| US 7,573,361 B2 | ||
| Solenoid actuator and biaxial actuator | ||
| Satoshi Sakurai, Shinagawa (Japan); Yuriko Segawa, Shinagawa (Japan); and Nobuyoshi Shimizu, Shinagawa (Japan) | ||
| Assigned to Fujitsu Component Limited, Tokyo (Japan) | ||
| Filed on Oct. 23, 2006, as Appl. No. 11/584,495. | ||
| Claims priority of application No. 2005-312396 (JP), filed on Oct. 27, 2005. | ||
| Prior Publication US 2007/0120633 A1, May 31, 2007 | ||
| Int. Cl. H01F 3/00 (2006.01); H01H 9/00 (2006.01) | ||
| U.S. Cl. 335—256 [335/207] | 3 Claims |
| 1. A solenoid actuator comprising:
a pair of coils that are coupled electrically to each other in series;
a core body that has a pair of magnets and a holding member, and moves with respect to the coils when the pair of the coils
apply magnetic force to the pair of the magnets in a substantially same direction; and
an electromagnetic element converting a magnetic power generated by the magnet into an electrical signal in order to detect
a relative position of the core body to the coil, wherein
the magnets are inserted into the coils, respectively,
the holding member holds the pair of the magnets in common, winding directions of the pair of the coils are opposite to each
other,
the pair of the magnets are arranged so that magnetization directions thereof are substantially equal in a movement direction
of the core body with respect to the coils,
the electromagnetic element is arranged facing to the holding member,
the holding member is made of a ferromagnetic material or a magnetic material,
the holding member is formed so that a distance between the holding member and the electromagnetic element changes when the
core body moves with respect to the coil.
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