plane F and a plurality of magnetic material slatsbeing spaced from each other by a distance d required for magnetic shielding, each slatintersecting the blind core plane F at a longitudinal central axis C thereof, the longitudinal central axes of the slats are oriented substantially in parallel to each other on the blind core plane F. The blind bodiesare coupled in a row by serially coupling each slatin each blind bodyto a corresponding slatof adjacent blind bodythrough overlapping or abutting of slat terminal portions, whereby the blind core planes Fa, Fb of the blind bodiesare so coupled as to define a successive magnetic shield plane, and spaces d between adjacent slatsin each blind bodyform openings in the magnetic shield structure. Preferably, three or more magnetic blind bodiesare coupled in a row so as to form a closed magnetic path. The blind bodiesmay be stacked side by side in such a manner that the blind core plane Fa, Fb are parallel to each other and orientation of the slat central axes in each blind bodybeing selected so as to optimize attenuation of magnetic field across the magnetic shield structure.