Title: Magnetic fastener
Application Number: 87105323 Application Date: 1987.07.23
Publication Number: 1016213 Publication Date: 1988.02.03
Approval Pub. Date: 1991.08.28 Granted Pub. Date: 1991.08.28
International Classifi-cation: A44B21/00;F01F7/02
Applicant(s) Name: Application Art Laboratories Co., Ltd. Address:
Inventor(s) Name: Yoshihiro Aoki
Attorney & Agent: FAN BENGUO
Abstract:
    A magnetic fastener which substantially excludes external leakage of magnetic flux therefrom. The magnetic fastener has a fixed element and a movable element. The fixed element includes a permanent magnet plate, upper and lower iron plates located on upper and lower faces of the permanent magnet plate, and an iron bar erected uprightly on the lower iron plate. The upper iron plate has an upper face flush with an upper end face of the iron bar to form a magnetic attracting face. The fixed element further includes a magnetic shield plate located above the upper iron plate around the magnetic attracting face with a magnetic gap interposed therebetween. The magnetic shield plate has a cylindrical portion which covers outer peripheries of the upper iron plate and the permanent magnet plate and contacts with an outer peripheral edge of the lower iron plate.
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