| 摘要 |
The invention relates to a rotatable indexing unit for a manual control member ( 2 ), comprising two indexing components ( 31, 32 ) one of which is the rotor ( 32 ) rotatably secured to said control member and the other is the stator ( 31 ) which is embodied in such a way that it is fixedly maintained with respect to the rotor. The rotor and the stator are mounted coaxially and comprise a plurality of angular segments ( 317, 318, 327, 328 ) at least some of which are magnetised in such a way that they define stable and unstable positions for said control member, and the rotor and the stator have a conical or tapering shape which makes it possible to reduce the required radial space and increase the so-called active surfaces of interaction between the magnets.
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