| 摘要 |
PURPOSE:To eliminate fear of magnetic interference and surely prevent lateral displacement of a male unit by engaging a cylindrical non-magnetic case having the edge collar inwardly protruded with the outer surface of a permanent magnet and by forming an abutting edge collar with the edge collar of case located on the circumference of the pole surface to which the ferromagnetic plate is abutting. CONSTITUTION:A case 6 configurates a thick engaging edge collar 6a along the outer circumference of pole surface of a plate 7 and the edge collar 6a is sharply erected as an engaging edge of a female unit, resulting in no problem of fluctuation of dimensions due to the bending process of case 6. A male unit to be engaged with a female unit is composed of a ferromagnetic plate 3 and a fitting metal 9 having bending leg pieces 9a and prevents lateral displacement as a stop device through engagement of circumference of plate 3 with the edge collar 6a. In the structure of the female unit, a magnetic path on the pole surface is focused to the plates 2, 7 while the male unit is engaged therewith or removed therefrom and the line of magnetic force of plate 2 passes a bar 4 and also passes between the upper edge of bar 4 and edge of aperture at the inside of plate 7. |
