| 摘要 |
A magnetic coupling comprises two parts of an optical instrument, for example, of a microscope, which are to be releasably coupled together. A locating surface is formed on one part, this surface comprising one or more areas defined by bodies composed of a magnetic material which are spaced apart at intervals, the other part comprising a locating surface comprising areas defined by bodies composed of a material which can be magnetized. In order to avoid mechanical shocks caused by a powerful magnetic attraction as the parts are coupled, the material which can be magnetized, and which is associated with one of the locating surfaces, is confined to one or more areas of this surface, the arrangement of these areas corresponding to that of the areas on the locating surface. Other parts of the locating surface are composed of a material which cannot be magnetized. The coupling operation is carried out, firstly, by offering up one of the parts in an opposed position in which position no magnetic attraction is effective. The two parts are rotated, relative to one another when they have contacted each other, thus effecting the overlapping of the magnetic areas with the areas which can be magnetized, and thereby effecting coupling. |
