MAGNETIC DEVICE FOR ROTATING ARBOUR IN TIMEPIECE MOVEMENT

PROBLEM TO BE SOLVED: To provide a rotating device by which a spatial distribution of a magnetic field generated by a magnet can be determined with high accuracy.SOLUTION: The rotating device which rotates an arbour 101 around a prescribed axis comprises at least one magnetic bearing 105 having a pi...

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Bibliographic Details
Main Authors DAVIDE SARCHI, MARECHAL SYLVAIN, BENOIT LEGERET, ZAUGG ALAIN
Format Patent
LanguageEnglish
Japanese
Published 12.01.2017
Subjects
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Summary:PROBLEM TO BE SOLVED: To provide a rotating device by which a spatial distribution of a magnetic field generated by a magnet can be determined with high accuracy.SOLUTION: The rotating device which rotates an arbour 101 around a prescribed axis comprises at least one magnetic bearing 105 having a pivot 103 made of a magnetic material of the arbour and a magnet 106 exerting attraction. The bearing 105 comprises a magnetic flux centering structure 60 disposed between the magnet 106 and the pivot 103, and a support body 144 for the centering structure. The centering structure includes a peripheral part and a center part elastically connected to the peripheral part by at least one connection element, and the center part is made of a material having a high permeability and is constituted to be smaller in size than the magnet. The peripheral part is firmly and forcibly fitted to the support body 144 so that the center part is centered at the rotation axis.SELECTED DRAWING: Figure 4 【課題】磁石が発生する磁界の空間分布を高い精度で決めることができるような回転デバイスを提供する。【解決手段】所定の軸のまわりにアーバー101を回転させる回転デバイスは、アーバーの磁性材料で作られているピボット103と引力がはたらく磁石106を有する少なくとも1つの磁気ベアリング105を有する。また、ベアリング105は、磁石106とピボット103の間に配置された磁束センター化構造60と、及びセンター化構造用の支持体144とを有する。このセンター化構造は、周部と、及び少なくとも1つの接続要素によって周部に弾性接続している中心部とを有し、中心部は、透磁性が高い材料で作られており磁石よりも小さな寸法構成を有する。周部は、中心部が回転軸にセンター化されるように支持体144に堅固に強制的に嵌められている。【選択図】図4
Bibliography:Application Number: JP20160107117