ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALJDIM350 (Ver 2.1 Jan 2001) 1620000/01124244EUROPEAN PATENT APPLICATIONA320011219EP01102773.72001020820010208EnEnEn200013222220000501JP200003389220000210JP20011219200151200108162001337 7H 01H 51/22 A 7H 01H 33/66 BdeDrehbetätigungsmechanismus für SchaltvorrichtungenRotary operating mechanism for switchgearfrDispositif de commande rotatif pour appareillage de commutation3AKABUSHIKI KAISHA TOSHIBA0021313086 280 a/schoTOSHIBA, KABUSHIKI KAISHA72, Horikawa-cho, Saiwai-kuKawasaki-shi, Kanagawa-ken 210-8572JPYamazaki, Toshiharuc/o Toshiba Corporation, Intellectual Prop. Div.1-1 Shibaura 1-chome Minato-ku Tokyo 105JPTokumasu, Tadashic/o Toshiba Corporation, Intellectual Prop. Div.1-1 Shibaura 1-chome Minato-ku Tokyo 105JPIshikawa, Yoshinobuc/o Toshiba Corporation, Intellectual Prop. Div.1-1 Shibaura 1-chome Minato-ku Tokyo 105JPMurakami, Shinc/o Toshiba Corporation, Intellectual Prop. Div.1-1 Shibaura 1-chome Minato-ku Tokyo 105JPKoshiyama, Tetsushic/o Toshiba Corporation, Intellectual Prop. Div.1-1 Shibaura 1-chome Minato-ku Tokyo 105JPHOFFMANN - EITLE00101511Patent- und Rechtsanwälte Arabellastrasse 481925 MünchenDEATBECHCYDEDKESFIFRGBGRIEITLILUMCNLPTSETRALLTLVMKROSI20011219200151

A rotary mechanism for operating switchgear has a fixed core (51), a rotary core (52) rotatable within a rotation range limited by end positions corresponding to switchgear open and closed positions, a spring unit for accumulating resilience when the rotary core (52) is rotated to any one of the end positions, a permanent magnet (5) for generating attraction greater than the resilience of the spring unit, to hold the rotary core (52) at any one of the end positions, and an electromagnetic coil (4A,4B) for forming, when the rotary core is at one of the end positions, a magnetic path to weaken the attraction of the permanent magnet lower than the resilience of the spring unit so that the rotary core (52) may be rotated to the other end position where the permanent magnet (5) and electromagnetic coil form magnetic paths oriented in the same direction. This rotary operating mechanism has a wide application range, a bistable characteristics, a permanent magnet attraction switching function, and a long switching stroke.