Iron core and electromagnetic driving mechanism employing the same
AssigneeTechno Takatsuki Co., Ltd.
InventorIkuo Ohya
Life of this patent
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Abstract
An iron core comprising an outer yoke, side poles disposed on both end portions of the outer yoke, and a center pole disposed between the side poles, wherein a magnetic path of polar portions of the center pole is formed as an open-circuit. There can be restricted for short-circuiting of magnetic flux of permanent magnets and thrust of an oscillator disposed at an air gap formed between electromagnets can be improved.
Claims2
An iron core comprising an outer yoke, side poles disposed on both end portions of the outer yoke, and a center pole disposed between the side poles, wherein the center pole is formed by a pair of magnetic poles connected at one end which are separated from each other along their lengths by a specified air distance, extension portions bending away from each other are formed at another end of the pair of magnetic poles, and a magnetic path of magnetic pole portions of the center pole is formed as an open-circuit.
An electromagnetic driving mechanism comprising electromagnets each composed of an iron core and a winding coil which is wound around pole portions of the iron core, and an oscillator with a pair of permanent magnets disposed in an air gap within the electromagnets and separated from each other by a specified distance, in which the iron core comprises an outer yoke, side poles disposed on both end portions of the outer yoke, and a center pole disposed between the side poles, a magnetic path of polar portions of the center pole being formed as an open-circuit,
- wherein outer shape of the pair of permanent magnets which are directly attached to a shaft assume a square or circular shape, and a polarity of the pair of permanent magnets in a peripheral direction is magnetized to be an anisotropic magnetic pole.
Dependencies are inferred from the claim text.