Magnetic closure device
AssigneeApplication Art Laboratories Co., Ltd.
InventorYoshihiro Aoki
Life of this patent
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Abstract
A magnetic closure device is configured to allow for a reduction in the magnetic gap as well as for adding mechanical strength to a cover for enclosing the magnet supply and other associated parts on one of two separate elements. The magnetic closure device includes a first element and a second element which are magnetically and mechanically coupled together and may be detached. The first element A includes an annular member formed to have a thick wall and mounted around the cover. The annular member includes ornamentation at its surface. The annular member may be formed from brass or other nonmagnetic materials, including plastics.
Claims25
A magnetic closure device comprising:
- a magnetically attracting first element;
- a magnetically attractable second element comprising a ferromagnetic plate;
- wherein said first element comprises a cylindrical magnet having a central axial bore and first and second axial ends respectively with first and second opposite polarities, a ferromagnetic plate fixed to said first end of said cylindrical magnet, a ferromagnetic rod extending from said ferromagnetic plate of said first element into said central axial bore of said cylindrical magnet, an annular cover member covering said second axial end of said cylindrical magnet, and an annular cylindrical wall fixedly mounted around said cylindrical magnet;
- and
- wherein said annular cylindrical wall is substantially thicker than said annular cover member.
Dependencies are inferred from the claim text.