ROTARY ACTUATOR

WIPO Patent Application WO/2014/136233

A1

[Problem] To provide a novel actuator, the purpose of which is to ensure a retention force that keeps said actuator in a stopped state without power despite the case thereof being formed from a lightweight, easily moldable synthetic-resin material. [Solution] This actuator (1) comprises the following: a case (2) that comprises a nonmagnetic material and provides a prescribed internal space; an electromagnet (3) provided inside said case; two magnets (6) that face a pole face of the electromagnet and are laid out such that opposite pole faces of said magnets lie at a separation from each other in the same plane, said plane being parallel to the aforementioned pole face of the electromagnet; an arm (5) that holds the two magnets and swings back and forth in a plane parallel to the aforementioned pole face of the electromagnet with an air gap between said pole face and the arm; an output shaft (4) that axially supports the arm inside the case and axially outputs the force of the aforementioned swinging; and a magnetic-circuit-forming body (7) disposed inside or outside the case so as to form a magnetic circuit between the non-facing poles of the electromagnet and the magnets laid out as described above. Said magnetic-circuit-forming body (7) is formed from a rectangular plate.

ISHIKAWA TOSHIYUKI (JP)
MOTOYANAGI MASAYUKI (JP)

PCT/JP2013/056226

September 12, 2014

March 07, 2013

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OKI MICRO ENGINEERING COMPANY LTD (JP)
ISHIKAWA TOSHIYUKI (JP)
MOTOYANAGI MASAYUKI (JP)

H02K33/16

JP2012175735A	2012-09-10
JP2007236037A	2007-09-13
JP2001083567A	2001-03-30

MIZUNO HIROFUMI (JP)
Hirofumi Mizuno (JP)

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