| 摘要 |
PROBLEM TO BE SOLVED: To provide a linear actuator that can surely prevent facing parts of an outer yoke and an inner yoke from being displaced by the sucking force of a magnet, and a pump device and a compressor using the linear actuator. SOLUTION: The linear actuator 1 comprises an inner yoke 3, an outer yoke that forms a first space 6 and a second space 7 between the inner yoke 3 and itself, and a movable body 5 having a platy magnet 9 between the spaces 6, 7. An engaging projection 82 that is engaged with the first facing part 410 and the second facing part 420 and prevents the facing parts 410, 420 from being displaced by the suction of the magnet 9 is formed at a body 81 of a coil bobbin 80 wound with a coil 8. COPYRIGHT: (C)2005,JPO&NCIPI
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