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AssigneeFurukawa Electric Co., Ltd.
InventorsTomoaki Toratani, Toshiro Yamamoto, Hiroshi Morimoto, Kyutaro Abe, Masahiro Hasegawa, Akira Noguchi, Kosuke Yamawaki
Estimating the term…
A rotation sensor functioning as both a rotation-angle sensor and a torque sensor is provided which, when applied to a steering sensor for an automobile, for example, permits reduction in the number of components and thus in the weight of the automobile and contributes to conservation of global environment. The rotation sensor has slip rings covered with conductive synthetic resin having small coefficient of friction, allowing the contact pressure of brushes disposed in sliding contact with the slip rings to be kept low and the life duration of the slip rings to be prolonged. Further, no metal powder is produced when the brushes slide on the respective slip rings, and it is therefore possible to prevent the formation of unwanted insulating film.
A rotation sensor mounted on a rotatable shaft to detect a rotation angle of said shaft, comprising:
A slip ring utilized for detection of a rotation angle of a shaft in a rotation sensor mounted on the shaft, said rotation sensor including first and second members each surrounding said shaft, being disposed separately from each other along an axis of said shaft, and relatively rotating along with rotation of said shaft, said first member carrying said slip ring, and a conductive brush carried on said second member and slidably contacting said slip ring, wherein a sliding-contact position between said brush and said slip ring is displaced in a circumferential direction of said slip ring according to the rotation angle of said shaft when said first and second members relatively rotate, said slip ring comprising:
Dependencies are inferred from the claim text.